[bug#47898] [PATCH] [core-updates] Add option --xpath0 to xmllint from libxml2

[Marius Bakke <marius@gnu.org>]

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

>> libxml2-xpath0 is probably better indeed, I don't have a strong 
>> opinion.
>> Can you send an updated patch?  :-)
>> 
>> Thanks,
>> Marius
>
> Updated patch attached!

Thanks!

[...]

> gnu/packages/patches/libxml2-Add-option-xpath0.patch: New file...
> gnu/packages/xml.scm (libxml2-xpath0) [source]: ...apply it.
> ---
>  .../patches/libxml2-Add-option-xpath0.patch   | 139 ++++++++++++++++++
>  gnu/packages/xml.scm                          |  52 +++++++
>  2 files changed, 191 insertions(+)
>  create mode 100644 gnu/packages/patches/libxml2-Add-option-xpath0.patch

Please also register this patch in gnu/local.mk.  Can you also add your
copyright at the top of xml.scm?

[...]

> +(define-public libxml2-xpath0
> +  (package
> +    (name "libxml2-xpath0")
> +    (version "2.9.10")
> +    (source (origin
> +             (method url-fetch)
> +             (uri (string-append "ftp://xmlsoft.org/libxml2/libxml2-"
> +                                 version ".tar.gz"))
> +             (sha256
> +              (base32
> +               "07xynh8hcxb2yb1fs051xrgszjvj37wnxvxgsj10rzmqzy9y3zma"))
> +             (patches (list (search-patch "libxml2-Add-option-xpath0.patch")))))

You can inherit another record in Scheme to avoid duplicating all the
fields.  Then the package can be shortened to:

  (define-public libxml2-xpath0
    (package/inherit libxml2
      (name "libxml2-xpath0")
      (source (origin
                (inherit (package-source libxml2))
                (patches (append (search-patches "libxml2-Add-option-xpath0.patch")
                                 (origin-patches (package-source libxml2))))))
      (description
       "...")))

We should fill out that description to mention how it differs from the
regular libxml2.  Can you give it a try?  I can make the other changes
on your behalf, but not sure what to write.

Thanks,
Marius

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