Adding graph ql for Helm versions (#21)

* Adding graphql query to fetch latest helm release of specified type

* Updating typescript version and js file

* Fixing PR comments in release

* Adding feature flag as environment variable in release

* Changing feature flag name

* Updating files as per latest changes in master after resolving merge conflicts

* Removing non prod modules

Author: shigupt202

action.yml

@@ -5,6 +5,10 @@ inputs:
     description: 'Version of helm'
     required: true
     default: 'latest'
+  token:
+    description: 'Github token'
+    default: ${{ github.token }}
+    required: true
 outputs:
   helm-path:
     description: 'Path to the cached helm binary'

lib/run.js

@@ -1,6 +1,26 @@
 "use strict";
 // Copyright (c) Microsoft Corporation.
+// Copyright (c) Microsoft Corporation.
 // Licensed under the MIT license.
+var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
+}) : (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 (mod) {
+    if (mod && mod.__esModule) return mod;
+    var result = {};
+    if (mod != null) for (var k in mod) if (k !== "default" && Object.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
+    __setModuleDefault(result, mod);
+    return result;
+};
 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) {
@@ -10,30 +30,30 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
         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 });
+exports.run = exports.findHelm = exports.downloadHelm = exports.walkSync = exports.getStableHelmVersion = exports.getHelmDownloadURL = exports.getExecutableExtension = void 0;
 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 graphql_1 = require("@octokit/graphql");
 const helmToolName = 'helm';
 const stableHelmVersion = 'v3.2.1';
+const stableHelm3Version = 'v3.5.3';
+const stableHelm2Version = 'v2.17.0';
+const LATEST_HELM2_VERSION = '2.*';
+const LATEST_HELM3_VERSION = '3.*';
 const helmAllReleasesUrl = 'https://api.github.com/repos/helm/helm/releases';
 function getExecutableExtension() {
     if (os.type().match(/^Win/)) {
         return '.exe';
     }
     return '';
 }
+exports.getExecutableExtension = getExecutableExtension;
 function getHelmDownloadURL(version) {
     switch (os.type()) {
         case 'Linux':
@@ -45,6 +65,7 @@ function getHelmDownloadURL(version) {
             return util.format('https://get.helm.sh/helm-%s-windows-amd64.zip', version);
     }
 }
+exports.getHelmDownloadURL = getHelmDownloadURL;
 function getStableHelmVersion() {
     return __awaiter(this, void 0, void 0, function* () {
         try {
@@ -71,12 +92,13 @@ function getStableHelmVersion() {
         return stableHelmVersion;
     });
 }
-var walkSync = function (dir, filelist, fileToFind) {
+exports.getStableHelmVersion = getStableHelmVersion;
+exports.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);
+            filelist = exports.walkSync(path.join(dir, file), filelist, fileToFind);
         }
         else {
             core.debug(file);
@@ -113,26 +135,81 @@ function downloadHelm(version) {
         return helmpath;
     });
 }
+exports.downloadHelm = downloadHelm;
+function getLatestHelmVersionFor(type) {
+    return __awaiter(this, void 0, void 0, function* () {
+        const token = core.getInput('token', { 'required': true });
+        try {
+            const { repository } = yield graphql_1.graphql(`{
+                repository(name: "helm", owner: "helm") {
+                    releases(last: 100)  {
+                        nodes {
+                            tagName
+                        }
+                    }
+                }
+            }`, {
+                headers: {
+                    authorization: `token ${token}`
+                }
+            });
+            const releases = repository.releases.nodes.reverse();
+            let latestValidRelease = releases.find(release => isValidVersion(release.tagName, type));
+            if (latestValidRelease)
+                return latestValidRelease.tagName;
+        }
+        catch (err) {
+            core.warning(util.format("Error while fetching the latest Helm %s release. Error: %s. Using default Helm version %s.", type, err.toString(), getStableHelmVersionFor(type)));
+            return getStableHelmVersionFor(type);
+        }
+        core.warning(util.format("Could not find stable release for Helm %s. Using default Helm version %s.", type, getStableHelmVersionFor(type)));
+        return getStableHelmVersionFor(type);
+    });
+}
+function getStableHelmVersionFor(type) {
+    return type === "v2" ? stableHelm2Version : stableHelm3Version;
+}
+// isValidVersion checks if verison matches the specified type and is a stable release
+function isValidVersion(version, type) {
+    if (!version.toLocaleLowerCase().startsWith(type))
+        return false;
+    return version.indexOf('rc') == -1;
+}
 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));
+    exports.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];
     }
 }
+exports.findHelm = findHelm;
 function run() {
     return __awaiter(this, void 0, void 0, function* () {
         let version = core.getInput('version', { 'required': true });
-        if (version.toLocaleLowerCase() === 'latest') {
-            version = yield getStableHelmVersion();
+        if (process.env['HELM_INSTALLER_LEGACY_VERSIONING'] == 'true') {
+            if (version.toLocaleLowerCase() === 'latest') {
+                version = yield getStableHelmVersion();
+            }
+            else if (!version.toLocaleLowerCase().startsWith('v')) {
+                version = 'v' + version;
+            }
         }
-        else if (!version.toLocaleLowerCase().startsWith('v')) {
-            version = 'v' + version;
+        else {
+            if (version.toLocaleLowerCase() === 'latest' || version === LATEST_HELM3_VERSION) {
+                version = yield getLatestHelmVersionFor("v3");
+            }
+            else if (version === LATEST_HELM2_VERSION) {
+                version = yield getLatestHelmVersionFor("v2");
+            }
+            else if (!version.toLocaleLowerCase().startsWith('v')) {
+                version = 'v' + version;
+            }
         }
+        core.debug(util.format("Downloading %s", version));
         let cachedPath = yield downloadHelm(version);
         try {
             if (!process.env['PATH'].startsWith(path.dirname(cachedPath))) {
@@ -146,4 +223,5 @@ function run() {
         core.setOutput('helm-path', cachedPath);
     });
 }
+exports.run = run;
 run().catch(core.setFailed);