use caching in Penny deploys as well

.github/workflows/deploy-penny.yml

@@ -15,6 +15,33 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Restore .build
+        if: ${{ !(github.run_attempt > 1) }} # Because maybe the cache is causing issues
+        id: "restore-cache"
+        uses: actions/cache/restore@v4
+        with:
+          path: .build
+          key: "penny-release-static-build-${{ runner.os }}-${{ github.event.after }}"
+          restore-keys: "penny-release-static-build-${{ runner.os }}-"
+
+      - name: Build Penny
+        run: |
+          apt-get update -y
+          apt-get install -y libjemalloc-dev
+          swift build \
+            --product Penny \
+            -c release \
+            --force-resolved-versions \
+            --static-swift-stdlib \
+            -Xlinker -ljemalloc
+
+      - name: Cache .build
+        if: steps.restore-cache.outputs.cache-hit != 'true'
+        uses: actions/cache/save@v4
+        with:
+          path: .build
+          key: "penny-release-static-build-${{ runner.os }}-${{ github.event.after }}"
+
       - name: Configure AWS credentials
         uses: aws-actions/configure-aws-credentials@v4
         with:
@@ -36,7 +63,9 @@ jobs:
           # Build a docker container and
           # push it to ECR so that it can
           # be deployed to ECS.
-          docker build -t $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG -f Dockerfile .
+          docker build -t $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG -f Dockerfile . \
+            --build-arg SWIFT_CONFIGURATION=release \
+            --build-arg EXEC_NAME=Penny
           docker push $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG
           echo "image=$ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG" >> $GITHUB_OUTPUT
 

Dockerfile

@@ -3,39 +3,19 @@
 # ================================
 FROM swift:6.0-jammy as build
 
+ARG SWIFT_CONFIGURATION
+ARG EXEC_NAME
+
 # Install OS updates
 RUN export DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true \
     && apt-get -q update \
     && apt-get -q dist-upgrade -y \
     && apt-get install -y libjemalloc-dev
 
-# Set up a build area
-WORKDIR /build
-
-# First just resolve dependencies.
-# This creates a cached layer that can be reused
-# as long as your Package.swift/Package.resolved
-# files do not change.
-COPY ./Package.* ./
-RUN swift package resolve --skip-update \
-        $([ -f ./Package.resolved ] && echo "--force-resolved-versions" || true)
-
-# Copy entire repo into container
-COPY . .
-
-# Build everything, with optimizations, with static linking, and using jemalloc
-# N.B.: The static version of jemalloc is incompatible with the static Swift runtime.
-RUN swift build \
-        -c release \
-        --product Penny \
-        --static-swift-stdlib \
-        -Xlinker -ljemalloc
-
-# Switch to the staging area
 WORKDIR /staging
 
 # Copy main executable to staging area
-RUN cp "$(swift build --package-path /build -c release --show-bin-path)/Penny" ./
+COPY .build/$SWIFT_CONFIGURATION/$EXEC_NAME ./
 
 # Copy static swift backtracer binary to staging area
 RUN cp "/usr/libexec/swift/linux/swift-backtrace-static" ./