On Wed, 21 Aug 2024, at 18:29, Nathan Hays via GNU coreutils Bug Reports wrote:
> Test:
> ~~~bash
> testvar=''
> [ -n $testvar ]
> echo -n unquote exit $?
> [ -n "$testvar" ]
> echo -n quote exit $?
> [ -z $testvar ]
> echo -z unquote exit $?
> [ -z "$testvar" ]
> echo -z quote exit $?
> ~~~
For this code snippet, the shellcheck linter reports
[ -n $testvar ]
^------^ SC2070: -n doesn't work with unquoted arguments. Quote or use [[
]].
^------^ SC2086: Double quote to prevent globbing and word splitting.
Did you mean:
[ -n "$testvar" ]
For more information:
https://www.shellcheck.net/wiki/SC2070 -- -n doesn't work with unquoted arg...
Cheers,
Phil
