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lib/types: Add oneOf, extension of either to a list of types

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This commit is contained in:
Silvan Mosberger 2019-08-01 15:55:33 +02:00
parent c6e7bc2977
commit 9a44f44d4c
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5 changed files with 42 additions and 0 deletions
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9
lib/tests/modules.sh
View File

@ -71,6 +71,15 @@ checkConfigError 'The option value .* in .* is not of type.*positive integer.*'
checkConfigOutput "42" config.value ./declare-int-between-value.nix ./define-value-int-positive.nix
checkConfigError 'The option value .* in .* is not of type.*between.*-21 and 43.*inclusive.*' config.value ./declare-int-between-value.nix ./define-value-int-negative.nix
# Check either types
# types.either
checkConfigOutput "42" config.value ./declare-either.nix ./define-value-int-positive.nix
checkConfigOutput "\"24\"" config.value ./declare-either.nix ./define-value-string.nix
# types.oneOf
checkConfigOutput "42" config.value ./declare-oneOf.nix ./define-value-int-positive.nix
checkConfigOutput "[ ]" config.value ./declare-oneOf.nix ./define-value-list.nix
checkConfigOutput "\"24\"" config.value ./declare-oneOf.nix ./define-value-string.nix
# Check mkForce without submodules.
set -- config.enable ./declare-enable.nix ./define-enable.nix
checkConfigOutput "true" "$@"

5
lib/tests/modules/declare-either.nix Normal file
View File

@ -0,0 +1,5 @@
{ lib, ... }: {
options.value = lib.mkOption {
type = lib.types.either lib.types.int lib.types.str;
};
}

9
lib/tests/modules/declare-oneOf.nix Normal file
View File

@ -0,0 +1,9 @@
{ lib, ... }: {
options.value = lib.mkOption {
type = lib.types.oneOf [
lib.types.int
(lib.types.listOf lib.types.int)
lib.types.str
];
};
}

7
lib/types.nix
View File

@ -443,6 +443,13 @@ rec {
functor = (defaultFunctor name) // { wrapped = [ t1 t2 ]; };
};
# Any of the types in the given list
oneOf = ts:
let
head' = if ts == [] then throw "types.oneOf needs to get at least one type in its argument" else head ts;
tail' = tail ts;
in foldl' either head' tail';
# Either value of type `finalType` or `coercedType`, the latter is
# converted to `finalType` using `coerceFunc`.
coercedTo = coercedType: coerceFunc: finalType:

12
nixos/doc/manual/development/option-types.xml
View File

@ -346,6 +346,18 @@
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<varname>types.oneOf</varname> [ <replaceable>t1</replaceable> <replaceable>t2</replaceable> ... ]
</term>
<listitem>
<para>
Type <replaceable>t1</replaceable> or type <replaceable>t2</replaceable> and so forth,
e.g. <literal>with types; oneOf [ int str bool ]</literal>. Multiple definitions
cannot be merged.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<varname>types.coercedTo</varname> <replaceable>from</replaceable> <replaceable>f</replaceable> <replaceable>to</replaceable>