chore: add run-lerna script to run lerna with repo root

The script sets `LERNA_ROOT_PATH` to the root directory of loopback-next
monorepo and run `lerna` commands. It also detects VSCode and disables
parallel mode.

Author: raymondfeng

bin/run-lerna.js

@@ -0,0 +1,43 @@
+#!/usr/bin/env node
+// Copyright IBM Corp. 2017,2018. All Rights Reserved.
+// Node module: @loopback/cli
+// This file is licensed under the MIT License.
+// License text available at https://opensource.org/licenses/MIT
+
+/**
+ * This is an internal script to run `lerna` command with enviornment variable
+ * `LERNA_ROOT_PATH` set to the root directory of `loopback-next` monorepo
+ */
+'use strict';
+
+const path = require('path');
+const lerna = require('lerna');
+const build = require('../packages/build');
+
+/**
+ * Check if the script is running within Visual Studio Code
+ */
+function isVSCode() {
+  return Object.keys(process.env).some(k => k.indexOf('VSCODE') === 0);
+}
+
+function run(argv, options) {
+  const ls = new lerna.LsCommand(
+    null,
+    {json: true, loglevel: 'silent'},
+    path.join(__dirname, '..'),
+  );
+  const rootPath = ls.repository.rootPath;
+
+  process.env.LERNA_ROOT_PATH = rootPath;
+  let args = argv.slice(2);
+
+  // Force lerna command runs in non-parallel mode for VSCode builds
+  if (isVSCode()) {
+    args = args.filter(arg => arg !== '--parallel');
+  }
+  return build.runCLI('lerna/bin/lerna', args, options);
+}
+
+module.exports = run;
+if (require.main === module) run(process.argv);

package.json

@@ -36,7 +36,7 @@
     "prettier:fix": "npm run prettier:cli -- --write",
     "clean": "lerna run clean --loglevel=silent --parallel && node packages/build/bin/run-clean \"packages/*/dist*\"",
     "clean:lerna": "lerna clean --yes --parallel --loglevel=silent",
-    "build": "lerna run build --parallel --loglevel=silent",
+    "build": "node bin/run-lerna run build --parallel --loglevel=silent",
     "build:full": "npm run clean:lerna && npm run bootstrap && npm test",
     "pretest": "npm run clean && npm run build",
     "test": "node packages/build/bin/run-nyc npm run mocha --scripts-prepend-node-path",

packages/build/bin/compile-package.js

@@ -100,8 +100,10 @@ function run(argv, options) {
 
   const args = [];
 
+  const cwd = process.env.LERNA_ROOT_PATH || process.cwd();
   if (tsConfigFile) {
-    args.push('-p', tsConfigFile);
+    // Make the config file relative the current directory
+    args.push('-p', path.relative(cwd, tsConfigFile));
   }
 
   if (outDir) {
@@ -114,7 +116,12 @@ function run(argv, options) {
 
   args.push(...compilerOpts);
 
-  return utils.runCLI('typescript/lib/tsc', args, options);
+  if (options === true) {
+    options = {dryRun: true};
+  } else {
+    options = options || {};
+  }
+  return utils.runCLI('typescript/lib/tsc', args, {cwd, ...options});
 }
 
 module.exports = run;