Publish docker images via GHA (#1134)

Co-authored-by: reivilibre <[email protected]>

.github/workflows/docker.yml

@@ -0,0 +1,92 @@
+# GitHub actions workflow which builds and publishes the docker images.
+
+name: Build and deploy docker images
+
+on:
+  push:
+    branches: [ develop ]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  build-sytest-images:
+    name: "Build sytest:${{ matrix.tag }}"
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        include:
+          - base_image: ubuntu:bionic
+            tag: bionic
+          - base_image: debian:buster
+            tag: buster
+          - base_image: debian:testing
+            tag: testing
+    steps:
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Inspect builder
+        run: docker buildx inspect
+
+      - name: Log in to DockerHub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v2
+        with:
+          pull: true
+          push: true
+          labels: "gitsha1=${{ github.sha }}"
+          file: docker/base.Dockerfile
+          build-args: "BASE_IMAGE=${{ matrix.base_image }}"
+          tags: matrixdotorg/sytest:${{ matrix.tag }}
+
+  build-dependent-images:
+    needs: build-sytest-images
+    name: "Build sytest-${{ matrix.dockerfile }}:${{ matrix.sytest_image_tag }}"
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        include:
+          - sytest_image_tag: bionic
+            dockerfile: synapse
+            tags: "matrixdotorg/sytest-synapse:bionic"
+          - sytest_image_tag: buster
+            dockerfile: synapse
+            tags: "matrixdotorg/sytest-synapse:buster"
+          - sytest_image_tag: testing
+            dockerfile: synapse
+            tags: "matrixdotorg/sytest-synapse:testing"
+          - sytest_image_tag: buster
+            dockerfile: dendrite
+            tags: "matrixdotorg/sytest-dendrite:go113,matrixdotorg/sytest-dendrite:latest"
+
+    steps:
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Inspect builder
+        run: docker buildx inspect
+
+      - name: Log in to DockerHub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v2
+        with:
+          pull: true
+          push: true
+          labels: "gitsha1=${{ github.sha }}"
+          file: docker/base.Dockerfile
+          build-args: "SYTEST_IMAGE_TAG=${{ matrix.base_image }}"
+          tags: ${{ matrix.tags }}

docker/README.md

@@ -107,8 +107,8 @@ docker run --rm -it ... matrixdotorg/sytest-synapse:buster tests/20profile-event
 
 ## Building the containers
 
-The containers are built by executing `./build.sh`. You will then have to push
-them up to Docker Hub with `./push.sh`.
+These are automatically built and deployed on the `develop` branch by GitHub Actions.
+See `.github/workflows.docker.yml` for the gory details.
 
 ## Loading sytest plugins at start