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#!/usr/bin/env bash
# Run ed(1) over multiple files, duplicating stdin.
# Give up completely if no BASH_VERSINFO (<2.0)
[ -n "$BASH_VERSINFO" ] || exit
# Parse options out, give help if necessary
declare -a opts
for arg ; do
case $arg in
--)
shift
break
;;
-*)
shift
opts[${#opts[@]}]=$arg
;;
esac
done
# Need at least one file after options are parsed out
if ! (($#)) ; then
printf >&2 'edda: Need at least one file\n'
exit 2
fi
# Create a temporary directory with name in $td, and a trap to remove it when
# the script exits
td=
cleanup() {
[[ -n "$td" ]] && rm -fr -- "$td"
}
trap cleanup EXIT
td=$(mktd "$self") || exit
# Duplicate stdin into a file
script=$td/script
cat >"$script" || exit
# Run ed(1) over each file with the options and stdin given
for file ; do
ed "${opts[@]}" -- "$file" <"$script"
done
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