how to swap insert and delete keys on nixos

nixos_swap_insert_and_delete_howto.md

First, scan through these helpful links:

• https://www.reddit.com/r/linux_gaming/comments/nypsi1/updated_guide_to_remapping_keys_on_linux_using/
• https://github.com/systemd/systemd/blob/main/hwdb.d/60-evdev.hwdb
• https://search.nixos.org/options?channel=23.11&show=services.udev.extraHwdb&from=0&size=50&sort=relevance&type=packages&query=hwdb

This is what I ended up adding to /etc/nixos/configure.nx file. This is specific to the keyboard that is in my laptop. Unless you also have the same basic US keyboard they shiped with my framework 13 (circa April 2024), you will want to modify this udev rule accordingly. The information on how to do that can be found in the reddit post and 60-evdev.hwdb file linked above.

  services.udev.extraHwdb = ''
    # This swaps the position of the insert and delete keys, but only
    # for this laptop's keyboard in specific.
    # I: Bus=0011 Vendor=0001 Product=0001 Version=ab83
    # N: Name="AT Translated Set 2 keyboard"
    #evdev:input:b0011v0001p0001eAB83*
    evdev:name:AT Translated Set 2 keyboard:*
      KEYBOARD_KEY_d2=delete
      KEYBOARD_KEY_d3=insert
    '';

Once you're all set and filled with excessive confidence, run the usual sudo nixos-rebuild switch and reboot.