Wasm cpp bazel (#446)

plugins/wasm-cpp/Makefile

@@ -0,0 +1,14 @@
+PLUGIN_NAME ?= key_auth
+BUILD_TIME := $(shell date "+%Y%m%d-%H%M%S")
+COMMIT_ID := $(shell git rev-parse --short HEAD 2>/dev/null)
+IMAGE_TAG = $(if $(strip $(PLUGIN_VERSION)),${PLUGIN_VERSION},${BUILD_TIME}-${COMMIT_ID})
+IMG ?= ${REGISTRY}${PLUGIN_NAME}:${IMAGE_TAG}
+
+.PHONY: build
+build:
+	DOCKER_BUILDKIT=1 docker build --build-arg PLUGIN_NAME=${PLUGIN_NAME} \
+	                            -t ${IMG} \
+	                            --output extensions/${PLUGIN_NAME} \
+	                            .
+	@echo ""
+	@echo "output wasm file: extensions/${PLUGIN_NAME}/plugin.wasm"