Elixir製のプロジェクトをTravisCIで運用するための.travis.yml ref: http://qiita.com/niku/items/9c205a9d84d4dd24ddfe

.travis.yml

language: elixir
sudo: false
otp_release:
  - 19.3
elixir:
  - 1.4.2
env:
  global:
    - HEX_USERNAME=niku
    # Follow other language's environment
    # e.g.) `RACK_ENV=test` has been setted as Default Environment Variables
    # https://docs.travis-ci.com/user/environment-variables/#Default-Environment-Variables
    - MIX_ENV=test
cache:
  directories:
    - _build
    - deps
script:
  - mix credo --strict
  # https://github.com/jeremyjh/dialyxir#command-line-options
  # > exit immediately with same exit status as dialyzer. useful for CI
  - mix dialyzer --halt-exit-status
  - mix test
deploy:
   # https://docs.travis-ci.com/user/deployment/script/
   # must be a scalar pointing to an executable file or command.
   provider: script
   script: >-
     mix deps.get &&
     mix hex.config username "$HEX_USERNAME" &&
     (mix hex.config encrypted_key "$HEX_ENCRYPTED_KEY" > /dev/null 2>&1) &&
     (echo "$HEX_PASSPHRASE"\\nY | mix hex.publish) &&
     mix clean &&
     mix deps.clean --all
   on:
    tags: true