Merge pull request #228759 from Artturin/splitfactoroutmeta

    # -----

    else { valid = "yes"; });

  # The meta attribute is passed in the resulting attribute set,

  # but it's not part of the actual derivation, i.e., it's not

  # passed to the builder and is not a dependency.  But since we

  # include it in the result, it *is* available to nix-env for queries.

  # Example:

  #   meta = checkMeta.commonMeta { inherit validity attrs pos references; };

  #   validity = checkMeta.assertValidity { inherit meta attrs; };

  commonMeta = { validity, attrs, pos ? null, references ? [ ] }:

    let

      outputs = attrs.outputs or [ "out" ];

    in

    {

      # `name` derivation attribute includes cross-compilation cruft,

      # is under assert, and is sanitized.

      # Let's have a clean always accessible version here.

      name = attrs.name or "${attrs.pname}-${attrs.version}";

      # If the packager hasn't specified `outputsToInstall`, choose a default,

      # which is the name of `p.bin or p.out or p` along with `p.man` when

      # present.

      #

      # If the packager has specified it, it will be overridden below in

      # `// meta`.

      #

      #   Note: This default probably shouldn't be globally configurable.

      #   Services and users should specify outputs explicitly,

      #   unless they are comfortable with this default.

      outputsToInstall =

        let

          hasOutput = out: builtins.elem out outputs;

        in

        [ (lib.findFirst hasOutput null ([ "bin" "out" ] ++ outputs)) ]

        ++ lib.optional (hasOutput "man") "man";

    }

    // attrs.meta or { }

    # Fill `meta.position` to identify the source location of the package.

    // lib.optionalAttrs (pos != null) {

      position = pos.file + ":" + toString pos.line;

    } // {

      # Expose the result of the checks for everyone to see.

      inherit (validity) unfree broken unsupported insecure;

      available = validity.valid != "no"

      && (if config.checkMetaRecursively or false

      then lib.all (d: d.meta.available or true) references

      else true);

    };

  assertValidity = { meta, attrs }: let

      validity = checkValidity attrs;

    in validity // {

          warn = handleEvalWarning { inherit meta attrs; } { inherit (validity) reason errormsg; };

          yes = true;

        }.${validity.valid};

  };

in assertValidity

in { inherit assertValidity commonMeta; }

        lib.mapNullable unsafeDerivationToUntrackedOutpath attrs.allowedRequisites;

    };

  validity = checkMeta { inherit meta attrs; };

  # The meta attribute is passed in the resulting attribute set,

  # but it's not part of the actual derivation, i.e., it's not

  # passed to the builder and is not a dependency.  But since we

  # include it in the result, it *is* available to nix-env for queries.

  meta = {

      # `name` above includes cross-compilation cruft,

      # is under assert, and is sanitized.

      # Let's have a clean always accessible version here.

      name = attrs.name or "${attrs.pname}-${attrs.version}";

      # If the packager hasn't specified `outputsToInstall`, choose a default,

      # which is the name of `p.bin or p.out or p` along with `p.man` when

      # present.

      #

      # If the packager has specified it, it will be overridden below in

      # `// meta`.

      #

      #   Note: This default probably shouldn't be globally configurable.

      #   Services and users should specify outputs explicitly,

      #   unless they are comfortable with this default.

      outputsToInstall =

        let

          hasOutput = out: builtins.elem out outputs;

        in [( lib.findFirst hasOutput null (["bin" "out"] ++ outputs) )]

          ++ lib.optional (hasOutput "man") "man";

    }

    // attrs.meta or {}

    # Fill `meta.position` to identify the source location of the package.

    // lib.optionalAttrs (pos != null) {

      position = pos.file + ":" + toString pos.line;

    } // {

      # Expose the result of the checks for everyone to see.

      inherit (validity) unfree broken unsupported insecure;

      available = validity.valid != "no"

               && (if config.checkMetaRecursively or false

                   then lib.all (d: d.meta.available or true) references

                   else true);

    };

  meta = checkMeta.commonMeta { inherit validity attrs pos references; };

  validity = checkMeta.assertValidity { inherit meta attrs; };

  checkedEnv =

    let

       disallowedRequisites = [ ];

     });

     inherit meta passthru overrideAttrs;

     inherit passthru overrideAttrs;

     inherit meta;

   } //

   # Pass through extra attributes that are not inputs, but

   # should be made available to Nix expressions using the