git clone --mirror fails

[xiota]

Description

I am unable to clone this repository with git clone --mirror. Upon running the command, I see the following output:

Cloning into bare repository 'swift.git'...

Followed by no output or network activity for a long time. Then the following error:

error: RPC failed; HTTP 408 curl 18 HTTP/2 stream 7 was reset
fatal: expected 'packfile'

git clone and git clone --bare appear to work as expected.

git works as expected on a fork of the repository with the "Copy the main branch only" option unchecked. (Potential solution, replace repository with a fresh fork.)

Steps to reproduce

Run: git clone --mirror https://github.com/apple/swift.git

Expected behavior

git should clone the repository.

Note: Same issue with different repository: apple/llvm-project#6919

[finagolfin]

I recently saw a similar issue with pushing a large branch to my Swift fork on github, which was fixed for me by enlarging git's http.postBuffer, maybe that will work for you too.

[tbkka]

This is an issue with git and/or Github servers and/or your network connection, not with the swift project per se.

[xiota]

Of numerous GitHub repositories, many owned by Apple, I encountered this issue with only these two repositories, both owned by Apple, when using the --mirror flag. This has been reproduced on my personal machine and two build servers outside my control, on three separate networks. This makes git configuration and network connection issues unlikely.

Some GitHub server or configuration issue related to these specific repositories is likely. However, since the repositories are owned by Apple, I would expect Apple developers or representatives would be interested in fixing the problem, contacting GitHub, if necessary, to resolve the issue. Do you really prefer to have an outsider contact GitHub directly about issues with your repositories, potentially disrupting your company's activities in the process?