Re: [PATCH] meson: Fix MESONINTROSPECT parsing

[Peter Maydell <peter.maydell@linaro.org>]

On Sat, 12 Aug 2023 at 13:10, Akihiko Odaki <akihiko.odaki@daynix.com> wrote:
>
> On 2023/08/12 15:15, Akihiko Odaki wrote:
> > The arguments in MESONINTROSPECT are quoted with shlex.quote() so it
> > must be parsed with shlex.split().
> >
> > Fixes: cf60ccc330 ("cutils: Introduce bundle mechanism")
> > Reported-by: Michael Tokarev <mjt@tls.msk.ru>
> > Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
> > ---
> >   scripts/symlink-install-tree.py | 3 ++-
> >   1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/scripts/symlink-install-tree.py b/scripts/symlink-install-tree.py
> > index 8ed97e3c94..b72563895c 100644
> > --- a/scripts/symlink-install-tree.py
> > +++ b/scripts/symlink-install-tree.py
> > @@ -4,6 +4,7 @@
> >   import errno
> >   import json
> >   import os
> > +import shlex
> >   import subprocess
> >   import sys
> >
> > @@ -14,7 +15,7 @@ def destdir_join(d1: str, d2: str) -> str:
> >       return str(PurePath(d1, *PurePath(d2).parts[1:]))
> >
> >   introspect = os.environ.get('MESONINTROSPECT')
> > -out = subprocess.run([*introspect.split(' '), '--installed'],
> > +out = subprocess.run([*shlex.split(introspect), '--installed'],
> >                        stdout=subprocess.PIPE, check=True).stdout
> >   for source, dest in json.loads(out).items():
> >       bundle_dest = destdir_join('qemu-bundle', dest)
>
> Please do NOT merge this. This will break Windows builds. I'm putting
> this patch on hold.
>
> The problem is that Meson uses a different logic for escaping arguments
> in MESONINTROSPECT on Windows. I'll wait till Meson maintainers figure
> out how MESONINTROSPECT should be used. For details, see:
> https://github.com/mesonbuild/meson/pull/12115#issuecomment-1675863266

Am I correct in understanding from
https://github.com/mesonbuild/meson/pull/12807
that the eventual resolution that Meson upstream decided was
to restore the behaviour that regardless of platform the right
way to split the file is shlex.split()?

If so, then I think we should resurrect and apply this patch,
since at the moment configuring QEMU fails if, for instance,
the build tree directory name has a '~' character in it.

thanks
-- PMM