Join multiple subrepos into one and preserve history in Mercurial

Question

Currently I have project consisting of multiple repositories, e.g.:

+---Project (main repo)
    +---Core (subrepo)
    +---Web          


        

Answer 1

Assuming you don't have to convert repos, why not simply push each repo in the central one?

1. Make sure each repo root directory have a main directory named after the repo name.
2. push each repo in the main repo.