libgit2 / libgit2/libgit2sharp

unexpected EOF when trying to fetch from remote

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描述

I'm having an issue with a remote repo hosted on a BitBucket v7.21.4. The clone command works just fine, but when I try to fetch a particular branch if fails with LibGit2Sharp.LibGit2SharpException: unexpected EOF.
The issue is constantly reproducible.

Reproduction steps

Example code:

        using var repo = new Repository(repositoryPath);
        var fetchOpts = new FetchOptions();
        fetchOpts.CertificateCheck = (_,_,_) => true;
        fetchOpts.CredentialsProvider = (_, _, _) => new UsernamePasswordCredentials() { Username = remoteUser, Password = remotePassword };
        fetchOpts.Prune = true;
        fetchOpts.TagFetchMode = TagFetchMode.None;
        var remote = repo.Network.Remotes["origin"];
        Commands.Fetch(repo, remote.Name, [$"+refs/heads/{remoteBranch}:refs/remotes/{remote.Name}/{remoteBranch}"], fetchOpts, null);
Expected behavior

Fetch to complete successfully.

Actual behavior
Unhandled exception. LibGit2Sharp.LibGit2SharpException: unexpected EOF

Below is the trace:

Debug: Sending POST request to https://<repourl>/scm/<proj>/<repo>.git/git-upload-pack
Trace: Sending request:
POST /scm/<proj>/<repo>.git/git-upload-pack HTTP/1.1
User-Agent: git/2.0 (libgit2 1.7.1)
Host: <host>
Accept: application/x-git-upload-pack-result
Content-Type: application/x-git-upload-pack-request
Content-Length: 1124
Authorization: Basic <auth>


Trace: Sending request:
0074want 3edd78a0fa98c3c2361088051ef762b8ae617a7c multi_ack_detailed side-band-64k include-tag thin-pack ofs-delta 
00000032have 6bb975022c21ceb358e9686ec47f62f0df5ab76b
0032have 19339ffb0a1a4a31c1ed445155ff5a0819a90404
...
0032have 4fcfbe8283ab4d7df213d4aad49213e078579dd5
0000
Trace: Received:

Unhandled exception. LibGit2Sharp.LibGit2SharpException: unexpected EOF

Below is the the trace from the OS git client fetch from the same remote which works just fine:

$git fetch origin master
...
12:39:35.668070 pkt-line.c:80           packet:        fetch> command=fetch
12:39:35.668091 pkt-line.c:80           packet:        fetch> agent=git/2.39.2
12:39:35.668095 pkt-line.c:80           packet:        fetch> 0001
12:39:35.668098 pkt-line.c:80           packet:        fetch> thin-pack
12:39:35.668102 pkt-line.c:80           packet:        fetch> ofs-delta
12:39:35.668108 pkt-line.c:80           packet:        fetch> want 3edd78a0fa98c3c2361088051ef762b8ae617a7c
12:39:35.668119 pkt-line.c:80           packet:        fetch> have 6bb975022c21ceb358e9686ec47f62f0df5ab76b
...
12:39:35.668678 pkt-line.c:80           packet:        fetch> have 7bb74cc0c823352f64704ffcf72a1449d7fa355d
12:39:35.668683 pkt-line.c:80           packet:        fetch> 0000

I noticed that it sends only thin-pack and ofs-delta arguments as opposed to multi_ack_detailed side-band-64k include-tag thin-pack ofs-delta from libgit2sharp.
Is there a way to control this behavior with code?

Version of LibGit2Sharp (release number or SHA1)

Libgit2sharp v0.29.0

Operating system(s) tested; .NET runtime tested

.NET SDK:
Version: 8.0.101
Commit: 6eceda187b
Workload version: 8.0.100-manifests.69afb982

Runtime Environment:
OS Name: Mac OS X
OS Version: 14.3
OS Platform: Darwin
RID: osx-x64

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调研方向

从 Commands.Fetch 和 FetchOptions 开始,然后跟踪 fetch 请求如何声明 multi_ack_detailed、side-band-64k 和 include-tag 等能力。将其与正常工作的 OS Git 请求进行比较,并确定 LibGit2Sharp 是否提供对这些选项的控制;完成的标准是确定一种受支持的配置,或确定与 Bitbucket 7.21.4 之间可复现的协议不兼容性。

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评估

技术栈
csharp, git
领域
devtools, networking
Issue 类型
缺陷
难度
4/5
预计耗时
3-5 天
活跃度
停滞
描述清晰度
基本清楚
新手友好度
25/100

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