(or "In dash, ... is not supported." when using dash
)
#!/bin/sh
rm !(*.hs)
Either switch the shebang to a shell that does support extglob, like bash
or ksh
, or rewrite in terms of a loop with a case
or grep
match:
#!/bin/sh
for file in *
do
case "$file" in
) true;;
*.hs*) rm "$file" ;;
esac
done
Extglobs are extensions in bash and ksh, while your shebang says you're using sh
or dash
.
If you only intend to target shells that supports this feature, you can change the shebang to a shell that guarantees support, or ignore this warning.
You can use # shellcheck disable=SC3000-SC4000
to ignore all such compatibility warnings.
ShellCheck is a static analysis tool for shell scripts. This page is part of its documentation.