feat: add GitLab support to coderd/externalauth/gitprovider

Fixes CODAGT-146

Add GitLab support to the gitprovider package for gitsync/chatd PR
diff flows. This is a squashed stack of 3 PRs:

#25651 - refactor(coderd/externalauth): prepare gitprovider for multi-provider support
- Change gitprovider.New to return (Provider, error)
- Extract shared helpers (parseRetryAfter, checkRateLimitError,
  countDiffLines, escapePathPreserveSlashes) from github.go
- Update all callers (db2sdk, exp_chats, gitsync) for new signature
- Add error logging for provider construction failures
- Thread context through provider resolution

#25652 - feat(coderd/externalauth/gitprovider): add GitLab provider
- Implement full Provider interface: FetchPullRequestStatus,
  FetchPullRequestDiff, FetchBranchDiff, ResolveBranchPullRequest
- Handle nested groups, forks, and self-hosted instances
- Rate limit detection on both library and raw HTTP paths
- URL parsing/building with NormalizePullRequestURL support
- Unit tests covering error paths, URL parsing, state mapping
- Document GitLab configuration and known limitations

#25653 - test(coderd/externalauth/gitprovider): add GitLab VCR integration tests
- FetchPullRequestStatus: 4 fixtures (open, conflicts, merged, closed)
- FetchPullRequestDiff: 4 fixtures
- FetchBranchDiff: 3 fixtures (open, deleted, fork)
- ResolveBranchPullRequest: 3 fixtures
- go-vcr cassettes with sanitized GitLab API responses
This commit is contained in:
Cian Johnston
2026-05-25 17:41:02 +01:00
committed by GitHub
parent 2ad2f7869d
commit 579daaff70
34 changed files with 4146 additions and 179 deletions
@@ -30,7 +30,7 @@ func TestGitlabDefaults(t *testing.T) {
DisplayIcon: "/icon/gitlab.svg",
Regex: `^(https?://)?gitlab\.com(/.*)?$`,
APIBaseURL: "https://gitlab.com/api/v4",
Scopes: []string{"write_repository"},
Scopes: []string{"write_repository", "read_api"},
CodeChallengeMethodsSupported: []string{string(promoauth.PKCEChallengeMethodSha256)},
}
}
@@ -91,6 +91,7 @@ func TestGitlabDefaults(t *testing.T) {
config.TokenURL = "https://gitlab.company.org/oauth/token"
config.RevokeURL = "https://gitlab.company.org/oauth/revoke"
config.Regex = `^(https?://)?gitlab\.company\.org(/.*)?$`
config.APIBaseURL = "https://gitlab.company.org/api/v4"
},
},
{
@@ -113,6 +114,7 @@ func TestGitlabDefaults(t *testing.T) {
config.RevokeURL = "https://token.com/revoke"
config.Regex = `random`
config.CodeChallengeMethodsSupported = []string{"random"}
config.APIBaseURL = "https://auth.com/api/v4"
},
},
}