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// 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.
var isWindows = process.platform === 'win32';
var util = require('util');
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// 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) {
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for (; up--; up) {
parts.unshift('..');
}
}
return parts;
}
if (isWindows) {
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// 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() {
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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');
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} else if (!path) {
continue;
}
var result = splitDeviceRe.exec(path),
device = result[1] || '',
isUnc = device && device.charAt(1) !== ':',
isAbsolute = exports.isAbsolute(path),
tail = result[3];
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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);
}
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// 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
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function f(p) {
return !!p;
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}
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resolvedTail = normalizeArray(resolvedTail.split(/[\\\/]+/).filter(f),
!resolvedAbsolute).join('\\');
// If device is a drive letter, we'll normalize to lower case.
if (resolvedDevice && resolvedDevice.charAt(1) === ':')
resolvedDevice = resolvedDevice[0].toLowerCase() +
resolvedDevice.substr(1);
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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) {
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tail = '.';
}
if (tail && trailingSlash) {
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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;
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};
// 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() {
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function f(p) {
if (!util.isString(p)) {
throw new TypeError('Arguments to path.join must be strings');
}
return p;
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}
var paths = Array.prototype.filter.call(arguments, f);
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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);
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};
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// 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++) {
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if (arr[start] !== '') break;
}
var end = arr.length - 1;
for (; end >= 0; end--) {
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if (arr[end] !== '') break;
}
if (start > end) return [];
return arr.slice(start, end + 1);
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}
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++) {
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if (lowerFromParts[i] !== lowerToParts[i]) {
samePartsLength = i;
break;
}
}
if (samePartsLength == 0) {
return to;
}
var outputParts = [];
for (var i = samePartsLength; i < lowerFromParts.length; i++) {
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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() {
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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.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) || '.';
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};
// path.normalize(path)
// posix version
exports.normalize = function(path) {
var isAbsolute = exports.isAbsolute(path),
trailingSlash = path[path.length - 1] === '/',
segments = path.split('/'),
nonEmptySegments = [];
// Normalize the path
for (var i = 0; i < segments.length; i++) {
if (segments[i]) {
nonEmptySegments.push(segments[i]);
}
}
path = normalizeArray(nonEmptySegments, !isAbsolute).join('/');
if (!path && !isAbsolute) {
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path = '.';
}
if (path && trailingSlash) {
path += '/';
}
return (isAbsolute ? '/' : '') + path;
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};
// posix version
exports.isAbsolute = function(path) {
return path.charAt(0) === '/';
};
// posix version
exports.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 exports.normalize(path);
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};
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// 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++) {
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if (arr[start] !== '') break;
}
var end = arr.length - 1;
for (; end >= 0; end--) {
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if (arr[end] !== '') break;
}
if (start > end) return [];
return arr.slice(start, end + 1);
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}
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++) {
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if (fromParts[i] !== toParts[i]) {
samePartsLength = i;
break;
}
}
var outputParts = [];
for (var i = samePartsLength; i < fromParts.length; i++) {
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outputParts.push('..');
}
outputParts = outputParts.concat(toParts.slice(samePartsLength));
return outputParts.join('/');
};
exports.sep = '/';
exports.delimiter = ':';
}
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exports.dirname = function(path) {
var result = splitPath(path),
root = result[0],
dir = result[1];
if (!root && !dir) {
// No dirname whatsoever
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return '.';
}
if (dir) {
// It has a dirname, strip trailing slash
dir = dir.substr(0, dir.length - 1);
}
return root + dir;
};
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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;
};
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exports.extname = function(path) {
return splitPath(path)[3];
};
exports.exists = util.deprecate(function(path, callback) {
require('fs').exists(path, callback);
}, 'path.exists is now called `fs.exists`.');
exports.existsSync = util.deprecate(function(path) {
return require('fs').existsSync(path);
}, 'path.existsSync is now called `fs.existsSync`.');
if (isWindows) {
exports._makeLong = function(path) {
// Note: this will *probably* throw somewhere.
if (!util.isString(path))
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;
};
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}