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const PLATFORM_MACROS = ['CC_EDITOR', 'CC_PREVIEW', 'CC_BUILD', 'CC_TEST'];
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const FLAGS = ['jsb', 'runtime', 'wechatgame', 'wechatgameSub','baidugame', 'qqplay', 'debug', 'nativeRenderer', 'qqgame'];
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// generate macros for uglify's global_defs
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// available platforms: 'editor' | 'preview' | 'build' | 'test'
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// available keys of flags: 'jsb' | 'runtime' | 'wechatgame' | 'qqplay' | 'debug' | 'nativeRenderer'
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exports.getMacros = function (platform, flags) {
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// platform macros
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var platformMacro = 'CC_' + platform.toUpperCase();
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if (PLATFORM_MACROS.indexOf(platformMacro) === -1) {
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throw new Error('Unknown platform: ' + platform);
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}
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var res = {};
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for (let i = 0; i < PLATFORM_MACROS.length; i++) {
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let macro = PLATFORM_MACROS[i];
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res[macro] = (macro === platformMacro);
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}
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// flag macros
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if (flags) {
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for (let flag in flags) {
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if (flags.hasOwnProperty(flag) && flags[flag]) {
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if (FLAGS.indexOf(flag) === -1) {
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throw new Error('Unknown flag: ' + flag);
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}
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}
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}
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}
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for (let i = 0; i < FLAGS.length; i++) {
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let flag = FLAGS[i];
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let macro = 'CC_' + flag.toUpperCase();
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res[macro] = !!(flags && flags[flag]);
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}
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// debug macros
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res['CC_DEV'] = res['CC_EDITOR'] || res['CC_PREVIEW'] || res['CC_TEST'];
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res['CC_DEBUG'] = res['CC_DEBUG'] || res['CC_DEV'];
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res['CC_SUPPORT_JIT'] = !(res['CC_BAIDUGAME'] || res['CC_WECHATGAME'] || res['CC_QQPLAY'] || res['CC_RUNTIME']);
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return res;
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};
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// see https://github.com/mishoo/UglifyJS2/tree/harmony#compress-options
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exports.getUglifyOptions = function (platform, flags) {
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var global_defs = exports.getMacros(platform, flags);
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var releaseMode = !global_defs['CC_DEBUG'];
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var optimizeForJSC = releaseMode && global_defs['CC_JSB'];
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if (optimizeForJSC) {
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return {
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parse: {
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bare_returns: true
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},
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toplevel: false,
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compress: {
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global_defs: global_defs,
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negate_iife: false,
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sequences: false,
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keep_infinity: true, // reduce jsc file size
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typeofs: false,
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inline: 1, // workaround mishoo/UglifyJS2#2842
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},
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output: {
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beautify: true, // really preserve_lines
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indent_level: 0, // reduce jsc file size
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}
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};
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}
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if (releaseMode) {
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return {
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parse: {
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bare_returns: true
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},
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toplevel: false,
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compress: {
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global_defs: global_defs,
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negate_iife: false,
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inline: 1, // workaround mishoo/UglifyJS2#2842
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},
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output: {
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ascii_only: true,
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}
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};
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}
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else {
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return {
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parse: {
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bare_returns: true
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},
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toplevel: false,
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compress: {
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global_defs: global_defs,
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negate_iife: false,
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sequences: false, // join consecutive statements with the “comma operator”
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properties: false, // optimize property access: a["foo"] → a.foo
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// dead_code: true, // discard unreachable code
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drop_debugger: false, // discard “debugger” statements
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// ecma: 5, // transform ES5 code into smaller ES6+ equivalent forms
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// evaluate: true, // evaluate constant expressions
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unsafe: false, // some unsafe optimizations (see below)
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// computed_props: true,
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// conditionals: false, // optimize if-s and conditional expressions
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comparisons: false, // optimize comparisons
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booleans: false, // optimize boolean expressions
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typeofs: false, // Transforms typeof foo == "undefined" into foo === void 0. Note: recommend to set this value to false for IE10 and earlier versions due to known issues.
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loops: false, // optimize loops
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unused: false, // drop unused variables/functions
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hoist_funs: false, // hoist function declarations
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hoist_props: false,
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hoist_vars: false, // hoist variable declarations
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if_return: false, // optimize if-s followed by return/continue
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inline: false, // embed simple functions
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join_vars: false, // join var declarations
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collapse_vars: false, // Collapse single-use non-constant variables - side effects permitting.
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reduce_funcs: false,
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reduce_vars: false, // Improve optimization on variables assigned with and used as constant values.
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//warnings: true,
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pure_getters: false,
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pure_funcs: null,
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drop_console: false,
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// expression: false, // Pass true to preserve completion values from terminal statements without return, e.g. in bookmarklets.
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keep_fargs: true,
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keep_fnames: true,
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keep_infinity: true, // Pass true to prevent Infinity from being compressed into 1/0, which may cause performance issues on Chrome.
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side_effects: false, // drop side-effect-free statements
|
},
|
mangle: false,
|
//preserveComments: 'all',
|
output: {
|
// http://lisperator.net/uglifyjs/codegen
|
beautify: true,
|
indent_level: 2,
|
ascii_only: true,
|
},
|
};
|
}
|
};
|
|
exports.uglify = function (platform, isJSB, isDebugBuild) {
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const Composer = require('gulp-uglify/composer');
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const Uglify = require('uglify-es');
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const minify = Composer(Uglify);
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return minify(exports.getUglifyOptions(platform, isJSB, isDebugBuild));
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};
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