feat/version (#2)

Reviewed-on: #2

Makefile

@@ -1,7 +1,8 @@
 BINARY   := node-lookup
-GOFLAGS  := -ldflags="-s -w"
+VERSION  := $(shell git describe --tags --always --dirty 2>/dev/null || echo dev)
+GOFLAGS  := -ldflags="-s -w -X main.version=$(VERSION)"
 
-.PHONY: all build test lint clean install
+.PHONY: all build test lint clean install patch minor major _release
 
 all: build
 
@@ -19,3 +20,27 @@ clean:
 
 install:
 	go install $(GOFLAGS) ./...
+
+# Bump helpers — reads the latest semver tag and creates the next one.
+# If no tag exists yet, starts from v0.0.0.
+_LATEST := $(shell git tag --sort=-v:refname | grep -E '^v[0-9]+\.[0-9]+\.[0-9]+$$' | head -1)
+_BASE   := $(if $(_LATEST),$(_LATEST),v0.0.0)
+_MAJ    := $(shell echo $(_BASE) | sed 's/^v//' | cut -d. -f1)
+_MIN    := $(shell echo $(_BASE) | sed 's/^v//' | cut -d. -f2)
+_PAT    := $(shell echo $(_BASE) | sed 's/^v//' | cut -d. -f3)
+
+patch:
+	@NEW=v$(_MAJ).$(_MIN).$(shell expr $(_PAT) + 1); \
+	git tag $$NEW && echo "Tagged $$NEW" && $(MAKE) _release TAG=$$NEW
+
+minor:
+	@NEW=v$(_MAJ).$(shell expr $(_MIN) + 1).0; \
+	git tag $$NEW && echo "Tagged $$NEW" && $(MAKE) _release TAG=$$NEW
+
+major:
+	@NEW=v$(shell expr $(_MAJ) + 1).0.0; \
+	git tag $$NEW && echo "Tagged $$NEW" && $(MAKE) _release TAG=$$NEW
+
+_release:
+	git push origin $(TAG)
+	tea releases create --tag $(TAG) --title $(TAG)