52 lines
1.5 KiB
Nix
52 lines
1.5 KiB
Nix
let
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inherit (builtins) isString isFloat isInt isBool isList isAttrs isNull;
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inherit (builtins) concatStringsSep filter mapAttrs attrValues;
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mkLuaNil = { _type = "nil"; };
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isLuaNil = val: getType val == "nil";
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mkDictItem = name: value: {
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_type = "dict_item";
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name = validString name;
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value = toLua value;
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};
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isDictItem = val: getType val == "dict_item";
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toLuaDictItem = name: value:
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if isNull value then null
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else "[${toLuaStr name}] = ${value}";
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toLua = val:
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if isLuaNil val then "nil"
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else if isDictItem val then toLuaDictItem val.name val.value
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else if isAttrs val then toLuaDict val
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else if isList val then toLuaList val
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else if isString val then toLuaStr val
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else if isFloat val || isInt val then toString val
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else if isBool val then toLuaBool val
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else if isNull val then null
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else throw "[nix2lua] Value '${toString val}' is not supported";
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toLuaList = val:
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wrapObj (excludeNull (map toLua val));
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toLuaDict = val: toLua (attrValues (mapAttrs mkDictItem val));
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excludeNull = val: filter (v: !(isNull v)) val;
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wrapObj = val: "{ ${concatStringsSep ", " val} }";
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toLuaStr = val: "\"${validString val}\"";
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toLuaBool = val: if val then "true" else "false";
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getType = val: if isAttrs val && val ? _type then val._type else null;
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validString = value:
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if isString value then value
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else throw "[nix2lua] Value '${toString value}' is not a valid string";
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in
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{
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inherit toLua;
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inherit mkLuaNil mkDictItem;
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}
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