.travis.yml

language: ruby
env:
    # directory of Jekyll build artifacts
    - OUTPUT_DIR=_site

cache: bundler
branches:
    only:
        - master

script:
    - JEKYLL_ENV=production bundle exec jekyll build --destination $OUTPUT_DIR

# both of the following scripts are deployment scripts:
# in case of pull request, upload build artifacts to preview site;
# otherwise, upload to core site.

before_script:
    - |
      if [ "$TRAVIS_PULL_REQUEST" = "false" ]; then
        git clone --depth 1 "https://${GITHUB_TOKEN}@github.com/puyotw/puyotw.github.io.git" $OUTPUT_DIR
      else
        git clone --depth 1 "https://${GITHUB_TOKEN}@github.com/puyotw/preview-site.git"
        mkdir preview-site/$TRAVIS_PULL_REQUEST
        ln -s "$(pwd)/preview-site/$TRAVIS_PULL_REQUEST" $OUTPUT_DIR
        # change config file to generate site with preview-site specific url
        sed -i.bak \
            "s|^baseurl:.*$|baseurl: \"$TRAVIS_PULL_REQUEST\"|; s|^url:.*$|url: \"https://preview.puyo.tw\"|" \
            _config.yml
        # remove everything from the output dir in case this build request was re-triggered
        rm -fr $OUTPUT_DIR/*
      fi

after_success:
    - |
      cd $OUTPUT_DIR
      git config --global user.email "carbuncle-bot-puyotw[bot]@users.noreply.github.com"
      git config --global user.name  "carbuncle-bot-puyotw[bot]"
      git add . > /dev/null
      git commit -m "Travis build $TRAVIS_BUILD_NUMBER against commit $TRAVIS_COMMIT. (#$TRAVIS_PULL_REQUEST)" > /dev/null
      git push origin master