[Libguestfs] [PATCH nbdkit] docs: Suggest how to detect if a filter is installed.

[Martin Kletzander]

On Sat, Sep 21, 2019 at 03:53:45PM +0100, Richard W.M. Jones wrote:
>Thanks: Eric Blake, Martin Kletzander.
>---
> docs/nbdkit-probing.pod | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
>diff --git a/docs/nbdkit-probing.pod b/docs/nbdkit-probing.pod
>index 94bdfb4..46a7c47 100644
>--- a/docs/nbdkit-probing.pod
>+++ b/docs/nbdkit-probing.pod
>@@ -80,6 +80,17 @@ installed.  A complete shell script which does this is:
>      fi
>  done
>
>+=head2 Detect if a filter is installed
>+
>+To find out if a filter is installed (and working) use
>+I<--dump-plugin> with the C<null> plugin and the name of the filter to
>+test:
>+
>+ nbdkit --dump-plugin --filter=foo null
>+
>+This will fail with an error and non-zero exit code if the C<foo>
>+filter cannot be loaded.
>+

Looks good, for people like me it would be also nice to mention that the above
command will list the filter's parameters as well.

ACK

> =head1 SEE ALSO
>
> L<nbdkit(1)>.
>-- 
>2.23.0
>
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