pyrox.dev
nixos/less: add configFile option
Expose the path to a lesskey file as a module option. This makes it
possible to maintain a single lesskey file, used for both NixOS and
non-nix systems. An example of how this can be done follows.
1. Write a derivation that fetches lesskey from a known location:
{ stdenv, fetchgit }:
stdenv.mkDerivation {
name = "foo";
src = fetchgit { .. };
phases = [ "unpackPhase" "installPhase" ];
installPhase = "mkdir -p $out && cp $src/lesskey $out/lesskey";
}
2. Set programs.less.configFile to the corresponding path:
programs.less = {
enable = true;
configFile = "${pkgs.foo}/lesskey";
};
+15
-2
nixos/modules/programs/less.nix
+15
-2
nixos/modules/programs/less.nix
···
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cfg = config.programs.less;
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-
configFile = ''
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+
configText = if (cfg.configFile != null) then (builtins.readFile cfg.configFile) else ''
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#command
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${concatStringsSep "\n"
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(mapAttrsToList (command: action: "${command} ${action}") cfg.commands)
···
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'';
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lessKey = pkgs.runCommand "lesskey"
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-
{ src = pkgs.writeText "lessconfig" configFile; }
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+
{ src = pkgs.writeText "lessconfig" configText; }
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"${pkgs.less}/bin/lesskey -o $out $src";
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in
···
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programs.less = {
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enable = mkEnableOption "less";
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+
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+
configFile = mkOption {
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type = types.nullOr types.path;
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default = null;
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+
example = literalExample "$${pkgs.my-configs}/lesskey";
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description = ''
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Path to lesskey configuration file.
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+
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<option>configFile</option> takes precedence over <option>commands</option>,
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<option>clearDefaultCommands</option>, <option>lineEditingKeys</option>, and
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<option>envVariables</option>.
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'';
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};
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commands = mkOption {
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type = types.attrsOf types.str;