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Improve Arcanist event doucmentation

Summary:
  - Soft dependencies on D3423, D3422, D3421.
  - Document the availability of 'workflow' on all events.
  - Improve instructions on building, configuring and debugging event handlers.

Test Plan: Read documentation.

Reviewers: vrana, nh

Reviewed By: vrana

CC: aran

Differential Revision: https://secure.phabricator.com/D3424
This commit is contained in:
epriestley 2012-09-05 11:41:32 -07:00
parent 9afb186c77
commit 492b6e7a6d

View file

@ -5,17 +5,19 @@ Using Phabricator event listeners to customize behavior.
= Overview =
Phabricator allows you to install custom runtime event listeners which can react
to certain things happening (like a Maniphest Task being edited) and run custom
code to perform logging, synchronize with other systems, or modify workflows.
Phabricator and Arcanist allow you to install custom runtime event listeners
which can react to certain things happening (like a Maniphest Task being edited
or a user creating a new Differential Revision) and run custom code to perform
logging, synchronize with other systems, or modify workflows.
These listeners are PHP classes which you install beside Phabricator, and which
Phabricator loads at runtime and runs in-process. They are the most direct and
powerful way to respond to events.
These listeners are PHP classes which you install beside Phabricator or
Arcanist, and which Phabricator loads at runtime and runs in-process. They
require somewhat more effort upfront than simple configuration switches, but are
the most direct and powerful way to respond to events.
= Installing Event Listeners =
= Installing Event Listeners (Phabicator) =
To install event listeners, follow these steps:
To install event listeners in Phabricator, follow these steps:
- Write a listener class which extends @{class@libphutil:PhutilEventListener}.
- Add it to a libphutil library, or create a new library (for instructions,
@ -30,6 +32,22 @@ It should appear at the top under "Registered Event Listeners". You can also
see any events the page emitted there. For details on DarkConsole, see
@{article:Using DarkConsole}.
= Installing Event Listeners (Arcanist) =
To install event listeners in Arcanist, follow these steps:
- Write a listener class which extends @{class@libphutil:PhutilEventListener}.
- Add it to a libphutil library, or create a new library (for instructions,
see @{article:libphutil Libraries User Guide}.
- Configure Phabricator to load the library by adding it to `load`
in the Arcanist config (e.g., `.arcconfig`, or user/global config).
- Configure Arcanist to install the event listener by adding the class
name to `events.listeners` in the Arcanist config.
You can verify your listener is registered by running any `arc` command with
`--trace`. You should see output indicating your class was registered as an
event listener.
= Example Listener =
Phabricator includes an example event listener,
@ -67,6 +85,14 @@ events. Normally, you want to listen only to specific events, but if you're
writing a generic handler you can listen to all events with this constant
rather than by enumerating each event.
== Arcanist Events ==
Arcanist event constants are listed in @{class@arcanist:ArcanistEventType}.
All Arcanist events have this data available:
- `workflow` The active @{class@arcanist:ArcanistBaseWorkflow}.
== Arcanist: Commit: Will Commit SVN ==
The constant for this event is `ArcanistEventType::TYPE_COMMIT_WILLCOMMITSVN`.
@ -75,7 +101,6 @@ This event is dispatched before an `svn commit` occurs and allows you to
modify the commit message. Data available on this event:
- `message` The text of the message.
- `workflow` The active @{class:ArcanistBaseWorkflow}.
== Arcanist: Diff: Will Build Message ==