530 lines
16 KiB
JavaScript
530 lines
16 KiB
JavaScript
// 'path' module extracted from Node.js v8.11.1 (only the posix part)
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// transplited with Babel
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// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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'use strict';
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function assertPath(path) {
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if (typeof path !== 'string') {
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throw new TypeError('Path must be a string. Received ' + JSON.stringify(path));
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}
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}
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// Resolves . and .. elements in a path with directory names
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function normalizeStringPosix(path, allowAboveRoot) {
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var res = '';
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var lastSegmentLength = 0;
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var lastSlash = -1;
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var dots = 0;
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var code;
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for (var i = 0; i <= path.length; ++i) {
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if (i < path.length)
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code = path.charCodeAt(i);
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else if (code === 47 /*/*/)
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break;
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else
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code = 47 /*/*/;
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if (code === 47 /*/*/) {
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if (lastSlash === i - 1 || dots === 1) {
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// NOOP
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} else if (lastSlash !== i - 1 && dots === 2) {
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if (res.length < 2 || lastSegmentLength !== 2 || res.charCodeAt(res.length - 1) !== 46 /*.*/ || res.charCodeAt(res.length - 2) !== 46 /*.*/) {
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if (res.length > 2) {
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var lastSlashIndex = res.lastIndexOf('/');
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if (lastSlashIndex !== res.length - 1) {
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if (lastSlashIndex === -1) {
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res = '';
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lastSegmentLength = 0;
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} else {
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res = res.slice(0, lastSlashIndex);
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lastSegmentLength = res.length - 1 - res.lastIndexOf('/');
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}
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lastSlash = i;
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dots = 0;
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continue;
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}
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} else if (res.length === 2 || res.length === 1) {
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res = '';
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lastSegmentLength = 0;
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lastSlash = i;
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dots = 0;
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continue;
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}
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}
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if (allowAboveRoot) {
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if (res.length > 0)
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res += '/..';
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else
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res = '..';
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lastSegmentLength = 2;
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}
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} else {
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if (res.length > 0)
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res += '/' + path.slice(lastSlash + 1, i);
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else
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res = path.slice(lastSlash + 1, i);
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lastSegmentLength = i - lastSlash - 1;
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}
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lastSlash = i;
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dots = 0;
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} else if (code === 46 /*.*/ && dots !== -1) {
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++dots;
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} else {
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dots = -1;
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}
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}
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return res;
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}
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function _format(sep, pathObject) {
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var dir = pathObject.dir || pathObject.root;
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var base = pathObject.base || (pathObject.name || '') + (pathObject.ext || '');
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if (!dir) {
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return base;
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}
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if (dir === pathObject.root) {
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return dir + base;
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}
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return dir + sep + base;
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}
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var posix = {
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// path.resolve([from ...], to)
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resolve: function resolve() {
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var resolvedPath = '';
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var resolvedAbsolute = false;
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var cwd;
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for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
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var path;
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if (i >= 0)
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path = arguments[i];
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else {
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if (cwd === undefined)
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cwd = process.cwd();
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path = cwd;
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}
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assertPath(path);
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// Skip empty entries
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if (path.length === 0) {
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continue;
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}
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resolvedPath = path + '/' + resolvedPath;
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resolvedAbsolute = path.charCodeAt(0) === 47 /*/*/;
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}
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// At this point the path should be resolved to a full absolute path, but
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// handle relative paths to be safe (might happen when process.cwd() fails)
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// Normalize the path
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resolvedPath = normalizeStringPosix(resolvedPath, !resolvedAbsolute);
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if (resolvedAbsolute) {
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if (resolvedPath.length > 0)
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return '/' + resolvedPath;
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else
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return '/';
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} else if (resolvedPath.length > 0) {
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return resolvedPath;
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} else {
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return '.';
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}
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},
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normalize: function normalize(path) {
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assertPath(path);
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if (path.length === 0) return '.';
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var isAbsolute = path.charCodeAt(0) === 47 /*/*/;
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var trailingSeparator = path.charCodeAt(path.length - 1) === 47 /*/*/;
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// Normalize the path
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path = normalizeStringPosix(path, !isAbsolute);
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if (path.length === 0 && !isAbsolute) path = '.';
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if (path.length > 0 && trailingSeparator) path += '/';
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if (isAbsolute) return '/' + path;
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return path;
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},
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isAbsolute: function isAbsolute(path) {
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assertPath(path);
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return path.length > 0 && path.charCodeAt(0) === 47 /*/*/;
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},
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join: function join() {
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if (arguments.length === 0)
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return '.';
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var joined;
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for (var i = 0; i < arguments.length; ++i) {
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var arg = arguments[i];
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assertPath(arg);
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if (arg.length > 0) {
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if (joined === undefined)
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joined = arg;
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else
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joined += '/' + arg;
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}
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}
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if (joined === undefined)
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return '.';
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return posix.normalize(joined);
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},
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relative: function relative(from, to) {
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assertPath(from);
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assertPath(to);
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if (from === to) return '';
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from = posix.resolve(from);
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to = posix.resolve(to);
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if (from === to) return '';
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// Trim any leading backslashes
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var fromStart = 1;
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for (; fromStart < from.length; ++fromStart) {
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if (from.charCodeAt(fromStart) !== 47 /*/*/)
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break;
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}
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var fromEnd = from.length;
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var fromLen = fromEnd - fromStart;
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// Trim any leading backslashes
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var toStart = 1;
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for (; toStart < to.length; ++toStart) {
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if (to.charCodeAt(toStart) !== 47 /*/*/)
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break;
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}
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var toEnd = to.length;
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var toLen = toEnd - toStart;
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// Compare paths to find the longest common path from root
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var length = fromLen < toLen ? fromLen : toLen;
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var lastCommonSep = -1;
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var i = 0;
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for (; i <= length; ++i) {
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if (i === length) {
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if (toLen > length) {
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if (to.charCodeAt(toStart + i) === 47 /*/*/) {
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// We get here if `from` is the exact base path for `to`.
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// For example: from='/foo/bar'; to='/foo/bar/baz'
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return to.slice(toStart + i + 1);
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} else if (i === 0) {
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// We get here if `from` is the root
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// For example: from='/'; to='/foo'
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return to.slice(toStart + i);
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}
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} else if (fromLen > length) {
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if (from.charCodeAt(fromStart + i) === 47 /*/*/) {
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// We get here if `to` is the exact base path for `from`.
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// For example: from='/foo/bar/baz'; to='/foo/bar'
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lastCommonSep = i;
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} else if (i === 0) {
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// We get here if `to` is the root.
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// For example: from='/foo'; to='/'
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lastCommonSep = 0;
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}
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}
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break;
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}
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var fromCode = from.charCodeAt(fromStart + i);
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var toCode = to.charCodeAt(toStart + i);
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if (fromCode !== toCode)
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break;
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else if (fromCode === 47 /*/*/)
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lastCommonSep = i;
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}
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var out = '';
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// Generate the relative path based on the path difference between `to`
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// and `from`
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for (i = fromStart + lastCommonSep + 1; i <= fromEnd; ++i) {
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if (i === fromEnd || from.charCodeAt(i) === 47 /*/*/) {
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if (out.length === 0)
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out += '..';
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else
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out += '/..';
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}
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}
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// Lastly, append the rest of the destination (`to`) path that comes after
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// the common path parts
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if (out.length > 0)
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return out + to.slice(toStart + lastCommonSep);
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else {
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toStart += lastCommonSep;
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if (to.charCodeAt(toStart) === 47 /*/*/)
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++toStart;
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return to.slice(toStart);
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}
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},
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_makeLong: function _makeLong(path) {
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return path;
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},
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dirname: function dirname(path) {
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assertPath(path);
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if (path.length === 0) return '.';
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var code = path.charCodeAt(0);
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var hasRoot = code === 47 /*/*/;
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var end = -1;
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var matchedSlash = true;
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for (var i = path.length - 1; i >= 1; --i) {
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code = path.charCodeAt(i);
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if (code === 47 /*/*/) {
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if (!matchedSlash) {
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end = i;
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break;
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}
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} else {
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// We saw the first non-path separator
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matchedSlash = false;
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}
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}
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if (end === -1) return hasRoot ? '/' : '.';
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if (hasRoot && end === 1) return '//';
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return path.slice(0, end);
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},
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basename: function basename(path, ext) {
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if (ext !== undefined && typeof ext !== 'string') throw new TypeError('"ext" argument must be a string');
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assertPath(path);
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var start = 0;
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var end = -1;
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var matchedSlash = true;
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var i;
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if (ext !== undefined && ext.length > 0 && ext.length <= path.length) {
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if (ext.length === path.length && ext === path) return '';
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var extIdx = ext.length - 1;
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var firstNonSlashEnd = -1;
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for (i = path.length - 1; i >= 0; --i) {
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var code = path.charCodeAt(i);
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if (code === 47 /*/*/) {
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// If we reached a path separator that was not part of a set of path
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// separators at the end of the string, stop now
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if (!matchedSlash) {
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start = i + 1;
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break;
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}
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} else {
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if (firstNonSlashEnd === -1) {
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// We saw the first non-path separator, remember this index in case
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// we need it if the extension ends up not matching
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matchedSlash = false;
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firstNonSlashEnd = i + 1;
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}
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if (extIdx >= 0) {
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// Try to match the explicit extension
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if (code === ext.charCodeAt(extIdx)) {
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if (--extIdx === -1) {
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// We matched the extension, so mark this as the end of our path
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// component
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end = i;
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}
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} else {
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// Extension does not match, so our result is the entire path
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// component
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extIdx = -1;
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end = firstNonSlashEnd;
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}
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}
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}
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}
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if (start === end) end = firstNonSlashEnd;else if (end === -1) end = path.length;
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return path.slice(start, end);
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} else {
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for (i = path.length - 1; i >= 0; --i) {
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if (path.charCodeAt(i) === 47 /*/*/) {
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// If we reached a path separator that was not part of a set of path
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// separators at the end of the string, stop now
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if (!matchedSlash) {
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start = i + 1;
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break;
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}
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} else if (end === -1) {
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// We saw the first non-path separator, mark this as the end of our
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// path component
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matchedSlash = false;
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end = i + 1;
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}
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}
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if (end === -1) return '';
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return path.slice(start, end);
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}
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},
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extname: function extname(path) {
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assertPath(path);
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var startDot = -1;
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var startPart = 0;
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var end = -1;
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var matchedSlash = true;
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// Track the state of characters (if any) we see before our first dot and
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// after any path separator we find
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var preDotState = 0;
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for (var i = path.length - 1; i >= 0; --i) {
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var code = path.charCodeAt(i);
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if (code === 47 /*/*/) {
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// If we reached a path separator that was not part of a set of path
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// separators at the end of the string, stop now
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if (!matchedSlash) {
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startPart = i + 1;
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break;
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}
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continue;
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}
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if (end === -1) {
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// We saw the first non-path separator, mark this as the end of our
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// extension
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matchedSlash = false;
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end = i + 1;
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}
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if (code === 46 /*.*/) {
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// If this is our first dot, mark it as the start of our extension
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if (startDot === -1)
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startDot = i;
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else if (preDotState !== 1)
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preDotState = 1;
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} else if (startDot !== -1) {
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// We saw a non-dot and non-path separator before our dot, so we should
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// have a good chance at having a non-empty extension
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preDotState = -1;
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}
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}
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if (startDot === -1 || end === -1 ||
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// We saw a non-dot character immediately before the dot
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preDotState === 0 ||
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// The (right-most) trimmed path component is exactly '..'
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preDotState === 1 && startDot === end - 1 && startDot === startPart + 1) {
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return '';
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}
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return path.slice(startDot, end);
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},
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format: function format(pathObject) {
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if (pathObject === null || typeof pathObject !== 'object') {
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throw new TypeError('The "pathObject" argument must be of type Object. Received type ' + typeof pathObject);
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}
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return _format('/', pathObject);
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},
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parse: function parse(path) {
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assertPath(path);
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var ret = { root: '', dir: '', base: '', ext: '', name: '' };
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if (path.length === 0) return ret;
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var code = path.charCodeAt(0);
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var isAbsolute = code === 47 /*/*/;
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var start;
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if (isAbsolute) {
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ret.root = '/';
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start = 1;
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} else {
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start = 0;
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}
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var startDot = -1;
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var startPart = 0;
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var end = -1;
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var matchedSlash = true;
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var i = path.length - 1;
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// Track the state of characters (if any) we see before our first dot and
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// after any path separator we find
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var preDotState = 0;
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// Get non-dir info
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for (; i >= start; --i) {
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code = path.charCodeAt(i);
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if (code === 47 /*/*/) {
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// If we reached a path separator that was not part of a set of path
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// separators at the end of the string, stop now
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if (!matchedSlash) {
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startPart = i + 1;
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break;
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}
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continue;
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}
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if (end === -1) {
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// We saw the first non-path separator, mark this as the end of our
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// extension
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matchedSlash = false;
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end = i + 1;
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}
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if (code === 46 /*.*/) {
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// If this is our first dot, mark it as the start of our extension
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if (startDot === -1) startDot = i;else if (preDotState !== 1) preDotState = 1;
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} else if (startDot !== -1) {
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// We saw a non-dot and non-path separator before our dot, so we should
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// have a good chance at having a non-empty extension
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preDotState = -1;
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}
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}
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if (startDot === -1 || end === -1 ||
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// We saw a non-dot character immediately before the dot
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preDotState === 0 ||
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// The (right-most) trimmed path component is exactly '..'
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preDotState === 1 && startDot === end - 1 && startDot === startPart + 1) {
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if (end !== -1) {
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if (startPart === 0 && isAbsolute) ret.base = ret.name = path.slice(1, end);else ret.base = ret.name = path.slice(startPart, end);
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}
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} else {
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if (startPart === 0 && isAbsolute) {
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ret.name = path.slice(1, startDot);
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ret.base = path.slice(1, end);
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} else {
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ret.name = path.slice(startPart, startDot);
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ret.base = path.slice(startPart, end);
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}
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ret.ext = path.slice(startDot, end);
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}
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if (startPart > 0) ret.dir = path.slice(0, startPart - 1);else if (isAbsolute) ret.dir = '/';
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return ret;
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},
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sep: '/',
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delimiter: ':',
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win32: null,
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posix: null
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};
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posix.posix = posix;
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module.exports = posix;
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