Hugo: add the meta description tag to the head of the html

[ErikHendrikson]

This will add the meta tag with name="description" to the head of the html.

• the value of the tag will be set to the page's params description;

• with a fallback to the, by Hugo generated, summary of the page; and

• with a fallback to the general description of the Site Params;

For https://linear.app/usmedia/issue/CUE-252

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[myitcv]

Thanks @ErikHendrikson - what happens in the case that a description is multi-line? Do things still work ok and generate valid HTML?

[JorindeUsMedia]

Thanks @ErikHendrikson - what happens in the case that a description is multi-line? Do things still work ok and generate valid HTML?

Is you use the description in the front-matter this should not contain empty lines and should not contain html tags etc. The fallback for hugo is Summary. See https://gohugo.io/content-management/summaries/ how hugo handles this.
Note: Erik solution is the same as Hugo internals already uses for the open graph description tag.

[JorindeUsMedia]

Thanks @ErikHendrikson - what happens in the case that a description is multi-line? Do things still work ok and generate valid HTML?

Is you use the description in the front-matter this should not contain empty lines and should not contain html tags etc. The fallback for hugo is Summary. See https://gohugo.io/content-management/summaries/ how hugo handles this. Note: Erik solution is the same as Hugo internals already uses for the open graph description tag.

Just noticed there is an open PR concerning empty lines etc in Summary.
Maybe we can use the solution proposed in the pr for meta-description. For the internal (opengraph, twitter etc) we have to either wait for hugo to merge this pr or handle them ourselves (not preferred) @ErikHendrikson

gohugoio/hugo#9818
gohugoio/hugo#9856

[JorindeUsMedia]

See comment on pr. Maybe we can try to make this more solid.

[myitcv]

LGTM for now. We emit an ellipsis as part of the description which doesn't seem to make much sense... but I suggest we revisit this later as it's not critical now.

[jpluscplusm]

Imported into Gerrit

[jpluscplusm]

Closed via 0d3a50b