mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-12-15 00:54:46 +00:00
370efefd8c
The error message is already helpfully verbose, so there's little reason to shorten the informational URL.
631 lines
24 KiB
Nix
631 lines
24 KiB
Nix
# Definitions related to run-time type checking. Used in particular
|
||
# to type-check NixOS configurations.
|
||
{ lib }:
|
||
with lib.lists;
|
||
with lib.attrsets;
|
||
with lib.options;
|
||
with lib.trivial;
|
||
with lib.strings;
|
||
let
|
||
|
||
inherit (lib.modules) mergeDefinitions;
|
||
outer_types =
|
||
rec {
|
||
isType = type: x: (x._type or "") == type;
|
||
|
||
setType = typeName: value: value // {
|
||
_type = typeName;
|
||
};
|
||
|
||
|
||
# Default type merging function
|
||
# takes two type functors and return the merged type
|
||
defaultTypeMerge = f: f':
|
||
let wrapped = f.wrapped.typeMerge f'.wrapped.functor;
|
||
payload = f.binOp f.payload f'.payload;
|
||
in
|
||
# cannot merge different types
|
||
if f.name != f'.name
|
||
then null
|
||
# simple types
|
||
else if (f.wrapped == null && f'.wrapped == null)
|
||
&& (f.payload == null && f'.payload == null)
|
||
then f.type
|
||
# composed types
|
||
else if (f.wrapped != null && f'.wrapped != null) && (wrapped != null)
|
||
then f.type wrapped
|
||
# value types
|
||
else if (f.payload != null && f'.payload != null) && (payload != null)
|
||
then f.type payload
|
||
else null;
|
||
|
||
# Default type functor
|
||
defaultFunctor = name: {
|
||
inherit name;
|
||
type = types.${name} or null;
|
||
wrapped = null;
|
||
payload = null;
|
||
binOp = a: b: null;
|
||
};
|
||
|
||
isOptionType = isType "option-type";
|
||
mkOptionType =
|
||
{ # Human-readable representation of the type, should be equivalent to
|
||
# the type function name.
|
||
name
|
||
, # Description of the type, defined recursively by embedding the wrapped type if any.
|
||
description ? null
|
||
, # Function applied to each definition that should return true if
|
||
# its type-correct, false otherwise.
|
||
check ? (x: true)
|
||
, # Merge a list of definitions together into a single value.
|
||
# This function is called with two arguments: the location of
|
||
# the option in the configuration as a list of strings
|
||
# (e.g. ["boot" "loader "grub" "enable"]), and a list of
|
||
# definition values and locations (e.g. [ { file = "/foo.nix";
|
||
# value = 1; } { file = "/bar.nix"; value = 2 } ]).
|
||
merge ? mergeDefaultOption
|
||
, # Whether this type has a value representing nothingness. If it does,
|
||
# this should be a value of the form { value = <the nothing value>; }
|
||
# If it doesn't, this should be {}
|
||
# This may be used when a value is required for `mkIf false`. This allows the extra laziness in e.g. `lazyAttrsOf`.
|
||
emptyValue ? {}
|
||
, # Return a flat list of sub-options. Used to generate
|
||
# documentation.
|
||
getSubOptions ? prefix: {}
|
||
, # List of modules if any, or null if none.
|
||
getSubModules ? null
|
||
, # Function for building the same option type with a different list of
|
||
# modules.
|
||
substSubModules ? m: null
|
||
, # Function that merge type declarations.
|
||
# internal, takes a functor as argument and returns the merged type.
|
||
# returning null means the type is not mergeable
|
||
typeMerge ? defaultTypeMerge functor
|
||
, # The type functor.
|
||
# internal, representation of the type as an attribute set.
|
||
# name: name of the type
|
||
# type: type function.
|
||
# wrapped: the type wrapped in case of compound types.
|
||
# payload: values of the type, two payloads of the same type must be
|
||
# combinable with the binOp binary operation.
|
||
# binOp: binary operation that merge two payloads of the same type.
|
||
functor ? defaultFunctor name
|
||
}:
|
||
{ _type = "option-type";
|
||
inherit name check merge emptyValue getSubOptions getSubModules substSubModules typeMerge functor;
|
||
description = if description == null then name else description;
|
||
};
|
||
|
||
|
||
# When adding new types don't forget to document them in
|
||
# nixos/doc/manual/development/option-types.xml!
|
||
types = rec {
|
||
unspecified = mkOptionType {
|
||
name = "unspecified";
|
||
};
|
||
|
||
bool = mkOptionType {
|
||
name = "bool";
|
||
description = "boolean";
|
||
check = isBool;
|
||
merge = mergeEqualOption;
|
||
};
|
||
|
||
int = mkOptionType {
|
||
name = "int";
|
||
description = "signed integer";
|
||
check = isInt;
|
||
merge = mergeEqualOption;
|
||
};
|
||
|
||
# Specialized subdomains of int
|
||
ints =
|
||
let
|
||
betweenDesc = lowest: highest:
|
||
"${toString lowest} and ${toString highest} (both inclusive)";
|
||
between = lowest: highest:
|
||
assert lib.assertMsg (lowest <= highest)
|
||
"ints.between: lowest must be smaller than highest";
|
||
addCheck int (x: x >= lowest && x <= highest) // {
|
||
name = "intBetween";
|
||
description = "integer between ${betweenDesc lowest highest}";
|
||
};
|
||
ign = lowest: highest: name: docStart:
|
||
between lowest highest // {
|
||
inherit name;
|
||
description = docStart + "; between ${betweenDesc lowest highest}";
|
||
};
|
||
unsign = bit: range: ign 0 (range - 1)
|
||
"unsignedInt${toString bit}" "${toString bit} bit unsigned integer";
|
||
sign = bit: range: ign (0 - (range / 2)) (range / 2 - 1)
|
||
"signedInt${toString bit}" "${toString bit} bit signed integer";
|
||
|
||
in {
|
||
/* An int with a fixed range.
|
||
*
|
||
* Example:
|
||
* (ints.between 0 100).check (-1)
|
||
* => false
|
||
* (ints.between 0 100).check (101)
|
||
* => false
|
||
* (ints.between 0 0).check 0
|
||
* => true
|
||
*/
|
||
inherit between;
|
||
|
||
unsigned = addCheck types.int (x: x >= 0) // {
|
||
name = "unsignedInt";
|
||
description = "unsigned integer, meaning >=0";
|
||
};
|
||
positive = addCheck types.int (x: x > 0) // {
|
||
name = "positiveInt";
|
||
description = "positive integer, meaning >0";
|
||
};
|
||
u8 = unsign 8 256;
|
||
u16 = unsign 16 65536;
|
||
# the biggest int a 64-bit Nix accepts is 2^63 - 1 (9223372036854775808), for a 32-bit Nix it is 2^31 - 1 (2147483647)
|
||
# the smallest int a 64-bit Nix accepts is -2^63 (-9223372036854775807), for a 32-bit Nix it is -2^31 (-2147483648)
|
||
# u32 = unsign 32 4294967296;
|
||
# u64 = unsign 64 18446744073709551616;
|
||
|
||
s8 = sign 8 256;
|
||
s16 = sign 16 65536;
|
||
# s32 = sign 32 4294967296;
|
||
};
|
||
|
||
# Alias of u16 for a port number
|
||
port = ints.u16;
|
||
|
||
float = mkOptionType {
|
||
name = "float";
|
||
description = "floating point number";
|
||
check = isFloat;
|
||
merge = mergeEqualOption;
|
||
};
|
||
|
||
str = mkOptionType {
|
||
name = "str";
|
||
description = "string";
|
||
check = isString;
|
||
merge = mergeEqualOption;
|
||
};
|
||
|
||
strMatching = pattern: mkOptionType {
|
||
name = "strMatching ${escapeNixString pattern}";
|
||
description = "string matching the pattern ${pattern}";
|
||
check = x: str.check x && builtins.match pattern x != null;
|
||
inherit (str) merge;
|
||
};
|
||
|
||
# Merge multiple definitions by concatenating them (with the given
|
||
# separator between the values).
|
||
separatedString = sep: mkOptionType rec {
|
||
name = "separatedString";
|
||
description = if sep == ""
|
||
then "Concatenated string" # for types.string.
|
||
else "strings concatenated with ${builtins.toJSON sep}"
|
||
;
|
||
check = isString;
|
||
merge = loc: defs: concatStringsSep sep (getValues defs);
|
||
functor = (defaultFunctor name) // {
|
||
payload = sep;
|
||
binOp = sepLhs: sepRhs:
|
||
if sepLhs == sepRhs then sepLhs
|
||
else null;
|
||
};
|
||
};
|
||
|
||
lines = separatedString "\n";
|
||
commas = separatedString ",";
|
||
envVar = separatedString ":";
|
||
|
||
# Deprecated; should not be used because it quietly concatenates
|
||
# strings, which is usually not what you want.
|
||
string = warn "types.string is deprecated because it quietly concatenates strings"
|
||
(separatedString "");
|
||
|
||
attrs = mkOptionType {
|
||
name = "attrs";
|
||
description = "attribute set";
|
||
check = isAttrs;
|
||
merge = loc: foldl' (res: def: mergeAttrs res def.value) {};
|
||
emptyValue = { value = {}; };
|
||
};
|
||
|
||
# derivation is a reserved keyword.
|
||
package = mkOptionType {
|
||
name = "package";
|
||
check = x: isDerivation x || isStorePath x;
|
||
merge = loc: defs:
|
||
let res = mergeOneOption loc defs;
|
||
in if isDerivation res then res else toDerivation res;
|
||
};
|
||
|
||
shellPackage = package // {
|
||
check = x: (package.check x) && (hasAttr "shellPath" x);
|
||
};
|
||
|
||
path = mkOptionType {
|
||
name = "path";
|
||
check = x: isCoercibleToString x && builtins.substring 0 1 (toString x) == "/";
|
||
merge = mergeEqualOption;
|
||
};
|
||
|
||
# drop this in the future:
|
||
list = builtins.trace "`types.list` is deprecated; use `types.listOf` instead" types.listOf;
|
||
|
||
listOf = elemType: mkOptionType rec {
|
||
name = "listOf";
|
||
description = "list of ${elemType.description}s";
|
||
check = isList;
|
||
merge = loc: defs:
|
||
map (x: x.value) (filter (x: x ? value) (concatLists (imap1 (n: def:
|
||
if isList def.value then
|
||
imap1 (m: def':
|
||
(mergeDefinitions
|
||
(loc ++ ["[definition ${toString n}-entry ${toString m}]"])
|
||
elemType
|
||
[{ inherit (def) file; value = def'; }]
|
||
).optionalValue
|
||
) def.value
|
||
else
|
||
throw "The option value `${showOption loc}` in `${def.file}` is not a list.") defs)));
|
||
emptyValue = { value = {}; };
|
||
getSubOptions = prefix: elemType.getSubOptions (prefix ++ ["*"]);
|
||
getSubModules = elemType.getSubModules;
|
||
substSubModules = m: listOf (elemType.substSubModules m);
|
||
functor = (defaultFunctor name) // { wrapped = elemType; };
|
||
};
|
||
|
||
nonEmptyListOf = elemType:
|
||
let list = addCheck (types.listOf elemType) (l: l != []);
|
||
in list // {
|
||
description = "non-empty " + list.description;
|
||
# Note: emptyValue is left as is, because another module may define an element.
|
||
};
|
||
|
||
attrsOf = elemType: mkOptionType rec {
|
||
name = "attrsOf";
|
||
description = "attribute set of ${elemType.description}s";
|
||
check = isAttrs;
|
||
merge = loc: defs:
|
||
mapAttrs (n: v: v.value) (filterAttrs (n: v: v ? value) (zipAttrsWith (name: defs:
|
||
(mergeDefinitions (loc ++ [name]) elemType defs).optionalValue
|
||
)
|
||
# Push down position info.
|
||
(map (def: mapAttrs (n: v: { inherit (def) file; value = v; }) def.value) defs)));
|
||
emptyValue = { value = {}; };
|
||
getSubOptions = prefix: elemType.getSubOptions (prefix ++ ["<name>"]);
|
||
getSubModules = elemType.getSubModules;
|
||
substSubModules = m: attrsOf (elemType.substSubModules m);
|
||
functor = (defaultFunctor name) // { wrapped = elemType; };
|
||
};
|
||
|
||
# A version of attrsOf that's lazy in its values at the expense of
|
||
# conditional definitions not working properly. E.g. defining a value with
|
||
# `foo.attr = mkIf false 10`, then `foo ? attr == true`, whereas with
|
||
# attrsOf it would correctly be `false`. Accessing `foo.attr` would throw an
|
||
# error that it's not defined. Use only if conditional definitions don't make sense.
|
||
lazyAttrsOf = elemType: mkOptionType rec {
|
||
name = "lazyAttrsOf";
|
||
description = "lazy attribute set of ${elemType.description}s";
|
||
check = isAttrs;
|
||
merge = loc: defs:
|
||
zipAttrsWith (name: defs:
|
||
let merged = mergeDefinitions (loc ++ [name]) elemType defs;
|
||
# mergedValue will trigger an appropriate error when accessed
|
||
in merged.optionalValue.value or elemType.emptyValue.value or merged.mergedValue
|
||
)
|
||
# Push down position info.
|
||
(map (def: mapAttrs (n: v: { inherit (def) file; value = v; }) def.value) defs);
|
||
emptyValue = { value = {}; };
|
||
getSubOptions = prefix: elemType.getSubOptions (prefix ++ ["<name>"]);
|
||
getSubModules = elemType.getSubModules;
|
||
substSubModules = m: lazyAttrsOf (elemType.substSubModules m);
|
||
functor = (defaultFunctor name) // { wrapped = elemType; };
|
||
};
|
||
|
||
# List or attribute set of ...
|
||
loaOf = elemType:
|
||
let
|
||
convertAllLists = loc: defs:
|
||
let
|
||
padWidth = stringLength (toString (length defs));
|
||
unnamedPrefix = i: "unnamed-" + fixedWidthNumber padWidth i + ".";
|
||
in
|
||
imap1 (i: convertIfList loc (unnamedPrefix i)) defs;
|
||
convertIfList = loc: unnamedPrefix: def:
|
||
if isList def.value then
|
||
let
|
||
padWidth = stringLength (toString (length def.value));
|
||
unnamed = i: unnamedPrefix + fixedWidthNumber padWidth i;
|
||
anyString = placeholder "name";
|
||
nameAttrs = [
|
||
{ path = [ "environment" "etc" ];
|
||
name = "target";
|
||
}
|
||
{ path = [ "containers" anyString "bindMounts" ];
|
||
name = "mountPoint";
|
||
}
|
||
{ path = [ "programs" "ssh" "knownHosts" ];
|
||
# hostNames is actually a list so we would need to handle it only when singleton
|
||
name = "hostNames";
|
||
}
|
||
{ path = [ "fileSystems" ];
|
||
name = "mountPoint";
|
||
}
|
||
{ path = [ "boot" "specialFileSystems" ];
|
||
name = "mountPoint";
|
||
}
|
||
{ path = [ "services" "znapzend" "zetup" ];
|
||
name = "dataset";
|
||
}
|
||
{ path = [ "services" "znapzend" "zetup" anyString "destinations" ];
|
||
name = "label";
|
||
}
|
||
{ path = [ "services" "geoclue2" "appConfig" ];
|
||
name = "desktopID";
|
||
}
|
||
];
|
||
matched = let
|
||
equals = a: b: b == anyString || a == b;
|
||
fallback = { name = "name"; };
|
||
in findFirst ({ path, ... }: all (v: v == true) (zipListsWith equals loc path)) fallback nameAttrs;
|
||
nameAttr = matched.name;
|
||
nameValueOld = value:
|
||
if isList value then
|
||
if length value > 0 then
|
||
"[ " + concatMapStringsSep " " escapeNixString value + " ]"
|
||
else
|
||
"[ ]"
|
||
else
|
||
escapeNixString value;
|
||
nameValueNew = value: unnamed:
|
||
if isList value then
|
||
if length value > 0 then
|
||
head value
|
||
else
|
||
unnamed
|
||
else
|
||
value;
|
||
res =
|
||
{ inherit (def) file;
|
||
value = listToAttrs (
|
||
imap1 (elemIdx: elem:
|
||
{ name = nameValueNew (elem.${nameAttr} or (unnamed elemIdx)) (unnamed elemIdx);
|
||
value = elem;
|
||
}) def.value);
|
||
};
|
||
option = concatStringsSep "." loc;
|
||
sample = take 3 def.value;
|
||
more = lib.optionalString (length def.value > 3) "... ";
|
||
list = concatMapStrings (x: ''{ ${nameAttr} = ${nameValueOld (x.${nameAttr} or "unnamed")}; ...} '') sample;
|
||
set = concatMapStrings (x: ''${nameValueNew (x.${nameAttr} or "unnamed") "unnamed"} = {...}; '') sample;
|
||
msg = ''
|
||
In file ${def.file}
|
||
a list is being assigned to the option config.${option}.
|
||
This will soon be an error as type loaOf is deprecated.
|
||
See https://github.com/NixOS/nixpkgs/pull/63103 for more information.
|
||
Do
|
||
${option} =
|
||
{ ${set}${more}}
|
||
instead of
|
||
${option} =
|
||
[ ${list}${more}]
|
||
'';
|
||
in
|
||
lib.warn msg res
|
||
else
|
||
def;
|
||
attrOnly = attrsOf elemType;
|
||
in mkOptionType rec {
|
||
name = "loaOf";
|
||
description = "list or attribute set of ${elemType.description}s";
|
||
check = x: isList x || isAttrs x;
|
||
merge = loc: defs: attrOnly.merge loc (convertAllLists loc defs);
|
||
emptyValue = { value = {}; };
|
||
getSubOptions = prefix: elemType.getSubOptions (prefix ++ ["<name?>"]);
|
||
getSubModules = elemType.getSubModules;
|
||
substSubModules = m: loaOf (elemType.substSubModules m);
|
||
functor = (defaultFunctor name) // { wrapped = elemType; };
|
||
};
|
||
|
||
# Value of given type but with no merging (i.e. `uniq list`s are not concatenated).
|
||
uniq = elemType: mkOptionType rec {
|
||
name = "uniq";
|
||
inherit (elemType) description check;
|
||
merge = mergeOneOption;
|
||
emptyValue = elemType.emptyValue;
|
||
getSubOptions = elemType.getSubOptions;
|
||
getSubModules = elemType.getSubModules;
|
||
substSubModules = m: uniq (elemType.substSubModules m);
|
||
functor = (defaultFunctor name) // { wrapped = elemType; };
|
||
};
|
||
|
||
# Null or value of ...
|
||
nullOr = elemType: mkOptionType rec {
|
||
name = "nullOr";
|
||
description = "null or ${elemType.description}";
|
||
check = x: x == null || elemType.check x;
|
||
merge = loc: defs:
|
||
let nrNulls = count (def: def.value == null) defs; in
|
||
if nrNulls == length defs then null
|
||
else if nrNulls != 0 then
|
||
throw "The option `${showOption loc}` is defined both null and not null, in ${showFiles (getFiles defs)}."
|
||
else elemType.merge loc defs;
|
||
emptyValue = { value = null; };
|
||
getSubOptions = elemType.getSubOptions;
|
||
getSubModules = elemType.getSubModules;
|
||
substSubModules = m: nullOr (elemType.substSubModules m);
|
||
functor = (defaultFunctor name) // { wrapped = elemType; };
|
||
};
|
||
|
||
# A submodule (like typed attribute set). See NixOS manual.
|
||
submodule = modules: submoduleWith {
|
||
shorthandOnlyDefinesConfig = true;
|
||
modules = toList modules;
|
||
};
|
||
|
||
submoduleWith =
|
||
{ modules
|
||
, specialArgs ? {}
|
||
, shorthandOnlyDefinesConfig ? false
|
||
}@attrs:
|
||
let
|
||
inherit (lib.modules) evalModules;
|
||
|
||
coerce = unify: value: if isFunction value
|
||
then setFunctionArgs (args: unify (value args)) (functionArgs value)
|
||
else unify (if shorthandOnlyDefinesConfig then { config = value; } else value);
|
||
|
||
allModules = defs: modules ++ imap1 (n: { value, file }:
|
||
if isAttrs value || isFunction value then
|
||
# Annotate the value with the location of its definition for better error messages
|
||
coerce (lib.modules.unifyModuleSyntax file "${toString file}-${toString n}") value
|
||
else value
|
||
) defs;
|
||
|
||
in
|
||
mkOptionType rec {
|
||
name = "submodule";
|
||
check = x: isAttrs x || isFunction x || path.check x;
|
||
merge = loc: defs:
|
||
(evalModules {
|
||
modules = allModules defs;
|
||
inherit specialArgs;
|
||
args.name = last loc;
|
||
prefix = loc;
|
||
}).config;
|
||
emptyValue = { value = {}; };
|
||
getSubOptions = prefix: (evalModules
|
||
{ inherit modules prefix specialArgs;
|
||
# This is a work-around due to the fact that some sub-modules,
|
||
# such as the one included in an attribute set, expects a "args"
|
||
# attribute to be given to the sub-module. As the option
|
||
# evaluation does not have any specific attribute name, we
|
||
# provide a default one for the documentation.
|
||
#
|
||
# This is mandatory as some option declaration might use the
|
||
# "name" attribute given as argument of the submodule and use it
|
||
# as the default of option declarations.
|
||
#
|
||
# Using lookalike unicode single angle quotation marks because
|
||
# of the docbook transformation the options receive. In all uses
|
||
# > and < wouldn't be encoded correctly so the encoded values
|
||
# would be used, and use of `<` and `>` would break the XML document.
|
||
# It shouldn't cause an issue since this is cosmetic for the manual.
|
||
args.name = "‹name›";
|
||
}).options;
|
||
getSubModules = modules;
|
||
substSubModules = m: submoduleWith (attrs // {
|
||
modules = m;
|
||
});
|
||
functor = defaultFunctor name // {
|
||
type = types.submoduleWith;
|
||
payload = {
|
||
modules = modules;
|
||
specialArgs = specialArgs;
|
||
shorthandOnlyDefinesConfig = shorthandOnlyDefinesConfig;
|
||
};
|
||
binOp = lhs: rhs: {
|
||
modules = lhs.modules ++ rhs.modules;
|
||
specialArgs =
|
||
let intersecting = builtins.intersectAttrs lhs.specialArgs rhs.specialArgs;
|
||
in if intersecting == {}
|
||
then lhs.specialArgs // rhs.specialArgs
|
||
else throw "A submoduleWith option is declared multiple times with the same specialArgs \"${toString (attrNames intersecting)}\"";
|
||
shorthandOnlyDefinesConfig =
|
||
if lhs.shorthandOnlyDefinesConfig == rhs.shorthandOnlyDefinesConfig
|
||
then lhs.shorthandOnlyDefinesConfig
|
||
else throw "A submoduleWith option is declared multiple times with conflicting shorthandOnlyDefinesConfig values";
|
||
};
|
||
};
|
||
};
|
||
|
||
# A value from a set of allowed ones.
|
||
enum = values:
|
||
let
|
||
show = v:
|
||
if builtins.isString v then ''"${v}"''
|
||
else if builtins.isInt v then builtins.toString v
|
||
else ''<${builtins.typeOf v}>'';
|
||
in
|
||
mkOptionType rec {
|
||
name = "enum";
|
||
description = "one of ${concatMapStringsSep ", " show values}";
|
||
check = flip elem values;
|
||
merge = mergeEqualOption;
|
||
functor = (defaultFunctor name) // { payload = values; binOp = a: b: unique (a ++ b); };
|
||
};
|
||
|
||
# Either value of type `t1` or `t2`.
|
||
either = t1: t2: mkOptionType rec {
|
||
name = "either";
|
||
description = "${t1.description} or ${t2.description}";
|
||
check = x: t1.check x || t2.check x;
|
||
merge = loc: defs:
|
||
let
|
||
defList = map (d: d.value) defs;
|
||
in
|
||
if all (x: t1.check x) defList
|
||
then t1.merge loc defs
|
||
else if all (x: t2.check x) defList
|
||
then t2.merge loc defs
|
||
else mergeOneOption loc defs;
|
||
typeMerge = f':
|
||
let mt1 = t1.typeMerge (elemAt f'.wrapped 0).functor;
|
||
mt2 = t2.typeMerge (elemAt f'.wrapped 1).functor;
|
||
in
|
||
if (name == f'.name) && (mt1 != null) && (mt2 != null)
|
||
then functor.type mt1 mt2
|
||
else null;
|
||
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 `coercedType` or `finalType`, the former is
|
||
# converted to `finalType` using `coerceFunc`.
|
||
coercedTo = coercedType: coerceFunc: finalType:
|
||
assert lib.assertMsg (coercedType.getSubModules == null)
|
||
"coercedTo: coercedType must not have submodules (it’s a ${
|
||
coercedType.description})";
|
||
mkOptionType rec {
|
||
name = "coercedTo";
|
||
description = "${finalType.description} or ${coercedType.description} convertible to it";
|
||
check = x: (coercedType.check x && finalType.check (coerceFunc x)) || finalType.check x;
|
||
merge = loc: defs:
|
||
let
|
||
coerceVal = val:
|
||
if coercedType.check val then coerceFunc val
|
||
else val;
|
||
in finalType.merge loc (map (def: def // { value = coerceVal def.value; }) defs);
|
||
emptyValue = finalType.emptyValue;
|
||
getSubOptions = finalType.getSubOptions;
|
||
getSubModules = finalType.getSubModules;
|
||
substSubModules = m: coercedTo coercedType coerceFunc (finalType.substSubModules m);
|
||
typeMerge = t1: t2: null;
|
||
functor = (defaultFunctor name) // { wrapped = finalType; };
|
||
};
|
||
|
||
# Obsolete alternative to configOf. It takes its option
|
||
# declarations from the ‘options’ attribute of containing option
|
||
# declaration.
|
||
optionSet = mkOptionType {
|
||
name = builtins.trace "types.optionSet is deprecated; use types.submodule instead" "optionSet";
|
||
description = "option set";
|
||
};
|
||
# Augment the given type with an additional type check function.
|
||
addCheck = elemType: check: elemType // { check = x: elemType.check x && check x; };
|
||
|
||
};
|
||
};
|
||
|
||
in outer_types // outer_types.types
|