Add Dockerfile for multi-arch builds

Author: max-lt

.github/workflows/docker.yml

@@ -0,0 +1,51 @@
+name: Docker
+
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - "v*.*.*"
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Check Out Repo
+        uses: actions/checkout@v4
+
+      - name: Docker metadata
+        id: metadata
+        uses: docker/metadata-action@v5
+        with:
+          images: |
+            ghcr.io/${{ github.repository }}
+          tags: |
+            type=raw,value=latest,enable={{is_default_branch}}
+            type=ref,event=branch
+            type=ref,event=tag
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build CLI
+        id: docker_build
+        uses: docker/build-push-action@v5
+        with:
+          file: Dockerfile.multi
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.metadata.outputs.tags }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          platforms: linux/amd64,linux/arm64

Dockerfile.multi

@@ -0,0 +1,72 @@
+FROM debian:bookworm-slim AS common
+
+RUN apt-get update \
+    && apt-get install -y ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
+
+FROM --platform=$BUILDPLATFORM rust:1.91-bookworm AS prepare
+
+RUN apt-get update && apt-get install -y \
+    gcc-aarch64-linux-gnu \
+    gcc-x86-64-linux-gnu \
+    libc6-dev-amd64-cross \
+    libc6-dev-arm64-cross
+
+ENV CC_x86_64_unknown_linux_gnu=x86_64-linux-gnu-gcc
+ENV CC_aarch64_unknown_linux_gnu=aarch64-linux-gnu-gcc
+
+ENV CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_LINKER=x86_64-linux-gnu-gcc
+ENV CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=aarch64-linux-gnu-gcc
+
+RUN rustup target add x86_64-unknown-linux-gnu \
+                      aarch64-unknown-linux-gnu
+
+RUN cargo install cargo-chef
+
+FROM prepare AS planner
+
+WORKDIR /build
+COPY . .
+RUN cargo chef prepare --recipe-path recipe.json
+
+FROM prepare AS platform
+
+ARG TARGETPLATFORM
+
+WORKDIR /build
+
+COPY --from=planner /build/recipe.json recipe.json
+
+RUN echo "Building for $TARGETPLATFORM"
+
+# Build dependencies for target platform
+RUN --mount=type=cache,id=cargo-cli-$TARGETPLATFORM,sharing=locked,target=$CARGO_HOME/git \
+    --mount=type=cache,id=cargo-cli-$TARGETPLATFORM,sharing=locked,target=$CARGO_HOME/registry \
+    --mount=type=cache,id=cargo-cli-$TARGETPLATFORM,sharing=locked,target=/build/target \
+    case "$TARGETPLATFORM" in \
+        "linux/arm64") cargo chef cook --release --target aarch64-unknown-linux-gnu --recipe-path recipe.json ;; \
+        "linux/amd64") cargo chef cook --release --target x86_64-unknown-linux-gnu --recipe-path recipe.json ;; \
+        *) echo "Unsupported platform: $TARGETPLATFORM" && exit 1 ;; \
+    esac
+
+COPY . /build
+
+# Build CLI for target platform
+RUN --mount=type=cache,id=cargo-cli-$TARGETPLATFORM,sharing=locked,target=$CARGO_HOME/git \
+    --mount=type=cache,id=cargo-cli-$TARGETPLATFORM,sharing=locked,target=$CARGO_HOME/registry \
+    --mount=type=cache,id=cargo-cli-$TARGETPLATFORM,sharing=locked,target=/build/target \
+    case "$TARGETPLATFORM" in \
+        "linux/arm64") \
+            cargo build --release --target aarch64-unknown-linux-gnu && \
+            mv /build/target/aarch64-unknown-linux-gnu/release/ow /build/output ;; \
+        "linux/amd64") \
+            cargo build --release --target x86_64-unknown-linux-gnu && \
+            mv /build/target/x86_64-unknown-linux-gnu/release/ow /build/output ;; \
+        *) echo "Unsupported platform: $TARGETPLATFORM" && exit 1 ;; \
+    esac
+
+FROM common
+
+COPY --from=platform /build/output /usr/local/bin/ow
+
+ENTRYPOINT ["/usr/local/bin/ow"]