Is there a way to automatically propose a commit message regarding to new submodule commits?-CodePudding

I'm using a library (say foo) in my projects and foo uses another library (say bar) where I'm also the maintainer of foo and bar.

When I change something in bar library, I commit the changes in bar repository with appropriate commit message. However, duplicating that appropriate message in foo and myproject is very frustrating so I just commit the changes with update bar and update foo messages respectively.

How can I make the git commit command to propose me the latest submodule commit messages?

CodePudding user response：

This is kind of hacky, but here is a way to commit the submodule change in the superproject using the same commit message as the latest submodule commit (assuming you are using Bash):

GIT_ALTERNATE_OBJECT_DIRECTORIES=.git/modules/<submodule-name>/objects git commit -C $(git -C path/to/submodule log --format=%h -1)

This runs git log in the submodule to get the hash of the latest commit, and then uses GIT_ALTERNATE_OBJECT_DIRECTORIES to temporarily add the submodule object directory as an alternate to the superproject, such that Git can go read the submodule commit message and use it for the superproject commit.

CodePudding user response：

You would not need to duplicate anything if bar was declared as a submodule inside foo repository.

cd /path/to/foo
git submodule add /url/to/bar
cd bar
# add and commit with proper message
git push
cd ..
git add bar
git commit -m "update bar"

The point is: you don't need to duplicate bar commit message, since the very bar repository is in foo, and you can directly see the bar file history, with its original commit message, in foo/bar.