release-cuda: minor refactoring and comments

pkgs/top-level/release-cuda.nix

@@ -72,11 +72,16 @@ let
     ;
 
   # Package sets to evaluate whole
-  packageSets = builtins.filter (lib.strings.hasPrefix "cudaPackages") (builtins.attrNames pkgs);
-  evalPackageSet = pset: packagePlatforms pkgs.${pset};
+  # Derivations from these package sets are selected based on the value
+  # of their meta.{hydraPlatforms,platforms,badPlatforms} attributes
+  autoPackageSets = builtins.filter (lib.strings.hasPrefix "cudaPackages") (builtins.attrNames pkgs);
+  autoPackagePlatforms = lib.genAttrs autoPackageSets (pset: packagePlatforms pkgs.${pset});
 
-  jobs =
-    mapTestOn {
+  # Explicitly select additional packages to also evaluate
+  # The desired platforms must be set explicitly here
+  explicitPackagePlatforms =
+    # This comment prevents nixfmt from changing the indentation level, lol
+    {
       blas = linux;
       blender = linux;
       faiss = linux;
@@ -159,7 +164,11 @@ let
         vidstab = linux;
         vllm = linux;
       };
-    }
-    // mapTestOn (lib.genAttrs packageSets evalPackageSet);
+    };
+
+  # Explicitly specified platforms take precedence over the platforms
+  # automatically inferred in autoPackagePlatforms
+  allPackagePlatforms = lib.recursiveUpdate autoPackagePlatforms explicitPackagePlatforms;
+  jobs = mapTestOn allPackagePlatforms;
 in
 jobs