auto monitor name thingy!!!!

files/autorandr.txt

@@ -0,0 +1,3 @@
+main: renaming display Left to DisplayPort-2
+main: renaming display Right to HDMI-A-0
+main (detected)

misc/nix.nix

@@ -6,6 +6,15 @@ args @ { pkgs, ... }:
     "freeimage-unstable-2021-11-01"
   ];
 
+  home-manager.users.krizej.home.packages = [
+    (pkgs.writeShellScriptBin "rebuild" ''
+      # hack: update autorandr stuffs
+      autorandr --match-edid --dry-run &> ~/nix/files/autorandr.txt
+
+      sudo nixos-rebuild switch --flake ~/nix --show-trace -v
+    '')
+  ];
+
   nixpkgs.overlays = import ../pkgs args;
   nixpkgs.config.allowUnfree = true;
 }

misc/system.nix

@@ -1,4 +1,4 @@
-{ pkgs, ... }:
+args @ { pkgs, ... }:
 {
   boot = {
     loader = {
@@ -12,9 +12,11 @@
       };
     };
     # this doesn't even work
-    kernelParams = [
-      "video=DP-3:1920x1080@240"
-      "video=HDMI-1:1920x1080@75"
+    kernelParams = let
+      monitors = import ../utils/monitors.nix args;
+    in [
+      "video=${monitors.left}:1920x1080@240"
+      "video=${monitors.right}:1920x1080@75"
     ];
     initrd.kernelModules = [ "amdgpu" ];
   };
@@ -28,6 +30,12 @@
 
   system.stateVersion = "23.11";
 
+  system.userActivationScripts = { 
+    test2 = ''
+      ${pkgs.autorandr}/bin/autorandr --match-edid --dry-run &> /home/krizej/dupaa
+    ''; 
+  };
+
   users.users.krizej = {
     isNormalUser = true;
     extraGroups = [ "wheel" "input" ];

programs/i3.nix

@@ -51,8 +51,8 @@ in {
 
         defaultWorkspace = "workspace number 1";
         workspaceOutputAssign = [
-          { workspace = "1"; output = "DisplayPort-2"; } # monitors.left; }
-          { workspace = "2"; output = "HDMI-A-0"; } # monitors.right; }
+          { workspace = "1"; output = monitors.left; }
+          { workspace = "2"; output = monitors.right; }
         ];
 
         focus = {
@@ -241,7 +241,6 @@ in {
     home.file = {
       ".config/i3/workspace2.json".source = ../files/workspace2.json;
       ".config/i3/i3gtk.css".source = ../files/i3gtk.css;
-      "dupa".text = "[${monitors.left}][${monitors.right}]";
     };
   };
 }

services/xserver.nix

@@ -7,6 +7,7 @@
 
       displayManager = {
         # THIS SHIT DOESN'T WORK!!!
+        # TODO: REPLACE MONITOR NAMES HERE WHEN I START CARING
         setupCommands = ''
           xrandr --output DP-3 --mode 1920x1080 --rate 239.76 --primary
           xrandr --output HDMI-1 --off

utils/monitors.nix

@@ -1,20 +1,23 @@
-# fixme: when rebuiling the commands are ran as some nixos builder user probably and autorandr does not use my config
-{ pkgs, ... }: let
-  autorandr = "${pkgs.autorandr}/bin/autorandr";
+# problem: 
+#  fucking xorg changes my output names randomly !!!
+# solution:
+# 1. i use the `rebuild` command to rebuild my nixos system (see misc/nix.nix)
+# 2. that command updates the file files/autorandr.txt BEFORE running nixos-rebuild
+# 3. i extract the corrected monitor names and set them to `left` and `right` in this attrset
+{ pkgs, lib, ... }: let
+  # thanks to poz for the base of this run function thing
+  inherit (pkgs) runCommand;
+  inherit (lib) fileContents;
+  run = script: fileContents (runCommand "run" { AUTORANDR_TXT = fileContents ../files/autorandr.txt; } ''
+    bash -c '${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";
-  # epically stolen from https://git.jacekpoz.pl/jacekpoz/nte/src/branch/master/stdlib.nix
-  # but i changed lib.strings.readFile to lib.fileContents
-  inherit (pkgs) lib runCommand;
-  inherit (lib) fileContents;
-  run = script: builtins.toString (runCommand "run" {} ''
-    echo $(${script}) > $out
-  '');
 in {
   # this parses "main: renaming display Left to DisplayPort-2"
   # and i am interested in "DisplayPort-2"
-  # and also it's printed to stderr so 2>&1
-  left = run "${autorandr} --match-edid 2>&1 | ${rg} Left | ${rev} | ${cut} -d' ' -f1 | ${rev}";
-  right = run "${autorandr} --match-edid 2>&1 | ${rg} Right | ${rev} | ${cut} -d' ' -f1 | ${rev}";
+  left = run "${printf} \"$AUTORANDR_TXT\" | ${rg} Left | ${rev} | ${cut} -d\" \" -f1 | ${rev}";
+  right = run "${printf} \"$AUTORANDR_TXT\" | ${rg} Right | ${rev} | ${cut} -d\" \" -f1 | ${rev}";
 }