Gerrit recreating change-ids

Question

I am using gerrit. I used the following command

$ cd .git/hooks
$ scp -P 29418 demo@localhost:hooks/commit-msg .
$ cd ../..

This adds the change-id to my commit message, however if I amend to a commit it creates a NEW change-id. So when I push back to gerrit it's not adding the patch set, it's creating a whole new review entry.

Any suggests please?

Found the answer, but stackoverflow won't let me answer my own question.

So this was a complete error on my part. When I was trying to commit git commit --amend -m "Initial Commit"

I was inlining the commit message and that was wiping away the change-Id, thus giving me a new one.

Answer 1

commit-msg hook work that way:

1. Check if you have change-id in your commit message.
2. If not, generates one.

If you type git commit --amend and edit commit message, you still have old change-id (it is good).

But if you type git commit --amend -m "...." you have removed change-id, so gerrit generates new one.

Rule of a thumb: Don't use --amend -m with gerrit.