Fix complex mode in dolfinx/dolfinx and dolfinx/lab images (#2217)

Probably related to a change in the way that pip builds packages.

Co-authored-by: Jack S. Hale <mail@jackhale.co.uk>

.github/workflows/docker.yml

@@ -273,10 +273,12 @@ jobs:
         run: |
           docker buildx build --file dolfinx/docker/Dockerfile ${DOCKER_BUILD_ARGS} \
             --target lab --tag dolfinx/lab .
-      - name: Run basic test inside container
+      - name: Run basic tests inside container
         run: |
           docker run --rm dolfinx/dolfinx \
             python3 -c "import dolfinx; from dolfinx.fem import FunctionSpace; from dolfinx.mesh import create_unit_square; from mpi4py import MPI; mesh = create_unit_square(MPI.COMM_WORLD, 10, 10); V = FunctionSpace(mesh, ('Lagrange', 1));"
+          docker run --rm dolfinx/dolfinx \
+            /bin/bash -c "source /usr/local/bin/dolfinx-complex-mode && python3 -c $'import dolfinx; from dolfinx.fem import FunctionSpace; from dolfinx.mesh import create_unit_square; from mpi4py import MPI; mesh = create_unit_square(MPI.COMM_WORLD, 10, 10); V = FunctionSpace(mesh, (\"Lagrange\", 1));'"
       - name: Log into the DockerHub registry
         run: echo ${{ secrets.DOCKERHUB_TOKEN }} | docker login -u ${{ secrets.DOCKERHUB_USERNAME }} --password-stdin
       - name: Push to the DockerHub registry

docker/Dockerfile

@@ -418,15 +418,16 @@ ONBUILD RUN cd dolfinx && \
     PETSC_ARCH=linux-gnu-real-32 cmake -G Ninja -DCMAKE_INSTALL_PREFIX=/usr/local/dolfinx-real -DCMAKE_BUILD_TYPE=${DOLFINX_CMAKE_BUILD_TYPE} -DCMAKE_CXX_FLAGS=${DOLFINX_CMAKE_CXX_FLAGS} ../cpp && \
     ninja install && \
     cd ../python && \
-    CXXFLAGS=${DOLFINX_CMAKE_CXX_FLAGS} PETSC_ARCH=linux-gnu-real-32 pip3 install --target /usr/local/dolfinx-real/lib/python${PYTHON_VERSION}/dist-packages --no-dependencies . && \
+    CXXFLAGS=${DOLFINX_CMAKE_CXX_FLAGS} PETSC_ARCH=linux-gnu-real-32 pip3 install -v --target /usr/local/dolfinx-real/lib/python${PYTHON_VERSION}/dist-packages --no-dependencies --no-cache-dir . && \
+    git clean -fdx && \
     cd ../ && \
     mkdir -p build-complex && \
     cd build-complex && \
     PETSC_ARCH=linux-gnu-complex-32 cmake -G Ninja -DCMAKE_INSTALL_PREFIX=/usr/local/dolfinx-complex -DCMAKE_BUILD_TYPE=${DOLFINX_CMAKE_BUILD_TYPE} -DCMAKE_CXX_FLAGS=${DOLFIN_CMAKE_CXX_FLAGS} ../cpp && \
     ninja install && \
     . /usr/local/dolfinx-complex/lib/dolfinx/dolfinx.conf && \
     cd ../python && \
-    CXXFLAGS=${DOLFINX_CMAKE_CXX_FLAGS} PETSC_ARCH=linux-gnu-complex-32 pip3 install --target /usr/local/dolfinx-complex/lib/python${PYTHON_VERSION}/dist-packages --no-dependencies .
+    CXXFLAGS=${DOLFINX_CMAKE_CXX_FLAGS} PETSC_ARCH=linux-gnu-complex-32 pip3 install -v --target /usr/local/dolfinx-complex/lib/python${PYTHON_VERSION}/dist-packages --no-dependencies --no-cache-dir .
 
 # Real by default.
 ONBUILD ENV PKG_CONFIG_PATH=/usr/local/dolfinx-real/lib/pkgconfig:$PKG_CONFIG_PATH \