Add cicd-ext CI configuration

.cscs-ci/container/build.Containerfile

@@ -0,0 +1,20 @@
+ARG DEPS_IMAGE
+FROM $DEPS_IMAGE
+
+COPY . /oomph
+WORKDIR /oomph
+
+ARG BACKEND
+ARG NUM_PROCS
+RUN spack -e ci build-env oomph -- \
+        cmake -G Ninja -B build \
+            -DCMAKE_BUILD_TYPE=Debug \
+            -DOOMPH_WITH_TESTING=ON \
+            -DOOMPH_WITH_$(echo $BACKEND | tr '[:lower:]' '[:upper:]')=ON \
+            -DOOMPH_USE_BUNDLED_LIBS=ON \
+            -DOOMPH_USE_BUNDLED_HWMALLOC=OFF \
+            -DMPIEXEC_EXECUTABLE="" \
+            -DMPIEXEC_NUMPROC_FLAG="" \
+            -DMPIEXEC_PREFLAGS="" \
+            -DMPIEXEC_POSTFLAGS="" && \
+    spack -e ci build-env oomph -- cmake --build build -j$NUM_PROCS

.cscs-ci/container/deps.Containerfile

@@ -0,0 +1,24 @@
+ARG BASE_IMAGE
+FROM $BASE_IMAGE
+
+ARG SPACK_SHA
+RUN mkdir -p /opt/spack && \
+    curl -fLsS "https://api.github.com/repos/spack/spack/tarball/$SPACK_SHA" | tar --strip-components=1 -xz -C /opt/spack
+
+ENV PATH="/opt/spack/bin:$PATH"
+
+ARG SPACK_PACKAGES_SHA
+RUN mkdir -p /opt/spack-packages && \
+    curl -fLsS "https://api.github.com/repos/spack/spack-packages/tarball/$SPACK_PACKAGES_SHA" | tar --strip-components=1 -xz -C /opt/spack-packages
+
+RUN spack repo remove --scope defaults:base builtin && \
+    spack repo add --scope site /opt/spack-packages/repos/spack_repo/builtin
+
+ARG SPACK_ENV_FILE
+COPY $SPACK_ENV_FILE /spack_environment/spack.yaml
+
+ARG NUM_PROCS
+RUN spack external find --all && \
+    spack env create ci /spack_environment/spack.yaml && \
+    spack -e ci concretize -f && \
+    spack -e ci install --jobs $NUM_PROCS --fail-fast --only=dependencies

.cscs-ci/default.yaml

@@ -0,0 +1,188 @@
+include:
+  - remote: 'https://gitlab.com/cscs-ci/recipes/-/raw/master/templates/v2/.ci-ext.yml'
+
+variables:
+  BASE_IMAGE: jfrog.svc.cscs.ch/docker-group-csstaff/alps-images/ngc-pytorch:26.01-py3-alps3
+  SPACK_SHA: v1.1.1
+  SPACK_PACKAGES_SHA: bc93746ce936d6653271b6e98f6df6ee28f64e84 # develop on 2026-03-25
+  FF_TIMESTAMPS: true
+
+.build_deps_template:
+  timeout: 1 hour
+  before_script:
+    - echo $DOCKERHUB_TOKEN | podman login docker.io -u $DOCKERHUB_USERNAME --password-stdin || true
+    - export DOCKERFILE_SHA=`sha256sum .cscs-ci/container/deps.Containerfile | head -c 16`
+    - export ENV_FILE_SHA=`sha256sum ${SPACK_ENV_FILE} | head -c 16`
+    - export CONFIG_TAG=`echo $DOCKERFILE_SHA-$BASE_IMAGE-$SPACK_SHA-$SPACK_PACKAGES_SHA-$ENV_FILE_SHA | sha256sum - | head -c 16`
+    - export PERSIST_IMAGE_NAME=$CSCS_REGISTRY_PATH/oomph-spack-deps-$BACKEND:$CONFIG_TAG
+    - echo -e "CONFIG_TAG=$CONFIG_TAG" >> base-${BACKEND}.env
+    - echo -e "DEPS_IMAGE=$PERSIST_IMAGE_NAME" >> base-${BACKEND}.env
+  variables:
+    DOCKERFILE: .cscs-ci/container/deps.Containerfile
+    DOCKER_BUILD_ARGS: '["BASE_IMAGE", "SPACK_SHA", "SPACK_PACKAGES_SHA", "SPACK_ENV_FILE"]'
+    SPACK_ENV_FILE: .cscs-ci/spack/$BACKEND.yaml
+  artifacts:
+    reports:
+      dotenv: base-${BACKEND}.env
+
+# TODO: NCCL will be enabled in https://github.com/ghex-org/oomph/pull/55
+# build_deps_nccl:
+#   variables:
+#     BACKEND: nccl
+#   extends:
+#     - .container-builder-cscs-gh200
+#     - .build_deps_template
+
+build_deps_mpi:
+  variables:
+    BACKEND: mpi
+  extends:
+    - .container-builder-cscs-gh200
+    - .build_deps_template
+
+build_deps_ucx:
+  variables:
+    BACKEND: ucx
+  extends:
+    - .container-builder-cscs-gh200
+    - .build_deps_template
+
+build_deps_libfabric:
+  variables:
+    BACKEND: libfabric
+  extends:
+    - .container-builder-cscs-gh200
+    - .build_deps_template
+
+.build_template:
+  extends: .container-builder-cscs-gh200
+  timeout: 15 minutes
+  before_script:
+    - echo $DOCKERHUB_TOKEN | podman login docker.io -u $DOCKERHUB_USERNAME --password-stdin || true
+    - export PERSIST_IMAGE_NAME=$CSCS_REGISTRY_PATH/oomph-build-$BACKEND:$CI_COMMIT_SHA
+    - echo -e "BUILD_IMAGE=$PERSIST_IMAGE_NAME" >> build-${BACKEND}.env
+  variables:
+    DOCKERFILE: .cscs-ci/container/build.Containerfile
+    DOCKER_BUILD_ARGS: '["DEPS_IMAGE", "BACKEND"]'
+  artifacts:
+    reports:
+      dotenv: build-${BACKEND}.env
+
+# TODO: NCCL will be enabled in https://github.com/ghex-org/oomph/pull/55
+# build_nccl:
+#   variables:
+#     BACKEND: nccl
+#   extends: .build_template
+#   needs:
+#     - job: build_deps_nccl
+#       artifacts: true
+
+build_mpi:
+  variables:
+    BACKEND: mpi
+  extends: .build_template
+  needs:
+    - job: build_deps_mpi
+      artifacts: true
+
+build_ucx:
+  variables:
+    BACKEND: ucx
+  extends: .build_template
+  needs:
+    - job: build_deps_ucx
+      artifacts: true
+
+build_libfabric:
+  variables:
+    BACKEND: libfabric
+  extends: .build_template
+  needs:
+    - job: build_deps_libfabric
+      artifacts: true
+
+.test_template_base:
+  extends: .container-runner-clariden-gh200
+  variables:
+    SLURM_JOB_NUM_NODES: 1
+    SLURM_GPUS_PER_TASK: 1
+    SLURM_TIMELIMIT: '5:00'
+    SLURM_PARTITION: normal
+    SLURM_MPI_TYPE: pmix
+    SLURM_NETWORK: disable_rdzv_get
+    SLURM_LABELIO: 1
+    SLURM_UNBUFFEREDIO: 1
+    PMIX_MCA_psec: native
+    PMIX_MCA_gds: "^shmem2"
+    USE_MPI: NO
+
+.test_serial_template:
+  extends: .test_template_base
+  variables:
+    SLURM_NTASKS: 1
+  script:
+    - ctest --test-dir /oomph/build -L "serial" --output-on-failure --timeout 60 --parallel 8
+
+.test_parallel_template:
+  extends: .test_template_base
+  variables:
+    SLURM_NTASKS: 4
+  script:
+    - ctest --test-dir /oomph/build -L "parallel-ranks-4" --output-on-failure --timeout 60
+
+# TODO: NCCL will be enabled in https://github.com/ghex-org/oomph/pull/55
+# test_serial_nccl:
+#   extends: .test_serial_template
+#   needs:
+#     - job: build_nccl
+#       artifacts: true
+#   image: $BUILD_IMAGE
+
+# test_parallel_nccl:
+#   extends: .test_parallel_template
+#   needs:
+#     - job: build_nccl
+#       artifacts: true
+#   image: $BUILD_IMAGE
+
+test_serial_mpi:
+  extends: .test_serial_template
+  needs:
+    - job: build_mpi
+      artifacts: true
+  image: $BUILD_IMAGE
+
+test_parallel_mpi:
+  extends: .test_parallel_template
+  needs:
+    - job: build_mpi
+      artifacts: true
+  image: $BUILD_IMAGE
+
+test_serial_ucx:
+  extends: .test_serial_template
+  needs:
+    - job: build_ucx
+      artifacts: true
+  image: $BUILD_IMAGE
+
+test_parallel_ucx:
+  extends: .test_parallel_template
+  needs:
+    - job: build_ucx
+      artifacts: true
+  image: $BUILD_IMAGE
+
+test_serial_libfabric:
+  extends: .test_serial_template
+  needs:
+    - job: build_libfabric
+      artifacts: true
+  image: $BUILD_IMAGE
+
+test_parallel_libfabric:
+  extends: .test_parallel_template
+  needs:
+    - job: build_libfabric
+      artifacts: true
+  image: $BUILD_IMAGE

.cscs-ci/spack/libfabric.yaml

@@ -0,0 +1,6 @@
+spack:
+  specs:
+  - oomph@main backend=libfabric +cuda
+  view: false
+  concretizer:
+    unify: true

.cscs-ci/spack/mpi.yaml

@@ -0,0 +1,6 @@
+spack:
+  specs:
+  - oomph@main backend=mpi +cuda
+  view: false
+  concretizer:
+    unify: true

.cscs-ci/spack/nccl.yaml

@@ -0,0 +1,6 @@
+spack:
+  specs:
+  - oomph@main backend=nccl +cuda
+  view: false
+  concretizer:
+    unify: true

.cscs-ci/spack/ucx.yaml

@@ -0,0 +1,6 @@
+spack:
+  specs:
+  - oomph@main backend=ucx +cuda
+  view: false
+  concretizer:
+    unify: true

test/CMakeLists.txt

@@ -48,6 +48,7 @@ function(reg_serial_test t)
     add_test(
         NAME ${t}
         COMMAND $<TARGET_FILE:${t}>)
+    set_tests_properties(${t} PROPERTIES LABELS "serial")
 endfunction()
 
 foreach(t ${serial_tests})
@@ -61,11 +62,15 @@ function(reg_parallel_test t_ lib n)
     oomph_target_compile_options(${t})
     target_link_libraries(${t} PRIVATE gtest_main_mpi)
     target_link_libraries(${t} PRIVATE oomph_${lib})
-    add_test(
-        NAME ${t}
-        COMMAND ${MPIEXEC_EXECUTABLE} ${MPIEXEC_NUMPROC_FLAG} ${n} ${MPIEXEC_PREFLAGS}
-            $<TARGET_FILE:${t}> ${MPIEXEC_POSTFLAGS})
-    set_tests_properties(${t} PROPERTIES RUN_SERIAL TRUE)
+    if("${MPIEXEC_EXECUTABLE}" STREQUAL "")
+      add_test(NAME ${t} COMMAND $<TARGET_FILE:${t}>)
+    else()
+      add_test(
+          NAME ${t}
+          COMMAND ${MPIEXEC_EXECUTABLE} ${MPIEXEC_NUMPROC_FLAG} ${n} ${MPIEXEC_PREFLAGS}
+              $<TARGET_FILE:${t}> ${MPIEXEC_POSTFLAGS})
+    endif()
+    set_tests_properties(${t} PROPERTIES RUN_SERIAL TRUE LABELS "parallel-ranks-${n}")
 endfunction()
 
 if (OOMPH_WITH_MPI)

test/bindings/fortran/CMakeLists.txt

@@ -25,12 +25,17 @@ function(reg_parallel_test_f t_ lib n nthr)
         $<INSTALL_INTERFACE:..>
         $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/../../..>
         $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/../../..>)
-    add_test(
-        NAME ${t}
-        COMMAND ${MPIEXEC_EXECUTABLE} ${MPIEXEC_NUMPROC_FLAG} ${n} ${MPIEXEC_PREFLAGS}
-            $<TARGET_FILE:${t}> ${MPIEXEC_POSTFLAGS})
+    if("${MPIEXEC_EXECUTABLE}" STREQUAL "")
+      add_test(NAME ${t} COMMAND $<TARGET_FILE:${t}>)
+    else()
+      add_test(
+          NAME ${t}
+          COMMAND ${MPIEXEC_EXECUTABLE} ${MPIEXEC_NUMPROC_FLAG} ${n} ${MPIEXEC_PREFLAGS}
+              $<TARGET_FILE:${t}> ${MPIEXEC_POSTFLAGS})
+    endif()
     set_tests_properties(${t} PROPERTIES
-        ENVIRONMENT OMP_NUM_THREADS=${nthr})
+        ENVIRONMENT OMP_NUM_THREADS=${nthr}
+        LABELS "parallel-ranks-${n}")
 endfunction()
 
 if (OOMPH_WITH_MPI)