pyrox.dev
Merge pull request #32547 from obsidiansystems/fix-splice
top-level: Fix splicing, again
authored by John Ericson and committed by GitHub 3337e9ec 410ae8ab
+9
-10
pkgs/top-level/splice.nix
+9
-10
pkgs/top-level/splice.nix
···
37
inherit name;
38
value = let
39
defaultValue = mash.${name};
40
-
buildValue = buildPkgs.${name};
41
-
runValue = runPkgs.${name};
42
augmentedValue = defaultValue
43
// (lib.optionalAttrs (buildPkgs ? ${name}) { nativeDrv = buildValue; })
44
// (lib.optionalAttrs (runPkgs ? ${name}) { crossDrv = runValue; });
45
-
# Get the set of outputs of a derivation
46
tryGetOutputs = value0: let
47
-
eval = builtins.tryEval value0;
48
-
in getOutputs (if eval.success then eval.value else {});
49
getOutputs = value: lib.genAttrs
50
(value.outputs or (lib.optional (value ? out) "out"))
51
(output: value.${output});
52
in
53
-
# Certain *Cross derivations will fail assertions, but we need their
54
-
# nativeDrv. We are assuming anything that fails to evaluate is an
55
-
# attrset (including derivation) and thus can be unioned.
56
-
if !(builtins.tryEval defaultValue).success then augmentedValue
57
# The derivation along with its outputs, which we recur
58
# on to splice them together.
59
-
else if lib.isDerivation defaultValue then augmentedValue
60
// splicer (tryGetOutputs buildValue) (getOutputs runValue)
61
# Just recur on plain attrsets
62
else if lib.isAttrs defaultValue then splicer buildValue runValue
···
37
inherit name;
38
value = let
39
defaultValue = mash.${name};
40
+
# `or {}` is for the non-derivation attsert splicing case, where `{}` is the identity.
41
+
buildValue = buildPkgs.${name} or {};
42
+
runValue = runPkgs.${name} or {};
43
augmentedValue = defaultValue
44
// (lib.optionalAttrs (buildPkgs ? ${name}) { nativeDrv = buildValue; })
45
// (lib.optionalAttrs (runPkgs ? ${name}) { crossDrv = runValue; });
46
+
# Get the set of outputs of a derivation. If one derivation fails to
47
+
# evaluate we don't want to diverge the entire splice, so we fall back
48
+
# on {}
49
tryGetOutputs = value0: let
50
+
inherit (builtins.tryEval value0) success value;
51
+
in getOutputs (lib.optionalAttrs success value);
52
getOutputs = value: lib.genAttrs
53
(value.outputs or (lib.optional (value ? out) "out"))
54
(output: value.${output});
55
in
56
# The derivation along with its outputs, which we recur
57
# on to splice them together.
58
+
if lib.isDerivation defaultValue then augmentedValue
59
// splicer (tryGetOutputs buildValue) (getOutputs runValue)
60
# Just recur on plain attrsets
61
else if lib.isAttrs defaultValue then splicer buildValue runValue