First attempt at find ruby action

lib/find-ruby.js

@@ -0,0 +1,62 @@
+"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
+        }
+        //core.setOutput('ruby-location', toolPath);
+        if (inputs.addToPath === 'true') {
+            core.addPath(toolPath);
+        }
+    });
+}
+exports.default = default_1;