.travis.yml

dist: trusty
sudo: true

language: generic

# All PRs already get a build.
# This restricts only master to get a build for pushes.
branches:
  only:
    - master

services:
  - docker

# publish to opendoor gothumb on non-master branch
stages:
  - name: publish to opendoor-gothumb
    if: (branch = master) AND (type = pull_request)
  - name: publish to gothumb
    if: (branch = master) AND (type != pull_request)

install: true

before_install:
  - docker --version
  - docker login -u "$DOCKERHUB_USER" -p "$DOCKERHUB_PASS"

jobs:
  include:
    - stage: publish to opendoor-gothumb
      install:
        - docker pull opendoor/gothumb:master-latest
        - docker build -t gothumb-local --file=Dockerfile . --cache-from opendoor/gothumb:master-latest
        - docker history gothumb-local
      script:
        - IMAGE_REPO_NAME="opendoor-gothumb" # e.g. opendoor-labs/myrepo => opendoor-myrepo
        - echo "$IMAGE_REPO_NAME"
        - echo "$TRAVIS_COMMIT" > GIT_DEPLOY_SHA
        - docker build -t "opendoor/opendoor-gothumb:${TRAVIS_COMMIT:0:7}" --file=Dockerfile . --cache-from opendoor-gothumb-local
        - docker push "opendoor/opendoor-gothumb:${TRAVIS_COMMIT:0:7}"
          # By default Travis builds the merge commit of the HEAD of the PR with the base branch.
          # This is a bit confusing as the commit sha which is built is not present in the repo itself;
          # it's the transient merge commit with base. This behavior is good for unit tests, but
          # strange for building images.
          # ref: https://docs.travis-ci.com/user/pull-requests#How-Pull-Requests-are-Tested
        - if [ -n "$TRAVIS_PULL_REQUEST_SHA" ]; then
            git checkout "$TRAVIS_PULL_REQUEST_SHA";
            echo "$TRAVIS_PULL_REQUEST_SHA" > GIT_DEPLOY_SHA;
            docker build -t "opendoor/opendoor-gothumb:${TRAVIS_PULL_REQUEST_SHA:0:7}" --file=Dockerfile . --cache-from gothumb-local;
            docker push "opendoor/opendoor-gothumb:${TRAVIS_PULL_REQUEST_SHA:0:7}";
          fi
    - stage: publish to gothumb
      install:
        - docker pull opendoor/gothumb:master-latest
        - docker build -t gothumb-local --file=Dockerfile . --cache-from opendoor/gothumb:master-latest
        - docker history gothumb-local
      script:
        - docker build -t "opendoor/gothumb:${TRAVIS_COMMIT:0:7}" --file=Dockerfile . --cache-from gothumb-local
        - docker push "opendoor/gothumb:${TRAVIS_COMMIT:0:7}"
        - if [ "$TRAVIS_PULL_REQUEST" == "false" ] && [ "$TRAVIS_BRANCH" == "master" ]; then
            docker build -t "opendoor/gothumb:${TRAVIS_COMMIT:0:7}" --file=Dockerfile . --cache-from gothumb-local;
            docker push "opendoor/gothumb:${TRAVIS_COMMIT:0:7}";
            docker build -t "opendoor/gothumb:master-latest" --file=Dockerfile . --cache-from gothumb-local;
            docker push "opendoor/gothumb:master-latest";
          fi