Use buf to generate the protobuf & gRPC code

Makefile

@@ -2,23 +2,15 @@
 Q=$(if $V,,@)
 SRC=$(shell find . -type f -name '*.go')
 
-# protoc-gen-go constraints
-GEN_GO_BIN ?= protoc-gen-go
-GEN_GO_MIN_VERSION ?= 1.36.1
-GEN_GO_VERSION ?= $(shell $(GEN_GO_BIN) --version | awk -F ' v' '{print $$NF}')
-
-# protoc-gen-go-grpc constraints
-GEN_GRPC_BIN ?= protoc-gen-go-grpc
-GEN_GRPC_MIN_VERSION ?= 1.5.1
-GEN_GRPC_VERSION ?= $(shell $(GEN_GRPC_BIN) --version | awk -F ' ' '{print $$NF}')
-
 # Go tools
 GOIMPORTS=golang.org/x/tools/cmd/goimports
 GOLANGCI_LINT=github.com/golangci/golangci-lint/v2/cmd/golangci-lint
+GOLANGCI_LINT_CONFIG_URL=https://raw.githubusercontent.com/smallstep/workflows/master/.golangci.yml
 GOTESTSUM=gotest.tools/gotestsum
 GOVULNCHECK=golang.org/x/vuln/cmd/govulncheck
+BUF=github.com/bufbuild/buf/cmd/buf
 
-all: lint generate test
+all: generate lint test
 
 ci: test
 
@@ -30,16 +22,6 @@ ci: test
 
 build: ;
 
-#########################################
-# Bootstrapping
-#########################################
-
-bootstra%:
-	$Q go install -mod=readonly google.golang.org/protobuf/cmd/protoc-gen-go
-	$Q go install -mod=readonly google.golang.org/grpc/cmd/protoc-gen-go-grpc
-
-.PHONY: bootstrap
-
 #########################################
 # Test
 #########################################
@@ -61,7 +43,7 @@ fmt:
 
 lint: SHELL:=/bin/bash
 lint:
-	$Q LOG_LEVEL=error go tool $(GOLANGCI_LINT) run --config <(curl -s https://raw.githubusercontent.com/smallstep/workflows/master/.golangci.yml) --timeout=30m
+	$Q LOG_LEVEL=error go tool $(GOLANGCI_LINT) run --config <(curl -s $(GOLANGCI_LINT_CONFIG_URL)) --timeout=30m ./...
 	$Q go tool $(GOVULNCHECK) ./...
 
 .PHONY: fmt lint
@@ -70,40 +52,15 @@ lint:
 # Generate
 #########################################
 
-generate: check-gen-go-version check-gen-grpc-version
+generate:
 	@# remove any previously generated protobufs & gRPC files
 	@find . \
 		-type f \
 		-name "*.pb.go" \
 		-delete
 
 	@# generate the corresponding protobufs & gRPC code files
-	$Q protoc \
-		--proto_path=spec \
-		--go_opt=module=github.com/smallstep/linkedca \
-		--go_out=. \
-		--go-grpc_opt=module=github.com/smallstep/linkedca \
-		--go-grpc_out=. \
-		$(shell find spec -type f -name "*.proto")	
+	$Q go tool $(BUF) generate -o .
 
 .PHONY: generate
 
-#########################################
-# Tool constraints
-#########################################
-
-check-gen-go-version:
-	@if ! printf "%s\n%s" "$(GEN_GO_MIN_VERSION)" "$(GEN_GO_VERSION)" | sort -V -C; then \
-		echo "Your $(GEN_GO_BIN) version (v$(GEN_GO_VERSION)) is older than the minimum required (v$(GEN_GO_MIN_VERSION))."; \
-		exit 1; \
-	fi
-
-.PHONY: check-gen-go-version
-
-check-gen-grpc-version:
-	@if ! printf "%s\n%s" "$(GEN_GRPC_MIN_VERSION)" "$(GEN_GRPC_VERSION)" | sort -V -C; then \
-		echo "Your $(GEN_GRPC_BIN) version (v$(GEN_GRPC_VERSION)) is older than the minimum required (v$(GEN_GRPC_MIN_VERSION))."; \
-		exit 1; \
-	fi
-
-.PHONY: check-gen-grpc-version

buf.gen.yaml

@@ -0,0 +1,19 @@
+version: v2
+
+managed:
+  enabled: true
+
+inputs:
+  - directory: proto
+
+plugins:
+  - local: [go, tool, google.golang.org/protobuf/cmd/protoc-gen-go]
+    out: .
+    opt:
+      - module=github.com/smallstep/linkedca
+
+  - local: [go, tool, google.golang.org/grpc/cmd/protoc-gen-go-grpc]
+    out: .
+    opt:
+      - module=github.com/smallstep/linkedca
+      - require_unimplemented_servers=true

buf.yaml

@@ -0,0 +1,12 @@
+version: v2
+
+lint:
+  use:
+    - STANDARD
+
+breaking:
+  use:
+    - FILE
+
+modules:
+  - path: proto