It's been pointed out to me that determining whether a commit is present
in a stable branch is non-trivial (cherry-picks are a pain to search for)
and the commands are hard to remember, making it too much to ask.
This script aims to solve that problem; at its simplest form, it only
takes a commit and a branch and tells the user whether that commit
predates the branch, was cherry-picked to it, or is not present in any
form in the branch.
$ bin/commit_in_branch.py e58a10af64 fdo/20.1
Commit e58a10af64 is in branch 20.1
$ echo $?
0
$ bin/commit_in_branch.py dd2bd68fa6 fdo/20.1
Commit dd2bd68fa6 was backported to branch 20.1 as commit d043d24654
$ echo $?
0
$ bin/commit_in_branch.py master fdo/20.1
Commit 2fbcfe170bf50fcbcd2fc70a564a4d69096d968c is NOT in branch 20.1
$ echo $?
1
Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5306>
