#!/bin/bash
command -v import &>/dev/null || { echo "this needs imagemagick"; exit 1; }
[[ $TERM == 'linux' ]] && { echo "this doesn't work in a tty"; exit 2; }
[[ $(tput cols) -le 100 ]] && { echo 'Maximize the terminal window and press enter.'; read; }
DOC_DIR=$(cd "$(dirname "$0")" && pwd)
cd "$(mktemp -d)" && mkdir '~' && cd '~'
for what in 'exit' venv hg git root ; do
    clear
    grep -v '^\s*\(#\|$\)' "$DOC_DIR/prompt-session-$what.sh" | HISTFILE= bash -i
    sleep 1 # otherwise "$ exit" is in a superposition of showing and not showing
    import -window "$WINDOWID" "$DOC_DIR/prompt-$what.png"
    mogrify -trim -background black -extent 800x "$DOC_DIR/prompt-$what.png"
done
clear
echo all done