46 lines
1.3 KiB
Nix
46 lines
1.3 KiB
Nix
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{ config, lib, pkgs, ... }:
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# https://github.com/michalrus/dotfiles/blob/d943be3089aa436e07cea5f22d829402936a9229/.nixos-config.symlink/modules/sane-extra-config.nix
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# via https://github.com/NixOS/nixpkgs/issues/17411
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# via https://unix.stackexchange.com/questions/321954/install-epson-v39-on-nixos
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with lib;
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let
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cfg = config.hardware.sane;
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pkg = if cfg.snapshot
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then pkgs.sane-backends-git
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else pkgs.sane-backends;
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backends = [ pkg ] ++ cfg.extraBackends;
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saneConfig = pkgs.mkSaneConfig { paths = backends; };
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saneExtraConfig = pkgs.runCommand "sane-extra-config" {} ''
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cp -Lr '${pkgs.mkSaneConfig { paths = [ pkgs.sane-backends ]; }}'/etc/sane.d $out
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chmod +w $out
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${concatMapStrings (c: ''
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f="$out/${c.name}.conf"
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[ ! -e "$f" ] || chmod +w "$f"
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cat ${builtins.toFile "" (c.value + "\n")} >>"$f"
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chmod -w "$f"
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'') (mapAttrsToList nameValuePair cfg.extraConfig)}
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chmod -w $out
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'';
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in
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{
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options = {
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hardware.sane.extraConfig = mkOption {
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type = types.attrsOf types.lines;
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default = {};
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example = { "some-backend" = "# some lines to add to its .conf"; };
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};
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};
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config = mkIf (cfg.enable && cfg.extraConfig != {}) {
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hardware.sane.configDir = saneExtraConfig.outPath;
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};
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}
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