Function parseCommandLine

packages/cli/src/internal/commandDescriptor.ts:511–532

(
    self: Standard | GetUserInput,
    args: ReadonlyArray<string>
  )

  FileSystem.FileSystem | Path.Path | Terminal.Terminal
> => {
  const parseCommandLine = (
    self: Standard | GetUserInput,
    args: ReadonlyArray<string>
  ): Effect.Effect<Array<string>, ValidationError.ValidationError> =>
    Arr.matchLeft(args, {
      onEmpty: () => {
        const error = InternalHelpDoc.p(`Missing command name: '${self.name}'`)
        return Effect.fail(InternalValidationError.commandMismatch(error))
      },
      onNonEmpty: (head, tail) => {
        const normalizedArgv0 = InternalCliConfig.normalizeCase(config, head)
        const normalizedCommandName = InternalCliConfig.normalizeCase(config, self.name)
        return Effect.succeed(tail).pipe(
          Effect.when(() => normalizedArgv0 === normalizedCommandName),
          Effect.flatten,
          Effect.catchTag("NoSuchElementException", () => {
            const error = InternalHelpDoc.p(`Missing command name: '${self.name}'`)
            return Effect.fail(InternalValidationError.commandMismatch(error))
          })
        )
      }
    })
  switch (self._tag) {
    case "Standard": {
      const parseBuiltInArgs = (