language: node_js
node_js:
- "4"
- "stable"
sudo: false
cache:
  directories:
  - node_modules
after_script:
- |
  # RELEASE_BRANCHES and NPM_TOKEN defined in Travis settings panel
  declare exitCode
  $(npm bin)/travis-after-all
  exitCode=$?
  if [[
    $exitCode = 0 &&
    $RELEASE_BRANCHES =~ $TRAVIS_BRANCH &&
    $TRAVIS_PULL_REQUEST = "false"
  ]]; then
    echo "//registry.npmjs.org/:_authToken=\${NPM_TOKEN}" > .npmrc
    npm --no-git-tag-version version $(node -p -e "require('./package.json').version")-${TRAVIS_COMMIT:0:5}
    npm publish
    git config --global user.email $(git log --pretty=format:"%ce" -n1)
    git config --global user.name $(git log --pretty=format:"%cn" -n1)
    ./node_modules/.bin/gh-pages -x -r https://${GH_TOKEN}@github.com/${TRAVIS_REPO_SLUG}.git -d playground -m "Build for $(git log --pretty=format:%H)"
  fi