.travis.yml

language: go

go:
  - 1.7.4

# sudo and docker are necessary for building and pushing deployable docker images
sudo: required
dist: trusty
services:
  - docker

cache:
  directories:
    - $HOME/docker

before_install:
  - apt-cache madison docker-engine
  - sudo apt-get install -qq docker-engine=1.12.3-0~trusty
  - sudo service docker stop &
  - sudo killall -9 dockerd; sudo killall -9 docker-containerd; true
  - sudo mount -t tmpfs -o size=4g tmpfs /var/lib/docker
  - wait # for docker to finish stopping
  - sudo service docker start
  - ci/wait_for_docker.sh
  - export PATH=${PATH}:${TRAVIS_BUILD_DIR}/vendor/bin
  - export GOPATH="${TRAVIS_BUILD_DIR}/vendor:${TRAVIS_BUILD_DIR}/private"
  - mkdir -p ~/docker
  - export NUM_SHARDS=3

install:
  - go install github.com/jharlap/affected

env:
  - SHARD=0
  - SHARD=1
  - SHARD=2

script:
  - docker version
  - echo "TRAVIS_PULL_REQUEST $TRAVIS_PULL_REQUEST TRAVIS_PULL_REQUEST_BRANCH $TRAVIS_PULL_REQUEST_BRANCH TRAVIS_COMMIT_RANGE $TRAVIS_COMMIT_RANGE"
  - if [[ "$TRAVIS_PULL_REQUEST" != "false" && "$TRAVIS_PULL_REQUEST_SHA" != "" ]] ; then
      base_version=$(git merge-base master ${TRAVIS_PULL_REQUEST_SHA}) ;
      export AFFECTED_COMMIT_RANGE="${base_version}..${TRAVIS_PULL_REQUEST_SHA}" ;
    elif [[ "$TRAVIS_COMMIT_RANGE" != "" ]] ; then
      export AFFECTED_COMMIT_RANGE="master" ;
    fi
  - ci/make_shard.sh ${SHARD} ${NUM_SHARDS} "${AFFECTED_COMMIT_RANGE}" test
  # in script rather than after_success so that failures building/pushing images will show as red
  - if [[ "$TRAVIS_PULL_REQUEST" == "false" && "$TRAVIS_BRANCH" == "master" ]] ; then
      echo skipping the next line because the docker repo is fake, but remove the echo in the next line for wins
      echo ci/make_shard.sh ${SHARD} ${NUM_SHARDS} "${AFFECTED_COMMIT_RANGE}" push_image ;
    fi

branches:
  only:
    - master