Custom Configuration for Phabricator

By  on  

Phabricator is an excellent code review tool used by Facebook and other respected software engineering organizations.  The user interface is beautiful, the workflow and tools are concise and comprehensive, and it's a utility that covers most use cases, both web and command line.  I've written a many Phabricator extensions and I've found that creating a single configuration extension to be used by other extensions is of great utility.  Let's look at how easy it is to create your own custom configuration to be used throughout your extensions!

Creating the Configuration Extension

Start by creating a new class that extends PhabricatorApplicationConfigOptions:

final class PhabricatorBugzillaConfigOptions
  extends PhabricatorApplicationConfigOptions {

  // ....
  
}

Fill in a few boilerplate methods:

public function getName() {
  return pht('Bugzilla');
}

public function getDescription() {
  return pht('Configure Bugzilla Settings.');
}

public function getIcon() {
  return 'fa-cog';
}

public function getGroup() {
  return 'apps';
}

The getOptions method is where the individual settings are defined; let's create a few sample settings:

public function getOptions() {
  return array(
    $this->newOption(
      'bugzilla.url',
      'string',
      'https://bugzilla.mozilla.org')
      ->setDescription(pht('Full URL for the Bugzilla server.')),
    $this->newOption(
      'bugzilla.automation_user',
      'string',
      'phab-bot@bmo.tld')
      ->setDescription(pht('Automation Username on Bugzilla.')),
    $this->newOption(
      'bugzilla.timeout',
      'int',
      15)
      ->setDescription(pht('Bugzilla timeout in seconds.')),
    $this->newOption(
      'bugzilla.require_bugs',
      'bool',
      false)
      ->setDescription(pht('Require existing Bugzilla bug numbers for revisions.')),
  );
}

These settings translate to the UI in this manner:

Phabricator Configuration

The config value type is important in that Phabricator reads it and renders a field relevant to the type; for example, bool types provide a True/False dropdown.

Using Config Values

When you want to use config values in other extensions, you can reference those config values by key with PhabricatorEnv::getEnvConfig calls:

// Use PhabricatorEnv::getEnvConfig() to get config values
if(PhabricatorEnv::getEnvConfig('bugzilla.require_bugs') === true) {
  // ...
}

The value returned by getEnvConfig is of the type defined in the configuration extension.

I'm a huge fan of using configuration values defined through a user interface; the alternative usually requires a redeploy and, in cases of emergency, that's a worst case scenario.  When values are easy to define, change, and use, you've found yourself in a win/win/win situation, and that's how it should always be!

Recent Features

  • By
    Write Better JavaScript with Promises

    You've probably heard the talk around the water cooler about how promises are the future. All of the cool kids are using them, but you don't see what makes them so special. Can't you just use a callback? What's the big deal? In this article, we'll...

  • By
    Create a CSS Flipping Animation

    CSS animations are a lot of fun; the beauty of them is that through many simple properties, you can create anything from an elegant fade in to a WTF-Pixar-would-be-proud effect. One CSS effect somewhere in between is the CSS flip effect, whereby there's...

Incredible Demos

  • By
    CSS Vertical Centering

    Front-end developing is beautiful, and it's getting prettier by the day. Nowadays we got so many concepts, methodologies, good practices and whatnot to make our work stand out from the rest. Javascript (along with its countless third party libraries) and CSS have grown so big, helping...

  • By
    Page Visibility API

    One event that's always been lacking within the document is a signal for when the user is looking at a given tab, or another tab. When does the user switch off our site to look at something else? When do they come back?

Discussion

    Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!