#! /usr/bin/env node

var child_process = require('child_process');
var fs = require('fs');

var buildDir = process.env.BUILD_DIR || 'build';

if (!fs.existsSync(buildDir)){
    fs.mkdirSync(buildDir);
}

// Add `node_modules/.bin` to PATH
process.env.PATH = process.cwd() + '/node_modules/.bin:' + process.env.PATH;

console.log('Building xterm.js into ' + buildDir);

// Build ES2015 modules into ES5 form, then concatenate them,
// then remove unused require calls and save in output file with source map.
console.log('  - Building ' + buildDir + '/xterm.js...');

var jsBuildCmd = 'browserify src/xterm.js -s Terminal -t [ babelify --presets [ es2015 ] ] --debug | ';
jsBuildCmd += 'derequire | exorcist ' + buildDir + '/xterm.js.map > ' + buildDir + '/xterm.js';

var jsBuildProcess = child_process.execSync(jsBuildCmd);

if (jsBuildProcess.status) {
  console.log(jsBuildProcess.error);
}

console.log('    OK.');

// Copy CSS into $BUILD_DIR
console.log('  - Building ' + buildDir + '/xterm.css...');

fs.createReadStream('src/xterm.css').pipe(
  fs.createWriteStream(buildDir + '/xterm.css')
);
console.log('    OK.');