Simplify

.gitlab-ci.yml

@@ -7,11 +7,9 @@ make-targets:
         | jq -r 'map(.tag_name | split(".") | {"maj":.[0:2], "pat":.}) | group_by(.maj) | .[] | max | .pat | join(".")'
         | tail -n +3
         > versions
-    - cat ocaml-image.yml.pre > ocaml-images.yml
+    - sed "s/%LATEST_OCAML_VERSION%/$(tail -n1 versions)/g" ocaml-image.yml.pre > ocaml-images.yml
     - for v in $(cat versions); do
-          sed "s/%OCAML_VERSION%/$v/g; s/%LATEST_OCAML_VERSION%/$(tail -n1 versions)/g"
-            ocaml-image.yml.in
-          >> ocaml-images.yml;
+          sed "s/%OCAML_VERSION%/$v/g" ocaml-image.yml.in >> ocaml-images.yml;
         done
   artifacts:
     paths:

ocaml-image.yml.pre

@@ -3,6 +3,8 @@
   image:
     name: gcr.io/kaniko-project/executor:debug
     entrypoint: [""]
+  variables:
+    LATEST_OCAML_VERSION: %LATEST_OCAML_VERSION%
   script:
   - |
     echo "{