sample of ,travis.yml

.travis.yml

# Refrecnes:
# http://www.think-diff.me/2016/05/28/travis-ci-deploy-blog/
# https://zespia.tw/blog/2015/01/21/continuous-deployment-to-github-with-travis/
# https://docs.travis-ci.com/user/languages/javascript-with-nodejs
# https://github.com/iissnan/theme-next-docs/blob/master/.travis.yml
# http://changyuheng.me/2015/when-hexo-static-site-meets-github-pages-and-travis-ci/

language: node_js
node_js: stable

cache:
  directories:
    - node_modules

install:
  - npm install

before_script:
  - npm install -g gulp

script:
  - gulp build

after_script:
  - cd public
  - git init
  - git config user.name "karl"
  - git config user.email "i@think-diff.me"
  - git add .
  - git commit -m "Update docs"
  - git push --force --quiet "https://${GH_TOKEN}@${GIT_PAGE_REF}" master:master
  # if it isn't a user/org page, please replace it with <master:gh-pages>
  

branches:
  only:
    - master
env:
 global:
   - GIT_PAGE_REF: github.com/zhoujiealex/zhoujiealex.github.io.git
   - secure: "<replace it with encrypted key by travis ci client tool>"
   
# configure notifications (email, IRC, campfire etc)
# please update this section to your needs!
# https://docs.travis-ci.com/user/notifications/
notifications:
  email:
    - i@think-diff.me
    - zhoujiealex@gmail.com
  on_success: change
  on_failure: always