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# Add a colon prompt to ed when a command is expected rather than text; makes
# it feel a lot more like using ex. Only do this when stdin is a terminal,
# however. Also try and use -v for more verbose error output, and rlwrap(1) if
# it's available.
ed() {
# We're only adding options if input is from a terminal
if [[ -t 0 ]] ; then
# Colon prompt (POSIX)
set -- -p : "$@"
# Verbose if availble (not POSIX)
if ed -sv - </dev/null >&0 2>&0 ; then
set -- -v "$@"
fi
fi
# Execute the ed(1) call, in a wrapper if appropriate and with the
# concluded options
if [[ -t 0 ]] && hash rlwrap 2>/dev/null ; then
command rlwrap ed "$@"
else
command ed "$@"
fi
}
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