On Tue, May 11 2021, Xinglu Chen wrote:

>> Let’s see if you can adjust hg to honor a new environment variable,
>> and if not, we’ll see…
>
> Hmm, I will try to see what I can do.

I am no Python expert, but Mercurial is able to load the commitsigs.py
module when I applying the attached patch and putting the following in
~/.config/hg/hgrc.

  [extensions]
  commitsigs = 

However, two of the tests are failing, they are related to multiple
people trying to push to the same repo at the same time.  I don’t know
why they would fail, and I don’t know if my patch will break things in
the “real world”.