public async function mainAsync()

in src/GeneratorCLI.hack [140:201]
56 lines of code
8 McCabe index (conditional complexity)

  public async function mainAsync(): Awaitable<int> {
    switch ($this->format) {
      case OutputFormat::MARKDOWN:
        $extension = '.md';
        break;
      case OutputFormat::HTML:
        $extension = '.html';
        break;
    }

    await $this->getStdout()->writeAllAsync("Parsing...\n");
    $documentables = $this->parse();
    $index = create_index(
      $documentables,
      shape(
        'hidePrivateNamespaces' => $this->hidePrivateNamespaces
      )
    );

    $paths = new SingleDirectoryPathProvider($extension);
    $config = shape(
      'format' => $this->format,
      'syntaxHighlighting' => $this->syntaxHighlightingOn,
      'hidePrivateMethods' => $this->hidePrivateMethods,
      'hideInheritedMethods' => $this->hideInheritedMethods,
    );
    $fmc = $this->frontMatterConfig;
    if ($fmc is nonnull) {
      $config['frontMatter'] = $fmc;
    }
    $context = new DocumentationBuilderContext($index, $paths, $config);
    $md_builder = new DocumentationBuilder($context);

    if ($this->outputRoot === null) {
      $prefix = '';
    } else {
      $prefix = $this->outputRoot;
      if (!Str\ends_with($prefix, '/')) {
        $prefix .= '/';
      }
    }
    if (!\is_dir($prefix)) {
      \mkdir($prefix);
    }

    await $this->getStdout()->writeAllAsync("Generating documentation...\n");
    foreach ($documentables as $documentable) {
      $content = $md_builder->getDocumentation($documentable);
      $path = get_path_for_documentable($paths, $documentable);
      \file_put_contents($prefix.$path, $content);
      $this->verboseWrite($path."\n");
    }
    await $this->getStdout()->writeAllAsync("Creating index document...\n");
    \file_put_contents(
      $prefix.'index'.$extension,
      (new IndexDocumentBuilder($context))->getIndexDocument(),
    );

    await $this->getStdout()->writeAllAsync("Done.\n");

    return 0;
  }