tree 939b13c38fcbcbcb5264b4cfbbd0a218c8a99481
parent e24a7a4d2dc1acd0852ae43f92f7a4e3b1bcb6c3
author Joerg Zieren <zieren@google.com> 1559807873 +0200
committer Joerg Zieren <zieren@google.com> 1560508840 +0200

Add extension point for plugins to validate comments before publishing

This allows to prevent publication of comments that fail validation.
This change includes only the validator interface.

There are three ways to publish comments:

A) On posting the review draft comments are read and, possibly together
   with new comments included in the PostReview request, published.
B) Running "git push" when the "Publish comments on push" user option
   is enabled (code in ReceiveCommits).
C) Via email (code in MailProcessor).

Subsequent changes will add the actual validation calls.

Before plugins can use this interface with a reasonable UX, the UI
needs to handle the new error in PostReview. Until then the UI will
show an error message that does not indicate the comment validation
failure.

Change-Id: Icd1a206dc6468a2e9b08cf3a39de9860bc879c4b