Add linter to makefile and to circleci

.circleci/config.yml

@@ -8,6 +8,7 @@ jobs:
       - image: circleci/golang:1.13
     steps:
       - checkout
+      - run: curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh| sh -s -- -b $(go env GOPATH)/bin v1.20.0
       - run: make
       - persist_to_workspace:
           root: .

Makefile

@@ -1,10 +1,11 @@
-.PHONY: build test coverage install acceptance deps
+.PHONY: lint build test race coverage install acceptance deps
 
 GOCMD=go
 GOBUILD=$(GOCMD) build
 GOGET=$(GOCMD) get
 GOTEST=$(GOCMD) test
 GOTOOL=$(GOCMD) tool
+GOLANGLINT=golangci-lint
 
 BUILD_DIR=./build
 OUTPUT_DIR=./output
@@ -12,7 +13,10 @@ TMP_DIR=/tmp
 
 BINARY_NAME=kapow
 
-all: test race build
+all: lint test race build
+
+lint:
+	$(GOLANGLINT) run
 
 build: deps
 	mkdir -p $(BUILD_DIR)