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build.js
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#!/usr/bin/env node
;(function() {
'use strict';
/** Load Node.js modules */
var vm = require('vm');
/** Load other modules */
var _ = require('./lodash.js'),
minify = require('./build/minify.js'),
util = require('./build/util.js');
/** Module shortcuts */
var fs = util.fs,
path = util.path;
/** The current working directory */
var cwd = process.cwd();
/** Used for array method references */
var arrayRef = [];
/** Shortcut used to push arrays of values to an array */
var push = arrayRef.push;
/** Used to detect the Node.js executable in command-line arguments */
var reNode = RegExp('(?:^|' + path.sepEscaped + ')node(?:\\.exe)?$');
/** Shortcut used to convert array-like objects to arrays */
var slice = arrayRef.slice;
/** Shortcut to the `stdout` object */
var stdout = process.stdout;
/** Used to associate aliases with their real names */
var aliasToRealMap = {
'all': 'every',
'any': 'some',
'collect': 'map',
'detect': 'find',
'drop': 'rest',
'each': 'forEach',
'extend': 'assign',
'foldl': 'reduce',
'foldr': 'reduceRight',
'head': 'first',
'include': 'contains',
'inject': 'reduce',
'methods': 'functions',
'object': 'zipObject',
'select': 'filter',
'tail': 'rest',
'take': 'first',
'unique': 'uniq'
};
/** Used to associate real names with their aliases */
var realToAliasMap = {
'assign': ['extend'],
'contains': ['include'],
'every': ['all'],
'filter': ['select'],
'find': ['detect'],
'first': ['head', 'take'],
'forEach': ['each'],
'functions': ['methods'],
'map': ['collect'],
'reduce': ['foldl', 'inject'],
'reduceRight': ['foldr'],
'rest': ['drop', 'tail'],
'some': ['any'],
'uniq': ['unique'],
'zipObject': ['object']
};
/** Used to track function dependencies */
var dependencyMap = {
'after': [],
'assign': ['isArray', 'keys'],
'at': ['isString'],
'bind': ['isFunction', 'isObject'],
'bindAll': ['bind', 'functions'],
'bindKey': ['isFunction', 'isObject'],
'clone': ['assign', 'forEach', 'forOwn', 'isArray', 'isObject'],
'cloneDeep': ['clone'],
'compact': [],
'compose': [],
'contains': ['indexOf', 'isString'],
'countBy': ['createCallback', 'forEach'],
'createCallback': ['identity', 'isEqual', 'keys'],
'debounce': [],
'defaults': ['isArray', 'keys'],
'defer': ['bind'],
'delay': [],
'difference': ['indexOf'],
'escape': [],
'every': ['createCallback', 'isArray'],
'filter': ['createCallback', 'isArray'],
'find': ['createCallback', 'forEach', 'isArray'],
'findIndex': ['createCallback'],
'findKey': ['createCallback'],
'first': [],
'flatten': ['createCallback', 'isArray'],
'forEach': ['createCallback', 'isArguments', 'isArray', 'isString', 'keys'],
'forIn': ['createCallback', 'isArguments'],
'forOwn': ['createCallback', 'isArguments', 'keys'],
'functions': ['forIn', 'isFunction'],
'groupBy': ['createCallback', 'forEach'],
'has': [],
'identity': [],
'indexOf': ['sortedIndex'],
'initial': [],
'intersection': ['indexOf'],
'invert': ['keys'],
'invoke': ['forEach'],
'isArguments': [],
'isArray': [],
'isBoolean': [],
'isDate': [],
'isElement': [],
'isEmpty': ['forOwn', 'isArguments', 'isFunction'],
'isEqual': ['forIn', 'isArguments', 'isFunction'],
'isFinite': [],
'isFunction': [],
'isNaN': ['isNumber'],
'isNull': [],
'isNumber': [],
'isObject': [],
'isPlainObject': ['forIn', 'isArguments', 'isFunction'],
'isRegExp': [],
'isString': [],
'isUndefined': [],
'keys': ['forOwn', 'isArguments', 'isObject'],
'last': [],
'lastIndexOf': [],
'map': ['createCallback', 'isArray'],
'max': ['createCallback', 'isArray', 'isString'],
'memoize': [],
'merge': ['forEach', 'forOwn', 'isArray', 'isObject', 'isPlainObject'],
'min': ['createCallback', 'isArray', 'isString'],
'mixin': ['forEach', 'functions'],
'noConflict': [],
'omit': ['forIn', 'indexOf'],
'once': [],
'pairs': ['keys'],
'parseInt': ['isString'],
'partial': ['isFunction', 'isObject'],
'partialRight': ['isFunction', 'isObject'],
'pick': ['forIn', 'isObject'],
'pluck': ['map'],
'random': [],
'range': [],
'reduce': ['createCallback', 'isArray'],
'reduceRight': ['createCallback', 'forEach', 'isString', 'keys'],
'reject': ['createCallback', 'filter'],
'rest': [],
'result': ['isFunction'],
'runInContext': ['defaults', 'pick'],
'shuffle': ['forEach'],
'size': ['keys'],
'some': ['createCallback', 'isArray'],
'sortBy': ['createCallback', 'forEach'],
'sortedIndex': ['createCallback', 'identity'],
'tap': ['value'],
'template': ['defaults', 'escape', 'keys', 'values'],
'throttle': [],
'times': ['createCallback'],
'toArray': ['isString', 'values'],
'unescape': [],
'union': ['isArray', 'uniq'],
'uniq': ['createCallback', 'indexOf'],
'uniqueId': [],
'unzip': ['max', 'pluck'],
'value': ['forOwn', 'isArray'],
'values': ['keys'],
'where': ['filter'],
'without': ['difference'],
'wrap': [],
'zip': ['unzip'],
'zipObject': [],
// method used by the `backbone` and `underscore` builds
'chain': ['value'],
'findWhere': ['find']
};
/** Used to inline `iteratorTemplate` */
var iteratorOptions = [
'args',
'arrays',
'bottom',
'firstArg',
'init',
'loop',
'shadowedProps',
'top',
'useHas',
'useKeys'
];
/** List of all methods */
var allMethods = _.without(_.keys(dependencyMap));
/** List of Lo-Dash methods */
var lodashMethods = _.without(allMethods, 'chain', 'findWhere');
/** List of Backbone's Lo-Dash dependencies */
var backboneDependencies = [
'bind',
'bindAll',
'chain',
'clone',
'contains',
'countBy',
'defaults',
'escape',
'every',
'extend',
'filter',
'find',
'first',
'forEach',
'groupBy',
'has',
'indexOf',
'initial',
'invert',
'invoke',
'isArray',
'isEmpty',
'isEqual',
'isFunction',
'isObject',
'isRegExp',
'isString',
'keys',
'last',
'lastIndexOf',
'map',
'max',
'min',
'mixin',
'omit',
'once',
'pairs',
'pick',
'reduce',
'reduceRight',
'reject',
'rest',
'result',
'shuffle',
'size',
'some',
'sortBy',
'sortedIndex',
'toArray',
'uniqueId',
'value',
'values',
'without'
];
/** List of Lo-Dash only methods */
var lodashOnlyMethods = [
'at',
'bindKey',
'cloneDeep',
'createCallback',
'findIndex',
'findKey',
'forIn',
'forOwn',
'isPlainObject',
'merge',
'parseInt',
'partialRight',
'runInContext',
'unzip'
];
/** List of Underscore methods */
var underscoreMethods = _.without.apply(_, [allMethods].concat(lodashOnlyMethods));
/** List of ways to export the `lodash` function */
var exportsAll = [
'amd',
'commonjs',
'global',
'node'
];
/*--------------------------------------------------------------------------*/
/**
* Adds support for Underscore style chaining to the `source`.
*
* @private
* @param {String} source The source to process.
* @returns {String} Returns the modified source.
*/
function addChainMethods(source) {
// add `_.chain`
source = source.replace(matchFunction(source, 'tap'), function(match) {
var indent = getIndent(match);
return match && (indent + [
'',
'/**',
' * Creates a `lodash` object that wraps the given `value`.',
' *',
' * @static',
' * @memberOf _',
' * @category Chaining',
' * @param {Mixed} value The value to wrap.',
' * @returns {Object} Returns the wrapper object.',
' * @example',
' *',
' * var stooges = [',
" * { 'name': 'moe', 'age': 40 },",
" * { 'name': 'larry', 'age': 50 },",
" * { 'name': 'curly', 'age': 60 }",
' * ];',
' *',
' * var youngest = _.chain(stooges)',
' * .sortBy(function(stooge) { return stooge.age; })',
" * .map(function(stooge) { return stooge.name + ' is ' + stooge.age; })",
' * .first();',
" * // => 'moe is 40'",
' */',
'function chain(value) {',
' value = new lodashWrapper(value);',
' value.__chain__ = true;',
' return value;',
'}',
'',
match
].join('\n' + indent));
});
// add `wrapperChain`
source = source.replace(matchFunction(source, 'wrapperToString'), function(match) {
var indent = getIndent(match);
return match && (indent + [
'',
'/**',
' * Enables method chaining on the wrapper object.',
' *',
' * @name chain',
' * @memberOf _',
' * @category Chaining',
' * @returns {Mixed} Returns the wrapper object.',
' * @example',
' *',
' * var sum = _([1, 2, 3])',
' * .chain()',
' * .reduce(function(sum, num) { return sum + num; })',
' * .value()',
' * // => 6`',
' */',
'function wrapperChain() {',
' this.__chain__ = true;',
' return this;',
'}',
'',
match
].join('\n' + indent));
});
// add `lodash.chain` assignment
source = source.replace(getMethodAssignments(source), function(match) {
return match.replace(/^(?: *\/\*[^*]*\*+(?:[^\/][^*]*\*+)*\/\n)?( *)lodash\.VERSION *=/m, '$1lodash.chain = chain;\n\n$&');
});
// add `lodash.prototype.chain` assignment
source = source.replace(/^( *)lodash\.prototype\.value *=.+\n/m, '$1lodash.prototype.chain = wrapperChain;\n$&');
// remove `lodash.prototype.toString` and `lodash.prototype.valueOf` assignments
source = source.replace(/^ *lodash\.prototype\.(?:toString|valueOf) *=.+\n/gm, '');
// remove `lodash.prototype` batch method assignments
source = source.replace(/(?:\s*\/\/.*)*\n( *)forOwn\(lodash, *function\(func, *methodName\)[\s\S]+?\n\1}.+/g, '');
// replace `_.mixin`
source = replaceFunction(source, 'mixin', [
'function mixin(object) {',
' forEach(functions(object), function(methodName) {',
' var func = lodash[methodName] = object[methodName];',
'',
' lodash.prototype[methodName] = function() {',
' var args = [this.__wrapped__];',
' push.apply(args, arguments);',
'',
' var result = func.apply(lodash, args);',
' if (this.__chain__) {',
' result = new lodashWrapper(result);',
' result.__chain__ = true;',
' }',
' return result;',
' };',
' });',
'}'
].join('\n'));
// replace wrapper `Array` method assignments
source = source.replace(/^(?:(?: *\/\/.*\n)*(?: *if *\(.+\n)?( *)(each|forEach)\(\['[\s\S]+?\n\1}\);(?:\n *})?\n+)+/m, function(match, indent, funcName) {
return indent + [
'// add `Array` mutator functions to the wrapper',
funcName + "(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {",
' var func = arrayRef[methodName];',
' lodash.prototype[methodName] = function() {',
' var value = this.__wrapped__;',
' func.apply(value, arguments);',
'',
' // avoid array-like object bugs with `Array#shift` and `Array#splice`',
' // in Firefox < 10 and IE < 9',
' if (!support.spliceObjects && value.length === 0) {',
' delete value[0];',
' }',
' return this;',
' };',
'});',
'',
'// add `Array` accessor functions to the wrapper',
funcName + "(['concat', 'join', 'slice'], function(methodName) {",
' var func = arrayRef[methodName];',
' lodash.prototype[methodName] = function() {',
' var value = this.__wrapped__,',
' result = func.apply(value, arguments);',
'',
' if (this.__chain__) {',
' result = new lodashWrapper(result);',
' result.__chain__ = true;',
' }',
' return result;',
' };',
'});',
''
].join('\n' + indent);
});
// move `mixin(lodash)` to after the method assignments
source = source.replace(/(?:\s*\/\/.*)*\n( *)mixin\(lodash\).+/, '');
source = source.replace(getMethodAssignments(source), function(match) {
var indent = /^ *(?=lodash\.)/m.exec(match)[0];
return match + [
'',
'',
'// add functions to `lodash.prototype`',
'mixin(lodash);'
].join('\n' + indent);
});
return source;
}
/**
* Adds build `commands` to the copyright/license header of the `source`.
*
* @private
* @param {String} source The source to process.
* @param {Array} [commands=[]] An array of commands.
* @returns {String} Returns the modified source.
*/
function addCommandsToHeader(source, commands) {
return source.replace(/(\/\**\n)( \*)( *@license[\s*]+)( *Lo-Dash [\w.-]+)(.*)/, function() {
// remove `node path/to/build.js` from `commands`
if (reNode.test(commands[0])) {
commands.splice(0, 2);
}
// add quotes to commands with spaces or equals signs
commands = _.map(commands, function(command) {
var separator = (command.match(/[= ]/) || [''])[0];
if (separator) {
var pair = command.split(separator);
command = pair[0] + separator + '"' + pair[1] + '"';
}
// escape newlines, carriage returns, multi-line comment end tokens
command = command
.replace(/\n/g, '\\n')
.replace(/\r/g, '\\r')
.replace(/\*\//g, '*\\/');
return command;
});
// add build commands to copyright/license header
var parts = slice.call(arguments, 1);
return (
parts[0] +
parts[1] +
parts[2] + parts[3] + ' (Custom Build)' + parts[4] + '\n' +
parts[1] + ' Build: `lodash ' + commands.join(' ') + '`'
);
});
}
/**
* Compiles template files matched by the given file path `pattern` into a
* single source, extending `_.templates` with precompiled templates named after
* each template file's basename.
*
* @private
* @param {String} [pattern='<cwd>/*.jst'] The file path pattern.
* @param {Object} options The options object.
* @returns {String} Returns the compiled source.
*/
function buildTemplate(pattern, options) {
pattern || (pattern = path.join(cwd, '*.jst'));
var directory = path.dirname(pattern);
var source = [
';(function(window) {',
" var freeExports = typeof exports == 'object' && typeof require == 'function' && exports;",
'',
" var freeModule = typeof module == 'object' && module && module.exports == freeExports && module;",
'',
" var freeGlobal = typeof global == 'object' && global;",
' if (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal) {',
' window = freeGlobal;',
' }',
'',
' var templates = {},',
' _ = window._;',
''
];
// convert to a regexp
pattern = RegExp(
path.basename(pattern)
.replace(/[.+?^=!:${}()|[\]\/\\]/g, '\\$&')
.replace(/\*/g, '.*?') + '$'
);
fs.readdirSync(directory).forEach(function(filename) {
var filePath = path.join(directory, filename);
if (pattern.test(filename)) {
var text = fs.readFileSync(filePath, 'utf8'),
precompiled = getFunctionSource(_.template(text, null, options)),
prop = filename.replace(/\..*$/, '');
source.push(" templates['" + prop.replace(/['\n\r\t]/g, '\\$&') + "'] = " + precompiled + ';', '');
}
});
source.push(
" if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {",
" define(['" + options.moduleId + "'], function(lodash) {",
' _ = lodash;',
' lodash.templates = lodash.extend(lodash.templates || {}, templates);',
' });',
" } else if (freeExports && !freeExports.nodeType) {",
" _ = require('" + options.moduleId + "');",
" if (freeModule) {",
' (freeModule.exports = templates).templates = templates;',
' } else {',
' freeExports.templates = templates;',
' }',
' } else if (_) {',
' _.templates = _.extend(_.templates || {}, templates);',
' }',
'}(this));'
);
return source.join('\n');
}
/**
* Capitalizes a given string.
*
* @private
* @param {String} string The string to capitalize.
* @returns {String} Returns the capitalized string.
*/
function capitalize(string) {
return string[0].toUpperCase() + string.toLowerCase().slice(1);
}
/**
* Removes unnecessary comments, whitespace, and pseudo private properties.
*
* @private
* @param {String} source The source to process.
* @returns {String} Returns the modified source.
*/
function cleanupSource(source) {
return source
// remove pseudo private properties
.replace(/(?:(?:\s*\/\/.*)*\s*lodash\._[^=]+=.+\n)+/g, '\n')
// remove extraneous whitespace
.replace(/^ *\n/gm, '\n')
// remove lines with just whitespace and semicolons
.replace(/^ *;\n/gm, '')
// consolidate multiple newlines
.replace(/\n{3,}/g, '\n\n')
// consolidate consecutive horizontal rule comment separators
.replace(/(?:\s*\/\*-+\*\/\s*){2,}/g, function(separators) {
return separators.match(/^\s*/)[0] + separators.slice(separators.lastIndexOf('/*'));
});
}
/**
* Writes the help message to standard output.
*
* @private
*/
function displayHelp() {
console.log([
'',
' Commands:',
'',
' lodash backbone Build with only methods required by Backbone',
' lodash legacy Build tailored for older environments without ES5 support',
' lodash modern Build tailored for newer environments with ES5 support',
' lodash mobile Build without method compilation and most bug fixes for old browsers',
' lodash strict Build with `_.assign`, `_.bindAll`, & `_.defaults` in strict mode',
' lodash underscore Build tailored for projects already using Underscore',
' lodash include=... Comma separated method/category names to include in the build',
' lodash minus=... Comma separated method/category names to remove from those included in the build',
' lodash plus=... Comma separated method/category names to add to those included in the build',
' lodash category=... Comma separated categories of methods to include in the build (case-insensitive)',
' (i.e. “arrays”, “chaining”, “collections”, “functions”, “objects”, and “utilities”)',
' lodash exports=... Comma separated names of ways to export the `lodash` function',
' (i.e. “amd”, “commonjs”, “global”, “node”, and “none”)',
' lodash iife=... Code to replace the immediately-invoked function expression that wraps Lo-Dash',
' (e.g. `lodash iife="!function(window){%output%}(this)"`)',
'',
' lodash template=... File path pattern used to match template files to precompile',
' (e.g. `lodash template=./*.jst`)',
' lodash settings=... Template settings used when precompiling templates',
' (e.g. `lodash settings="{interpolate:/{{([\\s\\S]+?)}}/g}"`)',
' lodash moduleId=... The AMD module ID of Lo-Dash, which defaults to “lodash”, used by precompiled templates',
'',
' All arguments, except `legacy` with `mobile`, `modern`, or `underscore`, may be combined.',
' Unless specified by `-o` or `--output`, all files created are saved to the current working directory.',
'',
' Options:',
'',
' -c, --stdout Write output to standard output',
' -d, --debug Write only the non-minified development output',
' -h, --help Display help information',
' -m, --minify Write only the minified production output',
' -o, --output Write output to a given path/filename',
' -p, --source-map Generate a source map for the minified output, using an optional source map URL',
' -s, --silent Skip status updates normally logged to the console',
' -V, --version Output current version of Lo-Dash',
''
].join('\n'));
}
/**
* Gets the aliases associated with a given function name.
*
* @private
* @param {String} methodName The name of the method to get aliases for.
* @returns {Array} Returns an array of aliases.
*/
function getAliases(methodName) {
return realToAliasMap[methodName] || [];
}
/**
* Gets the category of the given method name.
*
* @private
* @param {String} source The source to inspect.
* @param {String} methodName The method name.
* @returns {String} Returns the method name's category.
*/
function getCategory(source, methodName) {
var result = /@category +(\w+)/.exec(matchFunction(source, methodName));
return result ? result[1] : '';
}
/**
* Gets an array of category dependencies for a given category.
*
* @private
* @param {String} source The source to inspect.
* @param {String} category The category.
* @returns {Array} Returns an array of cetegory dependants.
*/
function getCategoryDependencies(source, category) {
var methods = _.uniq(getMethodsByCategory(source, category).reduce(function(result, methodName) {
push.apply(result, getDependencies(methodName));
return result;
}, []));
var categories = _.uniq(methods.map(function(methodName) {
return getCategory(source, methodName);
}));
return categories.filter(function(other) {
return other != category;
});
}
/**
* Gets an array of depenants for a method by a given name.
*
* @private
* @param {String} methodName The method name.
* @returns {Array} Returns an array of method dependants.
*/
function getDependants(methodName) {
// iterate over the `dependencyMap`, adding the names of methods that
// have `methodName` as a dependency
return _.reduce(dependencyMap, function(result, dependencies, otherName) {
if (_.contains(dependencies, methodName)) {
result.push(otherName);
}
return result;
}, []);
}
/**
* Gets an array of dependencies for a given method name. If passed an array
* of dependencies it will return an array containing the given dependencies
* plus any additional detected sub-dependencies.
*
* @private
* @param {Array|String} methodName A single method name or array of
* dependencies to query.
* @param- {Object} [stackA=[]] Internally used track queried methods.
* @returns {Array} Returns an array of method dependencies.
*/
function getDependencies(methodName, stack) {
var dependencies = Array.isArray(methodName) ? methodName : dependencyMap[methodName];
if (!dependencies) {
return [];
}
stack || (stack = []);
// recursively accumulate the dependencies of the `methodName` function, and
// the dependencies of its dependencies, and so on
return _.uniq(dependencies.reduce(function(result, otherName) {
if (!_.contains(stack, otherName)) {
stack.push(otherName);
result.push.apply(result, getDependencies(otherName, stack).concat(otherName));
}
return result;
}, []));
}
/**
* Gets the formatted source of the given function.
*
* @private
* @param {Function} func The function to process.
* @param {String} indent The function indent.
* @returns {String} Returns the formatted source.
*/
function getFunctionSource(func, indent) {
var source = func.source || (func + '');
if (indent == null) {
indent = ' ';
}
// format leading whitespace
return source.replace(/\n(?:.*)/g, function(match, index) {
match = match.slice(1);
return (
'\n' + indent +
(match == '}' && !_.contains(source, '}', index + 2) ? '' : ' ')
) + match;
});
}
/**
* Gets the indent of the given function.
*
* @private
* @param {Function} func The function to process.
* @returns {String} Returns the indent.
*/
function getIndent(func) {
return /^ *(?=\S)/m.exec(func.source || func)[0];
}
/**
* Gets the `_.isArguments` fallback from `source`.
*
* @private
* @param {String} source The source to inspect.
* @returns {String} Returns the `isArguments` fallback.
*/
function getIsArgumentsFallback(source) {
return (source.match(/(?:\s*\/\/.*)*\n( *)if *\((?:!support\.argsClass|!isArguments)[\s\S]+?};\n\1}/) || [''])[0];
}
/**
* Gets the `_.isArray` fallback from `source`.
*
* @private
* @param {String} source The source to inspect.
* @returns {String} Returns the `isArray` fallback.
*/
function getIsArrayFallback(source) {
return matchFunction(source, 'isArray')
.replace(/^[\s\S]+?=\s*nativeIsArray\b/, '')
.replace(/[;\s]+$/, '');
}
/**
* Gets the `_.isFunction` fallback from `source`.
*
* @private
* @param {String} source The source to inspect.
* @returns {String} Returns the `isFunction` fallback.
*/
function getIsFunctionFallback(source) {
return (source.match(/(?:\s*\/\/.*)*\n( *)if *\(isFunction\(\/x\/[\s\S]+?};\n\1}/) || [''])[0];
}
/**
* Gets the `iteratorTemplate` from `source`.
*
* @private
* @param {String} source The source to inspect.
* @returns {String} Returns the `iteratorTemplate`.
*/
function getIteratorTemplate(source) {
return (source.match(/^( *)var iteratorTemplate *= *[\s\S]+?\n\1.+?;\n/m) || [''])[0];
}
/**
* Gets the Lo-Dash method assignments snippet from `source`.
*
* @private
* @param {String} source The source to inspect.
* @returns {String} Returns the method assignments snippet.
*/
function getMethodAssignments(source) {
return (source.match(/\/\*-+\*\/\n(?:\s*\/\/.*)*\s*lodash\.\w+ *=[\s\S]+?lodash\.VERSION *=.+/) || [''])[0];
}
/**
* Gets the names of methods in `source` belonging to the given `category`.
*
* @private
* @param {String} source The source to inspect.
* @param {String} category The category to filter by.
* @returns {Array} Returns a new array of method names belonging to the given category.
*/
function getMethodsByCategory(source, category) {
return allMethods.filter(function(methodName) {
return getCategory(source, methodName) == category;
});
}
/**
* Gets the real name, not alias, of a given method name.
*
* @private
* @param {String} methodName The name of the method to resolve.
* @returns {String} Returns the real method name.
*/
function getRealName(methodName) {
return aliasToRealMap[methodName] || methodName;
}
/**
* Determines if all functions of the given names have been removed from `source`.
*
* @private
* @param {String} source The source to inspect.
* @param {String} [funcName1, funcName2, ...] The names of functions to check.
* @returns {Boolean} Returns `true` if all functions have been removed, else `false`.
*/
function isRemoved(source) {
return slice.call(arguments, 1).every(function(funcName) {
return !(
matchFunction(source, funcName) ||
RegExp('^ *lodash\\.prototype\\.' + funcName + ' *=.+', 'm').test(source)
);
});
}
/**
* Searches `source` for a `funcName` function declaration, expression, or
* assignment and returns the matched snippet.
*
* @private
* @param {String} source The source to inspect.
* @param {String} funcName The name of the function to match.
* @returns {String} Returns the matched function snippet.
*/
function matchFunction(source, funcName) {
var result = source.match(RegExp(
// match multi-line comment block
'(?:\\n +/\\*[^*]*\\*+(?:[^/][^*]*\\*+)*/)?\\n' +
// begin non-capturing group
'( *)(?:' +
// match a function declaration
'function ' + funcName + '\\b[\\s\\S]+?\\n\\1}|' +
// match a variable declaration with function expression
'var ' + funcName + ' *=.*?function[\\s\\S]+?\\n\\1};' +
// end non-capturing group
')\\n'
));
// match variables that are explicitly defined as functions
result || (result = source.match(RegExp(
// match multi-line comment block
'(?:\\n +/\\*[^*]*\\*+(?:[^/][^*]*\\*+)*/)?\\n' +
// match simple variable declarations and those with `createIterator`
' *var ' + funcName + ' *=(?:.+?|.*?createIterator\\([\\s\\S]+?\\));\\n'
)));
return /@type +Function|function\s*\w*\(/.test(result) ? result[0] : '';
}
/**
* Converts a comma separated options string into an array.
*
* @private
* @param {String} value The option to convert.
* @returns {Array} Returns the new converted array.
*/
function optionToArray(value) {
return _.compact(_.isArray(value)
? value
: value.match(/\w+=(.*)$/)[1].split(/, */)
);
}
/**
* Converts a comma separated options string into an array containing
* only real method names.
*
* @private
* @param {String} source The source to inspect.
* @param {String} value The option to convert.
* @returns {Array} Returns the new converted array.
*/
function optionToMethodsArray(source, value) {
var methodNames = optionToArray(value);
// convert aliases to real method names
methodNames = methodNames.map(getRealName);
// remove nonexistent and duplicate method names
return _.uniq(_.intersection(allMethods, methodNames));
}
/**
* Removes the all references to `varName` from `createIterator` in `source`.
*
* @private
* @param {String} source The source to process.
* @param {String} identifier The name of the variable or property to remove.
* @returns {String} Returns the modified source.
*/
function removeFromCreateIterator(source, identifier) {
var snippet = matchFunction(source, 'createIterator');
if (!snippet) {
return source;
}
// remove data object property assignment
var modified = snippet
.replace(RegExp("^(?: *\\/\\/.*\\n)* *'" + identifier + "':.+\\n+", 'm'), '')
.replace(/,(?=\s*})/, '');
source = source.replace(snippet, function() {
return modified;
});
// clip at the `factory` assignment
snippet = modified.match(/Function\([\s\S]+$/)[0];
modified = snippet
.replace(RegExp('\\b' + identifier + '\\b,? *', 'g'), '')
.replace(/, *(?=',)/, '')
.replace(/,(?=\s*\))/, '')
source = source.replace(snippet, function() {
return modified;
});
return source;
}
/**
* Removes the `funcName` function declaration, expression, or assignment and
* associated code from `source`.
*
* @private
* @param {String} source The source to process.
* @param {String} funcName The name of the function to remove.
* @returns {String} Returns the modified source.
*/
function removeFunction(source, funcName) {
var snippet;
// remove function
if (funcName == 'runInContext') {
source = removeRunInContext(source, funcName);
} else if (funcName != 'each' && (snippet = matchFunction(source, funcName))) {
source = source.replace(snippet, '');
}
// grab the method assignments snippet
snippet = getMethodAssignments(source);