code-server/build/lib/optimize.ts

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/*---------------------------------------------------------------------------------------------
* 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 es from 'event-stream';
import * as gulp from 'gulp';
import * as concat from 'gulp-concat';
import * as minifyCSS from 'gulp-cssnano';
import * as filter from 'gulp-filter';
import * as flatmap from 'gulp-flatmap';
import * as sourcemaps from 'gulp-sourcemaps';
import * as uglify from 'gulp-uglify';
import * as composer from 'gulp-uglify/composer';
import * as fancyLog from 'fancy-log';
import * as ansiColors from 'ansi-colors';
import * as path from 'path';
import * as pump from 'pump';
import * as terser from 'terser';
import * as VinylFile from 'vinyl';
import * as bundle from './bundle';
import { Language, processNlsFiles } from './i18n';
import { createStatsStream } from './stats';
import * as util from './util';
const REPO_ROOT_PATH = path.join(__dirname, '../..');
function log(prefix: string, message: string): void {
fancyLog(ansiColors.cyan('[' + prefix + ']'), message);
}
export function loaderConfig() {
const result: any = {
paths: {
'vs': 'out-build/vs',
'vscode': 'empty:'
},
amdModulesPattern: /^vs\//
};
result['vs/css'] = { inlineResources: true };
return result;
}
const IS_OUR_COPYRIGHT_REGEXP = /Copyright \(C\) Microsoft Corporation/i;
function loader(src: string, bundledFileHeader: string, bundleLoader: boolean): NodeJS.ReadWriteStream {
let sources = [
`${src}/vs/loader.js`
];
if (bundleLoader) {
sources = sources.concat([
`${src}/vs/css.js`,
`${src}/vs/nls.js`
]);
}
let isFirst = true;
return (
gulp
.src(sources, { base: `${src}` })
.pipe(es.through(function (data) {
if (isFirst) {
isFirst = false;
this.emit('data', new VinylFile({
path: 'fake',
base: '.',
contents: Buffer.from(bundledFileHeader)
}));
this.emit('data', data);
} else {
this.emit('data', data);
}
}))
.pipe(concat('vs/loader.js'))
);
}
function toConcatStream(src: string, bundledFileHeader: string, sources: bundle.IFile[], dest: string, fileContentMapper: (contents: string, path: string) => string): NodeJS.ReadWriteStream {
const useSourcemaps = /\.js$/.test(dest) && !/\.nls\.js$/.test(dest);
// If a bundle ends up including in any of the sources our copyright, then
// insert a fake source at the beginning of each bundle with our copyright
let containsOurCopyright = false;
for (let i = 0, len = sources.length; i < len; i++) {
const fileContents = sources[i].contents;
if (IS_OUR_COPYRIGHT_REGEXP.test(fileContents)) {
containsOurCopyright = true;
break;
}
}
if (containsOurCopyright) {
sources.unshift({
path: null,
contents: bundledFileHeader
});
}
const treatedSources = sources.map(function (source) {
const root = source.path ? REPO_ROOT_PATH.replace(/\\/g, '/') : '';
const base = source.path ? root + `/${src}` : '.';
const path = source.path ? root + '/' + source.path.replace(/\\/g, '/') : 'fake';
const contents = source.path ? fileContentMapper(source.contents, path) : source.contents;
return new VinylFile({
path: path,
base: base,
contents: Buffer.from(contents)
});
});
return es.readArray(treatedSources)
.pipe(useSourcemaps ? util.loadSourcemaps() : es.through())
.pipe(concat(dest))
.pipe(createStatsStream(dest));
}
function toBundleStream(src: string, bundledFileHeader: string, bundles: bundle.IConcatFile[], fileContentMapper: (contents: string, path: string) => string): NodeJS.ReadWriteStream {
return es.merge(bundles.map(function (bundle) {
return toConcatStream(src, bundledFileHeader, bundle.sources, bundle.dest, fileContentMapper);
}));
}
export interface IOptimizeTaskOpts {
/**
* The folder to read files from.
*/
src: string;
/**
* (for AMD files, will get bundled and get Copyright treatment)
*/
entryPoints: bundle.IEntryPoint[];
/**
* (svg, etc.)
*/
resources: string[];
loaderConfig: any;
/**
* (true by default - append css and nls to loader)
*/
bundleLoader?: boolean;
/**
* (basically the Copyright treatment)
*/
header?: string;
/**
* (emit bundleInfo.json file)
*/
bundleInfo: boolean;
/**
* (out folder name)
*/
out: string;
/**
* (out folder name)
*/
languages?: Language[];
/**
* File contents interceptor
* @param contents The contens of the file
* @param path The absolute file path, always using `/`, even on Windows
*/
fileContentMapper?: (contents: string, path: string) => string;
}
const DEFAULT_FILE_HEADER = [
'/*!--------------------------------------------------------',
' * Copyright (C) Microsoft Corporation. All rights reserved.',
' *--------------------------------------------------------*/'
].join('\n');
export function optimizeTask(opts: IOptimizeTaskOpts): () => NodeJS.ReadWriteStream {
const src = opts.src;
const entryPoints = opts.entryPoints;
const resources = opts.resources;
const loaderConfig = opts.loaderConfig;
const bundledFileHeader = opts.header || DEFAULT_FILE_HEADER;
const bundleLoader = (typeof opts.bundleLoader === 'undefined' ? true : opts.bundleLoader);
const out = opts.out;
const fileContentMapper = opts.fileContentMapper || ((contents: string, _path: string) => contents);
return function () {
const bundlesStream = es.through(); // this stream will contain the bundled files
const resourcesStream = es.through(); // this stream will contain the resources
const bundleInfoStream = es.through(); // this stream will contain bundleInfo.json
bundle.bundle(entryPoints, loaderConfig, function (err, result) {
if (err || !result) { return bundlesStream.emit('error', JSON.stringify(err)); }
toBundleStream(src, bundledFileHeader, result.files, fileContentMapper).pipe(bundlesStream);
// Remove css inlined resources
const filteredResources = resources.slice();
result.cssInlinedResources.forEach(function (resource) {
if (process.env['VSCODE_BUILD_VERBOSE']) {
log('optimizer', 'excluding inlined: ' + resource);
}
filteredResources.push('!' + resource);
});
gulp.src(filteredResources, { base: `${src}`, allowEmpty: true }).pipe(resourcesStream);
const bundleInfoArray: VinylFile[] = [];
if (opts.bundleInfo) {
bundleInfoArray.push(new VinylFile({
path: 'bundleInfo.json',
base: '.',
contents: Buffer.from(JSON.stringify(result.bundleData, null, '\t'))
}));
}
es.readArray(bundleInfoArray).pipe(bundleInfoStream);
});
const result = es.merge(
loader(src, bundledFileHeader, bundleLoader),
bundlesStream,
resourcesStream,
bundleInfoStream
);
return result
.pipe(sourcemaps.write('./', {
sourceRoot: undefined,
addComment: true,
includeContent: true
}))
.pipe(opts.languages && opts.languages.length ? processNlsFiles({
fileHeader: bundledFileHeader,
languages: opts.languages
}) : es.through())
.pipe(gulp.dest(out));
};
}
declare class FileWithCopyright extends VinylFile {
public __hasOurCopyright: boolean;
}
/**
* Wrap around uglify and allow the preserveComments function
* to have a file "context" to include our copyright only once per file.
*/
function uglifyWithCopyrights(): NodeJS.ReadWriteStream {
const preserveComments = (f: FileWithCopyright) => {
return (_node: any, comment: { value: string; type: string; }) => {
const text = comment.value;
const type = comment.type;
if (/@minifier_do_not_preserve/.test(text)) {
return false;
}
const isOurCopyright = IS_OUR_COPYRIGHT_REGEXP.test(text);
if (isOurCopyright) {
if (f.__hasOurCopyright) {
return false;
}
f.__hasOurCopyright = true;
return true;
}
if ('comment2' === type) {
// check for /*!. Note that text doesn't contain leading /*
return (text.length > 0 && text[0] === '!') || /@preserve|license|@cc_on|copyright/i.test(text);
} else if ('comment1' === type) {
return /license|copyright/i.test(text);
}
return false;
};
};
const minify = (composer as any)(terser);
const input = es.through();
const output = input
.pipe(flatmap((stream, f) => {
return stream.pipe(minify({
output: {
comments: preserveComments(<FileWithCopyright>f),
max_line_len: 1024
}
}));
}));
return es.duplex(input, output);
}
export function minifyTask(src: string, sourceMapBaseUrl?: string): (cb: any) => void {
const sourceMappingURL = sourceMapBaseUrl ? ((f: any) => `${sourceMapBaseUrl}/${f.relative}.map`) : undefined;
return cb => {
const jsFilter = filter('**/*.js', { restore: true });
const cssFilter = filter('**/*.css', { restore: true });
pump(
gulp.src([src + '/**', '!' + src + '/**/*.map']),
jsFilter,
sourcemaps.init({ loadMaps: true }),
uglifyWithCopyrights(),
jsFilter.restore,
cssFilter,
minifyCSS({ reduceIdents: false }),
cssFilter.restore,
(<any>sourcemaps).mapSources((sourcePath: string) => {
if (sourcePath === 'bootstrap-fork.js') {
return 'bootstrap-fork.orig.js';
}
return sourcePath;
}),
sourcemaps.write('./', {
sourceMappingURL,
sourceRoot: undefined,
includeContent: true,
addComment: true
} as any),
gulp.dest(src + '-min')
, (err: any) => {
if (err instanceof (uglify as any).GulpUglifyError) {
console.error(`Uglify error in '${err.cause && err.cause.filename}'`);
}
cb(err);
});
};
}