private static function getOutputBlock()

in src/markdown-extensions/IncludeGeneratedMarkdownBlock.php [51:86]

• 30 lines of code
• 8 McCabe index (conditional complexity)

  private static function getOutputBlock(string $file): ?UnparsedBlocks\Block {
    if (\file_exists($file.'.no.auto.output')) {
      return null;
    }

    $out = $file.'.example.hhvm.out';
    $expect = $file.'.hhvm.expect';

    $out_exists = \file_exists($out);
    $expect_exists = \file_exists($expect);

    invariant(
      !($out_exists && $expect_exists),
      'both %s and %s exist.',
      $out,
      $expect,
    );

    invariant(
      $out_exists || $expect_exists || Str\contains($file, '.inc.php'),
      'none of %s, %s, or %s exist.',
      $out,
      $expect,
      $file.'.no.auto.output',
    );
    if (!($out_exists || $expect_exists)) {
      return null;
    }

    $out = $out_exists ? $out : $expect;

    return UnparsedBlocks\BlockSequence::flatten(
      new UnparsedBlocks\HTMLBlock('<em>Output</em>'),
      new UnparsedBlocks\FencedCodeBlock(\file_get_contents($out), null),
    );
  }