With cgit I can set configuration variable section-from-path
and it makes all repos be grouped under their directories like
at https://git.cepl.eu/cgit/. Unfortunately, I cannot find the
equivalent for the plain gitweb, so https://git.cepl.eu/git/
looks convoluted.

Any idea, how to achieve the same effect with gitweb?

Thank you,

Matěj

-- 
http://matej.ceplovi.cz/blog/, @mcepl@floss.social
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For a successful technology, reality must take precedence over
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    -- R. P. Feynman’s concluding sentence
       in his appendix to the Challenger Report