GNU bug report logs - #48232
[PATCH 0/2] Add mercurial-commitsigs and some changes to Mercurial.

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From: Ludovic Courtès <ludo <at> gnu.org>
To: Xinglu Chen <public <at> yoctocell.xyz>
Cc: 48232 <at> debbugs.gnu.org
Subject: [bug#48232] [PATCH 0/2] Add mercurial-commitsigs and some changes to Mercurial.
Date: Wed, 12 May 2021 22:56:11 +0200

Hi,

Xinglu Chen <public <at> yoctocell.xyz> skribis:

[...]

> 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”.
>
> This is needed to make Mercurial read the HGEXTENSIONPATH to detect
> third-party extensions.  It is called HGEXTENSIONPATH and not
> HG_EXTENSION_PATH to keep it consistent with other environment variables for
> Mercurial, e.g. HGENCODINGAMBIGUOUS, HGEDITOR ...  Hopefully I or someone else
> will get this into Mercurial proper.
>
> diff --git a/mercurial/extensions.py b/mercurial/extensions.py
> --- a/mercurial/extensions.py
> +++ b/mercurial/extensions.py
> @@ -13,6 +13,7 @@
>  import imp
>  import inspect
>  import os
> +import sys
>  
>  from .i18n import (
>      _,
> @@ -108,6 +109,8 @@
>  
>  def _importh(name):
>      """import and return the <name> module"""
> +    # Read HGEXTENSIONPATH environment variable when import extensions.
> +    sys.path.append(os.getenv("HGEXTENSIONPATH"))

Perhaps you need to handle the case where HGEXTENSIONPATH is undefined?
(This could explain the test failures that you see, no?)

Also, I’m no Pythonista, but if ‘sys.path’ is a list, then you have to
split the value of HGEXTENSIONPATH on colons.

Thanks,
Ludo’.

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