GOFILES=$(wildcard *.go)
PROG=simpbot
#set variables
GIT_COMMIT := $(shell git rev-list -1 HEAD)
GIT_TAG := $(shell git describe --tags | cut -d- -f1)
ifeq ($(PREFIX),) # PREFIX is environment variable, but if it is not set, then set default value
	PREFIX := /usr/local
endif

$(PROG): $(GOFILES)
	go build -ldflags "-X main.GitCommit=$(GIT_COMMIT) -X main.GitTag=$(GIT_TAG)"

clean: 
	rm -f simpbot

install: $(SIMPBOT)
	install -d $(DESTDIR)$(PREFIX)/bin
	install -m 755 $(PROG) $(DESTDIR)$(PREFIX)/bin