Makefile

.DEFAULT_GOAL = build
extension = $(patsubst windows,.exe,$(filter windows,$(1)))
GO := go
PKG_NAME := ec2list
PREFIX := .

COMMIT ?= `git rev-parse --short HEAD 2>/dev/null`
VERSION ?= `git describe --abbrev=0 --tags $(git rev-list --tags --max-count=1) 2>/dev/null | sed 's/v\(.*\)/\1/'`
BUILD_DATE ?= `date -u +"%Y-%m-%dT%H:%M:%SZ"`

COMMIT_FLAG := -X `go list ./version`.GitCommit=$(COMMIT)
VERSION_FLAG := -X `go list ./version`.Version=$(VERSION)

GOOS ?= $(shell go version | sed 's/^.*\ \([a-z0-9]*\)\/\([a-z0-9]*\)/\1/')
GOARCH ?= $(shell go version | sed 's/^.*\ \([a-z0-9]*\)\/\([a-z0-9]*\)/\2/')

platforms := linux-amd64
compressed-platforms := linux-amd64-slim

clean:
	rm -Rf $(PREFIX)/bin/*

build-x: $(patsubst %,$(PREFIX)/bin/$(PKG_NAME)_%,$(platforms))

compress-all: $(patsubst %,$(PREFIX)/bin/$(PKG_NAME)_%,$(compressed-platforms))

$(PREFIX)/bin/$(PKG_NAME)_%-slim: $(PREFIX)/bin/$(PKG_NAME)_%
	upx --lzma $< -o $@

$(PREFIX)/bin/$(PKG_NAME)_%-slim.exe: $(PREFIX)/bin/$(PKG_NAME)_%.exe
	upx --lzma $< -o $@

compress: $(PREFIX)/bin/$(PKG_NAME)_$(GOOS)-$(GOARCH)-slim$(call extension,$(GOOS))
	cp $< $(PREFIX)/bin/$(PKG_NAME)-slim$(call extension,$(GOOS))


$(PREFIX)/bin/$(PKG_NAME)_%: $(shell find $(PREFIX) -type f -name '*.go')
	GOOS=$(shell echo $* | cut -f1 -d-) GOARCH=$(shell echo $* | cut -f2 -d- | cut -f1 -d.) CGO_ENABLED=0 \
		$(GO) build \
			-ldflags "-w -s $(COMMIT_FLAG) $(VERSION_FLAG)" \
			-o $@

$(PREFIX)/bin/$(PKG_NAME)$(call extension,$(GOOS)): $(PREFIX)/bin/$(PKG_NAME)_$(GOOS)-$(GOARCH)$(call extension,$(GOOS))
	cp $< $@

build: $(PREFIX)/bin/$(PKG_NAME)$(call extension,$(GOOS))

test:
	$(GO) test -mod=vendor -v -race ./...

.PHONY: gen-changelog clean test build-x compress-all build-release
.DELETE_ON_ERROR:
.SECONDARY: