Function resolve

repos/effect/packages/effect/src/Path.ts:388–436

()

  let resolvedPath = ""
  let resolvedAbsolute = false
  let cwd: string | undefined = undefined

  for (let i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
    let path: string
    if (i >= 0) {
      path = arguments[i]
    } else {
      const process = (globalThis as any).process
      if (
        cwd === undefined && "process" in globalThis &&
        typeof process === "object" &&
        process !== null &&
        typeof process.cwd === "function"
      ) {
        cwd = process.cwd()
      }
      path = cwd!
    }

    // Skip empty entries
    if (path.length === 0) {
      continue
    }

    resolvedPath = path + "/" + resolvedPath
    resolvedAbsolute = path.charCodeAt(0) === 47 /*/*/
  }

  // 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 = normalizeStringPosix(resolvedPath, !resolvedAbsolute)

  if (resolvedAbsolute) {
    if (resolvedPath.length > 0) {
      return "/" + resolvedPath
    } else {
      return "/"
    }
  } else if (resolvedPath.length > 0) {
    return resolvedPath
  } else {
    return "."
  }
}

const CHAR_FORWARD_SLASH = 47

function toFileUrl(filepath: string) {
  const outURL = new URL("file://")
  let resolved = resolve(filepath)