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neovim/lib.nix

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