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JavaScript

/*
* 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 = require('minimatch')
, escapeRegExpChars
, merge
, basedir
, _readDir
, readdirR
, globSync;
var hasOwnProperty = Object.prototype.hasOwnProperty;
var hasOwn = function (obj, key) { return hasOwnProperty.apply(obj, [key]); };
/**
@name escapeRegExpChars
@function
@return {String} A string of escaped characters
@description Escapes regex control-characters in strings
used to build regexes dynamically
@param {String} string The string of chars to escape
*/
escapeRegExpChars = (function () {
var specials = [ '^', '$', '/', '.', '*', '+', '?', '|', '(', ')',
'[', ']', '{', '}', '\\' ];
var sRE = new RegExp('(\\' + specials.join('|\\') + ')', 'g');
return function (string) {
var str = string || '';
str = String(str);
return str.replace(sRE, '\\$1');
};
})();
/**
@name merge
@function
@return {Object} Returns the merged object
@description Merge merges `otherObject` into `object` and takes care of deep
merging of objects
@param {Object} object Object to merge into
@param {Object} otherObject Object to read from
*/
merge = function (object, otherObject) {
var obj = object || {}
, otherObj = otherObject || {}
, key, value;
for (key in otherObj) {
if (!hasOwn(otherObj, key)) {
continue;
}
if (key === '__proto__' || key === 'constructor') {
continue;
}
value = otherObj[key];
// Check if a value is an Object, if so recursively add it's key/values
if (typeof value === 'object' && !(value instanceof Array)) {
// Update value of object to the one from otherObj
obj[key] = merge(obj[key], value);
}
// Value is anything other than an Object, so just add it
else {
obj[key] = value;
}
}
return obj;
};
/**
Given a patern, return the base directory of it (ie. the folder
that will contain all the files matching the path).
eg. file.basedir('/test/**') => '/test/'
Path ending by '/' are considerd as folder while other are considerd
as files, eg.:
file.basedir('/test/a/') => '/test/a'
file.basedir('/test/a') => '/test'
The returned path always end with a '/' so we have:
file.basedir(file.basedir(x)) == file.basedir(x)
*/
basedir = function (pathParam) {
var bd = ''
, parts
, part
, pos = 0
, p = pathParam || '';
// If the path has a leading asterisk, basedir is the current dir
if (p.indexOf('*') == 0 || p.indexOf('**') == 0) {
return '.';
}
// always consider .. at the end as a folder and not a filename
if (/(?:^|\/|\\)\.\.$/.test(p.slice(-3))) {
p += '/';
}
parts = p.split(/\\|\//);
for (var i = 0, l = parts.length - 1; i < l; i++) {
part = parts[i];
if (part.indexOf('*') > -1 || part.indexOf('**') > -1) {
break;
}
pos += part.length + 1;
bd += part + p[pos - 1];
}
if (!bd) {
bd = '.';
}
// Strip trailing slashes
if (!(bd == '\\' || bd == '/')) {
bd = bd.replace(/\\$|\/$/, '');
}
return bd;
};
// Return the contents of a given directory
_readDir = function (dirPath) {
var dir = path.normalize(dirPath)
, paths = []
, ret = [dir]
, msg;
try {
paths = fs.readdirSync(dir);
}
catch (e) {
msg = 'Could not read path ' + dir + '\n';
if (e.stack) {
msg += e.stack;
}
throw new Error(msg);
}
paths.forEach(function (p) {
var curr = path.join(dir, p);
var stat = fs.statSync(curr);
if (stat.isDirectory()) {
ret = ret.concat(_readDir(curr));
}
else {
ret.push(curr);
}
});
return ret;
};
/**
@name file#readdirR
@function
@return {Array} Returns the contents as an Array, can be configured via opts.format
@description Reads the given directory returning it's contents
@param {String} dir The directory to read
@param {Object} opts Options to use
@param {String} [opts.format] Set the format to return(Default: Array)
*/
readdirR = function (dir, opts) {
var options = opts || {}
, format = options.format || 'array'
, ret;
ret = _readDir(dir);
return format == 'string' ? ret.join('\n') : ret;
};
globSync = function (pat, opts) {
var dirname = basedir(pat)
, files
, matches;
try {
files = readdirR(dirname).map(function(file){
return file.replace(/\\/g, '/');
});
}
// Bail if path doesn't exist -- assume no files
catch(e) {
if (FileList.verbose) console.error(e.message);
}
if (files) {
pat = path.normalize(pat);
matches = minimatch.match(files, pat, opts || {});
}
return matches || [];
};
// Constants
// ---------------
// List of all the builtin Array methods we want to override
var ARRAY_METHODS = Object.getOwnPropertyNames(Array.prototype)
// Array methods that return a copy instead of affecting the original
, SPECIAL_RETURN = {
'concat': true
, 'slice': true
, 'filter': true
, 'map': true
}
// Default file-patterns we want to ignore
, DEFAULT_IGNORE_PATTERNS = [
/(^|[\/\\])CVS([\/\\]|$)/
, /(^|[\/\\])\.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;
}
];
var FileList = function () {
var self = this
, wrap;
// 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 (item) {
var matches = globSync(item.path, item.options);
this.items = this.items.concat(matches);
}
, _resolveAdd = function (item) {
if (globPattern.test(item.path)) {
_addMatching.call(this, item);
}
else {
this.push(item.path);
}
}
, _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 = globSync(pat);
matches = matches.map(function (m) {
return escapeRegExpChars(m);
});
excl = excl.concat(matches);
}
// String for regex
else {
excl.push(escapeRegExpChars(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.prototype.slice.call(arguments)
, arg
, includes = { items: [], options: {} };
for (var i = 0, ilen = args.length; i < ilen; i++) {
arg = args[i];
if (typeof arg === 'object' && !Array.isArray(arg)) {
merge(includes.options, arg);
} else {
includes.items = includes.items.concat(arg).filter(function (item) {
return !!item;
});
}
}
var items = includes.items.map(function(item) {
return { path: item, options: includes.options };
});
this.pendingAdd = this.pendingAdd.concat(items);
return this;
};
/**
* 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);
}
return this;
};
/**
* Populates the FileList from the include/exclude rules with a list of
* actual files
*/
this.resolve = function () {
var item
, uniqueFunc = function (p, c) {
if (p.indexOf(c) < 0) {
p.push(c);
}
return p;
};
if (this.pending) {
this.pending = false;
while ((item = this.pendingAdd.shift())) {
_resolveAdd.call(this, item);
}
// Reduce to a unique list
this.items = this.items.reduce(uniqueFunc, []);
// Remove exclusions
_resolveExclude.call(this);
}
return 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;
};
/**
* Clear any pending items -- only useful before
* calling `resolve`
*/
this.clearInclusions = function () {
this.pendingAdd = [];
return this;
};
/**
* Clear any current exclusion rules
*/
this.clearExclusions = function () {
this.excludes = {
pats: []
, funcs: []
, regex: null
};
return this;
};
})();
// 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;
};
FileList.verbose = true
exports.FileList = FileList;