add javadoc stage

Author: Vladimir Kotal

.travis.yml

@@ -80,3 +80,7 @@ jobs:
     if: repo = "oracle/opengrok" AND tag IS present
     script: dev/post-deploy.sh
     install: true
+  - stage: javadoc
+    name: Upload javadocs to Github pages
+    script: dev/javadoc.sh
+    install: true

dev/javadoc.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+set -e
+
+mvn -DskipTests=true site
+
+git config --global user.email "[email protected]"
+git config --global user.name "travis-ci"
+git clone --quiet --branch=gh-pages \
+    https://${GH_PAGES_TOKEN}@github.com/opengrok/opengrok gh-pages
+
+cd gh-pages
+if [[ -d ./javadoc ]]; then
+	git rm -rf ./javadoc
+fi
+cp -Rf ${TRAVIS_BUILD_DIR}/target/site/apidocs ./javadoc
+git add -f ./javadoc
+git commit -m "Lastest javadoc auto-pushed to gh-pages"
+git push -fq origin gh-pages