add blobs or trees to a created repository using pygit2 (libgit2)?

Question

I am trying to use pygit2 library.

seems I got stuck on the first step. its documentation doesn't explain how to create a blob and add it to a tree. It is mostly around how to work with an existing git repository but I want to create one and add blobs, commits, ... to my repo. Is it possible to create a blob from a file directly or should I read the file contents and set blob.data?

from pygit2 import Repository
from pygit2 import init_repository

bare = False
repo = init_repository('test', bare)

How can I create and add blobs or trees to the repository?

nulltoken · Accepted Answer · 2012-05-02 15:09:00Z

7

The python bindings don't let you create a blob from a file directly, so you'll have to read in the file to memory and use Repository.write(pygit2.GIT_OBJ_BLOB, filecontents) to create the blob.

You can then create trees with the TreeBuilder, for example, like

import pygit2 as g

repo = g.Repository('.')
# grab the file from wherever and store in 'contents'
oid = repo.write(g.GIT_OBJ_BLOB, contents)
bld = repo.TreeBuilder()
# attributes is whether it's a file or dir, 100644, 100755 or 040000
bld.insert('file.txt', oid, attributes)
treeoid = bld.write()

edited May 2, 2012 at 15:09

nulltoken

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answered May 2, 2012 at 14:14

Carlos Martín Nieto

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6 Comments

Peqi Hash Over a year ago

Thanks a lot, how can I learn more about pygit2? none of what you mentioned is in pygit2 document, How did you learn how to use it?

T0xicCode Over a year ago

@PeqiHash Carlos is one of the developers of libgit2

ChipJust Over a year ago

If you changed a file do you still add the whole file to the repo as a blob and then reference that oid with an insert using TreeBuilder...or is there something to do with a patch here?

Carlos Martín Nieto Over a year ago

Patches exist on a different level. The full contents of each version of a file are contained in a blob. If you update it, you need to update the blob and any tree leading from it up to the root.

JojOatXGME Over a year ago

How to handle it if the file may be inside a subdirectory (and the directory may or may not exist yet)? It seems that I cannot write bld.insert('path/to/file.txt', oid, attributes).

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