Add spack repo only if it doesn't exist.

templates/common/build_icon.sh

@@ -18,7 +18,10 @@ SPACK_BUILD_ICON="%spack.build_cmd%"
 if [ ! -z "$SPACK_BUILD_ICON" ]; then
   echo "Installing ICON with spack!"
   echo "cmd=$SPACK_BUILD_ICON"
-  spack repo add ${WORKDIR}/proj/spack_repo
+  # In case the autosubmit repository with the icon-nwp receipt doesn't exist, add it
+  if [ $(spack repo list | grep autosubmit-icon-repository -q) ]; then
+    spack repo add ${WORKDIR}/proj/spack_repo
+  fi
   spack install $SPACK_BUILD_ICON
   spack load $SPACK_BUILD_ICON
 else