Add linters to CI

.circleci/config.yml

@@ -1,10 +1,24 @@
 version: 2
 jobs:
-  build:
+  validate:
     docker:
-      # specify the version
       - image: circleci/golang:1.10
+    working_directory: /go/src/github.com/virtual-kubelet/virtual-kubelet
+    steps:
+      - checkout
+      - run:
+          name: Install linters
+          command: curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | bash -s v1.10.2 && mv ./bin/* /go/bin/
+      - run:
+          name: Lint
+          command: golangci-lint run --new-from-rev "HEAD~$(git rev-list master.. --count)" ./...
+      - run:
+          name: Dependencies
+          command: scripts/validate/dep.sh
 
+  test:
+    docker:
+      - image: circleci/golang:1.10
     working_directory: /go/src/github.com/virtual-kubelet/virtual-kubelet
     steps:
       - checkout
@@ -15,12 +29,16 @@ jobs:
           echo 'export AZURE_AUTH_LOCATION=${outputPathCredsfile}' >> $BASH_ENV
       - run: |
           echo 'export KUBECONFIG=${outputPathKubeConfigFile}' >> $BASH_ENV
-      - run:
-          name: Dependencies
-          command: scripts/validate/dep.sh
       - run:
           name: Build
           command: V=1 make build
       - run:
           name: Tests
           command: V=1 CI=1 SKIP_AWS_E2E=1 make test
+
+workflows:
+  version: 2
+  validate_and_test:
+    jobs:
+      - validate
+      - test

.golangci.yml

@@ -0,0 +1,13 @@
+linter-settings:
+  lll:
+    line-length: 200
+
+linters:
+  disable-all: true
+  enable:
+    - errcheck
+    - govet
+    - ineffassign
+    - golint
+    - goconst
+    - goimports