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-rw-r--r--std/path/posix.ts504
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diff --git a/std/path/posix.ts b/std/path/posix.ts
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-// 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_DOT, CHAR_FORWARD_SLASH } from "./_constants.ts";
-
-import {
- _format,
- assertPath,
- isPosixPathSeparator,
- normalizeString,
-} from "./_util.ts";
-
-export const sep = "/";
-export const delimiter = ":";
-
-// path.resolve([from ...], to)
-/**
- * Resolves `pathSegments` into an absolute path.
- * @param pathSegments an array of path segments
- */
-export function resolve(...pathSegments: string[]): string {
- let resolvedPath = "";
- let resolvedAbsolute = false;
-
- for (let i = pathSegments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
- let path: string;
-
- if (i >= 0) path = pathSegments[i];
- else {
- if (globalThis.Deno == null) {
- throw new TypeError("Resolved a relative path without a CWD.");
- }
- path = Deno.cwd();
- }
-
- assertPath(path);
-
- // Skip empty entries
- if (path.length === 0) {
- continue;
- }
-
- resolvedPath = `${path}/${resolvedPath}`;
- resolvedAbsolute = path.charCodeAt(0) === CHAR_FORWARD_SLASH;
- }
-
- // At this point the path should be resolved to a full absolute path, but
- // handle relative paths to be safe (might happen when process.cwd() fails)
-
- // Normalize the path
- resolvedPath = normalizeString(
- resolvedPath,
- !resolvedAbsolute,
- "/",
- isPosixPathSeparator,
- );
-
- if (resolvedAbsolute) {
- if (resolvedPath.length > 0) return `/${resolvedPath}`;
- else return "/";
- } else if (resolvedPath.length > 0) return resolvedPath;
- else return ".";
-}
-
-/**
- * Normalize the `path`, resolving `'..'` and `'.'` segments.
- * @param path to be normalized
- */
-export function normalize(path: string): string {
- assertPath(path);
-
- if (path.length === 0) return ".";
-
- const isAbsolute = path.charCodeAt(0) === CHAR_FORWARD_SLASH;
- const trailingSeparator =
- path.charCodeAt(path.length - 1) === CHAR_FORWARD_SLASH;
-
- // Normalize the path
- path = normalizeString(path, !isAbsolute, "/", isPosixPathSeparator);
-
- if (path.length === 0 && !isAbsolute) path = ".";
- if (path.length > 0 && trailingSeparator) path += "/";
-
- if (isAbsolute) return `/${path}`;
- return path;
-}
-
-/**
- * Verifies whether provided path is absolute
- * @param path to be verified as absolute
- */
-export function isAbsolute(path: string): boolean {
- assertPath(path);
- return path.length > 0 && path.charCodeAt(0) === CHAR_FORWARD_SLASH;
-}
-
-/**
- * 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 {
- if (paths.length === 0) return ".";
- let joined: string | undefined;
- for (let i = 0, len = paths.length; i < len; ++i) {
- const path = paths[i];
- assertPath(path);
- if (path.length > 0) {
- if (!joined) joined = path;
- else joined += `/${path}`;
- }
- }
- if (!joined) return ".";
- return normalize(joined);
-}
-
-/**
- * Return the relative path from `from` to `to` based on current working directory.
- * @param from path in current working directory
- * @param to path in current working directory
- */
-export function relative(from: string, to: string): string {
- assertPath(from);
- assertPath(to);
-
- if (from === to) return "";
-
- from = resolve(from);
- to = resolve(to);
-
- if (from === to) return "";
-
- // Trim any leading backslashes
- let fromStart = 1;
- const fromEnd = from.length;
- for (; fromStart < fromEnd; ++fromStart) {
- if (from.charCodeAt(fromStart) !== CHAR_FORWARD_SLASH) break;
- }
- const fromLen = fromEnd - fromStart;
-
- // Trim any leading backslashes
- let toStart = 1;
- const toEnd = to.length;
- for (; toStart < toEnd; ++toStart) {
- if (to.charCodeAt(toStart) !== CHAR_FORWARD_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_FORWARD_SLASH) {
- // We get here if `from` is the exact base path for `to`.
- // For example: from='/foo/bar'; to='/foo/bar/baz'
- return to.slice(toStart + i + 1);
- } else if (i === 0) {
- // We get here if `from` is the root
- // For example: from='/'; to='/foo'
- return to.slice(toStart + i);
- }
- } else if (fromLen > length) {
- if (from.charCodeAt(fromStart + i) === CHAR_FORWARD_SLASH) {
- // We get here if `to` is the exact base path for `from`.
- // For example: from='/foo/bar/baz'; to='/foo/bar'
- lastCommonSep = i;
- } else if (i === 0) {
- // We get here if `to` is the root.
- // For example: from='/foo'; to='/'
- lastCommonSep = 0;
- }
- }
- break;
- }
- const fromCode = from.charCodeAt(fromStart + i);
- const toCode = to.charCodeAt(toStart + i);
- if (fromCode !== toCode) break;
- else if (fromCode === CHAR_FORWARD_SLASH) lastCommonSep = i;
- }
-
- let out = "";
- // Generate the relative path based on the path difference between `to`
- // and `from`
- for (i = fromStart + lastCommonSep + 1; i <= fromEnd; ++i) {
- if (i === fromEnd || from.charCodeAt(i) === CHAR_FORWARD_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 + to.slice(toStart + lastCommonSep);
- else {
- toStart += lastCommonSep;
- if (to.charCodeAt(toStart) === CHAR_FORWARD_SLASH) ++toStart;
- return to.slice(toStart);
- }
-}
-
-/**
- * Resolves path to a namespace path
- * @param path to resolve to namespace
- */
-export function toNamespacedPath(path: string): string {
- // Non-op on posix systems
- return path;
-}
-
-/**
- * Return the directory name of a `path`.
- * @param path to determine name for
- */
-export function dirname(path: string): string {
- assertPath(path);
- if (path.length === 0) return ".";
- const hasRoot = path.charCodeAt(0) === CHAR_FORWARD_SLASH;
- let end = -1;
- let matchedSlash = true;
- for (let i = path.length - 1; i >= 1; --i) {
- if (path.charCodeAt(i) === CHAR_FORWARD_SLASH) {
- if (!matchedSlash) {
- end = i;
- break;
- }
- } else {
- // We saw the first non-path separator
- matchedSlash = false;
- }
- }
-
- if (end === -1) return hasRoot ? "/" : ".";
- if (hasRoot && end === 1) return "//";
- return path.slice(0, end);
-}
-
-/**
- * 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;
-
- 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 >= 0; --i) {
- const code = path.charCodeAt(i);
- if (code === CHAR_FORWARD_SLASH) {
- // If we reached a path separator that was not part of a set of path
- // separators at the end of the string, stop now
- if (!matchedSlash) {
- start = i + 1;
- break;
- }
- } else {
- if (firstNonSlashEnd === -1) {
- // We saw the first non-path separator, remember this index in case
- // we need it if the extension ends up not matching
- matchedSlash = false;
- firstNonSlashEnd = i + 1;
- }
- if (extIdx >= 0) {
- // Try to match the explicit extension
- if (code === ext.charCodeAt(extIdx)) {
- if (--extIdx === -1) {
- // We matched the extension, so mark this as the end of our path
- // component
- end = i;
- }
- } else {
- // Extension does not match, so our result is the entire path
- // component
- extIdx = -1;
- end = firstNonSlashEnd;
- }
- }
- }
- }
-
- if (start === end) end = firstNonSlashEnd;
- else if (end === -1) end = path.length;
- return path.slice(start, end);
- } else {
- for (i = path.length - 1; i >= 0; --i) {
- if (path.charCodeAt(i) === CHAR_FORWARD_SLASH) {
- // 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`.
- * @param path with extension
- */
-export function extname(path: string): string {
- assertPath(path);
- 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;
- for (let i = path.length - 1; i >= 0; --i) {
- const code = path.charCodeAt(i);
- if (code === CHAR_FORWARD_SLASH) {
- // 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: "" };
- if (path.length === 0) return ret;
- const isAbsolute = path.charCodeAt(0) === CHAR_FORWARD_SLASH;
- let start: number;
- if (isAbsolute) {
- ret.root = "/";
- start = 1;
- } else {
- start = 0;
- }
- let startDot = -1;
- let startPart = 0;
- 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 >= start; --i) {
- const code = path.charCodeAt(i);
- if (code === CHAR_FORWARD_SLASH) {
- // 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) {
- if (startPart === 0 && isAbsolute) {
- ret.base = ret.name = path.slice(1, end);
- } else {
- ret.base = ret.name = path.slice(startPart, end);
- }
- }
- } else {
- if (startPart === 0 && isAbsolute) {
- ret.name = path.slice(1, startDot);
- ret.base = path.slice(1, end);
- } else {
- ret.name = path.slice(startPart, startDot);
- ret.base = path.slice(startPart, end);
- }
- ret.ext = path.slice(startDot, end);
- }
-
- if (startPart > 0) ret.dir = path.slice(0, startPart - 1);
- else if (isAbsolute) ret.dir = "/";
-
- return ret;
-}
-
-/**
- * Converts a file URL to a path string.
- *
- * fromFileUrl("file:///home/foo"); // "/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.");
- }
- return decodeURIComponent(
- url.pathname.replace(/%(?![0-9A-Fa-f]{2})/g, "%25"),
- );
-}
-
-/**
- * Converts a path string to a file URL.
- *
- * toFileUrl("/home/foo"); // new URL("file:///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 url = new URL("file:///");
- url.pathname = path.replace(/%/g, "%25").replace(/\\/g, "%5C");
- return url;
-}