+const browserify = require('browserify');
+const buffer = require('vinyl-buffer');
+const fs = require('fs-extra');
+const gulp = require('gulp');
+const merge = require('merge-stream');
+const sorcery = require('sorcery');
+const source = require('vinyl-source-stream');
+const sourcemaps = require('gulp-sourcemaps');
+const ts = require('gulp-typescript');
+const tsify = require('tsify');
+
+
+let buildDir = process.env.BUILD_DIR || 'build';
+
+
+/**
+ * Compile TypeScript sources to JavaScript files and create a source map file for each TypeScript
+ * file compiled.
+ */
+gulp.task('tsc', function () {
+ // Remove the lib/ directory to prevent confusion if files were deleted in src/
+ fs.emptyDirSync('lib');
+
+ // Build all TypeScript files (including tests) to lib/, based on the configuration defined in
+ // `tsconfig.json`.
+ let tsProject = ts.createProject('tsconfig.json');
+ let tsResult = tsProject.src().pipe(sourcemaps.init()).pipe(tsProject());
+ let tsc = tsResult.js.pipe(sourcemaps.write('.', {includeContent: false, sourceRoot: ''})).pipe(gulp.dest('lib'));
+
+ // Copy all addons from src/ to lib/
+ let copyAddons = gulp.src('src/addons/**/*').pipe(gulp.dest('lib/addons'));
+
+ // Copy stylesheets from src/ to lib/
+ let copyStylesheets = gulp.src('src/**/*.css').pipe(gulp.dest('lib'));
+
+ return merge(tsc, copyAddons, copyStylesheets);
+});
+
+/**
+ * Bundle JavaScript files produced by the `tsc` task, into a single file named `xterm.js` with
+ * Browserify.
+ */
+gulp.task('browserify', ['tsc'], function() {
+ // Ensure that the build directory exists
+ fs.ensureDirSync(buildDir);
+
+ let browserifyOptions = {
+ basedir: buildDir,
+ debug: true,
+ entries: ['../lib/xterm.js'],
+ standalone: 'Terminal',
+ cache: {},
+ packageCache: {}
+ };
+ let bundleStream = browserify(browserifyOptions)
+ .plugin(tsify)
+ .bundle()
+ .pipe(source('xterm.js'))
+ .pipe(buffer())
+ .pipe(sourcemaps.init({loadMaps: true, sourceRoot: '..'}))
+ .pipe(sourcemaps.write('./'))
+ .pipe(gulp.dest(buildDir));
+
+ // Copy all add-ons from lib/ to buildDir
+ let copyAddons = gulp.src('lib/addons/**/*').pipe(gulp.dest(`${buildDir}/addons`));
+
+ // Copy stylesheets from src/ to lib/
+ let copyStylesheets = gulp.src('lib/**/*.css').pipe(gulp.dest(buildDir));
+
+ return merge(bundleStream, copyAddons, copyStylesheets);
+});
+
+
+/**
+ * Use `sorcery` to resolve the source map chain and point back to the TypeScript files.
+ * (Without this task the source maps produced for the JavaScript bundle points into the
+ * compiled JavaScript files in lib/).
+ */
+gulp.task('sorcery', ['browserify'], function () {
+ var chain = sorcery.loadSync(`${buildDir}/xterm.js`);
+ var map = chain.apply();
+ chain.writeSync();
+});
+
+gulp.task('build', ['sorcery']);
+
+gulp.task('default', ['build']);