66 lines
1.5 KiB
Nix
66 lines
1.5 KiB
Nix
{ lib, substituteAll, ... }:
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let
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inherit (builtins) length elemAt isList isString hasAttr getAttr;
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###########################################################################
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# Helpers
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# Source: https://github.com/NixOS/nixpkgs/blob/d61bc96d16ca288c69b798b8e31eca64050098e3/lib/lists.nix
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foldr = op: nul: list:
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let
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len = length list;
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fold' = n:
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if n == len
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then nul
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else op (elemAt list n) (fold' (n + 1));
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in
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fold' 0;
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concatMap = op: list:
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let
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concat = (a: b: op a + b);
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in
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foldr concat "" list;
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############################################################################
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# Configs
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optional = cond: val:
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let
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def =
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if isList val then [ ]
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else if isString val then ""
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else null;
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in
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if cond then val else def;
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getAttrOpt = a: s:
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if hasAttr a s then getAttr a s else null;
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#############################################################################
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# Lua
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mkLuaHeredoc = content: ''
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lua << EOF
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${content}
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EOF
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'';
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mkLuaRc = contents: concatMap mkLuaHeredoc contents;
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############################################################################
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# Configs
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readSubFile = src: params: builtins.readFile
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(substituteAll (params // { inherit src; }));
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in
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{
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inherit (lib) importJSON attrByPath;
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inherit foldr concatMap;
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inherit optional getAttrOpt;
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inherit mkLuaHeredoc mkLuaRc;
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inherit readSubFile substituteAll;
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}
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