First attempt at find ruby action

__tests__/main.test.ts

@@ -1,3 +1,7 @@
+import findRuby, {Platform} from '../src/find-ruby';
+
 describe('TODO - Add a test suite', () => {
-  it('TODO - Add a test', async () => {});
+  it('TODO - Add a test', async () => {
+    findRuby({addToPath: 'true', version: '>= 2.4'}, Platform.Windows);
+  });
 });

action.yml

@@ -3,8 +3,12 @@ description: 'Setup a Ruby environment and add it to the PATH'
 author: 'GitHub'
 inputs: 
   version:
-    description: 'The Ruby version to use. Defaults to >= 2.4'
+    description: 'Version range or exact version of a Ruby version to use.'
     default: '>= 2.4'
+  add-to-path:
+    description: 'Prepend the retrieved Ruby version to the PATH environment variable to make it available in subsequent actions or scripts without using the output variable.'
+    default: 'true'
+
 runs:
   using: 'node'
   main: 'lib/main.js'

lib/find-ruby.js

@@ -0,0 +1,61 @@
+"use strict";
+var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
+    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) : new P(function (resolve) { resolve(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 core = __importStar(require("@actions/core"));
+const exec = __importStar(require("@actions/exec"));
+const tc = __importStar(require("@actions/tool-cache"));
+const os = __importStar(require("os"));
+const path = __importStar(require("path"));
+var Platform;
+(function (Platform) {
+    Platform[Platform["Windows"] = 0] = "Windows";
+    Platform[Platform["MacOS"] = 1] = "MacOS";
+    Platform[Platform["Linux"] = 2] = "Linux";
+})(Platform = exports.Platform || (exports.Platform = {}));
+function getPlatform() {
+    switch (os.platform()) {
+        case 'win32':
+            return Platform.Windows;
+        case 'darwin':
+            return Platform.MacOS;
+        case 'linux':
+            return Platform.Linux;
+        default:
+            throw Error('Platform not recognized');
+    }
+}
+exports.getPlatform = getPlatform;
+function default_1(inputs, platform) {
+    return __awaiter(this, void 0, void 0, function* () {
+        const installDir = tc.find('Ruby', inputs.version);
+        if (!installDir) {
+            throw new Error(`Version ${inputs.version} not found`);
+        }
+        const toolPath = path.join(installDir, 'bin');
+        if (platform !== Platform.Windows) {
+            // Ruby / Gem heavily use the '#!/usr/bin/ruby' to find ruby, so this task needs to
+            // replace that version of ruby so all the correct version of ruby gets selected
+            // replace the default
+            const dest = '/usr/bin/ruby';
+            exec.exec('sudo ln', ['-sf', path.join(toolPath, 'ruby'), dest]); // replace any existing
+        }
+        if (inputs.addToPath === 'true') {
+            core.addPath(toolPath);
+        }
+    });
+}
+exports.default = default_1;

lib/main.js

@@ -16,10 +16,17 @@ var __importStar = (this && this.__importStar) || function (mod) {
 };
 Object.defineProperty(exports, "__esModule", { value: true });
 const core = __importStar(require("@actions/core"));
+const find_ruby_1 = __importStar(require("./find-ruby"));
 function run() {
     return __awaiter(this, void 0, void 0, function* () {
-        const myInput = core.getInput('myInput');
-        core.debug(`Hello ${myInput}`);
+        try {
+            const version = core.getInput('version');
+            const addToPath = core.getInput('add-to-path');
+            yield find_ruby_1.default({ version, addToPath }, find_ruby_1.getPlatform());
+        }
+        catch (error) {
+            core.setFailed(error.message);
+        }
     });
 }
 run();

src/find-ruby.ts

@@ -0,0 +1,51 @@
+import * as core from '@actions/core';
+import * as exec from '@actions/exec';
+import * as tc from '@actions/tool-cache';
+import * as os from 'os';
+import * as path from 'path';
+
+export enum Platform {
+  Windows,
+  MacOS,
+  Linux
+}
+
+export function getPlatform(): Platform {
+  switch (os.platform()) {
+    case 'win32':
+      return Platform.Windows;
+    case 'darwin':
+      return Platform.MacOS;
+    case 'linux':
+      return Platform.Linux;
+    default:
+      throw Error('Platform not recognized');
+  }
+}
+
+interface ActionInputs {
+  version: string;
+  addToPath: string;
+}
+
+export default async function(inputs: ActionInputs, platform: Platform) {
+  const installDir: string | null = tc.find('Ruby', inputs.version);
+
+  if (!installDir) {
+    throw new Error(`Version ${inputs.version} not found`);
+  }
+
+  const toolPath: string = path.join(installDir, 'bin');
+
+  if (platform !== Platform.Windows) {
+    // Ruby / Gem heavily use the '#!/usr/bin/ruby' to find ruby, so this task needs to
+    // replace that version of ruby so all the correct version of ruby gets selected
+    // replace the default
+    const dest: string = '/usr/bin/ruby';
+    exec.exec('sudo ln', ['-sf', path.join(toolPath, 'ruby'), dest]); // replace any existing
+  }
+
+  if (inputs.addToPath === 'true') {
+    core.addPath(toolPath);
+  }
+}

src/main.ts

@@ -1,8 +1,14 @@
 import * as core from '@actions/core';
+import findRubyVersion, {getPlatform} from './find-ruby';
 
 async function run() {
-  const myInput = core.getInput('myInput');
-  core.debug(`Hello ${myInput}`);
+  try {
+    const version = core.getInput('version');
+    const addToPath = core.getInput('add-to-path');
+    await findRubyVersion({version, addToPath}, getPlatform());
+  } catch (error) {
+    core.setFailed(error.message);
+  }
 }
 
 run();