Adding utilities to run buf in Docker.

Makefile

@@ -315,20 +315,32 @@ build_buf_container:
 	$(DOCKER) build . -t $(BUF_CONTAINER) -f containers/Dockerfile.buf
 
 run_buf: build_buf_container
-	$(DOCKER) run --volume "$(shell pwd):/workspace" --workdir /workspace $(BUF_CONTAINER) $(ARGS)
+	$(eval BUF_TMP_DP_FOLDER:=buf-tmp)
+	@if [ ! -d "$(BUF_TMP_DP_FOLDER)" ]; then mkdir $(BUF_TMP_DP_FOLDER); fi
+	$(DOCKER) run \
+		--volume "$(shell pwd):/workspace" \
+		--volume $(BUF_TMP_DP_FOLDER):/tmp \
+		--workdir /workspace \
+		$(BUF_CONTAINER) \
+		$(ARGS)
+	@rm -rf $(BUF_TMP_DP_FOLDER)
 
 fmt-proto: build_buf_container
 	@echo "Tidying up Proto files"
-	$(MAKE) run_buf ARGS="format -w"
+	$(MAKE) run_buf ARGS="format -w --exclude-path vendor/"
 
 lint-proto: build_buf_container
 	@echo "Linting Proto files"
-	$(MAKE) run_buf ARGS="lint --exclude-path vendor"
+	$(MAKE) run_buf ARGS="lint --exclude-path vendor/"
 
 generate-proto: build_buf_container
 	@echo "Generating Proto files"
 	$(MAKE) run_buf ARGS="generate"
 
+dep-update-proto:
+	@echo "Updating buf.lock deps"
+	$(MAKE) run_buf ARGS="dep update"
+
 ########################################
 ########### RELEASE UTILITIES ##########
 ########################################

containers/Dockerfile.buf

@@ -1,12 +1,21 @@
+# Setup Go alpine to install protoc-gen-go plugin.
 FROM golang:alpine AS golang
 ENV GO111MODULE=on
-
 RUN go install google.golang.org/protobuf/cmd/[email protected]
 
+# Setup Buf to have buf available.
 FROM bufbuild/buf:1.45.0 AS buf
 
+# Add diffutils and its dependencies, which are needed by buf format.
+FROM alpine AS diffutils
+RUN apk add --no-cache diffutils
+RUN mkdir /deps && ldd /usr/bin/diff | tr -s '[:blank:]' '\n' | grep '^/' | xargs -I '{}' cp --parents '{}' /deps
+
+# Wrap everything together in a scratch container to do all things buf.
 FROM scratch
 COPY --from=golang /go/bin/protoc-gen-go /go/bin/protoc-gen-go
 COPY --from=buf /usr/local/bin/buf /usr/local/bin/buf
+COPY --from=diffutils /usr/bin/diff /usr/bin/diff
+COPY --from=diffutils /deps /
 ENV PATH="/go/bin:${PATH}"
 ENTRYPOINT ["/usr/local/bin/buf"]