test the family directive functionality

Author: bedroge

.github/workflows/tests_eessi_module.yml

@@ -258,7 +258,7 @@ jobs:
           # Initialise Lmod
           . /cvmfs/software.eessi.io/versions/${{matrix.EESSI_VERSION}}/compat/linux/$(uname -m)/usr/share/Lmod/init/bash
           
-          # Make sure we using the module file from the repository
+          # Make sure we are using the module file from the repository
           export MODULEPATH=init/modules
           
           # Set the relevant environment variable and load the EESSI module
@@ -269,3 +269,46 @@ jobs:
           # Purge and check the module is still loaded
           module purge
           module list |& grep "EESSI/${{matrix.EESSI_VERSION}}"
+
+  check_family_eessi_module:
+    runs-on: ubuntu-24.04
+    strategy:
+      fail-fast: false
+      matrix:
+        EESSI_VERSION:
+          - '2023.06'
+          - '2025.06'
+
+    steps:
+      - name: Check out software-layer repository
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+
+      - name: Mount EESSI CernVM-FS repository
+        uses: cvmfs-contrib/github-action-cvmfs@55899ca74cf78ab874bdf47f5a804e47c198743c # v4.0
+        with:
+          cvmfs_config_package: https://github.com/EESSI/filesystem-layer/releases/download/latest/cvmfs-config-eessi_latest_all.deb
+          cvmfs_http_proxy: DIRECT
+          cvmfs_repositories: software.eessi.io
+
+      - name: Make sure we can use the family directive in the EESSI module
+        run: |
+          # Initialise Lmod
+          . /cvmfs/software.eessi.io/versions/${{matrix.EESSI_VERSION}}/compat/linux/$(uname -m)/usr/share/Lmod/init/bash
+
+          # Add a test modulefile for a dummy stack with a "software_stack" family directive
+          FAMILY=software_stack
+          TMP_MODULEFILES=$(mktemp -d)
+          LOCAL_STACK_NAME="local_stack"
+          LOCAL_STACK_VERSION="${{matrix.EESSI_VERSION}}"
+          mkdir -p "${TMP_MODULEFILES}/${LOCAL_STACK_NAME}"
+          echo "family(\"${FAMILY}\")" > "${TMP_MODULEFILES}/${LOCAL_STACK_NAME}/${LOCAL_STACK_VERSION}"
+
+          # Make sure we are using the EESSImodule file from the repository and the temporary one for the dummy local stack
+          export MODULEPATH=init/modules:${TMP_MODULEFILES}
+
+          # Set the relevant environment variable, load the EESSI module and the local stack module, and grep for
+          # Lmod is automatically replacing "..." with "...".
+          export EESSI_MODULE_FAMILY_NAME=${FAMILY}
+          module load "EESSI/${{matrix.EESSI_VERSION}}"
+          GREP_PATTERN="Lmod is automatically replacing \"EESSI/${{matrix.EESSI_VERSION}}" with \"${LOCAL_STACK_NAME}/${LOCAL_STACK_VERSION}\"."
+          module load "${LOCAL_STACK_NAME}/${LOCAL_STACK_VERSION}" |& grep "${GREP_PATTERN}"