fix(ci): docker build, use --ssh instead of -v

.github/workflows/continuous-integration.yml

@@ -689,16 +689,11 @@ jobs:
       - name: Login to Registry
         run: echo "${{ secrets.GHCR_PASSWORD }}" | docker login -u ${{ secrets.GHCR_LOGIN }} --password-stdin ghcr.io
 
-      - name: Set up ssh auth in docker
-        run: |
-          echo "SSH_AUTH_SOCK_DIR=$(dirname $SSH_AUTH_SOCK)" >> "${GITHUB_ENV}"
-
       # label was initially a need from the frontend CI
       - name: Build Image
         run: |
-          docker image build --no-cache \
-            -v ${{ env.SSH_AUTH_SOCK }}:/ssh.socket \
-            -e SSH_AUTH_SOCK=/ssh.socket \
+          DOCKER_BUILDKIT=1 docker build --no-cache \
+            --ssh default=${{ env.SSH_AUTH_SOCK }} \
             --label "commit-sha=${{ github.sha }}" -t ${{ matrix.image }} -f ${{ matrix.dockerfile }} .
 
       - name: Tag and Publish Image

builders/Dockerfile.concrete-compiler-env

@@ -5,6 +5,9 @@ FROM quay.io/pypa/manylinux_2_28_x86_64:2022-11-19-1b19e81
 RUN dnf install -y epel-release
 RUN dnf update -y
 RUN dnf install -y ninja-build hwloc-devel ccache clang ncurses-devel
+RUN dnf install -y openssh-clients
+RUN dnf clean all
+RUN mkdir -p ~/.ssh/ && ssh-keyscan -t rsa github.com >> ~/.ssh/known_hosts
 # setup ccache with an unlimited amount of files and storage
 RUN ccache -M 0
 RUN ccache -F 0
@@ -38,7 +41,7 @@ COPY /llvm-project /llvm-project
 COPY /compiler /compiler
 WORKDIR /compiler
 RUN mkdir -p /build
-RUN make DATAFLOW_EXECUTION_ENABLED=ON BUILD_DIR=/build CCACHE=ON \
+RUN --mount=type=ssh make DATAFLOW_EXECUTION_ENABLED=ON BUILD_DIR=/build CCACHE=ON \
     Python3_EXECUTABLE=${PYTHON_EXEC} \
     concretecompiler python-bindings rust-bindings
 ENV PYTHONPATH "$PYTHONPATH:/build/tools/concretelang/python_packages/concretelang_core"