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vishrvishr
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ci: keep the Go build cache current
actions/setup-go keys its cache on the Go version and go.sum only. The first job to finish after a new Go release or a go.sum change saves the entry, and every later run hits that key and skips saving. Master CI is still restoring the entries saved on 2026-09-11 (Go 1.27.1), so everything that changed since then recompiles in every run. Replace it with actions/cache restore/save, keyed per OS, architecture, Go version and job. Each run restores the newest cache saved for its key prefix, and runs other than pull requests save a new entry for the commit, so the cache tracks master. Pull requests only restore, which keeps the repository's cache storage bounded. A full race build cache compresses to about 80 MB. Claude-Session: https://claude.ai/code/session_01QKDYQr53zNKkR7nif2CAAq
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‎.github/workflows/checks.yml‎

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# https://github.com/actions/setup-go/commit/924ae3a1cded613372ab5595356fb5720e22ba16
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SETUP_GO_ACTION: &setup_go_action actions/setup-go@924ae3a1cded613372ab5595356fb5720e22ba16 # v6
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# https://github.com/actions/cache/commit/55cc8345863c7cc4c66a329aec7e433d2d1c52a9
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CACHE_RESTORE_ACTION: &cache_restore_action actions/cache/restore@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
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CACHE_SAVE_ACTION: &cache_save_action actions/cache/save@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
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jobs:
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check:
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runs-on: ubuntu-latest
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with:
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go-version: ${{ env.LATEST_GO_VERSION }}
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check-latest: true
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cache: false
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# setup-go's built-in cache is keyed on go.sum only, so its entry is never refreshed and
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# soon holds little of the current build. Restore the latest cache saved for this job
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# instead, and save a new one after runs other than pull requests, which only restore.
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- name: Find Go Cache
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id: go-cache
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shell: bash
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run: |
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{
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echo "build=$(go env GOCACHE)"
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echo "mod=$(go env GOMODCACHE)"
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echo "key=go-${{ runner.os }}-${{ runner.arch }}-$(go env GOVERSION)-${{ github.job }}"
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} >> "$GITHUB_OUTPUT"
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- name: Restore Go Cache
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id: go-cache-restore
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uses: *cache_restore_action
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with:
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path: |
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${{ steps.go-cache.outputs.build }}
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${{ steps.go-cache.outputs.mod }}
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key: ${{ steps.go-cache.outputs.key }}-${{ github.sha }}
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restore-keys: ${{ steps.go-cache.outputs.key }}-
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- name: Run golint
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run: |
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go version
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go install golang.org/x/vuln/cmd/govulncheck@latest
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govulncheck ./...
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- name: Save Go Cache
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if: github.event_name != 'pull_request' && steps.go-cache-restore.outputs.cache-hit != 'true'
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uses: *cache_save_action
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with:
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path: |
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${{ steps.go-cache.outputs.build }}
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${{ steps.go-cache.outputs.mod }}
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key: ${{ steps.go-cache.outputs.key }}-${{ github.sha }}

‎.github/workflows/echo.yml‎

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# https://github.com/actions/setup-go/commit/924ae3a1cded613372ab5595356fb5720e22ba16
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SETUP_GO_ACTION: &setup_go_action actions/setup-go@924ae3a1cded613372ab5595356fb5720e22ba16 # v6
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# https://github.com/actions/cache/commit/55cc8345863c7cc4c66a329aec7e433d2d1c52a9
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CACHE_RESTORE_ACTION: &cache_restore_action actions/cache/restore@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
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CACHE_SAVE_ACTION: &cache_save_action actions/cache/save@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
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# https://github.com/codecov/codecov-action/commit/fb8b3582c8e4def4969c97caa2f19720cb33a72f
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CODECOV_ACTION: &codecov_action codecov/codecov-action@fb8b3582c8e4def4969c97caa2f19720cb33a72f # v7
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uses: *setup_go_action
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with:
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go-version: ${{ matrix.go }}
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cache: false
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# setup-go's built-in cache is keyed on go.sum only, so its entry is never refreshed and
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# soon holds little of the current build. Restore the latest cache saved for this job
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# instead, and save a new one after runs other than pull requests, which only restore.
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- &find_go_cache
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name: Find Go Cache
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id: go-cache
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shell: bash
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run: |
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{
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echo "build=$(go env GOCACHE)"
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echo "mod=$(go env GOMODCACHE)"
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echo "key=go-${{ runner.os }}-${{ runner.arch }}-$(go env GOVERSION)-${{ github.job }}"
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} >> "$GITHUB_OUTPUT"
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- &restore_go_cache
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name: Restore Go Cache
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id: go-cache-restore
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uses: *cache_restore_action
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with:
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path: |
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${{ steps.go-cache.outputs.build }}
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${{ steps.go-cache.outputs.mod }}
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key: ${{ steps.go-cache.outputs.key }}-${{ github.sha }}
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restore-keys: ${{ steps.go-cache.outputs.key }}-
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- name: Run Tests
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run: go test -race --coverprofile=coverage.coverprofile --covermode=atomic ./...
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- &save_go_cache
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name: Save Go Cache
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if: github.event_name != 'pull_request' && steps.go-cache-restore.outputs.cache-hit != 'true'
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uses: *cache_save_action
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with:
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path: |
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${{ steps.go-cache.outputs.build }}
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${{ steps.go-cache.outputs.mod }}
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key: ${{ steps.go-cache.outputs.key }}-${{ github.sha }}
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- name: Upload coverage to Codecov
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if: success() && matrix.go == env.LATEST_GO_VERSION && matrix.os == 'ubuntu-latest'
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uses: *codecov_action
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uses: *setup_go_action
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with:
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go-version: ${{ env.LATEST_GO_VERSION }}
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cache: false
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- *find_go_cache
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- *restore_go_cache
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- name: Install Dependencies
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run: go install golang.org/x/perf/cmd/benchstat@latest
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- name: Run Benchstat
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run: |
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benchstat previous/benchmark.txt new/benchmark.txt
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- *save_go_cache

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