Scripts to enable and disable swapping caps lock and escape on Linux, and to disable during a program's execution.

switch.sh

#!/bin/bash

if [[ $# == 0 ]]
then
  echo "Usage: $0 [normal|swapped]"
fi

case "$1" in
  normal) gsettings set org.gnome.desktop.input-sources xkb-options "[]" ;;
  swapped) gsettings set org.gnome.desktop.input-sources xkb-options "['caps:swapescape']" ;;
  *)
    echo "Invalid argument"
    exit 1
esac

wrap.sh

#!/bin/bash
# Use this script as:
# ./wrap.sh <command> <arg1...>
# To swap caps lock and escape back during the execution of the given command.
# This is useful when eg. running a game in Steam; set the launch options as
# /path/to/.../wrap.sh %command%
# to disable swapping during the game.
gsettings set org.gnome.desktop.input-sources xkb-options "[]"
$@
gsettings set org.gnome.desktop.input-sources xkb-options "['caps:swapescape']"