build the docker images in the CI

.github/workflows/docker.yml

@@ -0,0 +1,61 @@
+name: docker
+
+# Only do the release on x.y.z tags.
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - "[0-9]+.[0-9]+.[0-9]+"
+
+jobs:
+  docker:
+    name: docker
+    runs-on: ubuntu-latest
+    env:
+      CROSS_VERSION: v0.2.5
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: stable
+
+      - name: Set up QEMU
+        id: qemu
+        uses: docker/setup-qemu-action@v1
+        with:
+          image: tonistiigi/binfmt:latest
+          platforms: all
+
+      - name: Use Cross
+        shell: bash
+        run: |
+          # In the past, new releases of 'cross' have broken CI. So for now, we
+          # pin it. We also use their pre-compiled binary releases because cross
+          # has over 100 dependencies and takes a bit to compile.
+          dir="$RUNNER_TEMP/cross-download"
+          mkdir "$dir"
+          echo "$dir" >> $GITHUB_PATH
+          cd "$dir"
+          curl -LO "https://github.com/cross-rs/cross/releases/download/$CROSS_VERSION/cross-x86_64-unknown-linux-musl.tar.gz"
+          tar xf cross-x86_64-unknown-linux-musl.tar.gz
+          echo "CARGO=cross" >> $GITHUB_ENV
+
+      - name: Install earthly
+        uses: earthly/actions-setup@v1.0.4
+        with:
+          version: 0.8.3
+          use-cache: "false"
+
+      - name: Login to ghcr.io
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push the images
+        run: earthly --push --no-output +docker-multiplatform --build=cross --tag=${{ github.ref_name }}

Earthfile

@@ -24,7 +24,9 @@ cross:
     LOCALLY
     ARG --required platform_slug
     ARG --required target
-    RUN cross build --target $target --release  \
+    RUN rm -rf target/release \
+        && cross build --target $target --release  \
+        && mkdir -p bin \
         && cp target/$target/release/yage bin/yage-$platform_slug
 
 cross-dind:
@@ -78,8 +80,9 @@ docker:
     ARG build=earthly
     COPY (+artifact/yage --build=$build) /yage
     ENTRYPOINT ["/yage"]
-    ARG tag=latest
-    SAVE IMAGE --push glehmann/yage:$tag
+    ARG tag=main
+    # SAVE IMAGE --push glehmann/yage:$tag
+    SAVE IMAGE --push ghcr.io/glehmann/yage:$tag
 
 docker-multiplatform:
     ARG build=earthly
@@ -90,5 +93,5 @@ docker-multiplatform:
         --platform=linux/arm/v7 \
         --platform=linux/arm/v6 \
         --platform=linux/ppc64le \
-        --platform=linux/s390x \
+        # --platform=linux/s390x \
         +docker --build=$build