[PATCH STABLE] procutil: extend gui test to detect wayland session (issue6479)

[Raphaël Gomès]

Thanks for doing this patch so quickly Yuja. LGTM

On 2/4/21 12:21 PM, Yuya Nishihara wrote:
> # HG changeset patch
> # User Yuya Nishihara <yuya at tcha.org>
> # Date 1612436205 -32400
> #      Thu Feb 04 19:56:45 2021 +0900
> # Branch stable
> # Node ID 6cc6b8610cec85dc624f4bb6568c2fd16ac018d1
> # Parent  14feaa5792ed116ec8cc8469fc3de976fb4dd8f5
> procutil: extend gui test to detect wayland session (issue6479)
>
> diff --git a/mercurial/utils/procutil.py b/mercurial/utils/procutil.py
> --- a/mercurial/utils/procutil.py
> +++ b/mercurial/utils/procutil.py
> @@ -546,7 +546,11 @@ def _gui():
>               # pure build; use a safe default
>               return True
>       else:
> -        return pycompat.iswindows or encoding.environ.get(b"DISPLAY")
> +        return (
> +            pycompat.iswindows
> +            or encoding.environ.get(b"DISPLAY")
> +            or encoding.environ.get(b"WAYLAND_DISPLAY")
> +        )
>   
>   
>   def gui():
>
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