l0bsterssg

path.js (17060B)

---

 // Copyright Joyent, Inc. and other Node contributors.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a
 // copy of this software and associated documentation files (the
 // "Software"), to deal in the Software without restriction, including
 // without limitation the rights to use, copy, modify, merge, publish,
 // distribute, sublicense, and/or sell copies of the Software, and to permit
 // persons to whom the Software is furnished to do so, subject to the
 // following conditions:
 //
 // The above copyright notice and this permission notice shall be included
 // in all copies or substantial portions of the Software.
 //
 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
 // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 // USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 'use strict';
 
 
 var isWindows = process.platform === 'win32';
 var util = require('util');
 
 
 // resolves . and .. elements in a path array with directory names there
 // must be no slashes or device names (c:\) in the array
 // (so also no leading and trailing slashes - it does not distinguish
 // relative and absolute paths)
 function normalizeArray(parts, allowAboveRoot) {
   var res = [];
   for (var i = 0; i < parts.length; i++) {
     var p = parts[i];
 
     // ignore empty parts
     if (!p || p === '.')
       continue;
 
     if (p === '..') {
       if (res.length && res[res.length - 1] !== '..') {
         res.pop();
       } else if (allowAboveRoot) {
         res.push('..');
       }
     } else {
       res.push(p);
     }
   }
 
   return res;
 }
 
 // returns an array with empty elements removed from either end of the input
 // array or the original array if no elements need to be removed
 function trimArray(arr) {
   var lastIndex = arr.length - 1;
   var start = 0;
   for (; start <= lastIndex; start++) {
     if (arr[start])
       break;
   }
 
   var end = lastIndex;
   for (; end >= 0; end--) {
     if (arr[end])
       break;
   }
 
   if (start === 0 && end === lastIndex)
     return arr;
   if (start > end)
     return [];
   return arr.slice(start, end + 1);
 }
 
 // Regex to split a windows path into three parts: [*, device, slash,
 // tail] windows-only
 var splitDeviceRe =
     /^([a-zA-Z]:|[\\\/]{2}[^\\\/]+[\\\/]+[^\\\/]+)?([\\\/])?([\s\S]*?)$/;
 
 // Regex to split the tail part of the above into [*, dir, basename, ext]
 var splitTailRe =
     /^([\s\S]*?)((?:\.{1,2}|[^\\\/]+?|)(\.[^.\/\\]*|))(?:[\\\/]*)$/;
 
 var win32 = {};
 
 // Function to split a filename into [root, dir, basename, ext]
 function win32SplitPath(filename) {
   // Separate device+slash from tail
   var result = splitDeviceRe.exec(filename),
       device = (result[1] || '') + (result[2] || ''),
       tail = result[3] || '';
   // Split the tail into dir, basename and extension
   var result2 = splitTailRe.exec(tail),
       dir = result2[1],
       basename = result2[2],
       ext = result2[3];
   return [device, dir, basename, ext];
 }
 
 function win32StatPath(path) {
   var result = splitDeviceRe.exec(path),
       device = result[1] || '',
       isUnc = !!device && device[1] !== ':';
   return {
     device: device,
     isUnc: isUnc,
     isAbsolute: isUnc || !!result[2], // UNC paths are always absolute
     tail: result[3]
   };
 }
 
 function normalizeUNCRoot(device) {
   return '\\\\' + device.replace(/^[\\\/]+/, '').replace(/[\\\/]+/g, '\\');
 }
 
 // path.resolve([from ...], to)
 win32.resolve = function() {
   var resolvedDevice = '',
       resolvedTail = '',
       resolvedAbsolute = false;
 
   for (var i = arguments.length - 1; i >= -1; i--) {
     var path;
     if (i >= 0) {
       path = arguments[i];
     } else if (!resolvedDevice) {
       path = process.cwd();
     } else {
       // Windows has the concept of drive-specific current working
       // directories. If we've resolved a drive letter but not yet an
       // absolute path, get cwd for that drive. We're sure the device is not
       // an unc path at this points, because unc paths are always absolute.
       path = process.env['=' + resolvedDevice];
       // Verify that a drive-local cwd was found and that it actually points
       // to our drive. If not, default to the drive's root.
       if (!path || path.substr(0, 3).toLowerCase() !==
           resolvedDevice.toLowerCase() + '\\') {
         path = resolvedDevice + '\\';
       }
     }
 
     // Skip empty and invalid entries
     if (!util.isString(path)) {
       throw new TypeError('Arguments to path.resolve must be strings');
     } else if (!path) {
       continue;
     }
 
     var result = win32StatPath(path),
         device = result.device,
         isUnc = result.isUnc,
         isAbsolute = result.isAbsolute,
         tail = result.tail;
 
     if (device &&
         resolvedDevice &&
         device.toLowerCase() !== resolvedDevice.toLowerCase()) {
       // This path points to another device so it is not applicable
       continue;
     }
 
     if (!resolvedDevice) {
       resolvedDevice = device;
     }
     if (!resolvedAbsolute) {
       resolvedTail = tail + '\\' + resolvedTail;
       resolvedAbsolute = isAbsolute;
     }
 
     if (resolvedDevice && resolvedAbsolute) {
       break;
     }
   }
 
   // Convert slashes to backslashes when `resolvedDevice` points to an UNC
   // root. Also squash multiple slashes into a single one where appropriate.
   if (isUnc) {
     resolvedDevice = normalizeUNCRoot(resolvedDevice);
   }
 
   // At this point the path should be resolved to a full absolute path,
   // but handle relative paths to be safe (might happen when process.cwd()
   // fails)
 
   // Normalize the tail path
   resolvedTail = normalizeArray(resolvedTail.split(/[\\\/]+/),
                                 !resolvedAbsolute).join('\\');
 
   return (resolvedDevice + (resolvedAbsolute ? '\\' : '') + resolvedTail) ||
          '.';
 };
 
 
 win32.normalize = function(path) {
   var result = win32StatPath(path),
       device = result.device,
       isUnc = result.isUnc,
       isAbsolute = result.isAbsolute,
       tail = result.tail,
       trailingSlash = /[\\\/]$/.test(tail);
 
   // Normalize the tail path
   tail = normalizeArray(tail.split(/[\\\/]+/), !isAbsolute).join('\\');
 
   if (!tail && !isAbsolute) {
     tail = '.';
   }
   if (tail && trailingSlash) {
     tail += '\\';
   }
 
   // Convert slashes to backslashes when `device` points to an UNC root.
   // Also squash multiple slashes into a single one where appropriate.
   if (isUnc) {
     device = normalizeUNCRoot(device);
   }
 
   return device + (isAbsolute ? '\\' : '') + tail;
 };
 
 
 win32.isAbsolute = function(path) {
   return win32StatPath(path).isAbsolute;
 };
 
 win32.join = function() {
   var paths = [];
   for (var i = 0; i < arguments.length; i++) {
     var arg = arguments[i];
     if (!util.isString(arg)) {
       throw new TypeError('Arguments to path.join must be strings');
     }
     if (arg) {
       paths.push(arg);
     }
   }
 
   var joined = paths.join('\\');
 
   // Make sure that the joined path doesn't start with two slashes, because
   // normalize() will mistake it for an UNC path then.
   //
   // This step is skipped when it is very clear that the user actually
   // intended to point at an UNC path. This is assumed when the first
   // non-empty string arguments starts with exactly two slashes followed by
   // at least one more non-slash character.
   //
   // Note that for normalize() to treat a path as an UNC path it needs to
   // have at least 2 components, so we don't filter for that here.
   // This means that the user can use join to construct UNC paths from
   // a server name and a share name; for example:
   //   path.join('//server', 'share') -> '\\\\server\\share\')
   if (!/^[\\\/]{2}[^\\\/]/.test(paths[0])) {
     joined = joined.replace(/^[\\\/]{2,}/, '\\');
   }
 
   return win32.normalize(joined);
 };
 
 
 // path.relative(from, to)
 // it will solve the relative path from 'from' to 'to', for instance:
 // from = 'C:\\orandea\\test\\aaa'
 // to = 'C:\\orandea\\impl\\bbb'
 // The output of the function should be: '..\\..\\impl\\bbb'
 win32.relative = function(from, to) {
   from = win32.resolve(from);
   to = win32.resolve(to);
 
   // windows is not case sensitive
   var lowerFrom = from.toLowerCase();
   var lowerTo = to.toLowerCase();
 
   var toParts = trimArray(to.split('\\'));
 
   var lowerFromParts = trimArray(lowerFrom.split('\\'));
   var lowerToParts = trimArray(lowerTo.split('\\'));
 
   var length = Math.min(lowerFromParts.length, lowerToParts.length);
   var samePartsLength = length;
   for (var i = 0; i < length; i++) {
     if (lowerFromParts[i] !== lowerToParts[i]) {
       samePartsLength = i;
       break;
     }
   }
 
   if (samePartsLength == 0) {
     return to;
   }
 
   var outputParts = [];
   for (var i = samePartsLength; i < lowerFromParts.length; i++) {
     outputParts.push('..');
   }
 
   outputParts = outputParts.concat(toParts.slice(samePartsLength));
 
   return outputParts.join('\\');
 };
 
 
 win32._makeLong = function(path) {
   // Note: this will *probably* throw somewhere.
   if (!util.isString(path))
     return path;
 
   if (!path) {
     return '';
   }
 
   var resolvedPath = win32.resolve(path);
 
   if (/^[a-zA-Z]\:\\/.test(resolvedPath)) {
     // path is local filesystem path, which needs to be converted
     // to long UNC path.
     return '\\\\?\\' + resolvedPath;
   } else if (/^\\\\[^?.]/.test(resolvedPath)) {
     // path is network UNC path, which needs to be converted
     // to long UNC path.
     return '\\\\?\\UNC\\' + resolvedPath.substring(2);
   }
 
   return path;
 };
 
 
 win32.dirname = function(path) {
   var result = win32SplitPath(path),
       root = result[0],
       dir = result[1];
 
   if (!root && !dir) {
     // No dirname whatsoever
     return '.';
   }
 
   if (dir) {
     // It has a dirname, strip trailing slash
     dir = dir.substr(0, dir.length - 1);
   }
 
   return root + dir;
 };
 
 
 win32.basename = function(path, ext) {
   var f = win32SplitPath(path)[2];
   // TODO: make this comparison case-insensitive on windows?
   if (ext && f.substr(-1 * ext.length) === ext) {
     f = f.substr(0, f.length - ext.length);
   }
   return f;
 };
 
 
 win32.extname = function(path) {
   return win32SplitPath(path)[3];
 };
 
 
 win32.format = function(pathObject) {
   if (!util.isObject(pathObject)) {
     throw new TypeError(
         "Parameter 'pathObject' must be an object, not " + typeof pathObject
     );
   }
 
   var root = pathObject.root || '';
 
   if (!util.isString(root)) {
     throw new TypeError(
         "'pathObject.root' must be a string or undefined, not " +
         typeof pathObject.root
     );
   }
 
   var dir = pathObject.dir;
   var base = pathObject.base || '';
   if (!dir) {
     return base;
   }
   if (dir[dir.length - 1] === win32.sep) {
     return dir + base;
   }
   return dir + win32.sep + base;
 };
 
 
 win32.parse = function(pathString) {
   if (!util.isString(pathString)) {
     throw new TypeError(
         "Parameter 'pathString' must be a string, not " + typeof pathString
     );
   }
   var allParts = win32SplitPath(pathString);
   if (!allParts || allParts.length !== 4) {
     throw new TypeError("Invalid path '" + pathString + "'");
   }
   return {
     root: allParts[0],
     dir: allParts[0] + allParts[1].slice(0, -1),
     base: allParts[2],
     ext: allParts[3],
     name: allParts[2].slice(0, allParts[2].length - allParts[3].length)
   };
 };
 
 
 win32.sep = '\\';
 win32.delimiter = ';';
 
 
 // Split a filename into [root, dir, basename, ext], unix version
 // 'root' is just a slash, or nothing.
 var splitPathRe =
     /^(\/?|)([\s\S]*?)((?:\.{1,2}|[^\/]+?|)(\.[^.\/]*|))(?:[\/]*)$/;
 var posix = {};
 
 
 function posixSplitPath(filename) {
   return splitPathRe.exec(filename).slice(1);
 }
 
 
 // path.resolve([from ...], to)
 // posix version
 posix.resolve = function() {
   var resolvedPath = '',
       resolvedAbsolute = false;
 
   for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
     var path = (i >= 0) ? arguments[i] : process.cwd();
 
     // Skip empty and invalid entries
     if (!util.isString(path)) {
       throw new TypeError('Arguments to path.resolve must be strings');
     } else if (!path) {
       continue;
     }
 
     resolvedPath = path + '/' + resolvedPath;
     resolvedAbsolute = path[0] === '/';
   }
 
   // At this point the path should be resolved to a full absolute path, but
   // handle relative paths to be safe (might happen when process.cwd() fails)
 
   // Normalize the path
   resolvedPath = normalizeArray(resolvedPath.split('/'),
                                 !resolvedAbsolute).join('/');
 
   return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';
 };
 
 // path.normalize(path)
 // posix version
 posix.normalize = function(path) {
   var isAbsolute = posix.isAbsolute(path),
       trailingSlash = path && path[path.length - 1] === '/';
 
   // Normalize the path
   path = normalizeArray(path.split('/'), !isAbsolute).join('/');
 
   if (!path && !isAbsolute) {
     path = '.';
   }
   if (path && trailingSlash) {
     path += '/';
   }
 
   return (isAbsolute ? '/' : '') + path;
 };
 
 // posix version
 posix.isAbsolute = function(path) {
   return path.charAt(0) === '/';
 };
 
 // posix version
 posix.join = function() {
   var path = '';
   for (var i = 0; i < arguments.length; i++) {
     var segment = arguments[i];
     if (!util.isString(segment)) {
       throw new TypeError('Arguments to path.join must be strings');
     }
     if (segment) {
       if (!path) {
         path += segment;
       } else {
         path += '/' + segment;
       }
     }
   }
   return posix.normalize(path);
 };
 
 
 // path.relative(from, to)
 // posix version
 posix.relative = function(from, to) {
   from = posix.resolve(from).substr(1);
   to = posix.resolve(to).substr(1);
 
   var fromParts = trimArray(from.split('/'));
   var toParts = trimArray(to.split('/'));
 
   var length = Math.min(fromParts.length, toParts.length);
   var samePartsLength = length;
   for (var i = 0; i < length; i++) {
     if (fromParts[i] !== toParts[i]) {
       samePartsLength = i;
       break;
     }
   }
 
   var outputParts = [];
   for (var i = samePartsLength; i < fromParts.length; i++) {
     outputParts.push('..');
   }
 
   outputParts = outputParts.concat(toParts.slice(samePartsLength));
 
   return outputParts.join('/');
 };
 
 
 posix._makeLong = function(path) {
   return path;
 };
 
 
 posix.dirname = function(path) {
   var result = posixSplitPath(path),
       root = result[0],
       dir = result[1];
 
   if (!root && !dir) {
     // No dirname whatsoever
     return '.';
   }
 
   if (dir) {
     // It has a dirname, strip trailing slash
     dir = dir.substr(0, dir.length - 1);
   }
 
   return root + dir;
 };
 
 
 posix.basename = function(path, ext) {
   var f = posixSplitPath(path)[2];
   // TODO: make this comparison case-insensitive on windows?
   if (ext && f.substr(-1 * ext.length) === ext) {
     f = f.substr(0, f.length - ext.length);
   }
   return f;
 };
 
 
 posix.extname = function(path) {
   return posixSplitPath(path)[3];
 };
 
 
 posix.format = function(pathObject) {
   if (!util.isObject(pathObject)) {
     throw new TypeError(
         "Parameter 'pathObject' must be an object, not " + typeof pathObject
     );
   }
 
   var root = pathObject.root || '';
 
   if (!util.isString(root)) {
     throw new TypeError(
         "'pathObject.root' must be a string or undefined, not " +
         typeof pathObject.root
     );
   }
 
   var dir = pathObject.dir ? pathObject.dir + posix.sep : '';
   var base = pathObject.base || '';
   return dir + base;
 };
 
 
 posix.parse = function(pathString) {
   if (!util.isString(pathString)) {
     throw new TypeError(
         "Parameter 'pathString' must be a string, not " + typeof pathString
     );
   }
   var allParts = posixSplitPath(pathString);
   if (!allParts || allParts.length !== 4) {
     throw new TypeError("Invalid path '" + pathString + "'");
   }
   allParts[1] = allParts[1] || '';
   allParts[2] = allParts[2] || '';
   allParts[3] = allParts[3] || '';
 
   return {
     root: allParts[0],
     dir: allParts[0] + allParts[1].slice(0, -1),
     base: allParts[2],
     ext: allParts[3],
     name: allParts[2].slice(0, allParts[2].length - allParts[3].length)
   };
 };
 
 
 posix.sep = '/';
 posix.delimiter = ':';
 
 
 if (isWindows)
   module.exports = win32;
 else /* posix */
   module.exports = posix;
 
 module.exports.posix = posix;
 module.exports.win32 = win32;