When wrapping with Nix to set arguments, always uses cat mode

[spikespaz]

I have the following Nix derivation, which will replace the nvimpager command with a wrapper script:

nvimpager' = pkgs.nvimpager.overrideAttrs (self: super: {
  nativeBuildInputs = super.nativeBuildInputs or [ ] ++ [ pkgs.makeWrapper ];
  postInstall = super.postInstall or "" + ''
    wrapProgram $out/bin/nvimpager \
      --add-flags '-p -c "lua nvimpager.maps = false; lua nvimpager.git_colors = true"'
  '';
});

This is the content of the script:

#! /nix/store/ir0j7zqlw9dc49grmwplppc7gh0s40yf-bash-5.2-p15/bin/bash -e
exec -a "$0" "/nix/store/gms73z8zvfps98rdkcf2r5xs1pbay0lc-nvimpager-0.12.0/bin/.nvimpager-wrapped"  -p -c "lua nvimpager.maps = false; lua nvimpager.git_colors = true" "$@"

When I use the pager for anything from STDIN, it always just prints out the content (syntax highlighted) to my terminal.

[lucc]

In your script you have the options -p -c which are both parsed by nvimpager. Nvim options can only be given after -- or after a file argument.

[spikespaz]

If they're parsed by nvimpager why do they need to be after --?

[spikespaz]

Oh I see, I need to end the arguments parsed by nvimpager with --.

[spikespaz]

Nope, that doesn't work.

#! /nix/store/ir0j7zqlw9dc49grmwplppc7gh0s40yf-bash-5.2-p15/bin/bash -e
exec -a "$0" "/nix/store/14qsc1x1i7wwqr6kn2vdxk4wy100dwgi-nvimpager-0.12.0/bin/.nvimpager-wrapped"  -p -c "lua nvimpager.maps = false; lua nvimpager.git_colors = true" -- "$@"

[lucc]

You need nvimpager -p -- -c "lua nvimpager.maps ..." because you want to use the -c option of nvim but are actually using the -c option of nvimpager (with a file nameof "lua nvimpager.maps = ..." which probably does not exist).

[spikespaz]

Alright, I've got that. Now what is the correct way to set multiple attributes with Lua?

Error detected while processing command line:
E5107: Error loading lua [string ":lua"]:1: '=' expected near 'nvimpager'

[lucc]

You are mixing vim script and lua. You need lua nvimpager.maps = false; nvimpager.git_colors = true