VERS_MAJOR := 0
VERS_MINOR := 3
VERSION := $(VERS_MAJOR).$(VERS_MINOR)
NEW_MINOR := $$(( $(VERS_MINOR) + 1 ))
NEW_MAJOR := $$(( $(VERS_MAJOR) + 1 ))

output:

output/sendmail: output
	go build -o output/sendmail -ldflags "-X main.version=$(VERSION)" ./...

build: output/sendmail

bumpvers-minor:
	sed -i"" "s/VERS_MINOR := $(VERS_MINOR)/VERS_MINOR := $(NEW_MINOR)/" Makefile
	git add Makefile
	git commit -m "Bump version $(VERSION) -> $(VERS_MAJOR).$(NEW_MINOR)"
	git tag $(VERS_MAJOR).$(NEW_MINOR)

bumpvers-major:
	sed -i"" "s/VERS_MAJOR := $(VERS_MAJOR)/VERS_MAJOR := $$(( $(VERS_MAJOR) + 1 ))/" Makefile
	git add Makefile
	git commit -m "Bump version $(VERSION) -> $(NEW_MAJOR).$(VERS_MINOR)"
	git tag $(NEW_MAJOR).$(VERS_MINOR)

release-min:
	make bumpvers-minor
	make build

release-maj:
	make bumpvers-major
	make build

PHONY: bumpvers-minor bumpvers-major release-min release-maj