Use .tool-versions file for global setting of golangcilint version

Author: silv-io

.github/workflows/ci.yml

@@ -26,4 +26,4 @@ jobs:
       - name: Run golangci-lint
         uses: golangci/golangci-lint-action@v7
         with:
-          version: v2.8.0
+          version-file: .tool-versions

.tool-versions

@@ -0,0 +1 @@
+golangci-lint 2.8.0

Makefile

@@ -17,13 +17,9 @@ test-integration: build
 
 mock-generate:
 	go generate ./...
-GOLANGCI_LINT_VERSION := 2.8.0
 
 lint:
-	@which golangci-lint > /dev/null || (echo "golangci-lint not found." && exit 1)
-	@INSTALLED=$$(golangci-lint version --short | sed 's/^v//'); \
-	if [ "$$INSTALLED" != "$(GOLANGCI_LINT_VERSION)" ]; then \
-		echo "golangci-lint version mismatch: installed $$INSTALLED, expected $(GOLANGCI_LINT_VERSION)"; \
-		exit 1; \
-	fi
+	@EXPECTED=$$(awk '/^golangci-lint/ {print $$2}' .tool-versions); \
+	INSTALLED=$$(golangci-lint version --short 2>/dev/null | sed 's/^v//'); \
+	[ "$$INSTALLED" = "$$EXPECTED" ] || { echo "golangci-lint $$EXPECTED required (found: $$INSTALLED)"; exit 1; }
 	golangci-lint run