Git hook on selected branch

Question

How I can run a script when somebody merges branch "test" into "stable" ?

In other words, I want to run a script after the stable branch is updated.

Answer 1

Depends on the purpose of your hook.

You could be running it when changes to stable are published to a reference repository, or when they are being prepared on a developer's local repository. You could be running it before the commit, to be able to prevent it, or after, to only be notified of commits that took place.

Anyway, look at git help hooks. The hook script might look at HEAD and MERGE_HEAD or use git log -n1 with a custom format.