Automatically use latest opam release

.gitlab-ci.yml

@@ -7,6 +7,10 @@ make-targets:
         | jq -r 'map(.tag_name | split(".") | {"maj":.[0:2], "pat":.}) | group_by(.maj) | .[] | max | .pat | join(".")'
         | tail -n +3
         > versions
+    - curl https://api.github.com/repos/ocaml/opam/releases
+        | jq -r 'map(.tag_name | split(".") | {"maj":.[0:2], "pat":.}) | group_by(.maj) | .[] | max | .pat | join(".")'
+        | tail -n 1
+        > opam-version
     - |
       { for v in $(cat versions); do
           echo "ocaml-image-$v:";
@@ -15,8 +19,9 @@ make-targets:
           echo "    OCAML_VERSION: $v";
           echo;
         done;
-        echo "variables:"
+        echo "variables:";
         echo "  LATEST_OCAML_VERSION: $(tail -n1 versions)";
+        echo "  OPAM_VERSION: $(cat opam-version)";
       } > ocaml-images.yml
   artifacts:
     paths:

ocaml-images-gen.yml

@@ -21,6 +21,7 @@
   - /kaniko/executor --cache=true
       --context=$CI_PROJECT_DIR
       --dockerfile=$CI_PROJECT_DIR/Dockerfile
+      --build-arg=OPAM_VERSION=$OPAM_VERSION
       --build-arg=OCAML_VERSION=$OCAML_VERSION
       --build-arg=LAST_REPO_UPDATE=$(date +%s)
       --destination=$CI_REGISTRY_IMAGE:${OCAML_VERSION}