Add the ability to run a ref update hook
Allow the user to provide an update (similar to git's update hook) hook
run before a push is accepted by Gerrit. This allows the exclusion of
certain commits or any other update checks.
The hook takes the following form:
ref-update --project <project name> --refname <refname> --uploader <uploader>
--oldrev <sha1> --newrev <sha1>
If the script exits with non zero return code the push will be rejected.
The output of the script will be returned to the user as the reason for
the rejection.
This hook is called synchronously so shouldn't block or wait. A timeout
on the hook is set to 30 seconds to avoid "runaway" hooks using up server
threads. This value can be configured using "syncHookTimeout" in the
"hooks" stanza. It is an integer value in seconds.
Change-Id: Ibed5dc5c18e59db465511520f76fac93acc561e0
6 files changed
