Conditional Deploy in Travis CI

.travis.yml

env:
  global:
    - CC_TEST_REPORTER_ID=b80cc9abeed21ed522cf2d3831da7ed52dfd6e18bdce2ade4125fd033e96a951
language: ruby

cache:
  bundler: true
  directories:
    - $HOME/docker_images

rvm:
  - 2.6.5

before_install:
  - gem install bundler

services:
  - docker
  - postgresql
before_script:
  - psql -c 'create database travis_ci_test;' -U postgres
  - cp config/database.yml config/database.yml.bak
  - cp config/database.yml.travis config/database.yml
  - curl -L https://codeclimate.com/downloads/test-reporter/test-reporter-latest-linux-amd64 > ./cc-test-reporter
  - chmod +x ./cc-test-reporter
  - ./cc-test-reporter before-build
script:
  - bundle exec rspec
after_script:
  - ./cc-test-reporter after-build --exit-code $TRAVIS_TEST_RESULT

before_deploy:
  - cp config/database.yml.bak config/database.yml
  - openssl aes-256-cbc -K $encrypted_6d1250a3dbca_key -iv $encrypted_6d1250a3dbca_iv
    -in deploy/machines/babywearing-stage/certs.tar.enc -out deploy/machines/babywearing-stage/certs.tar
    -d
  - mkdir deploy/machines/babywearing-stage/certs
  - tar xvf deploy/machines/babywearing-stage/certs.tar -C deploy/machines/babywearing-stage/certs

deploy:
  skip_cleanup: true
  provider: script
  script: ./deploy/deploy.sh
  on: 
     tags: false
     all_branches: true 
     condition: $TRAVIS_BRANCH =~ ^(staging|master)$