From 8c3d01f201669425ca84e333a734775c0a9c0c23 Mon Sep 17 00:00:00 2001
From: Joshua Peek <josh@joshpeek.com>
Date: Fri, 1 Nov 2019 20:58:18 -0700
Subject: [PATCH] Add Docker push to GitHub Package Registry

Co-authored-by: Nathan Herald <me@nathanherald.com>
---
 ci/docker-push.yml                        | 73 +++++++++++++++++++++++
 ci/properties/docker-push.properties.json |  6 ++
 2 files changed, 79 insertions(+)
 create mode 100644 ci/docker-push.yml
 create mode 100644 ci/properties/docker-push.properties.json

diff --git a/ci/docker-push.yml b/ci/docker-push.yml
new file mode 100644
index 0000000..51a36f3
--- /dev/null
+++ b/ci/docker-push.yml
@@ -0,0 +1,73 @@
+name: Docker
+
+on:
+  push:
+    # Publish `master` as Docker `latest` image.
+    branches:
+      - master
+
+    # Publish `v1.2.3` tags as releases.
+    tags:
+      - v*
+
+  # Run tests for any PRs.
+  pull_request:
+
+env:
+  # TODO: Change variable to your image's name.
+  IMAGE_NAME: image
+
+jobs:
+  # Run tests.
+  # See also https://docs.docker.com/docker-hub/builds/automated-testing/
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v1
+
+      - name: Run tests
+        run: |
+          if [ -f docker-compose.test.yml ]; then
+            docker-compose --file docker-compose.test.yml build
+            docker-compose --file docker-compose.test.yml run sut
+          else
+            docker build . --file Dockerfile
+          fi
+
+  # Push image to GitHub Package Registry.
+  # See also https://docs.docker.com/docker-hub/builds/
+  push:
+    # Ensure test job passes before pushing image.
+    needs: test
+
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push'
+
+    steps:
+      - uses: actions/checkout@v1
+
+      - name: Build image
+        run: docker build . --file Dockerfile --tag image
+
+      - name: Log into registry
+        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login docker.pkg.github.com -u ${{ github.actor }} --password-stdin
+
+      - name: Push image
+        run: |
+          IMAGE_ID=docker.pkg.github.com/${{ github.repository }}/$IMAGE_NAME
+
+          # Strip git ref prefix from version
+          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
+
+          # Strip "v" prefix from tag name
+          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
+
+          # Use Docker `latest` tag convention
+          [ "$VERSION" == "master" ] && VERSION=latest
+
+          echo IMAGE_ID=$IMAGE_ID
+          echo VERSION=$VERSION
+
+          docker tag image $IMAGE_ID:$VERSION
+          docker push $IMAGE_ID:$VERSION
diff --git a/ci/properties/docker-push.properties.json b/ci/properties/docker-push.properties.json
new file mode 100644
index 0000000..d23e119
--- /dev/null
+++ b/ci/properties/docker-push.properties.json
@@ -0,0 +1,6 @@
+{
+  "name": "Docker push",
+  "description": "Build, test and push Docker image to GitHub Package Registry.",
+  "iconName": "docker",
+  "categories": ["Dockerfile"]
+}