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feat(go): M5.4 — parity diff binary + make parity
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Adds cmd/parity/main.go: a standalone Go binary that GETs
/api/version, /api/adults, /api/juniors, /api/payments from both
the Python (:5001) and Go (:8080) backends, scrubs an allowlist
(render_time.total, build_meta), and prints cmp.Diff for any
remaining differences.  Exits 0 on full match, 1 on diffs, 2 on
fetch/parse errors — CI-friendly for M7.2.

- go/cmd/parity/main.go: flags (-py, -go, -route, -timeout), fetch
  helper, allowlist scrubber (dotted-path aware), exit-code logic.
- go/cmd/parity/scrub_test.go: 4 unit tests for the scrubber.
- go/go.mod: promote github.com/google/go-cmp to direct dep.
- Makefile: parity target + help entry.
- Progress tracker: M5.4 ticked; milestone updated to M5 complete.
- Plan archived to docs/plans/2026-05-07-2254-m5-4-parity-binary.md.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
Jan Novak
2026-05-07 22:57:30 +02:00
parent 423c3e2a4b
commit 6f36225187
7 changed files with 355 additions and 4 deletions
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CHANGELOG.md
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@@ -1,5 +1,13 @@
# Changelog
## 2026-05-07 22:55 CEST — feat(go): M5.4 — parity diff binary + `make parity`
- `go/cmd/parity/main.go`: new standalone binary that GETs `/api/version`, `/api/adults`, `/api/juniors`, `/api/payments` from both Python (:5001) and Go (:8080) backends, scrubs an allowlist (`render_time.total`, `build_meta`), and prints `cmp.Diff` for any remaining differences. Exits 0 on full match, 1 on diffs, 2 on fetch/parse errors — CI-friendly for M7.2.
- `go/cmd/parity/scrub_test.go`: 4 unit tests covering top-level delete, nested delete, missing path, and non-map parent.
- `go/go.mod`: `github.com/google/go-cmp` promoted to direct dependency.
- `Makefile`: `parity` target added (`.PHONY`, help, `cd go && go run ./cmd/parity`).
- `docs/plans/2026-05-07-2254-m5-4-parity-binary.md`: plan archived.
## 2026-05-07 22:37 CEST — feat(py): M5.3 — Python /api/* shadow endpoints
- `app.py`: four new JSON routes (`/api/version`, `/api/adults`, `/api/juniors`, `/api/payments`) mirroring the Go `/api/*` handlers; `_unwrap_view_model_for_api()` helper expands pre-serialised JSON strings and renames `month_labels_json` → `month_labels`, `raw_payments_json` → `raw_payments` to match Go wire contract.