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feat(alejandra): add settings option for indentation config #513

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feat(alejandra): add settings option for indentation config #513

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41 changes: 40 additions & 1 deletion programs/alejandra.nix
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Original file line number Diff line number Diff line change
@@ -1,4 +1,16 @@
{ mkFormatterModule, ... }:
{
lib,
pkgs,
config,
mkFormatterModule,
...
}:
let
inherit (lib) mkOption types;

cfg = config.programs.alejandra;
configFormat = pkgs.formats.toml { };
in
{
meta.maintainers = [ ];

Expand All @@ -8,4 +20,31 @@
includes = [ "*.nix" ];
})
];

options.programs.alejandra.settings = {
indentation = mkOption {
description = "Indentation style to use when formatting Nix files.";
type = types.nullOr (
types.enum [
"TwoSpaces"
"FourSpaces"
"Tabs"
]
);
default = null;
example = "FourSpaces";
};
};

config = lib.mkIf cfg.enable {
settings.formatter.alejandra.options =
let
settings = lib.filterAttrsRecursive (_: v: v != null) cfg.settings;
configFile = configFormat.generate "alejandra.toml" settings;
in
lib.optionals (settings != { }) [
"--experimental-config"
(toString configFile)
];
};
}