Add Makefile

Makefile

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+# common variables
+
+SHA := $(shell git describe --match=none --always --abbrev=8 --dirty)
+TAG := $(shell git describe --tag --always --dirty --match v[0-9]\*)
+ABBREV_TAG := $(shell git describe --tags >/dev/null 2>/dev/null && git describe --tag --always --match v[0-9]\* --abbrev=0 || echo 'undefined')
+BRANCH := $(shell git rev-parse --abbrev-ref HEAD)
+ARTIFACTS := _out
+IMAGE_TAG ?= $(TAG)
+OPERATING_SYSTEM := $(shell uname -s | tr '[:upper:]' '[:lower:]')
+GOARCH := $(shell uname -m | tr '[:upper:]' '[:lower:]')
+
+ifeq ($(GOARCH),x86_64)
+  GOARCH := amd64
+endif
+REGISTRY ?= ghcr.io
+USERNAME ?= skyssolutions
+REGISTRY_AND_USERNAME ?= $(REGISTRY)/$(USERNAME)
+KRES_IMAGE ?= ghcr.io/siderolabs/kres:latest
+CONFORMANCE_IMAGE ?= ghcr.io/siderolabs/conform:latest
+
+# source date epoch of first commit
+
+INITIAL_COMMIT_SHA := $(shell git rev-list --max-parents=0 HEAD)
+SOURCE_DATE_EPOCH := $(shell git log $(INITIAL_COMMIT_SHA) --pretty=%ct)
+
+# sync bldr image with pkgfile
+
+BLDR_RELEASE := v0.3.0
+BLDR_IMAGE := ghcr.io/siderolabs/bldr:$(BLDR_RELEASE)
+BLDR := docker run --rm --user $(shell id -u):$(shell id -g) --volume $(PWD):/src --entrypoint=/bldr $(BLDR_IMAGE) --root=/src
+
+# docker build settings
+
+BUILD := docker buildx build
+PLATFORM ?= linux/amd64,linux/arm64
+PROGRESS ?= auto
+PUSH ?= false
+CI_ARGS ?=
+COMMON_ARGS = --file=Pkgfile
+COMMON_ARGS += --provenance=false
+COMMON_ARGS += --progress=$(PROGRESS)
+COMMON_ARGS += --platform=$(PLATFORM)
+COMMON_ARGS += --build-arg=SOURCE_DATE_EPOCH=$(SOURCE_DATE_EPOCH)
+COMMON_ARGS += --build-arg=PKGS_PREFIX="$(PKGS_PREFIX)"
+COMMON_ARGS += --build-arg=PKGS="$(PKGS)"
+
+# extra variables
+
+PKGS_PREFIX ?= ghcr.io/siderolabs
+PKGS ?= v1.7.0
+
+# targets defines all the available targets
+
+TARGETS = kernel
+
+# help menu
+
+export define HELP_MENU_HEADER
+# Getting Started
+
+To build this project, you must have the following installed:
+
+- git
+- make
+- docker (19.03 or higher)
+
+## Creating a Builder Instance
+
+The build process makes use of experimental Docker features (buildx).
+To enable experimental features, add 'experimental: "true"' to '/etc/docker/daemon.json' on
+Linux or enable experimental features in Docker GUI for Windows or Mac.
+
+To create a builder instance, run:
+
+	docker buildx create --name local --use
+
+If running builds that needs to be cached aggresively create a builder instance with the following:
+
+	docker buildx create --name local --use --config=config.toml
+
+config.toml contents:
+
+[worker.oci]
+  gc = true
+  gckeepstorage = 50000
+
+  [[worker.oci.gcpolicy]]
+    keepBytes = 10737418240
+    keepDuration = 604800
+    filters = [ "type==source.local", "type==exec.cachemount", "type==source.git.checkout"]
+  [[worker.oci.gcpolicy]]
+    all = true
+    keepBytes = 53687091200
+
+If you already have a compatible builder instance, you may use that instead.
+
+## Artifacts
+
+All artifacts will be output to ./$(ARTIFACTS). Images will be tagged with the
+registry "$(REGISTRY)", username "$(USERNAME)", and a dynamic tag (e.g. $(IMAGE):$(IMAGE_TAG)).
+The registry and username can be overridden by exporting REGISTRY, and USERNAME
+respectively.
+
+endef
+
+all: $(TARGETS)  ## Builds all targets defined.
+
+.PHONY: clean
+clean:  ## Cleans up all artifacts.
+	@rm -rf $(ARTIFACTS)
+
+$(ARTIFACTS):  ## Creates artifacts directory.
+	@mkdir -p $(ARTIFACTS)
+
+target-%:  ## Builds the specified target defined in the Pkgfile. The build result will only remain in the build cache.
+	@$(BUILD) --target=$* $(COMMON_ARGS) $(TARGET_ARGS) $(CI_ARGS) .
+
+local-%:  ## Builds the specified target defined in the Pkgfile using the local output type. The build result will be output to the specified local destination.
+	@$(MAKE) target-$* TARGET_ARGS="--output=type=local,dest=$(DEST) $(TARGET_ARGS)"
+
+docker-%:  ## Builds the specified target defined in the Pkgfile using the docker output type. The build result will be loaded into Docker.
+	@$(MAKE) target-$* TARGET_ARGS="$(TARGET_ARGS)"
+
+reproducibility-test-local-%:  ## Builds the specified target defined in the Pkgfile using the local output type with and without cahce. The build result will be output to the specified local destination
+	@rm -rf $(ARTIFACTS)/build-a $(ARTIFACTS)/build-b
+	@$(MAKE) local-$* DEST=$(ARTIFACTS)/build-a
+	@$(MAKE) local-$* DEST=$(ARTIFACTS)/build-b TARGET_ARGS="--no-cache"
+	@touch -ch -t $$(date -d @$(SOURCE_DATE_EPOCH) +%Y%m%d0000) $(ARTIFACTS)/build-a $(ARTIFACTS)/build-b
+	@diffoscope $(ARTIFACTS)/build-a $(ARTIFACTS)/build-b
+	@rm -rf $(ARTIFACTS)/build-a $(ARTIFACTS)/build-b
+
+.PHONY: $(TARGETS)
+$(TARGETS):
+	@$(MAKE) docker-$@ TARGET_ARGS="--tag=$(REGISTRY_AND_USERNAME)/$@:$(TAG) --push=$(PUSH)"
+
+.PHONY: deps.png
+deps.png:  ## Generates a dependency graph of the Pkgfile.
+	@$(BLDR) graph | dot -Tpng -o deps.png
+
+.PHONY: rekres
+rekres:
+	@docker pull $(KRES_IMAGE)
+	@docker run --rm --net=host --user $(shell id -u):$(shell id -g) -v $(PWD):/src -w /src -e GITHUB_TOKEN $(KRES_IMAGE)
+
+.PHONY: help
+help:  ## This help menu.
+	@echo "$$HELP_MENU_HEADER"
+	@grep -E '^[a-zA-Z%_-]+:.*?## .*$$' $(MAKEFILE_LIST) | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'
+
+.PHONY: release-notes
+release-notes:
+	mkdir -p $(ARTIFACTS)
+	@ARTIFACTS=$(ARTIFACTS) ./hack/release.sh $@ $(ARTIFACTS)/RELEASE_NOTES.md $(TAG)
+
+.PHONY: conformance
+conformance:
+	@docker pull $(CONFORMANCE_IMAGE)
+	@docker run --rm -it -v $(PWD):/src -w /src $(CONFORMANCE_IMAGE) enforce
+
+kernel-olddefconfig:
+	@$(MAKE) local-kernel-build TARGET_ARGS="--build-arg=KERNEL_TARGET=olddefconfig" PLATFORM=linux/arm64 DEST="artifacts/kernel/build"