chore(deps): bump undici from 5.28.5 to 7.22.0

Bumps [undici](https://github.com/nodejs/undici) from 5.28.5 to 7.22.0.
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](https://github.com/nodejs/undici/compare/v5.28.5...v7.22.0)

---
updated-dependencies:
- dependency-name: undici
  dependency-version: 7.22.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.agents/skills/dependabot-pr-rollup/SKILL.md

@@ -0,0 +1,48 @@
+---
+name: dependabot-pr-rollup
+description: Find open Dependabot PRs for the current GitHub repo, compare each PR head to its base branch, replay only the net dependency changes in a fresh worktree and branch, run npm validation, and optionally commit, push, and open a PR. Use when you want to batch or manually replicate active Dependabot updates.
+license: MIT
+compatibility: Requires git, git worktree, gh CLI auth, npm, and a GitHub repo with an origin remote.
+---
+
+# Dependabot PR Rollup
+
+## When to use
+
+Use this skill when the user wants to:
+- find all open Dependabot PRs in the current repo
+- reproduce their net effect in one local branch
+- validate the result with the repo's standard npm checks
+- optionally commit, push, and open a PR
+
+## Workflow
+
+1. Inspect the current checkout state, but do not reuse a dirty worktree.
+2. List open Dependabot PRs with `gh pr list --state open --author app/dependabot`.
+3. For each PR, collect the title, base branch, head branch, changed files, and relevant diffs.
+4. Compare each PR head against `origin/<base>` instead of trusting the PR title. Dependabot PRs can already be partially merged, superseded by newer versions, or have no remaining net effect.
+5. Create a new worktree and branch from `origin/<base>`.
+6. Reproduce only the remaining dependency changes in the new worktree.
+   - Inspect `package.json` before editing.
+   - Run `npm ci --ignore-scripts` before applying updates.
+   - Use `npm install ... --ignore-scripts` for direct dependency changes so `package-lock.json` stays in sync.
+7. Run `npm run all`.
+8. If requested, commit the changed source, lockfile, and generated artifacts, then push and open a PR.
+
+## Repo-specific notes
+
+- Use `gh` for GitHub operations.
+- Keep the user's original checkout untouched by working in a separate worktree.
+- In this repo, `npm run all` is the safest validation command because it runs build, check, package, and test.
+- If dependency changes affect bundled output, include the regenerated `dist/` files.
+
+## Report back
+
+Always report:
+- open Dependabot PRs found
+- which PRs required no net changes
+- new branch name
+- new worktree path
+- files changed
+- `npm run all` result
+- if applicable, commit SHA and PR URL

.github/copilot-instructions.md

@@ -1,263 +0,0 @@
-# Copilot Instructions for setup-uv
-
-This document provides essential information for GitHub Copilot coding agents working on the `astral-sh/setup-uv` repository.
-
-## Repository Overview
-
-**setup-uv** is a GitHub Action that sets up the [uv](https://docs.astral.sh/uv/)
-Python package installer in GitHub Actions workflows.
-It's a TypeScript-based action that downloads uv binaries, manages caching, handles version resolution,
-and configures the environment for subsequent workflow steps.
-
-### Key Features
-
-- Downloads and installs specific uv versions from GitHub releases
-- Supports version resolution from config files (pyproject.toml, uv.toml, .tool-versions)
-- Implements intelligent caching for both uv cache and Python installations
-- Provides cross-platform support (Linux, macOS, Windows, including ARM architectures)
-- Includes problem matchers for Python error reporting
-- Supports environment activation and custom tool directories
-
-## Repository Structure
-
-**Size**: Small-medium repository (~50 source files, ~400 total files including dependencies)
-**Languages**: TypeScript (primary), JavaScript (compiled output), JSON (configuration)
-**Runtime**: Node.js 24 (GitHub Actions runtime)
-**Key Dependencies**: @actions/core, @actions/cache, @actions/tool-cache, @octokit/core
-
-### Core Architecture
-
-```
-src/
-├── setup-uv.ts          # Main entry point and orchestration
-├── save-cache.ts        # Post-action cache saving logic
-├── update-known-versions.ts  # Maintenance script for version updates
-├── cache/               # Cache management functionality
-├── download/            # Version resolution and binary downloading
-├── utils/               # Input parsing, platform detection, configuration
-└── version/             # Version resolution from various file formats
-```
-
-### Key Files and Locations
-
-- **Action Definition**: `action.yml` - Defines all inputs/outputs and entry points
-- **Main Source**: `src/setup-uv.ts` - Primary action logic
-- **Configuration**: `biome.json` (linting), `tsconfig.json` (TypeScript), `jest.config.js` (testing)
-- **Compiled Output**: `dist/` - Contains compiled Node.js bundles (auto-generated, committed)
-- **Test Fixtures**: `__tests__/fixtures/` - Sample projects for different configuration scenarios
-- **Workflows**: `.github/workflows/test.yml` - Comprehensive CI/CD pipeline
-
-## Build and Development Process
-
-### Prerequisites
-
-- Node.js 24+ (matches GitHub Actions runtime)
-- npm (included with Node.js)
-
-### Essential Commands (ALWAYS run in this order)
-
-#### 1. Install Dependencies
-
-```bash
-npm install
-```
-
-**Timing**: ~20-30 seconds
-**Note**: Always run this first after cloning or when package.json changes
-
-#### 2. Build TypeScript
-
-```bash
-npm run build
-```
-
-**Timing**: ~5-10 seconds
-**Purpose**: Compiles TypeScript source to JavaScript in `lib/` directory
-
-#### 3. Lint and Format Code
-
-```bash
-npm run check
-```
-
-**Timing**: ~2-5 seconds
-**Tool**: Biome (replaces ESLint/Prettier)
-**Auto-fixes**: Formatting, import organization, basic linting issues
-
-#### 4. Package for Distribution
-
-```bash
-npm run package
-```
-
-**Timing**: ~20-30 seconds
-**Purpose**: Creates bundled distributions in `dist/` using @vercel/ncc
-**Critical**: This step MUST be run before committing - the `dist/` files are used by GitHub Actions
-
-#### 5. Run Tests
-
-```bash
-npm test
-```
-
-**Timing**: ~10-15 seconds
-**Framework**: Jest with TypeScript support
-**Coverage**: Unit tests for version resolution, input parsing, checksum validation
-
-#### 6. Complete Validation (Recommended)
-
-```bash
-npm run all
-```
-
-**Timing**: ~60-90 seconds
-**Purpose**: Runs build → check → package → test in sequence
-**Use**: Before making pull requests or when unsure about build state
-
-### Important Build Notes
-
-**CRITICAL**: Always run `npm run package` after making code changes. The `dist/` directory contains the compiled bundles that GitHub Actions actually executes. Forgetting this step will cause your changes to have no effect.
-
-**TypeScript Warnings**: You may see ts-jest warnings about "isolatedModules" - these are harmless and don't affect functionality.
-
-**Biome**: This project uses Biome instead of ESLint/Prettier. Run `npm run check` to fix formatting and linting issues automatically.
-
-## Testing Strategy
-
-### Unit Tests
-
-- **Location**: `__tests__/` directory
-- **Framework**: Jest with ts-jest transformer
-- **Coverage**: Version resolution, input parsing, checksum validation, utility functions
-
-### Integration Tests
-
-- **Location**: `.github/workflows/test.yml`
-- **Scope**: Full end-to-end testing across multiple platforms and scenarios
-- **Key Test Categories**:
-  - Version installation (specific, latest, semver ranges)
-  - Cache behavior (setup, restore, invalidation)
-  - Cross-platform compatibility (Ubuntu, macOS, Windows, ARM)
-  - Configuration file parsing (pyproject.toml, uv.toml, requirements.txt)
-  - Error handling and edge cases
-
-### Test Fixtures
-
-Located in `__tests__/fixtures/`, these provide sample projects with different configurations:
-- `pyproject-toml-project/` - Standard Python project with uv version specification
-- `uv-toml-project/` - Project using uv.toml configuration
-- `requirements-txt-project/` - Legacy requirements.txt format
-- `cache-dir-defined-project/` - Custom cache directory configuration
-
-## Continuous Integration
-
-### GitHub Workflows
-
-#### Primary Test Suite (`.github/workflows/test.yml`)
-
-- **Triggers**: PRs, pushes to main, manual dispatch
-- **Matrix**: Multiple OS (Ubuntu, macOS, Windows), architecture (x64, ARM), and configuration combinations
-- **Duration**: ~5 minutes for full matrix
-- **Key Validations**:
-  - Cross-platform installation and functionality
-  - Cache behavior and performance
-  - Version resolution from various sources
-  - Tool directory configurations
-  - Problem matcher functionality
-
-#### Maintenance Workflows
-
-- **CodeQL Analysis**: Security scanning on pushes/PRs
-- **Update Known Versions**: Daily job to sync with latest uv releases
-- **Dependabot**: Automated dependency updates
-
-### Pre-commit Validation
-
-The CI runs these checks that you should run locally:
-1. `npm run all` - Complete build and test suite
-2. ActionLint - GitHub Actions workflow validation
-3. Change detection - Ensures no uncommitted build artifacts
-
-## Key Configuration Files
-
-### Action Configuration (`action.yml`)
-
-Defines 20+ inputs including version specifications,
-cache settings, tool directories, and environment options.
-This file is the authoritative source for understanding available action parameters.
-
-### TypeScript Configuration (`tsconfig.json`)
-
-- Target: ES2024
-- Module: nodenext (Node.js modules)
-- Strict mode enabled
-- Output directory: `lib/`
-
-### Linting Configuration (`biome.json`)
-
-- Formatter and linter combined
-- Enforces consistent code style
-- Automatically organizes imports and sorts object keys
-
-## Common Development Patterns
-
-### Making Code Changes
-
-1. Edit TypeScript source files in `src/`
-2. Run `npm run build` to compile
-3. Run `npm run check` to format and lint
-4. Run `npm run package` to update distribution bundles
-5. Run `npm test` to verify functionality
-6. Commit all changes including `dist/` files
-
-### Adding New Features
-
-- Follow existing patterns in `src/utils/inputs.ts` for new action inputs
-- Update `action.yml` to declare new inputs/outputs
-- Add corresponding tests in `__tests__/`
-- Add a test in `.github/workflows/test.yml` if it affects integration
-- Update README.md with usage examples
-
-### Cache-Related Changes
-
-- Cache logic is complex and affects performance significantly
-- Test with multiple cache scenarios (hit, miss, invalidation)
-- Consider impact on both GitHub-hosted and self-hosted runners
-- Validate cache key generation and dependency detection
-
-### Version Resolution Changes
-
-- Version resolution supports multiple file formats and precedence rules
-- Test with fixtures in `__tests__/fixtures/`
-- Consider backward compatibility with existing projects
-- Validate semver and PEP 440 specification handling
-
-## Troubleshooting
-
-### Build Failures
-
-- **"Module not found"**: Run `npm install` to ensure dependencies are installed
-- **TypeScript errors**: Check `tsconfig.json` and ensure all imports are valid
-- **Test failures**: Check if test fixtures have been modified or if logic changes broke assumptions
-
-### Action Failures in Workflows
-
-- **Changes not taking effect**: Ensure `npm run package` was run and `dist/` files committed
-- **Version resolution issues**: Check version specification format and file existence
-- **Cache problems**: Verify cache key generation and dependency glob patterns
-
-### Common Gotchas
-
-- **Forgetting to package**: Code changes won't work without running `npm run package`
-- **Platform differences**: Windows paths use backslashes, test cross-platform behavior
-- **Cache invalidation**: Cache keys are sensitive to dependency file changes
-- **Tool directory permissions**: Some platforms require specific directory setups
-
-## Trust These Instructions
-
-These instructions are comprehensive and current. Only search for additional information if:
-- You encounter specific error messages not covered here
-- You need to understand implementation details of specific functions
-- The instructions appear outdated (check repository commit history)
-
-For most development tasks, following the build process and development patterns outlined above will be sufficient.

.github/dependabot.yml

@@ -4,8 +4,12 @@ updates:
     directory: /
     schedule:
       interval: daily
+    cooldown:
+      default-days: 7
 
   - package-ecosystem: npm
     directory: /
     schedule:
       interval: daily
+    cooldown:
+      default-days: 7

.github/release-drafter.yml

@@ -19,7 +19,7 @@ categories:
     labels:
       - "maintenance"
       - "ci"
-      - "update-known-versions"
+      - "update-known-checksums"
   - title: "📚 Documentation"
     labels:
       - "documentation"

.github/workflows/codeql-analysis.yml

@@ -41,13 +41,13 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
 
       # Initializes the CodeQL tools for scanning.
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@f443b600d91635bebf5b0d9ebc620189c0d6fba5 # v4.30.8
+        uses: github/codeql-action/init@45cbd0c69e560cd9e7cd7f8c32362050c9b7ded2 # v4.32.2
         with:
           languages: ${{ matrix.language }}
           source-root: src
@@ -59,7 +59,7 @@ jobs:
       # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
       # If this step fails, then you should remove it and run the build manually (see below)
       - name: Autobuild
-        uses: github/codeql-action/autobuild@f443b600d91635bebf5b0d9ebc620189c0d6fba5 # v4.30.8
+        uses: github/codeql-action/autobuild@45cbd0c69e560cd9e7cd7f8c32362050c9b7ded2 # v4.32.2
 
       # ℹ️ Command-line programs to run using the OS shell.
       # 📚 https://git.io/JvXDl
@@ -73,4 +73,4 @@ jobs:
       #   make release
 
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@f443b600d91635bebf5b0d9ebc620189c0d6fba5 # v4.30.8
+        uses: github/codeql-action/analyze@45cbd0c69e560cd9e7cd7f8c32362050c9b7ded2 # v4.32.2

.github/workflows/release-drafter.yml

@@ -19,6 +19,6 @@ jobs:
       pull-requests: read
     steps:
       - name: 🚀 Run Release Drafter
-        uses: release-drafter/release-drafter@b1476f6e6eb133afa41ed8589daba6dc69b4d3f5 # v6.1.0
+        uses: release-drafter/release-drafter@6db134d15f3909ccc9eefd369f02bd1e9cffdf97 # v6.2.0
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/test.yml

@@ -21,18 +21,19 @@ jobs:
     permissions:
       security-events: write # for zizmor
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Actionlint
-        uses: eifinger/actionlint-action@03ff1f78c0670b71017616a37170f327df932030 # v1.9.2
+        uses: eifinger/actionlint-action@7802e0cc3ab3f81cbffb36fb0bf1a3621d994b89 # v1.10.1
       - name: Run zizmor
-        uses: zizmorcore/zizmor-action@e673c3917a1aef3c65c972347ed84ccd013ecda4 # v0.2.0
-      - uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6.0.0
+        uses: zizmorcore/zizmor-action@0dce2577a4760a2749d8cfb7a84b7d5585ebcb7d # v0.5.0
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
-          node-version: "24"
+          node-version-file: .nvmrc
+          cache: npm
       - run: |
-          npm install
+          npm ci --ignore-scripts
       - run: |
           npm run all
       - name: Check all jobs are in all-tests-passed.needs
@@ -50,7 +51,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest, macos-14, windows-latest]
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Install latest version
@@ -75,7 +76,7 @@ jobs:
   test-uv-no-modify-path:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Install with UV_NO_MODIFY_PATH set
@@ -124,7 +125,7 @@ jobs:
             expected-version: "0.1.0"
             resolution-strategy: "lowest"
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Install version ${{ matrix.input.version-input }} with strategy ${{ matrix.input.resolution-strategy || 'highest' }}
@@ -153,7 +154,7 @@ jobs:
       matrix:
         version-input: ["latest", ">=0.8"]
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Install version ${{ matrix.version-input }}
@@ -181,7 +182,7 @@ jobs:
           - working-directory: "__tests__/fixtures/uv-toml-project"
             expected-version: "0.5.15"
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Install version from ${{ matrix.input.working-directory }}
@@ -207,7 +208,7 @@ jobs:
           - version-file: "__tests__/fixtures/.tool-versions"
             expected-version: "0.5.15"
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Install version from ${{ matrix.input.version-file }}
@@ -224,7 +225,7 @@ jobs:
   test-malformed-pyproject-file-fallback:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Install using malformed pyproject.toml
@@ -244,7 +245,7 @@ jobs:
           - os: macos-latest
             checksum: "a70cbfbf3bb5c08b2f84963b4f12c94e08fbb2468ba418a3bfe1066fbe9e7218"
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Checksum matches expected
@@ -258,7 +259,7 @@ jobs:
   test-with-explicit-token:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Install default version
@@ -271,7 +272,7 @@ jobs:
   test-uvx:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Install default version
@@ -284,7 +285,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest, macos-14, windows-latest]
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Install default version
@@ -292,38 +293,17 @@ jobs:
       - run: uv tool install ruff
       - run: ruff --version
 
-  test-tilde-expansion-tool-dirs:
-    runs-on: selfhosted-ubuntu-arm64
-    steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-        with:
-          persist-credentials: false
-      - name: Setup with cache
-        uses: ./
-        with:
-          tool-bin-dir: "~/tool-bin-dir"
-          tool-dir: "~/tool-dir"
-      - name: "Check if tool dirs are expanded"
-        run: |
-          if ! echo "$PATH" | grep -q "/home/ubuntu/tool-bin-dir"; then
-              echo "PATH does not contain /home/ubuntu/tool-bin-dir: $PATH"
-              exit 1
-          fi
-          if [ "$UV_TOOL_DIR" != "/home/ubuntu/tool-dir" ]; then
-              echo "UV_TOOL_DIR does not contain /home/ubuntu/tool-dir: $UV_TOOL_DIR"
-              exit 1
-          fi
-
   test-python-version:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Install latest version
+        id: setup-uv
         uses: ./
         with:
           python-version: 3.13.1t
@@ -334,6 +314,14 @@ jobs:
             exit 1
           fi
         shell: bash
+      - name: Verify output python-version is correct
+        run: |
+          if [ "$PYTHON_VERSION" != "3.13.1t" ]; then
+            exit 1
+          fi
+        shell: bash
+        env:
+          PYTHON_VERSION: ${{ steps.setup-uv.outputs.python-version }}
       - run: uv sync
         working-directory: __tests__/fixtures/uv-project
 
@@ -343,7 +331,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Install latest version
@@ -376,26 +364,144 @@ jobs:
         env:
           UV_VENV: ${{ steps.setup-uv.outputs.venv }}
 
-  test-musl:
-    runs-on: ubuntu-latest
-    container: alpine
+  test-activate-environment-custom-path:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+      - name: Install latest version
+        id: setup-uv
+        uses: ./
+        with:
+          python-version: 3.13.1t
+          activate-environment: true
+          venv-path: ${{ runner.temp }}/custom-venv
+      - name: Verify VIRTUAL_ENV matches output
+        run: |
+          if [ "$VIRTUAL_ENV" != "$UV_VENV" ]; then
+            echo "VIRTUAL_ENV does not match venv output: $VIRTUAL_ENV vs $UV_VENV"
+            exit 1
+          fi
+        shell: bash
+        env:
+          UV_VENV: ${{ steps.setup-uv.outputs.venv }}
+      - name: Verify venv location is runner.temp/custom-venv
+        run: |
+          python - <<'PY'
+          import os
+          from pathlib import Path
+
+          venv = Path(os.environ["VIRTUAL_ENV"]).resolve()
+          temp = Path(os.environ["RUNNER_TEMP"]).resolve()
+
+          if venv.name != "custom-venv":
+              raise SystemExit(f"Expected venv name 'custom-venv', got: {venv}")
+          if venv.parent != temp:
+              raise SystemExit(f"Expected venv under {temp}, got: {venv}")
+          if not venv.is_dir():
+              raise SystemExit(f"Venv directory does not exist: {venv}")
+          PY
+        shell: bash
+      - name: Verify packages can be installed
+        run: uv pip install pip
+        shell: bash
+      - name: Verify python runs from custom venv
+        run: |
+          python - <<'PY'
+          import sys
+          if "custom-venv" not in sys.executable:
+              raise SystemExit(f"Python is not running from custom venv: {sys.executable}")
+          PY
+        shell: bash
+
+  test-debian-unstable:
+    runs-on: ubuntu-latest
+    container: debian:unstable
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Install latest version
         uses: ./
+        with:
+          enable-cache: true
       - run: uv sync
         working-directory: __tests__/fixtures/uv-project
 
+  test-musl:
+    runs-on: ubuntu-latest
+    container: alpine
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+      - name: Install latest version
+        id: setup-uv
+        uses: ./
+        with:
+          enable-cache: true
+      - name: Verify cache key contains alpine
+        run: |
+          echo "Cache key: $CACHE_KEY"
+          if echo "$CACHE_KEY" | grep -qv "alpine"; then
+            echo "Cache key does not contain 'alpine'"
+            exit 1
+          fi
+        shell: sh
+        env:
+          CACHE_KEY: ${{ steps.setup-uv.outputs.cache-key }}
+      - run: uv sync
+        working-directory: __tests__/fixtures/uv-project
+
+  test-cache-key-os-version:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        include:
+          - os: ubuntu-22.04
+            expected-os: "ubuntu-22.04"
+          - os: ubuntu-24.04
+            expected-os: "ubuntu-24.04"
+          - os: macos-14
+            expected-os: "macos-14"
+          - os: macos-15
+            expected-os: "macos-15"
+          - os: windows-2022
+            expected-os: "windows-2022"
+          - os: windows-2025
+            expected-os: "windows-2025"
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+      - name: Setup uv
+        id: setup-uv
+        uses: ./
+        with:
+          enable-cache: true
+      - name: Verify cache key contains OS version
+        run: |
+          echo "Cache key: $CACHE_KEY"
+          if [[ "$CACHE_KEY" != *"${{ matrix.expected-os }}"* ]]; then
+            echo "Cache key does not contain expected OS version: ${{ matrix.expected-os }}"
+            exit 1
+          fi
+        shell: bash
+        env:
+          CACHE_KEY: ${{ steps.setup-uv.outputs.cache-key }}
+
   test-setup-cache:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
         enable-cache: ["true", "false", "auto"]
-        os: ["ubuntu-latest", "selfhosted-ubuntu-arm64", "windows-latest"]
+        os: ["ubuntu-latest", "windows-latest"]
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Setup with cache
@@ -411,10 +517,10 @@ jobs:
     strategy:
       matrix:
         enable-cache: ["true", "false", "auto"]
-        os: ["ubuntu-latest", "selfhosted-ubuntu-arm64", "windows-latest"]
+        os: ["ubuntu-latest", "windows-latest"]
     needs: test-setup-cache
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Restore with cache
@@ -433,7 +539,7 @@ jobs:
           CACHE_HIT: ${{ steps.restore.outputs.cache-hit }}
         shell: bash
       - name: Cache was not hit
-        if: ${{ matrix.enable-cache == 'false' || (matrix.enable-cache == 'auto' && matrix.os == 'selfhosted-ubuntu-arm64') }}
+        if: ${{ matrix.enable-cache == 'false' }}
         run: |
           if [ "$CACHE_HIT" == "true" ]; then
             exit 1
@@ -448,7 +554,7 @@ jobs:
   test-setup-cache-requirements-txt:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Setup with cache
@@ -464,7 +570,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: test-setup-cache-requirements-txt
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Restore with cache
@@ -488,7 +594,7 @@ jobs:
   test-setup-cache-dependency-glob:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Setup with cache
@@ -505,7 +611,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: test-setup-cache-dependency-glob
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Change pyproject.toml
@@ -533,7 +639,7 @@ jobs:
   test-setup-cache-save-cache-false:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Setup with cache
@@ -549,7 +655,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: test-setup-cache-save-cache-false
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Restore with cache
@@ -569,7 +675,7 @@ jobs:
   test-setup-cache-restore-cache-false:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Setup with cache
@@ -584,7 +690,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: test-setup-cache-restore-cache-false
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Restore with cache
@@ -610,11 +716,9 @@ jobs:
             expected-cache-dir: "/home/runner/work/_temp/setup-uv-cache"
           - os: windows-latest
             expected-cache-dir: "D:\\a\\_temp\\setup-uv-cache"
-          - os: selfhosted-ubuntu-arm64
-            expected-cache-dir: "/home/ubuntu/.cache/uv"
     runs-on: ${{ matrix.inputs.os }}
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Setup with cache
@@ -632,7 +736,7 @@ jobs:
   test-cache-local-cache-disabled:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Setup without cache
@@ -648,99 +752,30 @@ jobs:
           fi
         shell: bash
 
-  test-setup-cache-local:
-    runs-on: selfhosted-ubuntu-arm64
+  test-cache-local-cache-disabled-but-explicit-path:
+    runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
-      - name: Setup with cache
+      - name: Setup without cache
         uses: ./
         with:
-          enable-cache: true
-          cache-suffix: ${{ github.run_id }}-${{ github.run_attempt }}-test-setup-cache-local
-          cache-local-path: /tmp/uv-cache
-      - run: uv sync
-        working-directory: __tests__/fixtures/uv-project
-  test-restore-cache-local:
-    runs-on: selfhosted-ubuntu-arm64
-    needs: test-setup-cache-local
-    steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-        with:
-          persist-credentials: false
-      - name: Restore with cache
-        id: restore
-        uses: ./
-        with:
-          enable-cache: true
-          cache-suffix: ${{ github.run_id }}-${{ github.run_attempt }}-test-setup-cache-local
-          cache-local-path: /tmp/uv-cache
-      - name: Cache was hit
+          enable-cache: false
+          cache-local-path: /tmp/uv-cache-disabled
+
+      - name: Check UV_CACHE_DIR is set
         run: |
-          if [ "$CACHE_HIT" != "true" ]; then
+          if [ "$UV_CACHE_DIR" != "/tmp/uv-cache-disabled" ]; then
+            echo "UV_CACHE_DIR should be set when cache is disabled but explicit path is provided"
             exit 1
           fi
-        env:
-          CACHE_HIT: ${{ steps.restore.outputs.cache-hit }}
-      - run: uv sync
-        working-directory: __tests__/fixtures/uv-project
-
-  test-tilde-expansion-cache-local-path:
-    runs-on: selfhosted-ubuntu-arm64
-    steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-        with:
-          persist-credentials: false
-      - name: Create cache directory
-        run: mkdir -p ~/uv-cache
-        shell: bash
-      - name: Setup with cache
-        uses: ./
-        with:
-          cache-local-path: ~/uv-cache/cache-local-path
-      - run: uv sync
-        working-directory: __tests__/fixtures/uv-project
-
-  test-tilde-expansion-cache-dependency-glob:
-    runs-on: selfhosted-ubuntu-arm64
-    steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-        with:
-          persist-credentials: false
-      - name: Create cache directory
-        run: mkdir -p ~/uv-cache
-        shell: bash
-      - name: Create cache dependency glob file
-        run: touch ~/uv-cache.glob
-        shell: bash
-      - name: Setup with cache
-        uses: ./
-        with:
-          enable-cache: true
-          cache-local-path: ~/uv-cache/cache-dependency-glob
-          cache-dependency-glob: "~/uv-cache.glob"
-      - run: uv sync
-        working-directory: __tests__/fixtures/uv-project
-
-  cleanup-tilde-expansion-tests:
-    needs:
-      - test-tilde-expansion-cache-local-path
-      - test-tilde-expansion-cache-dependency-glob
-    if: always()
-    runs-on: selfhosted-ubuntu-arm64
-    steps:
-      - name: Remove cache directory
-        run: rm -rf ~/uv-cache
-        shell: bash
-      - name: Remove cache dependency glob file
-        run: rm -f ~/uv-cache.glob
         shell: bash
 
   test-no-python-version:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Fake pyproject.toml at root
@@ -755,13 +790,13 @@ jobs:
   test-custom-manifest-file:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Install from custom manifest file
         uses: ./
         with:
-          manifest-file: "https://raw.githubusercontent.com/astral-sh/setup-uv/main/__tests__/download/custom-manifest.json"
+          manifest-file: "https://raw.githubusercontent.com/astral-sh/setup-uv/${{ github.ref }}/__tests__/download/custom-manifest.json"
       - run: uv sync
         working-directory: __tests__/fixtures/uv-project
       - name: Correct version gets installed
@@ -774,7 +809,7 @@ jobs:
   test-absolute-path:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Create requirements.txt
@@ -794,7 +829,7 @@ jobs:
   test-relative-path:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: mkdir
@@ -818,7 +853,7 @@ jobs:
   test-cache-prune-force:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Setup uv
@@ -835,7 +870,7 @@ jobs:
   test-cache-dir-from-file:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Verify uv cache dir is not populated
@@ -857,10 +892,33 @@ jobs:
             exit 1
           fi
 
+  test-cache-python-missing-managed-install-dir:
+    runs-on: ubuntu-latest
+    env:
+      UV_PYTHON_INSTALL_DIR: /tmp/missing-uv-python
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+      - name: Setup uv with cache and python cache enabled
+        uses: ./
+        with:
+          enable-cache: true
+          cache-python: true
+          python-version: "3.12"
+          cache-local-path: /tmp/setup-uv-cache
+          cache-suffix: ${{ github.run_id }}-${{ github.run_attempt }}-test-cache-python-missing-managed-install-dir
+      - name: Ensure uv cache dir exists so only python-cache behavior is tested
+        run: uv sync
+        working-directory: __tests__/fixtures/uv-project
+        shell: bash
+      - name: Ensure managed Python install dir does not exist and this does not break caching
+        run: rm -rf "$UV_PYTHON_INSTALL_DIR"
+
   test-cache-python-installs:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Verify Python install dir is not populated
@@ -887,7 +945,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: test-cache-python-installs
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Verify Python install dir does not exist
@@ -915,7 +973,7 @@ jobs:
             exit 1
           fi
         env:
-          CACHE_HIT: ${{ steps.restore.outputs.cache-hit }}
+          CACHE_HIT: ${{ steps.restore.outputs.python-cache-hit }}
       - run: uv sync --managed-python
         working-directory: __tests__/fixtures/uv-project
 
@@ -927,11 +985,9 @@ jobs:
             expected-python-dir: "/home/runner/work/_temp/uv-python-dir"
           - os: windows-latest
             expected-python-dir: "D:\\a\\_temp\\uv-python-dir"
-          - os: selfhosted-ubuntu-arm64
-            expected-python-dir: "/home/ubuntu/.local/share/uv/python"
     runs-on: ${{ matrix.inputs.os }}
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Install latest version
@@ -947,6 +1003,30 @@ jobs:
       - name: Install python works
         run: uv python install
 
+  test-act:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+      - name: Install act
+        run: gh extension install https://github.com/nektos/gh-act
+        env:
+          GH_TOKEN: ${{ github.token }}
+      - name: Run test-uvx with act
+        run: gh act -j test-uvx -P ubuntu-latest=catthehacker/ubuntu:act-latest
+        env:
+          GH_TOKEN: ${{ github.token }}
+
+  validate-typings:
+    runs-on: "ubuntu-latest"
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+      - name: Validate typings
+        uses: typesafegithub/github-actions-typing@9ddf35b71a482be7d8922b28e8d00df16b77e315 # v2.2.2
+
   all-tests-passed:
     runs-on: ubuntu-latest
     needs:
@@ -962,12 +1042,15 @@ jobs:
       - test-with-explicit-token
       - test-uvx
       - test-tool-install
-      - test-tilde-expansion-tool-dirs
       - test-python-version
       - test-activate-environment
+      - test-activate-environment-custom-path
+      - test-debian-unstable
       - test-musl
+      - test-cache-key-os-version
       - test-cache-local
       - test-cache-local-cache-disabled
+      - test-cache-local-cache-disabled-but-explicit-path
       - test-setup-cache
       - test-restore-cache
       - test-setup-cache-requirements-txt
@@ -978,20 +1061,18 @@ jobs:
       - test-restore-cache-save-cache-false
       - test-setup-cache-restore-cache-false
       - test-restore-cache-restore-cache-false
-      - test-setup-cache-local
-      - test-restore-cache-local
-      - test-tilde-expansion-cache-local-path
-      - test-tilde-expansion-cache-dependency-glob
-      - cleanup-tilde-expansion-tests
       - test-no-python-version
       - test-custom-manifest-file
       - test-absolute-path
       - test-relative-path
       - test-cache-prune-force
       - test-cache-dir-from-file
+      - test-cache-python-missing-managed-install-dir
       - test-cache-python-installs
       - test-restore-python-installs
       - test-python-install-dir
+      - test-act
+      - validate-typings
     if: always()
     steps:
       - name: All tests passed

.github/workflows/update-known-checksums.yml

@@ -1,4 +1,4 @@
-name: "Update known versions"
+name: "Update known checksums"
 on:
   workflow_dispatch:
   schedule:
@@ -15,19 +15,17 @@ jobs:
       contents: write
       pull-requests: write
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: true
-      - uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6.0.0
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: "20"
-      - name: Update known versions
-        id: update-known-versions
+      - name: Update known checksums
+        id: update-known-checksums
         run:
-          node dist/update-known-versions/index.js
+          node dist/update-known-checksums/index.js
           src/download/checksum/known-checksums.ts
-          version-manifest.json
-          ${{ secrets.GITHUB_TOKEN }}
       - name: Check for changes
         id: changes-exist
         run: |
@@ -39,7 +37,7 @@ jobs:
           fi
       - name: Compile changes
         if: ${{ steps.changes-exist.outputs.changes-exist == 'true' }}
-        run: npm ci && npm run all
+        run: npm ci --ignore-scripts && npm run all
       - name: Commit and push changes
         if: ${{ steps.changes-exist.outputs.changes-exist == 'true' }}
         id: commit-and-push
@@ -48,23 +46,23 @@ jobs:
           git config user.name "$GITHUB_ACTOR"
           git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
           git add .
-          git commit -m "chore: update known versions for $LATEST_VERSION"
+          git commit -m "chore: update known checksums for $LATEST_VERSION"
           git push origin HEAD:refs/heads/main
         env:
-          LATEST_VERSION: ${{ steps.update-known-versions.outputs.latest-version }}
+          LATEST_VERSION: ${{ steps.update-known-checksums.outputs.latest-version }}
 
       - name: Create Pull Request
         if: ${{ steps.changes-exist.outputs.changes-exist == 'true' && steps.commit-and-push.outcome != 'success' }}
-        uses: peter-evans/create-pull-request@271a8d0340265f705b14b6d32b9829c1cb33d45e # v7.0.8
+        uses: peter-evans/create-pull-request@c0f553fe549906ede9cf27b5156039d195d2ece0 # v8.1.0
         with:
           commit-message: "chore: update known checksums"
           title:
             "chore: update known checksums for ${{
-            steps.update-known-versions.outputs.latest-version }}"
+            steps.update-known-checksums.outputs.latest-version }}"
           body:
             "chore: update known checksums for ${{
-            steps.update-known-versions.outputs.latest-version }}"
+            steps.update-known-checksums.outputs.latest-version }}"
           base: main
-          labels: "automated-pr,update-known-versions"
-          branch: update-known-versions-pr
+          labels: "automated-pr,update-known-checksums"
+          branch: update-known-checksums-pr
           delete-branch: true

.github/workflows/update-major-minor-tags.yml

@@ -17,7 +17,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: true # needed for git push below
       - name: Update Major Minor Tags

.nvmrc

@@ -0,0 +1 @@
+24

AGENTS.md

@@ -0,0 +1,13 @@
+# setup-uv agent notes
+
+This repository is a TypeScript-based GitHub Action for installing `uv` in GitHub Actions workflows. It also supports restoring/saving the `uv` cache and optional managed-Python caching.
+
+- The published action runs the committed bundles in `dist/`, not the TypeScript in `src/`. After any code change, run `npm run package` and commit the resulting `dist/` updates.
+- Standard local validation is:
+  1. `npm ci --ignore-scripts`
+  2. `npm run all`
+- `npm run check` uses Biome (not ESLint/Prettier) and rewrites files in place.
+- User-facing changes are usually multi-file changes. If you add or change inputs, outputs, or behavior, update `action.yml`, the implementation in `src/`, tests in `__tests__/`, relevant docs/README, and then re-package.
+- The easiest areas to regress are version resolution and caching. When touching them, add or update tests for precedence, cache invalidation, and cross-platform path behavior.
+- Workflow edits have extra CI-only checks (`actionlint` and `zizmor`); `npm run all` does not cover them.
+- Before finishing, make sure validation does not leave generated or formatting-only diffs behind.

README.md

@@ -59,13 +59,16 @@ Have a look under [Advanced Configuration](#advanced-configuration) for detailed
     # Use uv venv to activate a venv ready to be used by later steps
     activate-environment: "false"
 
+    # Custom path for the virtual environment when using activate-environment (default: .venv in the working directory)
+    venv-path: ""
+
     # The directory to execute all commands in and look for files such as pyproject.toml
     working-directory: ""
 
     # The checksum of the uv version to install
     checksum: ""
 
-    # Used to increase the rate limit when retrieving versions and downloading uv
+    # Used when downloading uv from GitHub releases
     github-token: ${{ github.token }}
 
     # Enable uploading of the uv cache: true, false, or auto (enabled on GitHub-hosted runners, disabled on self-hosted runners)
@@ -111,7 +114,7 @@ Have a look under [Advanced Configuration](#advanced-configuration) for detailed
     # Custom path to set UV_TOOL_BIN_DIR to
     tool-bin-dir: ""
 
-    # URL to the manifest file containing available versions and download URLs
+    # URL to a custom manifest file (NDJSON preferred, legacy JSON array is deprecated)
     manifest-file: ""
 
     # Add problem matchers
@@ -125,6 +128,8 @@ Have a look under [Advanced Configuration](#advanced-configuration) for detailed
 - `uvx-path`: The path to the installed uvx binary.
 - `cache-hit`: A boolean value to indicate a cache entry was found.
 - `venv`: Path to the activated venv if activate-environment is true.
+- `python-version`: The Python version that was set.
+- `python-cache-hit`: A boolean value to indicate the Python cache entry was found.
 
 ### Python version
 
@@ -165,7 +170,7 @@ You can set the working directory with the `working-directory` input.
 This controls where we look for `pyproject.toml`, `uv.toml` and `.python-version` files
 which are used to determine the version of uv and python to install.
 
-It also controls where [the venv gets created](#activate-environment).
+It also controls where [the venv gets created](#activate-environment), unless `venv-path` is set.
 
 ```yaml
 - name: Install uv based on the config files in the working-directory
@@ -185,10 +190,12 @@ For more advanced configuration options, see our detailed documentation:
 
 ## How it works
 
-This action downloads uv from the uv repo's official
-[GitHub Releases](https://github.com/astral-sh/uv) and uses the
-[GitHub Actions Toolkit](https://github.com/actions/toolkit) to cache it as a tool to speed up
-consecutive runs on self-hosted runners.
+By default, this action resolves uv versions from
+[`astral-sh/versions`](https://github.com/astral-sh/versions) (NDJSON) and downloads uv from the
+official [GitHub Releases](https://github.com/astral-sh/uv).
+
+It then uses the [GitHub Actions Toolkit](https://github.com/actions/toolkit) to cache uv as a
+tool to speed up consecutive runs on self-hosted runners.
 
 The installed version of uv is then added to the runner PATH, enabling later steps to invoke it
 by name (`uv`).
@@ -200,7 +207,8 @@ by name (`uv`).
 With `setup-uv`, you can install a specific version of Python using `uv python install` rather than
 relying on `actions/setup-python`.
 
-Using `actions/setup-python` can be faster, because GitHub caches the Python versions alongside the runner.
+Using `actions/setup-python` can be faster (~1s), because GitHub includes several Python versions in the runner image
+which are available to get activated by `actions/setup-python` without having to download them.
 
 For example:
 
@@ -273,7 +281,7 @@ the cache will not be found and the warning `No GitHub Actions cache found for k
 While this might be irritating at first, it is expected behaviour and the cache will be created
 and reused in later workflows.
 
-The reason for the warning is, that we have to way to know if this is the first run of a new
+The reason for the warning is that we have to way to know if this is the first run of a new
 cache key or the user accidentally misconfigured the cache-dependency-glob
 or cache-suffix (see [Caching documentation](docs/caching.md)) and the cache never gets used.
 
@@ -286,7 +294,7 @@ Running `actions/checkout` after `setup-uv` **is not supported**.
 
 ### Does `setup-uv` also install my project or its dependencies automatically?
 
-No, `setup-uv` alone wont install any libraries from your `pyproject.toml` or `requirements.txt`, it only sets up `uv`.
+No, `setup-uv` alone won't install any libraries from your `pyproject.toml` or `requirements.txt`, it only sets up `uv`.
 You should run `uv sync` or `uv pip install .` separately, or use `uv run ...` to ensure necessary dependencies are installed.
 
 ### Why is a changed cache not detected and not the full cache uploaded?

__tests__/download/checksum/checksum.test.ts

@@ -4,10 +4,11 @@ import {
   validateChecksum,
 } from "../../../src/download/checksum/checksum";
 
+const validChecksum =
+  "f3da96ec7e995debee7f5d52ecd034dfb7074309a1da42f76429ecb814d813a3";
+const filePath = "__tests__/fixtures/checksumfile";
+
 test("checksum should match", async () => {
-  const validChecksum =
-    "f3da96ec7e995debee7f5d52ecd034dfb7074309a1da42f76429ecb814d813a3";
-  const filePath = "__tests__/fixtures/checksumfile";
   // string params don't matter only test the checksum mechanism, not known checksums
   await validateChecksum(
     validChecksum,
@@ -18,6 +19,16 @@ test("checksum should match", async () => {
   );
 });
 
+test("provided checksum beats known checksums", async () => {
+  await validateChecksum(
+    validChecksum,
+    filePath,
+    "x86_64",
+    "unknown-linux-gnu",
+    "0.3.0",
+  );
+});
+
 type KnownVersionFixture = { version: string; known: boolean };
 
 it.each<KnownVersionFixture>([
@@ -29,9 +40,9 @@ it.each<KnownVersionFixture>([
     known: false,
     version: "0.0.15",
   },
-])(
-  "isknownVersion should return $known for version $version",
-  ({ version, known }) => {
-    expect(isknownVersion(version)).toBe(known);
-  },
-);
+])("isknownVersion should return $known for version $version", ({
+  version,
+  known,
+}) => {
+  expect(isknownVersion(version)).toBe(known);
+});

__tests__/download/download-version.test.ts

@@ -0,0 +1,256 @@
+import { beforeEach, describe, expect, it, jest } from "@jest/globals";
+
+const mockInfo = jest.fn();
+const mockWarning = jest.fn();
+
+jest.mock("@actions/core", () => ({
+  debug: jest.fn(),
+  info: mockInfo,
+  warning: mockWarning,
+}));
+
+// biome-ignore lint/suspicious/noExplicitAny: Mock requires flexible typing in tests.
+const mockDownloadTool = jest.fn<any>();
+// biome-ignore lint/suspicious/noExplicitAny: Mock requires flexible typing in tests.
+const mockExtractTar = jest.fn<any>();
+// biome-ignore lint/suspicious/noExplicitAny: Mock requires flexible typing in tests.
+const mockExtractZip = jest.fn<any>();
+// biome-ignore lint/suspicious/noExplicitAny: Mock requires flexible typing in tests.
+const mockCacheDir = jest.fn<any>();
+
+jest.mock("@actions/tool-cache", () => {
+  const actual = jest.requireActual("@actions/tool-cache") as Record<
+    string,
+    unknown
+  >;
+
+  return {
+    ...actual,
+    cacheDir: mockCacheDir,
+    downloadTool: mockDownloadTool,
+    extractTar: mockExtractTar,
+    extractZip: mockExtractZip,
+  };
+});
+
+// biome-ignore lint/suspicious/noExplicitAny: Mock requires flexible typing in tests.
+const mockGetLatestVersionFromNdjson = jest.fn<any>();
+// biome-ignore lint/suspicious/noExplicitAny: Mock requires flexible typing in tests.
+const mockGetAllVersionsFromNdjson = jest.fn<any>();
+// biome-ignore lint/suspicious/noExplicitAny: Mock requires flexible typing in tests.
+const mockGetArtifactFromNdjson = jest.fn<any>();
+
+jest.mock("../../src/download/versions-client", () => ({
+  getAllVersions: mockGetAllVersionsFromNdjson,
+  getArtifact: mockGetArtifactFromNdjson,
+  getLatestVersion: mockGetLatestVersionFromNdjson,
+}));
+
+// biome-ignore lint/suspicious/noExplicitAny: Mock requires flexible typing in tests.
+const mockGetAllManifestVersions = jest.fn<any>();
+// biome-ignore lint/suspicious/noExplicitAny: Mock requires flexible typing in tests.
+const mockGetLatestVersionInManifest = jest.fn<any>();
+// biome-ignore lint/suspicious/noExplicitAny: Mock requires flexible typing in tests.
+const mockGetManifestArtifact = jest.fn<any>();
+
+jest.mock("../../src/download/version-manifest", () => ({
+  getAllVersions: mockGetAllManifestVersions,
+  getLatestKnownVersion: mockGetLatestVersionInManifest,
+  getManifestArtifact: mockGetManifestArtifact,
+}));
+
+// biome-ignore lint/suspicious/noExplicitAny: Mock requires flexible typing in tests.
+const mockValidateChecksum = jest.fn<any>();
+
+jest.mock("../../src/download/checksum/checksum", () => ({
+  validateChecksum: mockValidateChecksum,
+}));
+
+import {
+  downloadVersionFromManifest,
+  downloadVersionFromNdjson,
+  resolveVersion,
+} from "../../src/download/download-version";
+
+describe("download-version", () => {
+  beforeEach(() => {
+    mockInfo.mockReset();
+    mockWarning.mockReset();
+    mockDownloadTool.mockReset();
+    mockExtractTar.mockReset();
+    mockExtractZip.mockReset();
+    mockCacheDir.mockReset();
+    mockGetLatestVersionFromNdjson.mockReset();
+    mockGetAllVersionsFromNdjson.mockReset();
+    mockGetArtifactFromNdjson.mockReset();
+    mockGetAllManifestVersions.mockReset();
+    mockGetLatestVersionInManifest.mockReset();
+    mockGetManifestArtifact.mockReset();
+    mockValidateChecksum.mockReset();
+
+    mockDownloadTool.mockResolvedValue("/tmp/downloaded");
+    mockExtractTar.mockResolvedValue("/tmp/extracted");
+    mockExtractZip.mockResolvedValue("/tmp/extracted");
+    mockCacheDir.mockResolvedValue("/tmp/cached");
+  });
+
+  describe("resolveVersion", () => {
+    it("uses astral-sh/versions to resolve latest", async () => {
+      mockGetLatestVersionFromNdjson.mockResolvedValue("0.9.26");
+
+      const version = await resolveVersion("latest", undefined);
+
+      expect(version).toBe("0.9.26");
+      expect(mockGetLatestVersionFromNdjson).toHaveBeenCalledTimes(1);
+    });
+
+    it("uses astral-sh/versions to resolve available versions", async () => {
+      mockGetAllVersionsFromNdjson.mockResolvedValue(["0.9.26", "0.9.25"]);
+
+      const version = await resolveVersion("^0.9.0", undefined);
+
+      expect(version).toBe("0.9.26");
+      expect(mockGetAllVersionsFromNdjson).toHaveBeenCalledTimes(1);
+    });
+
+    it("does not fall back when astral-sh/versions fails", async () => {
+      mockGetLatestVersionFromNdjson.mockRejectedValue(
+        new Error("NDJSON unavailable"),
+      );
+
+      await expect(resolveVersion("latest", undefined)).rejects.toThrow(
+        "NDJSON unavailable",
+      );
+    });
+
+    it("uses manifest-file when provided", async () => {
+      mockGetAllManifestVersions.mockResolvedValue(["0.9.26", "0.9.25"]);
+
+      const version = await resolveVersion(
+        "^0.9.0",
+        "https://example.com/custom.ndjson",
+      );
+
+      expect(version).toBe("0.9.26");
+      expect(mockGetAllManifestVersions).toHaveBeenCalledWith(
+        "https://example.com/custom.ndjson",
+      );
+    });
+  });
+
+  describe("downloadVersionFromNdjson", () => {
+    it("fails when NDJSON metadata lookup fails", async () => {
+      mockGetArtifactFromNdjson.mockRejectedValue(
+        new Error("NDJSON unavailable"),
+      );
+
+      await expect(
+        downloadVersionFromNdjson(
+          "unknown-linux-gnu",
+          "x86_64",
+          "0.9.26",
+          undefined,
+          "token",
+        ),
+      ).rejects.toThrow("NDJSON unavailable");
+
+      expect(mockDownloadTool).not.toHaveBeenCalled();
+      expect(mockValidateChecksum).not.toHaveBeenCalled();
+    });
+
+    it("fails when no matching artifact exists in NDJSON metadata", async () => {
+      mockGetArtifactFromNdjson.mockResolvedValue(undefined);
+
+      await expect(
+        downloadVersionFromNdjson(
+          "unknown-linux-gnu",
+          "x86_64",
+          "0.9.26",
+          undefined,
+          "token",
+        ),
+      ).rejects.toThrow(
+        "Could not find artifact for version 0.9.26, arch x86_64, platform unknown-linux-gnu in https://raw.githubusercontent.com/astral-sh/versions/main/v1/uv.ndjson .",
+      );
+
+      expect(mockDownloadTool).not.toHaveBeenCalled();
+      expect(mockValidateChecksum).not.toHaveBeenCalled();
+    });
+
+    it("uses built-in checksums for default NDJSON downloads", async () => {
+      mockGetArtifactFromNdjson.mockResolvedValue({
+        archiveFormat: "tar.gz",
+        sha256: "ndjson-checksum-that-should-be-ignored",
+        url: "https://example.com/uv.tar.gz",
+      });
+
+      await downloadVersionFromNdjson(
+        "unknown-linux-gnu",
+        "x86_64",
+        "0.9.26",
+        undefined,
+        "token",
+      );
+
+      expect(mockValidateChecksum).toHaveBeenCalledWith(
+        undefined,
+        "/tmp/downloaded",
+        "x86_64",
+        "unknown-linux-gnu",
+        "0.9.26",
+      );
+    });
+  });
+
+  describe("downloadVersionFromManifest", () => {
+    it("uses manifest-file checksum metadata when checksum input is unset", async () => {
+      mockGetManifestArtifact.mockResolvedValue({
+        archiveFormat: "tar.gz",
+        checksum: "manifest-checksum",
+        downloadUrl: "https://example.com/custom-uv.tar.gz",
+      });
+
+      await downloadVersionFromManifest(
+        "https://example.com/custom.ndjson",
+        "unknown-linux-gnu",
+        "x86_64",
+        "0.9.26",
+        "",
+        "token",
+      );
+
+      expect(mockValidateChecksum).toHaveBeenCalledWith(
+        "manifest-checksum",
+        "/tmp/downloaded",
+        "x86_64",
+        "unknown-linux-gnu",
+        "0.9.26",
+      );
+    });
+
+    it("prefers checksum input over manifest-file checksum metadata", async () => {
+      mockGetManifestArtifact.mockResolvedValue({
+        archiveFormat: "tar.gz",
+        checksum: "manifest-checksum",
+        downloadUrl: "https://example.com/custom-uv.tar.gz",
+      });
+
+      await downloadVersionFromManifest(
+        "https://example.com/custom.ndjson",
+        "unknown-linux-gnu",
+        "x86_64",
+        "0.9.26",
+        "user-checksum",
+        "token",
+      );
+
+      expect(mockValidateChecksum).toHaveBeenCalledWith(
+        "user-checksum",
+        "/tmp/downloaded",
+        "x86_64",
+        "unknown-linux-gnu",
+        "0.9.26",
+      );
+    });
+  });
+});

__tests__/download/version-manifest.test.ts

@@ -0,0 +1,136 @@
+import { beforeEach, describe, expect, it, jest } from "@jest/globals";
+
+const mockWarning = jest.fn();
+
+jest.mock("@actions/core", () => ({
+  debug: jest.fn(),
+  info: jest.fn(),
+  warning: mockWarning,
+}));
+
+// biome-ignore lint/suspicious/noExplicitAny: Mock requires flexible typing in tests.
+const mockFetch = jest.fn<any>();
+jest.mock("../../src/utils/fetch", () => ({
+  fetch: mockFetch,
+}));
+
+import {
+  clearManifestCache,
+  getAllVersions,
+  getLatestKnownVersion,
+  getManifestArtifact,
+} from "../../src/download/version-manifest";
+
+const legacyManifestResponse = JSON.stringify([
+  {
+    arch: "x86_64",
+    artifactName: "uv-x86_64-unknown-linux-gnu.tar.gz",
+    downloadUrl:
+      "https://example.com/releases/download/0.7.12-alpha.1/uv-x86_64-unknown-linux-gnu.tar.gz",
+    platform: "unknown-linux-gnu",
+    version: "0.7.12-alpha.1",
+  },
+  {
+    arch: "x86_64",
+    artifactName: "uv-x86_64-unknown-linux-gnu.tar.gz",
+    downloadUrl:
+      "https://example.com/releases/download/0.7.13/uv-x86_64-unknown-linux-gnu.tar.gz",
+    platform: "unknown-linux-gnu",
+    version: "0.7.13",
+  },
+]);
+
+const ndjsonManifestResponse = `{"version":"0.10.0","artifacts":[{"platform":"x86_64-unknown-linux-gnu","variant":"default","url":"https://example.com/releases/download/0.10.0/uv-x86_64-unknown-linux-gnu.tar.gz","archive_format":"tar.gz","sha256":"checksum-100"}]}
+{"version":"0.9.30","artifacts":[{"platform":"x86_64-unknown-linux-gnu","variant":"default","url":"https://example.com/releases/download/0.9.30/uv-x86_64-unknown-linux-gnu.tar.gz","archive_format":"tar.gz","sha256":"checksum-0930"}]}`;
+
+const multiVariantManifestResponse = `{"version":"0.10.0","artifacts":[{"platform":"x86_64-unknown-linux-gnu","variant":"managed-python","url":"https://example.com/releases/download/0.10.0/uv-x86_64-unknown-linux-gnu-managed-python.tar.gz","archive_format":"tar.gz","sha256":"checksum-managed"},{"platform":"x86_64-unknown-linux-gnu","variant":"default","url":"https://example.com/releases/download/0.10.0/uv-x86_64-unknown-linux-gnu-default.zip","archive_format":"zip","sha256":"checksum-default"}]}`;
+
+function createMockResponse(
+  ok: boolean,
+  status: number,
+  statusText: string,
+  data: string,
+) {
+  return {
+    ok,
+    status,
+    statusText,
+    text: async () => data,
+  };
+}
+
+describe("version-manifest", () => {
+  beforeEach(() => {
+    clearManifestCache();
+    mockFetch.mockReset();
+    mockWarning.mockReset();
+  });
+
+  it("supports the legacy JSON manifest format", async () => {
+    mockFetch.mockResolvedValue(
+      createMockResponse(true, 200, "OK", legacyManifestResponse),
+    );
+
+    const latest = await getLatestKnownVersion(
+      "https://example.com/legacy.json",
+    );
+    const artifact = await getManifestArtifact(
+      "https://example.com/legacy.json",
+      "0.7.13",
+      "x86_64",
+      "unknown-linux-gnu",
+    );
+
+    expect(latest).toBe("0.7.13");
+    expect(artifact).toEqual({
+      archiveFormat: undefined,
+      checksum: undefined,
+      downloadUrl:
+        "https://example.com/releases/download/0.7.13/uv-x86_64-unknown-linux-gnu.tar.gz",
+    });
+    expect(mockWarning).toHaveBeenCalledTimes(1);
+  });
+
+  it("supports NDJSON manifests", async () => {
+    mockFetch.mockResolvedValue(
+      createMockResponse(true, 200, "OK", ndjsonManifestResponse),
+    );
+
+    const versions = await getAllVersions("https://example.com/custom.ndjson");
+    const artifact = await getManifestArtifact(
+      "https://example.com/custom.ndjson",
+      "0.10.0",
+      "x86_64",
+      "unknown-linux-gnu",
+    );
+
+    expect(versions).toEqual(["0.10.0", "0.9.30"]);
+    expect(artifact).toEqual({
+      archiveFormat: "tar.gz",
+      checksum: "checksum-100",
+      downloadUrl:
+        "https://example.com/releases/download/0.10.0/uv-x86_64-unknown-linux-gnu.tar.gz",
+    });
+    expect(mockWarning).not.toHaveBeenCalled();
+  });
+
+  it("prefers the default variant when a manifest contains multiple variants", async () => {
+    mockFetch.mockResolvedValue(
+      createMockResponse(true, 200, "OK", multiVariantManifestResponse),
+    );
+
+    const artifact = await getManifestArtifact(
+      "https://example.com/multi-variant.ndjson",
+      "0.10.0",
+      "x86_64",
+      "unknown-linux-gnu",
+    );
+
+    expect(artifact).toEqual({
+      archiveFormat: "zip",
+      checksum: "checksum-default",
+      downloadUrl:
+        "https://example.com/releases/download/0.10.0/uv-x86_64-unknown-linux-gnu-default.zip",
+    });
+  });
+});

__tests__/download/versions-client.test.ts

@@ -0,0 +1,169 @@
+import { beforeEach, describe, expect, it, jest } from "@jest/globals";
+
+// biome-ignore lint/suspicious/noExplicitAny: Mock requires flexible typing in tests.
+const mockFetch = jest.fn<any>();
+jest.mock("../../src/utils/fetch", () => ({
+  fetch: mockFetch,
+}));
+
+import {
+  clearCache,
+  fetchVersionData,
+  getAllVersions,
+  getArtifact,
+  getLatestVersion,
+  parseVersionData,
+} from "../../src/download/versions-client";
+
+const sampleNdjsonResponse = `{"version":"0.9.26","artifacts":[{"platform":"aarch64-apple-darwin","variant":"default","url":"https://github.com/astral-sh/uv/releases/download/0.9.26/uv-aarch64-apple-darwin.tar.gz","archive_format":"tar.gz","sha256":"fcf0a9ea6599c6ae28a4c854ac6da76f2c889354d7c36ce136ef071f7ab9721f"},{"platform":"x86_64-pc-windows-msvc","variant":"default","url":"https://github.com/astral-sh/uv/releases/download/0.9.26/uv-x86_64-pc-windows-msvc.zip","archive_format":"zip","sha256":"eb02fd95d8e0eed462b4a67ecdd320d865b38c560bffcda9a0b87ec944bdf036"}]}
+{"version":"0.9.25","artifacts":[{"platform":"aarch64-apple-darwin","variant":"default","url":"https://github.com/astral-sh/uv/releases/download/0.9.25/uv-aarch64-apple-darwin.tar.gz","archive_format":"tar.gz","sha256":"606b3c6949d971709f2526fa0d9f0fd23ccf60e09f117999b406b424af18a6a6"}]}`;
+
+const multiVariantNdjsonResponse = `{"version":"0.9.26","artifacts":[{"platform":"aarch64-apple-darwin","variant":"python-managed","url":"https://github.com/astral-sh/uv/releases/download/0.9.26/uv-aarch64-apple-darwin-managed.tar.gz","archive_format":"tar.gz","sha256":"managed-checksum"},{"platform":"aarch64-apple-darwin","variant":"default","url":"https://github.com/astral-sh/uv/releases/download/0.9.26/uv-aarch64-apple-darwin.zip","archive_format":"zip","sha256":"default-checksum"}]}`;
+
+function createMockResponse(
+  ok: boolean,
+  status: number,
+  statusText: string,
+  data: string,
+) {
+  return {
+    ok,
+    status,
+    statusText,
+    text: async () => data,
+  };
+}
+
+describe("versions-client", () => {
+  beforeEach(() => {
+    clearCache();
+    mockFetch.mockReset();
+  });
+
+  describe("fetchVersionData", () => {
+    it("should fetch and parse NDJSON data", async () => {
+      mockFetch.mockResolvedValue(
+        createMockResponse(true, 200, "OK", sampleNdjsonResponse),
+      );
+
+      const versions = await fetchVersionData();
+
+      expect(versions).toHaveLength(2);
+      expect(versions[0].version).toBe("0.9.26");
+      expect(versions[1].version).toBe("0.9.25");
+    });
+
+    it("should throw error on failed fetch", async () => {
+      mockFetch.mockResolvedValue(
+        createMockResponse(false, 500, "Internal Server Error", ""),
+      );
+
+      await expect(fetchVersionData()).rejects.toThrow(
+        "Failed to fetch version data: 500 Internal Server Error",
+      );
+    });
+
+    it("should cache results", async () => {
+      mockFetch.mockResolvedValue(
+        createMockResponse(true, 200, "OK", sampleNdjsonResponse),
+      );
+
+      await fetchVersionData();
+      await fetchVersionData();
+
+      expect(mockFetch).toHaveBeenCalledTimes(1);
+    });
+  });
+
+  describe("getLatestVersion", () => {
+    it("should return the first version (newest)", async () => {
+      mockFetch.mockResolvedValue(
+        createMockResponse(true, 200, "OK", sampleNdjsonResponse),
+      );
+
+      const latest = await getLatestVersion();
+
+      expect(latest).toBe("0.9.26");
+    });
+  });
+
+  describe("getAllVersions", () => {
+    it("should return all version strings", async () => {
+      mockFetch.mockResolvedValue(
+        createMockResponse(true, 200, "OK", sampleNdjsonResponse),
+      );
+
+      const versions = await getAllVersions();
+
+      expect(versions).toEqual(["0.9.26", "0.9.25"]);
+    });
+  });
+
+  describe("getArtifact", () => {
+    beforeEach(() => {
+      mockFetch.mockResolvedValue(
+        createMockResponse(true, 200, "OK", sampleNdjsonResponse),
+      );
+    });
+
+    it("should find artifact by version and platform", async () => {
+      const artifact = await getArtifact("0.9.26", "aarch64", "apple-darwin");
+
+      expect(artifact).toEqual({
+        archiveFormat: "tar.gz",
+        sha256:
+          "fcf0a9ea6599c6ae28a4c854ac6da76f2c889354d7c36ce136ef071f7ab9721f",
+        url: "https://github.com/astral-sh/uv/releases/download/0.9.26/uv-aarch64-apple-darwin.tar.gz",
+      });
+    });
+
+    it("should find windows artifact", async () => {
+      const artifact = await getArtifact("0.9.26", "x86_64", "pc-windows-msvc");
+
+      expect(artifact).toEqual({
+        archiveFormat: "zip",
+        sha256:
+          "eb02fd95d8e0eed462b4a67ecdd320d865b38c560bffcda9a0b87ec944bdf036",
+        url: "https://github.com/astral-sh/uv/releases/download/0.9.26/uv-x86_64-pc-windows-msvc.zip",
+      });
+    });
+
+    it("should prefer the default variant when multiple artifacts share a platform", async () => {
+      mockFetch.mockResolvedValue(
+        createMockResponse(true, 200, "OK", multiVariantNdjsonResponse),
+      );
+
+      const artifact = await getArtifact("0.9.26", "aarch64", "apple-darwin");
+
+      expect(artifact).toEqual({
+        archiveFormat: "zip",
+        sha256: "default-checksum",
+        url: "https://github.com/astral-sh/uv/releases/download/0.9.26/uv-aarch64-apple-darwin.zip",
+      });
+    });
+
+    it("should return undefined for unknown version", async () => {
+      const artifact = await getArtifact("0.0.1", "aarch64", "apple-darwin");
+
+      expect(artifact).toBeUndefined();
+    });
+
+    it("should return undefined for unknown platform", async () => {
+      const artifact = await getArtifact(
+        "0.9.26",
+        "aarch64",
+        "unknown-linux-musl",
+      );
+
+      expect(artifact).toBeUndefined();
+    });
+  });
+
+  describe("parseVersionData", () => {
+    it("should throw for malformed NDJSON", () => {
+      expect(() =>
+        parseVersionData('{"version":"0.1.0"', "test-source"),
+      ).toThrow("Failed to parse version data from test-source");
+    });
+  });
+});

__tests__/fixtures/old-python-constraint-project/pyproject.toml

@@ -9,5 +9,5 @@ dependencies = [
 ]
 
 [build-system]
-requires = ["hatchling"]
-build-backend = "hatchling.build"
+requires = ["uv_build>=0.9.22,<0.10.0"]
+build-backend = "uv_build"

__tests__/fixtures/old-python-constraint-project/uv.lock

@@ -1,33 +1,9 @@
 version = 1
-requires-python = ">=3.12"
+revision = 3
+requires-python = ">=3.8, <=3.9"
 
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-
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-name = "uv-project"
+name = "old-python-constraint-project"
 version = "0.1.0"
 source = { editable = "." }
 dependencies = [
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+    { url = "https://files.pythonhosted.org/packages/f2/1c/d7b67ab43f30013b47c12b42d1acd354c195351a3f7a1d67f59e54227ede/ruff-0.14.10-py3-none-win32.whl", hash = "sha256:104c49fc7ab73f3f3a758039adea978869a918f31b73280db175b43a2d9b51d6", size = 13196187, upload-time = "2025-12-18T19:29:19.006Z" },
+    { url = "https://files.pythonhosted.org/packages/fb/9c/896c862e13886fae2af961bef3e6312db9ebc6adc2b156fe95e615dee8c1/ruff-0.14.10-py3-none-win_amd64.whl", hash = "sha256:466297bd73638c6bdf06485683e812db1c00c7ac96d4ddd0294a338c62fdc154", size = 14661283, upload-time = "2025-12-18T19:29:30.16Z" },
+    { url = "https://files.pythonhosted.org/packages/74/31/b0e29d572670dca3674eeee78e418f20bdf97fa8aa9ea71380885e175ca0/ruff-0.14.10-py3-none-win_arm64.whl", hash = "sha256:e51d046cf6dda98a4633b8a8a771451107413b0f07183b2bef03f075599e44e6", size = 13729839, upload-time = "2025-12-18T19:28:48.636Z" },
+]

__tests__/utils/inputs.test.ts

@@ -5,6 +5,7 @@ jest.mock("@actions/core", () => {
       (name: string) => (mockInputs[name] ?? "") === "true",
     ),
     getInput: jest.fn((name: string) => mockInputs[name] ?? ""),
+    warning: jest.fn(),
   };
 });
 
@@ -24,6 +25,7 @@ const ORIGINAL_HOME = process.env.HOME;
 describe("cacheDependencyGlob", () => {
   beforeEach(() => {
     jest.resetModules();
+    jest.clearAllMocks();
     mockInputs = {};
     process.env.HOME = "/home/testuser";
   });
@@ -84,3 +86,125 @@ describe("cacheDependencyGlob", () => {
     );
   });
 });
+
+describe("tool directories", () => {
+  beforeEach(() => {
+    jest.resetModules();
+    jest.clearAllMocks();
+    mockInputs = {};
+    process.env.HOME = "/home/testuser";
+  });
+
+  afterEach(() => {
+    process.env.HOME = ORIGINAL_HOME;
+  });
+
+  it("expands tilde for tool-bin-dir and tool-dir", async () => {
+    mockInputs["working-directory"] = "/workspace";
+    mockInputs["tool-bin-dir"] = "~/tool-bin-dir";
+    mockInputs["tool-dir"] = "~/tool-dir";
+
+    const { toolBinDir, toolDir } = await import("../../src/utils/inputs");
+
+    expect(toolBinDir).toBe("/home/testuser/tool-bin-dir");
+    expect(toolDir).toBe("/home/testuser/tool-dir");
+  });
+});
+
+describe("cacheLocalPath", () => {
+  beforeEach(() => {
+    jest.resetModules();
+    jest.clearAllMocks();
+    mockInputs = {};
+    process.env.HOME = "/home/testuser";
+  });
+
+  afterEach(() => {
+    process.env.HOME = ORIGINAL_HOME;
+  });
+
+  it("expands tilde in cache-local-path", async () => {
+    mockInputs["working-directory"] = "/workspace";
+    mockInputs["cache-local-path"] = "~/uv-cache/cache-local-path";
+
+    const { CacheLocalSource, cacheLocalPath } = await import(
+      "../../src/utils/inputs"
+    );
+
+    expect(cacheLocalPath).toEqual({
+      path: "/home/testuser/uv-cache/cache-local-path",
+      source: CacheLocalSource.Input,
+    });
+  });
+});
+
+describe("venvPath", () => {
+  beforeEach(() => {
+    jest.resetModules();
+    jest.clearAllMocks();
+    mockInputs = {};
+    process.env.HOME = "/home/testuser";
+  });
+
+  afterEach(() => {
+    process.env.HOME = ORIGINAL_HOME;
+  });
+
+  it("defaults to .venv in the working directory", async () => {
+    mockInputs["working-directory"] = "/workspace";
+    const { venvPath } = await import("../../src/utils/inputs");
+    expect(venvPath).toBe("/workspace/.venv");
+  });
+
+  it("resolves a relative venv-path", async () => {
+    mockInputs["working-directory"] = "/workspace";
+    mockInputs["activate-environment"] = "true";
+    mockInputs["venv-path"] = "custom-venv";
+    const { venvPath } = await import("../../src/utils/inputs");
+    expect(venvPath).toBe("/workspace/custom-venv");
+  });
+
+  it("normalizes venv-path with trailing slash", async () => {
+    mockInputs["working-directory"] = "/workspace";
+    mockInputs["activate-environment"] = "true";
+    mockInputs["venv-path"] = "custom-venv/";
+    const { venvPath } = await import("../../src/utils/inputs");
+    expect(venvPath).toBe("/workspace/custom-venv");
+  });
+
+  it("keeps an absolute venv-path unchanged", async () => {
+    mockInputs["working-directory"] = "/workspace";
+    mockInputs["activate-environment"] = "true";
+    mockInputs["venv-path"] = "/tmp/custom-venv";
+    const { venvPath } = await import("../../src/utils/inputs");
+    expect(venvPath).toBe("/tmp/custom-venv");
+  });
+
+  it("expands tilde in venv-path", async () => {
+    mockInputs["working-directory"] = "/workspace";
+    mockInputs["activate-environment"] = "true";
+    mockInputs["venv-path"] = "~/.venv";
+    const { venvPath } = await import("../../src/utils/inputs");
+    expect(venvPath).toBe("/home/testuser/.venv");
+  });
+
+  it("warns when venv-path is set but activate-environment is false", async () => {
+    mockInputs["working-directory"] = "/workspace";
+    mockInputs["venv-path"] = "custom-venv";
+
+    const { activateEnvironment, venvPath } = await import(
+      "../../src/utils/inputs"
+    );
+
+    expect(activateEnvironment).toBe(false);
+    expect(venvPath).toBe("/workspace/custom-venv");
+
+    const mockedCore = jest.requireMock("@actions/core") as {
+      warning: jest.Mock;
+    };
+
+    expect(mockedCore.warning).toHaveBeenCalledWith(
+      "venv-path is only used when activate-environment is true",
+    );
+  });
+});

action-types.yml

@@ -0,0 +1,77 @@
+# See https://github.com/typesafegithub/github-actions-typing
+
+inputs:
+  version:
+    type: string
+  version-file:
+    type: string
+  python-version:
+    type: string
+  activate-environment:
+    type: boolean
+  venv-path:
+    type: string
+  working-directory:
+    type: string
+  checksum:
+    type: string
+  github-token:
+    type: string
+  enable-cache:
+    type: enum
+    allowed-values:
+      - "true"
+      - "false"
+      - auto
+  cache-dependency-glob:
+    type: list
+    separator: "\n"
+    list-item:
+      type: string
+  restore-cache:
+    type: boolean
+  save-cache:
+    type: boolean
+  cache-suffix:
+    type: string
+  cache-local-path:
+    type: string
+  prune-cache:
+    type: boolean
+  cache-python:
+    type: boolean
+  ignore-nothing-to-cache:
+    type: boolean
+  ignore-empty-workdir:
+    type: boolean
+  tool-dir:
+    type: string
+  tool-bin-dir:
+    type: string
+  manifest-file:
+    type: string
+  add-problem-matchers:
+    type: boolean
+  resolution-strategy:
+    type: enum
+    allowed-values:
+      - highest
+      - lowest
+
+outputs:
+  uv-version:
+    type: string
+  uv-path:
+    type: string
+  uvx-path:
+    type: string
+  cache-hit:
+    type: boolean
+  cache-key:
+    type: string
+  venv:
+    type: string
+  python-version:
+    type: string
+  python-cache-hit:
+    type: boolean

action.yml

@@ -15,6 +15,9 @@ inputs:
   activate-environment:
     description: "Use uv venv to activate a venv ready to be used by later steps. "
     default: "false"
+  venv-path:
+    description: "Custom path for the virtual environment when using activate-environment. Defaults to '.venv' in the working directory."
+    default: ""
   working-directory:
     description: "The directory to execute all commands in and look for files such as pyproject.toml"
     default: ${{ github.workspace }}
@@ -23,7 +26,7 @@ inputs:
     required: false
   github-token:
     description:
-      "Used to increase the rate limit when retrieving versions and downloading uv."
+      "Used when downloading uv from GitHub releases."
     required: false
     default: ${{ github.token }}
   enable-cache:
@@ -31,7 +34,7 @@ inputs:
     default: "auto"
   cache-dependency-glob:
     description:
-      "Glob pattern to match files relative to the repository root to control
+      "Glob pattern to match files relative to the working directory to control
       the cache."
     default: |
       **/*requirements*.txt
@@ -72,7 +75,7 @@ inputs:
     description: "Custom path to set UV_TOOL_BIN_DIR to."
     required: false
   manifest-file:
-    description: "URL to the manifest file containing available versions and download URLs."
+    description: "URL to a custom manifest file. Supports the astral-sh/versions NDJSON format and the legacy JSON array format (deprecated)."
     required: false
   add-problem-matchers:
     description: "Add problem matchers."
@@ -89,8 +92,14 @@ outputs:
     description: "The path to the installed uvx binary."
   cache-hit:
     description: "A boolean value to indicate a cache entry was found"
+  cache-key:
+    description: "The cache key used for storing/restoring the cache"
   venv:
     description: "Path to the activated venv if activate-environment is true"
+  python-version:
+    description: "The Python version that was set."
+  python-cache-hit:
+    description: "A boolean value to indicate the Python cache entry was found"
 runs:
   using: "node24"
   main: "dist/setup/index.js"

biome.json

@@ -1,5 +1,5 @@
 {
-  "$schema": "https://biomejs.dev/schemas/2.2.5/schema.json",
+  "$schema": "https://biomejs.dev/schemas/2.3.7/schema.json",
   "assist": {
     "actions": {
       "source": {
@@ -18,7 +18,8 @@
       "!**/node_modules",
       "!**/package*.json",
       "!**/known-checksums.*"
-    ]
+    ],
+    "maxSize": 2097152
   },
   "formatter": {
     "enabled": true,

docs/caching.md

@@ -2,6 +2,34 @@
 
 This document covers all caching-related configuration options for setup-uv.
 
+## Cache key
+
+The cache key is automatically generated based on:
+
+- **Architecture**: CPU architecture (e.g., `x86_64`, `aarch64`)
+- **Platform**: OS platform type (e.g., `unknown-linux-gnu`, `unknown-linux-musl`, `apple-darwin`,
+  `pc-windows-msvc`)
+- **OS version**: OS name and version (e.g., `ubuntu-22.04`, `macos-14`, `windows-2022`)
+- **Python version**: The Python version in use
+- **Cache options**: Whether pruning and Python caching are enabled
+- **Dependency hash**: Hash of files matching `cache-dependency-glob`
+- **Suffix**: Optional `cache-suffix` if provided
+
+Including the OS version ensures that caches are not shared between different OS versions,
+preventing binary incompatibility issues when runner images change.
+
+The computed cache key is available as the `cache-key` output:
+
+```yaml
+- name: Setup uv
+  id: setup-uv
+  uses: astral-sh/setup-uv@v7
+  with:
+    enable-cache: true
+- name: Print cache key
+  run: echo "Cache key: ${{ steps.setup-uv.outputs.cache-key }}"
+```
+
 ## Enable caching
 
 > [!NOTE]
@@ -41,7 +69,7 @@ use it in subsequent steps. For example, to use the cache in the above case:
 
 If you want to control when the GitHub Actions cache is invalidated, specify a glob pattern with the
 `cache-dependency-glob` input. The GitHub Actions cache will be invalidated if any file matching the glob pattern
-changes. If you use relative paths, they are relative to the repository root.
+changes. If you use relative paths, they are relative to the working directory.
 
 > [!NOTE]
 >
@@ -134,6 +162,10 @@ It defaults to `setup-uv-cache` in the `TMP` dir, `D:\a\_temp\setup-uv-cache` on
 > If you configured [cache-dir](https://docs.astral.sh/uv/reference/settings/#cache-dir) in your
 > config file then it is also respected and this action will not set `UV_CACHE_DIR`.
 
+> [!NOTE]
+> If caching is disabled, you can still use `cache-local-path` so this action sets `UV_CACHE_DIR`
+> to your desired path.
+
 ```yaml
 - name: Define a custom uv cache path
   uses: astral-sh/setup-uv@v7
@@ -167,6 +199,10 @@ By default, the Python install dir (`uv python dir` / `UV_PYTHON_INSTALL_DIR`) i
 for the same reason that the dependency cache is pruned.
 If you want to cache Python installs along with your dependencies, set the `cache-python` input to `true`.
 
+Note that this only caches Python versions that uv actually installs into `UV_PYTHON_INSTALL_DIR`
+(i.e. managed Python installs). If uv uses a system Python, there may be nothing to cache.
+To force managed Python installs, set `UV_PYTHON_PREFERENCE=only-managed`.
+
 ```yaml
 - name: Cache Python installs
   uses: astral-sh/setup-uv@v7

docs/customization.md

@@ -18,12 +18,29 @@ are automatically verified by this action. The sha256 hashes can be found on the
 
 ## Manifest file
 
-The `manifest-file` input allows you to specify a JSON manifest that lists available uv versions,
-architectures, and their download URLs. By default, this action uses the manifest file contained
-in this repository, which is automatically updated with each release of uv.
+By default, setup-uv reads version metadata from
+[`astral-sh/versions`](https://github.com/astral-sh/versions) (NDJSON format).
 
-The manifest file contains an array of objects, each describing a version,
-architecture, platform, and the corresponding download URL. For example:
+The `manifest-file` input lets you override that source with your own URL, for example to test
+custom uv builds or alternate download locations.
+
+### Format
+
+The manifest file must be in NDJSON format, where each line is a JSON object representing a version and its artifacts. For example:
+
+```json
+{"version":"0.10.7","artifacts":[{"platform":"x86_64-unknown-linux-gnu","variant":"default","url":"https://example.com/uv-x86_64-unknown-linux-gnu.tar.gz","archive_format":"tar.gz","sha256":"..."}]}
+{"version":"0.10.6","artifacts":[{"platform":"x86_64-unknown-linux-gnu","variant":"default","url":"https://example.com/uv-x86_64-unknown-linux-gnu.tar.gz","archive_format":"tar.gz","sha256":"..."}]}
+```
+
+setup-uv currently only supports `default` as the `variant`.
+
+The `archive_format` field is currently ignored.
+
+### Legacy format: JSON array (deprecated)
+
+The previous JSON array format is still supported for compatibility, but deprecated and will be
+removed in a future major release.
 
 ```json
 [
@@ -33,26 +50,20 @@ architecture, platform, and the corresponding download URL. For example:
     "arch": "aarch64",
     "platform": "apple-darwin",
     "downloadUrl": "https://github.com/astral-sh/uv/releases/download/0.7.13/uv-aarch64-apple-darwin.tar.gz"
-  },
-  ...
+  }
 ]
 ```
 
-You can supply a custom manifest file URL to define additional versions,
-architectures, or different download URLs.
-This is useful if you maintain your own uv builds or want to override the default sources.
-
 ```yaml
 - name: Use a custom manifest file
   uses: astral-sh/setup-uv@v7
   with:
-    manifest-file: "https://example.com/my-custom-manifest.json"
+    manifest-file: "https://example.com/my-custom-manifest.ndjson"
 ```
 
 > [!NOTE]
-> When you use a custom manifest file and do not set the `version` input, its default value is `latest`.
-> This means the action will install the latest version available in the custom manifest file.
-> This is different from the default behavior of installing the latest version from the official uv releases.
+> When you use a custom manifest file and do not set the `version` input, setup-uv installs the
+> latest version from that custom manifest.
 
 ## Add problem matchers
 

docs/environment-and-tools.md

@@ -15,6 +15,17 @@ This allows directly using it in later steps:
 - run: uv pip install pip
 ```
 
+By default, the venv is created at `.venv` inside the `working-directory`.
+
+You can customize the venv location with `venv-path`, for example to place it in the runner temp directory:
+
+```yaml
+- uses: astral-sh/setup-uv@v7
+  with:
+    activate-environment: true
+    venv-path: ${{ runner.temp }}/custom-venv
+```
+
 > [!WARNING]
 >
 > Activating the environment adds your dependencies to the `PATH`, which could break some workflows.
@@ -27,9 +38,12 @@ This allows directly using it in later steps:
 
 ## GitHub authentication token
 
-This action uses the GitHub API to fetch the uv release artifacts. To avoid hitting the GitHub API
-rate limit too quickly, an authentication token can be provided via the `github-token` input. By
-default, the `GITHUB_TOKEN` secret is used, which is automatically provided by GitHub Actions.
+By default, this action resolves available uv versions from
+[`astral-sh/versions`](https://github.com/astral-sh/versions), then downloads uv artifacts from
+GitHub Releases.
+
+You can provide a token via `github-token` to authenticate those downloads. By default, the
+`GITHUB_TOKEN` secret is used, which is automatically provided by GitHub Actions.
 
 If the default
 [permissions for the GitHub token](https://docs.github.com/en/actions/security-for-github-actions/security-guides/automatic-token-authentication#permissions-for-the-github_token)

package-lock.json

@@ -15,22 +15,19 @@
         "@actions/glob": "^0.5.0",
         "@actions/io": "^1.1.3",
         "@actions/tool-cache": "^2.0.2",
-        "@octokit/core": "^7.0.5",
-        "@octokit/plugin-paginate-rest": "^13.2.0",
-        "@octokit/plugin-rest-endpoint-methods": "^16.1.0",
         "@renovatebot/pep440": "^4.2.1",
-        "smol-toml": "^1.4.2",
-        "undici": "^7.16.0"
+        "smol-toml": "^1.6.0",
+        "undici": "7.22.0"
       },
       "devDependencies": {
-        "@biomejs/biome": "2.2.5",
+        "@biomejs/biome": "2.3.8",
         "@types/js-yaml": "^4.0.9",
-        "@types/node": "^24.7.0",
+        "@types/node": "^24.10.1",
         "@types/semver": "^7.7.1",
         "@vercel/ncc": "^0.38.4",
         "jest": "^30.2.0",
         "js-yaml": "^4.1.0",
-        "ts-jest": "^29.4.4",
+        "ts-jest": "^29.4.5",
         "typescript": "^5.9.3"
       }
     },
@@ -100,7 +97,6 @@
       "version": "5.29.0",
       "resolved": "https://registry.npmjs.org/undici/-/undici-5.29.0.tgz",
       "integrity": "sha512-raqeBD6NQK4SkWhQzeYKd1KmIG6dllBOTt55Rmkt4HtI9mwdWtJljnrXjAFUBLTSN67HWrOIZ3EPF4kjUw80Bg==",
-      "license": "MIT",
       "dependencies": {
         "@fastify/busboy": "^2.0.0"
       },
@@ -424,7 +420,6 @@
       "integrity": "sha512-UlLAnTPrFdNGoFtbSXwcGFQBtQZJCNjaN6hQNP3UPvuNXT1i82N26KL3dZeIpNalWywr9IuQuncaAfUaS1g6sQ==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@ampproject/remapping": "^2.2.0",
         "@babel/code-frame": "^7.27.1",
@@ -902,9 +897,9 @@
       "license": "MIT"
     },
     "node_modules/@biomejs/biome": {
-      "version": "2.2.5",
-      "resolved": "https://registry.npmjs.org/@biomejs/biome/-/biome-2.2.5.tgz",
-      "integrity": "sha512-zcIi+163Rc3HtyHbEO7CjeHq8DjQRs40HsGbW6vx2WI0tg8mYQOPouhvHSyEnCBAorfYNnKdR64/IxO7xQ5faw==",
+      "version": "2.3.8",
+      "resolved": "https://registry.npmjs.org/@biomejs/biome/-/biome-2.3.8.tgz",
+      "integrity": "sha512-Qjsgoe6FEBxWAUzwFGFrB+1+M8y/y5kwmg5CHac+GSVOdmOIqsAiXM5QMVGZJ1eCUCLlPZtq4aFAQ0eawEUuUA==",
       "dev": true,
       "license": "MIT OR Apache-2.0",
       "bin": {
@@ -918,20 +913,20 @@
         "url": "https://opencollective.com/biome"
       },
       "optionalDependencies": {
-        "@biomejs/cli-darwin-arm64": "2.2.5",
-        "@biomejs/cli-darwin-x64": "2.2.5",
-        "@biomejs/cli-linux-arm64": "2.2.5",
-        "@biomejs/cli-linux-arm64-musl": "2.2.5",
-        "@biomejs/cli-linux-x64": "2.2.5",
-        "@biomejs/cli-linux-x64-musl": "2.2.5",
-        "@biomejs/cli-win32-arm64": "2.2.5",
-        "@biomejs/cli-win32-x64": "2.2.5"
+        "@biomejs/cli-darwin-arm64": "2.3.8",
+        "@biomejs/cli-darwin-x64": "2.3.8",
+        "@biomejs/cli-linux-arm64": "2.3.8",
+        "@biomejs/cli-linux-arm64-musl": "2.3.8",
+        "@biomejs/cli-linux-x64": "2.3.8",
+        "@biomejs/cli-linux-x64-musl": "2.3.8",
+        "@biomejs/cli-win32-arm64": "2.3.8",
+        "@biomejs/cli-win32-x64": "2.3.8"
       }
     },
     "node_modules/@biomejs/cli-darwin-arm64": {
-      "version": "2.2.5",
-      "resolved": "https://registry.npmjs.org/@biomejs/cli-darwin-arm64/-/cli-darwin-arm64-2.2.5.tgz",
-      "integrity": "sha512-MYT+nZ38wEIWVcL5xLyOhYQQ7nlWD0b/4mgATW2c8dvq7R4OQjt/XGXFkXrmtWmQofaIM14L7V8qIz/M+bx5QQ==",
+      "version": "2.3.8",
+      "resolved": "https://registry.npmjs.org/@biomejs/cli-darwin-arm64/-/cli-darwin-arm64-2.3.8.tgz",
+      "integrity": "sha512-HM4Zg9CGQ3txTPflxD19n8MFPrmUAjaC7PQdLkugeeC0cQ+PiVrd7i09gaBS/11QKsTDBJhVg85CEIK9f50Qww==",
       "cpu": [
         "arm64"
       ],
@@ -946,9 +941,9 @@
       }
     },
     "node_modules/@biomejs/cli-darwin-x64": {
-      "version": "2.2.5",
-      "resolved": "https://registry.npmjs.org/@biomejs/cli-darwin-x64/-/cli-darwin-x64-2.2.5.tgz",
-      "integrity": "sha512-FLIEl73fv0R7dI10EnEiZLw+IMz3mWLnF95ASDI0kbx6DDLJjWxE5JxxBfmG+udz1hIDd3fr5wsuP7nwuTRdAg==",
+      "version": "2.3.8",
+      "resolved": "https://registry.npmjs.org/@biomejs/cli-darwin-x64/-/cli-darwin-x64-2.3.8.tgz",
+      "integrity": "sha512-lUDQ03D7y/qEao7RgdjWVGCu+BLYadhKTm40HkpJIi6kn8LSv5PAwRlew/DmwP4YZ9ke9XXoTIQDO1vAnbRZlA==",
       "cpu": [
         "x64"
       ],
@@ -963,9 +958,9 @@
       }
     },
     "node_modules/@biomejs/cli-linux-arm64": {
-      "version": "2.2.5",
-      "resolved": "https://registry.npmjs.org/@biomejs/cli-linux-arm64/-/cli-linux-arm64-2.2.5.tgz",
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+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-4.1.1.tgz",
+      "integrity": "sha512-qQKT4zQxXl8lLwBtHMWwaTcGfFOZviOJet3Oy/xmGk2gZH677CJM9EvtfdSkgWcATZhj/55JZ0rmy3myCT5lsA==",
       "dev": true,
       "requires": {
         "argparse": "^2.0.1"
@@ -9149,9 +8884,9 @@
       "dev": true
     },
     "smol-toml": {
-      "version": "1.4.2",
-      "resolved": "https://registry.npmjs.org/smol-toml/-/smol-toml-1.4.2.tgz",
-      "integrity": "sha512-rInDH6lCNiEyn3+hH8KVGFdbjc099j47+OSgbMrfDYX1CmXLfdKd7qi6IfcWj2wFxvSVkuI46M+wPGYfEOEj6g=="
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/smol-toml/-/smol-toml-1.6.0.tgz",
+      "integrity": "sha512-4zemZi0HvTnYwLfrpk/CF9LOd9Lt87kAt50GnqhMpyF9U3poDAP2+iukq2bZsO/ufegbYehBkqINbsWxj4l4cw=="
     },
     "source-map": {
       "version": "0.6.1",
@@ -9366,9 +9101,9 @@
       "integrity": "sha512-N3WMsuqV66lT30CrXNbEjx4GEwlow3v6rr4mCcv6prnfwhS01rkgyFdjPNBYd9br7LpXV1+Emh01fHnq2Gdgrw=="
     },
     "ts-jest": {
-      "version": "29.4.4",
-      "resolved": "https://registry.npmjs.org/ts-jest/-/ts-jest-29.4.4.tgz",
-      "integrity": "sha512-ccVcRABct5ZELCT5U0+DZwkXMCcOCLi2doHRrKy1nK/s7J7bch6TzJMsrY09WxgUUIP/ITfmcDS8D2yl63rnXw==",
+      "version": "29.4.5",
+      "resolved": "https://registry.npmjs.org/ts-jest/-/ts-jest-29.4.5.tgz",
+      "integrity": "sha512-HO3GyiWn2qvTQA4kTgjDcXiMwYQt68a1Y8+JuLRVpdIzm+UOLSHgl/XqR4c6nzJkq5rOkjc02O2I7P7l/Yof0Q==",
       "dev": true,
       "requires": {
         "bs-logger": "^0.2.6",
@@ -9377,15 +9112,15 @@
         "json5": "^2.2.3",
         "lodash.memoize": "^4.1.2",
         "make-error": "^1.3.6",
-        "semver": "^7.7.2",
+        "semver": "^7.7.3",
         "type-fest": "^4.41.0",
         "yargs-parser": "^21.1.1"
       },
       "dependencies": {
         "semver": {
-          "version": "7.7.2",
-          "resolved": "https://registry.npmjs.org/semver/-/semver-7.7.2.tgz",
-          "integrity": "sha512-RF0Fw+rO5AMf9MAyaRXI4AV0Ulj5lMHqVxxdSgiVbixSCXoEmmX/jk0CuJw4+3SqroYO9VoUh+HcuJivvtJemA==",
+          "version": "7.7.3",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-7.7.3.tgz",
+          "integrity": "sha512-SdsKMrI9TdgjdweUSR9MweHA4EJ8YxHn8DFaDisvhVlUOe4BF1tLD7GAj0lIqWVl+dPb/rExr0Btby5loQm20Q==",
           "dev": true
         }
       }
@@ -9416,8 +9151,7 @@
       "version": "5.9.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
       "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
-      "dev": true,
-      "peer": true
+      "dev": true
     },
     "uglify-js": {
       "version": "3.19.3",
@@ -9427,19 +9161,14 @@
       "optional": true
     },
     "undici": {
-      "version": "7.16.0",
-      "resolved": "https://registry.npmjs.org/undici/-/undici-7.16.0.tgz",
-      "integrity": "sha512-QEg3HPMll0o3t2ourKwOeUAZ159Kn9mx5pnzHRQO8+Wixmh88YdZRiIwat0iNzNNXn0yoEtXJqFpyW7eM8BV7g=="
+      "version": "7.22.0",
+      "resolved": "https://registry.npmjs.org/undici/-/undici-7.22.0.tgz",
+      "integrity": "sha512-RqslV2Us5BrllB+JeiZnK4peryVTndy9Dnqq62S3yYRRTj0tFQCwEniUy2167skdGOy3vqRzEvl1Dm4sV2ReDg=="
     },
     "undici-types": {
-      "version": "7.14.0",
-      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.14.0.tgz",
-      "integrity": "sha512-QQiYxHuyZ9gQUIrmPo3IA+hUl4KYk8uSA7cHrcKd/l3p1OTpZcM0Tbp9x7FAtXdAYhlasd60ncPpgu6ihG6TOA=="
-    },
-    "universal-user-agent": {
-      "version": "7.0.3",
-      "resolved": "https://registry.npmjs.org/universal-user-agent/-/universal-user-agent-7.0.3.tgz",
-      "integrity": "sha512-TmnEAEAsBJVZM/AADELsK76llnwcf9vMKuPz8JflO1frO8Lchitr0fNaN9d+Ap0BjKtqWqd/J17qeDnXh8CL2A=="
+      "version": "7.16.0",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.16.0.tgz",
+      "integrity": "sha512-Zz+aZWSj8LE6zoxD+xrjh4VfkIG8Ya6LvYkZqtUQGJPZjYl53ypCaUwWqo7eI0x66KBGeRo+mlBEkMSeSZ38Nw=="
     },
     "unrs-resolver": {
       "version": "1.11.1",

package.json

@@ -7,17 +7,22 @@
   "scripts": {
     "build": "tsc",
     "check": "biome check --write",
-    "package": "ncc build -o dist/setup src/setup-uv.ts && ncc build -o dist/save-cache src/save-cache.ts && ncc build -o dist/update-known-versions src/update-known-versions.ts",
+    "package": "ncc build -o dist/setup src/setup-uv.ts && ncc build -o dist/save-cache src/save-cache.ts && ncc build -o dist/update-known-checksums src/update-known-checksums.ts",
     "test": "jest",
     "act": "act pull_request -W .github/workflows/test.yml --container-architecture linux/amd64 -s GITHUB_TOKEN=\"$(gh auth token)\"",
-    "update-known-versions": "RUNNER_TEMP=known_versions node dist/update-known-versions/index.js src/download/checksum/known-versions.ts \"$(gh auth token)\"",
+    "update-known-checksums": "RUNNER_TEMP=known_versions node dist/update-known-checksums/index.js src/download/checksum/known-checksums.ts",
     "all": "npm run build && npm run check && npm run package && npm test"
   },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/astral-sh/setup-uv.git"
   },
-  "keywords": ["actions", "python", "setup", "uv"],
+  "keywords": [
+    "actions",
+    "python",
+    "setup",
+    "uv"
+  ],
   "author": "@eifinger",
   "license": "MIT",
   "dependencies": {
@@ -27,22 +32,19 @@
     "@actions/glob": "^0.5.0",
     "@actions/io": "^1.1.3",
     "@actions/tool-cache": "^2.0.2",
-    "@octokit/core": "^7.0.5",
-    "@octokit/plugin-paginate-rest": "^13.2.0",
-    "@octokit/plugin-rest-endpoint-methods": "^16.1.0",
     "@renovatebot/pep440": "^4.2.1",
-    "smol-toml": "^1.4.2",
-    "undici": "^7.16.0"
+    "smol-toml": "^1.6.0",
+    "undici": "7.22.0"
   },
   "devDependencies": {
-    "@biomejs/biome": "2.2.5",
+    "@biomejs/biome": "2.3.8",
     "@types/js-yaml": "^4.0.9",
-    "@types/node": "^24.7.0",
+    "@types/node": "^24.10.1",
     "@types/semver": "^7.7.1",
     "@vercel/ncc": "^0.38.4",
     "jest": "^30.2.0",
     "js-yaml": "^4.1.0",
-    "ts-jest": "^29.4.4",
+    "ts-jest": "^29.4.5",
     "typescript": "^5.9.3"
   }
 }

src/cache/restore-cache.ts

@@ -1,6 +1,5 @@
 import * as cache from "@actions/cache";
 import * as core from "@actions/core";
-import * as exec from "@actions/exec";
 import { hashFiles } from "../hash/hash-files";
 import {
   cacheDependencyGlob,
@@ -9,46 +8,75 @@ import {
   cacheSuffix,
   pruneCache,
   pythonDir,
-  pythonVersion as pythonVersionInput,
   restoreCache as shouldRestoreCache,
-  workingDirectory,
 } from "../utils/inputs";
-import { getArch, getPlatform } from "../utils/platforms";
+import { getArch, getOSNameVersion, getPlatform } from "../utils/platforms";
 
 export const STATE_CACHE_KEY = "cache-key";
 export const STATE_CACHE_MATCHED_KEY = "cache-matched-key";
-const CACHE_VERSION = "1";
+export const STATE_PYTHON_CACHE_MATCHED_KEY = "python-cache-matched-key";
 
-export async function restoreCache(): Promise<void> {
-  const cacheKey = await computeKeys();
+const CACHE_VERSION = "2";
+
+export async function restoreCache(pythonVersion?: string): Promise<void> {
+  const cacheKey = await computeKeys(pythonVersion);
   core.saveState(STATE_CACHE_KEY, cacheKey);
+  core.setOutput("cache-key", cacheKey);
 
   if (!shouldRestoreCache) {
     core.info("restore-cache is false. Skipping restore cache step.");
+    core.setOutput("python-cache-hit", false);
     return;
   }
 
-  let matchedKey: string | undefined;
-  core.info(
-    `Trying to restore uv cache from GitHub Actions cache with key: ${cacheKey}`,
-  );
-  const cachePaths = [cacheLocalPath];
-  if (cachePython) {
-    cachePaths.push(pythonDir);
+  if (cacheLocalPath === undefined) {
+    throw new Error(
+      "cache-local-path is not set. Cannot restore cache without a valid cache path.",
+    );
   }
+
+  await restoreCacheFromKey(
+    cacheKey,
+    cacheLocalPath.path,
+    STATE_CACHE_MATCHED_KEY,
+    "cache-hit",
+  );
+
+  if (cachePython) {
+    await restoreCacheFromKey(
+      `${cacheKey}-python`,
+      pythonDir,
+      STATE_PYTHON_CACHE_MATCHED_KEY,
+      "python-cache-hit",
+    );
+  } else {
+    core.setOutput("python-cache-hit", false);
+  }
+}
+
+async function restoreCacheFromKey(
+  cacheKey: string,
+  cachePath: string,
+  stateKey: string,
+  outputKey: string,
+): Promise<void> {
+  core.info(
+    `Trying to restore cache from GitHub Actions cache with key: ${cacheKey}`,
+  );
+  let matchedKey: string | undefined;
   try {
-    matchedKey = await cache.restoreCache(cachePaths, cacheKey);
+    matchedKey = await cache.restoreCache([cachePath], cacheKey);
   } catch (err) {
     const message = (err as Error).message;
     core.warning(message);
-    core.setOutput("cache-hit", false);
+    core.setOutput(outputKey, false);
     return;
   }
 
-  handleMatchResult(matchedKey, cacheKey);
+  handleMatchResult(matchedKey, cacheKey, stateKey, outputKey);
 }
 
-async function computeKeys(): Promise<string> {
+async function computeKeys(pythonVersion?: string): Promise<string> {
   let cacheDependencyPathHash = "-";
   if (cacheDependencyGlob !== "") {
     core.info(
@@ -65,57 +93,27 @@ async function computeKeys(): Promise<string> {
     cacheDependencyPathHash = "-no-dependency-glob";
   }
   const suffix = cacheSuffix ? `-${cacheSuffix}` : "";
-  const pythonVersion = await getPythonVersion();
+  const version = pythonVersion ?? "unknown";
   const platform = await getPlatform();
+  const osNameVersion = getOSNameVersion();
   const pruned = pruneCache ? "-pruned" : "";
   const python = cachePython ? "-py" : "";
-  return `setup-uv-${CACHE_VERSION}-${getArch()}-${platform}-${pythonVersion}${pruned}${python}${cacheDependencyPathHash}${suffix}`;
-}
-
-async function getPythonVersion(): Promise<string> {
-  if (pythonVersionInput !== "") {
-    return pythonVersionInput;
-  }
-
-  let output = "";
-  const options: exec.ExecOptions = {
-    listeners: {
-      stdout: (data: Buffer) => {
-        output += data.toString();
-      },
-    },
-    silent: !core.isDebug(),
-  };
-
-  try {
-    const execArgs = ["python", "find", "--directory", workingDirectory];
-    await exec.exec("uv", execArgs, options);
-    const pythonPath = output.trim();
-
-    output = "";
-    await exec.exec(pythonPath, ["--version"], options);
-    // output is like "Python 3.8.10"
-    return output.split(" ")[1].trim();
-  } catch (error) {
-    const err = error as Error;
-    core.debug(`Failed to get python version from uv. Error: ${err.message}`);
-    return "unknown";
-  }
+  return `setup-uv-${CACHE_VERSION}-${getArch()}-${platform}-${osNameVersion}-${version}${pruned}${python}${cacheDependencyPathHash}${suffix}`;
 }
 
 function handleMatchResult(
   matchedKey: string | undefined,
   primaryKey: string,
+  stateKey: string,
+  outputKey: string,
 ): void {
   if (!matchedKey) {
     core.info(`No GitHub Actions cache found for key: ${primaryKey}`);
-    core.setOutput("cache-hit", false);
+    core.setOutput(outputKey, false);
     return;
   }
 
-  core.saveState(STATE_CACHE_MATCHED_KEY, matchedKey);
-  core.info(
-    `uv cache restored from GitHub Actions cache with key: ${matchedKey}`,
-  );
-  core.setOutput("cache-hit", true);
+  core.saveState(stateKey, matchedKey);
+  core.info(`cache restored from GitHub Actions cache with key: ${matchedKey}`);
+  core.setOutput(outputKey, true);
 }

src/download/checksum/checksum.ts

@@ -6,33 +6,35 @@ import type { Architecture, Platform } from "../../utils/platforms";
 import { KNOWN_CHECKSUMS } from "./known-checksums";
 
 export async function validateChecksum(
-  checkSum: string | undefined,
+  checksum: string | undefined,
   downloadPath: string,
   arch: Architecture,
   platform: Platform,
   version: string,
 ): Promise<void> {
-  let isValid: boolean | undefined;
-  if (checkSum !== undefined && checkSum !== "") {
-    isValid = await validateFileCheckSum(downloadPath, checkSum);
-  } else {
-    core.debug("Checksum not provided. Checking known checksums.");
-    const key = `${arch}-${platform}-${version}`;
-    if (key in KNOWN_CHECKSUMS) {
-      const knownChecksum = KNOWN_CHECKSUMS[`${arch}-${platform}-${version}`];
-      core.debug(`Checking checksum for ${arch}-${platform}-${version}.`);
-      isValid = await validateFileCheckSum(downloadPath, knownChecksum);
-    } else {
-      core.debug(`No known checksum found for ${key}.`);
-    }
+  const key = `${arch}-${platform}-${version}`;
+  const hasProvidedChecksum = checksum !== undefined && checksum !== "";
+  const checksumToUse = hasProvidedChecksum ? checksum : KNOWN_CHECKSUMS[key];
+
+  if (checksumToUse === undefined) {
+    core.debug(`No checksum found for ${key}.`);
+    return;
   }
 
-  if (isValid === false) {
-    throw new Error(`Checksum for ${downloadPath} did not match ${checkSum}.`);
-  }
-  if (isValid === true) {
-    core.debug(`Checksum for ${downloadPath} is valid.`);
+  const checksumSource = hasProvidedChecksum
+    ? "provided checksum"
+    : `KNOWN_CHECKSUMS entry for ${key}`;
+
+  core.debug(`Validating checksum using ${checksumSource}.`);
+  const isValid = await validateFileCheckSum(downloadPath, checksumToUse);
+
+  if (!isValid) {
+    throw new Error(
+      `Checksum for ${downloadPath} did not match ${checksumToUse}.`,
+    );
   }
+
+  core.debug(`Checksum for ${downloadPath} is valid.`);
 }
 
 async function validateFileCheckSum(

src/download/checksum/update-known-checksums.ts

@@ -1,59 +1,34 @@
 import { promises as fs } from "node:fs";
-import * as tc from "@actions/tool-cache";
-import { KNOWN_CHECKSUMS } from "./known-checksums";
+
+export interface ChecksumEntry {
+  key: string;
+  checksum: string;
+}
+
 export async function updateChecksums(
   filePath: string,
-  downloadUrls: string[],
+  checksumEntries: ChecksumEntry[],
 ): Promise<void> {
-  await fs.rm(filePath);
-  await fs.appendFile(
-    filePath,
-    "// AUTOGENERATED_DO_NOT_EDIT\nexport const KNOWN_CHECKSUMS: { [key: string]: string } = {\n",
-  );
-  let firstLine = true;
-  for (const downloadUrl of downloadUrls) {
-    const key = getKey(downloadUrl);
-    if (key === undefined) {
+  const deduplicatedEntries = new Map<string, string>();
+
+  for (const entry of checksumEntries) {
+    if (deduplicatedEntries.has(entry.key)) {
       continue;
     }
-    const checksum = await getOrDownloadChecksum(key, downloadUrl);
-    if (!firstLine) {
-      await fs.appendFile(filePath, ",\n");
-    }
-    await fs.appendFile(filePath, `  "${key}":\n    "${checksum}"`);
-    firstLine = false;
-  }
-  await fs.appendFile(filePath, ",\n};\n");
-}
 
-function getKey(downloadUrl: string): string | undefined {
-  // https://github.com/astral-sh/uv/releases/download/0.3.2/uv-aarch64-apple-darwin.tar.gz.sha256
-  const parts = downloadUrl.split("/");
-  const fileName = parts[parts.length - 1];
-  if (fileName.startsWith("source")) {
-    return undefined;
+    deduplicatedEntries.set(entry.key, entry.checksum);
   }
-  const name = fileName.split(".")[0].split("uv-")[1];
-  const version = parts[parts.length - 2];
-  return `${name}-${version}`;
-}
 
-async function getOrDownloadChecksum(
-  key: string,
-  downloadUrl: string,
-): Promise<string> {
-  let checksum = "";
-  if (key in KNOWN_CHECKSUMS) {
-    checksum = KNOWN_CHECKSUMS[key];
-  } else {
-    const content = await downloadAssetContent(downloadUrl);
-    checksum = content.split(" ")[0].trim();
-  }
-  return checksum;
-}
+  const body = [...deduplicatedEntries.entries()]
+    .map(([key, checksum]) => `  "${key}":\n    "${checksum}"`)
+    .join(",\n");
 
-async function downloadAssetContent(downloadUrl: string): Promise<string> {
-  const downloadPath = await tc.downloadTool(downloadUrl);
-  const content = await fs.readFile(downloadPath, "utf8");
-  return content;
+  const content =
+    "// AUTOGENERATED_DO_NOT_EDIT\n" +
+    "export const KNOWN_CHECKSUMS: { [key: string]: string } = {\n" +
+    body +
+    (body === "" ? "" : ",\n") +
+    "};\n";
+
+  await fs.writeFile(filePath, content);
 }

src/download/download-version.ts

@@ -2,20 +2,21 @@ import { promises as fs } from "node:fs";
 import * as path from "node:path";
 import * as core from "@actions/core";
 import * as tc from "@actions/tool-cache";
-import type { Endpoints } from "@octokit/types";
 import * as pep440 from "@renovatebot/pep440";
 import * as semver from "semver";
-import { OWNER, REPO, TOOL_CACHE_NAME } from "../utils/constants";
-import { Octokit } from "../utils/octokit";
+import { TOOL_CACHE_NAME, VERSIONS_NDJSON_URL } from "../utils/constants";
 import type { Architecture, Platform } from "../utils/platforms";
 import { validateChecksum } from "./checksum/checksum";
 import {
-  getDownloadUrl,
+  getAllVersions as getAllManifestVersions,
   getLatestKnownVersion as getLatestVersionInManifest,
+  getManifestArtifact,
 } from "./version-manifest";
-
-type Release =
-  Endpoints["GET /repos/{owner}/{repo}/releases"]["response"]["data"][number];
+import {
+  getAllVersions as getAllVersionsFromNdjson,
+  getArtifact as getArtifactFromNdjson,
+  getLatestVersion as getLatestVersionFromNdjson,
+} from "./versions-client";
 
 export function tryGetFromToolCache(
   arch: Architecture,
@@ -32,19 +33,26 @@ export function tryGetFromToolCache(
   return { installedPath, version: resolvedVersion };
 }
 
-export async function downloadVersionFromGithub(
+export async function downloadVersionFromNdjson(
   platform: Platform,
   arch: Architecture,
   version: string,
   checkSum: string | undefined,
   githubToken: string,
 ): Promise<{ version: string; cachedToolDir: string }> {
-  const artifact = `uv-${arch}-${platform}`;
-  const extension = getExtension(platform);
-  const downloadUrl = `https://github.com/${OWNER}/${REPO}/releases/download/${version}/${artifact}${extension}`;
+  const artifact = await getArtifactFromNdjson(version, arch, platform);
+
+  if (!artifact) {
+    throw new Error(
+      `Could not find artifact for version ${version}, arch ${arch}, platform ${platform} in ${VERSIONS_NDJSON_URL} .`,
+    );
+  }
+
+  // For the default astral-sh/versions source, checksum validation relies on
+  // user input or the built-in KNOWN_CHECKSUMS table, not NDJSON sha256 values.
   return await downloadVersion(
-    downloadUrl,
-    artifact,
+    artifact.url,
+    `uv-${arch}-${platform}`,
     platform,
     arch,
     version,
@@ -54,38 +62,32 @@ export async function downloadVersionFromGithub(
 }
 
 export async function downloadVersionFromManifest(
-  manifestUrl: string | undefined,
+  manifestUrl: string,
   platform: Platform,
   arch: Architecture,
   version: string,
   checkSum: string | undefined,
   githubToken: string,
 ): Promise<{ version: string; cachedToolDir: string }> {
-  const downloadUrl = await getDownloadUrl(
+  const artifact = await getManifestArtifact(
     manifestUrl,
     version,
     arch,
     platform,
   );
-  if (!downloadUrl) {
-    core.info(
-      `manifest-file does not contain version ${version}, arch ${arch}, platform ${platform}. Falling back to GitHub releases.`,
-    );
-    return await downloadVersionFromGithub(
-      platform,
-      arch,
-      version,
-      checkSum,
-      githubToken,
+  if (!artifact) {
+    throw new Error(
+      `manifest-file does not contain version ${version}, arch ${arch}, platform ${platform}.`,
     );
   }
+
   return await downloadVersion(
-    downloadUrl,
+    artifact.downloadUrl,
     `uv-${arch}-${platform}`,
     platform,
     arch,
     version,
-    checkSum,
+    resolveChecksum(checkSum, artifact.checksum),
     githubToken,
   );
 }
@@ -96,7 +98,7 @@ async function downloadVersion(
   platform: Platform,
   arch: Architecture,
   version: string,
-  checkSum: string | undefined,
+  checksum: string | undefined,
   githubToken: string,
 ): Promise<{ version: string; cachedToolDir: string }> {
   core.info(`Downloading uv from "${downloadUrl}" ...`);
@@ -105,19 +107,29 @@ async function downloadVersion(
     undefined,
     githubToken,
   );
-  await validateChecksum(checkSum, downloadPath, arch, platform, version);
+  await validateChecksum(checksum, downloadPath, arch, platform, version);
 
   let uvDir: string;
-  const extension = getExtension(platform);
   if (platform === "pc-windows-msvc") {
-    const fullPathWithExtension = `${downloadPath}${extension}`;
-    await fs.copyFile(downloadPath, fullPathWithExtension);
-    uvDir = await tc.extractZip(fullPathWithExtension);
-    // On windows extracting the zip does not create an intermediate directory
+    // On windows extracting the zip does not create an intermediate directory.
+    try {
+      // Try tar first as it's much faster, but only bsdtar supports zip files,
+      // so this may fail if another tar, like gnu tar, ends up being used.
+      uvDir = await tc.extractTar(downloadPath, undefined, "x");
+    } catch (err) {
+      core.info(
+        `Extracting with tar failed, falling back to zip extraction: ${(err as Error).message}`,
+      );
+      const extension = getExtension(platform);
+      const fullPathWithExtension = `${downloadPath}${extension}`;
+      await fs.copyFile(downloadPath, fullPathWithExtension);
+      uvDir = await tc.extractZip(fullPathWithExtension);
+    }
   } else {
     const extractedDir = await tc.extractTar(downloadPath);
     uvDir = path.join(extractedDir, artifactName);
   }
+
   const cachedToolDir = await tc.cacheDir(
     uvDir,
     TOOL_CACHE_NAME,
@@ -127,14 +139,22 @@ async function downloadVersion(
   return { cachedToolDir, version: version };
 }
 
+function resolveChecksum(
+  checkSum: string | undefined,
+  manifestChecksum?: string,
+): string | undefined {
+  return checkSum !== undefined && checkSum !== ""
+    ? checkSum
+    : manifestChecksum;
+}
+
 function getExtension(platform: Platform): string {
   return platform === "pc-windows-msvc" ? ".zip" : ".tar.gz";
 }
 
 export async function resolveVersion(
   versionInput: string,
-  manifestFile: string | undefined,
-  githubToken: string,
+  manifestUrl: string | undefined,
   resolutionStrategy: "highest" | "lowest" = "highest",
 ): Promise<string> {
   core.debug(`Resolving version: ${versionInput}`);
@@ -146,15 +166,15 @@ export async function resolveVersion(
   if (resolveVersionSpecifierToLatest) {
     core.info("Found minimum version specifier, using latest version");
   }
-  if (manifestFile) {
+  if (manifestUrl !== undefined) {
     version =
       versionInput === "latest" || resolveVersionSpecifierToLatest
-        ? await getLatestVersionInManifest(manifestFile)
+        ? await getLatestVersionInManifest(manifestUrl)
         : versionInput;
   } else {
     version =
       versionInput === "latest" || resolveVersionSpecifierToLatest
-        ? await getLatestVersion(githubToken)
+        ? await getLatestVersionFromNdjson()
         : versionInput;
   }
   if (tc.isExplicitVersion(version)) {
@@ -166,91 +186,33 @@ export async function resolveVersion(
     }
     return version;
   }
-  const availableVersions = await getAvailableVersions(githubToken);
+
+  const availableVersions = await getAvailableVersions(manifestUrl);
   core.debug(`Available versions: ${availableVersions}`);
   const resolvedVersion =
     resolutionStrategy === "lowest"
       ? minSatisfying(availableVersions, version)
       : maxSatisfying(availableVersions, version);
+
   if (resolvedVersion === undefined) {
     throw new Error(`No version found for ${version}`);
   }
+
   return resolvedVersion;
 }
 
-async function getAvailableVersions(githubToken: string): Promise<string[]> {
-  core.info("Getting available versions from GitHub API...");
-  try {
-    const octokit = new Octokit({
-      auth: githubToken,
-    });
-    return await getReleaseTagNames(octokit);
-  } catch (err) {
-    if ((err as Error).message.includes("Bad credentials")) {
-      core.info(
-        "No (valid) GitHub token provided. Falling back to anonymous. Requests might be rate limited.",
-      );
-      const octokit = new Octokit();
-      return await getReleaseTagNames(octokit);
-    }
-    throw err;
-  }
-}
-
-async function getReleaseTagNames(octokit: Octokit): Promise<string[]> {
-  const response: Release[] = await octokit.paginate(
-    octokit.rest.repos.listReleases,
-    {
-      owner: OWNER,
-      repo: REPO,
-    },
-  );
-  const releaseTagNames = response.map((release) => release.tag_name);
-  if (releaseTagNames.length === 0) {
-    throw Error(
-      "Github API request failed while getting releases. Check the GitHub status page for outages. Try again later.",
+async function getAvailableVersions(
+  manifestUrl: string | undefined,
+): Promise<string[]> {
+  if (manifestUrl !== undefined) {
+    core.info(
+      `Getting available versions from manifest-file ${manifestUrl} ...`,
     );
-  }
-  return releaseTagNames;
-}
-
-async function getLatestVersion(githubToken: string) {
-  core.info("Getting latest version from GitHub API...");
-  const octokit = new Octokit({
-    auth: githubToken,
-  });
-
-  let latestRelease: { tag_name: string } | undefined;
-  try {
-    latestRelease = await getLatestRelease(octokit);
-  } catch (err) {
-    if ((err as Error).message.includes("Bad credentials")) {
-      core.info(
-        "No (valid) GitHub token provided. Falling back to anonymous. Requests might be rate limited.",
-      );
-      const octokit = new Octokit();
-      latestRelease = await getLatestRelease(octokit);
-    } else {
-      core.error(
-        "Github API request failed while getting latest release. Check the GitHub status page for outages. Try again later.",
-      );
-      throw err;
-    }
+    return await getAllManifestVersions(manifestUrl);
   }
 
-  if (!latestRelease) {
-    throw new Error("Could not determine latest release.");
-  }
-  core.debug(`Latest version: ${latestRelease.tag_name}`);
-  return latestRelease.tag_name;
-}
-
-async function getLatestRelease(octokit: Octokit) {
-  const { data: latestRelease } = await octokit.rest.repos.getLatestRelease({
-    owner: OWNER,
-    repo: REPO,
-  });
-  return latestRelease;
+  core.info(`Getting available versions from ${VERSIONS_NDJSON_URL} ...`);
+  return await getAllVersionsFromNdjson();
 }
 
 function maxSatisfying(

src/download/legacy-version-manifest.ts

@@ -0,0 +1,80 @@
+import * as core from "@actions/core";
+
+export interface ManifestEntry {
+  arch: string;
+  platform: string;
+  version: string;
+  downloadUrl: string;
+  checksum?: string;
+  variant?: string;
+  archiveFormat?: string;
+}
+
+interface LegacyManifestEntry {
+  arch: string;
+  platform: string;
+  version: string;
+  downloadUrl: string;
+  checksum?: string;
+}
+
+const warnedLegacyManifestUrls = new Set<string>();
+
+export function parseLegacyManifestEntries(
+  parsedEntries: unknown[],
+  manifestUrl: string,
+): ManifestEntry[] {
+  warnAboutLegacyManifestFormat(manifestUrl);
+
+  return parsedEntries.map((entry, index) => {
+    if (!isLegacyManifestEntry(entry)) {
+      throw new Error(
+        `Invalid legacy manifest-file entry at index ${index} in ${manifestUrl}.`,
+      );
+    }
+
+    return {
+      arch: entry.arch,
+      checksum: entry.checksum,
+      downloadUrl: entry.downloadUrl,
+      platform: entry.platform,
+      version: entry.version,
+    };
+  });
+}
+
+export function clearLegacyManifestWarnings(): void {
+  warnedLegacyManifestUrls.clear();
+}
+
+function warnAboutLegacyManifestFormat(manifestUrl: string): void {
+  if (warnedLegacyManifestUrls.has(manifestUrl)) {
+    return;
+  }
+
+  warnedLegacyManifestUrls.add(manifestUrl);
+  core.warning(
+    `manifest-file ${manifestUrl} uses the legacy JSON array format, which is deprecated. Please migrate to the astral-sh/versions NDJSON format before the next major release.`,
+  );
+}
+
+function isLegacyManifestEntry(value: unknown): value is LegacyManifestEntry {
+  if (!isRecord(value)) {
+    return false;
+  }
+
+  const checksumIsValid =
+    typeof value.checksum === "string" || value.checksum === undefined;
+
+  return (
+    typeof value.arch === "string" &&
+    checksumIsValid &&
+    typeof value.downloadUrl === "string" &&
+    typeof value.platform === "string" &&
+    typeof value.version === "string"
+  );
+}
+
+function isRecord(value: unknown): value is Record<string, unknown> {
+  return typeof value === "object" && value !== null;
+}

src/download/variant-selection.ts

@@ -0,0 +1,39 @@
+interface VariantAwareEntry {
+  variant?: string;
+}
+
+export function selectDefaultVariant<T extends VariantAwareEntry>(
+  entries: T[],
+  duplicateEntryDescription: string,
+): T {
+  const firstEntry = entries[0];
+  if (firstEntry === undefined) {
+    throw new Error("selectDefaultVariant requires at least one candidate.");
+  }
+
+  if (entries.length === 1) {
+    return firstEntry;
+  }
+
+  const defaultEntries = entries.filter((entry) =>
+    isDefaultVariant(entry.variant),
+  );
+  if (defaultEntries.length === 1) {
+    return defaultEntries[0];
+  }
+
+  throw new Error(
+    `${duplicateEntryDescription} with variants ${formatVariants(entries)}. setup-uv currently requires a single default variant for duplicate platform entries.`,
+  );
+}
+
+function isDefaultVariant(variant: string | undefined): boolean {
+  return variant === undefined || variant === "default";
+}
+
+function formatVariants<T extends VariantAwareEntry>(entries: T[]): string {
+  return entries
+    .map((entry) => entry.variant ?? "default")
+    .sort((left, right) => left.localeCompare(right))
+    .join(", ");
+}

src/download/version-manifest.ts

@@ -1,91 +1,169 @@
-import { promises as fs } from "node:fs";
-import { join } from "node:path";
 import * as core from "@actions/core";
 import * as semver from "semver";
 import { fetch } from "../utils/fetch";
+import {
+  clearLegacyManifestWarnings,
+  type ManifestEntry,
+  parseLegacyManifestEntries,
+} from "./legacy-version-manifest";
+import { selectDefaultVariant } from "./variant-selection";
+import { type NdjsonVersion, parseVersionData } from "./versions-client";
 
-const localManifestFile = join(__dirname, "..", "..", "version-manifest.json");
-
-interface ManifestEntry {
-  version: string;
-  artifactName: string;
-  arch: string;
-  platform: string;
+export interface ManifestArtifact {
   downloadUrl: string;
+  checksum?: string;
+  archiveFormat?: string;
 }
 
+const cachedManifestEntries = new Map<string, ManifestEntry[]>();
+
 export async function getLatestKnownVersion(
-  manifestUrl: string | undefined,
+  manifestUrl: string,
 ): Promise<string> {
-  const manifestEntries = await getManifestEntries(manifestUrl);
-  return manifestEntries.reduce((a, b) =>
-    semver.gt(a.version, b.version) ? a : b,
-  ).version;
+  const versions = await getAllVersions(manifestUrl);
+  const latestVersion = versions.reduce((latest, current) =>
+    semver.gt(current, latest) ? current : latest,
+  );
+
+  return latestVersion;
 }
 
-export async function getDownloadUrl(
-  manifestUrl: string | undefined,
+export async function getAllVersions(manifestUrl: string): Promise<string[]> {
+  const manifestEntries = await getManifestEntries(manifestUrl);
+  return [...new Set(manifestEntries.map((entry) => entry.version))];
+}
+
+export async function getManifestArtifact(
+  manifestUrl: string,
   version: string,
   arch: string,
   platform: string,
-): Promise<string | undefined> {
+): Promise<ManifestArtifact | undefined> {
   const manifestEntries = await getManifestEntries(manifestUrl);
-  const entry = manifestEntries.find(
-    (entry) =>
-      entry.version === version &&
-      entry.arch === arch &&
-      entry.platform === platform,
+  const entry = selectManifestEntry(
+    manifestEntries,
+    manifestUrl,
+    version,
+    arch,
+    platform,
   );
-  return entry ? entry.downloadUrl : undefined;
+
+  if (!entry) {
+    return undefined;
+  }
+
+  return {
+    archiveFormat: entry.archiveFormat,
+    checksum: entry.checksum,
+    downloadUrl: entry.downloadUrl,
+  };
+}
+
+export function clearManifestCache(): void {
+  cachedManifestEntries.clear();
+  clearLegacyManifestWarnings();
 }
 
 async function getManifestEntries(
-  manifestUrl: string | undefined,
-): Promise<ManifestEntry[]> {
-  let data: string;
-  if (manifestUrl !== undefined) {
-    core.info(`Fetching manifest-file from: ${manifestUrl}`);
-    const response = await fetch(manifestUrl, {});
-    if (!response.ok) {
-      throw new Error(
-        `Failed to fetch manifest-file: ${response.status} ${response.statusText}`,
-      );
-    }
-    data = await response.text();
-  } else {
-    core.info("manifest-file not provided, reading from local file.");
-    const fileContent = await fs.readFile(localManifestFile);
-    data = fileContent.toString();
-  }
-
-  return JSON.parse(data);
-}
-
-export async function updateVersionManifest(
   manifestUrl: string,
-  downloadUrls: string[],
-): Promise<void> {
-  const manifest: ManifestEntry[] = [];
-
-  for (const downloadUrl of downloadUrls) {
-    const urlParts = downloadUrl.split("/");
-    const version = urlParts[urlParts.length - 2];
-    const artifactName = urlParts[urlParts.length - 1];
-    if (!artifactName.startsWith("uv-")) {
-      continue;
-    }
-    if (artifactName.startsWith("uv-installer")) {
-      continue;
-    }
-    const artifactParts = artifactName.split(".")[0].split("-");
-    manifest.push({
-      arch: artifactParts[1],
-      artifactName: artifactName,
-      downloadUrl: downloadUrl,
-      platform: artifactName.split(`uv-${artifactParts[1]}-`)[1].split(".")[0],
-      version: version,
-    });
+): Promise<ManifestEntry[]> {
+  const cachedEntries = cachedManifestEntries.get(manifestUrl);
+  if (cachedEntries !== undefined) {
+    core.debug(`Using cached manifest-file from: ${manifestUrl}`);
+    return cachedEntries;
+  }
+
+  core.info(`Fetching manifest-file from: ${manifestUrl}`);
+  const response = await fetch(manifestUrl, {});
+  if (!response.ok) {
+    throw new Error(
+      `Failed to fetch manifest-file: ${response.status} ${response.statusText}`,
+    );
+  }
+
+  const data = await response.text();
+  const parsedEntries = parseManifestEntries(data, manifestUrl);
+  cachedManifestEntries.set(manifestUrl, parsedEntries);
+
+  return parsedEntries;
+}
+
+function parseManifestEntries(
+  data: string,
+  manifestUrl: string,
+): ManifestEntry[] {
+  const trimmed = data.trim();
+  if (trimmed === "") {
+    throw new Error(`manifest-file at ${manifestUrl} is empty.`);
+  }
+
+  const parsedAsJson = tryParseJson(trimmed);
+  if (Array.isArray(parsedAsJson)) {
+    return parseLegacyManifestEntries(parsedAsJson, manifestUrl);
+  }
+
+  const versions = parseVersionData(trimmed, manifestUrl);
+  return mapNdjsonVersionsToManifestEntries(versions, manifestUrl);
+}
+
+function mapNdjsonVersionsToManifestEntries(
+  versions: NdjsonVersion[],
+  manifestUrl: string,
+): ManifestEntry[] {
+  const manifestEntries: ManifestEntry[] = [];
+
+  for (const versionData of versions) {
+    for (const artifact of versionData.artifacts) {
+      const [arch, ...platformParts] = artifact.platform.split("-");
+      if (arch === undefined || platformParts.length === 0) {
+        throw new Error(
+          `Invalid artifact platform '${artifact.platform}' in manifest-file ${manifestUrl}.`,
+        );
+      }
+
+      manifestEntries.push({
+        arch,
+        archiveFormat: artifact.archive_format,
+        checksum: artifact.sha256,
+        downloadUrl: artifact.url,
+        platform: platformParts.join("-"),
+        variant: artifact.variant,
+        version: versionData.version,
+      });
+    }
+  }
+
+  return manifestEntries;
+}
+
+function selectManifestEntry(
+  manifestEntries: ManifestEntry[],
+  manifestUrl: string,
+  version: string,
+  arch: string,
+  platform: string,
+): ManifestEntry | undefined {
+  const matches = manifestEntries.filter(
+    (candidate) =>
+      candidate.version === version &&
+      candidate.arch === arch &&
+      candidate.platform === platform,
+  );
+
+  if (matches.length === 0) {
+    return undefined;
+  }
+
+  return selectDefaultVariant(
+    matches,
+    `manifest-file ${manifestUrl} contains multiple artifacts for version ${version}, arch ${arch}, platform ${platform}`,
+  );
+}
+
+function tryParseJson(value: string): unknown {
+  try {
+    return JSON.parse(value);
+  } catch {
+    return undefined;
   }
-  core.debug(`Updating manifest-file: ${JSON.stringify(manifest)}`);
-  await fs.writeFile(manifestUrl, JSON.stringify(manifest));
 }

src/download/versions-client.ts

@@ -0,0 +1,191 @@
+import * as core from "@actions/core";
+import { VERSIONS_NDJSON_URL } from "../utils/constants";
+import { fetch } from "../utils/fetch";
+import { selectDefaultVariant } from "./variant-selection";
+
+export interface NdjsonArtifact {
+  platform: string;
+  variant?: string;
+  url: string;
+  archive_format: string;
+  sha256: string;
+}
+
+export interface NdjsonVersion {
+  version: string;
+  artifacts: NdjsonArtifact[];
+}
+
+export interface ArtifactResult {
+  url: string;
+  sha256: string;
+  archiveFormat: string;
+}
+
+const cachedVersionData = new Map<string, NdjsonVersion[]>();
+
+export async function fetchVersionData(
+  url: string = VERSIONS_NDJSON_URL,
+): Promise<NdjsonVersion[]> {
+  const cachedVersions = cachedVersionData.get(url);
+  if (cachedVersions !== undefined) {
+    core.debug(`Using cached NDJSON version data from ${url}`);
+    return cachedVersions;
+  }
+
+  core.info(`Fetching version data from ${url} ...`);
+  const response = await fetch(url, {});
+  if (!response.ok) {
+    throw new Error(
+      `Failed to fetch version data: ${response.status} ${response.statusText}`,
+    );
+  }
+
+  const body = await response.text();
+  const versions = parseVersionData(body, url);
+  cachedVersionData.set(url, versions);
+  return versions;
+}
+
+export function parseVersionData(
+  data: string,
+  sourceDescription: string,
+): NdjsonVersion[] {
+  const versions: NdjsonVersion[] = [];
+
+  for (const [index, line] of data.split("\n").entries()) {
+    const trimmed = line.trim();
+    if (trimmed === "") {
+      continue;
+    }
+
+    let parsed: unknown;
+    try {
+      parsed = JSON.parse(trimmed);
+    } catch (error) {
+      throw new Error(
+        `Failed to parse version data from ${sourceDescription} at line ${index + 1}: ${(error as Error).message}`,
+      );
+    }
+
+    if (!isNdjsonVersion(parsed)) {
+      throw new Error(
+        `Invalid NDJSON record in ${sourceDescription} at line ${index + 1}.`,
+      );
+    }
+
+    versions.push(parsed);
+  }
+
+  if (versions.length === 0) {
+    throw new Error(`No version data found in ${sourceDescription}.`);
+  }
+
+  return versions;
+}
+
+export async function getLatestVersion(): Promise<string> {
+  const versions = await fetchVersionData();
+  const latestVersion = versions[0]?.version;
+  if (!latestVersion) {
+    throw new Error("No versions found in NDJSON data");
+  }
+
+  core.debug(`Latest version from NDJSON: ${latestVersion}`);
+  return latestVersion;
+}
+
+export async function getAllVersions(): Promise<string[]> {
+  const versions = await fetchVersionData();
+  return versions.map((versionData) => versionData.version);
+}
+
+export async function getArtifact(
+  version: string,
+  arch: string,
+  platform: string,
+): Promise<ArtifactResult | undefined> {
+  const versions = await fetchVersionData();
+  const versionData = versions.find(
+    (candidate) => candidate.version === version,
+  );
+  if (!versionData) {
+    core.debug(`Version ${version} not found in NDJSON data`);
+    return undefined;
+  }
+
+  const targetPlatform = `${arch}-${platform}`;
+  const matchingArtifacts = versionData.artifacts.filter(
+    (candidate) => candidate.platform === targetPlatform,
+  );
+
+  if (matchingArtifacts.length === 0) {
+    core.debug(
+      `Artifact for ${targetPlatform} not found in version ${version}. Available platforms: ${versionData.artifacts
+        .map((candidate) => candidate.platform)
+        .join(", ")}`,
+    );
+    return undefined;
+  }
+
+  const artifact = selectArtifact(matchingArtifacts, version, targetPlatform);
+
+  return {
+    archiveFormat: artifact.archive_format,
+    sha256: artifact.sha256,
+    url: artifact.url,
+  };
+}
+
+export function clearCache(url?: string): void {
+  if (url === undefined) {
+    cachedVersionData.clear();
+    return;
+  }
+
+  cachedVersionData.delete(url);
+}
+
+function selectArtifact(
+  artifacts: NdjsonArtifact[],
+  version: string,
+  targetPlatform: string,
+): NdjsonArtifact {
+  return selectDefaultVariant(
+    artifacts,
+    `Multiple artifacts found for ${targetPlatform} in version ${version}`,
+  );
+}
+
+function isNdjsonVersion(value: unknown): value is NdjsonVersion {
+  if (!isRecord(value)) {
+    return false;
+  }
+
+  if (typeof value.version !== "string" || !Array.isArray(value.artifacts)) {
+    return false;
+  }
+
+  return value.artifacts.every(isNdjsonArtifact);
+}
+
+function isNdjsonArtifact(value: unknown): value is NdjsonArtifact {
+  if (!isRecord(value)) {
+    return false;
+  }
+
+  const variantIsValid =
+    typeof value.variant === "string" || value.variant === undefined;
+
+  return (
+    typeof value.archive_format === "string" &&
+    typeof value.platform === "string" &&
+    typeof value.sha256 === "string" &&
+    typeof value.url === "string" &&
+    variantIsValid
+  );
+}
+
+function isRecord(value: unknown): value is Record<string, unknown> {
+  return typeof value === "object" && value !== null;
+}

src/save-cache.ts

@@ -6,6 +6,7 @@ import * as pep440 from "@renovatebot/pep440";
 import {
   STATE_CACHE_KEY,
   STATE_CACHE_MATCHED_KEY,
+  STATE_PYTHON_CACHE_MATCHED_KEY,
 } from "./cache/restore-cache";
 import { STATE_UV_PATH, STATE_UV_VERSION } from "./utils/constants";
 import {
@@ -26,6 +27,9 @@ export async function run(): Promise<void> {
       } else {
         core.info("save-cache is false. Skipping save cache step.");
       }
+      // https://github.com/nodejs/node/issues/56645#issuecomment-3077594952
+      await new Promise((resolve) => setTimeout(resolve, 50));
+
       // node will stay alive if any promises are not resolved,
       // which is a possibility if HTTP requests are dangling
       // due to retries or timeouts. We know that if we got here
@@ -49,56 +53,48 @@ async function saveCache(): Promise<void> {
   }
   if (matchedKey === cacheKey) {
     core.info(`Cache hit occurred on key ${cacheKey}, not saving cache.`);
-    return;
-  }
-
-  if (shouldPruneCache) {
-    await pruneCache();
-  }
-
-  let actualCachePath = cacheLocalPath;
-  if (process.env.UV_CACHE_DIR && process.env.UV_CACHE_DIR !== cacheLocalPath) {
-    core.warning(
-      `The environment variable UV_CACHE_DIR has been changed to "${process.env.UV_CACHE_DIR}", by an action or step running after astral-sh/setup-uv. This can lead to unexpected behavior. If you expected this to happen set the cache-local-path input to "${process.env.UV_CACHE_DIR}" instead of "${cacheLocalPath}".`,
-    );
-    actualCachePath = process.env.UV_CACHE_DIR;
-  }
-
-  core.info(`Saving cache path: ${actualCachePath}`);
-  if (!fs.existsSync(actualCachePath) && !ignoreNothingToCache) {
-    throw new Error(
-      `Cache path ${actualCachePath} does not exist on disk. This likely indicates that there are no dependencies to cache. Consider disabling the cache input if it is not needed.`,
-    );
-  }
-
-  const cachePaths = [actualCachePath];
-  if (cachePython) {
-    core.info(`Including Python cache path: ${pythonDir}`);
-    if (!fs.existsSync(pythonDir) && !ignoreNothingToCache) {
-      throw new Error(
-        `Python cache path ${pythonDir} does not exist on disk. This likely indicates that there are no dependencies to cache. Consider disabling the cache input if it is not needed.`,
-      );
+  } else {
+    if (shouldPruneCache) {
+      await pruneCache();
     }
-    cachePaths.push(pythonDir);
-  }
 
-  core.info(`Final cache paths: ${cachePaths.join(", ")}`);
-  try {
-    await cache.saveCache(cachePaths, cacheKey);
-    core.info(`cache saved with the key: ${cacheKey}`);
-  } catch (e) {
-    if (
-      e instanceof Error &&
-      e.message ===
-        "Path Validation Error: Path(s) specified in the action for caching do(es) not exist, hence no cache is being saved."
-    ) {
-      core.info(
-        "No cacheable paths were found. Ignoring because ignore-nothing-to-save is enabled.",
-      );
+    const actualCachePath = getUvCachePath();
+    if (!fs.existsSync(actualCachePath)) {
+      if (ignoreNothingToCache) {
+        core.info(
+          "No cacheable uv cache paths were found. Ignoring because ignore-nothing-to-cache is enabled.",
+        );
+      } else {
+        throw new Error(
+          `Cache path ${actualCachePath} does not exist on disk. This likely indicates that there are no dependencies to cache. Consider disabling the cache input if it is not needed.`,
+        );
+      }
     } else {
-      throw e;
+      await saveCacheToKey(
+        cacheKey,
+        actualCachePath,
+        STATE_CACHE_MATCHED_KEY,
+        "uv cache",
+      );
     }
   }
+
+  if (cachePython) {
+    if (!fs.existsSync(pythonDir)) {
+      core.warning(
+        `Python cache path ${pythonDir} does not exist on disk. Skipping Python cache save because no managed Python installation was found. If you want uv to install managed Python instead of using a system interpreter, set UV_PYTHON_PREFERENCE=only-managed.`,
+      );
+      return;
+    }
+
+    const pythonCacheKey = `${cacheKey}-python`;
+    await saveCacheToKey(
+      pythonCacheKey,
+      pythonDir,
+      STATE_PYTHON_CACHE_MATCHED_KEY,
+      "Python cache",
+    );
+  }
 }
 
 async function pruneCache(): Promise<void> {
@@ -117,4 +113,42 @@ async function pruneCache(): Promise<void> {
   await exec.exec(uvPath, execArgs, options);
 }
 
+function getUvCachePath(): string {
+  if (cacheLocalPath === undefined) {
+    throw new Error(
+      "cache-local-path is not set. Cannot save cache without a valid cache path.",
+    );
+  }
+  if (
+    process.env.UV_CACHE_DIR &&
+    process.env.UV_CACHE_DIR !== cacheLocalPath.path
+  ) {
+    core.warning(
+      `The environment variable UV_CACHE_DIR has been changed to "${process.env.UV_CACHE_DIR}", by an action or step running after astral-sh/setup-uv. This can lead to unexpected behavior. If you expected this to happen set the cache-local-path input to "${process.env.UV_CACHE_DIR}" instead of "${cacheLocalPath.path}".`,
+    );
+    return process.env.UV_CACHE_DIR;
+  }
+  return cacheLocalPath.path;
+}
+
+async function saveCacheToKey(
+  cacheKey: string,
+  cachePath: string,
+  stateKey: string,
+  cacheName: string,
+): Promise<void> {
+  const matchedKey = core.getState(stateKey);
+
+  if (matchedKey === cacheKey) {
+    core.info(
+      `${cacheName} hit occurred on key ${cacheKey}, not saving cache.`,
+    );
+    return;
+  }
+
+  core.info(`Including ${cacheName} path: ${cachePath}`);
+  await cache.saveCache([cachePath], cacheKey);
+  core.info(`${cacheName} saved with key: ${cacheKey}`);
+}
+
 run();

src/setup-uv.ts

@@ -5,14 +5,15 @@ import * as exec from "@actions/exec";
 import { restoreCache } from "./cache/restore-cache";
 import {
   downloadVersionFromManifest,
+  downloadVersionFromNdjson,
   resolveVersion,
   tryGetFromToolCache,
 } from "./download/download-version";
-import { getConfigValueFromTomlFile } from "./utils/config-file";
 import { STATE_UV_PATH, STATE_UV_VERSION } from "./utils/constants";
 import {
   activateEnvironment as activateEnvironmentInput,
   addProblemMatchers,
+  CacheLocalSource,
   cacheLocalPath,
   checkSum,
   enableCache,
@@ -24,6 +25,7 @@ import {
   resolutionStrategy,
   toolBinDir,
   toolDir,
+  venvPath,
   versionFile as versionFileInput,
   version as versionInput,
   workingDirectory,
@@ -36,6 +38,37 @@ import {
 } from "./utils/platforms";
 import { getUvVersionFromFile } from "./version/resolve";
 
+async function getPythonVersion(): Promise<string> {
+  if (pythonVersion !== "") {
+    return pythonVersion;
+  }
+
+  let output = "";
+  const options: exec.ExecOptions = {
+    listeners: {
+      stdout: (data: Buffer) => {
+        output += data.toString();
+      },
+    },
+    silent: !core.isDebug(),
+  };
+
+  try {
+    const execArgs = ["python", "find", "--directory", workingDirectory];
+    await exec.exec("uv", execArgs, options);
+    const pythonPath = output.trim();
+
+    output = "";
+    await exec.exec(pythonPath, ["--version"], options);
+    // output is like "Python 3.8.10"
+    return output.split(" ")[1].trim();
+  } catch (error) {
+    const err = error as Error;
+    core.debug(`Failed to get python version from uv. Error: ${err.message}`);
+    return "unknown";
+  }
+}
+
 async function run(): Promise<void> {
   detectEmptyWorkdir();
   const platform = await getPlatform();
@@ -63,9 +96,14 @@ async function run(): Promise<void> {
     core.saveState(STATE_UV_VERSION, setupResult.version);
     core.info(`Successfully installed uv version ${setupResult.version}`);
 
+    const pythonVersion = await getPythonVersion();
+    core.setOutput("python-version", pythonVersion);
+
     if (enableCache) {
-      await restoreCache();
+      await restoreCache(pythonVersion);
     }
+    // https://github.com/nodejs/node/issues/56645#issuecomment-3077594952
+    await new Promise((resolve) => setTimeout(resolve, 50));
     process.exit(0);
   } catch (err) {
     core.setFailed((err as Error).message);
@@ -102,14 +140,23 @@ async function setupUv(
     };
   }
 
-  const downloadVersionResult = await downloadVersionFromManifest(
-    manifestFile,
-    platform,
-    arch,
-    resolvedVersion,
-    checkSum,
-    githubToken,
-  );
+  const downloadVersionResult =
+    manifestFile !== undefined
+      ? await downloadVersionFromManifest(
+          manifestFile,
+          platform,
+          arch,
+          resolvedVersion,
+          checkSum,
+          githubToken,
+        )
+      : await downloadVersionFromNdjson(
+          platform,
+          arch,
+          resolvedVersion,
+          checkSum,
+          githubToken,
+        );
 
   return {
     uvDir: downloadVersionResult.cachedToolDir,
@@ -121,12 +168,7 @@ async function determineVersion(
   manifestFile: string | undefined,
 ): Promise<string> {
   if (versionInput !== "") {
-    return await resolveVersion(
-      versionInput,
-      manifestFile,
-      githubToken,
-      resolutionStrategy,
-    );
+    return await resolveVersion(versionInput, manifestFile, resolutionStrategy);
   }
   if (versionFileInput !== "") {
     const versionFromFile = getUvVersionFromFile(versionFileInput);
@@ -138,7 +180,6 @@ async function determineVersion(
     return await resolveVersion(
       versionFromFile,
       manifestFile,
-      githubToken,
       resolutionStrategy,
     );
   }
@@ -156,7 +197,6 @@ async function determineVersion(
   return await resolveVersion(
     versionFromUvToml || versionFromPyproject || "latest",
     manifestFile,
-    githubToken,
     resolutionStrategy,
   );
 }
@@ -233,12 +273,16 @@ async function activateEnvironment(): Promise<void> {
         "UV_NO_MODIFY_PATH and activate-environment cannot be used together.",
       );
     }
-    const execArgs = ["venv", ".venv", "--directory", workingDirectory];
 
-    core.info("Activating python venv...");
-    await exec.exec("uv", execArgs);
+    core.info(`Creating and activating python venv at ${venvPath}...`);
+    await exec.exec("uv", [
+      "venv",
+      venvPath,
+      "--directory",
+      workingDirectory,
+      "--clear",
+    ]);
 
-    const venvPath = path.resolve(`${workingDirectory}${path.sep}.venv`);
     let venvBinPath = `${venvPath}${path.sep}bin`;
     if (process.platform === "win32") {
       venvBinPath = `${venvPath}${path.sep}Scripts`;
@@ -250,16 +294,15 @@ async function activateEnvironment(): Promise<void> {
 }
 
 function setCacheDir(): void {
-  if (enableCache) {
-    const cacheDirFromConfig = getConfigValueFromTomlFile("", "cache-dir");
-    if (cacheDirFromConfig !== undefined) {
+  if (cacheLocalPath !== undefined) {
+    if (cacheLocalPath.source === CacheLocalSource.Config) {
       core.info(
         "Using cache-dir from uv config file, not modifying UV_CACHE_DIR",
       );
       return;
     }
-    core.exportVariable("UV_CACHE_DIR", cacheLocalPath);
-    core.info(`Set UV_CACHE_DIR to ${cacheLocalPath}`);
+    core.exportVariable("UV_CACHE_DIR", cacheLocalPath.path);
+    core.info(`Set UV_CACHE_DIR to ${cacheLocalPath.path}`);
   }
 }
 

src/update-known-checksums.ts

@@ -0,0 +1,81 @@
+import * as core from "@actions/core";
+import * as semver from "semver";
+import { KNOWN_CHECKSUMS } from "./download/checksum/known-checksums";
+import {
+  type ChecksumEntry,
+  updateChecksums,
+} from "./download/checksum/update-known-checksums";
+import {
+  fetchVersionData,
+  getLatestVersion,
+  type NdjsonVersion,
+} from "./download/versions-client";
+
+const VERSION_IN_CHECKSUM_KEY_PATTERN =
+  /-(\d+\.\d+\.\d+(?:[-+][0-9A-Za-z.-]+)?)$/;
+
+async function run(): Promise<void> {
+  const checksumFilePath = process.argv.slice(2)[0];
+  if (!checksumFilePath) {
+    throw new Error(
+      "Missing checksum file path. Usage: node dist/update-known-checksums/index.js <checksum-file-path>",
+    );
+  }
+
+  const latestVersion = await getLatestVersion();
+  const latestKnownVersion = getLatestKnownVersionFromChecksums();
+
+  if (semver.lte(latestVersion, latestKnownVersion)) {
+    core.info(
+      `Latest release (${latestVersion}) is not newer than the latest known version (${latestKnownVersion}). Skipping update.`,
+    );
+    return;
+  }
+
+  const versions = await fetchVersionData();
+  const checksumEntries = extractChecksumsFromNdjson(versions);
+  await updateChecksums(checksumFilePath, checksumEntries);
+
+  core.setOutput("latest-version", latestVersion);
+}
+
+function getLatestKnownVersionFromChecksums(): string {
+  const versions = new Set<string>();
+
+  for (const key of Object.keys(KNOWN_CHECKSUMS)) {
+    const version = extractVersionFromChecksumKey(key);
+    if (version !== undefined) {
+      versions.add(version);
+    }
+  }
+
+  const latestVersion = [...versions].sort(semver.rcompare)[0];
+  if (!latestVersion) {
+    throw new Error("Could not determine latest known version from checksums.");
+  }
+
+  return latestVersion;
+}
+
+function extractVersionFromChecksumKey(key: string): string | undefined {
+  return key.match(VERSION_IN_CHECKSUM_KEY_PATTERN)?.[1];
+}
+
+function extractChecksumsFromNdjson(
+  versions: NdjsonVersion[],
+): ChecksumEntry[] {
+  const checksums: ChecksumEntry[] = [];
+
+  for (const version of versions) {
+    for (const artifact of version.artifacts) {
+      checksums.push({
+        checksum: artifact.sha256,
+        key: `${artifact.platform}-${version.version}`,
+      });
+    }
+  }
+
+  return checksums;
+}
+
+run();

src/update-known-versions.ts

@@ -1,63 +0,0 @@
-import * as core from "@actions/core";
-import type { Endpoints } from "@octokit/types";
-import * as semver from "semver";
-import { updateChecksums } from "./download/checksum/update-known-checksums";
-import {
-  getLatestKnownVersion,
-  updateVersionManifest,
-} from "./download/version-manifest";
-import { OWNER, REPO } from "./utils/constants";
-import { Octokit } from "./utils/octokit";
-
-type Release =
-  Endpoints["GET /repos/{owner}/{repo}/releases"]["response"]["data"][number];
-
-async function run(): Promise<void> {
-  const checksumFilePath = process.argv.slice(2)[0];
-  const versionsManifestFile = process.argv.slice(2)[1];
-  const githubToken = process.argv.slice(2)[2];
-
-  const octokit = new Octokit({
-    auth: githubToken,
-  });
-
-  const { data: latestRelease } = await octokit.rest.repos.getLatestRelease({
-    owner: OWNER,
-    repo: REPO,
-  });
-
-  const latestKnownVersion = await getLatestKnownVersion(undefined);
-
-  if (semver.lte(latestRelease.tag_name, latestKnownVersion)) {
-    core.info(
-      `Latest release (${latestRelease.tag_name}) is not newer than the latest known version (${latestKnownVersion}). Skipping update.`,
-    );
-    return;
-  }
-
-  const releases: Release[] = await octokit.paginate(
-    octokit.rest.repos.listReleases,
-    {
-      owner: OWNER,
-      repo: REPO,
-    },
-  );
-  const checksumDownloadUrls: string[] = releases.flatMap((release) =>
-    release.assets
-      .filter((asset) => asset.name.endsWith(".sha256"))
-      .map((asset) => asset.browser_download_url),
-  );
-  await updateChecksums(checksumFilePath, checksumDownloadUrls);
-
-  const artifactDownloadUrls: string[] = releases.flatMap((release) =>
-    release.assets
-      .filter((asset) => !asset.name.endsWith(".sha256"))
-      .map((asset) => asset.browser_download_url),
-  );
-
-  await updateVersionManifest(versionsManifestFile, artifactDownloadUrls);
-
-  core.setOutput("latest-version", latestRelease.tag_name);
-}
-
-run();

src/utils/constants.ts

@@ -1,5 +1,5 @@
-export const REPO = "uv";
-export const OWNER = "astral-sh";
 export const TOOL_CACHE_NAME = "uv";
 export const STATE_UV_PATH = "uv-path";
 export const STATE_UV_VERSION = "uv-version";
+export const VERSIONS_NDJSON_URL =
+  "https://raw.githubusercontent.com/astral-sh/versions/main/v1/uv.ndjson";

src/utils/inputs.ts

@@ -2,11 +2,19 @@ import path from "node:path";
 import * as core from "@actions/core";
 import { getConfigValueFromTomlFile } from "./config-file";
 
+export enum CacheLocalSource {
+  Input,
+  Config,
+  Env,
+  Default,
+}
+
 export const workingDirectory = core.getInput("working-directory");
 export const version = core.getInput("version");
 export const versionFile = getVersionFile();
 export const pythonVersion = core.getInput("python-version");
 export const activateEnvironment = core.getBooleanInput("activate-environment");
+export const venvPath = getVenvPath();
 export const checkSum = core.getInput("checksum");
 export const enableCache = getEnableCache();
 export const restoreCache = core.getInput("restore-cache") === "true";
@@ -38,6 +46,18 @@ function getVersionFile(): string {
   return versionFileInput;
 }
 
+function getVenvPath(): string {
+  const venvPathInput = core.getInput("venv-path");
+  if (venvPathInput !== "") {
+    if (!activateEnvironment) {
+      core.warning("venv-path is only used when activate-environment is true");
+    }
+    const tildeExpanded = expandTilde(venvPathInput);
+    return normalizePath(resolveRelativePath(tildeExpanded));
+  }
+  return normalizePath(resolveRelativePath(".venv"));
+}
+
 function getEnableCache(): boolean {
   const enableCacheInput = core.getInput("enable-cache");
   if (enableCacheInput === "auto") {
@@ -80,32 +100,51 @@ function getToolDir(): string | undefined {
   return undefined;
 }
 
-function getCacheLocalPath(): string {
+function getCacheLocalPath():
+  | {
+      path: string;
+      source: CacheLocalSource;
+    }
+  | undefined {
   const cacheLocalPathInput = core.getInput("cache-local-path");
   if (cacheLocalPathInput !== "") {
     const tildeExpanded = expandTilde(cacheLocalPathInput);
-    return resolveRelativePath(tildeExpanded);
+    return {
+      path: resolveRelativePath(tildeExpanded),
+      source: CacheLocalSource.Input,
+    };
   }
   const cacheDirFromConfig = getCacheDirFromConfig();
   if (cacheDirFromConfig !== undefined) {
-    return cacheDirFromConfig;
+    return { path: cacheDirFromConfig, source: CacheLocalSource.Config };
   }
   if (process.env.UV_CACHE_DIR !== undefined) {
     core.info(`UV_CACHE_DIR is already set to ${process.env.UV_CACHE_DIR}`);
-    return process.env.UV_CACHE_DIR;
+    return { path: process.env.UV_CACHE_DIR, source: CacheLocalSource.Env };
   }
-  if (process.env.RUNNER_ENVIRONMENT === "github-hosted") {
-    if (process.env.RUNNER_TEMP !== undefined) {
-      return `${process.env.RUNNER_TEMP}${path.sep}setup-uv-cache`;
+  if (getEnableCache()) {
+    if (process.env.RUNNER_ENVIRONMENT === "github-hosted") {
+      if (process.env.RUNNER_TEMP !== undefined) {
+        return {
+          path: `${process.env.RUNNER_TEMP}${path.sep}setup-uv-cache`,
+          source: CacheLocalSource.Default,
+        };
+      }
+      throw Error(
+        "Could not determine UV_CACHE_DIR. Please make sure RUNNER_TEMP is set or provide the cache-local-path input",
+      );
     }
-    throw Error(
-      "Could not determine UV_CACHE_DIR. Please make sure RUNNER_TEMP is set or provide the cache-local-path input",
-    );
+    if (process.platform === "win32") {
+      return {
+        path: `${process.env.APPDATA}${path.sep}uv${path.sep}cache`,
+        source: CacheLocalSource.Default,
+      };
+    }
+    return {
+      path: `${process.env.HOME}${path.sep}.cache${path.sep}uv`,
+      source: CacheLocalSource.Default,
+    };
   }
-  if (process.platform === "win32") {
-    return `${process.env.APPDATA}${path.sep}uv${path.sep}cache`;
-  }
-  return `${process.env.HOME}${path.sep}.cache${path.sep}uv`;
 }
 
 function getCacheDirFromConfig(): string | undefined {
@@ -129,7 +168,7 @@ function getCacheDirFromConfig(): string | undefined {
 export function getUvPythonDir(): string {
   if (process.env.UV_PYTHON_INSTALL_DIR !== undefined) {
     core.info(
-      `UV_PYTHON_INSTALL_DIR is already set to  ${process.env.UV_PYTHON_INSTALL_DIR}`,
+      `UV_PYTHON_INSTALL_DIR is already set to ${process.env.UV_PYTHON_INSTALL_DIR}`,
     );
     return process.env.UV_PYTHON_INSTALL_DIR;
   }
@@ -168,6 +207,19 @@ function expandTilde(input: string): string {
   return input;
 }
 
+function normalizePath(inputPath: string): string {
+  const normalized = path.normalize(inputPath);
+  const root = path.parse(normalized).root;
+
+  // Remove any trailing path separators, except when the whole path is the root.
+  let trimmed = normalized;
+  while (trimmed.length > root.length && trimmed.endsWith(path.sep)) {
+    trimmed = trimmed.slice(0, -1);
+  }
+
+  return trimmed;
+}
+
 function resolveRelativePath(inputPath: string): string {
   const hasNegation = inputPath.startsWith("!");
   const pathWithoutNegation = hasNegation ? inputPath.substring(1) : inputPath;

src/utils/octokit.ts

@@ -1,34 +0,0 @@
-import type { OctokitOptions } from "@octokit/core";
-import { Octokit as Core } from "@octokit/core";
-import {
-  type PaginateInterface,
-  paginateRest,
-} from "@octokit/plugin-paginate-rest";
-import { legacyRestEndpointMethods } from "@octokit/plugin-rest-endpoint-methods";
-import { fetch as customFetch } from "./fetch";
-
-export type { RestEndpointMethodTypes } from "@octokit/plugin-rest-endpoint-methods";
-
-const DEFAULTS = {
-  baseUrl: "https://api.github.com",
-  userAgent: "setup-uv",
-};
-
-const OctokitWithPlugins = Core.plugin(paginateRest, legacyRestEndpointMethods);
-
-export const Octokit = OctokitWithPlugins.defaults(function buildDefaults(
-  options: OctokitOptions,
-): OctokitOptions {
-  return {
-    ...DEFAULTS,
-    ...options,
-    request: {
-      fetch: customFetch,
-      ...options.request,
-    },
-  };
-});
-
-export type Octokit = InstanceType<typeof OctokitWithPlugins> & {
-  paginate: PaginateInterface;
-};

src/utils/platforms.ts

@@ -1,3 +1,5 @@
+import fs from "node:fs";
+import os from "node:os";
 import * as core from "@actions/core";
 import * as exec from "@actions/exec";
 export type Platform =
@@ -11,6 +13,7 @@ export type Architecture =
   | "x86_64"
   | "aarch64"
   | "s390x"
+  | "riscv64gc"
   | "powerpc64le";
 
 export function getArch(): Architecture | undefined {
@@ -19,6 +22,7 @@ export function getArch(): Architecture | undefined {
     arm64: "aarch64",
     ia32: "i686",
     ppc64: "powerpc64le",
+    riscv64: "riscv64gc",
     s390x: "s390x",
     x64: "x86_64",
   };
@@ -74,3 +78,77 @@ async function isMuslOs(): Promise<boolean> {
     return false;
   }
 }
+
+/**
+ * Returns OS name and version for cache key differentiation.
+ * Examples: "ubuntu-22.04", "macos-14", "windows-2022"
+ * Throws if OS detection fails.
+ */
+export function getOSNameVersion(): string {
+  const platform = process.platform;
+
+  if (platform === "linux") {
+    return getLinuxOSNameVersion();
+  }
+  if (platform === "darwin") {
+    return getMacOSNameVersion();
+  }
+  if (platform === "win32") {
+    return getWindowsNameVersion();
+  }
+
+  throw new Error(`Unsupported platform: ${platform}`);
+}
+
+function getLinuxOSNameVersion(): string {
+  const files = ["/etc/os-release", "/usr/lib/os-release"];
+
+  for (const file of files) {
+    try {
+      const content = fs.readFileSync(file, "utf8");
+      const id = parseOsReleaseValue(content, "ID");
+      const versionId = parseOsReleaseValue(content, "VERSION_ID");
+      // Fallback for rolling releases (debian:unstable/testing, arch, etc.)
+      // that don't have VERSION_ID but have VERSION_CODENAME
+      const versionCodename = parseOsReleaseValue(content, "VERSION_CODENAME");
+
+      if (id && versionId) {
+        return `${id}-${versionId}`;
+      }
+      if (id && versionCodename) {
+        return `${id}-${versionCodename}`;
+      }
+    } catch {
+      // Try next file
+    }
+  }
+
+  throw new Error(
+    "Failed to determine Linux distribution. " +
+      "Could not read /etc/os-release or /usr/lib/os-release",
+  );
+}
+
+function parseOsReleaseValue(content: string, key: string): string | undefined {
+  const regex = new RegExp(`^${key}=["']?([^"'\\n]*)["']?$`, "m");
+  const match = content.match(regex);
+  return match?.[1];
+}
+
+function getMacOSNameVersion(): string {
+  const darwinVersion = Number.parseInt(os.release().split(".")[0], 10);
+  if (Number.isNaN(darwinVersion)) {
+    throw new Error(`Failed to parse macOS version from: ${os.release()}`);
+  }
+  const macosVersion = darwinVersion - 9;
+  return `macos-${macosVersion}`;
+}
+
+function getWindowsNameVersion(): string {
+  const version = os.version();
+  const match = version.match(/Windows(?: Server)? (\d+)/);
+  if (!match) {
+    throw new Error(`Failed to parse Windows version from: ${version}`);
+  }
+  return `windows-${match[1]}`;
+}

tsconfig.json

@@ -6,7 +6,7 @@
     "outDir": "./lib" /* Redirect output structure to the directory. */,
     "rootDir": "./src" /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */,
     "strict": true /* Enable all strict type-checking options. */,
-    "target": "ES2024" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
+    "target": "ES2022" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
   },
   "exclude": ["node_modules", "**/*.test.ts"]
 }