Add release target to Makefile

Author: thombashi

Makefile

@@ -1,8 +1,11 @@
+GIT := git
 PRE_COMMIT := pre-commit
 
 JSONNET_VERSION := v0.18.0
 GOLANGCI_VERSION := v1.46.2
 
+VERSION := v0.2.0
+
 .PHONY: fmt
 fmt:
 	@go fmt ./...
@@ -20,6 +23,12 @@ run:
 	$(PRE_COMMIT) autoupdate
 	$(PRE_COMMIT) run --all-files
 
+.PHONY: release
+release:
+	@$(GIT) fetch --tags --prune
+	@$(GIT) tag --sign -m "GPG signed $(VERSION) tag" $(VERSION)
+	@$(GIT) push --tags
+
 .PHONY: setup
 setup:
 	@go install github.com/google/go-jsonnet/cmd/jsonnet-lint@$(JSONNET_VERSION)