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capturePreviousNewLines(); if (! function_exists('pcntl_fork')) { return $this->renderStatically($callback); } $originalAsync = pcntl_async_signals(true); pcntl_signal(SIGINT, fn () => exit()); try { $this->hideCursor(); $this->render(); $this->pid = pcntl_fork(); if ($this->pid === 0) { while (true) { // @phpstan-ignore-line $this->render(); $this->count++; usleep($this->interval * 1000); } } else { $result = $callback(); $this->resetTerminal($originalAsync); return $result; } } catch (\Throwable $e) { $this->resetTerminal($originalAsync); throw $e; } } /** * Reset the terminal. */ protected function resetTerminal(bool $originalAsync): void { pcntl_async_signals($originalAsync); pcntl_signal(SIGINT, SIG_DFL); $this->eraseRenderedLines(); } /** * Render a static version of the spinner. * * @template TReturn of mixed * * @param \Closure(): TReturn $callback * @return TReturn */ protected function renderStatically(Closure $callback): mixed { $this->static = true; try { $this->hideCursor(); $this->render(); $result = $callback(); } finally { $this->eraseRenderedLines(); } return $result; } /** * Disable prompting for input. * * @throws \RuntimeException */ public function prompt(): never { throw new RuntimeException('Spinner cannot be prompted.'); } /** * Get the current value of the prompt. */ public function value(): bool { return true; } /** * Clear the lines rendered by the spinner. */ protected function eraseRenderedLines(): void { $lines = explode(PHP_EOL, $this->prevFrame); $this->moveCursor(-999, -count($lines) + 1); $this->eraseDown(); } /** * Clean up after the spinner. */ public function __destruct() { if (! empty($this->pid)) { posix_kill($this->pid, SIGHUP); } parent::__destruct(); } }