Makefile: unconditionally build plugins

Changes the build targets of plugins to effectively "phony", always
unconditionally running the build without trying to check dependencies.
The previous make targets were faulty, e.g. changing something in the
library didn't rebuild the plugins. This is a simple and stupid fix that
I believe is good enough - building the plugins is really fast and
go compiler caching makes it super fast for "unnecessary" builds.

Signed-off-by: Markus Lehtonen <markus.lehtonen@intel.com>

Author: marquiz

Makefile

@@ -40,16 +40,16 @@ BIN_PATH      := $(BUILD_PATH)/bin
 COVERAGE_PATH := $(BUILD_PATH)/coverage
 
 PLUGINS := \
-	$(BIN_PATH)/logger \
-	$(BIN_PATH)/device-injector \
-	$(BIN_PATH)/hook-injector \
-	$(BIN_PATH)/differ \
-	$(BIN_PATH)/ulimit-adjuster \
-	$(BIN_PATH)/v010-adapter \
-	$(BIN_PATH)/template \
-	$(BIN_PATH)/wasm \
-	$(BIN_PATH)/network-device-injector \
-	$(BIN_PATH)/network-logger
+	logger \
+	device-injector \
+	hook-injector \
+	differ \
+	ulimit-adjuster \
+	v010-adapter \
+	template \
+	wasm \
+	network-device-injector \
+	network-logger
 
 ifneq ($(V),1)
   Q := @
@@ -75,7 +75,7 @@ test: test-gopkgs
 
 build-proto: $(PROTO_GOFILES)
 
-build-plugins: $(PLUGINS)
+build-plugins: $(foreach plugin,$(PLUGINS),build-plugin-$(plugin))
 
 build-check:
 	$(Q)$(GO_BUILD) -v $(GO_MODULES)
@@ -89,7 +89,7 @@ mod-tidy:
 #
 
 clean-plugins:
-	$(Q)rm -f $(PLUGINS)
+	$(Q)rm -f $(foreach plugin,$(PLUGINS),$(BIN_PATH)/$(plugin))
 
 clean-cache:
 	$(Q)$(GO_CMD) clean -cache -testcache
@@ -98,14 +98,15 @@ clean-cache:
 # plugins build targets
 #
 
-$(BIN_PATH)/%: plugins/%/*
-	$(Q)echo "Building $@..."; \
-	cd $(dir $<) && $(GO_BUILD) -o $@ .
+build-plugin-%:
+	$(Q)echo "Building plugin $*..."; \
+	cd plugins/$* && $(GO_BUILD) -o $(BIN_PATH)/$* .
 
-$(BIN_PATH)/wasm: plugins/wasm/
-	$(Q)echo "Building $@..."; \
+.PHONY: build-plugin-wasm
+build-plugin-wasm:
+	$(Q)echo "Building plugin wasm..."; \
 	mkdir -p $(BIN_PATH) && \
-	cd $(dir $<) && GOOS=wasip1 GOARCH=wasm $(GO_BUILD) -o $@ -buildmode=c-shared .
+	cd plugins/wasm && GOOS=wasip1 GOARCH=wasm $(GO_BUILD) -o $(BIN_PATH)/wasm -buildmode=c-shared .
 
 #
 # test targets

plugins/Dockerfile

@@ -27,7 +27,7 @@ RUN --mount=type=cache,target=/go/pkg/mod/ go mod download
 COPY . .
 
 RUN --mount=type=cache,target=/go/pkg/mod/ \
-    make /go/src/build/bin/${PLUGIN} \
+    make build-plugin-${PLUGIN} \
     GO_BUILD="CGO_ENABLED=0 go build -ldflags '-extldflags=-static'"
 
 # Construct final image