add linting

.drone.yml

@@ -8,6 +8,4 @@ steps:
   commands:
   - go get -v
   - make build
-  - go get golang.org/x/lint
-  - golint ./...
-
+  - make lint

.revive.toml

@@ -0,0 +1,25 @@
+ignoreGeneratedHeader = false
+severity = "warning"
+confidence = 0.8
+errorCode = 1
+warningCode = 1
+
+[rule.blank-imports]
+[rule.context-as-argument]
+[rule.context-keys-type]
+[rule.dot-imports]
+[rule.error-return]
+[rule.error-strings]
+[rule.error-naming]
+[rule.exported]
+[rule.if-return]
+[rule.increment-decrement]
+[rule.var-naming]
+[rule.var-declaration]
+[rule.package-comments]
+[rule.range]
+[rule.receiver-naming]
+[rule.time-naming]
+[rule.unexported-return]
+[rule.indent-error-flow]
+[rule.errorf]

Makefile

@@ -42,6 +42,11 @@ clean:
 fmt:
 	go fmt *.go
 
+lint:
+	go get -u github.com/mgechev/revive
+	revive -config .revive.toml -exclude=./vendor/... ./... || exit 1
+
+
 test: build-docker-image
 
 dist: build-docker-image