Compute node modules cache key in JS to avoid globbing

build/azure-pipelines/common/computeNodeModulesCacheKey.ts

@@ -0,0 +1,32 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+'use strict';
+
+import * as fs from 'fs';
+import * as path from 'path';
+import * as crypto from 'crypto';
+const { dirs } = require('../../npm/dirs');
+
+const ROOT = path.join(__dirname, '../../../');
+
+const shasum = crypto.createHash('sha1');
+
+shasum.update(fs.readFileSync(path.join(ROOT, 'build/.cachesalt')));
+shasum.update(fs.readFileSync(path.join(ROOT, '.yarnrc')));
+shasum.update(fs.readFileSync(path.join(ROOT, 'remote/.yarnrc')));
+
+// Add `yarn.lock` files
+for (let dir of dirs) {
+	const yarnLockPath = path.join(ROOT, dir, 'yarn.lock');
+	shasum.update(fs.readFileSync(yarnLockPath));
+}
+
+// Add any other command line arguments
+for (let i = 2; i < process.argv.length; i++) {
+	shasum.update(process.argv[i]);
+}
+
+process.stdout.write(shasum.digest('hex'));