Programmatically `git status` with dulwich

Question

I'm wondering how I can perform the equivalent of git status with dulwich?

I tried this:

After adding/changing/renaming some files and staging them for commit, this is what I've tried doing:

from dulwich.repo  import Repo
from dulwich.index import changes_from_tree
r = Repo('my-git-repo')
index = r.open_index()
changes = index.changes_from_tree(r.object_store, r['HEAD'].tree)

Outputs the following:

>>> list(changes)
(('Makefile', None), (33188, None), ('9b20...', None))
(('test/README.txt', 'test/README.txt'), (33188, 33188), ('484b...', '4f89...'))
((None, 'Makefile.mk'), (None, 33188), (None, '9b20...'))
((None, 'TEST.txt'), (None, 33188), (None, '2a02...'))

But this output requires that I further process it to detect:

1. I modified README.txt.
2. I renamed Makefile to Makefile.mk.
3. I added TEST.txt to the repository.

The functions in dulwich.diff_tree provide a much nicer interface to tree changes... is this not possible before actually committing?

Answer 1

You should be able to use dulwich.diff_tree.tree_changes to detect the changes between two trees.

One of the requirements for this is that you add the relevant tree objects to the object store - you can use dulwich.index.commit_index for this.

Answer 2

For completeness, a working sample:

from dulwich.repo import Repo
from dulwich.diff_tree import tree_changes

repo = Repo("./") 

index = repo.open_index()

try:
    head_tree = repo.head().tree
except KeyError: # in case of empty tree
    head_tree = dulwich.objects.Tree()

changes = list(tree_changes(repo, head_tree, index.commit(repo.object_store)))


for change in changes:
    print "%s: %s"%(change.type,change.new.path)