Provides explicit makefile targets for files (#167)

fixes #165

`init` depends on `vminitd/bin/vminitd`, `vminitd/bin/vmexec`, and
`bin/cctl`
`integration` depends on `bin/containerization-integration`
`bin/*` get generated via `make containerization`

Author: madrob

Makefile

@@ -40,33 +40,39 @@ release: BUILD_CONFIGURATION = release
 release: all
 
 .PHONY: containerization
-containerization:
+containerization: bin/cctl bin/containerization-integration
+
+.PHONY: swift-build
+swift-build:
 	@echo Building containerization binaries...
-	@mkdir -p bin
 	@$(SWIFT) build -c $(BUILD_CONFIGURATION)
 
-	@echo Copying containerization binaries...
-	@install $(BUILD_BIN_DIR)/cctl ./bin/
-	@install $(BUILD_BIN_DIR)/containerization-integration ./bin/
+$(BUILD_BIN_DIR)/cctl $(BUILD_BIN_DIR)/containerization-integration:
+	@"$(MAKE)" swift-build
 
-	@echo Signing containerization binaries...
-	@codesign --force --sign - --timestamp=none --entitlements=signing/vz.entitlements bin/cctl
-	@codesign --force --sign - --timestamp=none --entitlements=signing/vz.entitlements bin/containerization-integration
+bin/%: $(BUILD_BIN_DIR)/%
+	@mkdir -p bin/
+	@install $< bin/
+	@codesign --force --sign - --timestamp=none --entitlements=signing/vz.entitlements $@
 
+init := bin/init.rootfs.tar.gz
 .PHONY: init
-init: vminitd
+init: $(init)
+
+$(init): vminitd/bin/vminitd vminitd/bin/vmexec bin/cctl
 	@echo Creating init.ext4...
-	@rm -f bin/init.rootfs.tar.gz bin/init.block
-	@./bin/cctl rootfs create --vminitd vminitd/bin/vminitd --labels org.opencontainers.image.source=https://github.com/apple/containerization --vmexec vminitd/bin/vmexec bin/init.rootfs.tar.gz vminit:latest
+	@rm -f $(init) bin/init.block
+	@./bin/cctl rootfs create --vminitd vminitd/bin/vminitd --labels org.opencontainers.image.source=https://github.com/apple/containerization --vmexec vminitd/bin/vmexec $(init) vminit:latest
 
 .PHONY: cross-prep
 cross-prep:
 	@"$(MAKE)" -C vminitd cross-prep
 
 .PHONY: vminitd
-vminitd:
-	@mkdir -p ./bin
-	@"$(MAKE)" -C vminitd BUILD_CONFIGURATION=$(BUILD_CONFIGURATION)
+vminitd: vminitd/bin/vminitd vminitd/bin/vmexec
+
+vminitd/bin/%:
+	@"$(MAKE)" -C vminitd BUILD_CONFIGURATION=$(BUILD_CONFIGURATION) bin/$*
 
 .PHONY: update-libarchive-source
 update-libarchive-source:
@@ -88,6 +94,10 @@ ifeq (,$(wildcard bin/vmlinux))
 	@echo No bin/vmlinux kernel found. See fetch-default-kernel target.
 	@exit 1
 endif
+	@"$(MAKE)" integration-kernel-checked
+
+.PHONY: integration-kernel-checked
+integration-kernel-checked: $(init) bin/containerization-integration
 	@echo Running the integration tests...
 	@./bin/containerization-integration --bootlog ./bin/boot.log
 

vminitd/Makefile

@@ -31,14 +31,20 @@ MACOS_RELEASE_TYPE := $(shell sw_vers | grep ReleaseType)
 .DEFAULT_GOAL := all
 
 .PHONY: all
-all: 
+all: bin/vminitd bin/vmexec
+
+.PHONY: swift-build
+swift-build:
 	@echo Building vminitd and vmexec...
-	@mkdir -p ./bin/
-	@rm -f ./bin/vminitd
-	@rm -f ./bin/vmexec
 	@swift build -c $(BUILD_CONFIGURATION) $(SWIFT_CONFIGURATION)
-	@install $(VMINITD_BIN_PATH)/vminitd ./bin/vminitd
-	@install $(VMINITD_BIN_PATH)/vmexec ./bin/vmexec
+
+$(VMINITD_BIN_PATH)/vminitd $(VMINITD_BIN_PATH)/vmexec:
+	@$(MAKE) swift-build
+
+bin/%: $(VMINITD_BIN_PATH)/%
+	@mkdir -p bin/
+	@rm -f $@
+	@install $< bin/
 
 .PHONY: cross-prep
 cross-prep: linux-sdk macos-sdk