From 67114c32345b17781990009cf8faec9db3c7c935 Mon Sep 17 00:00:00 2001
From: Robbie Blaine <robbieblaine.rb@gmail.com>
Date: Tue, 7 Nov 2023 12:00:58 +0200
Subject: [PATCH] Docker Build

---
 .github/workflows/ci.yml | 55 ++++++++++++++++++++++++++++++++++++++++
 Dockerfile               |  6 +++++
 README.md                |  5 ++--
 3 files changed, 64 insertions(+), 2 deletions(-)
 create mode 100644 Dockerfile

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1e306d2..3808696 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,6 +15,9 @@ concurrency:
   group: cicd-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  REGISTRY: ghcr.io/${{ github.repository_owner }}
+
 jobs:
   test:
     name: Test
@@ -31,3 +34,55 @@ jobs:
           jvm: 21
       - run: scala-cli fmt --check .
       - run: scala-cli --power test .
+
+  build:
+    name: Build and push Docker
+    permissions:
+      packages: write
+    runs-on: ubuntu-latest
+
+    needs: test
+
+    concurrency:
+      group: cicd-build-${{ github.ref }}
+      cancel-in-progress: true
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: docker/setup-buildx-action@v3
+      - uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ github.token }}
+
+      - uses: VirtusLab/scala-cli-setup@v1
+        with:
+          jvm: 21
+      - run: mkdir ./target
+      - run: scala-cli --power package --standalone . -o ./target/dawn-patrol
+
+      - uses: docker/metadata-action@v5
+        id: meta
+        with:
+          images: ${{ env.REGISTRY }}/dawn-patrol
+          tags: |
+            type=sha,prefix=pr-${{ github.event.pull_request.number }}-,priority=601,enable=${{ github.event_name == 'pull_request' }}
+            type=sha,prefix={{branch}}-,priority=601,enable=${{ github.event_name == 'push' && github.ref_type == 'branch' }}
+            type=ref,event=branch,priority=600
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+
+      - uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: Dockerfile
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: |
+            type=gha,scope=build
+            type=registry,ref=${{ env.REGISTRY }}/dawn-patrol:latest
+          cache-to: type=gha,mode=max,scope=build
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..7f1ac9b
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,6 @@
+FROM eclipse-temurin:21
+
+WORKDIR /app
+COPY ./target/dawn-patrol ./dawn-patrol
+
+ENTRYPOINT [ "/app/dawn-patrol" ]
diff --git a/README.md b/README.md
index 1eb336c..0484376 100644
--- a/README.md
+++ b/README.md
@@ -42,8 +42,9 @@ Once running, the application will poll the Signal API, obtaining messages for t
 
 The messaging logic is defined in [DawnPatrol](src/xyz/didx/DawnPatrol.scala) and [ConversationPollingHandler](src/xyz/didx/ConversationPollingHandler.scala)
 
-To create a docker container for DawnPatrol use:
+### Docker
+The easiest way to build a docker container for DawnPatrol is to use the `scala-cli`:
 
 ```bash
-scala-cli --power package --native --docker . --docker-from ghcr.io/graalvm/jdk-community:21 --docker-image-repository dawn-patrol
+scala-cli --power package --docker . --docker-from eclipse-temurin:21 --docker-image-repository dawn-patrol
 ```