[MacPorts] #61699: gdk-pixbuf2 @2.42.0 breaks py-gobject3

[MacPorts]

#61699: gdk-pixbuf2 @2.42.0 breaks py-gobject3
-----------------------+-------------------------
 Reporter:  fhgwright  |      Owner:  (none)
     Type:  defect     |     Status:  new
 Priority:  Normal     |  Milestone:
Component:  ports      |    Version:  2.6.4
 Keywords:             |       Port:  gdk-pixbuf2
-----------------------+-------------------------
 There's some kind of a path screwup related to `libgdk_pixbuf-2.0.0.dylib`
 in the new `gdk-pixbuf2`, resulting in import failures from `py-jobject3`.
 This can be demonstrated as follows:

 With the previous version:

 {{{
 MacPro:~ fw$ port installed gdk-pixbuf2 | grep active
   gdk-pixbuf2 @2.40.0_1+x11 (active)
 MacPro:~ fw$ python -c 'import gi; from gi.repository import Gtk'
 -c:1: PyGIWarning: Gtk was imported without specifying a version first.
 Use gi.require_version('Gtk', '3.0') before import to ensure that the
 right version gets loaded.
 }}}

 (the warning is harmless for this purpose, and the `gi.require_version`
 call is omitted for simplicity)

 With the new version:

 {{{
 MacPro:~ fw$ port installed gdk-pixbuf2 | grep active
   gdk-pixbuf2 @2.42.0_0+x11 (active)
 MacPro:~ fw$ python -c 'import gi; from gi.repository import Gtk'

 ** (process:1685): WARNING **: 19:59:36.238: Failed to load shared library
 'libgdk_pixbuf-2.0.0.dylib' referenced by the typelib:
 dlopen(libgdk_pixbuf-2.0.0.dylib, 9): image not found
 Traceback (most recent call last):
   File "<string>", line 1, in <module>
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7
 /site-packages/gi/importer.py", line 145, in load_module
     importlib.import_module('gi.repository.' + dep.split("-")[0])
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py",
 line 37, in import_module
     __import__(name)
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7
 /site-packages/gi/importer.py", line 145, in load_module
     importlib.import_module('gi.repository.' + dep.split("-")[0])
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py",
 line 37, in import_module
     __import__(name)
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7
 /site-packages/gi/importer.py", line 146, in load_module
     dynamic_module = load_overrides(introspection_module)
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7
 /site-packages/gi/overrides/__init__.py", line 118, in load_overrides
     override_mod = importlib.import_module(override_package_name)
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py",
 line 37, in import_module
     __import__(name)
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7
 /site-packages/gi/overrides/GdkPixbuf.py", line 32, in <module>
     class Pixbuf(GdkPixbuf.Pixbuf):
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7
 /site-packages/gi/overrides/__init__.py", line 195, in override
     assert g_type != TYPE_NONE
 AssertionError
 }}}

 The exact error messages vary with the Python version, but the effect is
 the same.

 Some poking around with `dtruss` indicates that the problem is that it's
 trying to load `libgdk_pixbuf-2.0.0.dylib` instead of
 `/opt/local/lib/libgdk_pixbuf-2.0.0.dylib`.  In fact, it works if one is
 currently in the `/opt/local/lib` directory:

 {{{
 MacPro:~ fw$ cd /opt/local/lib
 MacPro:lib fw$ port installed gdk-pixbuf2 | grep active
   gdk-pixbuf2 @2.42.0_0+x11 (active)
 MacPro:lib fw$ python -c 'import gi; from gi.repository import Gtk'
 -c:1: PyGIWarning: Gtk was imported without specifying a version first.
 Use gi.require_version('Gtk', '3.0') before import to ensure that the
 right version gets loaded.
 }}}

 This does ''not'' seem to be a simple install-name issue:

 {{{
 MacPro:~ fw$ otool -L /opt/local/lib/libgdk_pixbuf-2.0.0.dylib
 /opt/local/lib/libgdk_pixbuf-2.0.0.dylib:
         /opt/local/lib/libgdk_pixbuf-2.0.0.dylib (compatibility version
 4201.0.0, current version 4201.0.0)
         /opt/local/lib/libintl.8.dylib (compatibility version 10.0.0,
 current version 10.5.0)
         /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current
 version 1197.1.1)
         /opt/local/lib/libglib-2.0.0.dylib (compatibility version
 5801.0.0, current version 5801.3.0)
         /opt/local/lib/libgobject-2.0.0.dylib (compatibility version
 5801.0.0, current version 5801.3.0)
         /opt/local/lib/libgmodule-2.0.0.dylib (compatibility version
 5801.0.0, current version 5801.3.0)
         /opt/local/lib/libgio-2.0.0.dylib (compatibility version 5801.0.0,
 current version 5801.3.0)
 }}}

 This is all from 10.9.5, but the same symptom is present in 10.13.6 (and
 probably others).

-- 
Ticket URL: <https://trac.macports.org/ticket/61699>
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