ci: shard full-suite coverage and cache merge-base profile
The Coverage context was the PR critical path (~17 min end to end): coverage-current re-ran the whole suite serially (-p 1, ~13 min) and coverage-baseline re-ran it again at the merge-base (~13 min) although that profile is a pure function of the base commit. - coverage-current now owns only the scoped (standard-tier) profile; full-suite candidate profiles come from a 5-way shard matrix (app/cli/generators/helpers/remaining) that keeps -p 1 inside each shard on isolated runners. scripts/ci/test-packages.sh list-coverage defines the shards and verify proves the union equals the previous single-run package set exactly once. - the aggregate Coverage job reassembles the disjoint shard profiles into coverage.txt before make coverage-gate, failing closed when a shard file is missing, so gate semantics (100% changed-code + scope-matched overall non-regression) are byte-compatible. - coverage-baseline restores the merge-base full-suite profile from an exact-key cache (merge-base SHA + resolved Go version) written by the last green main push; any miss falls back to recomputing in the merge-base worktree. Exact key only - no prefix fallback, a near-miss profile would compare the candidate against the wrong commit. - new contract tests pin the shard matrix, the assembly step, the exact-key cache pair, and the absence of restore-keys; the package plan test also covers the coverage shard partition.
This commit is contained in:
+147
-38
@@ -911,7 +911,7 @@ jobs:
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coverage-current:
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name: Coverage (current)
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needs: lint
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if: ${{ needs.lint.outputs.changelog_only != 'true' && needs.lint.outputs.docs_only != 'true' }}
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if: ${{ needs.lint.outputs.changelog_only != 'true' && needs.lint.outputs.docs_only != 'true' && needs.lint.outputs.full_suite != 'true' }}
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runs-on: ubuntu-latest
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timeout-minutes: 20
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steps:
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@@ -926,10 +926,6 @@ jobs:
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with:
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go-version-file: go.mod
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- name: Install archive tooling
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if: needs.lint.outputs.full_suite == 'true'
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run: sudo apt-get update && sudo apt-get install -y zip unzip
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- name: Resolve authoritative coverage base
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env:
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PR_HEAD_SHA: ${{ github.event.pull_request.head.sha }}
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@@ -951,41 +947,33 @@ jobs:
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- name: Build
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run: make build
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- name: Run current unit tests with coverage
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- name: Run scoped unit tests with coverage
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shell: bash
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env:
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DWS_PACKAGE_VERSION: 0.0.0-test
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FULL_SUITE: ${{ needs.lint.outputs.full_suite }}
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run: |
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set -euo pipefail
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if [ "$FULL_SUITE" = true ]; then
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changed_output="$(
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./scripts/ci/changed-test-packages.sh \
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changed "$COVERAGE_BASE_REF" "$COVERAGE_HEAD_REF"
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)"
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impacted_output="$(
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./scripts/ci/changed-test-packages.sh \
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list "$COVERAGE_BASE_REF" "$COVERAGE_HEAD_REF"
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)"
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if [ -z "$changed_output" ] || [ -z "$impacted_output" ]; then
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printf 'mode: atomic\n' > coverage.txt
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echo "No buildable Go package needs scoped coverage." \
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>> "$GITHUB_STEP_SUMMARY"
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else
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mapfile -t changed_packages <<< "$changed_output"
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mapfile -t impacted_packages <<< "$impacted_output"
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coverpkg="$(IFS=,; echo "${changed_packages[*]}")"
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go test -count=1 -p 1 \
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-coverpkg="$coverpkg" \
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-coverprofile=coverage.txt \
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-covermode=atomic \
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./ ./cmd/... ./internal/... ./skills/...
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else
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changed_output="$(
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./scripts/ci/changed-test-packages.sh \
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changed "$COVERAGE_BASE_REF" "$COVERAGE_HEAD_REF"
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)"
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impacted_output="$(
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./scripts/ci/changed-test-packages.sh \
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list "$COVERAGE_BASE_REF" "$COVERAGE_HEAD_REF"
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)"
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if [ -z "$changed_output" ] || [ -z "$impacted_output" ]; then
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printf 'mode: atomic\n' > coverage.txt
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echo "No buildable Go package needs scoped coverage." \
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>> "$GITHUB_STEP_SUMMARY"
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else
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mapfile -t changed_packages <<< "$changed_output"
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mapfile -t impacted_packages <<< "$impacted_output"
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coverpkg="$(IFS=,; echo "${changed_packages[*]}")"
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go test -count=1 -p 1 \
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-coverpkg="$coverpkg" \
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-coverprofile=coverage.txt \
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-covermode=atomic \
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"${impacted_packages[@]}"
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fi
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"${impacted_packages[@]}"
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fi
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if [ "$(wc -l < coverage.txt)" -gt 1 ]; then
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go tool cover -func=coverage.txt
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@@ -998,6 +986,66 @@ jobs:
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path: coverage.txt
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retention-days: 1
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coverage-current-full:
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name: "Coverage (current: ${{ matrix.shard }})"
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needs: lint
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if: ${{ needs.lint.outputs.changelog_only != 'true' && needs.lint.outputs.docs_only != 'true' && needs.lint.outputs.full_suite == 'true' }}
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runs-on: ubuntu-latest
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timeout-minutes: 20
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strategy:
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fail-fast: false
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matrix:
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shard:
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- app
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- cli
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- generators
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- helpers
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- remaining
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steps:
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- name: Check out repository
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uses: actions/checkout@v4
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with:
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ref: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
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- name: Set up Go
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uses: actions/setup-go@v5
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with:
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go-version-file: go.mod
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- name: Install archive tooling
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run: sudo apt-get update && sudo apt-get install -y zip unzip
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- name: Build
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run: make build
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# Each shard keeps -p 1 so the authoritative measurement stays serial
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# inside one instrumented process group; shards run on isolated runners,
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# and scripts/ci/test-packages.sh verify proves the shard union equals
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# the previous single full-suite package set exactly once.
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- name: Run current shard tests with coverage
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shell: bash
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env:
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DWS_PACKAGE_VERSION: 0.0.0-test
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COVERAGE_SHARD: ${{ matrix.shard }}
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run: |
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set -euo pipefail
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package_output="$(./scripts/ci/test-packages.sh list-coverage "$COVERAGE_SHARD")"
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test -n "$package_output"
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mapfile -t packages <<< "$package_output"
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test "${#packages[@]}" -gt 0
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go test -count=1 -p 1 \
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-coverprofile="coverage-shard-$COVERAGE_SHARD.txt" \
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-covermode=atomic \
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"${packages[@]}"
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go tool cover -func="coverage-shard-$COVERAGE_SHARD.txt" | tail -n 1
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- name: Upload current shard coverage profile
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uses: actions/upload-artifact@v4
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with:
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name: coverage-current-shard-${{ matrix.shard }}
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path: coverage-shard-${{ matrix.shard }}.txt
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retention-days: 1
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coverage-supporting:
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name: Coverage (supporting)
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needs: lint
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@@ -1051,14 +1099,11 @@ jobs:
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ref: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
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- name: Set up Go
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id: setup-go
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uses: actions/setup-go@v5
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with:
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go-version-file: go.mod
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- name: Install archive tooling
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if: needs.lint.outputs.full_suite == 'true'
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run: sudo apt-get update && sudo apt-get install -y zip unzip
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- name: Resolve authoritative coverage base
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env:
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PR_HEAD_SHA: ${{ github.event.pull_request.head.sha }}
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@@ -1076,7 +1121,26 @@ jobs:
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git rev-parse --verify "${base_ref}^{commit}" >/dev/null
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echo "COVERAGE_BASE_REF=$base_ref" >> "$GITHUB_ENV"
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# The merge-base full-suite profile is a pure function of the base
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# commit. Reuse the profile published by the last green push run of
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# exactly that commit instead of re-running the whole suite; any key
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# mismatch falls back to authoritative recomputation. Exact key only,
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# never prefix fallback: a near-miss profile would compare the
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# candidate against the wrong commit.
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- name: Restore cached merge-base coverage profile
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id: baseline-cache
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if: needs.lint.outputs.full_suite == 'true'
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uses: actions/cache/restore@v4
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with:
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path: coverage-base.txt
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key: dws-coverage-full-v1-${{ env.COVERAGE_BASE_REF }}-go${{ steps.setup-go.outputs.go-version }}
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- name: Install archive tooling
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if: needs.lint.outputs.full_suite == 'true' && steps.baseline-cache.outputs.cache-hit != 'true'
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run: sudo apt-get update && sudo apt-get install -y zip unzip
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- name: Run baseline unit tests with coverage
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if: steps.baseline-cache.outputs.cache-hit != 'true'
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shell: bash
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env:
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DWS_PACKAGE_VERSION: 0.0.0-test
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@@ -1125,6 +1189,13 @@ jobs:
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fi
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)
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- name: Save merge-base coverage profile cache
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if: needs.lint.outputs.full_suite == 'true' && steps.baseline-cache.outputs.cache-hit != 'true'
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uses: actions/cache/save@v4
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with:
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path: coverage-base.txt
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key: dws-coverage-full-v1-${{ env.COVERAGE_BASE_REF }}-go${{ steps.setup-go.outputs.go-version }}
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- name: Upload baseline coverage profile
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uses: actions/upload-artifact@v4
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with:
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@@ -1137,6 +1208,7 @@ jobs:
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needs:
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- lint
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- coverage-current
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- coverage-current-full
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- coverage-supporting
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- coverage-baseline
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- coverage-darwin
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@@ -1152,6 +1224,7 @@ jobs:
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FULL_SUITE: ${{ needs.lint.outputs.full_suite }}
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PLATFORM_SENSITIVE: ${{ needs.lint.outputs.platform_sensitive }}
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CURRENT_RESULT: ${{ needs.coverage-current.result }}
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CURRENT_FULL_RESULT: ${{ needs.coverage-current-full.result }}
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SUPPORTING_RESULT: ${{ needs.coverage-supporting.result }}
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BASELINE_RESULT: ${{ needs.coverage-baseline.result }}
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DARWIN_RESULT: ${{ needs.coverage-darwin.result }}
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@@ -1159,6 +1232,7 @@ jobs:
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run: |
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failed=0
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current_expected=success
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current_full_expected=skipped
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supporting_expected=skipped
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baseline_expected=success
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native_expected=skipped
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@@ -1166,6 +1240,8 @@ jobs:
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current_expected=skipped
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baseline_expected=skipped
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elif [ "$FULL_SUITE" = true ]; then
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current_expected=skipped
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current_full_expected=success
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supporting_expected=success
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fi
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if [ "$CHANGELOG_ONLY" != true ] &&
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@@ -1176,6 +1252,7 @@ jobs:
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for profile in \
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"current:$CURRENT_RESULT:$current_expected" \
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"current shards:$CURRENT_FULL_RESULT:$current_full_expected" \
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"supporting:$SUPPORTING_RESULT:$supporting_expected" \
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"baseline:$BASELINE_RESULT:$baseline_expected"
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do
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@@ -1211,6 +1288,7 @@ jobs:
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ref: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
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- name: Set up Go
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id: setup-go
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if: needs.lint.outputs.changelog_only != 'true' && needs.lint.outputs.docs_only != 'true'
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uses: actions/setup-go@v5
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with:
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@@ -1234,11 +1312,12 @@ jobs:
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git rev-parse --verify "${base_ref}^{commit}" >/dev/null
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echo "COVERAGE_BASE_REF=$base_ref" >> "$GITHUB_ENV"
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- name: Download current coverage profile
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- name: Download current coverage profiles
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if: needs.lint.outputs.changelog_only != 'true' && needs.lint.outputs.docs_only != 'true'
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uses: actions/download-artifact@v4
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with:
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name: coverage-current-profile
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pattern: coverage-current-*
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merge-multiple: true
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path: .
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- name: Download supporting coverage profiles
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@@ -1255,6 +1334,26 @@ jobs:
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name: coverage-baseline-profile
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path: .
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# Shard profiles cover disjoint package sets, so their block-level
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# concatenation is the same candidate profile one serial run produced.
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# Every expected shard must be present; a missing shard would silently
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# shrink the scope-matched overall comparison.
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- name: Assemble full-suite coverage profile
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if: needs.lint.outputs.changelog_only != 'true' && needs.lint.outputs.docs_only != 'true' && needs.lint.outputs.full_suite == 'true'
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shell: bash
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run: |
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set -euo pipefail
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test ! -f coverage.txt
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for shard in app cli generators helpers remaining; do
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profile="coverage-shard-$shard.txt"
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test -f "$profile"
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test "$(head -n 1 "$profile")" = "mode: atomic"
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done
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printf 'mode: atomic\n' > coverage.txt
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for shard in app cli generators helpers remaining; do
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tail -n +2 "coverage-shard-$shard.txt" >> coverage.txt
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done
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- name: Enforce coverage gate
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if: needs.lint.outputs.changelog_only != 'true' && needs.lint.outputs.docs_only != 'true'
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env:
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@@ -1275,6 +1374,16 @@ jobs:
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COVERAGE_ADDITIONAL_DIFF_PROFILE="$additional_profile" \
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make coverage-gate BASE_REF="$COVERAGE_BASE_REF"
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# Publish this push's full-suite profile as the merge-base cache for
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# future PRs whose merge-base is exactly this commit. Saved only after
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# the gate passed so a broken run never becomes a baseline.
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- name: Save push coverage profile as merge-base cache
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if: github.event_name == 'push' && needs.lint.outputs.changelog_only != 'true' && needs.lint.outputs.docs_only != 'true' && needs.lint.outputs.full_suite == 'true'
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uses: actions/cache/save@v4
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with:
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path: coverage.txt
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key: dws-coverage-full-v1-${{ github.sha }}-go${{ steps.setup-go.outputs.go-version }}
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- name: Generate coverage report
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if: needs.lint.outputs.changelog_only != 'true' && needs.lint.outputs.docs_only != 'true'
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run: |
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