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Sameen Karim
a4485f5298
When a user runs `gh stack submit` and an existing PR is discovered for
a branch via `FindPRForBranch`, that PR may have auto-merge enabled.
Auto-merge is incompatible with stacked PRs because the PR would merge
on its own, breaking the stack's base chain.
Previously, the eligibility guard for auto-merge was only in the `link`
command (which blocks such PRs with an error). The `submit` command had
no such check, allowing users to add auto-merge-enabled PRs to a stack
by running `init` followed by `submit`.
This change adds auto-merge detection and automatic disabling in
`submit`'s `ensurePR` function. When an existing PR with auto-merge
enabled is discovered, the CLI disables auto-merge via the
`disablePullRequestAutoMerge` GraphQL mutation and warns the user.
If the disable call fails, submit continues with a warning (non-fatal).
The `link` command retains its stricter behavior of blocking auto-merge
PRs outright, since the user explicitly chose those PRs and can fix
them before retrying.
Changes:
internal/github/github.go:
- Add DisableAutoMerge() method using the
disablePullRequestAutoMerge GraphQL mutation
internal/github/client_interface.go:
- Add DisableAutoMerge(prID string) error to ClientOps interface
internal/github/mock_client.go:
- Add DisableAutoMergeFn field and mock implementation
cmd/submit.go:
- In ensurePR, after discovering an existing PR with auto-merge
enabled, call DisableAutoMerge before proceeding. Warns on
success ("Disabled auto-merge for PR #N (incompatible with
stacked PRs)") and on failure ("failed to disable auto-merge").
cmd/submit_test.go:
- Add TestSubmit_DisablesAutoMergeOnExistingPR: verifies auto-merge
is disabled and warning is shown
- Add TestSubmit_DisableAutoMergeFailure_ContinuesWithWarning:
verifies submit continues even if the disable call fails
- Add TestSubmit_NoAutoMerge_SkipsDisable: verifies DisableAutoMerge
is not called for PRs without auto-merge