mirror of
https://github.com/nix-community/home-manager
synced 2024-11-24 12:09:46 +01:00
fce9dbfeb4
Added a generator for the KDL document language. This is in order for home-manager to natively generate the new config format for zellij, as described in nix-community#3364. There is not a one to one mapping between KDL and nix types, but attrset translation is heavily based on KDLs JSON-IN-KDL microsyntax. The exception here is the `_args` and `_props` arguments, which lets you specify arguments and properties as described in the spec. See more here: - https://kdl.dev/ - https://github.com/kdl-org/kdl/blob/main/SPEC.md The generator also conforms to the interface from the nixpkgs manual: https://nixos.org/manual/nixpkgs/stable/#sec-generators Co-authored-by: Gaetan Lepage <gaetan@glepage.com>
102 lines
3.6 KiB
Nix
102 lines
3.6 KiB
Nix
{ lib }:
|
|
|
|
{
|
|
toKDL = { }:
|
|
let
|
|
inherit (lib) concatStringsSep splitString mapAttrsToList any;
|
|
inherit (builtins) typeOf replaceStrings elem;
|
|
|
|
# ListOf String -> String
|
|
indentStrings = let
|
|
# Although the input of this function is a list of strings,
|
|
# the strings themselves *will* contain newlines, so you need
|
|
# to normalize the list by joining and resplitting them.
|
|
unlines = lib.splitString "\n";
|
|
lines = lib.concatStringsSep "\n";
|
|
indentAll = lines: concatStringsSep "\n" (map (x: " " + x) lines);
|
|
in stringsWithNewlines: indentAll (unlines (lines stringsWithNewlines));
|
|
|
|
# String -> String
|
|
sanitizeString = replaceStrings [ "\n" ''"'' ] [ "\\n" ''\"'' ];
|
|
|
|
# OneOf [Int Float String Bool Null] -> String
|
|
literalValueToString = element:
|
|
lib.throwIfNot
|
|
(elem (typeOf element) [ "int" "float" "string" "bool" "null" ])
|
|
"Cannot convert value of type ${typeOf element} to KDL literal."
|
|
(if typeOf element == "null" then
|
|
"null"
|
|
else if element == false then
|
|
"false"
|
|
else if element == true then
|
|
"true"
|
|
else if typeOf element == "string" then
|
|
''"${sanitizeString element}"''
|
|
else
|
|
toString element);
|
|
|
|
# Attrset Conversion
|
|
# String -> AttrsOf Anything -> String
|
|
convertAttrsToKDL = name: attrs:
|
|
let
|
|
optArgsString = lib.optionalString (attrs ? "_args")
|
|
(lib.pipe attrs._args [
|
|
(map literalValueToString)
|
|
(lib.concatStringsSep " ")
|
|
(s: s + " ")
|
|
]);
|
|
|
|
optPropsString = lib.optionalString (attrs ? "_props")
|
|
(lib.pipe attrs._props [
|
|
(lib.mapAttrsToList
|
|
(name: value: "${name}=${literalValueToString value}"))
|
|
(lib.concatStringsSep " ")
|
|
(s: s + " ")
|
|
]);
|
|
|
|
children =
|
|
lib.filterAttrs (name: _: !(elem name [ "_args" "_props" ])) attrs;
|
|
in ''
|
|
${name} ${optArgsString}${optPropsString}{
|
|
${indentStrings (mapAttrsToList convertAttributeToKDL children)}
|
|
}'';
|
|
|
|
# List Conversion
|
|
# String -> ListOf (OneOf [Int Float String Bool Null]) -> String
|
|
convertListOfFlatAttrsToKDL = name: list:
|
|
let flatElements = map literalValueToString list;
|
|
in "${name} ${concatStringsSep " " flatElements}";
|
|
|
|
# String -> ListOf Anything -> String
|
|
convertListOfNonFlatAttrsToKDL = name: list: ''
|
|
${name} {
|
|
${indentStrings (map (x: convertAttributeToKDL "-" x) list)}
|
|
}'';
|
|
|
|
# String -> ListOf Anything -> String
|
|
convertListToKDL = name: list:
|
|
let elementsAreFlat = !any (el: elem (typeOf el) [ "list" "set" ]) list;
|
|
in if elementsAreFlat then
|
|
convertListOfFlatAttrsToKDL name list
|
|
else
|
|
convertListOfNonFlatAttrsToKDL name list;
|
|
|
|
# Combined Conversion
|
|
# String -> Anything -> String
|
|
convertAttributeToKDL = name: value:
|
|
let vType = typeOf value;
|
|
in if elem vType [ "int" "float" "bool" "null" "string" ] then
|
|
"${name} ${literalValueToString value}"
|
|
else if vType == "set" then
|
|
convertAttrsToKDL name value
|
|
else if vType == "list" then
|
|
convertListToKDL name value
|
|
else
|
|
throw ''
|
|
Cannot convert type `(${typeOf value})` to KDL:
|
|
${name} = ${toString value}
|
|
'';
|
|
in attrs: ''
|
|
${concatStringsSep "\n" (mapAttrsToList convertAttributeToKDL attrs)}
|
|
'';
|
|
}
|