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lib.types: Add unique like uniq, but custom errors

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Couldn't extend types.uniq and it had a silly name anyway.
Now we can have better error messages.
This commit is contained in:
Robert Hensing 2022-01-24 01:07:32 +01:00
parent ccb85a53b6
commit ba3e91ed43
3 changed files with 23 additions and 3 deletions
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15
lib/types.nix
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@ -32,7 +32,6 @@ let
last
length
tail
unique
;
inherit (lib.attrsets)
attrNames
@ -48,6 +47,7 @@ let
mergeDefaultOption
mergeEqualOption
mergeOneOption
mergeUniqueOption
showFiles
showOption
;
@ -470,6 +470,18 @@ rec {
nestedTypes.elemType = elemType;
};
unique = { message }: type: mkOptionType rec {
name = "unique";
inherit (type) description check;
merge = mergeUniqueOption { inherit message; };
emptyValue = type.emptyValue;
getSubOptions = type.getSubOptions;
getSubModules = type.getSubModules;
substSubModules = m: uniq (type.substSubModules m);
functor = (defaultFunctor name) // { wrapped = type; };
nestedTypes.elemType = type;
};
# Null or value of ...
nullOr = elemType: mkOptionType rec {
name = "nullOr";
@ -599,6 +611,7 @@ rec {
# A value from a set of allowed ones.
enum = values:
let
inherit (lib.lists) unique;
show = v:
if builtins.isString v then ''"${v}"''
else if builtins.isInt v then builtins.toString v