Missing support for input git artifacts from on-prem gitlab with SSH auth with user is not named git

[chtcvl]

Summary

Using SSH repo url in input artifact git driver - expecting git SSH user to be parsed from git repo url. Instead hardcoded git user is passed: workflow/artifacts/git/git.go#L44

Diagnostics

What Kubernetes provider are you using?
k8sapi

What version of Argo Workflows are you running?
3.0.0-rc2

    - name: workload
      inputs:
        artifacts:
        - name: workload-script
          path: /src
          git:
            repo: gitolite@gitlab.example.com:projects/workflows.git
            revision: "tasks/workflow"
            sshPrivateKeySecret:
              name: gitlab-ro-ssh
              key: gitlab-ro-ssh
            insecureIgnoreHostKey: true

Workflow status message:

exit code 1: Error; ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain; ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain

On gitlab host:

Feb 19 16:30:10 gitlab.example.com sshd[115757]: Invalid user git from 10.24.0.246 port 51618
Feb 19 16:30:10 gitlab.example.com sshd[115757]: input_userauth_request: invalid user git [preauth]
Feb 19 16:30:10 gitlab.example.com sshd[115761]: Invalid user git from 10.24.0.247 port 52534
Feb 19 16:30:10 gitlab.example.com sshd[115761]: input_userauth_request: invalid user git [preauth]

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[simster7]

Hmm, we use go-git(https://github.com/go-git/go-git) for all of our git operations. Are you able to clone your repo using git on the command line or is it just an issue when using Argo?

[chtcvl]

The issue is only when using Argo, since gitlab expects gitolite user and receives git user. Git clone works with the same key just fine when username is picked from url.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.