infrastructure/lib/modules.nix
2021-03-03 03:00:51 +00:00

22 lines
872 B
Nix

{
modulesDir,
defaultFile ? "default.nix",
importAll ? false
}:
with builtins;
let
filterAttrNamesToList = filter: set: foldl' (a: b: a ++ b) [] (
map (e: if (filter e set.${e}) then [ e ] else []) (attrNames set)
);
nameValuePair = name: value: { inherit name value; };
listToAttrs = foldl' (acc: val: acc // { ${val.name} = val.value; }) {};
directories = filterAttrNamesToList (_: type: type == "directory") (readDir modulesDir);
files = map (dir: nameValuePair dir (modulesDir + "/${dir}/${defaultFile}")) directories;
modules = map ({name, value}:
# if the file contains a function, assume it to be a module and pass the path
# (for dedup and such). if it contains anything else, pass that.
let m = import value; in { inherit name; value = if (isFunction m) && !importAll then value else m; }
) files;
in (listToAttrs modules)