build: add tag tasks

.editorconfig

@@ -0,0 +1,10 @@
+# EditorConfig for Makefile
+root = true
+
+[Makefile]
+indent_style = tab
+indent_size = 4
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true

Makefile

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+.PHONY: tag help
+
+help:
+	@echo "Usage: make tag [TAG=<name>] [VERSION=<number>]"
+	@echo ""
+	@echo "  TAG      - Tag prefix name (e.g., 'go-release', 'nextcloud')"
+	@echo "             Can also be set via TAG env var"
+	@echo "  VERSION  - Version number (optional, auto-increments if omitted)"
+	@echo ""
+	@echo "Examples:"
+	@echo "  make tag TAG=go-release"
+	@echo "  make tag TAG=go-release VERSION=3"
+	@echo "  TAG=nextcloud make tag"
+
+tag:
+ifndef TAG
+	$(error TAG is required. Usage: make tag TAG=<name> [VERSION=<number>])
+endif
+	@# Auto-detect version if not provided
+	$(eval VERSION ?= $(shell \
+		latest=$$(git tag --list '$(TAG)-v*' | sed 's/$(TAG)-v//' | sort -n | tail -1); \
+		if [ -z "$$latest" ]; then echo 1; else echo $$((latest + 1)); fi \
+	))
+	@# Get latest global version
+	$(eval GLOBAL_VERSION := $(shell \
+		latest=$$(git tag --list 'v*' | grep -E '^v[0-9]+$$' | sed 's/v//' | sort -n | tail -1); \
+		if [ -z "$$latest" ]; then echo 1; else echo $$((latest + 1)); fi \
+	))
+	@echo "Tagging with:"
+	@echo "  Global version: v$(GLOBAL_VERSION)"
+	@echo "  Tag version:    $(TAG)-v$(VERSION)"
+	@echo "  Latest tag:     $(TAG)-latest"
+	@echo ""
+	@# Create global version tag
+	git tag -f v$(GLOBAL_VERSION)
+	@# Create tag-specific version
+	git tag -f $(TAG)-v$(VERSION)
+	@# Remove old latest tag and re-create
+	-git tag -d $(TAG)-latest 2>/dev/null || true
+	git tag $(TAG)-latest
+	@echo ""
+	@echo "Tags created successfully!"
+	@echo "To push tags, run: git push origin v$(GLOBAL_VERSION) $(TAG)-v$(VERSION) $(TAG)-latest --force"