GetXML implementation using antchfx/xmlquery

[vanbroup]

An XML data implementation of GetXML using https://github.com/antchfx/xmlquery

Exposing the Node type which allows users to get sub elements, attributes and use xpath filters.

Fixing #4470

[CLAassistant]

All committers have signed the CLA.

[jmooring]

This PR should also update:

• docs/content/en/templates/data-templates.md
• docs/content/en/getting-started/configuration.md

[jmooring]

I don't understand how I am supposed to use this. With this XML, how do I retrieve the value of body?

{{ $d := getXML "https://www.w3schools.com/xml/note.xml" }}
{{ $d.body }} --> error
{{ $d.note.body }} --> error

[vanbroup]

This is an example usage for reading an RSS feed:

{{ $rss := getXML "https://www.example.com/feed/" }}
{{ $items = $items | append ($rss.SelectElements "//item") }}
{{ range $items }}
    <strong>{{ (.SelectElement "title").InnerText }}</strong><br />
    <p>{{ (.SelectElement "description").InnerText | plainify | htmlUnescape }}</p>
    {{ $link := (.SelectElement "link").InnerText }}
    <a href="{{ $link }}">{{ $link }}</a><br />
    <hr>
{{ end }}

[vanbroup]

I don't understand how I am supposed to use this. With this XML, how do I retrieve the value of body?

{{ $d := getXML "https://www.w3schools.com/xml/note.xml" }}
{{ $d.body }} --> error
{{ $d.note.body }} --> error

{{ $note := getXML "https://www.w3schools.com/xml/note.xml" }}
{{ ($note.SelectElement "//note//body").InnerText }}

[jmooring]

@vanbroup Thanks. This is very different than getJSON/getCSV, and as it stands is going to be difficult to explain/support.

[bep]

Thanks for this,

The code looks good, but I'm not merging this now.

I have two comments about this:

• When we add XML as a data format in Hugo it should work as a new data format where the others work (more or less), e.g. /data and transform.Unmarshal.
• There is another issue that talks about replacing getJSON (and friends with a resources.GetRemote (or something), which would be format agnostic (also hopefully).
• I'm not sure how I would expect an XML structure to look like in the templates, but it should be similar to what we have now and not require some special knowledge about some special API.

[github-actions]

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