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std/path/win32.ts

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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.// Copyright the Browserify authors. MIT License.// Ported from https://github.com/browserify/path-browserify/// This module is browser compatible.
import type { FormatInputPathObject, ParsedPath } from "./_interface.ts";import { CHAR_BACKWARD_SLASH, CHAR_COLON, CHAR_DOT, CHAR_QUESTION_MARK,} from "./_constants.ts";
import { _format, assertPath, encodeWhitespace, isPathSeparator, isWindowsDeviceRoot, normalizeString,} from "./_util.ts";import { assert } from "../_util/assert.ts";
export const sep = "\\";export const delimiter = ";";
/** * Resolves path segments into a `path` * @param pathSegments to process to path */export function resolve(...pathSegments: string[]): string { let resolvedDevice = ""; let resolvedTail = ""; let resolvedAbsolute = false;
for (let i = pathSegments.length - 1; i >= -1; i--) { let path: string; // deno-lint-ignore no-explicit-any const { Deno } = globalThis as any; if (i >= 0) { path = pathSegments[i]; } else if (!resolvedDevice) { if (typeof Deno?.cwd !== "function") { throw new TypeError("Resolved a drive-letter-less path without a CWD."); } path = Deno.cwd(); } else { if ( typeof Deno?.env?.get !== "function" || typeof Deno?.cwd !== "function" ) { throw new TypeError("Resolved a relative path without a CWD."); } path = Deno.cwd();
// Verify that a 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);
const len = path.length;
// Skip empty entries if (len === 0) continue;
let rootEnd = 0; let device = ""; let isAbsolute = false; const code = path.charCodeAt(0);
// Try to match a root if (len > 1) { if (isPathSeparator(code)) { // 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;
if (isPathSeparator(path.charCodeAt(1))) { // Matched double path separator at beginning let j = 2; let last = j; // Match 1 or more non-path separators for (; j < len; ++j) { if (isPathSeparator(path.charCodeAt(j))) break; } if (j < len && j !== last) { const firstPart = path.slice(last, j); // Matched! last = j; // Match 1 or more path separators for (; j < len; ++j) { if (!isPathSeparator(path.charCodeAt(j))) break; } if (j < len && j !== last) { // Matched! last = j; // Match 1 or more non-path separators for (; j < len; ++j) { if (isPathSeparator(path.charCodeAt(j))) 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 (isWindowsDeviceRoot(code)) { // Possible device root
if (path.charCodeAt(1) === CHAR_COLON) { device = path.slice(0, 2); rootEnd = 2; if (len > 2) { if (isPathSeparator(path.charCodeAt(2))) { // Treat separator following drive name as an absolute path // indicator isAbsolute = true; rootEnd = 3; } } } } } else if (isPathSeparator(code)) { // `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 (resolvedAbsolute && resolvedDevice.length > 0) 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 = normalizeString( resolvedTail, !resolvedAbsolute, "\\", isPathSeparator, );
return resolvedDevice + (resolvedAbsolute ? "\\" : "") + resolvedTail || ".";}
/** * Normalizes a `path` * @param path to normalize */export function normalize(path: string): string { assertPath(path); const len = path.length; if (len === 0) return "."; let rootEnd = 0; let device: string | undefined; let isAbsolute = false; const code = path.charCodeAt(0);
// Try to match a root if (len > 1) { if (isPathSeparator(code)) { // 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;
if (isPathSeparator(path.charCodeAt(1))) { // Matched double path separator at beginning let j = 2; let last = j; // Match 1 or more non-path separators for (; j < len; ++j) { if (isPathSeparator(path.charCodeAt(j))) break; } if (j < len && j !== last) { const firstPart = path.slice(last, j); // Matched! last = j; // Match 1 or more path separators for (; j < len; ++j) { if (!isPathSeparator(path.charCodeAt(j))) break; } if (j < len && j !== last) { // Matched! last = j; // Match 1 or more non-path separators for (; j < len; ++j) { if (isPathSeparator(path.charCodeAt(j))) 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 (isWindowsDeviceRoot(code)) { // Possible device root
if (path.charCodeAt(1) === CHAR_COLON) { device = path.slice(0, 2); rootEnd = 2; if (len > 2) { if (isPathSeparator(path.charCodeAt(2))) { // Treat separator following drive name as an absolute path // indicator isAbsolute = true; rootEnd = 3; } } } } } else if (isPathSeparator(code)) { // `path` contains just a path separator, exit early to avoid unnecessary // work return "\\"; }
let tail: string; if (rootEnd < len) { tail = normalizeString( path.slice(rootEnd), !isAbsolute, "\\", isPathSeparator, ); } else { tail = ""; } if (tail.length === 0 && !isAbsolute) tail = "."; if (tail.length > 0 && isPathSeparator(path.charCodeAt(len - 1))) { 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 `${device}\\`; } else if (tail.length > 0) { return device + tail; } else { return device; }}
/** * Verifies whether path is absolute * @param path to verify */export function isAbsolute(path: string): boolean { assertPath(path); const len = path.length; if (len === 0) return false;
const code = path.charCodeAt(0); if (isPathSeparator(code)) { return true; } else if (isWindowsDeviceRoot(code)) { // Possible device root
if (len > 2 && path.charCodeAt(1) === CHAR_COLON) { if (isPathSeparator(path.charCodeAt(2))) return true; } } return false;}
/** * Join all given a sequence of `paths`,then normalizes the resulting path. * @param paths to be joined and normalized */export function join(...paths: string[]): string { const pathsCount = paths.length; if (pathsCount === 0) return ".";
let joined: string | undefined; let firstPart: string | null = null; for (let i = 0; i < pathsCount; ++i) { const path = paths[i]; assertPath(path); if (path.length > 0) { if (joined === undefined) joined = firstPart = path; else joined += `\\${path}`; } }
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\\') let needsReplace = true; let slashCount = 0; assert(firstPart != null); if (isPathSeparator(firstPart.charCodeAt(0))) { ++slashCount; const firstLen = firstPart.length; if (firstLen > 1) { if (isPathSeparator(firstPart.charCodeAt(1))) { ++slashCount; if (firstLen > 2) { if (isPathSeparator(firstPart.charCodeAt(2))) ++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) { if (!isPathSeparator(joined.charCodeAt(slashCount))) break; }
// Replace the slashes if needed if (slashCount >= 2) joined = `\\${joined.slice(slashCount)}`; }
return 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' * @param from relative path * @param to relative path */export function relative(from: string, to: string): string { assertPath(from); assertPath(to);
if (from === to) return "";
const fromOrig = resolve(from); const toOrig = resolve(to);
if (fromOrig === toOrig) return "";
from = fromOrig.toLowerCase(); to = toOrig.toLowerCase();
if (from === to) return "";
// Trim any leading backslashes let fromStart = 0; let fromEnd = from.length; for (; fromStart < fromEnd; ++fromStart) { if (from.charCodeAt(fromStart) !== CHAR_BACKWARD_SLASH) break; } // Trim trailing backslashes (applicable to UNC paths only) for (; fromEnd - 1 > fromStart; --fromEnd) { if (from.charCodeAt(fromEnd - 1) !== CHAR_BACKWARD_SLASH) break; } const fromLen = fromEnd - fromStart;
// Trim any leading backslashes let toStart = 0; let toEnd = to.length; for (; toStart < toEnd; ++toStart) { if (to.charCodeAt(toStart) !== CHAR_BACKWARD_SLASH) break; } // Trim trailing backslashes (applicable to UNC paths only) for (; toEnd - 1 > toStart; --toEnd) { if (to.charCodeAt(toEnd - 1) !== CHAR_BACKWARD_SLASH) break; } const toLen = toEnd - toStart;
// Compare paths to find the longest common path from root const length = fromLen < toLen ? fromLen : toLen; let lastCommonSep = -1; let i = 0; for (; i <= length; ++i) { if (i === length) { if (toLen > length) { if (to.charCodeAt(toStart + i) === CHAR_BACKWARD_SLASH) { // 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) === CHAR_BACKWARD_SLASH) { // 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; } const fromCode = from.charCodeAt(fromStart + i); const toCode = to.charCodeAt(toStart + i); if (fromCode !== toCode) break; else if (fromCode === CHAR_BACKWARD_SLASH) lastCommonSep = i; }
// We found a mismatch before the first common path separator was seen, so // return the original `to`. if (i !== length && lastCommonSep === -1) { return toOrig; }
let 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) === CHAR_BACKWARD_SLASH) { 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) === CHAR_BACKWARD_SLASH) ++toStart; return toOrig.slice(toStart, toEnd); }}
/** * Resolves path to a namespace path * @param path to resolve to namespace */export function toNamespacedPath(path: string): string { // Note: this will *probably* throw somewhere. if (typeof path !== "string") return path; if (path.length === 0) return "";
const resolvedPath = resolve(path);
if (resolvedPath.length >= 3) { if (resolvedPath.charCodeAt(0) === CHAR_BACKWARD_SLASH) { // Possible UNC root
if (resolvedPath.charCodeAt(1) === CHAR_BACKWARD_SLASH) { const code = resolvedPath.charCodeAt(2); if (code !== CHAR_QUESTION_MARK && code !== CHAR_DOT) { // Matched non-long UNC root, convert the path to a long UNC path return `\\\\?\\UNC\\${resolvedPath.slice(2)}`; } } } else if (isWindowsDeviceRoot(resolvedPath.charCodeAt(0))) { // Possible device root
if ( resolvedPath.charCodeAt(1) === CHAR_COLON && resolvedPath.charCodeAt(2) === CHAR_BACKWARD_SLASH ) { // Matched device root, convert the path to a long UNC path return `\\\\?\\${resolvedPath}`; } } }
return path;}
/** * Return the directory name of a `path`. * @param path to determine name for */export function dirname(path: string): string { assertPath(path); const len = path.length; if (len === 0) return "."; let rootEnd = -1; let end = -1; let matchedSlash = true; let offset = 0; const code = path.charCodeAt(0);
// Try to match a root if (len > 1) { if (isPathSeparator(code)) { // Possible UNC root
rootEnd = offset = 1;
if (isPathSeparator(path.charCodeAt(1))) { // Matched double path separator at beginning let j = 2; let last = j; // Match 1 or more non-path separators for (; j < len; ++j) { if (isPathSeparator(path.charCodeAt(j))) break; } if (j < len && j !== last) { // Matched! last = j; // Match 1 or more path separators for (; j < len; ++j) { if (!isPathSeparator(path.charCodeAt(j))) break; } if (j < len && j !== last) { // Matched! last = j; // Match 1 or more non-path separators for (; j < len; ++j) { if (isPathSeparator(path.charCodeAt(j))) 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 (isWindowsDeviceRoot(code)) { // Possible device root
if (path.charCodeAt(1) === CHAR_COLON) { rootEnd = offset = 2; if (len > 2) { if (isPathSeparator(path.charCodeAt(2))) rootEnd = offset = 3; } } } } else if (isPathSeparator(code)) { // `path` contains just a path separator, exit early to avoid // unnecessary work return path; }
for (let i = len - 1; i >= offset; --i) { if (isPathSeparator(path.charCodeAt(i))) { 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);}
/** * Return the last portion of a `path`. Trailing directory separators are ignored. * @param path to process * @param ext of path directory */export function basename(path: string, ext = ""): string { if (ext !== undefined && typeof ext !== "string") { throw new TypeError('"ext" argument must be a string'); }
assertPath(path);
let start = 0; let end = -1; let matchedSlash = true; let i: number;
// 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) { const drive = path.charCodeAt(0); if (isWindowsDeviceRoot(drive)) { if (path.charCodeAt(1) === CHAR_COLON) start = 2; } }
if (ext !== undefined && ext.length > 0 && ext.length <= path.length) { if (ext.length === path.length && ext === path) return ""; let extIdx = ext.length - 1; let firstNonSlashEnd = -1; for (i = path.length - 1; i >= start; --i) { const code = path.charCodeAt(i); if (isPathSeparator(code)) { // 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) { if (isPathSeparator(path.charCodeAt(i))) { // 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); }}
/** * Return the extension of the `path` with leading period. * @param path with extension * @returns extension (ex. for `file.ts` returns `.ts`) */export function extname(path: string): string { assertPath(path); let start = 0; let startDot = -1; let startPart = 0; let end = -1; let matchedSlash = true; // Track the state of characters (if any) we see before our first dot and // after any path separator we find let preDotState = 0;
// 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 && path.charCodeAt(1) === CHAR_COLON && isWindowsDeviceRoot(path.charCodeAt(0)) ) { start = startPart = 2; }
for (let i = path.length - 1; i >= start; --i) { const code = path.charCodeAt(i); if (isPathSeparator(code)) { // 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 === CHAR_DOT) { // 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);}
/** * Generate a path from `FormatInputPathObject` object. * @param pathObject with path */export function format(pathObject: FormatInputPathObject): string { if (pathObject === null || typeof pathObject !== "object") { throw new TypeError( `The "pathObject" argument must be of type Object. Received type ${typeof pathObject}`, ); } return _format("\\", pathObject);}
/** * Return a `ParsedPath` object of the `path`. * @param path to process */export function parse(path: string): ParsedPath { assertPath(path);
const ret: ParsedPath = { root: "", dir: "", base: "", ext: "", name: "" };
const len = path.length; if (len === 0) return ret;
let rootEnd = 0; let code = path.charCodeAt(0);
// Try to match a root if (len > 1) { if (isPathSeparator(code)) { // Possible UNC root
rootEnd = 1; if (isPathSeparator(path.charCodeAt(1))) { // Matched double path separator at beginning let j = 2; let last = j; // Match 1 or more non-path separators for (; j < len; ++j) { if (isPathSeparator(path.charCodeAt(j))) break; } if (j < len && j !== last) { // Matched! last = j; // Match 1 or more path separators for (; j < len; ++j) { if (!isPathSeparator(path.charCodeAt(j))) break; } if (j < len && j !== last) { // Matched! last = j; // Match 1 or more non-path separators for (; j < len; ++j) { if (isPathSeparator(path.charCodeAt(j))) 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 (isWindowsDeviceRoot(code)) { // Possible device root
if (path.charCodeAt(1) === CHAR_COLON) { rootEnd = 2; if (len > 2) { if (isPathSeparator(path.charCodeAt(2))) { if (len === 3) { // `path` contains just a drive root, exit early to avoid // unnecessary work ret.root = ret.dir = path; return ret; } rootEnd = 3; } } else { // `path` contains just a drive root, exit early to avoid // unnecessary work ret.root = ret.dir = path; return ret; } } } } else if (isPathSeparator(code)) { // `path` contains just a path separator, exit early to avoid // unnecessary work ret.root = ret.dir = path; return ret; }
if (rootEnd > 0) ret.root = path.slice(0, rootEnd);
let startDot = -1; let startPart = rootEnd; let end = -1; let matchedSlash = true; let i = path.length - 1;
// Track the state of characters (if any) we see before our first dot and // after any path separator we find let preDotState = 0;
// Get non-dir info for (; i >= rootEnd; --i) { code = path.charCodeAt(i); if (isPathSeparator(code)) { // 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 === CHAR_DOT) { // 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) { ret.base = ret.name = path.slice(startPart, end); } } else { ret.name = path.slice(startPart, startDot); ret.base = path.slice(startPart, end); ret.ext = path.slice(startDot, end); }
// If the directory is the root, use the entire root as the `dir` including // the trailing slash if any (`C:\abc` -> `C:\`). Otherwise, strip out the // trailing slash (`C:\abc\def` -> `C:\abc`). if (startPart > 0 && startPart !== rootEnd) { ret.dir = path.slice(0, startPart - 1); } else ret.dir = ret.root;
return ret;}
/** * Converts a file URL to a path string. * * ```ts * import { fromFileUrl } from "./win32.ts"; * fromFileUrl("file:///home/foo"); // "\\home\\foo" * fromFileUrl("file:///C:/Users/foo"); // "C:\\Users\\foo" * fromFileUrl("file://localhost/home/foo"); // "\\\\localhost\\home\\foo" * ``` * @param url of a file URL */export function fromFileUrl(url: string | URL): string { url = url instanceof URL ? url : new URL(url); if (url.protocol != "file:") { throw new TypeError("Must be a file URL."); } let path = decodeURIComponent( url.pathname.replace(/\//g, "\\").replace(/%(?![0-9A-Fa-f]{2})/g, "%25"), ).replace(/^\\*([A-Za-z]:)(\\|$)/, "$1\\"); if (url.hostname != "") { // Note: The `URL` implementation guarantees that the drive letter and // hostname are mutually exclusive. Otherwise it would not have been valid // to append the hostname and path like this. path = `\\\\${url.hostname}${path}`; } return path;}
/** * Converts a path string to a file URL. * * ```ts * import { toFileUrl } from "./win32.ts"; * toFileUrl("\\home\\foo"); // new URL("file:///home/foo") * toFileUrl("C:\\Users\\foo"); // new URL("file:///C:/Users/foo") * toFileUrl("\\\\127.0.0.1\\home\\foo"); // new URL("file://127.0.0.1/home/foo") * ``` * @param path to convert to file URL */export function toFileUrl(path: string): URL { if (!isAbsolute(path)) { throw new TypeError("Must be an absolute path."); } const [, hostname, pathname] = path.match( /^(?:[/\\]{2}([^/\\]+)(?=[/\\](?:[^/\\]|$)))?(.*)/, )!; const url = new URL("file:///"); url.pathname = encodeWhitespace(pathname.replace(/%/g, "%25")); if (hostname != null && hostname != "localhost") { url.hostname = hostname; if (!url.hostname) { throw new TypeError("Invalid hostname."); } } return url;}