Add Makefile providing container based build workflow

Currently it needs a lot of steps to build single firmware, so lets
streamline this workflow by using container.

 Usage: make [all|build_container|build_firmware]
 Targets:
   all             Build container and firmware
   build_container Build container
   build_firmware  Build firmware
   help            Show this help message

 Options:
   build_firmware MANIFESTS=<path>  Override default manifest files (default: all .yaml/.yml files in manifests/)

 Examples:
   # Build the container image
   make build_container

   # Build all firmware manifests
   make build_firmware

   # Build a specific firmware manifest
   make build_firmware MANIFESTS=manifests/nabucasa/yellow_bootloader.yaml

Signed-off-by: Petr Štetiar <[email protected]>

Makefile

@@ -0,0 +1,65 @@
+TOPDIR = $(shell pwd)
+CONTAINER_TOOL = podman
+CONTAINER_NAME = silabs-firmware-builder
+CONTAINER_USER_GROUP = $(shell id -u):$(shell id -g)
+
+ifeq ($(CONTAINER_TOOL),docker)
+    VOLUME_OPTS=
+else
+    VOLUME_OPTS=:z
+endif
+
+define run_in_container
+	$(CONTAINER_TOOL) \
+		run --rm -it \
+		--user $(CONTAINER_USER_GROUP) \
+		-v $(TOPDIR):/build$(VOLUME_OPTS) \
+		-v $(TOPDIR)/outputs:/outputs$(VOLUME_OPTS) \
+		-v $(TOPDIR)/build_dir:/build_dir$(VOLUME_OPTS) \
+		$(CONTAINER_NAME)
+endef
+
+MANIFESTS ?= $(shell find manifests -type f \( -name "*.yaml" -o -name "*.yml" \) -print)
+
+all: build_container build_firmware
+
+help:
+	@echo "Usage: make [all|build_container|build_firmware]"
+	@echo ""
+	@echo "Targets:"
+	@echo "  all             Build container and firmware"
+	@echo "  build_container Build container"
+	@echo "  build_firmware  Build firmware"
+	@echo "  help            Show this help message"
+	@echo ""
+	@echo "Options:"
+	@echo "  build_firmware MANIFESTS=<path>  Override default manifest files (default: all .yaml/.yml files in manifests/)"
+	@echo ""
+	@echo "Examples:"
+	@echo "  # Build the container image"
+	@echo "  make build_container"
+	@echo ""
+	@echo "  # Build all firmware manifests"
+	@echo "  make build_firmware"
+	@echo ""
+	@echo "  # Build a specific firmware manifest"
+	@echo "  make build_firmware MANIFESTS=manifests/nabucasa/yellow_bootloader.yaml"
+	@echo ""
+
+./outputs ./build_dir:
+	mkdir -p $@
+ifneq ($(CONTAINER_TOOL),docker)
+	$(CONTAINER_TOOL) unshare chown -R $(shell id -u):$(shell id -g) $@
+endif
+
+build_container:
+	$(CONTAINER_TOOL) build -t $(CONTAINER_NAME) .
+
+build_firmware: ./outputs ./build_dir
+	$(run_in_container) \
+		bash -c " \
+			build_firmware.sh \
+			--build-dir /build_dir \
+			--output-dir /outputs \
+			$(foreach manifest,$(MANIFESTS),--manifest $(manifest)) \
+		"