How to execute a command right after a fetch or pull command in git?

Question

I cloned the GHC (Glasgow Haskell Compiler) repository. In order to build the compiler, you need several libraries, all of them are available as git repositories too. In ord

Answer 1

When you run git pull, git actually does a fetch followed by a merge. This means you can use the post-merge hook to execute a script when a pull is completed.

To set this up you just need to create an executable script in your repository's .git/hooks/ directory called post-merge.

Note that this script will not be run if the merge fails due to conflicts.