path.mjs

/* eslint require-jsdoc:0 -- shim */

function dirname(p) {
  return p.split("/").slice(0, -1).join("/") || p
}

function extname(p) {
  return /\.[\w$-]+$/iu.exec(p)[0]
}

function relative(s) {
  return s
}

function resolve(s) {
  return s
}

function isAbsolute() {
  return false
}

function join(...args) {
  return args.length ? normalize(args.join("/")) : "."
}

function normalize(path) {
  let result = []
  for (const part of path.replace(/\/+/gu, "/").split("/")) {
    if (part === "..") {
      if (result[0] && result[0] !== ".." && result[0] !== ".") result.shift()
    } else if (part === "." && result.length) {
      // noop
    } else {
      result.unshift(part)
    }
  }
  return result.reverse().join("/")
}

const sep = "/"
const posix = {
  dirname,
  extname,
  resolve,
  relative,
  sep,
  isAbsolute,
  join,
  normalize,
}
posix.posix = posix
export {
  dirname,
  extname,
  posix,
  resolve,
  relative,
  sep,
  isAbsolute,
  join,
  normalize,
}
export default posix