feat(ci): better rust CI

.dockerignore

@@ -15,6 +15,9 @@
 !PluralKit.sln
 !nuget.config
 
+# used for target binary builds
+!.docker-bin/
+
 # Re-exclude host build artifact directories
 **/bin
 **/obj

.github/workflows/rust.yml

@@ -21,21 +21,36 @@ jobs:
     if: github.repository == 'PluralKit/PluralKit'
     steps:
       - uses: docker/login-action@v1
+        if: ${{ !env.ACT }}
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.CR_PAT }}
+
       - uses: actions/checkout@v2
+      - uses: docker/setup-buildx-action@v1
+
+      # main docker build
       - run: echo "BRANCH_NAME=${GITHUB_REF#refs/heads/}" >> $GITHUB_ENV
       - uses: docker/build-push-action@v2
         with:
           # https://github.com/docker/build-push-action/issues/378
           context: .
           file: Dockerfile.rust
-          push: true
-          tags: |
-            ghcr.io/pluralkit/api:${{ env.BRANCH_NAME }}
-            ghcr.io/pluralkit/api:${{ github.sha }}
-            ghcr.io/pluralkit/api:latest
-          cache-from: type=registry,ref=ghcr.io/pluralkit/pluralkit:${{ env.BRANCH_NAME }}
-          cache-to: type=inline
+          push: false 
+          cache-from: type=gha
+          cache-to: type=gha
+          outputs: .docker-bin
+
+      # add more binaries here
+      - run: |
+          for binary in "api"; do
+            for tag in latest ${{ env.BRANCH_NAME }} ${{ github.sha }}; do
+              cat Dockerfile.bin | sed "s/__BINARY__/$binary/g" | docker build -t ghcr.io/pluralkit/$binary/$tag -f - .
+            done
+            if [ "${{ github.repository }}" == "PluralKit/PluralKit" ]; then
+              docker push ghcr.io/pluralkit/$binary:${{ env.BRANCH_NAME }}
+              docker push ghcr.io/pluralkit/$binary:${{ github.sha }}
+              [ "${{ env.BRANCH_NAME }}" == "main" ] && docker push ghcr.io/pluralkit/$binary:latest
+            fi
+          done

.gitignore

@@ -27,3 +27,4 @@ pluralkit.*.conf
 logs/
 .version
 recipe.json
+.docker-bin/

Dockerfile.bin

@@ -0,0 +1,5 @@
+FROM alpine:latest
+
+COPY /.docker-bin/__BINARY__ /bin/__BINARY__
+
+CMD ["/bin/__BINARY__"]