ci: build and push Docker images on `main` branch (#6659)

.github/workflows/docker.yml

@@ -0,0 +1,63 @@
+name: Docker
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    paths:
+      - 'Dockerfile'
+      - 'docker/**'
+      - '.github/workflows/docker.yml'
+
+jobs:
+  buildx:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Set up QEMU
+        id: qemu
+        uses: docker/setup-qemu-action@v1
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v1
+        with:
+          config-inline: |
+            [worker.oci]
+              max-parallelism = 2
+      - name: Inspect builder
+        run: |
+          echo "Name:      ${{ steps.buildx.outputs.name }}"
+          echo "Endpoint:  ${{ steps.buildx.outputs.endpoint }}"
+          echo "Status:    ${{ steps.buildx.outputs.status }}"
+          echo "Flags:     ${{ steps.buildx.outputs.flags }}"
+          echo "Platforms: ${{ steps.buildx.outputs.platforms }}"
+      - name: Build images on pull requests
+        if: ${{ github.event_name == 'pull_request' }}
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64,linux/arm/v7
+      - name: Login to Docker Hub
+        if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Login to GitHub Container registry
+        if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build and push images on commits to main
+        if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64,linux/arm/v7
+          push: true
+          tags: |
+            gogs/gogs:latest
+            ghcr.io/gogs/gogs:latest

.github/workflows/go.yml

@@ -23,7 +23,8 @@ jobs:
     name: Lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - name: Checkout code
+        uses: actions/checkout@v2
       - name: Run golangci-lint
         uses: golangci/golangci-lint-action@v2
         with:

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:alpine3.11 AS binarybuilder
+FROM golang:alpine3.12 AS binarybuilder
 RUN apk --no-cache --no-progress add --virtual \
   build-deps \
   build-base \
@@ -9,7 +9,7 @@ WORKDIR /gogs.io/gogs
 COPY . .
 RUN make build TAGS="cert pam"
 
-FROM alpine:3.11
+FROM alpine:3.12
 RUN if [ `uname -m` == "aarch64" ] ; then \
       export arch="arm64" ; \
   elif [ `uname -m` == "armv7l" ] ; then \