deployment and dockerfile improvements

.github/workflows/mmbm-deploy.yml

@@ -6,10 +6,65 @@ on:
 jobs:
   deploy:
     runs-on: ubuntu-latest
+    container: swift:6.0-jammy
     steps:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Install zstd
+        run: |
+          apt-get update -y
+          apt-get install -y zstd
+
+      - name: Restore .build
+        id: "restore-build"
+        uses: actions/cache/restore@v4
+        with:
+          path: .build
+          key: "swiftpm-deploy-build-${{ runner.os }}-${{ github.event.pull_request.base.sha || github.event.after }}"
+          restore-keys: "swiftpm-deploy-build-${{ runner.os }}-"
+
+      - name: Build App
+        run: |
+          apt-get update -y
+          apt-get install -y libjemalloc-dev
+          swift build \
+            -c release \
+            --static-swift-stdlib \
+            -Xlinker -ljemalloc \
+            $([ -f ./Package.resolved ] && echo "--force-resolved-versions" || true)
+
+      - name: Cache .build
+        if: steps.restore-build.outputs.cache-hit != 'true'
+        uses: actions/cache/save@v4
+        with:
+          path: .build
+          key: "swiftpm-deploy-build-${{ runner.os }}-${{ github.event.pull_request.base.sha || github.event.after }}"
+
+      - name: Install Docker
+        run: |
+          set -eu
+
+          # https://docs.docker.com/engine/install/ubuntu/#install-using-the-repository
+
+          # Add Docker's official GPG key:
+          apt-get update -y
+          apt-get install ca-certificates curl gnupg -y
+          install -m 0755 -d /etc/apt/keyrings
+          curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
+          chmod a+r /etc/apt/keyrings/docker.gpg
+
+          # Add the repository to Apt sources:
+          # shellcheck source=/dev/null
+          echo \
+            "deb [arch=\"$(dpkg --print-architecture)\" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
+              \"$(. /etc/os-release && echo "$VERSION_CODENAME")\" stable" |
+            tee /etc/apt/sources.list.d/docker.list >/dev/null
+          apt-get update -y
+
+          # Install Docker:
+          apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin -y
+
       - name: Build image
         run: docker build --network=host -t app:latest -f template-dockerfile .
 

template-dockerfile

@@ -3,37 +3,13 @@
 # ================================
 FROM swift:6.0-noble AS build
 
-# 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 \
-        $([ -f ./Package.resolved ] && echo "--force-resolved-versions" || true)
+WORKDIR /staging
 
 # Copy entire repo into container
 COPY . .
 
-# Build the application, 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 \
-        --static-swift-stdlib \
-        -Xlinker -ljemalloc
-
-# Switch to the staging area
-WORKDIR /staging
-
 # Copy main executable to staging area
-RUN cp "$(swift build --package-path /build -c release --show-bin-path)/Penny" ./
+RUN cp "$(swift build -c release --show-bin-path)/Penny" ./
 
 # Copy static swift backtracer binary to staging area
 RUN cp "/usr/libexec/swift/linux/swift-backtrace-static" ./