During make, I create string fields which I embedded in the linked output. Very useful.
Other than a complex sed/grep parsing of the git status command, how can I easily determine if files in the workspace have been modified according to git?
If you just want a plain “Are there any differences from HEAD?”:
git diff-index --quiet HEAD
If the exit code is 0, then there were no differences.
If you want “What files have changed from HEAD?”:
git diff-index --name-only HEAD
If you want “What files have changed from HEAD, and in what ways have they changed (added, deleted, changed)?”:
git diff-index --name-status HEAD
Add -M (and -C) if you want rename (and copy) detection.
These commands will check both the staged contents (what is in the index) and the files in the working tree. Alternatives like git ls-files -m will only check the working tree against the index (i.e. they will disregard any staged (but uncommitted) content that is also in the working tree).
git ls-files -m
To find this you could have browsed through git help -a.
git status --porcelain seems to give a nice parsable output.
git diff --name-only does the same (might be more intuitive...)
For git hooks, I found this command useful
git diff-index --exit-code --ignore-submodules HEAD
For example
//run some static analysis check that can change the code
something_changed=`git diff-index --exit-code --ignore-submodules HEAD`
if [ -n "$something_changed" ]
then
echo >&2 "Something changed in $local_ref, not pushing"
exit 1
fi
来源：https://stackoverflow.com/questions/3882838/whats-an-easy-way-to-detect-modified-files-in-a-git-workspace