Angular CLI's `budgets` only compare RAW sizes — there's no native
gzip-mode budget. ADR-0017 specifies thresholds in gzip-transfer
terms (initial bundle ≤ 300 KB gzip, any lazy chunk ≤ 100 KB gzip,
total stylesheet ≤ 150 KB gzip), so the project.json values today
are an approximate raw-size translation. The follow-up flagged in
ADR-0017's confirmation list — a CI check that asserts the actual
gzipped transfer size — lands here.
`scripts/check-gzip-budgets.mjs`:
- Parses Angular's emitted index.html to separate initial assets
(anything referenced via src=/href=) from lazy chunks (the rest).
- Gzips every JS / CSS file at level 9 — what most HTTP servers
serve for static assets — and reports a per-file + per-bucket
size table.
- Compares against the ADR-0017 budgets and exits non-zero on any
breach. Plain Node, no deps; ~120 lines.
Wired through:
- `pnpm ci:gzip-budgets` invokes the script with the default dist
path (`dist/apps/portal-shell/browser`).
- `ci:perf` chains build → gzip check → Lighthouse, so a
budget breach short-circuits before Lighthouse even runs (saves
several minutes on a failing PR).
ADR-0017 §Confirmation updated: the previous "future follow-up
will add a CI check" line is replaced by a description of how the
script works, with a link to it.
Verified locally on the production build:
- Initial JS total: 92.88 KB / 300 KB budget ✓
- Lazy chunks largest: 1.38 KB / 100 KB per-chunk budget ✓
- CSS total: 3.35 KB / 150 KB budget ✓
Julien Gautier