@aplus/node/resolver/path.js

⭐ Axway Amplify module for using Node.js code with Appcelerator Titanium SDK

// 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';

// const inspect = require('util').inspect;

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };

var inspect = function inspect(obj) {
	return obj;
};

function assertPath(path) {
	if (typeof path !== 'string') {
		throw new TypeError('Path must be a string. Received ' + inspect(path));
	}
}

// Resolves . and .. elements in a path with directory names
function normalizeStringWin32(path, allowAboveRoot) {
	var res = '';
	var lastSlash = -1;
	var dots = 0;
	var code;
	for (var i = 0; i <= path.length; ++i) {
		if (i < path.length) code = path.charCodeAt(i);else if (code === 47 /*/*/ || code === 92 /*\*/) break;else code = 47 /*/*/;
		if (code === 47 /*/*/ || code === 92 /*\*/) {
				if (lastSlash === i - 1 || dots === 1) {
					// NOOP
				} else if (lastSlash !== i - 1 && dots === 2) {
						if (res.length < 2 || res.charCodeAt(res.length - 1) !== 46 /*.*/ || res.charCodeAt(res.length - 2) !== 46 /*.*/) {
								if (res.length > 2) {
									var start = res.length - 1;
									var j = start;
									for (; j >= 0; --j) {
										if (res.charCodeAt(j) === 92 /*\*/) break;
									}
									if (j !== start) {
										if (j === -1) res = '';else res = res.slice(0, j);
										lastSlash = i;
										dots = 0;
										continue;
									}
								} else if (res.length === 2 || res.length === 1) {
									res = '';
									lastSlash = i;
									dots = 0;
									continue;
								}
							}
						if (allowAboveRoot) {
							if (res.length > 0) res += '\\..';else res = '..';
						}
					} else {
						if (res.length > 0) res += '\\' + path.slice(lastSlash + 1, i);else res = path.slice(lastSlash + 1, i);
					}
				lastSlash = i;
				dots = 0;
			} else if (code === 46 /*.*/ && dots !== -1) {
			++dots;
		} else {
			dots = -1;
		}
	}
	return res;
}

// Resolves . and .. elements in a path with directory names
function normalizeStringPosix(path, allowAboveRoot) {
	var res = '';
	var lastSlash = -1;
	var dots = 0;
	var code;
	for (var i = 0; i <= path.length; ++i) {
		if (i < path.length) code = path.charCodeAt(i);else if (code === 47 /*/*/) break;else code = 47 /*/*/;
		if (code === 47 /*/*/) {
				if (lastSlash === i - 1 || dots === 1) {
					// NOOP
				} else if (lastSlash !== i - 1 && dots === 2) {
						if (res.length < 2 || res.charCodeAt(res.length - 1) !== 46 /*.*/ || res.charCodeAt(res.length - 2) !== 46 /*.*/) {
								if (res.length > 2) {
									var start = res.length - 1;
									var j = start;
									for (; j >= 0; --j) {
										if (res.charCodeAt(j) === 47 /*/*/) break;
									}
									if (j !== start) {
										if (j === -1) res = '';else res = res.slice(0, j);
										lastSlash = i;
										dots = 0;
										continue;
									}
								} else if (res.length === 2 || res.length === 1) {
									res = '';
									lastSlash = i;
									dots = 0;
									continue;
								}
							}
						if (allowAboveRoot) {
							if (res.length > 0) res += '/..';else res = '..';
						}
					} else {
						if (res.length > 0) res += '/' + path.slice(lastSlash + 1, i);else res = path.slice(lastSlash + 1, i);
					}
				lastSlash = i;
				dots = 0;
			} else if (code === 46 /*.*/ && dots !== -1) {
			++dots;
		} else {
			dots = -1;
		}
	}
	return res;
}

function _format(sep, pathObject) {
	var dir = pathObject.dir || pathObject.root;
	var base = pathObject.base || (pathObject.name || '') + (pathObject.ext || '');
	if (!dir) {
		return base;
	}
	if (dir === pathObject.root) {
		return dir + base;
	}
	return dir + sep + base;
}

var win32 = {
	// path.resolve([from ...], to)
	resolve: function resolve() {
		var resolvedDevice = '';
		var resolvedTail = '';
		var 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
				// a 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 === undefined || path.slice(0, 3).toLowerCase() !== resolvedDevice.toLowerCase() + '\\') {
					path = resolvedDevice + '\\';
				}
			}

			assertPath(path);

			// Skip empty entries
			if (path.length === 0) {
				continue;
			}

			var len = path.length;
			var rootEnd = 0;
			var code = path.charCodeAt(0);
			var device = '';
			var isAbsolute = false;

			// Try to match a root
			if (len > 1) {
				if (code === 47 /*/*/ || code === 92 /*\*/) {
						// Possible UNC root

						// If we started with a separator, we know we at least have an
						// absolute path of some kind (UNC or otherwise)
						isAbsolute = true;

						code = path.charCodeAt(1);
						if (code === 47 /*/*/ || code === 92 /*\*/) {
								// Matched double path separator at beginning
								var j = 2;
								var last = j;
								// Match 1 or more non-path separators
								for (; j < len; ++j) {
									code = path.charCodeAt(j);
									if (code === 47 /*/*/ || code === 92 /*\*/) break;
								}
								if (j < len && j !== last) {
									var firstPart = path.slice(last, j);
									// Matched!
									last = j;
									// Match 1 or more path separators
									for (; j < len; ++j) {
										code = path.charCodeAt(j);
										if (code !== 47 /*/*/ && code !== 92 /*\*/) break;
									}
									if (j < len && j !== last) {
										// Matched!
										last = j;
										// Match 1 or more non-path separators
										for (; j < len; ++j) {
											code = path.charCodeAt(j);
											if (code === 47 /*/*/ || code === 92 /*\*/) break;
										}
										if (j === len) {
											// We matched a UNC root only

											device = '\\\\' + firstPart + '\\' + path.slice(last);
											rootEnd = j;
										} else if (j !== last) {
											// We matched a UNC root with leftovers

											device = '\\\\' + firstPart + '\\' + path.slice(last, j);
											rootEnd = j;
										}
									}
								}
							} else {
							rootEnd = 1;
						}
					} else if (code >= 65 /*A*/ && code <= 90 /*Z*/ || code >= 97 /*a*/ && code <= 122 /*z*/) {
						// Possible device root

						code = path.charCodeAt(1);
						if (path.charCodeAt(1) === 58 /*:*/) {
								device = path.slice(0, 2);
								rootEnd = 2;
								if (len > 2) {
									code = path.charCodeAt(2);
									if (code === 47 /*/*/ || code === 92 /*\*/) {
											// Treat separator following drive name as an absolute path
											// indicator
											isAbsolute = true;
											rootEnd = 3;
										}
								}
							}
					}
			} else if (code === 47 /*/*/ || code === 92 /*\*/) {
					// `path` contains just a path separator
					rootEnd = 1;
					isAbsolute = true;
				}

			if (device.length > 0 && resolvedDevice.length > 0 && device.toLowerCase() !== resolvedDevice.toLowerCase()) {
				// This path points to another device so it is not applicable
				continue;
			}

			if (resolvedDevice.length === 0 && device.length > 0) {
				resolvedDevice = device;
			}
			if (!resolvedAbsolute) {
				resolvedTail = path.slice(rootEnd) + '\\' + resolvedTail;
				resolvedAbsolute = isAbsolute;
			}

			if (resolvedDevice.length > 0 && resolvedAbsolute) {
				break;
			}
		}

		// 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 = normalizeStringWin32(resolvedTail, !resolvedAbsolute);

		return resolvedDevice + (resolvedAbsolute ? '\\' : '') + resolvedTail || '.';
	},

	normalize: function normalize(path) {
		assertPath(path);
		var len = path.length;
		if (len === 0) return '.';
		var rootEnd = 0;
		var code = path.charCodeAt(0);
		var device;
		var isAbsolute = false;

		// Try to match a root
		if (len > 1) {
			if (code === 47 /*/*/ || code === 92 /*\*/) {
					// Possible UNC root

					// If we started with a separator, we know we at least have an absolute
					// path of some kind (UNC or otherwise)
					isAbsolute = true;

					code = path.charCodeAt(1);
					if (code === 47 /*/*/ || code === 92 /*\*/) {
							// Matched double path separator at beginning
							var j = 2;
							var last = j;
							// Match 1 or more non-path separators
							for (; j < len; ++j) {
								code = path.charCodeAt(j);
								if (code === 47 /*/*/ || code === 92 /*\*/) break;
							}
							if (j < len && j !== last) {
								var firstPart = path.slice(last, j);
								// Matched!
								last = j;
								// Match 1 or more path separators
								for (; j < len; ++j) {
									code = path.charCodeAt(j);
									if (code !== 47 /*/*/ && code !== 92 /*\*/) break;
								}
								if (j < len && j !== last) {
									// Matched!
									last = j;
									// Match 1 or more non-path separators
									for (; j < len; ++j) {
										code = path.charCodeAt(j);
										if (code === 47 /*/*/ || code === 92 /*\*/) break;
									}
									if (j === len) {
										// We matched a UNC root only
										// Return the normalized version of the UNC root since there
										// is nothing left to process

										return '\\\\' + firstPart + '\\' + path.slice(last) + '\\';
									} else if (j !== last) {
										// We matched a UNC root with leftovers

										device = '\\\\' + firstPart + '\\' + path.slice(last, j);
										rootEnd = j;
									}
								}
							}
						} else {
						rootEnd = 1;
					}
				} else if (code >= 65 /*A*/ && code <= 90 /*Z*/ || code >= 97 /*a*/ && code <= 122 /*z*/) {
					// Possible device root

					code = path.charCodeAt(1);
					if (path.charCodeAt(1) === 58 /*:*/) {
							device = path.slice(0, 2);
							rootEnd = 2;
							if (len > 2) {
								code = path.charCodeAt(2);
								if (code === 47 /*/*/ || code === 92 /*\*/) {
										// Treat separator following drive name as an absolute path
										// indicator
										isAbsolute = true;
										rootEnd = 3;
									}
							}
						}
				}
		} else if (code === 47 /*/*/ || code === 92 /*\*/) {
				// `path` contains just a path separator, exit early to avoid unnecessary
				// work
				return '\\';
			}

		code = path.charCodeAt(len - 1);
		var trailingSeparator = code === 47 /*/*/ || code === 92 /*\*/;
		var tail;
		if (rootEnd < len) tail = normalizeStringWin32(path.slice(rootEnd), !isAbsolute);else tail = '';
		if (tail.length === 0 && !isAbsolute) tail = '.';
		if (tail.length > 0 && trailingSeparator) tail += '\\';
		if (device === undefined) {
			if (isAbsolute) {
				if (tail.length > 0) return '\\' + tail;else return '\\';
			} else if (tail.length > 0) {
				return tail;
			} else {
				return '';
			}
		} else {
			if (isAbsolute) {
				if (tail.length > 0) return device + '\\' + tail;else return device + '\\';
			} else if (tail.length > 0) {
				return device + tail;
			} else {
				return device;
			}
		}
	},

	isAbsolute: function isAbsolute(path) {
		assertPath(path);
		var len = path.length;
		if (len === 0) return false;
		var code = path.charCodeAt(0);
		if (code === 47 /*/*/ || code === 92 /*\*/) {
				return true;
			} else if (code >= 65 /*A*/ && code <= 90 /*Z*/ || code >= 97 /*a*/ && code <= 122 /*z*/) {
				// Possible device root

				if (len > 2 && path.charCodeAt(1) === 58 /*:*/) {
						code = path.charCodeAt(2);
						if (code === 47 /*/*/ || code === 92 /*\*/) return true;
					}
			}
		return false;
	},

	join: function join() {
		if (arguments.length === 0) return '.';

		var joined;
		var firstPart;
		for (var i = 0; i < arguments.length; ++i) {
			var arg = arguments[i];
			assertPath(arg);
			if (arg.length > 0) {
				if (joined === undefined) joined = firstPart = arg;else joined += '\\' + arg;
			}
		}

		if (joined === undefined) return '.';

		// 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\\')
		//var firstPart = paths[0];
		var needsReplace = true;
		var slashCount = 0;
		var code = firstPart.charCodeAt(0);
		if (code === 47 /*/*/ || code === 92 /*\*/) {
				++slashCount;
				var firstLen = firstPart.length;
				if (firstLen > 1) {
					code = firstPart.charCodeAt(1);
					if (code === 47 /*/*/ || code === 92 /*\*/) {
							++slashCount;
							if (firstLen > 2) {
								code = firstPart.charCodeAt(2);
								if (code === 47 /*/*/ || code === 92 /*\*/) ++slashCount;else {
									// We matched a UNC path in the first part
									needsReplace = false;
								}
							}
						}
				}
			}
		if (needsReplace) {
			// Find any more consecutive slashes we need to replace
			for (; slashCount < joined.length; ++slashCount) {
				code = joined.charCodeAt(slashCount);
				if (code !== 47 /*/*/ && code !== 92 /*\*/) break;
			}

			// Replace the slashes if needed
			if (slashCount >= 2) joined = '\\' + joined.slice(slashCount);
		}

		return win32.normalize(joined);
	},

	// 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'
	relative: function relative(from, to) {
		assertPath(from);
		assertPath(to);

		if (from === to) return '';

		var fromOrig = win32.resolve(from);
		var toOrig = win32.resolve(to);

		if (fromOrig === toOrig) return '';

		from = fromOrig.toLowerCase();
		to = toOrig.toLowerCase();

		if (from === to) return '';

		// Trim any leading backslashes
		var fromStart = 0;
		for (; fromStart < from.length; ++fromStart) {
			if (from.charCodeAt(fromStart) !== 92 /*\*/) break;
		}
		// Trim trailing backslashes (applicable to UNC paths only)
		var fromEnd = from.length;
		for (; fromEnd - 1 > fromStart; --fromEnd) {
			if (from.charCodeAt(fromEnd - 1) !== 92 /*\*/) break;
		}
		var fromLen = fromEnd - fromStart;

		// Trim any leading backslashes
		var toStart = 0;
		for (; toStart < to.length; ++toStart) {
			if (to.charCodeAt(toStart) !== 92 /*\*/) break;
		}
		// Trim trailing backslashes (applicable to UNC paths only)
		var toEnd = to.length;
		for (; toEnd - 1 > toStart; --toEnd) {
			if (to.charCodeAt(toEnd - 1) !== 92 /*\*/) break;
		}
		var toLen = toEnd - toStart;

		// Compare paths to find the longest common path from root
		var length = fromLen < toLen ? fromLen : toLen;
		var lastCommonSep = -1;
		var i = 0;
		for (; i <= length; ++i) {
			if (i === length) {
				if (toLen > length) {
					if (to.charCodeAt(toStart + i) === 92 /*\*/) {
							// We get here if `from` is the exact base path for `to`.
							// For example: from='C:\\foo\\bar'; to='C:\\foo\\bar\\baz'
							return toOrig.slice(toStart + i + 1);
						} else if (i === 2) {
						// We get here if `from` is the device root.
						// For example: from='C:\\'; to='C:\\foo'
						return toOrig.slice(toStart + i);
					}
				}
				if (fromLen > length) {
					if (from.charCodeAt(fromStart + i) === 92 /*\*/) {
							// We get here if `to` is the exact base path for `from`.
							// For example: from='C:\\foo\\bar'; to='C:\\foo'
							lastCommonSep = i;
						} else if (i === 2) {
						// We get here if `to` is the device root.
						// For example: from='C:\\foo\\bar'; to='C:\\'
						lastCommonSep = 3;
					}
				}
				break;
			}
			var fromCode = from.charCodeAt(fromStart + i);
			var toCode = to.charCodeAt(toStart + i);
			if (fromCode !== toCode) break;else if (fromCode === 92 /*\*/) lastCommonSep = i;
		}

		// We found a mismatch before the first common path separator was seen, so
		// return the original `to`.
		// TODO: do this just for device roots (and not UNC paths)?
		if (i !== length && lastCommonSep === -1) {
			if (toStart > 0) return toOrig.slice(toStart);else return toOrig;
		}

		var out = '';
		if (lastCommonSep === -1) lastCommonSep = 0;
		// Generate the relative path based on the path difference between `to` and
		// `from`
		for (i = fromStart + lastCommonSep + 1; i <= fromEnd; ++i) {
			if (i === fromEnd || from.charCodeAt(i) === 92 /*\*/) {
					if (out.length === 0) out += '..';else out += '\\..';
				}
		}

		// Lastly, append the rest of the destination (`to`) path that comes after
		// the common path parts
		if (out.length > 0) return out + toOrig.slice(toStart + lastCommonSep, toEnd);else {
			toStart += lastCommonSep;
			if (toOrig.charCodeAt(toStart) === 92 /*\*/) ++toStart;
			return toOrig.slice(toStart, toEnd);
		}
	},

	_makeLong: function _makeLong(path) {
		// Note: this will *probably* throw somewhere.
		if (typeof path !== 'string') return path;

		if (path.length === 0) {
			return '';
		}

		var resolvedPath = win32.resolve(path);

		if (resolvedPath.length >= 3) {
			var code = resolvedPath.charCodeAt(0);
			if (code === 92 /*\*/) {
					// Possible UNC root

					if (resolvedPath.charCodeAt(1) === 92 /*\*/) {
							code = resolvedPath.charCodeAt(2);
							if (code !== 63 /*?*/ && code !== 46 /*.*/) {
									// Matched non-long UNC root, convert the path to a long UNC path
									return '\\\\?\\UNC\\' + resolvedPath.slice(2);
								}
						}
				} else if (code >= 65 /*A*/ && code <= 90 /*Z*/ || code >= 97 /*a*/ && code <= 122 /*z*/) {
					// Possible device root

					if (resolvedPath.charCodeAt(1) === 58 /*:*/ && resolvedPath.charCodeAt(2) === 92 /*\*/) {
							// Matched device root, convert the path to a long UNC path
							return '\\\\?\\' + resolvedPath;
						}
				}
		}

		return path;
	},

	dirname: function dirname(path) {
		assertPath(path);
		var len = path.length;
		if (len === 0) return '.';
		var rootEnd = -1;
		var end = -1;
		var matchedSlash = true;
		var offset = 0;
		var code = path.charCodeAt(0);

		// Try to match a root
		if (len > 1) {
			if (code === 47 /*/*/ || code === 92 /*\*/) {
					// Possible UNC root

					rootEnd = offset = 1;

					code = path.charCodeAt(1);
					if (code === 47 /*/*/ || code === 92 /*\*/) {
							// Matched double path separator at beginning
							var j = 2;
							var last = j;
							// Match 1 or more non-path separators
							for (; j < len; ++j) {
								code = path.charCodeAt(j);
								if (code === 47 /*/*/ || code === 92 /*\*/) break;
							}
							if (j < len && j !== last) {
								// Matched!
								last = j;
								// Match 1 or more path separators
								for (; j < len; ++j) {
									code = path.charCodeAt(j);
									if (code !== 47 /*/*/ && code !== 92 /*\*/) break;
								}
								if (j < len && j !== last) {
									// Matched!
									last = j;
									// Match 1 or more non-path separators
									for (; j < len; ++j) {
										code = path.charCodeAt(j);
										if (code === 47 /*/*/ || code === 92 /*\*/) break;
									}
									if (j === len) {
										// We matched a UNC root only
										return path;
									}
									if (j !== last) {
										// We matched a UNC root with leftovers

										// Offset by 1 to include the separator after the UNC root to
										// treat it as a "normal root" on top of a (UNC) root
										rootEnd = offset = j + 1;
									}
								}
							}
						}
				} else if (code >= 65 /*A*/ && code <= 90 /*Z*/ || code >= 97 /*a*/ && code <= 122 /*z*/) {
					// Possible device root

					code = path.charCodeAt(1);
					if (path.charCodeAt(1) === 58 /*:*/) {
							rootEnd = offset = 2;
							if (len > 2) {
								code = path.charCodeAt(2);
								if (code === 47 /*/*/ || code === 92 /*\*/) rootEnd = offset = 3;
							}
						}
				}
		} else if (code === 47 /*/*/ || code === 92 /*\*/) {
				return path[0];
			}

		for (var i = len - 1; i >= offset; --i) {
			code = path.charCodeAt(i);
			if (code === 47 /*/*/ || code === 92 /*\*/) {
					if (!matchedSlash) {
						end = i;
						break;
					}
				} else {
				// We saw the first non-path separator
				matchedSlash = false;
			}
		}

		if (end === -1) {
			if (rootEnd === -1) return '.';else end = rootEnd;
		}
		return path.slice(0, end);
	},

	basename: function basename(path, ext) {
		if (ext !== undefined && typeof ext !== 'string') throw new TypeError('"ext" argument must be a string');
		assertPath(path);
		var start = 0;
		var end = -1;
		var matchedSlash = true;
		var i;

		// Check for a drive letter prefix so as not to mistake the following
		// path separator as an extra separator at the end of the path that can be
		// disregarded
		if (path.length >= 2) {
			var drive = path.charCodeAt(0);
			if (drive >= 65 /*A*/ && drive <= 90 /*Z*/ || drive >= 97 /*a*/ && drive <= 122 /*z*/) {
					if (path.charCodeAt(1) === 58 /*:*/) start = 2;
				}
		}

		if (ext !== undefined && ext.length > 0 && ext.length <= path.length) {
			if (ext.length === path.length && ext === path) return '';
			var extIdx = ext.length - 1;
			var firstNonSlashEnd = -1;
			for (i = path.length - 1; i >= start; --i) {
				var code = path.charCodeAt(i);
				if (code === 47 /*/*/ || code === 92 /*\*/) {
						// If we reached a path separator that was not part of a set of path
						// separators at the end of the string, stop now
						if (!matchedSlash) {
							start = i + 1;
							break;
						}
					} else {
					if (firstNonSlashEnd === -1) {
						// We saw the first non-path separator, remember this index in case
						// we need it if the extension ends up not matching
						matchedSlash = false;
						firstNonSlashEnd = i + 1;
					}
					if (extIdx >= 0) {
						// Try to match the explicit extension
						if (code === ext.charCodeAt(extIdx)) {
							if (--extIdx === -1) {
								// We matched the extension, so mark this as the end of our path
								// component
								end = i;
							}
						} else {
							// Extension does not match, so our result is the entire path
							// component
							extIdx = -1;
							end = firstNonSlashEnd;
						}
					}
				}
			}

			if (start === end) end = firstNonSlashEnd;else if (end === -1) end = path.length;
			return path.slice(start, end);
		} else {
			for (i = path.length - 1; i >= start; --i) {
				var _code = path.charCodeAt(i);
				if (_code === 47 /*/*/ || _code === 92 /*\*/) {
						// If we reached a path separator that was not part of a set of path
						// separators at the end of the string, stop now
						if (!matchedSlash) {
							start = i + 1;
							break;
						}
					} else if (end === -1) {
					// We saw the first non-path separator, mark this as the end of our
					// path component
					matchedSlash = false;
					end = i + 1;
				}
			}

			if (end === -1) return '';
			return path.slice(start, end);
		}
	},

	extname: function extname(path) {
		assertPath(path);
		var startDot = -1;
		var startPart = 0;
		var end = -1;
		var matchedSlash = true;
		// Track the state of characters (if any) we see before our first dot and
		// after any path separator we find
		var preDotState = 0;
		for (var i = path.length - 1; i >= 0; --i) {
			var code = path.charCodeAt(i);
			if (code === 47 /*/*/ || code === 92 /*\*/) {
					// If we reached a path separator that was not part of a set of path
					// separators at the end of the string, stop now
					if (!matchedSlash) {
						startPart = i + 1;
						break;
					}
					continue;
				}
			if (end === -1) {
				// We saw the first non-path separator, mark this as the end of our
				// extension
				matchedSlash = false;
				end = i + 1;
			}
			if (code === 46 /*.*/) {
					// If this is our first dot, mark it as the start of our extension
					if (startDot === -1) startDot = i;else if (preDotState !== 1) preDotState = 1;
				} else if (startDot !== -1) {
				// We saw a non-dot and non-path separator before our dot, so we should
				// have a good chance at having a non-empty extension
				preDotState = -1;
			}
		}

		if (startDot === -1 || end === -1 ||
		// We saw a non-dot character immediately before the dot
		preDotState === 0 ||
		// The (right-most) trimmed path component is exactly '..'
		preDotState === 1 && startDot === end - 1 && startDot === startPart + 1) {
			return '';
		}
		return path.slice(startDot, end);
	},

	format: function format(pathObject) {
		if (pathObject === null || (typeof pathObject === 'undefined' ? 'undefined' : _typeof(pathObject)) !== 'object') {
			throw new TypeError('Parameter "pathObject" must be an object, not ' + (typeof pathObject === 'undefined' ? 'undefined' : _typeof(pathObject)));
		}
		return _format('\\', pathObject);
	},

	parse: function parse(path) {
		assertPath(path);

		var ret = { root: '', dir: '', base: '', ext: '', name: '' };
		if (path.length === 0) return ret;

		var len = path.length;
		var rootEnd = 0;
		var code = path.charCodeAt(0);
		var isAbsolute = false;

		// Try to match a root
		if (len > 1) {
			if (code === 47 /*/*/ || code === 92 /*\*/) {
					// Possible UNC root

					isAbsolute = true;

					code = path.charCodeAt(1);
					rootEnd = 1;
					if (code === 47 /*/*/ || code === 92 /*\*/) {
							// Matched double path separator at beginning
							var j = 2;
							var last = j;
							// Match 1 or more non-path separators
							for (; j < len; ++j) {
								code = path.charCodeAt(j);
								if (code === 47 /*/*/ || code === 92 /*\*/) break;
							}
							if (j < len && j !== last) {
								// Matched!
								last = j;
								// Match 1 or more path separators
								for (; j < len; ++j) {
									code = path.charCodeAt(j);
									if (code !== 47 /*/*/ && code !== 92 /*\*/) break;
								}
								if (j < len && j !== last) {
									// Matched!
									last = j;
									// Match 1 or more non-path separators
									for (; j < len; ++j) {
										code = path.charCodeAt(j);
										if (code === 47 /*/*/ || code === 92 /*\*/) break;
									}
									if (j === len) {
										// We matched a UNC root only

										rootEnd = j;
									} else if (j !== last) {
										// We matched a UNC root with leftovers

										rootEnd = j + 1;
									}
								}
							}
						}
				} else if (code >= 65 /*A*/ && code <= 90 /*Z*/ || code >= 97 /*a*/ && code <= 122 /*z*/) {
					// Possible device root

					code = path.charCodeAt(1);
					if (path.charCodeAt(1) === 58 /*:*/) {
							rootEnd = 2;
							if (len > 2) {
								code = path.charCodeAt(2);
								if (code === 47 /*/*/ || code === 92 /*\*/) {
										if (len === 3) {
											// `path` contains just a drive root, exit early to avoid
											// unnecessary work
											ret.root = ret.dir = path.slice(0, 3);
											return ret;
										}
										isAbsolute = true;
										rootEnd = 3;
									}
							} else {
								// `path` contains just a drive root, exit early to avoid
								// unnecessary work
								ret.root = ret.dir = path.slice(0, 2);
								return ret;
							}
						}
				}
		} else if (code === 47 /*/*/ || code === 92 /*\*/) {
				// `path` contains just a path separator, exit early to avoid
				// unnecessary work
				ret.root = ret.dir = path[0];
				return ret;
			}

		if (rootEnd > 0) ret.root = path.slice(0, rootEnd);

		var startDot = -1;
		var startPart = 0;
		var end = -1;
		var matchedSlash = true;
		var i = path.length - 1;

		// Track the state of characters (if any) we see before our first dot and
		// after any path separator we find
		var preDotState = 0;

		// Get non-dir info
		for (; i >= rootEnd; --i) {
			code = path.charCodeAt(i);
			if (code === 47 /*/*/ || code === 92 /*\*/) {
					// If we reached a path separator that was not part of a set of path
					// separators at the end of the string, stop now
					if (!matchedSlash) {
						startPart = i + 1;
						break;
					}
					continue;
				}
			if (end === -1) {
				// We saw the first non-path separator, mark this as the end of our
				// extension
				matchedSlash = false;
				end = i + 1;
			}
			if (code === 46 /*.*/) {
					// If this is our first dot, mark it as the start of our extension
					if (startDot === -1) startDot = i;else if (preDotState !== 1) preDotState = 1;
				} else if (startDot !== -1) {
				// We saw a non-dot and non-path separator before our dot, so we should
				// have a good chance at having a non-empty extension
				preDotState = -1;
			}
		}

		if (startDot === -1 || end === -1 ||
		// We saw a non-dot character immediately before the dot
		preDotState === 0 ||
		// The (right-most) trimmed path component is exactly '..'
		preDotState === 1 && startDot === end - 1 && startDot === startPart + 1) {
			if (end !== -1) {
				if (startPart === 0 && isAbsolute) ret.base = ret.name = path.slice(rootEnd, end);else ret.base = ret.name = path.slice(startPart, end);
			}
		} else {
			if (startPart === 0 && isAbsolute) {
				ret.name = path.slice(rootEnd, startDot);
				ret.base = path.slice(rootEnd, end);
			} else {
				ret.name = path.slice(startPart, startDot);
				ret.base = path.slice(startPart, end);
			}
			ret.ext = path.slice(startDot, end);
		}

		if (startPart > 0) ret.dir = path.slice(0, startPart - 1);else if (isAbsolute) ret.dir = path.slice(0, rootEnd);

		return ret;
	},

	sep: '\\',
	delimiter: ';',
	win32: null,
	posix: null
};

var posix = {
	// path.resolve([from ...], to)
	resolve: function resolve() {
		var resolvedPath = '';
		var resolvedAbsolute = false;
		var cwd;

		for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
			var path;
			if (i >= 0) path = arguments[i];else {
				if (cwd === undefined) cwd = process.cwd();
				path = cwd;
			}

			assertPath(path);

			// Skip empty entries
			if (path.length === 0) {
				continue;
			}

			resolvedPath = path + '/' + resolvedPath;
			resolvedAbsolute = path.charCodeAt(0) === 47 /*/*/;
		}

		// 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 = normalizeStringPosix(resolvedPath, !resolvedAbsolute);

		if (resolvedAbsolute) {
			if (resolvedPath.length > 0) return '/' + resolvedPath;else return '/';
		} else if (resolvedPath.length > 0) {
			return resolvedPath;
		} else {
			return '.';
		}
	},

	normalize: function normalize(path) {
		assertPath(path);

		if (path.length === 0) return '.';

		var isAbsolute = path.charCodeAt(0) === 47 /*/*/;
		var trailingSeparator = path.charCodeAt(path.length - 1) === 47 /*/*/;

		// Normalize the path
		path = normalizeStringPosix(path, !isAbsolute);

		if (path.length === 0 && !isAbsolute) path = '.';
		if (path.length > 0 && trailingSeparator) path += '/';

		if (isAbsolute) return '/' + path;
		return path;
	},

	isAbsolute: function isAbsolute(path) {
		assertPath(path);
		return path.length > 0 && path.charCodeAt(0) === 47 /*/*/;
	},

	join: function join() {
		if (arguments.length === 0) return '.';
		var joined;
		for (var i = 0; i < arguments.length; ++i) {
			var arg = arguments[i];
			assertPath(arg);
			if (arg.length > 0) {
				if (joined === undefined) joined = arg;else joined += '/' + arg;
			}
		}
		if (joined === undefined) return '.';
		return posix.normalize(joined);
	},

	relative: function relative(from, to) {
		assertPath(from);
		assertPath(to);

		if (from === to) return '';

		from = posix.resolve(from);
		to = posix.resolve(to);

		if (from === to) return '';

		// Trim any leading backslashes
		var fromStart = 1;
		for (; fromStart < from.length; ++fromStart) {
			if (from.charCodeAt(fromStart) !== 47 /*/*/) break;
		}
		var fromEnd = from.length;
		var fromLen = fromEnd - fromStart;

		// Trim any leading backslashes
		var toStart = 1;
		for (; toStart < to.length; ++toStart) {
			if (to.charCodeAt(toStart) !== 47 /*/*/) break;
		}
		var toEnd = to.length;
		var toLen = toEnd - toStart;

		// Compare paths to find the longest common path from root
		var length = fromLen < toLen ? fromLen : toLen;
		var lastCommonSep = -1;
		var i = 0;
		for (; i <= length; ++i) {
			if (i === length) {
				if (toLen > length) {
					if (to.charCodeAt(toStart + i) === 47 /*/*/) {
							// We get here if `from` is the exact base path for `to`.
							// For example: from='/foo/bar'; to='/foo/bar/baz'
							return to.slice(toStart + i + 1);
						} else if (i === 0) {
						// We get here if `from` is the root
						// For example: from='/'; to='/foo'
						return to.slice(toStart + i);
					}
				} else if (fromLen > length) {
					if (from.charCodeAt(fromStart + i) === 47 /*/*/) {
							// We get here if `to` is the exact base path for `from`.
							// For example: from='/foo/bar/baz'; to='/foo/bar'
							lastCommonSep = i;
						} else if (i === 0) {
						// We get here if `to` is the root.
						// For example: from='/foo'; to='/'
						lastCommonSep = 0;
					}
				}
				break;
			}
			var fromCode = from.charCodeAt(fromStart + i);
			var toCode = to.charCodeAt(toStart + i);
			if (fromCode !== toCode) break;else if (fromCode === 47 /*/*/) lastCommonSep = i;
		}

		var out = '';
		// Generate the relative path based on the path difference between `to`
		// and `from`
		for (i = fromStart + lastCommonSep + 1; i <= fromEnd; ++i) {
			if (i === fromEnd || from.charCodeAt(i) === 47 /*/*/) {
					if (out.length === 0) out += '..';else out += '/..';
				}
		}

		// Lastly, append the rest of the destination (`to`) path that comes after
		// the common path parts
		if (out.length > 0) return out + to.slice(toStart + lastCommonSep);else {
			toStart += lastCommonSep;
			if (to.charCodeAt(toStart) === 47 /*/*/) ++toStart;
			return to.slice(toStart);
		}
	},

	_makeLong: function _makeLong(path) {
		return path;
	},

	dirname: function dirname(path) {
		assertPath(path);
		if (path.length === 0) return '.';
		var code = path.charCodeAt(0);
		var hasRoot = code === 47 /*/*/;
		var end = -1;
		var matchedSlash = true;
		for (var i = path.length - 1; i >= 1; --i) {
			code = path.charCodeAt(i);
			if (code === 47 /*/*/) {
					if (!matchedSlash) {
						end = i;
						break;
					}
				} else {
				// We saw the first non-path separator
				matchedSlash = false;
			}
		}

		if (end === -1) return hasRoot ? '/' : '.';
		if (hasRoot && end === 1) return '//';
		return path.slice(0, end);
	},

	basename: function basename(path, ext) {
		if (ext !== undefined && typeof ext !== 'string') throw new TypeError('"ext" argument must be a string');
		assertPath(path);

		var start = 0;
		var end = -1;
		var matchedSlash = true;
		var i;

		if (ext !== undefined && ext.length > 0 && ext.length <= path.length) {
			if (ext.length === path.length && ext === path) return '';
			var extIdx = ext.length - 1;
			var firstNonSlashEnd = -1;
			for (i = path.length - 1; i >= 0; --i) {
				var code = path.charCodeAt(i);
				if (code === 47 /*/*/) {
						// If we reached a path separator that was not part of a set of path
						// separators at the end of the string, stop now
						if (!matchedSlash) {
							start = i + 1;
							break;
						}
					} else {
					if (firstNonSlashEnd === -1) {
						// We saw the first non-path separator, remember this index in case
						// we need it if the extension ends up not matching
						matchedSlash = false;
						firstNonSlashEnd = i + 1;
					}
					if (extIdx >= 0) {
						// Try to match the explicit extension
						if (code === ext.charCodeAt(extIdx)) {
							if (--extIdx === -1) {
								// We matched the extension, so mark this as the end of our path
								// component
								end = i;
							}
						} else {
							// Extension does not match, so our result is the entire path
							// component
							extIdx = -1;
							end = firstNonSlashEnd;
						}
					}
				}
			}

			if (start === end) end = firstNonSlashEnd;else if (end === -1) end = path.length;
			return path.slice(start, end);
		} else {
			for (i = path.length - 1; i >= 0; --i) {
				if (path.charCodeAt(i) === 47 /*/*/) {
						// If we reached a path separator that was not part of a set of path
						// separators at the end of the string, stop now
						if (!matchedSlash) {
							start = i + 1;
							break;
						}
					} else if (end === -1) {
					// We saw the first non-path separator, mark this as the end of our
					// path component
					matchedSlash = false;
					end = i + 1;
				}
			}

			if (end === -1) return '';
			return path.slice(start, end);
		}
	},

	extname: function extname(path) {
		assertPath(path);
		var startDot = -1;
		var startPart = 0;
		var end = -1;
		var matchedSlash = true;
		// Track the state of characters (if any) we see before our first dot and
		// after any path separator we find
		var preDotState = 0;
		for (var i = path.length - 1; i >= 0; --i) {
			var code = path.charCodeAt(i);
			if (code === 47 /*/*/) {
					// If we reached a path separator that was not part of a set of path
					// separators at the end of the string, stop now
					if (!matchedSlash) {
						startPart = i + 1;
						break;
					}
					continue;
				}
			if (end === -1) {
				// We saw the first non-path separator, mark this as the end of our
				// extension
				matchedSlash = false;
				end = i + 1;
			}
			if (code === 46 /*.*/) {
					// If this is our first dot, mark it as the start of our extension
					if (startDot === -1) startDot = i;else if (preDotState !== 1) preDotState = 1;
				} else if (startDot !== -1) {
				// We saw a non-dot and non-path separator before our dot, so we should
				// have a good chance at having a non-empty extension
				preDotState = -1;
			}
		}

		if (startDot === -1 || end === -1 ||
		// We saw a non-dot character immediately before the dot
		preDotState === 0 ||
		// The (right-most) trimmed path component is exactly '..'
		preDotState === 1 && startDot === end - 1 && startDot === startPart + 1) {
			return '';
		}
		return path.slice(startDot, end);
	},

	format: function format(pathObject) {
		if (pathObject === null || (typeof pathObject === 'undefined' ? 'undefined' : _typeof(pathObject)) !== 'object') {
			throw new TypeError('Parameter "pathObject" must be an object, not ' + (typeof pathObject === 'undefined' ? 'undefined' : _typeof(pathObject)));
		}
		return _format('/', pathObject);
	},

	parse: function parse(path) {
		assertPath(path);

		var ret = { root: '', dir: '', base: '', ext: '', name: '' };
		if (path.length === 0) return ret;
		var code = path.charCodeAt(0);
		var isAbsolute = code === 47 /*/*/;
		var start;
		if (isAbsolute) {
			ret.root = '/';
			start = 1;
		} else {
			start = 0;
		}
		var startDot = -1;
		var startPart = 0;
		var end = -1;
		var matchedSlash = true;
		var i = path.length - 1;

		// Track the state of characters (if any) we see before our first dot and
		// after any path separator we find
		var preDotState = 0;

		// Get non-dir info
		for (; i >= start; --i) {
			code = path.charCodeAt(i);
			if (code === 47 /*/*/) {
					// If we reached a path separator that was not part of a set of path
					// separators at the end of the string, stop now
					if (!matchedSlash) {
						startPart = i + 1;
						break;
					}
					continue;
				}
			if (end === -1) {
				// We saw the first non-path separator, mark this as the end of our
				// extension
				matchedSlash = false;
				end = i + 1;
			}
			if (code === 46 /*.*/) {
					// If this is our first dot, mark it as the start of our extension
					if (startDot === -1) startDot = i;else if (preDotState !== 1) preDotState = 1;
				} else if (startDot !== -1) {
				// We saw a non-dot and non-path separator before our dot, so we should
				// have a good chance at having a non-empty extension
				preDotState = -1;
			}
		}

		if (startDot === -1 || end === -1 ||
		// We saw a non-dot character immediately before the dot
		preDotState === 0 ||
		// The (right-most) trimmed path component is exactly '..'
		preDotState === 1 && startDot === end - 1 && startDot === startPart + 1) {
			if (end !== -1) {
				if (startPart === 0 && isAbsolute) ret.base = ret.name = path.slice(1, end);else ret.base = ret.name = path.slice(startPart, end);
			}
		} else {
			if (startPart === 0 && isAbsolute) {
				ret.name = path.slice(1, startDot);
				ret.base = path.slice(1, end);
			} else {
				ret.name = path.slice(startPart, startDot);
				ret.base = path.slice(startPart, end);
			}
			ret.ext = path.slice(startDot, end);
		}

		if (startPart > 0) ret.dir = path.slice(0, startPart - 1);else if (isAbsolute) ret.dir = '/';

		return ret;
	},

	sep: '/',
	delimiter: ':',
	win32: null,
	posix: null
};

posix.win32 = win32.win32 = win32;
posix.posix = win32.posix = posix;

if (process.platform === 'win32') module.exports = win32;else module.exports = posix;