import type { FormatInputPathObject, ParsedPath } from "./_interface.ts";import { CHAR_DOT, CHAR_FORWARD_SLASH } from "./_constants.ts";
import { _format, assertPath, encodeWhitespace, isPosixPathSeparator, normalizeString,} from "./_util.ts";
export const sep = "/";export const delimiter = ":";
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 { const { Deno } = globalThis as any; if (typeof Deno?.cwd !== "function") { throw new TypeError("Resolved a relative path without a CWD."); } path = Deno.cwd(); }
assertPath(path);
if (path.length === 0) { continue; }
resolvedPath = `${path}/${resolvedPath}`; resolvedAbsolute = path.charCodeAt(0) === CHAR_FORWARD_SLASH; }
resolvedPath = normalizeString( resolvedPath, !resolvedAbsolute, "/", isPosixPathSeparator, );
if (resolvedAbsolute) { if (resolvedPath.length > 0) return `/${resolvedPath}`; else return "/"; } else if (resolvedPath.length > 0) return resolvedPath; else return ".";}
export function normalize(path: string): string { assertPath(path);
if (path.length === 0) return ".";
const isAbsolute = path.charCodeAt(0) === CHAR_FORWARD_SLASH; const trailingSeparator = path.charCodeAt(path.length - 1) === CHAR_FORWARD_SLASH;
path = normalizeString(path, !isAbsolute, "/", isPosixPathSeparator);
if (path.length === 0 && !isAbsolute) path = "."; if (path.length > 0 && trailingSeparator) path += "/";
if (isAbsolute) return `/${path}`; return path;}
export function isAbsolute(path: string): boolean { assertPath(path); return path.length > 0 && path.charCodeAt(0) === CHAR_FORWARD_SLASH;}
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);}
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 "";
let fromStart = 1; const fromEnd = from.length; for (; fromStart < fromEnd; ++fromStart) { if (from.charCodeAt(fromStart) !== CHAR_FORWARD_SLASH) break; } const fromLen = fromEnd - fromStart;
let toStart = 1; const toEnd = to.length; for (; toStart < toEnd; ++toStart) { if (to.charCodeAt(toStart) !== CHAR_FORWARD_SLASH) break; } const toLen = toEnd - toStart;
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) { return to.slice(toStart + i + 1); } else if (i === 0) { return to.slice(toStart + i); } } else if (fromLen > length) { if (from.charCodeAt(fromStart + i) === CHAR_FORWARD_SLASH) { lastCommonSep = i; } else if (i === 0) { 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 = ""; for (i = fromStart + lastCommonSep + 1; i <= fromEnd; ++i) { if (i === fromEnd || from.charCodeAt(i) === CHAR_FORWARD_SLASH) { if (out.length === 0) out += ".."; else out += "/.."; } }
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); }}
export function toNamespacedPath(path: string): string { return path;}
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 { matchedSlash = false; } }
if (end === -1) return hasRoot ? "/" : "."; if (hasRoot && end === 1) return "//"; 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;
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 (!matchedSlash) { start = i + 1; break; } } else { if (firstNonSlashEnd === -1) { matchedSlash = false; firstNonSlashEnd = i + 1; } if (extIdx >= 0) { if (code === ext.charCodeAt(extIdx)) { if (--extIdx === -1) { end = i; } } else { 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 (!matchedSlash) { start = i + 1; break; } } else if (end === -1) { matchedSlash = false; end = i + 1; } }
if (end === -1) return ""; return path.slice(start, end); }}
export function extname(path: string): string { assertPath(path); let startDot = -1; let startPart = 0; let end = -1; let matchedSlash = true; let preDotState = 0; for (let i = path.length - 1; i >= 0; --i) { const code = path.charCodeAt(i); if (code === CHAR_FORWARD_SLASH) { if (!matchedSlash) { startPart = i + 1; break; } continue; } if (end === -1) { matchedSlash = false; end = i + 1; } if (code === CHAR_DOT) { if (startDot === -1) startDot = i; else if (preDotState !== 1) preDotState = 1; } else if (startDot !== -1) { preDotState = -1; } }
if ( startDot === -1 || end === -1 || preDotState === 0 || (preDotState === 1 && startDot === end - 1 && startDot === startPart + 1) ) { return ""; } return path.slice(startDot, end);}
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);}
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;
let preDotState = 0;
for (; i >= start; --i) { const code = path.charCodeAt(i); if (code === CHAR_FORWARD_SLASH) { if (!matchedSlash) { startPart = i + 1; break; } continue; } if (end === -1) { matchedSlash = false; end = i + 1; } if (code === CHAR_DOT) { if (startDot === -1) startDot = i; else if (preDotState !== 1) preDotState = 1; } else if (startDot !== -1) { preDotState = -1; } }
if ( startDot === -1 || end === -1 || preDotState === 0 || (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;}
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"), );}
export function toFileUrl(path: string): URL { if (!isAbsolute(path)) { throw new TypeError("Must be an absolute path."); } const url = new URL("file:///"); url.pathname = encodeWhitespace( path.replace(/%/g, "%25").replace(/\\/g, "%5C"), ); return url;}