mirror of
https://github.com/whoisclebs/lodash.git
synced 2026-02-01 07:47:49 +00:00
350 lines
9.2 KiB
JavaScript
350 lines
9.2 KiB
JavaScript
#!/usr/bin/env node
|
|
;(function() {
|
|
'use strict';
|
|
|
|
/** The Node filesystem module */
|
|
var fs = require('fs');
|
|
|
|
/** Used to minify variables embedded in compiled strings */
|
|
var compiledVars = [
|
|
'accumulator',
|
|
'args',
|
|
'arrayClass',
|
|
'callback',
|
|
'className',
|
|
'collection',
|
|
'compareAscending',
|
|
'ctor',
|
|
'funcClass',
|
|
'hasOwnProperty',
|
|
'identity',
|
|
'index',
|
|
'isFunc',
|
|
'iteratorBind',
|
|
'length',
|
|
'methodName',
|
|
'noaccum',
|
|
'object',
|
|
'objectTypes',
|
|
'prop',
|
|
'property',
|
|
'result',
|
|
'skipProto',
|
|
'slice',
|
|
'source',
|
|
'sourceIndex',
|
|
'stringClass',
|
|
'target',
|
|
'thisArg',
|
|
'toString',
|
|
'value'
|
|
];
|
|
|
|
/** Used to minify `compileIterator` option properties */
|
|
var iteratorOptions = [
|
|
'args',
|
|
'array',
|
|
'arrayBranch',
|
|
'beforeLoop',
|
|
'bottom',
|
|
'exit',
|
|
'firstArg',
|
|
'hasExp',
|
|
'hasDontEnumBug',
|
|
'inLoop',
|
|
'init',
|
|
'iteratedObject',
|
|
'loopExp',
|
|
'object',
|
|
'objectBranch',
|
|
'shadowed',
|
|
'top',
|
|
'useHas'
|
|
];
|
|
|
|
/** Used to minify variables and string values to a single character */
|
|
var minNames = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'.split('');
|
|
|
|
/** Used to protect the specified properties from getting minified */
|
|
var propWhitelist = [
|
|
'_',
|
|
'_chain',
|
|
'_wrapped',
|
|
'after',
|
|
'all',
|
|
'amd',
|
|
'any',
|
|
'bind',
|
|
'bindAll',
|
|
'chain',
|
|
'clearTimeout',
|
|
'clone',
|
|
'collect',
|
|
'compact',
|
|
'compose',
|
|
'contains',
|
|
'criteria',
|
|
'debounce',
|
|
'defaults',
|
|
'defer',
|
|
'delay',
|
|
'detect',
|
|
'difference',
|
|
'each',
|
|
'environment',
|
|
'escape',
|
|
'escape',
|
|
'evaluate',
|
|
'every',
|
|
'extend',
|
|
'filter',
|
|
'find',
|
|
'first',
|
|
'flatten',
|
|
'foldl',
|
|
'foldr',
|
|
'forEach',
|
|
'forIn',
|
|
'forOwn',
|
|
'functions',
|
|
'groupBy',
|
|
'has',
|
|
'head',
|
|
'identity',
|
|
'include',
|
|
'indexOf',
|
|
'initial',
|
|
'inject',
|
|
'interpolate',
|
|
'intersection',
|
|
'invoke',
|
|
'isArguments',
|
|
'isArray',
|
|
'isBoolean',
|
|
'isDate',
|
|
'isElement',
|
|
'isEmpty',
|
|
'isEqual',
|
|
'isEqual',
|
|
'isFinite',
|
|
'isFinite',
|
|
'isFunction',
|
|
'isNaN',
|
|
'isNull',
|
|
'isNumber',
|
|
'isObject',
|
|
'isRegExp',
|
|
'isString',
|
|
'isUndefined',
|
|
'keys',
|
|
'last',
|
|
'lastIndexOf',
|
|
'map',
|
|
'max',
|
|
'memoize',
|
|
'methods',
|
|
'min',
|
|
'mixin',
|
|
'noConflict',
|
|
'once',
|
|
'opera',
|
|
'partial',
|
|
'pick',
|
|
'pluck',
|
|
'range',
|
|
'reduce',
|
|
'reduceRight',
|
|
'reject',
|
|
'rest',
|
|
'result',
|
|
'select',
|
|
'setTimeout',
|
|
'shuffle',
|
|
'size',
|
|
'some',
|
|
'sortBy',
|
|
'sortedIndex',
|
|
'source',
|
|
'tail',
|
|
'take',
|
|
'tap',
|
|
'template',
|
|
'templateSettings',
|
|
'throttle',
|
|
'times',
|
|
'toArray',
|
|
'union',
|
|
'uniq',
|
|
'unique',
|
|
'uniqueId',
|
|
'value',
|
|
'values',
|
|
'variable',
|
|
'VERSION',
|
|
'without',
|
|
'wrap',
|
|
'zip',
|
|
'zipObject'
|
|
];
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Pre-process a given JavaScript `source`, preparing it for minification.
|
|
*
|
|
* @param {String} source The source to process.
|
|
* @returns {String} Returns the processed source.
|
|
*/
|
|
function preprocess(source) {
|
|
// remove copyright to add later in post-compile.js
|
|
source = source.replace(/\/\*![\s\S]+?\*\//, '');
|
|
|
|
// remove unrecognized JSDoc tags so Closure Compiler won't complain
|
|
source = source.replace(/@(?:alias|category)\b.*/g, '');
|
|
|
|
// add brackets to whitelisted properties so Closure Compiler won't mung them
|
|
// http://code.google.com/closure/compiler/docs/api-tutorial3.html#export
|
|
source = source.replace(RegExp('\\.(' + propWhitelist.join('|') + ')\\b', 'g'), "['$1']");
|
|
|
|
// remove brackets from `_.escape()` in `tokenizeEscape`
|
|
source = source.replace(/_\['escape']\("/, '_.escape("');
|
|
|
|
// remove brackets from `_.escape()` in `_.template`
|
|
source = source.replace(/__e *= *_\['escape']/, '__e=_.escape');
|
|
|
|
// remove brackets from `result[length].value` in `_.sortBy`
|
|
source = source.replace("result[length]['value']", 'result[length].value');
|
|
|
|
// remove whitespace from string literals
|
|
source = source.replace(/'(?:(?=(\\?))\1.)*?'/g, function(string) {
|
|
// avoids removing the '\n' of the `stringEscapes` object
|
|
return string.replace(/\[object |else if|function | in |return\s+[\w']|throw |typeof |use strict|var |@ |'\\n'|\\\\n|\\n|\s+/g, function(match) {
|
|
return match == false || match == '\\n' ? '' : match;
|
|
});
|
|
});
|
|
|
|
// remove whitespace from `_.template` related regexpes
|
|
source = source.replace(/(?:reEmptyString\w+|reInsertVariable) *=.+/g, function(match) {
|
|
return match.replace(/ /g, '');
|
|
});
|
|
|
|
// remove newline from double-quoted string in `_.template`
|
|
source = source.replace('"\';\\n"', '"\';"');
|
|
|
|
// remove `useSourceURL` variable
|
|
source = source.replace(/(?:\n +\/\*[^*]*\*+(?:[^\/][^*]*\*+)*\/)?\n *try *\{(?:\s*\/\/.*\n)* *var useSourceURL[\s\S]+?catch[^}]+}\n/, '');
|
|
|
|
// remove debug sourceURL use in `_.template`
|
|
source = source.replace(/(?:\s*\/\/.*\n)* *if *\(useSourceURL[^}]+}/, '');
|
|
|
|
// minify internal properties used by `_.sortBy`
|
|
(function() {
|
|
var properties = ['criteria', 'value'],
|
|
snippets = source.match(/( +)(?:function compareAscending|var sortBy)\b[\s\S]+?\n\1}/g);
|
|
|
|
if (!snippets) {
|
|
return;
|
|
}
|
|
snippets.forEach(function(snippet) {
|
|
var result = snippet;
|
|
|
|
// minify properties
|
|
properties.forEach(function(property, index) {
|
|
result = result.replace(RegExp('\\b' + property + '\\b', 'g'), minNames[index]);
|
|
});
|
|
// replace with modified snippet
|
|
source = source.replace(snippet, result);
|
|
});
|
|
}());
|
|
|
|
// minify all compilable snippets
|
|
var snippets = source.match(
|
|
RegExp([
|
|
// match the `iteratorTemplate`
|
|
'( +)var iteratorTemplate\\b[\\s\\S]+?\\n\\1}',
|
|
// match methods created by `createIterator` calls
|
|
'createIterator\\((?:{|[a-zA-Z]+)[\\s\\S]+?\\);\\n',
|
|
// match variables storing `createIterator` options
|
|
'( +)var [a-zA-Z]+IteratorOptions\\b[\\s\\S]+?\\n\\2}',
|
|
// match the the `createIterator` function
|
|
'( +)function createIterator\\b[\\s\\S]+?\\n\\3}'
|
|
].join('|'), 'g')
|
|
);
|
|
|
|
// exit early if no compilable snippets
|
|
if (!snippets) {
|
|
return source;
|
|
}
|
|
|
|
snippets.forEach(function(snippet, index) {
|
|
var isCreateIterator = /function createIterator\b/.test(snippet),
|
|
isIteratorTemplate = /var iteratorTemplate\b/.test(snippet),
|
|
result = snippet;
|
|
|
|
// add brackets to whitelisted properties so Closure Compiler won't mung them
|
|
result = result.replace(RegExp('\\.(' + iteratorOptions.join('|') + ')\\b', 'g'), "['$1']");
|
|
|
|
if (isCreateIterator) {
|
|
// replace with modified snippet early and clip snippet so other arguments
|
|
// aren't minified
|
|
source = source.replace(snippet, result);
|
|
snippet = result = result.replace(/factory\([\s\S]+$/, '');
|
|
}
|
|
|
|
// minify snippet variables / arguments
|
|
compiledVars.forEach(function(variable, index) {
|
|
// ensure properties in compiled strings aren't minified
|
|
result = result.replace(RegExp('([^.]\\b)' + variable + '\\b(?!\' *[\\]:])', 'g'), '$1' + minNames[index]);
|
|
|
|
// correct `typeof x == 'object'`
|
|
if (variable == 'object') {
|
|
result = result.replace(RegExp("(typeof [^']+')" + minNames[index] + "'", 'g'), "$1object'");
|
|
}
|
|
});
|
|
|
|
// minify `createIterator` option property names
|
|
iteratorOptions.forEach(function(property, index) {
|
|
if (isIteratorTemplate) {
|
|
// minify property names as interpolated template variables
|
|
result = result.replace(RegExp('\\b' + property + '\\b', 'g'), minNames[index]);
|
|
}
|
|
else {
|
|
if (property == 'array' || property == 'object') {
|
|
// minify "array" and "object" sub property names
|
|
result = result.replace(RegExp("'" + property + "'( *[\\]:])", 'g'), "'" + minNames[index] + "'$1");
|
|
}
|
|
else {
|
|
// minify property name strings
|
|
result = result.replace(RegExp("'" + property + "'", 'g'), "'" + minNames[index] + "'");
|
|
// minify property names in regexps and accessors
|
|
if (isCreateIterator) {
|
|
result = result.replace(RegExp('([\\.|/])' + property + '\\b' , 'g'), '$1' + minNames[index]);
|
|
}
|
|
}
|
|
}
|
|
});
|
|
|
|
// replace with modified snippet
|
|
source = source.replace(snippet, result);
|
|
});
|
|
|
|
return source;
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
// expose `preprocess`
|
|
if (module != require.main) {
|
|
module.exports = preprocess;
|
|
}
|
|
else {
|
|
// read the JavaScript source file from the first argument if the script
|
|
// was invoked directly (e.g. `node pre-compile.js source.js`) and write to
|
|
// the same file
|
|
(function() {
|
|
var source = fs.readFileSync(process.argv[2], 'utf8');
|
|
fs.writeFileSync(process.argv[2], preprocess(source), 'utf8');
|
|
}());
|
|
}
|
|
}());
|