mirror of
https://github.com/swc-project/swc.git
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446 lines
13 KiB
TypeScript
446 lines
13 KiB
TypeScript
// Loaded from https://deno.land/std@0.69.0/path/posix.ts
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// 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 type { FormatInputPathObject, ParsedPath } from "./_interface.ts";
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import { CHAR_DOT, CHAR_FORWARD_SLASH } from "./_constants.ts";
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import {
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assertPath,
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normalizeString,
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isPosixPathSeparator,
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_format,
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} from "./_util.ts";
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export const sep = "/";
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export const delimiter = ":";
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// path.resolve([from ...], to)
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export function resolve(...pathSegments: string[]): string {
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let resolvedPath = "";
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let resolvedAbsolute = false;
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for (let i = pathSegments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
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let path: string;
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if (i >= 0) path = pathSegments[i];
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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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path = Deno.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) === CHAR_FORWARD_SLASH;
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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 = normalizeString(
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resolvedPath,
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!resolvedAbsolute,
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"/",
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isPosixPathSeparator,
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);
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if (resolvedAbsolute) {
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if (resolvedPath.length > 0) return `/${resolvedPath}`;
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else return "/";
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} else if (resolvedPath.length > 0) return resolvedPath;
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else return ".";
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}
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export function normalize(path: string): string {
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assertPath(path);
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if (path.length === 0) return ".";
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const isAbsolute = path.charCodeAt(0) === CHAR_FORWARD_SLASH;
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const trailingSeparator =
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path.charCodeAt(path.length - 1) === CHAR_FORWARD_SLASH;
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// Normalize the path
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path = normalizeString(path, !isAbsolute, "/", isPosixPathSeparator);
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if (path.length === 0 && !isAbsolute) path = ".";
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if (path.length > 0 && trailingSeparator) path += "/";
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if (isAbsolute) return `/${path}`;
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return path;
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}
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export function isAbsolute(path: string): boolean {
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assertPath(path);
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return path.length > 0 && path.charCodeAt(0) === CHAR_FORWARD_SLASH;
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}
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export function join(...paths: string[]): string {
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if (paths.length === 0) return ".";
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let joined: string | undefined;
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for (let i = 0, len = paths.length; i < len; ++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) joined = path;
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else joined += `/${path}`;
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}
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}
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if (!joined) return ".";
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return normalize(joined);
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}
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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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from = resolve(from);
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to = resolve(to);
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if (from === to) return "";
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// Trim any leading backslashes
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let fromStart = 1;
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const fromEnd = from.length;
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for (; fromStart < fromEnd; ++fromStart) {
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if (from.charCodeAt(fromStart) !== CHAR_FORWARD_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 = 1;
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const toEnd = to.length;
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for (; toStart < toEnd; ++toStart) {
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if (to.charCodeAt(toStart) !== CHAR_FORWARD_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_FORWARD_SLASH) {
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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) === CHAR_FORWARD_SLASH) {
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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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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_FORWARD_SLASH) lastCommonSep = i;
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}
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let 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) === CHAR_FORWARD_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) 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) === CHAR_FORWARD_SLASH) ++toStart;
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return to.slice(toStart);
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}
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}
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export function toNamespacedPath(path: string): string {
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// Non-op on posix systems
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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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if (path.length === 0) return ".";
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const hasRoot = path.charCodeAt(0) === CHAR_FORWARD_SLASH;
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let end = -1;
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let matchedSlash = true;
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for (let i = path.length - 1; i >= 1; --i) {
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if (path.charCodeAt(i) === CHAR_FORWARD_SLASH) {
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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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export function basename(path: string, ext = ""): string {
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if (ext !== undefined && typeof ext !== "string") {
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throw new TypeError('"ext" argument must be a string');
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}
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assertPath(path);
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let start = 0;
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let end = -1;
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let matchedSlash = true;
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let i: number;
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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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let extIdx = ext.length - 1;
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let firstNonSlashEnd = -1;
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for (i = path.length - 1; i >= 0; --i) {
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const code = path.charCodeAt(i);
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if (code === CHAR_FORWARD_SLASH) {
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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;
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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) === CHAR_FORWARD_SLASH) {
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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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export function extname(path: string): string {
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assertPath(path);
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let startDot = -1;
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let startPart = 0;
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let end = -1;
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let 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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let preDotState = 0;
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for (let i = path.length - 1; i >= 0; --i) {
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const code = path.charCodeAt(i);
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if (code === CHAR_FORWARD_SLASH) {
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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 === CHAR_DOT) {
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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;
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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 (
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startDot === -1 ||
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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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) {
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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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export function format(pathObject: FormatInputPathObject): string {
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/* eslint-disable max-len */
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if (pathObject === null || typeof pathObject !== "object") {
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throw new TypeError(
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`The "pathObject" argument must be of type Object. Received type ${typeof pathObject}`,
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);
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}
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return _format("/", pathObject);
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}
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export function parse(path: string): ParsedPath {
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assertPath(path);
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const ret: ParsedPath = { root: "", dir: "", base: "", ext: "", name: "" };
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if (path.length === 0) return ret;
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const isAbsolute = path.charCodeAt(0) === CHAR_FORWARD_SLASH;
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let start: number;
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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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let startDot = -1;
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let startPart = 0;
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let end = -1;
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let matchedSlash = true;
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let 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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let preDotState = 0;
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// Get non-dir info
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for (; i >= start; --i) {
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const code = path.charCodeAt(i);
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if (code === CHAR_FORWARD_SLASH) {
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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 === CHAR_DOT) {
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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;
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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 (
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startDot === -1 ||
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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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) {
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if (end !== -1) {
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if (startPart === 0 && isAbsolute) {
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ret.base = ret.name = path.slice(1, end);
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} else {
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ret.base = ret.name = path.slice(startPart, end);
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}
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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);
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else if (isAbsolute) ret.dir = "/";
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return ret;
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}
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/** Converts a file URL to a path string.
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*
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* fromFileUrl("file:///home/foo"); // "/home/foo"
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*/
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export function fromFileUrl(url: string | URL): string {
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url = url instanceof URL ? url : new URL(url);
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if (url.protocol != "file:") {
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throw new TypeError("Must be a file URL.");
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}
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return decodeURIComponent(
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url.pathname.replace(/%(?![0-9A-Fa-f]{2})/g, "%25"),
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);
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}
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