mirror of
https://github.com/whoisclebs/lodash.git
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lodash: Cleanup build scripts and add @kitcambridge as a contributor. [jddalton]
Former-commit-id: 8e37a98f155b8b2bd8ed35a993d83022ac610620
This commit is contained in:
John-David Dalton
264
build.js
264
build.js
@@ -1,136 +1,178 @@
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#!/usr/bin/env node
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;(function () {
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;(function() {
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'use strict';
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/* Load the Node file system, path, and child process modules. */
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var fs = require('fs'), path = require('path'), spawn = require('child_process').spawn,
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/** The Node filesystem, path, and child process modules */
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var fs = require('fs'),
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path = require('path'),
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spawn = require('child_process').spawn;
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/* Load the UglifyJS compressor. */
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uglifyJS = require(path.join(__dirname, 'vendor', 'uglifyjs', 'uglify-js')),
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/* The `build` directory, containing the build scripts. */
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buildPath = path.join(__dirname, 'build'),
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/* The distribution directory. */
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distPath = path.join(__dirname, 'dist'),
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/** The build directory containing the build scripts */
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var buildPath = path.join(__dirname, 'build');
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/* Load the pre- and post-processors. */
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preprocess = require(path.join(buildPath, 'pre-compile')),
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postprocess = require(path.join(buildPath, 'post-compile')),
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/** The distribution directory */
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var distPath = path.join(__dirname, 'dist');
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/* The pre-processed Lo-Dash source. */
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source = preprocess(fs.readFileSync(path.join(__dirname, 'lodash.js'), 'utf8'));
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/** Load the pre- and post-processors */
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var preprocess = require(path.join(buildPath, 'pre-compile')),
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postprocess = require(path.join(buildPath, 'post-compile'));
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/* Create the destination directory if it doesn't exist. */
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if (!path.existsSync(distPath)) {
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fs.mkdirSync(distPath);
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/** The pre-processed Lo-Dash source */
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var source = preprocess(fs.readFileSync(path.join(__dirname, 'lodash.js'), 'utf8'));
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/** Load the UglifyJS compressor */
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var uglifyJS = require(path.join(__dirname, 'vendor', 'uglifyjs', 'uglify-js'));
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/*--------------------------------------------------------------------------*/
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/**
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* Compresses a `source` string using the Closure Compiler. Yields the
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* minified result, and any exceptions encountered, to a `callback` function.
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*
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* @private
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* @param {String} source The JavaScript source to minify.
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* @param {Function} callback The function called when minifying is complete.
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*/
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function compile(source, callback) {
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var stderr = '',
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stdout = '';
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var compiler = spawn('java', [
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// load the Closure Compiler and set the compression options
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'-jar', path.join(__dirname, 'vendor', 'closure-compiler', 'compiler.jar'),
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'--compilation_level=ADVANCED_OPTIMIZATIONS',
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'--language_in=ECMASCRIPT5_STRICT',
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'--warning_level=QUIET'
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]);
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// explicitly set the encoding of the output and error streams
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compiler.stdout.setEncoding('utf8');
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compiler.stderr.setEncoding('utf8');
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compiler.stdout.on('data', function(data) {
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stdout += data;
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});
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compiler.stderr.on('data', function(data) {
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stderr += data;
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});
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compiler.on('exit', function(status) {
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var exception = null;
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if (status) {
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exception = new Error(stderr);
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exception.status = status;
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}
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callback(exception, stdout);
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});
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// proxy the source string to Closure Compiler
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compiler.stdin.end(source);
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}
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/* Compress and `gzip` Lo-Dash using the Closure Compiler. */
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compile(source, function (exception, results) {
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if (exception) {
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throw exception;
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}
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// Post-process the minified source.
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var source = postprocess(results);
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// Save the final minified version.
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fs.writeFileSync(path.join(distPath, 'lodash.compiler.js'), source);
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gzip(source, function (exception, results) {
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if (exception) {
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throw exception;
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}
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// Save the `gzip`-ed version. The explicit `binary` encoding is
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// necessary to ensure that the stream is written correctly.
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fs.writeFileSync(path.join(distPath, 'lodash.compiler.js.gz'), results, 'binary');
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});
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});
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/**
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* Compresses a `source` string using the Unix `gzip` commands. Yields the
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* result, and any exceptions encountered, to a `callback` function.
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*
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* @private
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* @param {String} source The JavaScript source to gzip.
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* @param {Function} callback The function called when gzipping is complete.
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*/
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function gzip(source, callback) {
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var compressor = spawn('gzip', ['-9f', '-c']),
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stderr = '',
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stdout = '';
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/* Compress and `gzip` Lo-Dash using UglifyJS. */
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uglify(source, function (results) {
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var source = postprocess(results);
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fs.writeFileSync(path.join(distPath, 'lodash.uglify.js'), source);
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gzip(source, function (exception, results) {
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if (exception) {
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throw exception;
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}
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fs.writeFileSync(path.join(distPath, 'lodash.uglify.js.gz'), results, 'binary');
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});
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});
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compressor.stdout.setEncoding('binary');
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compressor.stderr.setEncoding('utf8');
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/* Compresses a `source` string using UglifyJS. Yields the result to a
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compressor.stdout.on('data', function(data) {
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stdout += data;
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});
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compressor.stderr.on('data', function(data) {
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stderr += data;
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});
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compressor.on('exit', function(status) {
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var exception = null;
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if (status) {
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exception = new Error(stderr);
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exception.status = status;
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}
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callback(exception, stdout);
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});
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// proxy the source string to the `gzip` executable
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compressor.stdin.end(source);
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}
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/**
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* Compresses a `source` string using UglifyJS. Yields the result to a
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* `callback` function. This function is synchronous; the `callback` is used
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* for symmetry.
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*/
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*
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* @private
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* @param {String} source The JavaScript source to minify.
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* @param {Function} callback The function called when minifying is complete.
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*/
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function uglify(source, callback) {
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var results = uglifyJS.uglify.gen_code(
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// Enable unsafe transformations.
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uglifyJS.uglify.ast_squeeze_more(
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uglifyJS.uglify.ast_squeeze(
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// Munge variable and function names, excluding the special `define`
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// function exposed by asynchronous module loaders.
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uglifyJS.uglify.ast_mangle(uglifyJS.parser.parse(source), {
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var ugly = uglifyJS.uglify;
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var result = ugly.gen_code(
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// enable unsafe transformations.
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ugly.ast_squeeze_more(
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ugly.ast_squeeze(
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// munge variable and function names, excluding the special `define`
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// function exposed by AMD loaders.
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ugly.ast_mangle(uglifyJS.parser.parse(source), {
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'except': ['define']
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}
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))), {
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'ascii_only': true
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});
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callback(uglifyJS.uglify.split_lines(results, 500));
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// split lines at 500 characters to be consistent with Closure Compiler
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callback(ugly.split_lines(result, 500));
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}
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/* Compresses a `source` string using the Closure Compiler. Yields the
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* minified result to a `callback` function.
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*/
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function compile(source, callback) {
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var compiler = spawn('java', [
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// Load the Closure Compiler and set the compression options.
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'-jar', path.join(__dirname, 'vendor', 'closure-compiler', 'compiler.jar'),
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'--compilation_level=ADVANCED_OPTIMIZATIONS',
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'--language_in=ECMASCRIPT5_STRICT',
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'--warning_level=QUIET'
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]), stdout = '', stderr = '';
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// Explicitly set the encoding of the output and error streams.
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compiler.stdout.setEncoding('utf8');
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compiler.stderr.setEncoding('utf8');
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compiler.stdout.on('data', function (data) {
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stdout += data;
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});
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compiler.stderr.on('data', function (data) {
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stderr += data;
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});
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compiler.on('exit', function (status) {
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var exception = null;
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if (status) {
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exception = new Error(stderr);
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exception.status = status;
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}
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callback(exception, stdout);
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});
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compiler.stdin.end(source);
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/*--------------------------------------------------------------------------*/
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// create the destination directory if it doesn't exist
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if (!path.existsSync(distPath)) {
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fs.mkdirSync(distPath);
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}
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/* Compresses a `source` string using the Unix `gzip` commands. Yields the
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* result, and any exceptions encountered, to a `callback` function.
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*/
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function gzip(source, callback) {
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var compressor = spawn('gzip', ['-9f', '-c']), stdout = '', stderr = '';
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compressor.stdout.setEncoding('binary');
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compressor.stderr.setEncoding('utf8');
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compressor.stdout.on('data', function (data) {
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stdout += data;
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});
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compressor.stderr.on('data', function (data) {
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stderr += data;
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});
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compressor.on('exit', function (status) {
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var exception = null;
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if (status) {
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exception = new Error(stderr);
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exception.status = status;
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// compress and `gzip` Lo-Dash using the Closure Compiler
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compile(source, function(exception, result) {
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if (exception) {
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throw exception;
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}
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// post-process the minified source
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var source = postprocess(result);
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// save the final minified version
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fs.writeFileSync(path.join(distPath, 'lodash.compiler.js'), source);
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// save the `gzip`-ed version
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gzip(source, function(exception, result) {
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if (exception) {
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throw exception;
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}
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callback(exception, stdout);
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// explicit `binary` encoding is necessary to ensure that the stream is written correctly
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fs.writeFileSync(path.join(distPath, 'lodash.compiler.js.gz'), result, 'binary');
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});
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// Proxy the source string to the `gzip` executable.
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compressor.stdin.end(source);
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}
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}());
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});
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// compress and `gzip` Lo-Dash using UglifyJS
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uglify(source, function(result) {
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var source = postprocess(result);
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fs.writeFileSync(path.join(distPath, 'lodash.uglify.js'), source);
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gzip(source, function(exception, result) {
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if (exception) {
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throw exception;
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}
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fs.writeFileSync(path.join(distPath, 'lodash.uglify.js.gz'), result, 'binary');
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});
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});
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}());
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