Migrate from protobuild to buf

Like containerd did recently, we can migrate from protobuild to buf.

containerd/containerd#12762

Signed-off-by: Kazuyoshi Kato <kazuyoshi.kato@baseten.co>

Author: kzys

.github/workflows/ci.yml

@@ -193,26 +193,19 @@ jobs:
           go-version: '1.22.x'
           cache-dependency-path: src/github.com/containerd/cgroups
 
-      - name: Set env
-        shell: bash
-        run: |
-          echo "GOPATH=${{ github.workspace }}" >> $GITHUB_ENV
-          echo "${{ github.workspace }}/bin" >> $GITHUB_PATH
-
-      - name: Install protoc
-        run: |
-          curl -LO https://github.com/protocolbuffers/protobuf/releases/download/v21.5/protoc-21.5-linux-x86_64.zip
-          # /usr/local is not writable from GitHub Actions' user
-          sudo unzip protoc-21.5-linux-x86_64.zip -d /usr/local
+      - name: Install buf
+        uses: bufbuild/buf-action@v1
+        with:
+          # We don't use Buf Schema Registry.
+          push: false
+          format: false
+          lint: false
 
-      - name: Install proto-related tools for Go
-        run: |
-          go install google.golang.org/protobuf/cmd/protoc-gen-go@v1.28
-          go install github.com/containerd/protobuild@v0.3.0
-          go install github.com/containerd/protobuild/cmd/go-fix-acronym@v0.3.0
+      - name: Install go-fix-acronym
+        run: go install github.com/containerd/protobuild/cmd/go-fix-acronym@v0.3.0
 
       - name: Compare auto-generated Go files
         run: |
-          make proto
+          make maintainer-clean proto
           git diff --exit-code
         working-directory: src/github.com/containerd/cgroups

Makefile

@@ -23,7 +23,16 @@ all: cgutil
 cgutil:
 	cd cmd/cgctl && $(GO) build $(GO_BUILD_FLAGS) -v $(GO_TAGS)
 
+# Follow GNU's standards
+# https://www.gnu.org/prep/standards/html_node/Standard-Targets.html
+maintainer-clean:
+	find cgroup1 cgroup2 \( -name '*.pb.go' -o -name '*.pb.txt' \) -delete
+
 proto:
-	protobuild --quiet ${PACKAGES}
-	# Keep them Go-idiomatic and backward-compatible with the gogo/protobuf era.
-	go-fix-acronym -w -a '(Cpu|Tcp|Rss|Psi)' $(shell find cgroup1/stats/ cgroup2/stats/ -name '*.pb.go')
+	buf generate
+	@# Keep them Go-idiomatic and backward-compatible with the gogo/protobuf era.
+	go-fix-acronym -w -a '(Cpu|Tcp|Rss|Psi)' cgroup1/stats/metrics.pb.go cgroup2/stats/metrics.pb.go
+	buf build --exclude-source-info --path cgroup1/stats/metrics.proto -o cgroup1/stats/metrics.pb.txt#format=txtpb
+	buf build --exclude-source-info --path cgroup2/stats/metrics.proto -o cgroup2/stats/metrics.pb.txt#format=txtpb
+
+.PHONY: all cgutil maintainer-clean proto

Protobuild.toml

@@ -0,0 +1,6 @@
+version: v2
+plugins:
+  - remote: buf.build/protocolbuffers/go:v1.28.1
+    out: .
+    opt:
+      - paths=source_relative

buf.gen.yaml

@@ -0,0 +1,4 @@
+# For details on buf.yaml configuration, visit https://buf.build/docs/configuration/v2/buf-yaml
+version: v2
+modules:
+  - path: .