nix/utils/monitors.nix

# problem: 
#  fucking xorg changes my output names randomly !!!
# solution:
# 1. i use the `rebuild` command to rebuild my nixos system (see misc/nix.nix)
# 2. that command updates the file files/autorandr.txt BEFORE running nixos-rebuild
# 3. i extract the corrected monitor names and set them to `left` and `right` in this attrset
{ pkgs, lib, ... }: let
  # thanks to poz for the base of this run function thing
  inherit (pkgs) runCommand;
  inherit (lib) fileContents;
  run = script: fileContents (runCommand "run" { AUTORANDR_TXT = fileContents ../files/autorandr.txt; } ''
    bash -c '${script}' > $out
  '');
  printf = "${pkgs.coreutils-full}/bin/printf"; # echo removes the newlines or some shit
  rg = "${pkgs.ripgrep}/bin/rg";
  rev = "${pkgs.util-linux}/bin/rev";
  cut = "${pkgs.coreutils-full}/bin/cut";
in {
  # this parses "main: renaming display Left to DisplayPort-2"
  # and i am interested in "DisplayPort-2"
  left = run "${printf} \"$AUTORANDR_TXT\" | ${rg} Left | ${rev} | ${cut} -d\" \" -f1 | ${rev}";
  right = run "${printf} \"$AUTORANDR_TXT\" | ${rg} Right | ${rev} | ${cut} -d\" \" -f1 | ${rev}";
}