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Re: gobject-introspection .gir search path

From: Ludovic Courtès
Subject: Re: gobject-introspection .gir search path
Date: Tue, 06 May 2014 23:11:54 +0200
User-agent: Gnus/5.130009 (Ma Gnus v0.9) Emacs/24.3 (gnu/linux)

Cyril Roelandt <address@hidden> skribis:

> On 05/06/2014 10:07 AM, Ludovic Courtès wrote:
>> Cyril Roelandt <address@hidden> skribis:
>>> On 05/06/2014 12:36 AM, Ludovic Courtès wrote:
>>>> While trying to package librsvg, I stumbled upon this:
>>>> --8<---------------cut here---------------start------------->8---
>>>> Couldn't find include 'GdkPixbuf-2.0.gir' (search path: ['.', 'gir-1.0', 
>>>> '/gnu/store/xdd5ndl01700w23z206nc36nqg96z94v-gobject-introspection-1.38.0/share/gir-1.0',
>>>>  '/usr/share/gir-1.0', 
>>>> '/gnu/store/xdd5ndl01700w23z206nc36nqg96z94v-gobject-introspection-1.38.0/share/gir-1.0'])
>>>> /gnu/store/xdd5ndl01700w23z206nc36nqg96z94v-gobject-introspection-1.38.0/share/gobject-introspection-1.0/Makefile.introspection:153:
>>>>  recipe for target 'Rsvg-2.0.gir' failed
>>>> make[2]: *** [Rsvg-2.0.gir] Error 1
>>>> --8<---------------cut here---------------end--------------->8---
>>>> Do you remember if the gobject-introspection “scanner” had a way to
>>>> specify a search path, like an env. var.?
>>>> Otherwise, how can we make sure that the .girs of inputs are visible?
>>> Look at the 'gir-directory' function in guix/build/gnome.scm. It's used
>>> in gnu/packages/{gtk,gnome}.scm and does exactly what you need.
>> Oh right, thanks, that does the job.
>> It’d be great to submit a patch upstream so that g-ir-compiler &
>> co. honor a GIR_PATH environment variable or similar.  That seems like
>> the right thing to do, and definitely helpful for us.
> From 'man g-ir-scanner':
> "The g-ir-scanner uses the XDG_DATA_DIRS variable to check for dirs, the
> girs are located in XDG_DATA_DIRS/gir-1.0."
> I guess you could also use that; would it solve your problem ? I think
> we might be able to remove the ugly use of '--add-include-path' in
> gnu/packages/{gtk,gnome}.scm if we were to use this variable.

Indeed, adding a search path specification for ‘XDG_DATA_DIRS’ in GLib
solves this problem (I’ll commit shortly.)

Since ‘XDG_DATA_DIRS’ is also used as the search path env. var. for
GLib’s schemas, it seemed best to put it in GLib rather than


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