The Tor Browser: addon-sdk/source/lib/sdk/fs/path.js@6474c204b198 (annotated)

addon-sdk/source/lib/sdk/fs/path.js@6474c204b198 (annotated)

addon-sdk/source/lib/sdk/fs/path.js

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 // 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.
 // Adapted version of:
 // https://github.com/joyent/node/blob/v0.11.3/lib/path.js
 // Shim process global from node.
 var process = Object.create(require('../system'));
 process.cwd = process.pathFor.bind(process, 'CurProcD');
 // Update original check in node `process.platform === 'win32'` since in SDK it's `winnt`.
 var isWindows = process.platform.indexOf('win') === 0;
 // resolves . and .. elements in a path array with directory names there
 // must be no slashes, empty elements, 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) {
   // if the path tries to go above the root, `up` ends up > 0
   var up = 0;
   for (var i = parts.length - 1; i >= 0; i--) {
     var last = parts[i];
     if (last === '.') {
       parts.splice(i, 1);
     } else if (last === '..') {
       parts.splice(i, 1);
       up++;
     } else if (up) {
       parts.splice(i, 1);
       up--;
     }
   }
   // if the path is allowed to go above the root, restore leading ..s
   if (allowAboveRoot) {
     for (; up--; up) {
       parts.unshift('..');
     }
   }
   return parts;
 }
 if (isWindows) {
   // Regex to split a windows path into three parts: [*, device, slash,
   // tail] windows-only
   var splitDeviceRe =
       /^([a-zA-Z]:|[\\\/]{2}[^\\\/]+[\\\/]+[^\\\/]+)?([\\\/])?([\s\S]*?)$/;
   // Regex to split the tail part of the above into [*, dir, basename, ext]
   var splitTailRe =
       /^([\s\S]*?)((?:\.{1,2}|[^\\\/]+?|)(\.[^.\/\\]*|))(?:[\\\/]*)$/;
   // Function to split a filename into [root, dir, basename, ext]
   // windows version
   var splitPath = function(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];
   };
   var normalizeUNCRoot = function(device) {
     return '\\\\' + device.replace(/^[\\\/]+/, '').replace(/[\\\/]+/g, '\\');
   };
   // path.resolve([from ...], to)
   // windows version
   exports.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 (typeof path !== 'string') {
         throw new TypeError('Arguments to path.resolve must be strings');
       } else if (!path) {
         continue;
       }
       var result = splitDeviceRe.exec(path),
           device = result[1] || '',
           isUnc = device && device.charAt(1) !== ':',
           isAbsolute = exports.isAbsolute(path),
           tail = result[3];
       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
     function f(p) {
       return !!p;
     }
     resolvedTail = normalizeArray(resolvedTail.split(/[\\\/]+/).filter(f),
                                   !resolvedAbsolute).join('\\');
     return (resolvedDevice + (resolvedAbsolute ? '\\' : '') + resolvedTail) ||
            '.';
   };
   // windows version
   exports.normalize = function(path) {
     var result = splitDeviceRe.exec(path),
         device = result[1] || '',
         isUnc = device && device.charAt(1) !== ':',
         isAbsolute = exports.isAbsolute(path),
         tail = result[3],
         trailingSlash = /[\\\/]$/.test(tail);
     // If device is a drive letter, we'll normalize to lower case.
     if (device && device.charAt(1) === ':') {
       device = device[0].toLowerCase() + device.substr(1);
     }
     // Normalize the tail path
     tail = normalizeArray(tail.split(/[\\\/]+/).filter(function(p) {
       return !!p;
     }), !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;
   };
   // windows version
   exports.isAbsolute = function(path) {
     var result = splitDeviceRe.exec(path),
         device = result[1] || '',
         isUnc = device && device.charAt(1) !== ':';
     // UNC paths are always absolute
     return !!result[2] || isUnc;
   };
   // windows version
   exports.join = function() {
     function f(p) {
       if (typeof p !== 'string') {
         throw new TypeError('Arguments to path.join must be strings');
       }
       return p;
     }
     var paths = Array.prototype.filter.call(arguments, f);
     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 exports.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'
   // windows version
   exports.relative = function(from, to) {
     from = exports.resolve(from);
     to = exports.resolve(to);
     // windows is not case sensitive
     var lowerFrom = from.toLowerCase();
     var lowerTo = to.toLowerCase();
     function trim(arr) {
       var start = 0;
       for (; start < arr.length; start++) {
         if (arr[start] !== '') break;
       }
       var end = arr.length - 1;
       for (; end >= 0; end--) {
         if (arr[end] !== '') break;
       }
       if (start > end) return [];
       return arr.slice(start, end - start + 1);
     }
     var toParts = trim(to.split('\\'));
     var lowerFromParts = trim(lowerFrom.split('\\'));
     var lowerToParts = trim(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('\\');
   };
   exports.sep = '\\';
   exports.delimiter = ';';
 } else /* posix */ {
   // Split a filename into [root, dir, basename, ext], unix version
   // 'root' is just a slash, or nothing.
   var splitPathRe =
       /^(\/?|)([\s\S]*?)((?:\.{1,2}|[^\/]+?|)(\.[^.\/]*|))(?:[\/]*)$/;
   var splitPath = function(filename) {
     return splitPathRe.exec(filename).slice(1);
   };
   // path.resolve([from ...], to)
   // posix version
   exports.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 (typeof path !== 'string') {
         throw new TypeError('Arguments to path.resolve must be strings');
       } else if (!path) {
         continue;
       }
       resolvedPath = path + '/' + resolvedPath;
       resolvedAbsolute = path.charAt(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('/').filter(function(p) {
       return !!p;
     }), !resolvedAbsolute).join('/');
     return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';
   };
   // path.normalize(path)
   // posix version
   exports.normalize = function(path) {
     var isAbsolute = exports.isAbsolute(path),
         trailingSlash = path.substr(-1) === '/';
     // Normalize the path
     path = normalizeArray(path.split('/').filter(function(p) {
       return !!p;
     }), !isAbsolute).join('/');
     if (!path && !isAbsolute) {
       path = '.';
     }
     if (path && trailingSlash) {
       path += '/';
     }
     return (isAbsolute ? '/' : '') + path;
   };
   // posix version
   exports.isAbsolute = function(path) {
     return path.charAt(0) === '/';
   };
   // posix version
   exports.join = function() {
     var paths = Array.prototype.slice.call(arguments, 0);
     return exports.normalize(paths.filter(function(p, index) {
       if (typeof p !== 'string') {
         throw new TypeError('Arguments to path.join must be strings');
       }
       return p;
     }).join('/'));
   };
   // path.relative(from, to)
   // posix version
   exports.relative = function(from, to) {
     from = exports.resolve(from).substr(1);
     to = exports.resolve(to).substr(1);
     function trim(arr) {
       var start = 0;
       for (; start < arr.length; start++) {
         if (arr[start] !== '') break;
       }
       var end = arr.length - 1;
       for (; end >= 0; end--) {
         if (arr[end] !== '') break;
       }
       if (start > end) return [];
       return arr.slice(start, end - start + 1);
     }
     var fromParts = trim(from.split('/'));
     var toParts = trim(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('/');
   };
   exports.sep = '/';
   exports.delimiter = ':';
 }
 exports.dirname = function(path) {
   var result = splitPath(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;
 };
 exports.basename = function(path, ext) {
   var f = splitPath(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;
 };
 exports.extname = function(path) {
   return splitPath(path)[3];
 };
 if (isWindows) {
   exports._makeLong = function(path) {
     // Note: this will *probably* throw somewhere.
     if (typeof path !== 'string')
       return path;
     if (!path) {
       return '';
     }
     var resolvedPath = exports.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;
   };
 } else {
   exports._makeLong = function(path) {
     return path;
   };
 }