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types: suggest how to resolve the conflict

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This commit is contained in:
Domen Kožar 2023-02-09 07:38:40 +00:00
parent b3cc29c288
commit fe734efc9c
1 changed files with 5 additions and 2 deletions
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7
lib/options.nix
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@ -36,6 +36,9 @@ let
inherit (lib.types)
mkOptionType
;
prioritySuggestion = ''
Use `lib.mkForce value` or `lib.mkDefault value` to change the priority on any of these definitions.
'';
in
rec {
@ -184,7 +187,7 @@ rec {
if length defs == 1
then (head defs).value
else assert length defs > 1;
throw "The option `${showOption loc}' is defined multiple times while it's expected to be unique.\n${message}\nDefinition values:${showDefs defs}";
throw "The option `${showOption loc}' is defined multiple times while it's expected to be unique.\n${message}\nDefinition values:${showDefs defs}\n${prioritySuggestion}";
/* "Merge" option definitions by checking that they all have the same value. */
mergeEqualOption = loc: defs:
@ -195,7 +198,7 @@ rec {
else if length defs == 1 then (head defs).value
else (foldl' (first: def:
if def.value != first.value then
throw "The option `${showOption loc}' has conflicting definition values:${showDefs [ first def ]}"
throw "The option `${showOption loc}' has conflicting definition values:${showDefs [ first def ]}\n${prioritySuggestion}"
else
first) (head defs) (tail defs)).value;