79 lines
2.2 KiB
JavaScript
Executable File
79 lines
2.2 KiB
JavaScript
Executable File
#!/usr/bin/env node
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// Attention: This file will be distributed with our npm packages!
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var gulp = require('gulp');
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var traceur = require('gulp-traceur');
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var rename = require('gulp-rename');
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var sourcemaps = require('gulp-sourcemaps');
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var through2 = require('through2');
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var fs = require('fs');
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var path = require('path');
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module.exports = run;
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if (!module.parent) {
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var argv = require('yargs')
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.usage('Transpile to es5.\n\n'+
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'Usage: $0 -m [format] -s [folder] -d [folder]')
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.example('$0 -d tmp', 'transpile in `instantate` format to tmp/')
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.options({
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's': {
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alias: 'source',
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describe: 'source folder',
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default: '.'
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},
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'd': {
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alias: 'dest',
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describe: 'output folder',
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demand: true
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},
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'm': {
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alias: 'modules',
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describe: 'module format, https://github.com/google/traceur-compiler/wiki/Options-for-Compiling',
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default: 'instantiate'
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}
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})
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.help('help')
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.wrap(40)
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.strict()
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.argv
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;
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run({
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src: argv.s,
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dest: argv.d,
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modules: argv.m
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});
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}
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function run(config) {
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var src = ['!node_modules', '!node_modules/**', './**/*.es6'];
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return gulp.src(src, {cwd: config.src})
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.pipe(rename(function(file) {
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file.extname = file.extname.replace('.es6', '.js');
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}))
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// TODO(tbosch): Using sourcemaps.init({loadMaps:true}) does not combine
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// the sourcemaps correctly!
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.pipe(sourcemaps.init())
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.pipe(through2.obj(function(file, encoding, done) {
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var self = this;
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fs.readFile(file.path.replace('.js', '.map'), function(error, buffer) {
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if (error) {
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return done(error);
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}
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file.sourceMap = JSON.parse(buffer.toString());
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// The filename needs to be the same as the one that is transpiled
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// so that gulp-sourcemaps can update the mapping
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file.sourceMap.file = file.relative;
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file.sourceMap.sourceRoot = path.dirname(file.relative);
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self.push(file);
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done();
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});
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}))
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.pipe(traceur({
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modules: config.modules,
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sourceMaps: true
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}))
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.pipe(sourcemaps.write('.'))
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.pipe(gulp.dest(config.dest));
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};
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