Completes the crash-interrupted #192 WIP (app/build.gradle.kts already had a
jacocoTestReport task and toolVersion pin recovered onto build-192-jacoco):
- Move the JaCoCo tool version into gradle/libs.versions.toml instead of a
hardcoded string in app/build.gradle.kts, matching how every other plugin
version in this repo is sourced.
- Fix the generated-code exclusion list against the real compileDebugKotlin
output (verified by inspecting the compiled class tree): Room's
KSP-generated `_Impl` DAOs/database and the Compose compiler's per-file
ComposableSingletons holders are the only generated code that actually
lands in classDirectories, since Hilt/Dagger's generated Java and AGP's
BuildConfig/R/Manifest are compiled by a separate javac task this report
never reads. Drop the blanket `**/*$$*` exclude the WIP had — it was
silently discarding ~200 real classes' worth of coverage on Kotlin's own
`$$inlined$` synthetic classes (e.g. Flow.map { ... } transforms in the
repositories), which is hand-written logic, not generated boilerplate.
- Add Hilt_*/Dagger* prefix patterns so the (currently inert,
belt-and-suspenders) Hilt exclusions are actually correct if the
classDirectories scope ever changes.
- Add a minimal CI step to the existing unit-tests job that runs
jacocoTestReport and uploads the XML+HTML report as a build artifact.
No coverage threshold gate yet (a jacocoTestCoverageVerification rule is
a natural follow-up once there's a baseline).
- Document the new :app:jacocoTestReport task in CLAUDE.md.
Verified on JDK 21: fast gate (assembleDebug, testDebugUnitTest,
compileDebugAndroidTestKotlin, lintDebug, ktlintCheck, detekt) plus
jacocoTestReport all pass, from both a warm and a `clean` build. The
report shows real signal (30% instruction / 38% line coverage) with no
generated classes leaking in.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
JMR-devandClaude Opus 4.8
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