Add run-time import hook for PyOpenGL

git-svn-id: http://svn.pyinstaller.org/trunk@218 8dd32b29-ccff-0310-8a9a-9233e24343b1

doc/CHANGES.txt

@@ -9,6 +9,7 @@ Current changes since PyInstaller 1.0
    the encodings are automatically found and included, so this problem should
    be gone forever.
  + Add import hook for GTK.
+ + Add import hook for PyOpenGL.
  + Add import hook for dnspython (tested with 1.3.4)
  + Add import hook for KInterbasDB  (courtesy of Eugene Prigorodov)
  + (Windows) Make single-file packages not depend on MSVCRT71.DLL anymore,

rthooks.dat

@@ -2,4 +2,5 @@
     'pythoncom':  ['support/rthooks/versioneddll.py'],
     'pywintypes': ['support/rthooks/versioneddll.py'],
     'win32com':   ['support/rthooks/win32comgenpy.py'],
+    'OpenGL':     ['support/rthooks/opengl.py'],
 }

support/rthooks/opengl.py

@@ -0,0 +1,48 @@
+# Copyright (C) 2005, Giovanni Bajo
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# In addition to the permissions in the GNU General Public License, the
+# authors give you unlimited permission to link or embed the compiled
+# version of this file into combinations with other programs, and to
+# distribute those combinations without any restriction coming from the
+# use of this file. (The General Public License restrictions do apply in
+# other respects; for example, they cover modification of the file, and
+# distribution when not linked into a combine executable.)
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+
+# PyOpenGL (specifically, OpenGL.__init__) reads a "version" text file
+# containing the version number to export it as OpenGL.__version__. When
+# packaging with PyInstaller, the 'version' file does not exist, and importing
+# PyOpenGL results in an IOError.
+# The (convoluted) solution is to override Python's builtin "open" with our
+# own function which detects when "version" is opened and returns some fake
+# content stream (through cStringIO).
+
+__realopen__ = open
+
+def myopen(fn, *args):
+    import os
+    lastdir = os.path.basename(os.path.dirname(fn))
+    if os.path.basename(fn) == "version" and os.path.splitext(lastdir)[1] == ".pyz":
+        import cStringIO
+        # Restore original open, since we're almost done
+        __builtins__.__dict__["open"] = __realopen__
+        # Report a fake revision number. Anything would do since it's not
+        # used by the library, but it needs to be made of four numbers
+        # separated by dots.
+        return cStringIO.StringIO("0.0.0.0")
+    return __realopen__(fn, *args)
+
+__builtins__.__dict__["open"] = myopen