source: vendor/bash/3.1-p17/examples/misc/aliasconv.bash

#! /bin/bash
#
# aliasconv.bash - convert csh aliases to bash aliases and functions
#
# usage: aliasconv.bash
#
# Chet Ramey
# chet@po.cwru.edu
#
trap 'rm -f /tmp/cb$$.?' 0 1 2 3 6 15

T=$'\t'

cat << \EOF >/tmp/cb$$.1
mkalias ()
{
        case $2 in
        '')     echo alias ${1}="''" ;;
        *[#\!]*)
                comm=$(echo $2 | sed  's/\!\*/"$\@"/g
                                      s/\!:\([1-9]\)/"$\1"/g
                                      s/#/\#/g')
                echo $1 \(\) "{" command "$comm"  "; }"
                ;;
        *)      echo alias ${1}=\'$(echo "${2}" | sed "s:':'\\\\'':g")\' ;;
        esac
}
EOF

# the first thing we want to do is to protect single quotes in the alias,
# since they whole thing is going to be surrounded by single quotes when
# passed to mkalias

sed -e "s:':\\'\\\'\\':" -e "s/^\([a-zA-Z0-9_-]*\)$T\(.*\)$/mkalias \1 '\2'/" >>/tmp/cb$$.1

$BASH /tmp/cb$$.1 | sed -e 's/\$cwd/\$PWD/g' \
                     -e 's/\$term/\$TERM/g' \
                     -e 's/\$home/\$HOME/g' \
                     -e 's/\$user/\$USER/g' \
                     -e 's/\$prompt/\$PS1/g'

exit 0