Added lint

.drone.yml

@@ -16,6 +16,7 @@ steps:
     image: vikunja/golang-build:latest
     pull: true
     commands:
+      - make lint
       - make build
     when:
       event: [ push, tag, pull_request ]

Makefile

@@ -122,4 +122,11 @@ release-copy:
 
 .PHONY: release-check
 release-check:
-	cd $(DIST)/release; $(foreach file,$(wildcard $(DIST)/release/$(EXECUTABLE)-*),sha256sum $(notdir $(file)) > $(notdir $(file)).sha256;)
+	cd $(DIST)/release; $(foreach file,$(wildcard $(DIST)/release/$(EXECUTABLE)-*),sha256sum $(notdir $(file)) > $(notdir $(file)).sha256;)
+
+.PHONY: lint
+lint:
+	@hash golint > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
+		go install $(GOFLAGS) golang.org/x/lint/golint; \
+	fi
+	for PKG in $(PACKAGES); do golint -set_exit_status $$PKG || exit 1; done;