Create a Docker image on each commit and push to Quay

.dockerignore

@@ -0,0 +1,3 @@
+/.bundle
+/.env
+/.git

.travis.yml

@@ -18,9 +18,6 @@ env:
   - RAILS_ENV=test
   - RAILS_ENV=test_logs
 
-matrix:
-  fast_finish: true
-
 before_install:
   - gem install bundler -v 1.12.4
 
@@ -29,3 +26,13 @@ install:
 
 before_script:
   - cp config/database.yml.travis config/database.yml
+
+jobs:
+  fast_finish: true
+  include:
+    - stage: ":ship: it to Quay.io"
+      sudo: required
+      dist: trusty
+      install: skip
+      before_script: skip
+      script: ./script/docker-build-and-push

Dockerfile

@@ -0,0 +1,18 @@
+FROM ruby:2.3.1
+
+LABEL maintainer Travis CI GmbH <[email protected]>
+
+# throw errors if Gemfile has been modified since Gemfile.lock
+RUN bundle config --global frozen 1
+
+RUN mkdir -p /usr/src/app
+WORKDIR /usr/src/app
+
+COPY Gemfile      /usr/src/app
+COPY Gemfile.lock /usr/src/app
+
+RUN bundle install
+
+COPY . /usr/src/app
+
+CMD RAILS_ENV=${RAILS_ENV-development} bundle exec rake db:migrate

docker-compose.yml

@@ -0,0 +1,4 @@
+version: "2"
+services:
+  migrations:
+    build: .

script/docker-build-and-push

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+set -ev
+app_name="migrations"
+local_image="travismigrations_$app_name" # Docker Compose removes dashes and expects the name to end with the build app name
+quay_image=quay.io/travisci/travis-migrations;
+
+docker-compose build "$app_name";
+docker login -u="$QUAY_ROBOT_HANDLE" -p="$QUAY_ROBOT_TOKEN" quay.io;
+docker images;
+
+docker tag $local_image $quay_image:$TRAVIS_BRANCH;
+docker push $quay_image:$TRAVIS_BRANCH;
+
+docker tag $local_image $quay_image:${TRAVIS_COMMIT:0:7};
+docker push $quay_image:${TRAVIS_COMMIT:0:7};
+
+if [ ${TRAVIS_BRANCH} = "master" ]; then
+  docker tag $local_image $quay_image:latest;
+  docker push $quay_image:$TRAVIS_BRANCH;
+fi
+
+exit 0;