123 lines
2.9 KiB
Nix
123 lines
2.9 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.programs.less;
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configFile = ''
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#command
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${concatStringsSep "\n"
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(mapAttrsToList (command: action: "${command} ${action}") cfg.commands)
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}
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${if cfg.clearDefaultCommands then "#stop" else ""}
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#line-edit
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${concatStringsSep "\n"
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(mapAttrsToList (command: action: "${command} ${action}") cfg.lineEditingKeys)
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}
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#env
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${concatStringsSep "\n"
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(mapAttrsToList (variable: values: "${variable}=${values}") cfg.envVariables)
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}
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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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"${pkgs.less}/bin/lesskey -o $out $src";
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lessPipe = pkgs.writeScriptBin "lesspipe.sh" ''
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#! /bin/sh
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case "$1" in
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*.gz)
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${pkgs.gzip}/bin/gunzip --stdout "$1" 2>/dev/null
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;;
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*.xz)
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${pkgs.xz}/bin/unxz --stdout "$1" 2>/dev/null
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;;
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*.bz2)
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${pkgs.bzip2}/bin/bunzip2 --stdout "$1" 2>/dev/null
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;;
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*) exit 1
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;;
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esac
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exit $?
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'';
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in
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{
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options = {
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programs.less = {
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enable = mkEnableOption "less";
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commands = mkOption {
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type = types.attrsOf types.str;
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default = {};
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example = {
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"h" = "noaction 5\e(";
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"l" = "noaction 5\e)";
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};
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description = "Defines new command keys.";
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};
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clearDefaultCommands = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Clear all default commands.
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You should remember to set the quit key.
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Otherwise you will not be able to leave less without killing it.
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'';
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};
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lineEditingKeys = mkOption {
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type = types.attrsOf types.str;
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default = {};
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example = {
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"\e" = "abort";
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};
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description = "Defines new line-editing keys.";
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};
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envVariables = mkOption {
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type = types.attrsOf types.str;
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default = {};
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example = {
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LESS = "--quit-if-one-screen";
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};
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description = "Defines environment variables.";
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};
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autoExtract = mkOption {
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type = types.bool;
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default = true;
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description = ''
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When enabled less automatically extracts .gz .xz .bz2 files before reading them.
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'';
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};
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};
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};
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config = mkIf cfg.enable {
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environment.systemPackages = [ pkgs.less ];
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environment.variables."LESSKEY_SYSTEM" = toString lessKey;
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environment.variables."LESSOPEN" = "|${lessPipe}/bin/lesspipe.sh %s";
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warnings = optional (
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cfg.clearDefaultCommands && (all (x: x != "quit") (attrValues cfg.commands))
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) ''
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config.programs.less.clearDefaultCommands clears all default commands of less but there is no alternative binding for exiting.
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Consider adding a binding for 'quit'.
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'';
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};
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meta.maintainers = with maintainers; [ johnazoidberg ];
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}
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