mirror of
https://github.com/denoland/deno.git
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920 lines
27 KiB
TypeScript
920 lines
27 KiB
TypeScript
// Copyright the Browserify authors. MIT License.
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// Ported from https://github.com/browserify/path-browserify/
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/** This module is browser compatible. */
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import { FormatInputPathObject, ParsedPath } from "./_interface.ts";
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import {
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CHAR_DOT,
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CHAR_BACKWARD_SLASH,
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CHAR_COLON,
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CHAR_QUESTION_MARK,
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} from "./_constants.ts";
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import {
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assertPath,
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isPathSeparator,
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isWindowsDeviceRoot,
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normalizeString,
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_format,
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} from "./_util.ts";
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import { assert } from "../_util/assert.ts";
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export const sep = "\\";
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export const delimiter = ";";
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export function resolve(...pathSegments: string[]): string {
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let resolvedDevice = "";
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let resolvedTail = "";
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let resolvedAbsolute = false;
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for (let i = pathSegments.length - 1; i >= -1; i--) {
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let path: string;
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if (i >= 0) {
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path = pathSegments[i];
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} else if (!resolvedDevice) {
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if (globalThis.Deno == null) {
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throw new TypeError("Resolved a drive-letter-less path without a CWD.");
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}
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path = Deno.cwd();
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} else {
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if (globalThis.Deno == null) {
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throw new TypeError("Resolved a relative path without a CWD.");
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}
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// Windows has the concept of drive-specific current working
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// directories. If we've resolved a drive letter but not yet an
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// absolute path, get cwd for that drive, or the process cwd if
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// the drive cwd is not available. We're sure the device is not
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// a UNC path at this points, because UNC paths are always absolute.
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path = Deno.env.get(`=${resolvedDevice}`) || Deno.cwd();
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// Verify that a cwd was found and that it actually points
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// to our drive. If not, default to the drive's root.
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if (
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path === undefined ||
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path.slice(0, 3).toLowerCase() !== `${resolvedDevice.toLowerCase()}\\`
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) {
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path = `${resolvedDevice}\\`;
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}
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}
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assertPath(path);
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const len = path.length;
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// Skip empty entries
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if (len === 0) continue;
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let rootEnd = 0;
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let device = "";
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let isAbsolute = false;
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const code = path.charCodeAt(0);
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// Try to match a root
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if (len > 1) {
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if (isPathSeparator(code)) {
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// Possible UNC root
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// If we started with a separator, we know we at least have an
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// absolute path of some kind (UNC or otherwise)
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isAbsolute = true;
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if (isPathSeparator(path.charCodeAt(1))) {
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// Matched double path separator at beginning
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let j = 2;
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let last = j;
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// Match 1 or more non-path separators
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for (; j < len; ++j) {
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if (isPathSeparator(path.charCodeAt(j))) break;
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}
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if (j < len && j !== last) {
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const firstPart = path.slice(last, j);
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// Matched!
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last = j;
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// Match 1 or more path separators
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for (; j < len; ++j) {
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if (!isPathSeparator(path.charCodeAt(j))) break;
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}
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if (j < len && j !== last) {
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// Matched!
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last = j;
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// Match 1 or more non-path separators
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for (; j < len; ++j) {
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if (isPathSeparator(path.charCodeAt(j))) break;
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}
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if (j === len) {
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// We matched a UNC root only
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device = `\\\\${firstPart}\\${path.slice(last)}`;
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rootEnd = j;
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} else if (j !== last) {
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// We matched a UNC root with leftovers
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device = `\\\\${firstPart}\\${path.slice(last, j)}`;
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rootEnd = j;
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}
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}
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}
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} else {
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rootEnd = 1;
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}
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} else if (isWindowsDeviceRoot(code)) {
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// Possible device root
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if (path.charCodeAt(1) === CHAR_COLON) {
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device = path.slice(0, 2);
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rootEnd = 2;
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if (len > 2) {
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if (isPathSeparator(path.charCodeAt(2))) {
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// Treat separator following drive name as an absolute path
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// indicator
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isAbsolute = true;
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rootEnd = 3;
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}
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}
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}
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}
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} else if (isPathSeparator(code)) {
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// `path` contains just a path separator
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rootEnd = 1;
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isAbsolute = true;
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}
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if (
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device.length > 0 &&
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resolvedDevice.length > 0 &&
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device.toLowerCase() !== resolvedDevice.toLowerCase()
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) {
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// This path points to another device so it is not applicable
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continue;
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}
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if (resolvedDevice.length === 0 && device.length > 0) {
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resolvedDevice = device;
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}
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if (!resolvedAbsolute) {
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resolvedTail = `${path.slice(rootEnd)}\\${resolvedTail}`;
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resolvedAbsolute = isAbsolute;
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}
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if (resolvedAbsolute && resolvedDevice.length > 0) break;
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}
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// At this point the path should be resolved to a full absolute path,
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// but handle relative paths to be safe (might happen when process.cwd()
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// fails)
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// Normalize the tail path
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resolvedTail = normalizeString(
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resolvedTail,
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!resolvedAbsolute,
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"\\",
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isPathSeparator
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);
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return resolvedDevice + (resolvedAbsolute ? "\\" : "") + resolvedTail || ".";
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}
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export function normalize(path: string): string {
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assertPath(path);
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const len = path.length;
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if (len === 0) return ".";
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let rootEnd = 0;
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let device: string | undefined;
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let isAbsolute = false;
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const code = path.charCodeAt(0);
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// Try to match a root
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if (len > 1) {
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if (isPathSeparator(code)) {
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// Possible UNC root
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// If we started with a separator, we know we at least have an absolute
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// path of some kind (UNC or otherwise)
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isAbsolute = true;
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if (isPathSeparator(path.charCodeAt(1))) {
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// Matched double path separator at beginning
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let j = 2;
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let last = j;
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// Match 1 or more non-path separators
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for (; j < len; ++j) {
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if (isPathSeparator(path.charCodeAt(j))) break;
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}
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if (j < len && j !== last) {
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const firstPart = path.slice(last, j);
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// Matched!
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last = j;
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// Match 1 or more path separators
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for (; j < len; ++j) {
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if (!isPathSeparator(path.charCodeAt(j))) break;
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}
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if (j < len && j !== last) {
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// Matched!
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last = j;
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// Match 1 or more non-path separators
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for (; j < len; ++j) {
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if (isPathSeparator(path.charCodeAt(j))) break;
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}
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if (j === len) {
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// We matched a UNC root only
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// Return the normalized version of the UNC root since there
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// is nothing left to process
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return `\\\\${firstPart}\\${path.slice(last)}\\`;
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} else if (j !== last) {
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// We matched a UNC root with leftovers
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device = `\\\\${firstPart}\\${path.slice(last, j)}`;
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rootEnd = j;
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}
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}
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}
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} else {
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rootEnd = 1;
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}
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} else if (isWindowsDeviceRoot(code)) {
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// Possible device root
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if (path.charCodeAt(1) === CHAR_COLON) {
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device = path.slice(0, 2);
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rootEnd = 2;
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if (len > 2) {
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if (isPathSeparator(path.charCodeAt(2))) {
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// Treat separator following drive name as an absolute path
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// indicator
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isAbsolute = true;
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rootEnd = 3;
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}
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}
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}
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}
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} else if (isPathSeparator(code)) {
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// `path` contains just a path separator, exit early to avoid unnecessary
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// work
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return "\\";
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}
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let tail: string;
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if (rootEnd < len) {
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tail = normalizeString(
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path.slice(rootEnd),
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!isAbsolute,
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"\\",
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isPathSeparator
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);
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} else {
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tail = "";
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}
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if (tail.length === 0 && !isAbsolute) tail = ".";
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if (tail.length > 0 && isPathSeparator(path.charCodeAt(len - 1))) {
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tail += "\\";
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}
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if (device === undefined) {
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if (isAbsolute) {
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if (tail.length > 0) return `\\${tail}`;
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else return "\\";
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} else if (tail.length > 0) {
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return tail;
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} else {
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return "";
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}
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} else if (isAbsolute) {
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if (tail.length > 0) return `${device}\\${tail}`;
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else return `${device}\\`;
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} else if (tail.length > 0) {
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return device + tail;
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} else {
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return device;
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}
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}
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export function isAbsolute(path: string): boolean {
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assertPath(path);
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const len = path.length;
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if (len === 0) return false;
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const code = path.charCodeAt(0);
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if (isPathSeparator(code)) {
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return true;
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} else if (isWindowsDeviceRoot(code)) {
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// Possible device root
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if (len > 2 && path.charCodeAt(1) === CHAR_COLON) {
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if (isPathSeparator(path.charCodeAt(2))) return true;
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}
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}
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return false;
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}
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export function join(...paths: string[]): string {
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const pathsCount = paths.length;
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if (pathsCount === 0) return ".";
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let joined: string | undefined;
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let firstPart: string | null = null;
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for (let i = 0; i < pathsCount; ++i) {
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const path = paths[i];
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assertPath(path);
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if (path.length > 0) {
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if (joined === undefined) joined = firstPart = path;
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else joined += `\\${path}`;
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}
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}
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if (joined === undefined) return ".";
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// Make sure that the joined path doesn't start with two slashes, because
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// normalize() will mistake it for an UNC path then.
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//
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// This step is skipped when it is very clear that the user actually
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// intended to point at an UNC path. This is assumed when the first
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// non-empty string arguments starts with exactly two slashes followed by
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// at least one more non-slash character.
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//
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// Note that for normalize() to treat a path as an UNC path it needs to
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// have at least 2 components, so we don't filter for that here.
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// This means that the user can use join to construct UNC paths from
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// a server name and a share name; for example:
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// path.join('//server', 'share') -> '\\\\server\\share\\')
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let needsReplace = true;
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let slashCount = 0;
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assert(firstPart != null);
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if (isPathSeparator(firstPart.charCodeAt(0))) {
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++slashCount;
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const firstLen = firstPart.length;
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if (firstLen > 1) {
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if (isPathSeparator(firstPart.charCodeAt(1))) {
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++slashCount;
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if (firstLen > 2) {
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if (isPathSeparator(firstPart.charCodeAt(2))) ++slashCount;
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else {
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// We matched a UNC path in the first part
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needsReplace = false;
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}
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}
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}
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}
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}
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if (needsReplace) {
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// Find any more consecutive slashes we need to replace
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for (; slashCount < joined.length; ++slashCount) {
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if (!isPathSeparator(joined.charCodeAt(slashCount))) break;
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}
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// Replace the slashes if needed
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if (slashCount >= 2) joined = `\\${joined.slice(slashCount)}`;
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}
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return normalize(joined);
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}
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// It will solve the relative path from `from` to `to`, for instance:
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// from = 'C:\\orandea\\test\\aaa'
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// to = 'C:\\orandea\\impl\\bbb'
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// The output of the function should be: '..\\..\\impl\\bbb'
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export function relative(from: string, to: string): string {
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assertPath(from);
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assertPath(to);
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if (from === to) return "";
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const fromOrig = resolve(from);
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const toOrig = resolve(to);
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if (fromOrig === toOrig) return "";
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from = fromOrig.toLowerCase();
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to = toOrig.toLowerCase();
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if (from === to) return "";
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// Trim any leading backslashes
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let fromStart = 0;
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let fromEnd = from.length;
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for (; fromStart < fromEnd; ++fromStart) {
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if (from.charCodeAt(fromStart) !== CHAR_BACKWARD_SLASH) break;
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}
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// Trim trailing backslashes (applicable to UNC paths only)
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for (; fromEnd - 1 > fromStart; --fromEnd) {
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if (from.charCodeAt(fromEnd - 1) !== CHAR_BACKWARD_SLASH) break;
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}
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const fromLen = fromEnd - fromStart;
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// Trim any leading backslashes
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let toStart = 0;
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let toEnd = to.length;
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for (; toStart < toEnd; ++toStart) {
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if (to.charCodeAt(toStart) !== CHAR_BACKWARD_SLASH) break;
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}
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// Trim trailing backslashes (applicable to UNC paths only)
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for (; toEnd - 1 > toStart; --toEnd) {
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if (to.charCodeAt(toEnd - 1) !== CHAR_BACKWARD_SLASH) break;
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}
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const toLen = toEnd - toStart;
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// Compare paths to find the longest common path from root
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const length = fromLen < toLen ? fromLen : toLen;
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let lastCommonSep = -1;
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let 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) === CHAR_BACKWARD_SLASH) {
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// We get here if `from` is the exact base path for `to`.
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// For example: from='C:\\foo\\bar'; to='C:\\foo\\bar\\baz'
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return toOrig.slice(toStart + i + 1);
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} else if (i === 2) {
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// We get here if `from` is the device root.
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// For example: from='C:\\'; to='C:\\foo'
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return toOrig.slice(toStart + i);
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}
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}
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if (fromLen > length) {
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if (from.charCodeAt(fromStart + i) === CHAR_BACKWARD_SLASH) {
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// We get here if `to` is the exact base path for `from`.
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// For example: from='C:\\foo\\bar'; to='C:\\foo'
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lastCommonSep = i;
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} else if (i === 2) {
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// We get here if `to` is the device root.
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// For example: from='C:\\foo\\bar'; to='C:\\'
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lastCommonSep = 3;
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}
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}
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break;
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}
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const fromCode = from.charCodeAt(fromStart + i);
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const toCode = to.charCodeAt(toStart + i);
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if (fromCode !== toCode) break;
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else if (fromCode === CHAR_BACKWARD_SLASH) lastCommonSep = i;
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}
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// We found a mismatch before the first common path separator was seen, so
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// return the original `to`.
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if (i !== length && lastCommonSep === -1) {
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return toOrig;
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}
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let out = "";
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if (lastCommonSep === -1) lastCommonSep = 0;
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// Generate the relative path based on the path difference between `to` and
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// `from`
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for (i = fromStart + lastCommonSep + 1; i <= fromEnd; ++i) {
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if (i === fromEnd || from.charCodeAt(i) === CHAR_BACKWARD_SLASH) {
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if (out.length === 0) out += "..";
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else 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 + toOrig.slice(toStart + lastCommonSep, toEnd);
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} else {
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toStart += lastCommonSep;
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if (toOrig.charCodeAt(toStart) === CHAR_BACKWARD_SLASH) ++toStart;
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return toOrig.slice(toStart, toEnd);
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}
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}
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export function toNamespacedPath(path: string): string {
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// Note: this will *probably* throw somewhere.
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if (typeof path !== "string") return path;
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if (path.length === 0) return "";
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const resolvedPath = resolve(path);
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if (resolvedPath.length >= 3) {
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if (resolvedPath.charCodeAt(0) === CHAR_BACKWARD_SLASH) {
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// Possible UNC root
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if (resolvedPath.charCodeAt(1) === CHAR_BACKWARD_SLASH) {
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const code = resolvedPath.charCodeAt(2);
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if (code !== CHAR_QUESTION_MARK && code !== CHAR_DOT) {
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// Matched non-long UNC root, convert the path to a long UNC path
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return `\\\\?\\UNC\\${resolvedPath.slice(2)}`;
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}
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}
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} else if (isWindowsDeviceRoot(resolvedPath.charCodeAt(0))) {
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// Possible device root
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if (
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resolvedPath.charCodeAt(1) === CHAR_COLON &&
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resolvedPath.charCodeAt(2) === CHAR_BACKWARD_SLASH
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) {
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// Matched device root, convert the path to a long UNC path
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return `\\\\?\\${resolvedPath}`;
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}
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}
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}
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return path;
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}
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export function dirname(path: string): string {
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assertPath(path);
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const len = path.length;
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if (len === 0) return ".";
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let rootEnd = -1;
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let end = -1;
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let matchedSlash = true;
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let offset = 0;
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const code = path.charCodeAt(0);
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// Try to match a root
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if (len > 1) {
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if (isPathSeparator(code)) {
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// Possible UNC root
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rootEnd = offset = 1;
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if (isPathSeparator(path.charCodeAt(1))) {
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// Matched double path separator at beginning
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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);
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
export function format(pathObject: FormatInputPathObject): string {
|
|
/* eslint-disable max-len */
|
|
if (pathObject === null || typeof pathObject !== "object") {
|
|
throw new TypeError(
|
|
`The "pathObject" argument must be of type Object. Received type ${typeof pathObject}`
|
|
);
|
|
}
|
|
return _format("\\", pathObject);
|
|
}
|
|
|
|
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.
|
|
*
|
|
* fromFileUrl("file:///C:/Users/foo"); // "C:\\Users\\foo"
|
|
* fromFileUrl("file:///home/foo"); // "\\home\\foo"
|
|
*
|
|
* Note that non-file URLs are treated as file URLs and irrelevant components
|
|
* are ignored.
|
|
*/
|
|
export function fromFileUrl(url: string | URL): string {
|
|
return new URL(url).pathname
|
|
.replace(/^\/*([A-Za-z]:)(\/|$)/, "$1/")
|
|
.replace(/\//g, "\\");
|
|
}
|