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file_map.js
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file_map.js
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/*!
* Pop - Recursive file analyser.
* Copyright 2011 Alex R. Young
* MIT Licensed
*/
/**
* Module dependencies.
*/
var fs = require(__dirname + '/graceful')
, path = require('path')
, log = require(__dirname + '/pop').log
, EventEmitter = require('events').EventEmitter;
/**
* Initialize `FileMap` with a config object.
*
* @param {Object} options
* @api public
*/
function FileMap(config) {
this.config = config || {};
this.config.exclude = config && config.exclude ? config.exclude : [];
this.config.exclude.push('/_site');
this.ignoreDotFiles = true;
this.root = config.root;
this.files = [];
this.events = new EventEmitter();
this.filesLeft = 0;
this.dirsLeft = 1;
}
/**
* Determines file type based on file extension.
*
* @param {String} File name
* @return {String} Internal file type used by `SiteBuilder`
*/
FileMap.prototype.fileType = function(fileName) {
var extension = path.extname(fileName).substring(1);
if (fileName.match(/\/_posts\//)) {
return 'post ' + extension;
} else if (fileName.match(/\/_layouts\//)) {
return 'layout ' + extension;
} else if (fileName.match(/\/_includes\//)) {
return 'include ' + extension;
} else if (['jade', 'ejs', 'styl'].indexOf(extension) !== -1) {
return 'file ' + extension;
} else {
return 'file';
}
};
/**
* Recursively iterates from an initial path.
*
* @param {String} Start path name
*/
FileMap.prototype.walk = function(dir) {
if (!dir) dir = this.root;
var self = this;
fs.readdir(dir, function(err, files) {
self.dirsLeft--;
if (!files) return;
files.forEach(function(file) {
file = path.join(dir, file);
self.filesLeft++;
fs.stat(file, function(err, stats) {
if (err) log.error('Error:', err);
if (!stats) return;
if (stats.isDirectory(file)) {
self.filesLeft--;
self.dirsLeft++;
self.walk(file);
self.addFile(file, 'dir');
} else {
self.filesLeft--;
self.addFile(file, self.fileType(file));
if (self.filesLeft === 0 && self.dirsLeft === 0) {
process.nextTick(function() {
self.events.emit('ready');
});
}
}
});
});
});
};
/**
* Searches for files that match `pattern`.
*
* @param {String} A pattern to search for
*/
FileMap.prototype.search = function(pattern) {
this.searchPattern = pattern;
this.walk();
};
/**
* Checks to see if a file name matches the excluded patterns.
*
* @param {String} File name
* @return {Boolean} Should the file be excluded?
*/
FileMap.prototype.isExcludedFile = function(file) {
if (this.ignoreDotFiles)
if (file.match(/\/\./)) return true;
return this.config.exclude.some(function(pattern) {
return file.match(pattern);
});
};
/**
* Determines file type based on file extension.
*
* @param {String} File name
* @param {String} File type
*/
FileMap.prototype.addFile = function(file, type) {
if (this.isExcludedFile(file)) return;
if (this.searchPattern && !file.match(this.searchPattern)) return;
this.files.push({
name: file,
type: type,
});
};
/**
* Bind an event to the internal `EventEmitter`.
*
* @param {String} Event name
* @param {Function} Handler
*/
FileMap.prototype.on = function(eventName, fn) {
this.events.on(eventName, fn);
};
module.exports = FileMap;