Files
buzz/scripts/test-rust-cache-contract-regressions.sh
Matt Toohey 170fe5fa0c ci: harden flake-check selection and Rust targeting
Address the review of the flake check port (99b21e4fb).

An integration-only Playwright selection no longer fails flake-select:
Playwright exits 1 with a lone "No tests found" error when the file
filters match nothing in the smoke project, which listPlaywright now
reads as an empty selection, as buzz-app's listBrowser does. Listed
journeys are deduplicated, since a looped test() declaration is listed
once per iteration, and a selection over 250 journeys skips the
Playwright lane with a note: the smoke lane runs ~150 journey-runs per
shard in ~11 minutes, so 250 journey-runs per shard across ten shards
is what fits the 45-minute timeout after setup and the E2E build.

Rust entries now carry the file and the test's in-file module path
(`crates/.../auth.rs::tests::name`). repeatRust runs one cargo
invocation per package with target flags derived from the path
(src/** builds --lib --bins, tests/<stem>.rs builds --test <stem>), so
a buzz-relay change no longer compiles every test target of the crate.
It lists candidates by in-file path, prefers the test whose full name
the file's path predicts, and falls back to every suffix match only
when nothing matches (a `#[path]` module), so a same-named test in
another module is no longer repeated for a change it never saw.

The rust-cache bust knob moves into the shared key
(`unit-tests-sherpa-cache-v1`) in both the Unit Tests and flake-rust
jobs, since rust-cache ignores `key` once shared-key is set; the
contract script checks both and the flake restore's save-if, and the
regression harness covers both. flake-select installs desktop
dependencies only when a spec changed. Changed .rs files without test
functions get a summary row, test.fail() declarations count as tests,
a captured nextest 0.9.136 list/JUnit pair pins the classname contract,
and CONTRIBUTING lists what the lanes deliberately do not repeat.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Signed-off-by: Matt Toohey <contact@matttoohey.com>
2026-10-27 08:20:12 +11:00

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#!/usr/bin/env bash
set -euo pipefail
root=$(cd "$(dirname "$0")/.." && pwd)
known_good='e18b497796c12c097a38f9edb9d0641fb99eee32'
tmp=$(mktemp -d)
trap 'rm -rf "$tmp"' EXIT
mkdir -p "$tmp/.github/workflows"
cp "$root"/.github/workflows/*.yml "$tmp/.github/workflows/"
for workflow in "$root"/.github/workflows/*.yaml; do
[[ -e "$workflow" ]] || continue
cp "$workflow" "$tmp/.github/workflows/"
done
cp "$root/renovate.json" "$tmp/renovate.json"
run_contract() {
BUZZ_RUST_CACHE_CONTRACT_ROOT="$tmp" "$root/scripts/test-rust-cache-contract.sh"
}
expect_failure() {
local expected=$1
local output
if output=$(run_contract 2>&1); then
echo "expected rust cache contract failure containing: $expected" >&2
exit 1
fi
if [[ "$output" != *"$expected"* ]]; then
printf 'unexpected rust cache contract error:\n%s\n' "$output" >&2
exit 1
fi
}
write_cache_workflow() {
cat > "$tmp/.github/workflows/new-cache-user.yaml"
}
run_contract >/dev/null
write_cache_workflow <<'YAML'
name: Bad digest
on: workflow_dispatch
jobs:
cache:
runs-on: ubuntu-latest
steps:
- uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6
YAML
expect_failure 'restored rust-cache v2.9.2'
write_cache_workflow <<'YAML'
name: Mutable tag
on: workflow_dispatch
jobs:
cache:
runs-on: ubuntu-latest
steps:
- uses: Swatinem/rust-cache@v2
YAML
expect_failure 'rust-cache must stay on the v2.9.1 digest'
write_cache_workflow <<'YAML'
name: Expression ref
on: workflow_dispatch
jobs:
cache:
runs-on: ubuntu-latest
steps:
- uses: Swatinem/rust-cache@${{ matrix.cache-ref }}
YAML
expect_failure 'rust-cache must stay on the v2.9.1 digest'
write_cache_workflow <<'YAML'
name: Spaced key
on: workflow_dispatch
jobs:
cache:
runs-on: ubuntu-latest
steps:
- uses : Swatinem/rust-cache@v2
YAML
expect_failure 'rust-cache must stay on the v2.9.1 digest'
write_cache_workflow <<'YAML'
name: Flow mapping
on: workflow_dispatch
jobs:
cache:
runs-on: ubuntu-latest
steps:
- { uses: Swatinem/rust-cache@v2 }
YAML
expect_failure 'rust-cache must stay on the v2.9.1 digest'
write_cache_workflow <<'YAML'
name: Quoted key
on: workflow_dispatch
jobs:
cache:
runs-on: ubuntu-latest
steps:
- "uses": Swatinem/rust-cache@v2
YAML
expect_failure 'rust-cache must stay on the v2.9.1 digest'
rm "$tmp/.github/workflows/new-cache-user.yaml"
mkdir -p "$tmp/.github/actions/cache"
cat > "$tmp/.github/actions/cache/action.yml" <<'YAML'
name: Unsafe cache wrapper
runs:
using: composite
steps:
- { uses: Swatinem/rust-cache@v2 }
YAML
write_cache_workflow <<'YAML'
name: Local cache wrapper
on: workflow_dispatch
jobs:
cache:
runs-on: ubuntu-latest
steps:
- uses: ./.github/actions/cache
YAML
expect_failure 'rust-cache must stay on the v2.9.1 digest'
cat > "$tmp/.github/actions/cache/action.yml" <<YAML
name: Safe preferred cache wrapper
runs:
using: composite
steps:
- uses: Swatinem/rust-cache@$known_good
YAML
cat > "$tmp/.github/actions/cache/action.yaml" <<'YAML'
name: Unreachable stale cache wrapper
runs:
using: composite
steps:
- uses: Swatinem/rust-cache@v2
YAML
run_contract >/dev/null
rm -rf "$tmp/.github/actions" "$tmp/.github/workflows/new-cache-user.yaml"
cp "$root/.github/workflows/_ci-flake.yml" "$tmp/flake.orig"
python3 - "$tmp/.github/workflows/_ci-flake.yml" <<'PY'
import pathlib
import sys
path = pathlib.Path(sys.argv[1])
workflow = path.read_text()
needle = " shared-key: unit-tests-sherpa-cache-v1\n save-if: false\n"
if workflow.count(needle) != 1:
raise SystemExit("expected one flake-rust cache restore key")
path.write_text(workflow.replace(needle, " shared-key: unit-tests\n save-if: false\n"))
PY
expect_failure 'flake-rust rust-cache action must restore with.shared-key unit-tests-sherpa-cache-v1'
mv "$tmp/flake.orig" "$tmp/.github/workflows/_ci-flake.yml"
python3 - "$tmp/.github/workflows/_ci-rust.yml" <<'PY'
import pathlib
import sys
path = pathlib.Path(sys.argv[1])
workflow = path.read_text()
needle = " shared-key: unit-tests-sherpa-cache-v1\n save-if:"
replacement = " save-if:"
if workflow.count(needle) != 1:
raise SystemExit("expected one Unit Tests cache generation key")
workflow = workflow.replace(needle, replacement)
job = " unit-tests:\n"
if workflow.count(job) != 1:
raise SystemExit("expected one Unit Tests job")
workflow = workflow.replace(job, job + " env:\n shared-key: unit-tests-sherpa-cache-v1\n", 1)
path.write_text(workflow)
PY
expect_failure 'rust-cache action must keep with.shared-key set to unit-tests-sherpa-cache-v1'
echo "rust cache contract regressions passed"