nix/home/programs/lf/bulk-rename.sh

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old="$(mktemp)"
new="$(mktemp)"
if [ -n "$fs" ]; then
fs="$(basename -a $fs)"
else
fs="$(ls)"
fi
printf '%s\n' "$fs" >"$old"
printf '%s\n' "$fs" >"$new"
$EDITOR "$new"
[ "$(wc -l < "$new")" -ne "$(wc -l < "$old")" ] && exit
paste "$old" "$new" | while IFS= read -r names; do
src="$(printf '%s' "$names" | cut -f1)"
dst="$(printf '%s' "$names" | cut -f2)"
if [ "$src" = "$dst" ] || [ -e "$dst" ]; then
continue
fi
mv -- "$src" "$dst"
done
rm -- "$old" "$new"
lf -remote "send $id unselect"