build docker image

Author: mattn

.github/workflows/docker.yaml

@@ -0,0 +1,50 @@
+name: Publish Docker image
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  push_to_registry:
+    name: Docker
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out the repo
+      uses: actions/checkout@v3
+      with:
+        submodules: true
+
+    - name: Set up QEMU
+      uses: docker/setup-qemu-action@v1
+
+    - name: Set up Docker Buildx
+      id: buildx
+      uses: docker/setup-buildx-action@v1
+
+    - name: Log in to GitHub Container Registry
+      uses: docker/login-action@v2
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Extract metadata (tags, labels) for Docker
+      id: meta
+      uses: docker/metadata-action@v3
+      with:
+        images: ghcr.io/${{ github.repository }}
+
+    - name: Build and push Docker image
+      uses: docker/build-push-action@v2
+      with:
+        context: .
+        platforms: linux/amd64
+        builder: ${{ steps.buildx.outputs.name }}
+        push: ${{ github.event_name != 'pull_request' }}
+        tags: |
+          ghcr.io/${{ github.repository }}:latest
+          ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
+        cache-from: type=gha
+        cache-to: type=gha,mode=max # mode=maxを有効にすると、中間ステージまで含めてキャッシュできる

Dockerfile

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+FROM debian:buster-slim AS build-dev
+
+WORKDIR /app/src
+COPY --link . .
+
+RUN apt-get update && \
+    apt-get install -y gcc g++ cmake
+
+ENV CC=/usr/bin/gcc \
+    CXX=/usr/bin/g++
+
+RUN mkdir build && cd build && cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_CXX_FLAGS="-Werror" .. && make example-file
+
+FROM debian:buster-slim AS stage
+
+COPY --from=build-dev /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY --from=build-dev /app/src/build/example/file/example-file /app/file
+ENTRYPOINT ["/app/file"]