Friday, August 21, 2009

A couple of hooks to make life easy with git submodules

While using git at work for the last few weeks, I noticed a couple of issues with the usage of git-submodules.
  1. Submodules updated in commits when not intended to be -- more or less due to over-enthusiastic usage of git commit -a.
  2. Failure to run git-submodule update after a git-merge (git-pull) or git-checkout.
To help with these issues, I wrote a couple of git hooks. They can be pulled from my gitutils repository on github:
Three git-hooks can be found in the submodule-hooks/ directory: pre-commit, post-merge and post-checkout (post-merge-checkout provides the latter two).

pre-commit checks if any submodules have been updated in the index and are about to be committed. If so, it asks user for confirmation to go ahead with the commit.

post-merge-checkout checks if any submodules have been modified in the working tree (i.e. their git-status is "modified" under "Changed but not updated") after a branch checkout or merge. If that is the case, it asks the user if they want to run git submodule update.

Hope someone will find them useful.


Nice work
Yes, very useful, Thx!
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