Zola build error if site has no title

[JVimes]

System information

I get the following error if there's no main title variable in config.toml:

Error: Failed to build the site
Error: Failed to render section '\?\C:\Users\foo\Desktop\Website\content_index.md'
Error: Reason: Failed to render 'index.html' (error happened in 'base.html').
Error: Reason: Tried to concat a value that is not a string or a number from ident prefix

This is the situation after going through First Steps with Zola. I think it's probably worth supporting sites without titles.

Zola version: 0.21.0
tabi version or commit: 886aa59

Expected behaviour

No error.

Actual behaviour

There's an error.

Steps to reproduce

1. Create a fresh Zola site with a minimal config.toml file that has tabi:

   base_url = "https://ponderosagames.com"
   theme = "tabi"

2. Run zola serve

Additional context

No response

Final checklist

• I've checked that the issue isn't already reported.
• I've tested with the latest version of tabi to check if the issue has already been fixed.

[Poolitzer]

Just had a flashback, either that or throw an error like duckquill does https://codeberg.org/daudix/duckquill/commit/35d94aacdf579e7918ae928bc1dc83196cb38221

[welpo]

I only had time to glance at the duckquill discussion (thanks, @Poolitzer!). From what I understand, the title is necessary?

(I can take a proper look in ~2 weeks; happy to review PRs)

[JVimes]

Thanks! For Zola, only the base_url variable is mandatory.

[Poolitzer]

As introduced in a384ac8, I got this pretty nice error telling me for this theme I would need a title.

I can understand why. It looks empty without one:

And the atom feed looks a bit stupid, since its missing a title.

Apart from these two the website does build though.

So while I can understand your point, that following the getting started zola introduction does leave one without a title, and it would be nice to have no friction for these people. I do prefere this approach where one does have a proper looking website/atom feeds, even though one needs to read the error messages and add a title.

Edit: Thinking about it, instead of having it empty, why not set website as default? I think that allows people to follow the tutorial and not look to weird.