Re: Can not recreate GIR information from gir1.2-harfbuzz-0.0.typelib

Hi James and All,

On Sun, 2023-06-04 at 14:18 +0100, James Addison wrote:
> Hi Abou,
> 
> Please find some slightly re-ordered responses below, and with the
> gtk-gnome list and bug on cc because others are likely to know more
> than me about this.
Thank you for looking on this so quickly.
> 
> On Sat, 3 Jun 2023 at 22:40, Abou Al Montacir <[email protected]> wrote:
> ...
> > However, when starting the conversion, g-ir-generate crashes with an error
> > on HarfBuzz-0.0.
> > I've raised a ticket
> > https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1035669 to that package,
> > but I'm not sure it is an issue in HarfBuzz itself, and maybe it is in g-ir-
> > generate itself.
> 
> I'd begun looking into the problem - it seems that the g-ir-generate
> tool determines that the HB_LANGUAGE_INVALID constant (zero) is a GTK
> 'interface'[1] type instead of a basic type (such as int, utf8, ...).
> That causes the XML gir serialization failure here[2], because the
> interface type isn't supported.
> 
> > Few weeks ago, I started adding support for Gtk3 in FPC and Lazarus as part
> > of the effort to close bugs related to the deprecation of Gtk2.
> > My goal was to be able to build binding units (pascal modules) from .typelib
> > files shipped by Debian.
> > In order to be able to do that, I use a tool called gir2pas that I'm
> > maintaining.
> > I've added support for on the fly converting .typelib files using g-ir-
> > generate.
> 
> While developing a patch I'd found it difficult to figure out what the
> effect of my changes were on the output .typelib binary file.  In
> fact, I filed
> https://salsa.debian.org/reproducible-builds/diffoscope/-/issues/341
> as a feature request for diffoscope.  Would any of the code from
> gir2pas be helpful to mention there?
I intend to make gir2pas the standard way to interface Gtk-X libs with Free
Pascal compiler.
So, feel free to mention it there.
gir2pas code is located
here: https://gitlab.com/freepascal.org/lazarus/lazarus/-/tree/main/tools/gir2pascal
Code generated (with still some manual tweaks for
now): https://gitlab.com/freepascal.org/lazarus/lazarus/-/tree/main/lcl/interfaces/gtk3/gtk3bindings
> 
> > The reason I'm write to debian-devel is to know if we want to enforce the
> > fact that typelib files shall be able to regenerate gir files for Bookworm.
> > If this is the case, shall I raise severity to be release critical?
> 
> What's the impact of the inability to generate the XML gir files for
> gir1.2-harfbuzz on other packages?
Not sure there is any impact if we can get gir file from -dev packages as Simon
stated in his answer.
> 
> Thanks,
> James
> 
> [1] -
> https://gitlab.gnome.org/GNOME/gobject-introspection/-/blob/37bde613a7cb77e7399dafb25731e13208f0ae0b/girepository/gitypes.h#L410
> 
> [2] -
> https://gitlab.gnome.org/GNOME/gobject-introspection/-/blob/37bde613a7cb77e7399dafb25731e13208f0ae0b/girepository/girwriter.c#L784
> 
Thank you for these pointers. It helps understanding the issue.
-- 
Cheers,
Abou Al Montacir

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