refactor(Makefile): simplify release-version logic and remove version-set

Makefile

@@ -4,7 +4,7 @@ CONFIG_DIR  := /etc/unitdore
 VERSION    := $(shell git describe --tags --always --dirty 2>/dev/null || echo "dev")
 LDFLAGS    := -ldflags "-X github.com/warkanum/unitdore/cmd.version=$(VERSION)"
 
-.PHONY: all build install uninstall test lint clean release-version version-set pkg-checksums
+.PHONY: all build install uninstall test lint clean release-version pkg-checksums
 
 all: build
 
@@ -42,15 +42,25 @@ lint:
 clean:
 	rm -f $(BINARY)
 
-## release-version: bump patch version, update source and package versions, commit, tag, and push
+# VERSION only counts as a release version when given on the command line
+# (it defaults to git describe for the build flags).
+RELEASE_VERSION := $(if $(filter command line,$(origin VERSION)),$(patsubst v%,%,$(VERSION)))
+
+## release-version: bump version (patch, or VERSION=X.Y.Z), update source and package versions, commit, tag, and push
 release-version:
-	@CURRENT=$$(git describe --tags --abbrev=0 2>/dev/null || echo "v0.0.0"); \
+	@if [ -n "$(RELEASE_VERSION)" ]; then \
+		echo "$(RELEASE_VERSION)" | grep -Eq '^[0-9]+\.[0-9]+\.[0-9]+$$' || { echo "usage: make release-version [VERSION=X.Y.Z]"; exit 1; }; \
+		PKGVER="$(RELEASE_VERSION)"; \
+	else \
+		CURRENT=$$(git describe --tags --abbrev=0 2>/dev/null || echo "v0.0.0"); \
 		MAJOR=$$(echo $$CURRENT | sed 's/v\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1/'); \
 		MINOR=$$(echo $$CURRENT | sed 's/v\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\2/'); \
 		PATCH=$$(echo $$CURRENT | sed 's/v\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\3/'); \
-	NEXT="v$$MAJOR.$$MINOR.$$((PATCH + 1))"; \
 		PKGVER="$$MAJOR.$$MINOR.$$((PATCH + 1))"; \
-	echo "Current: $$CURRENT → Next: $$NEXT"; \
+	fi; \
+	NEXT="v$$PKGVER"; \
+	if git rev-parse -q --verify "refs/tags/$$NEXT" >/dev/null; then echo "tag $$NEXT already exists"; exit 1; fi; \
+	echo "Releasing $$NEXT"; \
 	scripts/bump-version.sh "$$PKGVER"; \
 	git add -A cmd/root.go pkg; \
 	git commit -m "chore(release): update package version to $$PKGVER"; \
@@ -58,12 +68,6 @@ release-version:
 	git push origin HEAD "$$NEXT"; \
 	echo "Pushed $$NEXT — release workflow triggered"
 
-## version-set: set version in source and package files, no commit/tag (make version-set NEW_VERSION=X.Y.Z)
-version-set:
-	@echo "$(NEW_VERSION)" | grep -Eq '^[0-9]+\.[0-9]+\.[0-9]+$$' || { echo "usage: make version-set NEW_VERSION=X.Y.Z"; exit 1; }
-	scripts/bump-version.sh "$(NEW_VERSION)"
-	@echo "Version set to $(NEW_VERSION) — review with 'git diff', then commit"
-
 ## pkg-checksums: fill the Void checksum from the published release (run after release)
 pkg-checksums:
 	scripts/update-checksums.sh