Unable to rollback to a revision in the history when git repository is down

[carlosrodfern]

Checklist:

• I've searched in the docs and FAQ for my answer: https://bit.ly/argocd-faq.
• I've included steps to reproduce the bug.
• I've pasted the output of argocd version (grabbed from the server ui)

Describe the bug

When git repositories are down, argo-cd is unable to rollback even though the history is there. This is something that can be done in other tools like helm which preserves the revision local in the cluster. This makes it harder to revert app changes that coincidentally happen when the git repo is not accessible to ArgoCD.

To Reproduce

Deploy a kustomize app with ArgoCD and then cut communications with the git repo.

Expected behavior

ArgoCD rolls back the app based on the historical data preserved.

Screenshots

The error in the UI says:

Unable to rollback application: application spec for **** is invalid: InvalidSpecError: repository not accesible: .... repo client error while testing repository: rpc error = ... context deadline exceeded (Client.Timeout exceeded while awaiting headers).

Version

v2.13.1+af54ef8