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Custom Python ODB backends - write() support

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#1,057 3 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
32/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Stale
Tech stack
git, python
Domain
backend

Research direction

Start by reproducing the custom MyOdbBackend.write() example and the failure at repo.create_blob(). Read the OdbBackend and add_backend interfaces plus the related documentation to determine whether write() is supported. Done means the behavior is either implemented and verified with this example or clearly documented with the limitation and error cause.

Written by the indexing model from the issue text.

Description

Is there any support for implementing write() for custom python ODB backends?

I noticed it wasn't in the docs, but tried implementing it like so:

class MyOdbBackend(pygit2.OdbBackend):

    # snip - other OdbBackend methods

   def write(self, oid, data, length, type):
        print(f"writing {oid} {length} type {type}")
        return True

repo = pygit2.Repository()
odb = pygit2.Odb()
odb.add_backend(MyOdbBackend(), 1)
repo.set_odb(odb)

test_blob_id = repo.create_blob(b"hello world\n")
print(repo[test_blob_id].data)

But I get a _pygit2.GitError: TLS backend doesn't support certificate locations on calling repo.create_blob(). The built-in backends seem to work fine.

Dominant language
Python
Stars
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Forks
408
Avg merge
2d 57m
Merged PRs (30d)
7

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