/
file_list.js
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/
file_list.js
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/*
* Jake JavaScript build tool
* Copyright 2112 Matthew Eernisse (mde@fleegix.org)
*
* Licensed 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 fs = require('fs')
, path = require('path')
, minimatch // Lazy-required
, glob = {};
glob.globSync = function (pat) {
var dirname = path.dirname(pat)
, files = fs.readdirSync(dirname)
, filePat = path.basename(pat)
, matches;
matches = minimatch.match(files, filePat, {'null': true});
if (matches && matches.length) {
for (var i = 0, ii = matches.length; i < ii; i++) {
matches[i] = dirname + '/' + matches[i];
}
}
return matches
};
// Constants
// ---------------
// List of all the builtin Array methods we want to override
var ARRAY_METHODS = Object.getOwnPropertyNames(Array.prototype)
// Array methods that return a copy instead of affecting the original
, SPECIAL_RETURN = {
'concat': true
, 'slice': true
, 'filter': true
, 'map': true
}
// Default file-patterns we want to ignore
, DEFAULT_IGNORE_PATTERNS = [
/(^|[\/\\])CVS([\/\\]|$)/
, /(^|[\/\\])\.svn([\/\\]|$)/
, /(^|[\/\\])\.git([\/\\]|$)/
, /\.bak$/
, /~$/
]
// Ignore core files
, DEFAULT_IGNORE_FUNCS = [
function (name) {
var isDir = false
, stats;
try {
stats = fs.statSync(name);
isDir = stats.isDirectory();
}
catch(e) {}
return (/(^|[\/\\])core$/).test(name) && !isDir;
}
];
// Utility methods
// ---------------
// Escapes special characters in a string to be used in generating
// a regex
var regexpEscape = (function() {
var specials = [ '/', '.', '*', '+', '?', '|', '(', ')', '[', ']', '{', '}', '\\' ]
, sRE = new RegExp('(\\' + specials.join('|\\') + ')', 'g');
return function (text) { return text.replace(sRE, '\\$1'); };
})();
var FileList = function () {
var self = this
, wrap;
// Lazy-require minimatch so that require of this file in cli.js won't bomb
if (!minimatch) {
try {
minimatch = require('minimatch');
}
catch(e) {
fail('FileList requires minimatch ' +
'(https://github.com/isaacs/minimatch). Try `npm install -g minimatch`.');
}
}
// List of glob-patterns or specific filenames
this.pendingAdd = [];
// Switched to false after lazy-eval of files
this.pending = true;
// Used to calculate exclusions from the list of files
this.excludes = {
pats: DEFAULT_IGNORE_PATTERNS.slice()
, funcs: DEFAULT_IGNORE_FUNCS.slice()
, regex: null
};
this.items = [];
// Wrap the array methods with the delegates
wrap = function (prop) {
var arr;
self[prop] = function () {
if (self.pending) {
self.resolve();
}
if (typeof self.items[prop] == 'function') {
// Special method that return a copy
if (SPECIAL_RETURN[prop]) {
arr = self.items[prop].apply(self.items, arguments);
return FileList.clone(self, arr);
}
else {
return self.items[prop].apply(self.items, arguments);
}
}
else {
return self.items[prop];
}
};
};
for (var i = 0, ii = ARRAY_METHODS.length; i < ii; i++) {
wrap(ARRAY_METHODS[i]);
}
// Include whatever files got passed to the constructor
this.include.apply(this, arguments);
// Fix constructor linkage
this.constructor = FileList;
};
FileList.prototype = new (function () {
var globPattern = /[*?\[\{]/;
var _addMatching = function (pat) {
var matches = glob.globSync(pat);
this.items = this.items.concat(matches);
}
, _resolveAdd = function (name) {
if (globPattern.test(name)) {
_addMatching.call(this, name);
}
else {
this.push(name);
}
}
, _calculateExcludeRe = function () {
var pats = this.excludes.pats
, pat
, excl = []
, matches = [];
for (var i = 0, ii = pats.length; i < ii; i++) {
pat = pats[i];
if (typeof pat == 'string') {
// Glob, look up files
if (/[*?]/.test(pat)) {
matches = glob.globSync(pat);
excl = excl.concat(matches);
}
// String for regex
else {
excl.push(regexpEscape(pat));
}
}
// Regex, grab the string-representation
else if (pat instanceof RegExp) {
excl.push(pat.toString().replace(/^\/|\/$/g, ''));
}
}
if (excl.length) {
this.excludes.regex = new RegExp('(' + excl.join(')|(') + ')');
}
else {
this.excludes.regex = /^$/;
}
}
, _resolveExclude = function () {
var self = this;
_calculateExcludeRe.call(this);
// No `reject` method, so use reverse-filter
this.items = this.items.filter(function (name) {
return !self.shouldExclude(name);
});
}
/**
* Includes file-patterns in the FileList. Should be called with one or more
* pattern for finding file to include in the list. Arguments should be strings
* for either a glob-pattern or a specific file-name, or an array of them
*/
this.include = function () {
var args = Array.isArray(arguments[0]) ? arguments[0] : arguments;
for (var i = 0, ii = args.length; i < ii; i++) {
this.pendingAdd.push(args[i]);
}
};
/**
* Indicates whether a particular file would be filtered out by the current
* exclusion rules for this FileList.
* @param {String} name The filename to check
* @return {Boolean} Whether or not the file should be excluded
*/
this.shouldExclude = function (name) {
if (!this.excludes.regex) {
_calculateExcludeRe.call(this);
}
var excl = this.excludes;
return excl.regex.test(name) || excl.funcs.some(function (f) {
return !!f(name);
});
};
/**
* Excludes file-patterns from the FileList. Should be called with one or more
* pattern for finding file to include in the list. Arguments can be:
* 1. Strings for either a glob-pattern or a specific file-name
* 2. Regular expression literals
* 3. Functions to be run on the filename that return a true/false
*/
this.exclude = function () {
var args = Array.isArray(arguments[0]) ? arguments[0] : arguments
, arg;
for (var i = 0, ii = args.length; i < ii; i++) {
arg = args[i];
if (typeof arg == 'function' && !(arg instanceof RegExp)) {
this.excludes.funcs.push(arg);
}
else {
this.excludes.pats.push(arg);
}
}
if (!this.pending) {
_resolveExclude.call(this);
}
};
/**
* Populates the FileList from the include/exclude rules with a list of
* actual files
*/
this.resolve = function () {
var name;
if (this.pending) {
this.pending = false;
while ((name = this.pendingAdd.shift())) {
_resolveAdd.call(this, name);
}
_resolveExclude.call(this);
}
};
/**
* Convert to a plain-jane array
*/
this.toArray = function () {
// Call slice to ensure lazy-resolution before slicing items
var ret = this.slice().items.slice();
return ret;
};
/**
* Get rid of any current exclusion rules
*/
this.clearExclude = function () {
this.excludes = {
pats: []
, funcs: []
, regex: null
};
};
})();
// Static method, used to create copy returned by special
// array methods
FileList.clone = function (list, items) {
var clone = new FileList();
if (items) {
clone.items = items;
}
clone.pendingAdd = list.pendingAdd;
clone.pending = list.pending;
for (var p in list.excludes) {
clone.excludes[p] = list.excludes[p];
}
return clone;
};
exports.FileList = FileList;