diff --git a/packages/metro-bundler/src/Bundler/index.js b/packages/metro-bundler/src/Bundler/index.js index 628ffcbc..904ec9c1 100644 --- a/packages/metro-bundler/src/Bundler/index.js +++ b/packages/metro-bundler/src/Bundler/index.js @@ -194,8 +194,15 @@ class Bundler { const maxWorkerCount = Bundler.getMaxWorkerCount(); - /* $FlowFixMe: in practice it's always here. */ - this._transformer = new Transformer(opts.transformModulePath, maxWorkerCount); + this._transformer = new Transformer( + /* $FlowFixMe: in practice it's always here. */ + opts.transformModulePath, + maxWorkerCount, + { + stdoutChunk: chunk => opts.reporter.update({type: 'worker_stdout_chunk', chunk}), + stderrChunk: chunk => opts.reporter.update({type: 'worker_stderr_chunk', chunk}), + } + ); const getTransformCacheKey = (options) => { return transformCacheKey + getCacheKey(options); diff --git a/packages/metro-bundler/src/JSTransformer/__tests__/Transformer-test.js b/packages/metro-bundler/src/JSTransformer/__tests__/Transformer-test.js index 3b3f2948..fc334f79 100644 --- a/packages/metro-bundler/src/JSTransformer/__tests__/Transformer-test.js +++ b/packages/metro-bundler/src/JSTransformer/__tests__/Transformer-test.js @@ -9,6 +9,7 @@ 'use strict'; jest + .unmock('stream') .unmock('imurmurhash') .unmock('../../lib/ModuleTransport') .unmock('../'); @@ -24,6 +25,7 @@ jest.setMock('../../worker-farm', workerFarm); var Transformer = require('../'); const {any} = jasmine; +const {Readable} = require('stream'); describe('Transformer', function() { let workers, Cache; @@ -39,7 +41,7 @@ describe('Transformer', function() { workerFarm.mockImplementation((opts, path, methods) => { const api = workers = {}; methods.forEach(method => {api[method] = jest.fn();}); - return api; + return {methods: api, stdout: new Readable({read() {}}), stderr: new Readable({read() {}})}; }); }); diff --git a/packages/metro-bundler/src/JSTransformer/index.js b/packages/metro-bundler/src/JSTransformer/index.js index 98a08c82..931fcf40 100644 --- a/packages/metro-bundler/src/JSTransformer/index.js +++ b/packages/metro-bundler/src/JSTransformer/index.js @@ -50,6 +50,11 @@ function makeFarm(worker, methods, timeout, maxConcurrentWorkers) { ); } +type Reporters = { + +stdoutChunk: (chunk: string) => mixed, + +stderrChunk: (chunk: string) => mixed, +}; + class Transformer { _workers: {[name: string]: Function}; @@ -66,16 +71,24 @@ class Transformer { sourceMap: MappingsMap, ) => Promise<{code: string, map: MappingsMap}>; - constructor(transformModulePath: string, maxWorkerCount: number) { + constructor(transformModulePath: string, maxWorkerCount: number, reporters: Reporters) { invariant(path.isAbsolute(transformModulePath), 'transform module path should be absolute'); this._transformModulePath = transformModulePath; - this._workers = makeFarm( + const farm = makeFarm( require.resolve('./worker'), ['minify', 'transformAndExtractDependencies'], TRANSFORM_TIMEOUT_INTERVAL, maxWorkerCount, ); + farm.stdout.on('data', chunk => { + reporters.stdoutChunk(chunk.toString('utf8')); + }); + farm.stderr.on('data', chunk => { + reporters.stderrChunk(chunk.toString('utf8')); + }); + + this._workers = farm.methods; this._transform = denodeify(this._workers.transformAndExtractDependencies); this.minify = denodeify(this._workers.minify); } diff --git a/packages/metro-bundler/src/lib/TerminalReporter.js b/packages/metro-bundler/src/lib/TerminalReporter.js index 86baf1fa..d553444f 100644 --- a/packages/metro-bundler/src/lib/TerminalReporter.js +++ b/packages/metro-bundler/src/lib/TerminalReporter.js @@ -135,7 +135,6 @@ class TerminalReporter { } } - _logPackagerInitializing(port: number, projectRoots: Array) { terminal.log( formatBanner( @@ -183,7 +182,6 @@ class TerminalReporter { } } - /** * This function is only concerned with logging and should not do state * or terminal status updates. @@ -214,9 +212,25 @@ class TerminalReporter { case 'transform_cache_reset': reporting.logWarning(terminal, 'the transform cache was reset.'); break; + case 'worker_stdout_chunk': + this._logWorkerChunk('stdout', event.chunk); + break; + case 'worker_stderr_chunk': + this._logWorkerChunk('stderr', event.chunk); + break; } } + _logWorkerChunk(origin: 'stdout' | 'stderr', chunk: string) { + const lines = chunk.split('\n'); + if (lines.length >= 1 && lines[lines.length - 1] === '') { + lines.splice(lines.length - 1, 1); + } + lines.forEach(line => { + terminal.log(`transform[${origin}]: ${line}`); + }); + } + /** * We use Math.pow(ratio, 2) to as a conservative measure of progress because * we know the `totalCount` is going to progressively increase as well. We diff --git a/packages/metro-bundler/src/lib/reporting.js b/packages/metro-bundler/src/lib/reporting.js index 29994435..50c5c60f 100644 --- a/packages/metro-bundler/src/lib/reporting.js +++ b/packages/metro-bundler/src/lib/reporting.js @@ -59,6 +59,12 @@ export type ReportableEvent = { reason: GlobalCacheDisabledReason, } | { type: 'transform_cache_reset', +} | { + type: 'worker_stdout_chunk', + chunk: string, +} | { + type: 'worker_stderr_chunk', + chunk: string, }; /** diff --git a/packages/metro-bundler/src/worker-farm/lib/farm.js b/packages/metro-bundler/src/worker-farm/lib/farm.js index d9e2527a..14c3d12c 100644 --- a/packages/metro-bundler/src/worker-farm/lib/farm.js +++ b/packages/metro-bundler/src/worker-farm/lib/farm.js @@ -27,10 +27,14 @@ const extend = require('xtend') , ProcessTerminatedError = require('errno').create('ProcessTerminatedError') , MaxConcurrentCallsError = require('errno').create('MaxConcurrentCallsError') +const mergeStream = require('merge-stream'); + function Farm (options: {+execArgv: Array}, path: string) { this.options = extend(DEFAULT_OPTIONS, options) this.path = path this.activeCalls = 0 + this.stdout = mergeStream(); + this.stderr = mergeStream(); } // make a handle to pass back in the form of an external API @@ -118,6 +122,9 @@ Farm.prototype.startChild = function () { , exitCode : null } + this.stdout.add(forked.child.stdout); + this.stderr.add(forked.child.stderr); + forked.child.on('message', this.receive.bind(this)) forked.child.once('exit', function (code) { c.exitCode = code diff --git a/packages/metro-bundler/src/worker-farm/lib/fork.js b/packages/metro-bundler/src/worker-farm/lib/fork.js index e1b39877..f3ea06c3 100644 --- a/packages/metro-bundler/src/worker-farm/lib/fork.js +++ b/packages/metro-bundler/src/worker-farm/lib/fork.js @@ -16,9 +16,10 @@ const childModule = require.resolve('./child/index'); function fork(forkModule: string, options: {|+execArgv: Array|}) { const child = childProcess.fork(childModule, { - env: process.env, cwd: process.cwd(), + env: process.env, execArgv: options.execArgv, + silent: true, }); child.send({module: forkModule}); diff --git a/packages/metro-bundler/src/worker-farm/lib/index.js b/packages/metro-bundler/src/worker-farm/lib/index.js index a5610145..8857b6ab 100644 --- a/packages/metro-bundler/src/worker-farm/lib/index.js +++ b/packages/metro-bundler/src/worker-farm/lib/index.js @@ -12,20 +12,31 @@ /* eslint-disable */ const Farm = require('./farm') +import type {Readable} from 'stream'; + var farms = [] // keep record of farms so we can end() them if required +export type FarmAPI = {| + methods: {[name: string]: Function}, + stdout: Readable, + stderr: Readable, +|}; + function farm( options: {+execArgv: Array}, path: string, methods: Array, -): {[name: string]: Function} { +): FarmAPI { var f = new Farm(options, path) , api = f.setup(methods) farms.push({ farm: f, api: api }) + // $FlowFixMe: gotta type the Farm class. + const {stdout, stderr} = f; + // return the public API - return (api: any) + return {methods: (api: any), stdout, stderr}; } function end (api, callback) {