switch to golangci config; simplify Makefile (#6)

* switch to golangci config; simplify Makefile

* use variable for golangci-lint

Author: jmrodri

.golangci.yml

@@ -0,0 +1,24 @@
+linters:
+  disable-all: true
+  enable:
+    - nakedret
+    - interfacer
+    - varcheck
+    - deadcode
+    - structcheck
+    - misspell
+    - maligned
+    - ineffassign
+    - goconst
+    - goimports
+    - errcheck
+    - unparam
+    - golint
+    - staticcheck
+    - gosimple
+    - unused
+    - govet
+    - typecheck
+
+run:
+  deadline: 5m

Makefile

@@ -9,25 +9,7 @@ build: $(SOURCES) ## Build Test
 	go build -i -ldflags="-s -w" ./...
 
 lint: golangci-lint ## Run golint
-	@golangci-lint run --disable-all \
-		--deadline 5m \
-		--enable=nakedret \
-		--enable=interfacer \
-		--enable=varcheck \
-		--enable=deadcode \
-		--enable=structcheck \
-		--enable=misspell \
-		--enable=maligned \
-		--enable=ineffassign \
-		--enable=goconst \
-		--enable=goimports \
-		--enable=errcheck \
-		--enable=dupl \
-		--enable=unparam \
-		--enable=golint \
-		--enable=staticcheck \
-		--enable=unused \
-		--enable=gosimple \
+	@$(GOLANGCI_LINT) run
 
 fmt: ## Run go fmt
 	@gofmt -d $(SOURCES)