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utils.nix
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utils.nix
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{ lib, ... }:
let
getFileNameWithoutExtension =
file:
let
name = builtins.match "(.+)\\..+$" file;
in
builtins.elemAt name 0;
importDirBase =
{
dir,
names ? false,
}:
let
dirEntries = builtins.readDir dir;
mapDirEntries =
path: kind:
if kind == "directory" then
let
file = "${dir}/${path}/default.nix";
in
if builtins.pathExists file then [ file ] else [ ]
else if path == "default.nix" then
[ ]
else
[ "${dir}/${path}" ];
mapDirEntriesWithNames =
path: kind:
if kind == "directory" then
let
file = {
path = "${dir}/${path}/default.nix";
name = path;
};
in
if builtins.pathExists file.path then [ file ] else [ ]
else
let
file = {
path = "${dir}/${path}";
name = getFileNameWithoutExtension path;
};
in
if path == "default.nix" then [ ] else [ file ];
mapFunction = if !names then mapDirEntries else mapDirEntriesWithNames;
paths = lib.mapAttrsToList mapFunction dirEntries;
in
builtins.concatLists paths;
in
rec {
importDir = dir: importDirBase { inherit dir; };
importDirWithNames =
dir:
importDirBase {
inherit dir;
names = true;
};
importDirAsAttrSet =
{
dir,
args ? null,
}:
let
moduleFiles = importDirWithNames dir;
mapModuleFiles =
{ name, path }:
let
derivation = if args != null then import path args else import path;
in
{
${name} = derivation;
};
modules = builtins.map mapModuleFiles moduleFiles;
in
lib.mergeAttrsList modules;
inherit getFileNameWithoutExtension;
}