travis: add linter

Signed-off-by: Luis Gustavo S. Barreto <gustavo@ossystems.com.br>

.travis.yml

@@ -1,27 +1,30 @@
-language: go
-
-go_import_path: github.com/UpdateHub/updatehub-ce
-
-addons:
-  apt:
-    sources:
-      - sourceline: 'ppa:masterminds/glide'
-    packages:
-      - libarchive-dev
-      - glide
-
 matrix:
   include:
-    - go: "1.10.x"
-      install:
+    - language: go
+      go:
+        - "1.11.x"
+      addons:
+        apt:
+          sources:
+            - sourceline: 'ppa:masterminds/glide'
+          packages:
+            - libarchive-dev
+            - glide
+      env:
+        - GO111MODULE=on
+      go_import_path: github.com/UpdateHub/updatehub-ce
+      install: true
+      before_install:
         - glide install
       script:  go test -v ./...
-    - go: "1.11.x"
-      script: go test -v ./...
-  allow_failures:
-    - go: master
-
-env:
-  - GO111MODULE=on
-
-install: true
+    - language: node_js
+      node_js:
+        - "12.0"
+      before_install:
+        - curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --version "1.15.2"
+        - export PATH="$HOME/.yarn/bin:$PATH"
+        - cd ui
+      install:
+        - yarn install
+      script:
+        - yarn run lint --no-fix

ui/src/components/PackageDetails.vue

@@ -125,17 +125,17 @@ export default {
       return this.$http
         .get('/api/packages/' + this.$route.params.uid)
         .then(res => {
-          return res.data;
-        });
+          return res.data
+        })
     },
 
-     deletePackage() {
+    deletePackage () {
       this.$http
-      .delete("/api/packages/" + this.$route.params.uid + "/delete")
-      .then(res => {
-        this.$router.push("/packages");
-      });
-    },
+        .delete('/api/packages/' + this.$route.params.uid + '/delete')
+        .then(res => {
+          this.$router.push('/packages')
+        })
+    }
   },
 
   filters: {

ui/src/main.js

@@ -13,19 +13,19 @@ import RolloutList from './components/RolloutList'
 import RolloutNew from './components/RolloutNew'
 import RolloutDetails from './components/RolloutDetails'
 
-function errorResponseHandler(error) {
+function errorResponseHandler (error) {
   if (error.response.status === 401) {
-    app.currentUser = null;
-    router.push("/login?redirect=" + "/")
+    app.currentUser = null
+    router.push('/login?redirect=' + '/')
   }
 }
 
 Axios.interceptors.response.use(
   response => response,
   errorResponseHandler
-);
+)
 
-Vue.config.productionTip = false;
+Vue.config.productionTip = false
 
 Vue.prototype.$http = Axios