absolute_url not working with empty url

[buckle2000]

{{ page.permalink | absolute_url }} will not work if page.permalink is `` (i.e. index page).

[buckle2000]

I found the cause.

jekyll/lib/jekyll/filters/url_filters.rb

Line 12 in 7118999

return if input.nil?

Why is this the default behavior?

[ashmaroli]

absolute_url is designed to prepend <site.url>/<site.baseurl>/ to <non-empty_input>
If your site.url, site.baseurl and input are empty, then the filter returns an empty string.

[buckle2000]

I think absolute_url should transform any URL-like string into a complete URL. For example, HTTPS://google.com should remain unchanged.

In the current version, this processor will only append something in front of input. This is not absolute at all.

[ashmaroli]

what is the expected complete url string in your case?

[ashmaroli]

if your site is configured as

url: http://www.example.com
baseurl: /blog

then for given path assets/css/style.css

absolute_url = http://www.example.com/blog/assets/css/style.css
relative_url = /blog/assets/css/style.css

and for the index-page its:

absolute_url = http://www.example.com/blog
relative_url = /blog

[ashmaroli]

or you could define index-page url as simply /
then

absolute_url = http://www.example.com/blog/
relative_url = /blog/

[o0nj]

I have tried to reproduce the issue. Calling page.url instead of page.permalink seems to deliver the expected result:

{{ page.url | absolute_url }}

Does that work for your use case?

[buckle2000]

That is useful!
Thanks.