[Bug]: A run fails if a private Git has (using SSH auth) has a Git submodule using HTTPS auth

[peterschmidt85]

Steps to reproduce

1. Clone a Git repo using SSH auth

Example:

git clone git@github.com:peterschmidt85/git-submodule-parent.git
cd git-submodule-parent

2. Add a submodule using HTTPS auth

git submodule add https://github.com/peterschmidt85/git-submodule-public
git add .gitmodules git-submodule-public 
git commit -m "Properly add submodule"
git push origin main

Here's .gitmodules:

[submodule "git-submodule-public"]
	path = git-submodule-public
	url = https://github.com/peterschmidt85/git-submodule-public

type: task
name: git-submodule-dev

commands: 
  - |
    find .

dstack init
dstack apply -f .dstack.yml

Actual behaviour

$ dstack logs -d git-submodule-dev
time=2025-06-27T04:18:52.869099-04:00 level=info msg=Run job log_level=trace
time=2025-06-27T04:18:52.869136-04:00 level=trace msg=checking if repo checkout is needed
time=2025-06-27T04:18:52.871193-04:00 level=trace msg=Fetching git repository
time=2025-06-27T04:18:52.871223-04:00 level=trace msg=Credentials is not empty
time=2025-06-27T04:18:52.871232-04:00 level=trace msg=Select SSH protocol
time=2025-06-27T04:18:52.871697-04:00 level=trace msg=Checking out remote repo GIT URL=ssh://git@github.com/peterschmidt85/git-submodule-parent.git
time=2025-06-27T04:18:52.871717-04:00 level=info msg=git checkout path=/workflow auth=*ssh.PublicKeys url=ssh://git@github.com/peterschmidt85/git-submodule-parent.git branch=main hash=777ddea4e3455861643fb812423fb0c63e91dc52
time=2025-06-27T04:18:55.09289-04:00 level=info msg=Job state changed new=failed
time=2025-06-27T04:18:55.092932-04:00 level=error msg=Executor failed err=[executor.go:141 executor.(*RunExecutor).Run] [repo.go:47 executor.(*RunExecutor).setupRepo] [repo.go:93 executor.(*RunExecutor).prepareGit] [manager.go:70 repo.(*Manager).Checkout] invalid auth method

Expected behaviour

1. Runner should fetch the repo without errors

dstack version

0.19.16

Server logs

Additional information

Workaround:

Change the URL of the submodule from using HTTPS to using SSH auth:

git submodule add git@github.com:peterschmidt85/git-submodule-public