More cache fiddling.

Only on freebsd-amd64 now though... no need to leave stuff laying
everywhere.

.gitlab-ci-unix.yml

@@ -188,6 +188,39 @@ spec:
       - "src/sbbs3/git_*.h"
   needs: []
 
+"$[[ inputs.os ]]-$[[ inputs.platform ]] [cache-thing]":
+  extends:
+    - .$[[ inputs.os ]]-build
+  script:
+    - touch cache-me
+  cache:
+    key: "$[[ inputs.os ]]-${CI_PIPELINE_ID}-gitinfo"
+    paths:
+      - cache-me
+    policy: push
+  dependencies: []
+  rules:
+    - if: '"$[[ inputs.os ]]" != "freebsd"'
+      when: never
+    - if: '"$[[ inputs.platform ]]" != "amd64"'
+      when: never
+
+"$[[ inputs.os ]]-$[[ inputs.platform ]] [cleanup]":
+  stage: cleanup
+  extends:
+    - .$[[ inputs.os ]]-build
+  script:
+    - echo "Delete ${CI_PIPELINE_ID}-gitinfo"
+  cache:
+    key: "$[[ inputs.os ]]-${CI_PIPELINE_ID}-gitinfo"
+    policy: push
+  dependencies: []
+  rules:
+    - if: '"$[[ inputs.os ]]" != "freebsd"'
+      when: never
+    - if: '"$[[ inputs.platform ]]" != "amd64"'
+      when: never
+
 "$[[ inputs.os ]]-$[[ inputs.platform ]] [scfg]":
   extends:
     - .$[[ inputs.os ]]-build