#!/bin/bash
#
# bashprompt
#
# if there is an xterm open at a bash prompt, raise/focus that window
# if there isn't start a new xterm
#
# requires that your xterm window title has "bash" at the end
# when there is no command running and doesn't have "bash" at the end
# when a command is running
#
# see <http://unix.stackexchange.com/questions/6842> for more details
# and an example .bashrc to set the title (requires bash 3.2 or newer)
#
# Mikel Ward <mikel@mikelward.com>

# change this to whatever is unique about your window title
# (i.e. a string that appears in the title when the shell is at a prompt
#  but does not appear when running a command)
prompttitle="bash$"
terminalprog="xterm"

if ! type wmctrl >/dev/null 2>&1; then
    echo "wmctrl can't be found, please install it" 1>&2
    exit 1
fi

if ! output="$(wmctrl -l)"; then
    echo "Error running wmctrl -l" 1>&2
    exit 1
fi
while IFS=$'\n' read -r line; do
    if [[ $line =~ $prompttitle ]]; then
        id=${line%% *}
        break
    fi
done <<EOF
$output
EOF

if test -n "$id"; then
    wmctrl -i -a "$id"
else
    "$terminalprog"&
fi