Use self-hosted runner for ARM builds (#477)

.github/workflows/publish.yml

@@ -6,8 +6,92 @@ on:
     - 'v*'
 
 jobs:
-  release:
+  publish:
+    strategy:
+      matrix:
+        runner-platform:
+          - ubuntu-latest
+          - self-hosted
+        include:
+          - runner-platform: ubuntu-latest
+            build-arch: linux/amd64
+            tagged-platform: amd64
+          - runner-platform: self-hosted
+            build-arch: linux/arm64
+            tagged-platform: arm64
+    runs-on: ${{ matrix.runner-platform }}
+    steps:
+      - name: Set up Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Cache Docker layers
+        uses: actions/cache@v2
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-buildx-prs-${{ matrix.build-arch }}-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-prs-${{ matrix.build-arch }}
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push
+        id: docker_build
+        uses: docker/build-push-action@v2
+        with:
+          push: true
+          tags: codetheweb/muse:${{ github.event.pull_request.head.sha }}-${{ matrix.tagged-platform }}
+          platforms: ${{ matrix.build-arch }}
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,dest=/tmp/.buildx-cache,mode=max
+
+  combine:
+    name: Combine platform tags
     runs-on: ubuntu-latest
+    needs: publish
+    steps:
+      - uses: actions/checkout@v1
+
+      - name: Set up Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Get tags
+        id: get-tags
+        uses: Surgo/docker-smart-tag-action@v1
+        with:
+          docker_image: codetheweb/muse
+
+      - name: Wait on lint & build
+        uses: lewagon/wait-on-check-action@v1.1.1
+        with:
+          ref: ${{ github.sha }}
+          check-name: 'Lint & build'
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          wait-interval: 10
+
+      - name: Combine tags
+        run: docker buildx imagetools create $(echo '${{ steps.get-tags.outputs.tag }}' | tr "," "\0" | xargs -0 printf -- '-t %s ') 'codetheweb/muse:${{ github.event.pull_request.head.sha }}-arm64' 'codetheweb/muse:${{ github.event.pull_request.head.sha }}-amd64'
+
+      - name: Update Docker Hub description
+        uses: peter-evans/dockerhub-description@v2.4.3
+        env:
+          DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
+          DOCKERHUB_PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}
+          DOCKERHUB_REPOSITORY: codetheweb/muse
+
+  release:
+    name: Create GitHub release
+    runs-on: ubuntu-latest
+    needs: combine
     steps:
       - uses: actions/checkout@v2
 
@@ -34,59 +118,3 @@ jobs:
           draft: ${{ steps.changelog_reader.outputs.status == 'unreleased' }}
           allowUpdates: true
           token: ${{ secrets.GITHUB_TOKEN }}
-
-  publish:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v1
-
-      - name: Set up Buildx
-        uses: docker/setup-buildx-action@v1
-
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v1
-
-      - name: Cache Docker layers
-        uses: actions/cache@v2
-        with:
-          path: /tmp/.buildx-cache
-          key: ${{ runner.os }}-buildx-${{ github.sha }}
-          restore-keys: |
-            ${{ runner.os }}-buildx-
-
-      - name: Login to DockerHub
-        uses: docker/login-action@v1
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-
-      - name: Get tags
-        id: get-tags
-        uses: Surgo/docker-smart-tag-action@v1
-        with:
-          docker_image: codetheweb/muse
-
-      - name: Wait on lint & build
-        uses: lewagon/wait-on-check-action@v1.1.1
-        with:
-          ref: ${{ github.sha }}
-          check-name: 'Lint & build'
-          repo-token: ${{ secrets.GITHUB_TOKEN }}
-          wait-interval: 10
-
-      - name: Build and push
-        id: docker_build
-        uses: docker/build-push-action@v2
-        with:
-          push: true
-          tags: ${{ steps.get-tags.outputs.tag }}
-          platforms: linux/amd64,linux/arm64
-          cache-from: type=local,src=/tmp/.buildx-cache
-          cache-to: type=local,dest=/tmp/.buildx-cache,mode=max
-
-      - name: Update Docker Hub description
-        uses: peter-evans/dockerhub-description@v2.4.3
-        env:
-          DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
-          DOCKERHUB_PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}
-          DOCKERHUB_REPOSITORY: codetheweb/muse