gitpython and git diff

Question

I am looking to get only the diff of a file changed from a git repo. Right now, I am using gitpython to actually get the commit objects and the files of git changes, but I want to do a dependency analysis on only the parts of the file changed. Is there any way to get the git diff from git python? Or am I going to have to compare each of the files by reading line by line?

Answer 1

If you want to access the contents of the diff, try this:

repo = git.Repo(repo_root.as_posix())
commit_dev = repo.commit("dev")
commit_origin_dev = repo.commit("origin/dev")
diff_index = commit_origin_dev.diff(commit_dev)

for diff_item in diff_index.iter_change_type('M'):
    print("A blob:\n{}".format(diff_item.a_blob.data_stream.read().decode('utf-8')))
    print("B blob:\n{}".format(diff_item.b_blob.data_stream.read().decode('utf-8'))) 

This will print the contents of each file.