Configure SonarQube analysis

https://sonarqube.com/about

.travis.yml

@@ -1,16 +1,25 @@
 sudo: false
 language: java
+addons:
+  sonarqube:
+    organization: "jcgay-github"
+    token:
+      secure: "MLW7muRsJiF3Cwrqa/UFeKwNJzSd8g0WVZ30d6Yyy2egkbTiZ2M9U7/WfXQwV1Fd4lMjEOXFyrRcH3cBla4dMRG9JQLGEsBr1FGRJZZ3JiA01hTEWu9bD9vZM0pIj0X8psLZ+NoepzPWrhgMR+AUwrOSaKK95qx2ncEgWq3lAO4="
 before_install:
   - jdk_switcher use openjdk6
   - sed -i "s|\[JDK6\]|$JAVA_HOME|g" etc/toolchains.xml
   - jdk_switcher use oraclejdk8
 install:
   - mvn install -DskipTests=true -B -V -t etc/toolchains.xml
 script:
-  - mvn test -B -t etc/toolchains.xml
+  - mvn package sonar:sonar -Prun-coverage -B -t etc/toolchains.xml
 after_success:
   - "[[ ${TRAVIS_PULL_REQUEST} == 'false' ]] && [[ ${TRAVIS_TAG} == '' ]] && mvn deploy -DskipTests --settings etc/deploy-settings.xml -t etc/toolchains.xml"
   - mvn verify coveralls:report -Prun-coverage -t etc/toolchains.xml
+cache:
+  directories:
+    - '$HOME/.m2/repository'
+    - '$HOME/.sonar/cache'
 env:
   global:
     - secure: cttGV5bt0VuZZXHK0yo9rfszAjX67+pcRKMBjGuFEdr3v8uD55ho2qrXAtKEbG5x/g1atBXKD3HhBzK5Mb00XDkF93TQdX9veO6619xcVqQ7LdzPDIbbpX7lrS7vIaUaM77+hCtHFEKZs6+DVyeL93z0Vy7GiIAnRAnGomlmAwc=

README.md

@@ -85,6 +85,8 @@ Go to [Wiki](https://github.com/jcgay/maven-notifier/wiki) to read full configur
 # Build status
 [![Build Status](https://travis-ci.org/jcgay/maven-notifier.svg?branch=master)](https://travis-ci.org/jcgay/maven-notifier)
 [![Coverage Status](https://coveralls.io/repos/jcgay/maven-notifier/badge.svg?branch=master)](https://coveralls.io/r/jcgay/maven-notifier?branch=master)
+[![Quality Gate](https://sonarqube.com/api/badges/gate?key=fr.jcgay.maven:maven-notifier)](https://sonarqube.com/dashboard/index/fr.jcgay.maven:maven-notifier)
+[![Technical debt ratio](https://sonarqube.com/api/badges/measure?key=fr.jcgay.maven:maven-notifier&metric=sqale_debt_ratio)](https://sonarqube.com/dashboard/index/fr.jcgay.maven:maven-notifier)
 
 # Release