chore: add Makefile

.gitignore

@@ -1,4 +1,5 @@
 bin
+dist
 go.sum
 fetchcert
 fetch-certificates.yml

Makefile

@@ -0,0 +1,130 @@
+BINNAME = fetchcert
+BINDIR = $(CURDIR)/bin
+DISTDIR = $(CURDIR)/dist
+TARGETS = linux/amd64 linux/386 linux/arm linux/arm64
+STATICFILES = README.md COPYING fetch-certificates.example.yml
+
+SRC := $(shell find . -type f -name '*.go' -not -path './dist/*' -print) go.mod go.sum
+GOHOSTOS = $(shell go env GOHOSTOS)
+GOHOSTARCH ?= $(shell go env GOHOSTARCH)
+
+GIT_TAG    = $(shell git describe --tags --abbrev=0 --exact-match 2>/dev/null)
+GIT_COMMIT ?= $(shell git rev-parse --short HEAD 2>/dev/null)
+GIT_STATUS ?= $(shell test -n "`git status --porcelain`" && echo "dirty" || echo "clean")
+
+ifneq ($(VERSION),)
+	BINARY_VERSION = $(VERSION)
+endif
+BINARY_VERSION ?= $(GIT_TAG)
+
+LDFLAGS += -w -s
+ifneq ($(BINARY_VERSION),)
+	LDFLAGS += -X main.version=${BINARY_VERSION}
+endif
+LDFLAGS += -X main.commit=${GIT_COMMIT}
+LDFLAGS += -X main.status=${GIT_STATUS}
+
+# Use bash as the shell, mostly for -o pipefail
+SHELL = /usr/bin/env bash
+
+
+.PHONY: all
+all: build
+
+# ---------------
+# Basic building
+
+.PHONY: build
+build: GOOS=$(GOHOSTOS)
+build: GOARCH=$(GOHOSTARCH)
+build: build-target symlink
+
+.PHONY: symlink
+symlink:
+	@ln -sf $(BINDIR)/$(GOOS)-$(GOARCH)/$(BINNAME) $(BINDIR)/$(BINNAME)
+
+.PHONY: build-target
+build-target: LDFLAGS += -X main.target=${GOOS}/${GOARCH}
+build-target: $(BINDIR)/$(GOOS)-$(GOARCH)/$(BINNAME)
+
+$(BINDIR)/$(GOOS)-$(GOARCH)/$(BINNAME): $(SRC)
+	@mkdir -p $(BINDIR)/$(GOOS)-$(GOARCH)
+	@CGO_ENABLED=0 go build -ldflags "$(LDFLAGS)" -o $(BINDIR)/$(GOOS)-$(GOARCH)/$(BINNAME) .
+
+.PHONY: test
+test:
+	@go test -v ./...
+
+.PHONY: lint
+lint:
+	@go run -modfile=tools/go.mod github.com/golangci/golangci-lint/cmd/golangci-lint run
+
+# ----------------
+# Cross compiling
+
+.PHONY: build-cross
+build-cross:
+	@for target in $(TARGETS); do \
+		$(MAKE) build-target GOOS=`echo $$target | cut -d / -f 1` GOARCH=`echo $$target | cut -d / -f 2`; \
+	done
+
+# ----------
+# Packaging
+
+.PHONY: dist
+dist: GOOS=$(GOHOSTOS)
+dist: GOARCH=$(GOHOSTARCH)
+dist: dist-target
+
+.PHONY: dist-all
+dist-all: dist-source
+	@set -eu -o pipefail; \
+	for target in $(TARGETS); do \
+		$(MAKE) dist-target GOOS=`echo $$target | cut -d / -f 1` GOARCH=`echo $$target | cut -d / -f 2`; \
+	done; \
+	mkdir -p $(DISTDIR)/release; \
+	mv $(DISTDIR)/$(BINNAME)-$(BINARY_VERSION)*.tar.xz $(DISTDIR)/release
+
+.PHONY: dist-source
+dist-source:
+	@set -eu -o pipefail; \
+	if [ -z "$(BINARY_VERSION)" ]; then \
+		echo "No version set"; \
+		exit 1; \
+	fi; \
+	rm -rf $(DISTDIR)/$(BINNAME)-$(BINARY_VERSION); \
+	mkdir -p $(DISTDIR)/$(BINNAME)-$(BINARY_VERSION); \
+	for f in $(SRC) $(STATICFILES); do \
+		install -m 644 -D $$f $(DISTDIR)/$(BINNAME)-$(BINARY_VERSION)/$$f; \
+	done; \
+	( \
+		echo "VERSION = ${BINARY_VERSION}"; \
+		echo "GIT_COMMIT = ${GIT_COMMIT}"; \
+		echo "GIT_STATUS = ${GIT_STATUS}"; \
+		cat Makefile; \
+	) > $(DISTDIR)/$(BINNAME)-$(BINARY_VERSION)/Makefile; \
+	cd $(DISTDIR); \
+	tar cJf $(BINNAME)-$(BINARY_VERSION).tar.xz $(BINNAME)-$(BINARY_VERSION)
+
+.PHONY: dist-target
+dist-target: build-target
+	@set -eu -o pipefail; \
+	if [ -z "$(BINARY_VERSION)" ]; then \
+		echo "No version set"; \
+		exit 1; \
+	fi; \
+	rm -rf $(DISTDIR)/$(BINNAME)-$(BINARY_VERSION)-$(GOOS)-$(GOARCH); \
+	mkdir -p $(DISTDIR)/$(BINNAME)-$(BINARY_VERSION)-$(GOOS)-$(GOARCH); \
+	cp $(BINDIR)/$(GOOS)-$(GOARCH)/$(BINNAME) $(DISTDIR)/$(BINNAME)-$(BINARY_VERSION)-$(GOOS)-$(GOARCH); \
+	for f in $(STATICFILES); do \
+		cp $$f $(DISTDIR)/$(BINNAME)-$(BINARY_VERSION)-$(GOOS)-$(GOARCH); \
+	done; \
+	cd $(DISTDIR); \
+	tar cJf $(BINNAME)-$(BINARY_VERSION)-$(GOOS)-$(GOARCH).tar.xz $(BINNAME)-$(BINARY_VERSION)-$(GOOS)-$(GOARCH)
+
+# --------
+# Cleanup
+
+.PHONY: clean
+clean:
+	@rm -rf $(BINDIR) $(DISTDIR)