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{ lib }:
rec {
inherit (builtins) readDir;
inherit (lib) filterAttrs hasSuffix removeSuffix mapAttrs' nameValuePair isFunction functionArgs setFunctionArgs id;
mapFilterAttrs = seive: f: attrs: filterAttrs seive (mapAttrs' f attrs);
nixImport = { dir, _import ? name: _base: import "${toString dir}/${name}" }:
mapFilterAttrs
(_: v: v != null)
(n: v:
if n != "default.nix" && hasSuffix ".nix" n && v == "regular"
then
let name = removeSuffix ".nix" n; in nameValuePair (name) (_import n name)
else
if v == "directory"
then
nameValuePair n (_import n n)
else
nameValuePair ("") (null))
(readDir dir);
types.attrNameSet = attr:
let
elemType = lib.types.enum (builtins.attrNames attr);
in lib.types.mkOptionType rec {
name = "attrNameSet";
description = "set of names taken from an attribute set";
check = lib.isList;
emptyValue = { value = {}; };
getSubOptions = prefix: elemType.getSubOptions (prefix ++ ["*"]);
getSubModules = elemType.getSubModules;
substSubModules = m: lib.types.listOf (elemType.substSubModules m);
functor = (lib.types.defaultFunctor name) // { wrapped = elemType; };
merge = loc: defs: map (x: x.value) (lib.lists.filter (x: x ? value) (lib.lists.unique (lib.lists.concatLists (lib.lists.imap1 (n: def:
lib.lists.imap1 (m: def':
(lib.modules.mergeDefinitions
(loc ++ ["[definition ${toString n}-entry ${toString m}]"])
elemType
[{ inherit (def) file; value = def'; }]
).optionalValue
) def.value
) defs))));
};
overrideModuleArgs =
let
overrideModuleArgs = module: appOverride: if isFunction module then overrideModuleArgs' module appOverride else module;
overrideModuleArgs' = module: appOverride: setFunctionArgs (inputs: overrideModuleArgs (module (appOverride inputs)) id) (functionArgs module);
in overrideModuleArgs;
overrideModuleOutput =
let
overrideModuleOutput = module: appOverride: if isFunction module then overrideModuleOutput' module appOverride else appOverride module;
overrideModuleOutput' = module: appOverride: setFunctionArgs (inputs: overrideModuleOutput (module inputs) appOverride) (functionArgs module);
in overrideModuleOutput;
overrideModule = module: appInput: appOutput: overrideModuleOutput (overrideModuleArgs module appInput) appOutput;
}
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