* less: enable by default and set LESS=-R via lesskey
* since we set PAGER=less, programs.less.enable should default to
true.
* some programs, notably git, set a custom LESS environment if none is
present. using the lesskey mechanism to set LESS=-R lets such
programs continue to run less as they see fit.
This reverts commit 0e7b4e60a8.
* less: remove use of deprecated lesskey binary format
* less: enable in environment.nix rather than less.nix
per discussion in #139988
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";
};
