GitPython get tree and blob object by sha

git, gitpython

Solution

Try this:

   def read_file_from_branch(self, repo, branch, path, charset='ascii'):
            '''
            return the contents of a file in a branch, without checking out the
            branch
            '''
            if branch in repo.heads:
                blob = (repo.heads[branch].commit.tree / path)
                if blob:
                    data = blob.data_stream.read()
                    if charset:
                        return data.decode(charset)
                    return data
            return None

Problem

I'm using GitPython with a bare repository and I'm trying to get specific git object by its SHA. If I used git directly, I would just do this ``` git ls-tree sha_of_tree git show sha_of_blob ``` Since I'm using GitPython and I want to get a specific tree, I do the following: ``` repo = Repo("path_to_my_repo") repo.tree("b466a6098a0287ac568ef0ad783ae2c35d86362b") ``` And get this back ``` <git.Tree "b466a6098a0287ac568ef0ad783ae2c35d86362b"> ``` Now I have a tree object, but I cannot access its attributes like path, name, blobs, etc. ``` repo.tree("b466a6098a0287ac568ef0ad783ae2c35d86362b").path ``` ``` Traceback (most recent call last): File "<stdin>", line 1, in <module> File "c:\Python27\lib\site-packages\gitdb\util.py", line 238, in __getattr__ self._set_cache_(attr) File "c:\Python27\lib\site-packages\git\objects\tree.py", line 147, in _set_cache_ super(Tree, self)._set_cache_(attr) File "c:\Python27\lib\site-packages\git\objects\base.py", line 157, in _set_cache_ raise AttributeError( "path and mode attributes must have been set during %s object creation" % type(self).__name__ ) AttributeError: path and mode attributes must have been set during Tree object creation ``` But if I type the following, it works ``` repo.tree().trees[0].path ``` The other part of my question is how to get a blob object with GitPython. I noticed that the only object tree has attribute blobs, so in order to get blob by SHA, I have to (a) first know which tree it belongs to, (b) find this blob, and then (c) call the `data_stream` method. I could just do ``` repo.git.execute("git show blob_sha") ``` but I would like to know first that this is the only way to do this.

Original source