ifndef GOPATH
$(error GOPATH is undefined)
endif

UNAME_S := $(shell uname -s)
ifeq ($(UNAME_S),Darwin)
	GOOS := darwin
else ifeq ($(UNAME_S),Linux)
	GOOS := linux
endif

ifneq ($(shell uname -m),x86_64)
$(error "Build on $(UNAME_M) is not supported, yet.")
endif

SOURCES   := $(wildcard *.go */*.go)
BINDIR    := ../bin

BINARY32  := fzf-$(GOOS)_386
BINARY64  := fzf-$(GOOS)_amd64
VERSION    = $(shell fzf/$(BINARY64) --version)
RELEASE32  = fzf-$(VERSION)-$(GOOS)_386
RELEASE64  = fzf-$(VERSION)-$(GOOS)_amd64
BREW       = fzf-$(VERSION)-homebrew.tgz

all: test release

brew: ../$(BREW)

../$(BREW): release
ifneq ($(UNAME_S),Darwin)
$(error brew package must be built on OS X)
endif
	mkdir -p ../bin && \
	cp fzf/$(RELEASE64) fzf/$(RELEASE32) ../bin && \
	cd .. && ln -sf . fzf-$(VERSION) && \
	tar -cvzf $(BREW) \
		fzf-$(VERSION)/{{,un}install,fzf-completion.{ba,z}sh,LICENSE} \
		fzf-$(VERSION)/{plugin/fzf.vim,bin/{$(RELEASE64),$(RELEASE32)}} && \
	rm fzf-$(VERSION) && \
	openssl sha1 $(notdir $@)

release: build
	cd fzf && \
	cp $(BINARY32) $(RELEASE32) && tar -czf $(RELEASE32).tgz $(RELEASE32) && \
	cp $(BINARY64) $(RELEASE64) && tar -czf $(RELEASE64).tgz $(RELEASE64)

build: fzf/$(BINARY32) fzf/$(BINARY64)

test:
	go get
	go test -v ./...

install: $(BINDIR)/fzf

uninstall:
	rm -f $(BINDIR)/fzf $(BINDIR)/$(BINARY64)

clean:
	cd fzf && rm -f $(BINARY32) $(BINARY64) $(RELEASE32).tgz $(RELEASE64).tgz

fzf/$(BINARY32): $(SOURCES)
	cd fzf && GOARCH=386 CGO_ENABLED=1 go build -o $(BINARY32)

fzf/$(BINARY64): $(SOURCES)
	cd fzf && go build -o $(BINARY64)

$(BINDIR)/fzf: fzf/$(BINARY64) | $(BINDIR)
	cp -f fzf/$(BINARY64) $(BINDIR)
	cd $(BINDIR) && ln -sf $(BINARY64) fzf

$(BINDIR):
	mkdir -p $@

# Linux distribution to build fzf on
DISTRO := arch

docker:
	docker build -t junegunn/$(DISTRO)-sandbox - < Dockerfile.$(DISTRO)

linux: docker
	docker run -i -t -v $(GOPATH):/go junegunn/$(DISTRO)-sandbox \
		/bin/bash -ci 'cd /go/src/github.com/junegunn/fzf/src; make'

$(DISTRO): docker
	docker run -i -t -v $(GOPATH):/go junegunn/$(DISTRO)-sandbox \
		sh -c 'cd /go/src/github.com/junegunn/fzf/src; /bin/bash'

.PHONY: all brew build release test install uninstall clean docker linux $(DISTRO)