emacsclient

#!/bin/bash
# Launch emacsclient with the most appropriate toolkit (currently gtk (for real
# x11) or wayland)

# The environment variable EMACS_TOOLKIT can be used to specify the preferred toolkit.
# The value should be one of: gtk or wayland

# If the environment variable is not set, the script will try to detect the
# toolkit to use by checking if the XDG_SESSION_TYPE environment variable is
# set to wayland or x11.

if [ -n "${XDG_SESSION_TYPE}" ]; then
  if [ "${XDG_SESSION_TYPE}" = "wayland" ]; then
    : "${EMACS_TOOLKIT:=wayland}"
  else
    : "${EMACS_TOOLKIT:=gtk}"
  fi
else
  : "${EMACS_TOOLKIT:=gtk}"
fi

case "${EMACS_TOOLKIT}" in
  gtk|wayland)
    ;;
  *)
    echo "Invalid value for EMACS_TOOLKIT: ${EMACS_TOOLKIT} - must be either gtk or wayland"
    exit 1
    ;;
esac

EMACSCLIENT="emacsclient-${EMACS_TOOLKIT}"

# add logic from the upstream emacsclient.desktop script which supports
# spawning a new frame when launched with no arguments but only do this
# when we are launched from the desktop file which we can detect via the
# GIO_LAUNCHED_DESKTOP_FILE environment variable and associated
# GIO_LAUNCHED_DESKTOP_FILE_PID
if [ -n "$GIO_LAUNCHED_DESKTOP_FILE" ] && [ "$$" -eq "$GIO_LAUNCHED_DESKTOP_FILE_PID" ]; then
  # the following is the logic from the upstream emacsclient.desktop file other
  # than the wayland display handling if statement
  if [ -n "$*" ]; then
    # only set --display if EMACS_TOOLKIT is not wayland -
    # https://github.com/alexmurray/emacs-snap/issues/98
    if [ "${EMACS_TOOLKIT}" != "wayland" ]; then
      set -- --display="$DISPLAY" "$@"
    fi
    exec "$SNAP/usr/bin/$EMACSCLIENT" --alternate-editor= "$@"
  else
    exec "$SNAP/usr/bin/$EMACSCLIENT" --alternate-editor= --create-frame
  fi
else
  exec "$SNAP/usr/bin/$EMACSCLIENT" "$@"
fi