adds initial multi-platform docker build support

Makefile

@@ -0,0 +1,115 @@
+MAKEFLAGS += --no-builtin-rules
+
+.PHONY: default
+default: all
+
+## Overridable defaults
+
+$(VERBOSE)SILENT ?= @
+PROJECT_ROOT ?= .
+OUT ?= $(PROJECT_ROOT)/.build
+VERSION ?= $(shell cat $(PROJECT_ROOT)/VERSION)
+NPROC ?= $(shell nproc)
+DOCKER ?= docker
+DOCKER_RUNUSER ?= $(shell id -u)
+DOCKER_RUNGROUP ?= $(shell id -g)
+
+UBUNTU_CODENAME ?= bionic
+
+MARCH_AMD64 := $(filter-out amd64,$(MARCH))
+MARCH_ARM32V7 := $(filter-out arm32v7,$(MARCH))
+
+## Defaults
+
+$(MARCH_AMD64)TARGETS += wsfs-builder-amd64-ubuntu
+$(MARCH_ARM32V7)TARGETS += wsfs-builder-arm32v7-ubuntu
+
+DOCKER_RUNFLAGS += --interactive
+DOCKER_RUNFLAGS += --rm
+DOCKER_RUNFLAGS += --tty
+DOCKER_RUNFLAGS += --init 
+DOCKER_RUNFLAGS += --user $(DOCKER_RUNUSER):$(DOCKER_RUNGROUP)
+DOCKER_RUNFLAGS += --device /dev/fuse --cap-add SYS_ADMIN --security-opt apparmor:unconfined
+DOCKER_RUNFLAGS += --env SOURCE_DATE_EPOCH
+
+DOCKER_BUILDARGS += CODENAME=$(CODENAME)
+DOCKER_BUILDARGS += NPROC=$(NPROC)
+
+DOCKER_BUILDFLAGS += $(addprefix --build-arg ,$(DOCKER_BUILDARGS))
+
+OUT_DIRS += $(OUT)
+OUT_DIRS += $(OUT)/docker
+OUT_DIRS += $(addprefix $(OUT)/,$(TARGETS))
+
+PROJECT_RESOURCES = $(call glob_files,$(PROJECT_ROOT)/**)
+
+ALL_TARGETS += $(addprefix compile-,$(TARGETS)) 
+CHECK_TARGETS += $(addprefix check-,$(TARGETS))
+CONFIGURE_TARGETS += $(addsuffix /CMakeCache.txt,$(addprefix $(OUT)/,$(TARGETS)))
+
+## Helper macros
+
+# $(call glob,include_pattern...,exclude_regex...,flags...)
+glob = $(shell bash -c 'shopt -s globstar nullglob && find $1 -maxdepth 0 $3 | grep -v $(addprefix -e, $2)')
+# $(call glob_files,include_pattern...,exclude_regex...)
+glob_files = $(call glob,$1,^$(OUT) $2,-type f)
+
+## Force eager evaluation
+
+DOCKER_RUNGROUP := $(DOCKER_RUNGROUP)
+VERSION := $(VERSION)
+PROJECT_ROOT := $(PROJECT_ROOT)
+OUT := $(OUT)
+
+## Special targets
+
+.PRECIOUS: $(OUT)/docker/%
+.DELETE_ON_ERROR: $(OUT)/%/CMakeCache.txt $(OUT)/docker/%
+
+## Targets
+
+.PHONY: all
+all: $(ALL_TARGETS)
+
+.PHONY: check
+check: $(CHECK_TARGETS)
+
+.PHONY: clean
+clean: $(CLEAN_TARGETS)
+	$(SILENT)-rm -rf $(OUT_DIRS)
+
+.PHONY: configure
+configure: $(CONFIGURE_TARGETS) 
+
+%-ubuntu: CODENAME := $(UBUNTU_CODENAME)
+
+$(OUT)/docker/%: $(PROJECT_ROOT)/docker/%.dockerfile $(PROJECT_RESOURCES) | $(OUT_DIRS)
+	$(SILENT)$(DOCKER) build --rm $(DOCKER_BUILDFLAGS) --iidfile $@ --file $< --tag $*:$(VERSION) $(dir $<)
+
+$(OUT)/%/CMakeCache.txt: $(PROJECT_ROOT)/CMakeLists.txt $(OUT)/docker/% | $(OUT_DIRS)
+	$(SILENT)$(DOCKER) run $(DOCKER_RUNFLAGS) \
+	  --volume '$(realpath $(PROJECT_ROOT)):/tmp' \
+	  --volume '$(realpath $(dir $@)):/tmp/out' \
+	  --workdir /tmp/out \
+	  $*:$(VERSION) \
+	  cmake -GNinja $(CMAKEFLAGS) .. && touch $@
+
+$(CHECK_TARGETS): GLOAS := test
+$(CHECK_TARGETS): DOCKER_RUNUSER := test
+
+check-%: compile-%;
+
+compile-%: $(OUT)/%/CMakeCache.txt
+	$(SILENT)$(DOCKER) run $(DOCKER_RUNFLAGS) \
+	  --volume '$(realpath $(PROJECT_ROOT)):/tmp' \
+	  --volume '$(realpath $(dir $^)):/tmp/out' \
+	  --workdir /tmp/out \
+	  $*:$(VERSION) \
+	  ninja -j$(NPROC) $(GLOAS)
+
+$(OUT_DIRS):
+	$(SILENT)mkdir -p $@
+
+debug-print-%:
+	@printf '%s\n' '$*:' $($*)
+