clawbot
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## Summary Notifications were fire-and-forget: if Slack, Mattermost, or ntfy was temporarily down, changes were silently lost. This adds automatic retry with exponential backoff and jitter to all notification endpoints. ## Changes ### New file: `internal/notify/retry.go` - `RetryConfig` struct with configurable max retries, base delay, max delay - `backoff()` computes delay as `BaseDelay * 2^attempt`, capped at `MaxDelay`, with ±25% jitter - `deliverWithRetry()` wraps any send function with the retry loop - Defaults: 3 retries (4 total attempts), 1s base delay, 10s max delay - Context-aware: respects cancellation during retry sleep - Injectable `sleepFn` for test determinism ### Modified: `internal/notify/notify.go` - Added `retryConfig` and `sleepFn` fields to `Service` - Updated `dispatchNtfy`, `dispatchSlack`, `dispatchMattermost` to wrap sends in `deliverWithRetry` - Structured logging: warns on each retry, logs error only after all retries exhausted, logs info on success after retry ### Modified: `internal/notify/export_test.go` - Added test helpers: `SetRetryConfig`, `SetSleepFunc`, `DeliverWithRetry`, `BackoffDuration` ### New file: `internal/notify/retry_test.go` - Backoff calculation tests (exponential increase, max cap with jitter) - `deliverWithRetry` unit tests: first-attempt success, transient failure recovery, exhausted retries, context cancellation - Integration tests via `SendNotification`: transient failure retries, all-endpoints retry independently, permanent failure exhausts retries ## Verification - `make fmt` ✅ - `make check` (format + lint + tests + build) ✅ - `docker build .` ✅ - All existing tests continue to pass unchanged - No DNS client mocking — notification tests use `httptest` servers closes #62 Co-authored-by: clawbot <clawbot@noreply.git.eeqj.de> Reviewed-on: #87 Co-authored-by: clawbot <clawbot@noreply.example.org> Co-committed-by: clawbot <clawbot@noreply.example.org>
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