david larsson <david.larsson@selfhosted.xyz> skriver:

> Hi, new patch attached. There's a lint warning though: 
> "libxml2-xpath0@2.9.10: no updater for libxml2-xpath0". I don't know 
> what it means, maybe it should be fixed before committing?

That warning is harmless and affects a lot of packages.  I've applied
the patch with a couple minor tweaks:

> +From e1df743329bdfd94fbfdea18303c5c6c6fe13403 Mon Sep 17 00:00:00 2001
> +From: methuselah-0 <david.larsson@selfhosted.xyz>
> +Date: Thu, 1 Apr 2021 08:33:56 +0200
> +Subject: [PATCH] Add option --xpath0
> +
> +---
> + doc/xmllint.xml | 16 ++++++++++++++++
> + xmllint.c       | 32 +++++++++++++++++++++++---------
> + 2 files changed, 39 insertions(+), 9 deletions(-)

I replaced this git-style patch header with a short description and an
URL to the upstream issue, like we usually do.

> +(define-public libxml2-xpath0
> +  (package/inherit libxml2
> +    (name "libxml2-xpath0")
> +    (source (origin
> +              (inherit (package-source libxml2))
> +              (patches (append (search-patches
> +                                "libxml2-xpath0-Add-option-xpath0.patch")
> +                               (origin-patches (package-source libxml2))))))
> +    (description
> +     "Libxml2-xpath0 is like libxml2 but with a patch applied that
> +provides an --xpath0 option to xmllint that enables it to output xpath
> +results with a null delimiter")))

...and sprinkled some markup and punctuation into the description.

Pushed as b58efbc6611550ad9234163e198ff71ace5306ea, thank you!