# Files are installed under $(DESTDIR)/$(PREFIX)

PREFIX ?= /usr/local

DEST := $(shell echo "$(DESTDIR)/$(PREFIX)" | sed 's:///*:/:g; s://*$$::')

VERSION ?=$(shell git describe --match 'v[0-9]*' --dirty='.m' --always --tags)

VERSION_TRIMMED := $(VERSION:v%=%)

VERSION_SYMBOL := github.com/AkihiroSuda/alcless/cmd/alclessctl/version.Version

export SOURCE_DATE_EPOCH ?= $(shell git log -1 --pretty=%ct)

# BSD date (macOS) uses `-r EPOCH`; GNU date (Linux) uses `-d @EPOCH`.

SOURCE_DATE_EPOCH_TOUCH := $(shell date -r $(SOURCE_DATE_EPOCH) +%Y%m%d%H%M.%S 2>/dev/null || date -d @$(SOURCE_DATE_EPOCH) +%Y%m%d%H%M.%S)

GO ?= go

# Keep symbols by default, for supporting gomodjail

# https://github.com/AkihiroSuda/gomodjail

KEEP_SYMBOLS ?= 1

GO_BUILD_LDFLAGS_S := true

ifeq ($(KEEP_SYMBOLS),1)

GO_BUILD_LDFLAGS_S = false

endif

GO_BUILD_LDFLAGS ?= -s=$(GO_BUILD_LDFLAGS_S) -w -X $(VERSION_SYMBOL)=$(VERSION)

GO_BUILD ?= $(GO) build -trimpath -ldflags="$(GO_BUILD_LDFLAGS)"

GOOS ?= $(shell $(GO) env GOOS)

GOARCH ?= $(shell $(GO) env GOARCH)

BINARIES := _output/bin/alclessctl _output/bin/alcless

TAR ?= tar

# BSD tar (macOS) and GNU tar (Linux) use different flags for reproducible

# archives. `--option !timestamp` and `gzip -n` both omit the gzip header mtime.

ifeq ($(shell $(TAR) --version 2>/dev/null | head -1 | grep -c bsdtar),1)

TAR_REPRODUCIBLE_FLAGS := --uid 0 --gid 0 --option !timestamp -czvf

else

TAR_REPRODUCIBLE_FLAGS := --owner=0 --group=0 --use-compress-program='gzip -n' -cvf

endif

.PHONY: all

all: binaries

.PHONY: binaries

binaries: $(BINARIES)

.PHONY: _output/bin/alclessctl

_output/bin/alclessctl:

$(GO_BUILD) -o "$@" ./cmd/alclessctl

.PHONY: _output/bin/alcless

_output/bin/alcless:

cp -a ./cmd/alcless "$@"

.PHONY: install

install: uninstall

mkdir -p "$(DEST)/bin"

cp -a _output/bin/alclessctl "$(DEST)/bin/alclessctl"

cp -a _output/bin/alcless "$(DEST)/bin/alcless"

.PHONY: uninstall

uninstall:

rm -f "$(DEST)/bin/alclessctl" "$(DEST)/bin/alcless"

# clean does not remove _artifacts

.PHONY: clean

clean:

rm -rf _output

define touch_recursive

find "$(1)" -exec touch -t $(SOURCE_DATE_EPOCH_TOUCH) {} +

endef

define make_artifact

make clean

GOOS=$(1) GOARCH=$(2) make

$(call touch_recursive,_output)

$(TAR) -C _output/ --no-xattrs --numeric-owner $(TAR_REPRODUCIBLE_FLAGS) _artifacts/alcless-$(VERSION_TRIMMED)-$(3)-$(4).tar.gz ./

endef

.PHONY: artifacts

artifacts:

rm -rf _artifacts

mkdir -p _artifacts

$(call make_artifact,darwin,amd64,Darwin,amd64)

$(call make_artifact,darwin,arm64,Darwin,arm64)

$(call make_artifact,linux,amd64,Linux,x86_64)

$(call make_artifact,linux,arm64,Linux,aarch64)

make clean

(cd _artifacts ; sha256sum *) > SHA256SUMS

mv SHA256SUMS _artifacts/SHA256SUMS

$(call touch_recursive,_artifacts)