nix docker image

.dockerignore

@@ -1,4 +0,0 @@
-/target
-**/*.rs.bk
-result
-.direnv

.github/workflows/ci.yaml

@@ -7,10 +7,28 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: cachix/install-nix-action@v20
+      - uses: cachix/install-nix-action@v25
       - uses: icewind1991/attic-action@v1
         with:
           name: ci
           instance: https://cache.icewind.me
           authToken: '${{ secrets.ATTIC_TOKEN }}'
-      - run: nix build
+      - run: nix build
+
+  docker:
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+      - uses: cachix/install-nix-action@v25
+      - uses: icewind1991/attic-action@v1
+        with:
+          name: ci
+          instance: https://cache.icewind.me
+          authToken: '${{ secrets.ATTIC_TOKEN }}'
+      - run: nix build .#docker
+      - name: Push image
+        if: github.ref == 'refs/heads/master'
+        run: |
+          skopeo copy --dest-creds="${{ secrets.DOCKERHUB_USERNAME }}:${{ secrets.DOCKERHUB_TOKEN }}" "docker-archive:$(nix build .#docker --print-out-paths)" "docker://icewind1991/prometheus-mdns-sd"

Dockerfile

@@ -1,21 +0,0 @@
-FROM ekidd/rust-musl-builder AS build
-
-COPY Cargo.toml Cargo.lock ./
-
-# Build with a dummy main to pre-build dependencies
-RUN mkdir src && \
- sudo chown -R rust:rust . && \
- echo "fn main(){}" > src/main.rs && \
- cargo build --release && \
- rm -r src
-
-COPY src/ ./src/
-RUN sudo chown -R rust:rust . && touch src/main.rs
-
-RUN cargo build --release
-
-FROM scratch
-
-COPY --from=build /home/rust/src/target/x86_64-unknown-linux-musl/release/prometheus-mdns-sd-rs /
-
-CMD ["/prometheus-mdns-sd-rs"]

docker.nix

@@ -0,0 +1,16 @@
+{
+  dockerTools,
+  prometheus-mdns-sd,
+}:
+dockerTools.buildLayeredImage {
+  name = "icewind1991/prometheus-mdns-sd";
+  tag = "latest";
+  maxLayers = 5;
+  contents = [
+    prometheus-mdns-sd
+    dockerTools.caCertificates
+  ];
+  config = {
+    Cmd = ["prometheus-mdns-sd-rs"];
+  };
+}

flake.nix

@@ -20,6 +20,7 @@
       in rec {
         packages = rec {
           prometheus-mdns-sd = pkgs.prometheus-mdns-sd;
+          docker = pkgs.callPackage ./docker.nix {};
           default = prometheus-mdns-sd;
         };