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#!/bin/sh
# edge cases give me headache
lns () {
# prevent `mvln file1 file1` or `mvln dir1/file1 dir1/`
# which means `ln -s samename samename` or `ln -s dir/file dir/`
# both $1 and $2 here are realpath
[ "$1" != "$2" ] && ln -s -- "$1" "$2"
}
mv -i -- "$@"
# consider `mvln file1 dir/file2`
if [ $# -eq 2 ] && ! [ -d "$2" ]; then
# use realpath here
lns "$(realpath "$2")" "$(realpath "$1")"
else
dir="$(realpath -- "$(lastarg "$@")")"
# steal from https://unix.stackexchange.com/a/353833/459013
while [ $# -gt 1 ]; do
to="$(realpath -- "$1")"
# prevent `mvln dir1/ dir1/`
if [ "$dir" != "$to" ]; then
lns "$dir/$(basename "$1")" "$to"
fi
shift
done
fi
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