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/** | ||
* (C) Microsoft Open Technologies, Inc. All rights reserved. | ||
* | ||
* 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. | ||
*/ | ||
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var PATH = require('path'); | ||
var fs = require('fs'); | ||
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/** | ||
* @type {Function} wildcard(pattern) | ||
* wildcard searches for files matching pattern. | ||
* | ||
* @pattern {String} search pattern with optional * wildcards | ||
* @return an array containing the paths to the matching files | ||
*/ | ||
var wildcard = exports.wildcard = function(pattern) { | ||
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// process pattern string for * wildcard | ||
var matchers = [], | ||
tokens, | ||
path; | ||
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var index = pattern.indexOf('*'); | ||
if(index === -1) { | ||
return [pattern]; | ||
} | ||
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path = pattern.substr(0, index-1); | ||
pattern = pattern.substr(index); | ||
pattern = pattern.replace(/\*/g, '(?=.*)'); | ||
tokens = pattern.split(PATH.sep); | ||
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// create matcher regex for each path component in pattern | ||
tokens.forEach(function(token, index, array) { | ||
var matcher = {}; | ||
matcher.index = index; | ||
matcher.isDir = index < array.length -1; | ||
matcher.regex = new RegExp(token); | ||
matchers.push(matcher); | ||
}); | ||
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return process(path, matchers); | ||
}; | ||
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// searches starting from the path directory and returns files matching wildcard pattern | ||
// search only proceeds to directory depth equal to the numbe rof matchers. | ||
var process = function(path, matchers) { | ||
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var files = []; | ||
var traverse = function(path, level) { | ||
var dirs, | ||
matcher; | ||
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// check we have not exceeded search directory depth | ||
if(level >= matchers.length) { | ||
return; | ||
} | ||
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// read the dirs and files from the current path | ||
dirs = fs.readdirSync(path); | ||
matcher = matchers[level]; | ||
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// check if each dir or file matches the matcher for the current directory level | ||
for(var i = 0; i < dirs.length; i++) { | ||
var dir = dirs[i]; | ||
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if(dir.match(matcher.regex) === null) { | ||
continue; | ||
} | ||
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var pathName = PATH.join(path,dir); | ||
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var stats = fs.statSync(pathName); | ||
if(stats.isDirectory()) { | ||
if(matcher.isDir) { | ||
traverse(pathName, level + 1); | ||
} else { | ||
continue; | ||
} | ||
} | ||
else if(level === matchers.length - 1) { | ||
// found a matching file | ||
if(stats.isFile()) { | ||
files.push(pathName); | ||
} | ||
} | ||
} | ||
}; | ||
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traverse(path, 0); | ||
return files; | ||
}; | ||
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//var pattern = '/Users/stammen/dev/microsoft/pkgcloud/test/*/*/*-test.js'; | ||
// | ||
//var result = wildcard(pattern); | ||
//console.log(result); | ||
//console.log(result.length); | ||
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