add meta attributes to all images

augment the images with meta attributes from the input packages.

and then use the meta.description as dockerhub metadata.

lib/buildCLIImage.nix

@@ -5,28 +5,32 @@
 { drv # derivation to build the image for
 # Name of the binary to run by default
 , binName ? (builtins.parseDrvName drv.name).name
+, meta ? drv.meta
 }:
-dockerTools.buildLayeredImage {
-  name = drv.name;
+let
+  image = dockerTools.buildLayeredImage {
+    name = drv.name;
 
-  contents = [
-    # add a /bin/sh on all images
-    busybox
-    # most program need TLS certs
-    cacert
-    drv
-  ];
-
-  config = {
-    Cmd = [ "/bin/${binName}" ];
-    Env = [
-      "PATH=/bin"
-      "SSL_CERT_FILE=${cacert}/etc/ssl/certs/ca-bundle.crt"
+    contents = [
+      # add a /bin/sh on all images
+      busybox
+      # most program need TLS certs
+      cacert
+      drv
     ];
-    Labels = {
-      # https://github.com/microscaling/microscaling/blob/55a2d7b91ce7513e07f8b1fd91bbed8df59aed5a/Dockerfile#L22-L33
-      "org.label-schema.vcs-ref" = "master";
-      "org.label-schema.vcs-url" = "https://github.com/nix-community/docker-nixpkgs";
+
+    config = {
+      Cmd = [ "/bin/${binName}" ];
+      Env = [
+        "PATH=/bin"
+        "SSL_CERT_FILE=${cacert}/etc/ssl/certs/ca-bundle.crt"
+      ];
+      Labels = {
+        # https://github.com/microscaling/microscaling/blob/55a2d7b91ce7513e07f8b1fd91bbed8df59aed5a/Dockerfile#L22-L33
+        "org.label-schema.vcs-ref" = "master";
+        "org.label-schema.vcs-url" = "https://github.com/nix-community/docker-nixpkgs";
+      };
     };
   };
-}
+in
+  image // { meta = meta // image.meta; }