feat(build): add gh-pages task

.travis.yml

@@ -14,7 +14,8 @@ before_script:
 - npm prune
 script:
 - npm run build
-- npm test
+after_script:
+- bash ./scripts/deploy.sh
 env:
   global:
   - GH_USER: voorhoede

scripts/deploy.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+
+set -e # exit with nonzero exit code if anything fails
+
+if [[ $TRAVIS_BRANCH == "master" && $TRAVIS_PULL_REQUEST == "false" ]]; then
+
+echo "Starting to update gh-pages\n"
+
+#copy data we're interested in to other place
+cp -R dist $HOME/dist
+
+#go to home and setup git
+cd $HOME
+git config --global user.email "[email protected]"
+git config --global user.name "Travis"
+
+#using token clone gh-pages branch
+git clone --quiet --branch=gh-pages https://${GH_TOKEN}@github.com/${GH_USER}/${GH_REPO}.git gh-pages > /dev/null
+
+#go into directory and copy data we're interested in to that directory
+cd gh-pages
+cp -Rf $HOME/dist/* .
+
+echo "Allow files with underscore https://help.github.com/articles/files-that-start-with-an-underscore-are-missing/" > .nojekyll
+echo "[View live](https://${GH_USER}.github.io/${GH_REPO}/)" > README.md
+
+#add, commit and push files
+git add -f .
+git commit -m "Travis build $TRAVIS_BUILD_NUMBER"
+git push -fq origin gh-pages > /dev/null
+
+echo "Done updating gh-pages\n"
+
+else
+ echo "Skipped updating gh-pages, because build is not triggered from the master branch."
+fi;