build/optimize.js

/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License.  You may obtain a copy of the License at
*
*   http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied.  See the License for the
* specific language governing permissions and limitations
* under the License.
*/

var UglifyJS = require('uglify-js');
var fs = require('fs');
var etpl = require('etpl');
var argv = require('optimist').argv;

etpl.config({
    commandOpen: '/**',
    commandClose: '*/'
});

var mode = argv.m || 'all';
var configPath = mode === 'all' ? 'config/echarts.js' : 'config/echarts.' + mode + '.js';
var outPath = mode === 'all' ? '../dist/echarts.js' : '../dist/echarts.' + mode + '.js';

var config = eval('(' + fs.readFileSync(configPath, 'utf-8') + ')');
var mainCode = fs.readFileSync(outPath, 'utf-8');
var startCode = fs.readFileSync('wrap/start.js', 'utf-8');
var nutCode = fs.readFileSync('wrap/nut.js', 'utf-8');
var endCode = fs.readFileSync('wrap/end.js', 'utf-8');

endCode = etpl.compile(endCode)({
    parts: config.include
});

// FIXME
var sourceCode = [startCode, nutCode, require('./mangleString')(mainCode), endCode].join('\n');

var ast = UglifyJS.parse(sourceCode);
/* jshint camelcase: false */
// compressor needs figure_out_scope too
ast.figure_out_scope();
ast = ast.transform(UglifyJS.Compressor( {} ));

// need to figure out scope again so mangler works optimally
ast.figure_out_scope();
ast.compute_char_frequency();
ast.mangle_names();

fs.writeFileSync(outPath, [startCode, nutCode, mainCode, endCode].join('\n'), 'utf-8');
fs.writeFileSync(outPath.replace('.js', '.min.js'), ast.print_to_string(), 'utf-8');