angular-cn/tools/tsc-watch/index.ts

import {spawn} from 'child_process';
import {TscWatch, TSC, reportError} from './tsc_watch';
import {writeFileSync, mkdirSync, existsSync} from 'fs';
export * from './tsc_watch';
import 'reflect-metadata';

const OFFLINE_COMPILE =
    [
      'output/output_emitter_codegen_untyped',
      'output/output_emitter_codegen_typed',
      'offline_compiler_codegen_untyped',
      'offline_compiler_codegen_typed'
    ]

    function
    processOutputEmitterCodeGen():
        Promise<number> {
          return new Promise((resolve, reject) => {
                   var outDir = 'dist/all/@angular/compiler/test/';
                   var promises = [];
                   console.log('Processing codegen...');
                   OFFLINE_COMPILE.forEach((file: string) => {
                     var codegen = require('../../all/@angular/compiler/test/' + file + '.js');
                     if (codegen.emit) {
                       console.log(`  ${file} has changed, regenerating...`);
                       promises.push(
                           Promise.resolve(codegen.emit())
                               .then((code) => { writeFileSync(outDir + file + '.ts', code); }));
                     }
                   });
                   if (promises.length) {
                     Promise.all(promises)
                         .then(() => {
                           var args = [
                             '--project',
                             'tools/cjs-jasmine/tsconfig-output_emitter_codegen.json'
                           ];
                           console.log('    compiling changes: tsc ' + args.join(' '));
                           var tsc = spawn(TSC, args, {stdio: 'pipe'});
                           tsc.stdout.on('data', (data) => process.stdout.write(data));
                           tsc.stderr.on('data', (data) => process.stderr.write(data));
                           tsc.on('close', (code) => code ? reject('Tsc exited with: ' + code) :
                                                            resolve(code));
                         })
                         .catch(reportError);
                   } else {
                     resolve(0);
                   }
                 })
              .catch(reportError);
        }

function md(dir: string, folders: string[]) {
  if (folders.length) {
    var next = folders.shift();
    var path = dir + '/' + next;
    if (!existsSync(path)) {
      mkdirSync(path);
    }
    md(path, folders);
  }
}

var tscWatch: TscWatch = null;
var platform = process.argv.length >= 3 ? process.argv[2] : null;
var watch: boolean = process.argv.length >= 4 ? !!process.argv[3] : false;

if (platform == 'node') {
  tscWatch = new TscWatch({
    tsconfig: 'modules/tsconfig.json',
    start: 'File change detected. Starting incremental compilation...',
    error: 'error',
    complete: 'Compilation complete. Watching for file changes.',
    onChangeCmds: [
      processOutputEmitterCodeGen,
      ['node', 'dist/tools/cjs-jasmine', '--', '{@angular,benchpress}/**/*_spec.js']
    ]
  });
} else if (platform == 'browser') {
  tscWatch = new TscWatch({
    tsconfig: 'modules/tsconfig.json',
    start: 'File change detected. Starting incremental compilation...',
    error: 'error',
    complete: 'Compilation complete. Watching for file changes.',
    onStartCmds:
        [['node', 'node_modules/karma/bin/karma', 'start', '--no-auto-watch', 'karma-js.conf.js']],
    onChangeCmds: [['node', 'node_modules/karma/bin/karma', 'run', 'karma-js.conf.js']]
  });
}

watch ? tscWatch.watch() : tscWatch.run();