Respect UV_CACHE_DIR and cache-dir (#612)

Fixes: #583

.github/workflows/test.yml

@@ -599,6 +599,7 @@ jobs:
       - name: Setup with cache
         uses: ./
         with:
+          enable-cache: true
           cache-suffix: ${{ github.run_id }}-${{ github.run_attempt }}-test-cache-local
       - run: |
           if [ "$UV_CACHE_DIR" != "${{ matrix.inputs.expected-cache-dir }}" ]; then
@@ -607,6 +608,25 @@ jobs:
           fi
         shell: bash
 
+  test-cache-local-cache-disabled:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          persist-credentials: false
+      - name: Setup without cache
+        uses: ./
+        with:
+          enable-cache: false
+
+      - name: Check UV_CACHE_DIR is not set
+        run: |
+          if [ -n "$UV_CACHE_DIR" ]; then
+            echo "UV_CACHE_DIR should not be set when cache is disabled: $UV_CACHE_DIR"
+            exit 1
+          fi
+        shell: bash
+
   test-setup-cache-local:
     runs-on: selfhosted-ubuntu-arm64
     steps:
@@ -791,6 +811,31 @@ jobs:
       - run: uv run long-running.py &
         working-directory: __tests__/fixtures/uv-project
 
+  test-cache-dir-from-file:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          persist-credentials: false
+      - name: Verify uv cache dir is not populated
+        run: |
+          if [ -f "/tmp/pyproject-toml-defined-cache-path/CACHEDIR.TAG" ]; then
+            echo "Cache dir should not exist"
+            exit 1
+          fi
+      - name: Setup uv
+        uses: ./
+        with:
+          working-directory: __tests__/fixtures/cache-dir-defined-project
+      - run: uv sync
+        working-directory: __tests__/fixtures/cache-dir-defined-project
+      - name: Verify uv cache dir is populated
+        run: |
+          if [ ! -f "/tmp/pyproject-toml-defined-cache-path/CACHEDIR.TAG" ]; then
+            echo "Cache dir should exist"
+            exit 1
+          fi
+
   all-tests-passed:
     runs-on: ubuntu-latest
     needs:
@@ -811,6 +856,7 @@ jobs:
       - test-activate-environment
       - test-musl
       - test-cache-local
+      - test-cache-local-cache-disabled
       - test-setup-cache
       - test-restore-cache
       - test-setup-cache-requirements-txt
@@ -831,6 +877,7 @@ jobs:
       - test-absolute-path
       - test-relative-path
       - test-cache-prune-force
+      - test-cache-dir-from-file
     if: always()
     steps:
       - name: All tests passed

README.md

@@ -316,11 +316,18 @@ By default, the cache will be saved.
 
 ### Local cache path
 
-This action controls where uv stores its cache on the runner's filesystem by setting `UV_CACHE_DIR`.
+If caching is enabled, this action controls where uv stores its cache on the runner's filesystem
+by setting `UV_CACHE_DIR`.
+
 It defaults to `setup-uv-cache` in the `TMP` dir, `D:\a\_temp\uv-tool-dir` on Windows and
 `/tmp/setup-uv-cache` on Linux/macOS. You can change the default by specifying the path with the
 `cache-local-path` input.
 
+> [!NOTE]
+> If the environment variable `UV_CACHE_DIR` is already set this action will not override it.
+> 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`.
+
 ```yaml
 - name: Define a custom uv cache path
   uses: astral-sh/setup-uv@v6

__tests__/fixtures/cache-dir-defined-project/pyproject.toml

@@ -0,0 +1,16 @@
+[project]
+name = "uv-project"
+version = "0.1.0"
+description = "Add your description here"
+readme = "README.md"
+requires-python = ">=3.12"
+dependencies = [
+    "ruff>=0.6.2",
+]
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.uv]
+cache-dir = "/tmp/pyproject-toml-defined-cache-path"

__tests__/fixtures/cache-dir-defined-project/src/uv_project/__init__.py

@@ -0,0 +1,2 @@
+def hello() -> str:
+    return "Hello from uv-project!"

__tests__/fixtures/cache-dir-defined-project/uv.lock

@@ -0,0 +1,38 @@
+version = 1
+requires-python = ">=3.12"
+
+[[package]]
+name = "ruff"
+version = "0.6.2"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/23/f4/279d044f66b79261fd37df76bf72b64471afab5d3b7906a01499c4451910/ruff-0.6.2.tar.gz", hash = "sha256:239ee6beb9e91feb8e0ec384204a763f36cb53fb895a1a364618c6abb076b3be", size = 2460281 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/72/4b/47dd7a69287afb4069fa42c198e899463605460a58120196711bfcf0446b/ruff-0.6.2-py3-none-linux_armv6l.whl", hash = "sha256:5c8cbc6252deb3ea840ad6a20b0f8583caab0c5ef4f9cca21adc5a92b8f79f3c", size = 9695871 },
+    { url = "https://files.pythonhosted.org/packages/ae/c3/8aac62ac4638c14a740ee76a755a925f2d0d04580ab790a9887accb729f6/ruff-0.6.2-py3-none-macosx_10_12_x86_64.whl", hash = "sha256:17002fe241e76544448a8e1e6118abecbe8cd10cf68fde635dad480dba594570", size = 9459354 },
+    { url = "https://files.pythonhosted.org/packages/2f/cf/77fbd8d4617b9b9c503f9bffb8552c4e3ea1a58dc36975e7a9104ffb0f85/ruff-0.6.2-py3-none-macosx_11_0_arm64.whl", hash = "sha256:3dbeac76ed13456f8158b8f4fe087bf87882e645c8e8b606dd17b0b66c2c1158", size = 9163871 },
+    { url = "https://files.pythonhosted.org/packages/05/1c/765192bab32b79efbb498b06f0b9dcb3629112b53b8777ae1d19b8209e09/ruff-0.6.2-py3-none-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:094600ee88cda325988d3f54e3588c46de5c18dae09d683ace278b11f9d4d534", size = 10096250 },
+    { url = "https://files.pythonhosted.org/packages/08/d0/86f3cb0f6934c99f759c232984a5204d67a26745cad2d9edff6248adf7d2/ruff-0.6.2-py3-none-manylinux_2_17_armv7l.manylinux2014_armv7l.whl", hash = "sha256:316d418fe258c036ba05fbf7dfc1f7d3d4096db63431546163b472285668132b", size = 9475376 },
+    { url = "https://files.pythonhosted.org/packages/cd/cc/4c8d0e225b559a3fae6092ec310d7150d3b02b4669e9223f783ef64d82c0/ruff-0.6.2-py3-none-manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:d72b8b3abf8a2d51b7b9944a41307d2f442558ccb3859bbd87e6ae9be1694a5d", size = 10295634 },
+    { url = "https://files.pythonhosted.org/packages/db/96/d2699cfb1bb5a01c68122af43454c76c31331e1c8a9bd97d653d7c82524b/ruff-0.6.2-py3-none-manylinux_2_17_ppc64.manylinux2014_ppc64.whl", hash = "sha256:2aed7e243be68487aa8982e91c6e260982d00da3f38955873aecd5a9204b1d66", size = 11024941 },
+    { url = "https://files.pythonhosted.org/packages/8b/a9/6ecd66af8929e0f2a1ed308a4137f3521789f28f0eb97d32c2ca3aa7000c/ruff-0.6.2-py3-none-manylinux_2_17_ppc64le.manylinux2014_ppc64le.whl", hash = "sha256:d371f7fc9cec83497fe7cf5eaf5b76e22a8efce463de5f775a1826197feb9df8", size = 10606894 },
+    { url = "https://files.pythonhosted.org/packages/e4/73/2ee4cd19f44992fedac1cc6db9e3d825966072f6dcbd4032f21cbd063170/ruff-0.6.2-py3-none-manylinux_2_17_s390x.manylinux2014_s390x.whl", hash = "sha256:a8f310d63af08f583363dfb844ba8f9417b558199c58a5999215082036d795a1", size = 11552886 },
+    { url = "https://files.pythonhosted.org/packages/60/4c/c0f1cd35ce4a93c54a6bb1ee6934a3a205fa02198dd076678193853ceea1/ruff-0.6.2-py3-none-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:7db6880c53c56addb8638fe444818183385ec85eeada1d48fc5abe045301b2f1", size = 10264945 },
+    { url = "https://files.pythonhosted.org/packages/c4/89/e45c9359b9cdd4245512ea2b9f2bb128a997feaa5f726fc9e8c7a66afadf/ruff-0.6.2-py3-none-musllinux_1_2_aarch64.whl", hash = "sha256:1175d39faadd9a50718f478d23bfc1d4da5743f1ab56af81a2b6caf0a2394f23", size = 10100007 },
+    { url = "https://files.pythonhosted.org/packages/06/74/0bd4e0a7ed5f6908df87892f9bf60a2356c0fd74102d8097298bd9b4f346/ruff-0.6.2-py3-none-musllinux_1_2_armv7l.whl", hash = "sha256:5b939f9c86d51635fe486585389f54582f0d65b8238e08c327c1534844b3bb9a", size = 9559267 },
+    { url = "https://files.pythonhosted.org/packages/54/03/3dc6dc9419f276f05805bf888c279e3e0b631284abd548d9e87cebb93aec/ruff-0.6.2-py3-none-musllinux_1_2_i686.whl", hash = "sha256:d0d62ca91219f906caf9b187dea50d17353f15ec9bb15aae4a606cd697b49b4c", size = 9905304 },
+    { url = "https://files.pythonhosted.org/packages/5c/5b/d6a72a6a6bbf097c09de468326ef5fa1c9e7aa5e6e45979bc0d984b0dbe7/ruff-0.6.2-py3-none-musllinux_1_2_x86_64.whl", hash = "sha256:7438a7288f9d67ed3c8ce4d059e67f7ed65e9fe3aa2ab6f5b4b3610e57e3cb56", size = 10341480 },
+    { url = "https://files.pythonhosted.org/packages/79/a9/0f2f21fe15ba537c46598f96aa9ae4a3d4b9ec64926664617ca6a8c772f4/ruff-0.6.2-py3-none-win32.whl", hash = "sha256:279d5f7d86696df5f9549b56b9b6a7f6c72961b619022b5b7999b15db392a4da", size = 7961901 },
+    { url = "https://files.pythonhosted.org/packages/b0/80/fff12ffe11853d9f4ea3e5221e6dd2e93640a161c05c9579833e09ad40a7/ruff-0.6.2-py3-none-win_amd64.whl", hash = "sha256:d9f3469c7dd43cd22eb1c3fc16926fb8258d50cb1b216658a07be95dd117b0f2", size = 8783320 },
+    { url = "https://files.pythonhosted.org/packages/56/91/577cdd64cce5e74d3f8b5ecb93f29566def569c741eb008aed4f331ef821/ruff-0.6.2-py3-none-win_arm64.whl", hash = "sha256:f28fcd2cd0e02bdf739297516d5643a945cc7caf09bd9bcb4d932540a5ea4fa9", size = 8225886 },
+]
+
+[[package]]
+name = "uv-project"
+version = "0.1.0"
+source = { editable = "." }
+dependencies = [
+    { name = "ruff" },
+]
+
+[package.metadata]
+requires-dist = [{ name = "ruff" }]

dist/setup/index.js

@@ -129387,6 +129387,7 @@ const core = __importStar(__nccwpck_require__(37484));
 const exec = __importStar(__nccwpck_require__(95236));
 const restore_cache_1 = __nccwpck_require__(95391);
 const download_version_1 = __nccwpck_require__(28255);
+const config_file_1 = __nccwpck_require__(27846);
 const constants_1 = __nccwpck_require__(56156);
 const inputs_1 = __nccwpck_require__(9612);
 const platforms_1 = __nccwpck_require__(98361);
@@ -129409,7 +129410,7 @@ async function run() {
         setupPython();
         await activateEnvironment();
         addMatchers();
-        setCacheDir(inputs_1.cacheLocalPath);
+        setCacheDir();
         core.setOutput("uv-version", setupResult.version);
         core.saveState(constants_1.STATE_UV_VERSION, setupResult.version);
         core.info(`Successfully installed uv version ${setupResult.version}`);
@@ -129537,9 +129538,16 @@ async function activateEnvironment() {
         core.exportVariable("VIRTUAL_ENV", path.resolve(`${inputs_1.workingDirectory}${path.sep}.venv`));
     }
 }
-function setCacheDir(cacheLocalPath) {
-    core.exportVariable("UV_CACHE_DIR", cacheLocalPath);
-    core.info(`Set UV_CACHE_DIR to ${cacheLocalPath}`);
+function setCacheDir() {
+    if (inputs_1.enableCache) {
+        const cacheDirFromConfig = (0, config_file_1.getConfigValueFromTomlFile)("", "cache-dir");
+        if (cacheDirFromConfig !== undefined) {
+            core.info("Using cache-dir from uv config file, not modifying UV_CACHE_DIR");
+            return;
+        }
+        core.exportVariable("UV_CACHE_DIR", inputs_1.cacheLocalPath);
+        core.info(`Set UV_CACHE_DIR to ${inputs_1.cacheLocalPath}`);
+    }
 }
 function addMatchers() {
     if (inputs_1.addProblemMatchers) {
@@ -129550,6 +129558,67 @@ function addMatchers() {
 run();
 
 
+/***/ }),
+
+/***/ 27846:
+/***/ (function(__unused_webpack_module, exports, __nccwpck_require__) {
+
+"use strict";
+
+var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    var desc = Object.getOwnPropertyDescriptor(m, k);
+    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
+      desc = { enumerable: true, get: function() { return m[k]; } };
+    }
+    Object.defineProperty(o, k2, desc);
+}) : (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    o[k2] = m[k];
+}));
+var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
+    Object.defineProperty(o, "default", { enumerable: true, value: v });
+}) : function(o, v) {
+    o["default"] = v;
+});
+var __importStar = (this && this.__importStar) || (function () {
+    var ownKeys = function(o) {
+        ownKeys = Object.getOwnPropertyNames || function (o) {
+            var ar = [];
+            for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
+            return ar;
+        };
+        return ownKeys(o);
+    };
+    return function (mod) {
+        if (mod && mod.__esModule) return mod;
+        var result = {};
+        if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
+        __setModuleDefault(result, mod);
+        return result;
+    };
+})();
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", ({ value: true }));
+exports.getConfigValueFromTomlFile = getConfigValueFromTomlFile;
+const node_fs_1 = __importDefault(__nccwpck_require__(73024));
+const toml = __importStar(__nccwpck_require__(27106));
+function getConfigValueFromTomlFile(filePath, key) {
+    if (!node_fs_1.default.existsSync(filePath) || !filePath.endsWith(".toml")) {
+        return undefined;
+    }
+    const fileContent = node_fs_1.default.readFileSync(filePath, "utf-8");
+    if (filePath.endsWith("pyproject.toml")) {
+        const tomlContent = toml.parse(fileContent);
+        return tomlContent?.tool?.uv?.[key];
+    }
+    const tomlContent = toml.parse(fileContent);
+    return tomlContent[key];
+}
+
+
 /***/ }),
 
 /***/ 56156:
@@ -129642,6 +129711,7 @@ Object.defineProperty(exports, "__esModule", ({ value: true }));
 exports.addProblemMatchers = exports.manifestFile = exports.githubToken = exports.toolDir = exports.toolBinDir = exports.ignoreEmptyWorkdir = exports.ignoreNothingToCache = exports.pruneCache = exports.cacheDependencyGlob = exports.cacheLocalPath = exports.cacheSuffix = exports.saveCache = exports.restoreCache = exports.enableCache = exports.checkSum = exports.activateEnvironment = exports.pythonVersion = exports.versionFile = exports.version = exports.workingDirectory = void 0;
 const node_path_1 = __importDefault(__nccwpck_require__(76760));
 const core = __importStar(__nccwpck_require__(37484));
+const config_file_1 = __nccwpck_require__(27846);
 exports.workingDirectory = core.getInput("working-directory");
 exports.version = core.getInput("version");
 exports.versionFile = getVersionFile();
@@ -129711,6 +129781,14 @@ function getCacheLocalPath() {
         const tildeExpanded = expandTilde(cacheLocalPathInput);
         return resolveRelativePath(tildeExpanded);
     }
+    const cacheDirFromConfig = getCacheDirFromConfig();
+    if (cacheDirFromConfig !== undefined) {
+        return cacheDirFromConfig;
+    }
+    if (process.env.UV_CACHE_DIR !== undefined) {
+        core.info(`UV_CACHE_DIR is already set to ${process.env.UV_CACHE_DIR}`);
+        return process.env.UV_CACHE_DIR;
+    }
     if (process.env.RUNNER_ENVIRONMENT === "github-hosted") {
         if (process.env.RUNNER_TEMP !== undefined) {
             return `${process.env.RUNNER_TEMP}${node_path_1.default.sep}setup-uv-cache`;
@@ -129722,6 +129800,24 @@ function getCacheLocalPath() {
     }
     return `${process.env.HOME}${node_path_1.default.sep}.cache${node_path_1.default.sep}uv`;
 }
+function getCacheDirFromConfig() {
+    for (const filePath of [exports.versionFile, "uv.toml", "pyproject.toml"]) {
+        const resolvedPath = resolveRelativePath(filePath);
+        try {
+            const cacheDir = (0, config_file_1.getConfigValueFromTomlFile)(resolvedPath, "cache-dir");
+            if (cacheDir !== undefined) {
+                core.info(`Found cache-dir in ${resolvedPath}: ${cacheDir}`);
+                return cacheDir;
+            }
+        }
+        catch (err) {
+            const message = err.message;
+            core.warning(`Error while parsing ${filePath}: ${message}`);
+            return undefined;
+        }
+    }
+    return undefined;
+}
 function getCacheDependencyGlob() {
     const cacheDependencyGlobInput = core.getInput("cache-dependency-glob");
     if (cacheDependencyGlobInput !== "") {
@@ -129888,67 +129984,6 @@ async function isMuslOs() {
 }
 
 
-/***/ }),
-
-/***/ 9931:
-/***/ (function(__unused_webpack_module, exports, __nccwpck_require__) {
-
-"use strict";
-
-var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
-    if (k2 === undefined) k2 = k;
-    var desc = Object.getOwnPropertyDescriptor(m, k);
-    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
-      desc = { enumerable: true, get: function() { return m[k]; } };
-    }
-    Object.defineProperty(o, k2, desc);
-}) : (function(o, m, k, k2) {
-    if (k2 === undefined) k2 = k;
-    o[k2] = m[k];
-}));
-var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
-    Object.defineProperty(o, "default", { enumerable: true, value: v });
-}) : function(o, v) {
-    o["default"] = v;
-});
-var __importStar = (this && this.__importStar) || (function () {
-    var ownKeys = function(o) {
-        ownKeys = Object.getOwnPropertyNames || function (o) {
-            var ar = [];
-            for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
-            return ar;
-        };
-        return ownKeys(o);
-    };
-    return function (mod) {
-        if (mod && mod.__esModule) return mod;
-        var result = {};
-        if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
-        __setModuleDefault(result, mod);
-        return result;
-    };
-})();
-var __importDefault = (this && this.__importDefault) || function (mod) {
-    return (mod && mod.__esModule) ? mod : { "default": mod };
-};
-Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.getRequiredVersionFromConfigFile = getRequiredVersionFromConfigFile;
-const node_fs_1 = __importDefault(__nccwpck_require__(73024));
-const toml = __importStar(__nccwpck_require__(27106));
-function getRequiredVersionFromConfigFile(filePath) {
-    if (!filePath.endsWith(".toml")) {
-        return undefined;
-    }
-    const fileContent = node_fs_1.default.readFileSync(filePath, "utf-8");
-    if (filePath.endsWith("pyproject.toml")) {
-        const tomlContent = toml.parse(fileContent);
-        return tomlContent?.tool?.uv?.["required-version"];
-    }
-    const tomlContent = toml.parse(fileContent);
-    return tomlContent["required-version"];
-}
-
-
 /***/ }),
 
 /***/ 4569:
@@ -130068,7 +130103,7 @@ Object.defineProperty(exports, "__esModule", ({ value: true }));
 exports.getUvVersionFromFile = getUvVersionFromFile;
 const node_fs_1 = __importDefault(__nccwpck_require__(73024));
 const core = __importStar(__nccwpck_require__(37484));
-const config_file_1 = __nccwpck_require__(9931);
+const config_file_1 = __nccwpck_require__(27846);
 const requirements_file_1 = __nccwpck_require__(4569);
 const tool_versions_file_1 = __nccwpck_require__(4895);
 function getUvVersionFromFile(filePath) {
@@ -130081,7 +130116,7 @@ function getUvVersionFromFile(filePath) {
     try {
         uvVersion = (0, tool_versions_file_1.getUvVersionFromToolVersions)(filePath);
         if (uvVersion === undefined) {
-            uvVersion = (0, config_file_1.getRequiredVersionFromConfigFile)(filePath);
+            uvVersion = (0, config_file_1.getConfigValueFromTomlFile)(filePath, "required-version");
         }
         if (uvVersion === undefined) {
             uvVersion = (0, requirements_file_1.getUvVersionFromRequirementsFile)(filePath);

src/setup-uv.ts

@@ -8,6 +8,7 @@ import {
   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,
@@ -53,7 +54,7 @@ async function run(): Promise<void> {
     setupPython();
     await activateEnvironment();
     addMatchers();
-    setCacheDir(cacheLocalPath);
+    setCacheDir();
 
     core.setOutput("uv-version", setupResult.version);
     core.saveState(STATE_UV_VERSION, setupResult.version);
@@ -224,9 +225,18 @@ async function activateEnvironment(): Promise<void> {
   }
 }
 
-function setCacheDir(cacheLocalPath: string): void {
-  core.exportVariable("UV_CACHE_DIR", cacheLocalPath);
-  core.info(`Set UV_CACHE_DIR to ${cacheLocalPath}`);
+function setCacheDir(): void {
+  if (enableCache) {
+    const cacheDirFromConfig = getConfigValueFromTomlFile("", "cache-dir");
+    if (cacheDirFromConfig !== undefined) {
+      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}`);
+  }
 }
 
 function addMatchers(): void {

src/utils/config-file.ts

@@ -0,0 +1,24 @@
+import fs from "node:fs";
+import * as toml from "smol-toml";
+
+export function getConfigValueFromTomlFile(
+  filePath: string,
+  key: string,
+): string | undefined {
+  if (!fs.existsSync(filePath) || !filePath.endsWith(".toml")) {
+    return undefined;
+  }
+  const fileContent = fs.readFileSync(filePath, "utf-8");
+
+  if (filePath.endsWith("pyproject.toml")) {
+    const tomlContent = toml.parse(fileContent) as {
+      tool?: { uv?: Record<string, string | undefined> };
+    };
+    return tomlContent?.tool?.uv?.[key];
+  }
+  const tomlContent = toml.parse(fileContent) as Record<
+    string,
+    string | undefined
+  >;
+  return tomlContent[key];
+}

src/utils/inputs.ts

@@ -1,5 +1,6 @@
 import path from "node:path";
 import * as core from "@actions/core";
+import { getConfigValueFromTomlFile } from "./config-file";
 
 export const workingDirectory = core.getInput("working-directory");
 export const version = core.getInput("version");
@@ -82,6 +83,14 @@ function getCacheLocalPath(): string {
     const tildeExpanded = expandTilde(cacheLocalPathInput);
     return resolveRelativePath(tildeExpanded);
   }
+  const cacheDirFromConfig = getCacheDirFromConfig();
+  if (cacheDirFromConfig !== undefined) {
+    return cacheDirFromConfig;
+  }
+  if (process.env.UV_CACHE_DIR !== undefined) {
+    core.info(`UV_CACHE_DIR is already set to ${process.env.UV_CACHE_DIR}`);
+    return process.env.UV_CACHE_DIR;
+  }
   if (process.env.RUNNER_ENVIRONMENT === "github-hosted") {
     if (process.env.RUNNER_TEMP !== undefined) {
       return `${process.env.RUNNER_TEMP}${path.sep}setup-uv-cache`;
@@ -96,6 +105,24 @@ function getCacheLocalPath(): string {
   return `${process.env.HOME}${path.sep}.cache${path.sep}uv`;
 }
 
+function getCacheDirFromConfig(): string | undefined {
+  for (const filePath of [versionFile, "uv.toml", "pyproject.toml"]) {
+    const resolvedPath = resolveRelativePath(filePath);
+    try {
+      const cacheDir = getConfigValueFromTomlFile(resolvedPath, "cache-dir");
+      if (cacheDir !== undefined) {
+        core.info(`Found cache-dir in ${resolvedPath}: ${cacheDir}`);
+        return cacheDir;
+      }
+    } catch (err) {
+      const message = (err as Error).message;
+      core.warning(`Error while parsing ${filePath}: ${message}`);
+      return undefined;
+    }
+  }
+  return undefined;
+}
+
 function getCacheDependencyGlob(): string {
   const cacheDependencyGlobInput = core.getInput("cache-dependency-glob");
   if (cacheDependencyGlobInput !== "") {

src/version/config-file.ts

@@ -1,22 +0,0 @@
-import fs from "node:fs";
-import * as toml from "smol-toml";
-
-export function getRequiredVersionFromConfigFile(
-  filePath: string,
-): string | undefined {
-  if (!filePath.endsWith(".toml")) {
-    return undefined;
-  }
-  const fileContent = fs.readFileSync(filePath, "utf-8");
-
-  if (filePath.endsWith("pyproject.toml")) {
-    const tomlContent = toml.parse(fileContent) as {
-      tool?: { uv?: { "required-version"?: string } };
-    };
-    return tomlContent?.tool?.uv?.["required-version"];
-  }
-  const tomlContent = toml.parse(fileContent) as {
-    "required-version"?: string;
-  };
-  return tomlContent["required-version"];
-}

src/version/resolve.ts

@@ -1,6 +1,6 @@
 import fs from "node:fs";
 import * as core from "@actions/core";
-import { getRequiredVersionFromConfigFile } from "./config-file";
+import { getConfigValueFromTomlFile } from "../utils/config-file";
 import { getUvVersionFromRequirementsFile } from "./requirements-file";
 import { getUvVersionFromToolVersions } from "./tool-versions-file";
 
@@ -14,7 +14,7 @@ export function getUvVersionFromFile(filePath: string): string | undefined {
   try {
     uvVersion = getUvVersionFromToolVersions(filePath);
     if (uvVersion === undefined) {
-      uvVersion = getRequiredVersionFromConfigFile(filePath);
+      uvVersion = getConfigValueFromTomlFile(filePath, "required-version");
     }
     if (uvVersion === undefined) {
       uvVersion = getUvVersionFromRequirementsFile(filePath);