Add Herald support for blocking ref changes
Summary: Ref T4195. Allows users to write Herald rules which block ref changes. For example, you can write a rule like alincoln can not create branches, or no one can push to the branch "frozen".
Test Plan:
This covers a lot of ground. I created and pushed a bunch of rules, then looked at transcripts, in general. Here are some bits in detail:
Here's a hook-based reject message:
>>> orbital ~/repos/POEMS $ git push
Counting objects: 5, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (3/3), done.
Writing objects: 100% (3/3), 274 bytes, done.
Total 3 (delta 2), reused 0 (delta 0)
remote: +---------------------------------------------------------------+
remote: | * * * PUSH REJECTED BY EVIL DRAGON BUREAUCRATS * * * |
remote: +---------------------------------------------------------------+
remote: \
remote: \ ^ /^
remote: \ / \ // \
remote: \ |\___/| / \// .\
remote: \ /V V \__ / // | \ \ *----*
remote: / / \/_/ // | \ \ \ |
remote: @___@` \/_ // | \ \ \/\ \
remote: 0/0/| \/_ // | \ \ \ \
remote: 0/0/0/0/| \/// | \ \ | |
remote: 0/0/0/0/0/_|_ / ( // | \ _\ | /
remote: 0/0/0/0/0/0/`/,_ _ _/ ) ; -. | _ _\.-~ / /
remote: ,-} _ *-.|.-~-. .~ ~
remote: \ \__/ `/\ / ~-. _ .-~ /
remote: \____(Oo) *. } { /
remote: ( (--) .----~-.\ \-` .~
remote: //__\\ \ DENIED! ///.----..< \ _ -~
remote: // \\ ///-._ _ _ _ _ _ _{^ - - - - ~
remote:
remote:
remote: This commit was rejected by Herald pre-commit rule H24.
remote: Rule: No Branches Called Blarp
remote: Reason: "blarp" is a bad branch name
remote:
To ssh://dweller@localhost/diffusion/POEMS/
! [remote rejected] blarp -> blarp (pre-receive hook declined)
error: failed to push some refs to 'ssh://dweller@localhost/diffusion/POEMS/'Here's a transcript, showing that all the field values populate sensibly:
{F90453}
Here's a rule:
{F90454}
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T4195
Differential Revision: https://secure.phabricator.com/D7782