Added push testing to repro issue faster

* run to index

* action.yaml route

* move to dev dep

.github/CODEOWNERS

@@ -0,0 +1 @@
+* @Azure/aks-atlanta

.github/ISSUE_TEMPLATE/issue--bug-report---feature-request.md

@@ -0,0 +1,10 @@
+---
+name: 'Issue: Bug Report / Feature Request'
+about: Create a report to help us improve
+title: ''
+labels: need-to-triage
+assignees: ''
+
+---
+
+

.github/workflows/defaultLabels.yml

@@ -0,0 +1,35 @@
+name: setting-default-labels
+
+# Controls when the action will run.
+on:
+  schedule:
+    - cron: "0 0/3 * * *"
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  build:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      - uses: actions/stale@v3
+        name: Setting issue as idle
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          stale-issue-message: "This issue is idle because it has been open for 14 days with no activity."
+          stale-issue-label: "idle"
+          days-before-stale: 14
+          days-before-close: -1
+          operations-per-run: 100
+          exempt-issue-labels: "backlog"
+
+      - uses: actions/stale@v3
+        name: Setting PR as idle
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          stale-pr-message: "This PR is idle because it has been open for 14 days with no activity."
+          stale-pr-label: "idle"
+          days-before-stale: 14
+          days-before-close: -1
+          operations-per-run: 100

.github/workflows/integration-tests-push.yml

@@ -0,0 +1,62 @@
+name: "Trigger Integration tests"
+on:
+  push:
+jobs:
+  trigger-integration-tests:
+    name: Trigger Integration tests - macos-latest
+    runs-on: macos-latest
+    env:
+      HELM_3_8_0: "v3.8.0"
+      HELM_3_7_2: "v3.7.2"
+      HELM_NO_V: "3.5.0"
+      PR_BASE_REF: ${{ github.event.pull_request.base.ref }}
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v2
+      - name: npm install and build
+        id: action-npm-build
+        run: |
+          echo $PR_BASE_REF
+          if [[ $PR_BASE_REF != releases/* ]]; then
+            npm install
+            npm run build
+          fi
+      - name: Setup helm
+        uses: ./
+        with:
+          version: ${{ env.HELM_3_8_0 }}
+      - name: Validate helm 3.8.0
+        run: |
+          if [[ $(helm version) != *$HELM_3_8_0* ]]; then
+            echo "HELM VERSION INCORRECT: HELM VERSION DOES NOT CONTAIN v3.8.0"
+            echo "HELM VERSION OUTPUT: $(helm version)"
+            exit 1
+          else
+            echo "HELM VERSION $HELM_3_8_0 INSTALLED SUCCESSFULLY"
+          fi
+      - name: Setup helm 3.7.2
+        uses: ./
+        with:
+          version: ${{ env.HELM_3_7_2 }}
+      - name: Validate 3.7.2
+        run: |
+          if [[ $(helm version) != *$HELM_3_7_2* ]]; then
+            echo "HELM VERSION INCORRECT: HELM VERSION DOES NOT CONTAIN v3.7.2"
+            echo "HELM VERSION OUTPUT: $(helm version)"
+            exit 1
+          else
+            echo "HELM VERSION $HELM_3_7_2 INSTALLED SUCCESSFULLY"
+          fi
+      - name: Setup helm 3.5.0 with no v in version
+        uses: ./
+        with:
+          version: ${{ env.HELM_NO_V }}
+      - name: Validate 3.5.0 without v in version
+        run: |
+          if [[ $(helm version) != *$HELM_NO_V* ]]; then
+            echo "HELM VERSION INCORRECT: HELM VERSION DOES NOT CONTAIN v3.5.0"
+            echo "HELM VERSION OUTPUT: $(helm version)"
+            exit 1
+          else
+            echo "HELM VERSION $HELM_3_5_0 INSTALLED SUCCESSFULLY"
+          fi

.github/workflows/integration-tests.yml

@@ -0,0 +1,65 @@
+name: "Trigger Integration tests"
+on:
+  pull_request:
+    branches:
+      - main
+      - "releases/*"
+jobs:
+  trigger-integration-tests:
+    name: Trigger Integration tests
+    runs-on: ubuntu-latest
+    env:
+      HELM_3_8_0: "v3.8.0"
+      HELM_3_7_2: "v3.7.2"
+      HELM_NO_V: "3.5.0"
+      PR_BASE_REF: ${{ github.event.pull_request.base.ref }}
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v2
+      - name: npm install and build
+        id: action-npm-build
+        run: |
+          echo $PR_BASE_REF
+          if [[ $PR_BASE_REF != releases/* ]]; then
+            npm install
+            npm run build
+          fi
+      - name: Setup helm
+        uses: ./
+        with:
+          version: ${{ env.HELM_3_8_0 }}
+      - name: Validate helm 3.8.0
+        run: |
+          if [[ $(helm version) != *$HELM_3_8_0* ]]; then
+            echo "HELM VERSION INCORRECT: HELM VERSION DOES NOT CONTAIN v3.8.0"
+            echo "HELM VERSION OUTPUT: $(helm version)"
+            exit 1
+          else
+            echo "HELM VERSION $HELM_3_8_0 INSTALLED SUCCESSFULLY"
+          fi
+      - name: Setup helm 3.7.2
+        uses: ./
+        with:
+          version: ${{ env.HELM_3_7_2 }}
+      - name: Validate 3.7.2
+        run: |
+          if [[ $(helm version) != *$HELM_3_7_2* ]]; then
+            echo "HELM VERSION INCORRECT: HELM VERSION DOES NOT CONTAIN v3.7.2"
+            echo "HELM VERSION OUTPUT: $(helm version)"
+            exit 1
+          else
+            echo "HELM VERSION $HELM_3_7_2 INSTALLED SUCCESSFULLY"
+          fi
+      - name: Setup helm 3.5.0 with no v in version
+        uses: ./
+        with:
+          version: ${{ env.HELM_NO_V }}
+      - name: Validate 3.5.0 without v in version
+        run: |
+          if [[ $(helm version) != *$HELM_NO_V* ]]; then
+            echo "HELM VERSION INCORRECT: HELM VERSION DOES NOT CONTAIN v3.5.0"
+            echo "HELM VERSION OUTPUT: $(helm version)"
+            exit 1
+          else
+            echo "HELM VERSION $HELM_3_5_0 INSTALLED SUCCESSFULLY"
+          fi

.github/workflows/release-pr.yml

@@ -0,0 +1,14 @@
+name: Create release PR
+
+on:
+  workflow_dispatch:
+    inputs:
+      release:
+        description: "Define release version (ex: v1, v2, v3)"
+        required: true
+
+jobs:
+  release-pr:
+    uses: OliverMKing/javascript-release-workflow/.github/workflows/release-pr.yml@main
+    with:
+      release: ${{ github.event.inputs.release }}

.github/workflows/tag-and-draft.yml

@@ -0,0 +1,10 @@
+name: Tag and create release draft
+
+on:
+  push:
+    branches:
+      - releases/*
+
+jobs:
+  tag-and-release:
+    uses: OliverMKing/javascript-release-workflow/.github/workflows/tag-and-release.yml@main

.github/workflows/unit-tests.yml

@@ -0,0 +1,21 @@
+name: "Run unit tests."
+on: # rebuild any PRs and main branch changes
+  pull_request:
+    branches:
+      - main
+      - "releases/*"
+  push:
+    branches:
+      - main
+      - "releases/*"
+
+jobs:
+  build: # make sure build/ci works properly
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+
+      - name: Run L0 tests.
+        run: |
+          npm install
+          npm test

.gitignore

@@ -59,3 +59,9 @@ typings/
 
 # next.js build output
 .next
+
+node_modules
+coverage
+
+# Transpiled JS
+lib/

README.md

@@ -1,7 +1,8 @@
 # Setup Helm
-#### Install a specific version of helm binary on the runner.
+Install a specific version of helm binary on the runner.
+## Example
 
-Acceptable values are latest or any semantic version string like `1.15.0`. Use this action in workflow to define which version of helm will be used.
+Acceptable values are latest or any semantic version string like v3.5.0 Use this action in workflow to define which version of helm will be used. v2 of this action only supports Helm3.
 
 ```yaml
 - uses: azure/setup-helm@v1

action.yml

@@ -1,15 +1,15 @@
-name: 'Helm tool installer'
-description: 'Install a specific version of helm binary. Acceptable values are latest or any semantic version string like 1.15.0'
-inputs: 
+name: "Helm tool installer"
+description: "Install a specific version of helm binary. Acceptable values are latest or any semantic version string like 1.15.0"
+inputs:
   version:
-    description: 'Version of helm'
+    description: "Version of helm"
     required: true
-    default: 'latest'
+    default: "latest"
 outputs:
   helm-path:
-    description: 'Path to the cached helm binary'
+    description: "Path to the cached helm binary"
 branding:
-  color: 'blue'
+  color: "blue"
 runs:
-  using: 'node12'
-  main: 'lib/run.js'
+  using: "node12"
+  main: "lib/index.js"

jest.config.js

@@ -0,0 +1,18 @@
+module.exports = {
+  clearMocks: true,
+  moduleFileExtensions: ['js', 'ts'],
+  testEnvironment: 'node',
+  testMatch: ['**/*.test.ts'],
+  transform: {
+    '^.+\\.ts$': 'ts-jest'
+  },
+  verbose: true,
+  coverageThreshold: {
+    "global": {
+      "branches": 0,
+      "functions": 14,
+      "lines": 27,
+      "statements": 27
+    }
+  }
+}

lib/run.js

@@ -1,146 +0,0 @@
-"use strict";
-// Copyright (c) Microsoft Corporation.
-// Licensed under the MIT license.
-var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
-    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
-    return new (P || (P = Promise))(function (resolve, reject) {
-        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
-        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
-        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments || [])).next());
-    });
-};
-var __importStar = (this && this.__importStar) || function (mod) {
-    if (mod && mod.__esModule) return mod;
-    var result = {};
-    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
-    result["default"] = mod;
-    return result;
-};
-Object.defineProperty(exports, "__esModule", { value: true });
-const os = __importStar(require("os"));
-const path = __importStar(require("path"));
-const util = __importStar(require("util"));
-const fs = __importStar(require("fs"));
-const semver = __importStar(require("semver"));
-const toolCache = __importStar(require("@actions/tool-cache"));
-const core = __importStar(require("@actions/core"));
-const helmToolName = 'helm';
-const stableHelmVersion = 'v3.2.1';
-const helmAllReleasesUrl = 'https://api.github.com/repos/helm/helm/releases';
-function getExecutableExtension() {
-    if (os.type().match(/^Win/)) {
-        return '.exe';
-    }
-    return '';
-}
-function getHelmDownloadURL(version) {
-    switch (os.type()) {
-        case 'Linux':
-            return util.format('https://get.helm.sh/helm-%s-linux-amd64.zip', version);
-        case 'Darwin':
-            return util.format('https://get.helm.sh/helm-%s-darwin-amd64.zip', version);
-        case 'Windows_NT':
-        default:
-            return util.format('https://get.helm.sh/helm-%s-windows-amd64.zip', version);
-    }
-}
-function getStableHelmVersion() {
-    return __awaiter(this, void 0, void 0, function* () {
-        try {
-            const downloadPath = yield toolCache.downloadTool(helmAllReleasesUrl);
-            const responseArray = JSON.parse(fs.readFileSync(downloadPath, 'utf8').toString().trim());
-            let latestHelmVersion = semver.clean(stableHelmVersion);
-            responseArray.forEach(response => {
-                if (response && response.tag_name) {
-                    let currentHelmVerison = semver.clean(response.tag_name.toString());
-                    if (currentHelmVerison) {
-                        if (currentHelmVerison.toString().indexOf('rc') == -1 && semver.gt(currentHelmVerison, latestHelmVersion)) {
-                            //If current helm version is not a pre release and is greater than latest helm version
-                            latestHelmVersion = currentHelmVerison;
-                        }
-                    }
-                }
-            });
-            latestHelmVersion = "v" + latestHelmVersion;
-            return latestHelmVersion;
-        }
-        catch (error) {
-            core.warning(util.format("Cannot get the latest Helm info from %s. Error %s. Using default Helm version %s.", helmAllReleasesUrl, error, stableHelmVersion));
-        }
-        return stableHelmVersion;
-    });
-}
-var walkSync = function (dir, filelist, fileToFind) {
-    var files = fs.readdirSync(dir);
-    filelist = filelist || [];
-    files.forEach(function (file) {
-        if (fs.statSync(path.join(dir, file)).isDirectory()) {
-            filelist = walkSync(path.join(dir, file), filelist, fileToFind);
-        }
-        else {
-            core.debug(file);
-            if (file == fileToFind) {
-                filelist.push(path.join(dir, file));
-            }
-        }
-    });
-    return filelist;
-};
-function downloadHelm(version) {
-    return __awaiter(this, void 0, void 0, function* () {
-        if (!version) {
-            version = yield getStableHelmVersion();
-        }
-        let cachedToolpath = toolCache.find(helmToolName, version);
-        if (!cachedToolpath) {
-            let helmDownloadPath;
-            try {
-                helmDownloadPath = yield toolCache.downloadTool(getHelmDownloadURL(version));
-            }
-            catch (exception) {
-                throw new Error(util.format("Failed to download Helm from location ", getHelmDownloadURL(version)));
-            }
-            fs.chmodSync(helmDownloadPath, '777');
-            const unzipedHelmPath = yield toolCache.extractZip(helmDownloadPath);
-            cachedToolpath = yield toolCache.cacheDir(unzipedHelmPath, helmToolName, version);
-        }
-        const helmpath = findHelm(cachedToolpath);
-        if (!helmpath) {
-            throw new Error(util.format("Helm executable not found in path ", cachedToolpath));
-        }
-        fs.chmodSync(helmpath, '777');
-        return helmpath;
-    });
-}
-function findHelm(rootFolder) {
-    fs.chmodSync(rootFolder, '777');
-    var filelist = [];
-    walkSync(rootFolder, filelist, helmToolName + getExecutableExtension());
-    if (!filelist) {
-        throw new Error(util.format("Helm executable not found in path ", rootFolder));
-    }
-    else {
-        return filelist[0];
-    }
-}
-function run() {
-    return __awaiter(this, void 0, void 0, function* () {
-        let version = core.getInput('version', { 'required': true });
-        if (version.toLocaleLowerCase() === 'latest') {
-            version = yield getStableHelmVersion();
-        }
-        let cachedPath = yield downloadHelm(version);
-        try {
-            if (!process.env['PATH'].startsWith(path.dirname(cachedPath))) {
-                core.addPath(path.dirname(cachedPath));
-            }
-        }
-        catch (_a) {
-            //do nothing, set as output variable
-        }
-        console.log(`Helm tool version: '${version}' has been cached at ${cachedPath}`);
-        core.setOutput('helm-path', cachedPath);
-    });
-}
-run().catch(core.setFailed);

package.json

@@ -6,19 +6,25 @@
     "author": "Anumita Shenoy",
     "license": "MIT",
     "dependencies": {
-        "@actions/tool-cache": "1.1.2",
-        "@actions/io": "^1.0.0",
-        "@actions/core": "^1.0.0",
+        "@actions/core": "^1.2.6",
         "@actions/exec": "^1.0.0",
+        "@actions/io": "^1.0.0",
+        "@actions/tool-cache": "1.1.2",
+        "@octokit/graphql": "^4.6.1",
         "semver": "^6.1.0"
     },
-    "main": "lib/run.js",
+    "main": "lib/index.js",
     "scripts": {
-        "build": "tsc",
-        "test": "echo \"Error: no test specified\" && exit 1"
+        "build": "ncc build src/run.ts -o lib",
+        "test": "jest",
+        "test-coverage": "jest --coverage"
     },
     "devDependencies": {
+        "@types/jest": "^25.2.2",
         "@types/node": "^12.0.10",
+        "@vercel/ncc": "^0.33.1",
+        "jest": "^26.0.1",
+        "ts-jest": "^25.5.1",
         "typescript": "^3.5.2"
     }
-}
+}

src/run.test.ts

@@ -0,0 +1,268 @@
+import * as run from "./run";
+import * as os from "os";
+import * as toolCache from "@actions/tool-cache";
+import * as fs from "fs";
+import * as path from "path";
+import * as core from "@actions/core";
+
+describe("run.ts", () => {
+  test("getExecutableExtension() - return .exe when os is Windows", () => {
+    jest.spyOn(os, "type").mockReturnValue("Windows_NT");
+
+    expect(run.getExecutableExtension()).toBe(".exe");
+    expect(os.type).toBeCalled();
+  });
+
+  test("getExecutableExtension() - return empty string for non-windows OS", () => {
+    jest.spyOn(os, "type").mockReturnValue("Darwin");
+
+    expect(run.getExecutableExtension()).toBe("");
+    expect(os.type).toBeCalled();
+  });
+
+  test("getHelmDownloadURL() - return the URL to download helm for Linux", () => {
+    jest.spyOn(os, "type").mockReturnValue("Linux");
+    jest.spyOn(os, "arch").mockReturnValueOnce("unknown");
+    const kubectlLinuxUrl = "https://get.helm.sh/helm-v3.8.0-linux-amd64.zip";
+
+    expect(run.getHelmDownloadURL("v3.8.0")).toBe(kubectlLinuxUrl);
+    expect(os.type).toBeCalled();
+    expect(os.arch).toBeCalled();
+
+    // arm64
+    jest.spyOn(os, "type").mockReturnValue("Linux");
+    jest.spyOn(os, "arch").mockReturnValueOnce("arm64");
+    const kubectlLinuxArm64Url =
+      "https://get.helm.sh/helm-v3.8.0-linux-arm64.zip";
+
+    expect(run.getHelmDownloadURL("v3.8.0")).toBe(kubectlLinuxArm64Url);
+    expect(os.type).toBeCalled();
+    expect(os.arch).toBeCalled();
+  });
+
+  test("getHelmDownloadURL() - return the URL to download helm for Darwin", () => {
+    jest.spyOn(os, "type").mockReturnValue("Darwin");
+    jest.spyOn(os, "arch").mockReturnValueOnce("unknown");
+    const kubectlDarwinUrl = "https://get.helm.sh/helm-v3.8.0-darwin-amd64.zip";
+
+    expect(run.getHelmDownloadURL("v3.8.0")).toBe(kubectlDarwinUrl);
+    expect(os.type).toBeCalled();
+    expect(os.arch).toBeCalled();
+
+    // arm64
+    jest.spyOn(os, "type").mockReturnValue("Darwin");
+    jest.spyOn(os, "arch").mockReturnValueOnce("arm64");
+    const kubectlDarwinArm64Url =
+      "https://get.helm.sh/helm-v3.8.0-darwin-arm64.zip";
+
+    expect(run.getHelmDownloadURL("v3.8.0")).toBe(kubectlDarwinArm64Url);
+    expect(os.type).toBeCalled();
+    expect(os.arch).toBeCalled();
+  });
+
+  test("getValidVersion() - return version with v prepended", () => {
+      expect(run.getValidVersion("3.8.0")).toBe("v3.8.0");
+  });
+  
+  test("getHelmDownloadURL() - return the URL to download helm for Windows", () => {
+    jest.spyOn(os, "type").mockReturnValue("Windows_NT");
+
+    const kubectlWindowsUrl =
+      "https://get.helm.sh/helm-v3.8.0-windows-amd64.zip";
+    expect(run.getHelmDownloadURL("v3.8.0")).toBe(kubectlWindowsUrl);
+    expect(os.type).toBeCalled();
+  });
+
+  test("getLatestHelmVersion() - return the latest version of HELM", async () => {
+    try {
+      expect(await run.getLatestHelmVersion()).toBe("v3.8.0");
+    } catch (e) {
+      return e;
+    }
+  });
+
+  test("walkSync() - return path to the all files matching fileToFind in dir", () => {
+    jest.spyOn(fs, "readdirSync").mockImplementation((file, _) => {
+      if (file == "mainFolder")
+        return [
+          "file1" as unknown as fs.Dirent,
+          "file2" as unknown as fs.Dirent,
+          "folder1" as unknown as fs.Dirent,
+          "folder2" as unknown as fs.Dirent,
+        ];
+      if (file == path.join("mainFolder", "folder1"))
+        return [
+          "file11" as unknown as fs.Dirent,
+          "file12" as unknown as fs.Dirent,
+        ];
+      if (file == path.join("mainFolder", "folder2"))
+        return [
+          "file21" as unknown as fs.Dirent,
+          "file22" as unknown as fs.Dirent,
+        ];
+    });
+    jest.spyOn(core, "debug").mockImplementation();
+    jest.spyOn(fs, "statSync").mockImplementation((file) => {
+      const isDirectory =
+        (file as string).toLowerCase().indexOf("file") == -1 ? true : false;
+      return { isDirectory: () => isDirectory } as fs.Stats;
+    });
+
+    expect(run.walkSync("mainFolder", null, "file21")).toEqual([
+      path.join("mainFolder", "folder2", "file21"),
+    ]);
+    expect(fs.readdirSync).toBeCalledTimes(3);
+    expect(fs.statSync).toBeCalledTimes(8);
+  });
+
+  test("walkSync() - return empty array if no file with name fileToFind exists", () => {
+    jest.spyOn(fs, "readdirSync").mockImplementation((file, _) => {
+      if (file == "mainFolder")
+        return [
+          "file1" as unknown as fs.Dirent,
+          "file2" as unknown as fs.Dirent,
+          "folder1" as unknown as fs.Dirent,
+          "folder2" as unknown as fs.Dirent,
+        ];
+      if (file == path.join("mainFolder", "folder1"))
+        return [
+          "file11" as unknown as fs.Dirent,
+          "file12" as unknown as fs.Dirent,
+        ];
+      if (file == path.join("mainFolder", "folder2"))
+        return [
+          "file21" as unknown as fs.Dirent,
+          "file22" as unknown as fs.Dirent,
+        ];
+    });
+    jest.spyOn(core, "debug").mockImplementation();
+    jest.spyOn(fs, "statSync").mockImplementation((file) => {
+      const isDirectory =
+        (file as string).toLowerCase().indexOf("file") == -1 ? true : false;
+      return { isDirectory: () => isDirectory } as fs.Stats;
+    });
+
+    expect(run.walkSync("mainFolder", null, "helm.exe")).toEqual([]);
+    expect(fs.readdirSync).toBeCalledTimes(3);
+    expect(fs.statSync).toBeCalledTimes(8);
+  });
+
+  test("findHelm() - change access permissions and find the helm in given directory", () => {
+    jest.spyOn(fs, "chmodSync").mockImplementation(() => {});
+    jest.spyOn(fs, "readdirSync").mockImplementation((file, _) => {
+      if (file == "mainFolder") return ["helm.exe" as unknown as fs.Dirent];
+    });
+    jest.spyOn(fs, "statSync").mockImplementation((file) => {
+      const isDirectory =
+        (file as string).indexOf("folder") == -1 ? false : true;
+      return { isDirectory: () => isDirectory } as fs.Stats;
+    });
+    jest.spyOn(os, "type").mockReturnValue("Windows_NT");
+
+    expect(run.findHelm("mainFolder")).toBe(
+      path.join("mainFolder", "helm.exe")
+    );
+  });
+
+  test("findHelm() - throw error if executable not found", () => {
+    jest.spyOn(fs, "chmodSync").mockImplementation(() => {});
+    jest.spyOn(fs, "readdirSync").mockImplementation((file, _) => {
+      if (file == "mainFolder") return [];
+    });
+    jest.spyOn(fs, "statSync").mockImplementation((file) => {
+      return { isDirectory: () => true } as fs.Stats;
+    });
+    jest.spyOn(os, "type").mockReturnValue("Windows_NT");
+    expect(() => run.findHelm("mainFolder")).toThrow(
+      "Helm executable not found in path mainFolder"
+    );
+  });
+
+  test("downloadHelm() - download helm and return path to it", async () => {
+    jest.spyOn(toolCache, "find").mockReturnValue("");
+    jest.spyOn(toolCache, "downloadTool").mockResolvedValue("pathToTool");
+    const response = JSON.stringify([{ tag_name: "v4.0.0" }]);
+    jest.spyOn(fs, "readFileSync").mockReturnValue(response);
+    jest.spyOn(os, "type").mockReturnValue("Windows_NT");
+    jest.spyOn(fs, "chmodSync").mockImplementation(() => {});
+    jest.spyOn(toolCache, "extractZip").mockResolvedValue("pathToUnzippedHelm");
+    jest.spyOn(toolCache, "cacheDir").mockResolvedValue("pathToCachedDir");
+    jest
+      .spyOn(fs, "readdirSync")
+      .mockImplementation((file, _) => ["helm.exe" as unknown as fs.Dirent]);
+    jest.spyOn(fs, "statSync").mockImplementation((file) => {
+      const isDirectory =
+        (file as string).indexOf("folder") == -1 ? false : true;
+      return { isDirectory: () => isDirectory } as fs.Stats;
+    });
+
+    expect(await run.downloadHelm("v4.0.0")).toBe(
+      path.join("pathToCachedDir", "helm.exe")
+    );
+    expect(toolCache.find).toBeCalledWith("helm", "v4.0.0");
+    expect(toolCache.downloadTool).toBeCalledWith(
+      "https://get.helm.sh/helm-v4.0.0-windows-amd64.zip"
+    );
+    expect(fs.chmodSync).toBeCalledWith("pathToTool", "777");
+    expect(toolCache.extractZip).toBeCalledWith("pathToTool");
+    expect(fs.chmodSync).toBeCalledWith(
+      path.join("pathToCachedDir", "helm.exe"),
+      "777"
+    );
+  });
+
+  test("downloadHelm() - throw error if unable to download", async () => {
+    jest.spyOn(toolCache, "find").mockReturnValue("");
+    jest.spyOn(toolCache, "downloadTool").mockImplementation(async () => {
+      throw "Unable to download";
+    });
+    jest.spyOn(os, "type").mockReturnValue("Windows_NT");
+
+    await expect(run.downloadHelm("v3.2.1")).rejects.toThrow(
+      "Failed to download Helm from location https://get.helm.sh/helm-v3.2.1-windows-amd64.zip"
+    );
+    expect(toolCache.find).toBeCalledWith("helm", "v3.2.1");
+    expect(toolCache.downloadTool).toBeCalledWith(
+      "https://get.helm.sh/helm-v3.2.1-windows-amd64.zip"
+    );
+  });
+
+  test("downloadHelm() - return path to helm tool with same version from toolCache", async () => {
+    jest.spyOn(toolCache, "find").mockReturnValue("pathToCachedDir");
+    jest.spyOn(fs, "chmodSync").mockImplementation(() => {});
+
+    expect(await run.downloadHelm("v3.2.1")).toBe(
+      path.join("pathToCachedDir", "helm.exe")
+    );
+    expect(toolCache.find).toBeCalledWith("helm", "v3.2.1");
+    expect(fs.chmodSync).toBeCalledWith(
+      path.join("pathToCachedDir", "helm.exe"),
+      "777"
+    );
+  });
+
+  test("downloadHelm() - throw error is helm is not found in path", async () => {
+    jest.spyOn(toolCache, "find").mockReturnValue("");
+    jest.spyOn(toolCache, "downloadTool").mockResolvedValue("pathToTool");
+    jest.spyOn(os, "type").mockReturnValue("Windows_NT");
+    jest.spyOn(fs, "chmodSync").mockImplementation();
+    jest.spyOn(toolCache, "extractZip").mockResolvedValue("pathToUnzippedHelm");
+    jest.spyOn(toolCache, "cacheDir").mockResolvedValue("pathToCachedDir");
+    jest.spyOn(fs, "readdirSync").mockImplementation((file, _) => []);
+    jest.spyOn(fs, "statSync").mockImplementation((file) => {
+      const isDirectory =
+        (file as string).indexOf("folder") == -1 ? false : true;
+      return { isDirectory: () => isDirectory } as fs.Stats;
+    });
+
+    await expect(run.downloadHelm("v3.2.1")).rejects.toThrow(
+      "Helm executable not found in path pathToCachedDir"
+    );
+    expect(toolCache.find).toBeCalledWith("helm", "v3.2.1");
+    expect(toolCache.downloadTool).toBeCalledWith(
+      "https://get.helm.sh/helm-v3.2.1-windows-amd64.zip"
+    );
+    expect(fs.chmodSync).toBeCalledWith("pathToTool", "777");
+    expect(toolCache.extractZip).toBeCalledWith("pathToTool");
+  });
+});

src/run.ts

@@ -1,141 +1,194 @@
 // Copyright (c) Microsoft Corporation.
+// Copyright (c) Microsoft Corporation.
 // Licensed under the MIT license.
 
-import * as os from 'os';
-import * as path from 'path';
-import * as util from 'util';
-import * as fs from 'fs';
-import * as semver from 'semver';
+import * as os from "os";
+import * as path from "path";
+import * as util from "util";
+import * as fs from "fs";
 
-import * as toolCache from '@actions/tool-cache';
-import * as core from '@actions/core';
+import * as toolCache from "@actions/tool-cache";
+import * as core from "@actions/core";
 
-const helmToolName = 'helm';
-const stableHelmVersion = 'v3.2.1';
-const helmAllReleasesUrl = 'https://api.github.com/repos/helm/helm/releases';
+const helmToolName = "helm";
+const stableHelmVersion = "v3.8.0";
+const helmAllReleasesUrl = "https://api.github.com/repos/helm/helm/releases";
 
-function getExecutableExtension(): string {
-    if (os.type().match(/^Win/)) {
-        return '.exe';
+export async function run() {
+  let version = core.getInput("version", { required: true });
+
+  if(version !== "latest" && version[0] !== "v"){
+      version = getValidVersion(version);
+  }
+  if (version.toLocaleLowerCase() === "latest") {
+    version = await getLatestHelmVersion();
+  }
+
+  core.debug(util.format("Downloading %s", version));
+  let cachedPath = await downloadHelm(version);
+
+  try {
+    if (!process.env["PATH"].startsWith(path.dirname(cachedPath))) {
+      core.addPath(path.dirname(cachedPath));
     }
-    return '';
+  } catch {
+    //do nothing, set as output variable
+  }
+
+  console.log(
+    `Helm tool version: '${version}' has been cached at ${cachedPath}`
+  );
+  core.setOutput("helm-path", cachedPath);
 }
 
-function getHelmDownloadURL(version: string): string {
-    switch (os.type()) {
-        case 'Linux':
-            return util.format('https://get.helm.sh/helm-%s-linux-amd64.zip', version);
+//Returns version with proper v before it
+export function getValidVersion(version: string): string {
+    return "v" + version;
+} 
 
-        case 'Darwin':
-            return util.format('https://get.helm.sh/helm-%s-darwin-amd64.zip', version);
+// Downloads the helm releases JSON and parses all the recent versions of helm from it.
+// Defaults to sending stable helm version if none are valid or if it fails
 
-        case 'Windows_NT':
-        default:
-            return util.format('https://get.helm.sh/helm-%s-windows-amd64.zip', version);
+export async function getLatestHelmVersion(): Promise<string> {
+  const helmJSONPath: string = await toolCache.downloadTool(helmAllReleasesUrl);
 
+  try {
+    const helmJSON = JSON.parse(fs.readFileSync(helmJSONPath, "utf-8"));
+    for (let i in helmJSON) {
+      if (isValidVersion(helmJSON[i].tag_name)) {
+        return helmJSON[i].tag_name;
+      }
     }
-}
-
-async function getStableHelmVersion(): Promise<string> {
-    try {
-        const downloadPath = await toolCache.downloadTool(helmAllReleasesUrl);
-        const responseArray = JSON.parse(fs.readFileSync(downloadPath, 'utf8').toString().trim());
-        let latestHelmVersion = semver.clean(stableHelmVersion);
-        responseArray.forEach(response => {
-            if (response && response.tag_name) {
-                let currentHelmVerison = semver.clean(response.tag_name.toString());
-                if (currentHelmVerison) {
-                    if (currentHelmVerison.toString().indexOf('rc') == -1 && semver.gt(currentHelmVerison, latestHelmVersion)) {
-                        //If current helm version is not a pre release and is greater than latest helm version
-                        latestHelmVersion = currentHelmVerison;
-                    }
-                }
-            }
-        });
-        latestHelmVersion = "v" + latestHelmVersion;
-        return latestHelmVersion;
-    } catch (error) {
-        core.warning(util.format("Cannot get the latest Helm info from %s. Error %s. Using default Helm version %s.", helmAllReleasesUrl, error, stableHelmVersion));
-    }
-
+  } catch (err) {
+    core.warning(
+      util.format(
+        "Error while fetching the latest Helm release. Error: %s. Using default Helm version %s",
+        err.toString(),
+        stableHelmVersion
+      )
+    );
     return stableHelmVersion;
+  }
+
+  return stableHelmVersion;
 }
 
+// isValidVersion checks if verison is a stable release
+function isValidVersion(version: string): boolean {
+  return version.indexOf("rc") == -1;
+}
 
-var walkSync = function (dir, filelist, fileToFind) {
-    var files = fs.readdirSync(dir);
-    filelist = filelist || [];
-    files.forEach(function (file) {
-        if (fs.statSync(path.join(dir, file)).isDirectory()) {
-            filelist = walkSync(path.join(dir, file), filelist, fileToFind);
-        }
-        else {
-            core.debug(file);
-            if (file == fileToFind) {
-                filelist.push(path.join(dir, file));
-            }
-        }
-    });
-    return filelist;
+export function getExecutableExtension(): string {
+  if (os.type().match(/^Win/)) {
+    return ".exe";
+  }
+  return "";
+}
+
+const LINUX = "Linux";
+const MAC_OS = "Darwin";
+const WINDOWS = "Windows_NT";
+const ARM64 = "arm64";
+export function getHelmDownloadURL(version: string): string {
+  const arch = os.arch();
+  const operatingSystem = os.type();
+
+  switch (true) {
+    case operatingSystem == LINUX && arch == ARM64:
+      return util.format(
+        "https://get.helm.sh/helm-%s-linux-arm64.zip",
+        version
+      );
+    case operatingSystem == LINUX:
+      return util.format(
+        "https://get.helm.sh/helm-%s-linux-amd64.zip",
+        version
+      );
+
+    case operatingSystem == MAC_OS && arch == ARM64:
+      return util.format(
+        "https://get.helm.sh/helm-%s-darwin-arm64.zip",
+        version
+      );
+    case operatingSystem == MAC_OS:
+      return util.format(
+        "https://get.helm.sh/helm-%s-darwin-amd64.zip",
+        version
+      );
+
+    case operatingSystem == WINDOWS:
+    default:
+      return util.format(
+        "https://get.helm.sh/helm-%s-windows-amd64.zip",
+        version
+      );
+  }
+}
+
+export async function downloadHelm(version: string): Promise<string> {
+  let cachedToolpath = toolCache.find(helmToolName, version);
+  if (!cachedToolpath) {
+    let helmDownloadPath;
+    try {
+      helmDownloadPath = await toolCache.downloadTool(
+        getHelmDownloadURL(version)
+      );
+    } catch (exception) {
+      throw new Error(
+        util.format(
+          "Failed to download Helm from location",
+          getHelmDownloadURL(version)
+        )
+      );
+    }
+
+    fs.chmodSync(helmDownloadPath, "777");
+    const unzipedHelmPath = await toolCache.extractZip(helmDownloadPath);
+    cachedToolpath = await toolCache.cacheDir(
+      unzipedHelmPath,
+      helmToolName,
+      version
+    );
+  }
+
+  const helmpath = findHelm(cachedToolpath);
+  if (!helmpath) {
+    throw new Error(
+      util.format("Helm executable not found in path", cachedToolpath)
+    );
+  }
+
+  fs.chmodSync(helmpath, "777");
+  return helmpath;
+}
+
+export function findHelm(rootFolder: string): string {
+  fs.chmodSync(rootFolder, "777");
+  var filelist: string[] = [];
+  walkSync(rootFolder, filelist, helmToolName + getExecutableExtension());
+  if (!filelist || filelist.length == 0) {
+    throw new Error(
+      util.format("Helm executable not found in path", rootFolder)
+    );
+  } else {
+    return filelist[0];
+  }
+}
+
+export var walkSync = function (dir, filelist, fileToFind) {
+  var files = fs.readdirSync(dir);
+  filelist = filelist || [];
+  files.forEach(function (file) {
+    if (fs.statSync(path.join(dir, file)).isDirectory()) {
+      filelist = walkSync(path.join(dir, file), filelist, fileToFind);
+    } else {
+      core.debug(file);
+      if (file == fileToFind) {
+        filelist.push(path.join(dir, file));
+      }
+    }
+  });
+  return filelist;
 };
 
-async function downloadHelm(version: string): Promise<string> {
-    if (!version) { version = await getStableHelmVersion(); }
-    let cachedToolpath = toolCache.find(helmToolName, version);
-    if (!cachedToolpath) {
-        let helmDownloadPath;
-        try {
-            helmDownloadPath = await toolCache.downloadTool(getHelmDownloadURL(version));
-        } catch (exception) {
-            throw new Error(util.format("Failed to download Helm from location ", getHelmDownloadURL(version)));
-        }
-
-        fs.chmodSync(helmDownloadPath, '777');
-        const unzipedHelmPath = await toolCache.extractZip(helmDownloadPath);
-        cachedToolpath = await toolCache.cacheDir(unzipedHelmPath, helmToolName, version);
-    }
-
-    const helmpath = findHelm(cachedToolpath);
-    if (!helmpath) {
-        throw new Error(util.format("Helm executable not found in path ", cachedToolpath));
-    }
-
-    fs.chmodSync(helmpath, '777');
-    return helmpath;
-}
-
-function findHelm(rootFolder: string): string {
-    fs.chmodSync(rootFolder, '777');
-    var filelist: string[] = [];
-    walkSync(rootFolder, filelist, helmToolName + getExecutableExtension());
-    if (!filelist) {
-        throw new Error(util.format("Helm executable not found in path ", rootFolder));
-    }
-    else {
-        return filelist[0];
-    }
-}
-
-async function run() {
-    let version = core.getInput('version', { 'required': true });
-    if (version.toLocaleLowerCase() === 'latest') {
-        version = await getStableHelmVersion();
-    }
-
-    let cachedPath = await downloadHelm(version);
-
-    try {
-
-        if (!process.env['PATH'].startsWith(path.dirname(cachedPath))) {
-            core.addPath(path.dirname(cachedPath));
-        }
-    }
-    catch {
-        //do nothing, set as output variable
-    }
-
-    console.log(`Helm tool version: '${version}' has been cached at ${cachedPath}`);
-    core.setOutput('helm-path', cachedPath);
-}
-
-run().catch(core.setFailed);
+run().catch(core.setFailed);

tsconfig.json

@@ -45,7 +45,7 @@
     // "typeRoots": [],                       /* List of folders to include type definitions from. */
     // "types": [],                           /* Type declaration files to be included in compilation. */
     // "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
-    "esModuleInterop": true                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+    // "esModuleInterop": true                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
     // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
     // "allowUmdGlobalAccess": true,          /* Allow accessing UMD globals from modules. */
 
@@ -58,6 +58,7 @@
     /* Experimental Options */
     // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
     // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
+    "skipLibCheck": true
   },
   "exclude": ["node_modules", "**/*.test.ts"]
 }