ci: scope SpotBugs to a PR's changed modules (per-module skip) - #1484
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ci: scope SpotBugs to a PR's changed modules (per-module skip)#1484joaodinissf wants to merge 1 commit into
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SpotBugs' per-module analysis is the spotbugs job's long pole. A PR only needs its changed modules scanned, so a pre-step injects <spotbugs.skip>true> into every unchanged reactor module's pom — the plugin then skips the goal, and the per-module JVM fork, for them. The full-reactor compile is kept (a changed module keeps its complete aux-classpath); a build/config change falls back to a full scan. pull_request only — master/snapshot run a full scan. -Dspotbugs.onlyAnalyze was the cleaner-looking alternative but screens too late (after the per-module fork), ~17% vs ~88% measured; the script header documents the migration if an upstream SpotBugs early-exit ever lands. - .github/scripts/compute-spotbugs-skip.sh: diff -> changed modules -> inject skip into the unchanged ones (idempotent; build/config change -> full scan). - verify.yml spotbugs job: fetch-depth 0 + a scope step before compile; -Djgit.dirtyWorkingTree=ignore because the scope step dirties poms on purpose and this job releases nothing (releases/maven-verify keep =error); SARIF upload guarded so an empty scan set (no module scanned) doesn't fail the upload. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Supersedes #1400 (recreated from an in-repo branch to form a native stacked-PR chain).
Note
Stacked on #1396 → #1399. Against
masterthe diff includes those commits (they drop out as they merge) — review only the SpotBugs-scoping commit (compute-spotbugs-skip.sh+ the spotbugs-job edits inverify.yml).Problem
SpotBugs is the
spotbugsjob's long pole (per-module bytecode analysis + a JVM fork per module). A PR only needs its changed modules scanned.What this does
A pre-step injects
<spotbugs.skip>true>into every unchanged reactor module's pom, so the plugin skips the goal — and the per-module fork — for them. The full-reactor compile is kept (a changed module keeps its complete aux-classpath).pull_requestonly; master/snapshot run a full scan. A build/config change → full scan (fail-safe)..github/scripts/compute-spotbugs-skip.sh— diff → changed modules → inject skip into the unchanged ones (idempotent; never touchesddk-parent).verify.ymlspotbugs job —fetch-depth: 0+ the scope step;-Djgit.dirtyWorkingTree=ignore(the scope step intentionally dirties poms and this job releases nothing — releases/maven-verifykeep=error); SARIF upload guarded against an empty scan set.Validated
Controlled fork probe (cold cache): a one-module Java change →
scanning 1 / skipping 62; spotbugs job 2m45s vs 8m33s–9m13s full scans,BUILD SUCCESS, 0 violations, SARIF uploaded; all other jobs green.Why not
-Dspotbugs.onlyAnalyzeCleaner-looking (one flag) but SpotBugs screens too late (after the per-module fork) — ~17% vs ~88% measured. If an upstream SpotBugs early-exit lands, switch to
onlyAnalyzeand drop this script (noted in the script header).Merge chain:
#1399(merged) → #1396 → #1400 (this PR) → #1456 → #1457 → #1397🤖 Generated with Claude Code