Fix missing error constants in libvirt python module

The previous change to the generator, changed too much - only
the functions are in 'virerror.c', the constants remained in
'virerror.h' which could not be renamed for API compat reasons.

Add a test case to sanity check the generated python bindings

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
(cherry picked from commit 25ea8e47e7)

python/Makefile.am

@@ -119,6 +119,11 @@ $(libvirtmod_la_OBJECTS): $(GENERATED)
 $(libvirtmod_qemu_la_OBJECTS): $(QEMU_GENERATED)
 $(libvirtmod_lxc_la_OBJECTS): $(LXC_GENERATED)
 
+EXTRA_DIST += sanitytest.py
+
+check-local:
+	$(AM_V_GEN)PYTHONPATH=$(abs_topbuilddir):$(abs_topbuilddir)/.libs $(PYTHON) $(srcdir)/sanitytest.py
+
 install-data-local:
 	$(mkinstalldirs) $(DESTDIR)$(pyexecdir)
 	$(INSTALL) -m 0644 libvirt.py $(DESTDIR)$(pyexecdir)

python/generator.py

@@ -122,8 +122,9 @@ class docParser(xml.sax.handler.ContentHandler):
                 if attrs.has_key('field'):
                     self.function_return_field = attrs['field']
         elif tag == 'enum':
+            # enums come from header files, hence virterror.h
             if (attrs['file'] == "libvirt" or
-                attrs['file'] == "virerror"):
+                attrs['file'] == "virterror"):
                 enum(attrs['type'],attrs['name'],attrs['value'])
             elif attrs['file'] == "libvirt-lxc":
                 lxc_enum(attrs['type'],attrs['name'],attrs['value'])
@@ -134,6 +135,7 @@ class docParser(xml.sax.handler.ContentHandler):
         if debug:
             print "end %s" % tag
         if tag == 'function':
+            # fuctions come from source files, hence 'virerror.c'
             if self.function != None:
                 if (self.function_module == "libvirt" or
                     self.function_module == "virevent" or

python/sanitytest.py

@@ -0,0 +1,31 @@
+#!/usr/bin/python
+
+import libvirt
+
+globals = dir(libvirt)
+
+# Sanity test that the generator hasn't gone wrong
+
+# Look for core classes
+assert("virConnect" in globals)
+assert("virDomain" in globals)
+assert("virDomainSnapshot" in globals)
+assert("virInterface" in globals)
+assert("virNWFilter" in globals)
+assert("virNodeDevice" in globals)
+assert("virNetwork" in globals)
+assert("virSecret" in globals)
+assert("virStoragePool" in globals)
+assert("virStorageVol" in globals)
+assert("virStream" in globals)
+assert("VIR_CONNECT_RO" in globals)
+
+# Error related bits
+assert("libvirtError" in globals)
+assert("VIR_ERR_AUTH_FAILED" in globals)
+assert("virGetLastError" in globals)
+
+# Some misc methods
+assert("virInitialize" in globals)
+assert("virEventAddHandle" in globals)
+assert("virEventRegisterDefaultImpl" in globals)