Add golangci-lint to Travis build

Author: oschwald

.golangci.toml

@@ -0,0 +1,30 @@
+[run]
+  deadline = "10m"
+  tests = true
+
+[linters]
+  disable-all = true
+  enable = [
+    "deadcode",
+    "depguard",
+    "errcheck",
+    "goconst",
+    "gocyclo",
+    "gocritic",
+    "gofmt",
+    "golint",
+    "gosec",
+    "gosimple",
+    "ineffassign",
+    "maligned",
+    "misspell",
+    "nakedret",
+    "staticcheck",
+    "structcheck",
+    "typecheck",
+    "unconvert",
+    "unparam",
+    "varcheck",
+    "vet",
+    "vetshadow",
+  ]

.travis.yml

@@ -17,12 +17,15 @@ matrix:
   allow_failures:
     - go: tip
 
-before_install:
-  - "if [[ $TRAVIS_GO_VERSION == 1.11 ]]; then go get -u golang.org/x/lint/golint; fi"
-
 install:
   - go get -v -t ./...
 
+before_script:
+  - |
+    if [[ $TRAVIS_GO_VERSION == 1.12 && $(arch) != 'ppc64le' ]]; then
+      curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(go env GOPATH)/bin
+    fi
+
 script:
   - |
     if [ $(arch) == "ppc64le" ]; then
@@ -36,7 +39,9 @@ script:
     else
       go test -race -v -tags appengine
     fi
-  - "if [[ $TRAVIS_GO_VERSION == 1.11 ]]; then go vet ./...; fi"
-  - "if [[ $TRAVIS_GO_VERSION == 1.11 ]]; then golint .; fi"
+  - |
+    if [[ $TRAVIS_GO_VERSION == 1.12 && $(arch) != 'ppc64le' ]]; then
+      golangci-lint run
+    fi
 
 sudo: false