Des-ambiguating the specs to cache

.gitlab-ci.yml

@@ -126,6 +126,14 @@ spack:install_compilers:
       --types
       ${COMPILER_LIST_SPECS}
 
+    - spack/bin/spack spec
+      --install-status
+      --namespaces
+      --long
+      --types
+      --json
+      ${COMPILER_LIST_SPECS} | compliers_spec.json
+
     - spack/bin/spack install
       --log-file spack-install.xml
       --log-format junit
@@ -136,7 +144,7 @@ spack:install_compilers:
     - spack/bin/spack buildcache create
       --update-index
       --key EDC904DCE3D2E84E
-      /buildcache ${COMPILER_LIST_SPECS}
+      /buildcache $( jq -r '.spec.nodes | map("/\(.hash)") | join(" ")' compilers_spec.json )
 
     - |
       echo 'definitions: [ compilers: [' ${COMPILER_LIST_SPECS} ']]' > compiler_definitions.yaml
@@ -149,6 +157,9 @@ spack:install_compilers:
   artifacts:
     reports:
       junit: spack-install.xml
+    paths:
+      - compilers_spec.json
+
   needs:
     - job: spack:setup