pkgs/top-level/release.nix: Don't include non-Hydra attributes with attrNamesOnly

The attrNamesOnly feature is used by
pkgs/top-level/release-attrpaths-superset.nix to return a superset of
all attributes that might be built by Hydra.

Before this change it would include all attribute paths to derivations that could
be found recursively, ignoring the recurseForDerivations and
recurseForRelease attributes that control Hydra's recursion.

This had the effect that it would end up with ~266000 attributes, most of which definitely won't be built by Hydra. We can remove those while staying true to the superset notion to end up with just ~97000, a reduction of ~63.6%! This also comes with an eval time reduction from 31.7s to 18.7s (-41.0%)!

As an example, all derivations in pypy310Packages don't get included
anymore, because it doesn't have a `.recurseForDerivations` set.

As a nice side effect, with `--arg enableWarnings false`, no more
warnings are printed, because things like
`checkpointBuildTools.mkCheckpointedBuild` (which is deprecated) isn't
being recursed to anymore.

pkgs/top-level/release-lib.nix

@@ -163,19 +163,26 @@ let
     (addMetaAttrs { maintainers = crossMaintainers; });
 
 
-  /* Recursively map a (nested) set of derivations to an isomorphic
+  /* Recursive for packages and apply a function to them */
-     set of meta.platforms values. */
+  recursiveMapPackages = f: mapAttrs (name: value:
-  packagePlatforms = mapAttrs (name: value:
       if isDerivation value then
-        value.meta.hydraPlatforms
+        f value
-          or (subtractLists (value.meta.badPlatforms or [])
-               (value.meta.platforms or supportedSystems))
       else if value.recurseForDerivations or false || value.recurseForRelease or false then
-        packagePlatforms value
+        recursiveMapPackages f value
       else
         []
     );
 
+  /* Gets the list of Hydra platforms for a derivation */
+  getPlatforms = drv:
+    drv.meta.hydraPlatforms
+      or (subtractLists (drv.meta.badPlatforms or [])
+           (drv.meta.platforms or supportedSystems));
+
+  /* Recursively map a (nested) set of derivations to an isomorphic
+     set of meta.platforms values. */
+  packagePlatforms = recursiveMapPackages getPlatforms;
+
 in {
   /* Common platform groups on which to test packages. */
   inherit (platforms) unix linux darwin cygwin all;
@@ -188,6 +195,8 @@ in {
     lib
     mapTestOn
     mapTestOnCross
+    recursiveMapPackages
+    getPlatforms
     packagePlatforms
     pkgs
     pkgsFor

pkgs/top-level/release.nix

@@ -321,8 +321,9 @@ let
   # Conflicts usually cause silent job drops like in
   #   https://github.com/NixOS/nixpkgs/pull/182058
   jobs = let
-    packagePlatforms = if attrNamesOnly then id else release-lib.packagePlatforms;
+    packagePlatforms = release-lib.recursiveMapPackages
-    packageJobs = {
+      (if attrNamesOnly then id else release-lib.getPlatforms);
+    packageJobs = packagePlatforms pkgs // {
       haskell.compiler = packagePlatforms pkgs.haskell.compiler;
       haskellPackages = packagePlatforms pkgs.haskellPackages;
       # Build selected packages (HLS) for multiple Haskell compilers to rebuild
@@ -363,8 +364,8 @@ let
     };
     mapTestOn-packages =
       if attrNamesOnly
-      then pkgs // packageJobs
+      then packageJobs
-      else mapTestOn ((packagePlatforms pkgs) // packageJobs);
+      else mapTestOn packageJobs;
   in
     unionOfDisjoint nonPackageJobs mapTestOn-packages;