c:\Program Files\Unity\Editor\Data\Tools\Unity-BlenderToFBX.py

blender249 = True

try: import Blender
except:
   blender249 = False
   import bpy   

if blender249:
   try: import export_fbx
   except:
    print('error: export_fbx not found.')
    Blender.Quit()
else:
   try: import io_scene_fbx.export_fbx
   except:
    print('error: io_scene_fbx.export_fbx not found.')
    # This might need to be bpy.Quit()
    raise

# Find the Blender output file
import os
outfile = os.getenv("UNITY_BLENDER_EXPORTER_OUTPUT_FILE")

# Do the conversion
print("Starting blender to FBX conversion " + outfile)

if blender249:
   export_fbx.write(outfile,
   EXP_OBS_SELECTED=False,
   EXP_MESH=True,
   EXP_MESH_APPLY_MOD=True,
   EXP_MESH_HQ_NORMALS=True,
   EXP_ARMATURE=True,
   EXP_LAMP=True,
   EXP_CAMERA=True,
   EXP_EMPTY=True,
   EXP_IMAGE_COPY=False,
   ANIM_ENABLE=True,
   ANIM_OPTIMIZE=False,
   ANIM_ACTION_ALL=True,
   GLOBAL_MATRIX = Blender.Mathutils.RotationMatrix( -90, 4, 'x' ),\
   )
else:
   import math
   from mathutils import Matrix
   # -90 degrees
   mtx4_x90n = Matrix.Rotation(-math.pi / 2.0, 4, 'X')
     
   class FakeOp:
    def report(self, tp, msg):
     print("%s: %s" % (tp, msg))
     
   io_scene_fbx.export_fbx.save(FakeOp(), bpy.context, filepath=outfile,
                  GLOBAL_MATRIX=mtx4_x90n,
                  use_selection=False,
                  # context_objects=None,
                  # object_types={'EMPTY', 'ARMATURE', 'MESH'},
                  EXP_MESH=True,
                  EXP_ARMATURE=True,
                  EXP_EMPTY=True,
                  EXP_MESH_APPLY_MOD=True,
                  # mesh_smooth_type='FACE',
                  EXP_LAMP=False,
                  EXP_CAMERA=False,
                  ANIM_ENABLE=True,
                  ANIM_OPTIMIZE=False,
                  ANIM_OPTIMIZE_PRECISSION=6,
                  ANIM_ACT   ION_ALL=True,
                  batch_mode='OFF',
                  # path_mode='AUTO',
                  BATCH_OWN_DIR=False,
                  use_metadata=True)

print("Finished blender to FBX conversion " + outfile)

blender249 = True

try: import Blender
except:
     blender249 = False
     import bpy     

if blender249:
     try: import export_fbx
     except:
         print('error: export_fbx not found.')
         Blender.Quit()
else:
     try: import io_scene_fbx.export_fbx
     except:
         print('error: io_scene_fbx.export_fbx not found.')
         # This might need to be bpy.Quit()
         raise

# Find the Blender output file
import os
outfile = os.getenv("UNITY_BLENDER_EXPORTER_OUTPUT_FILE")

# Do the conversion
print("Starting blender to FBX conversion " + outfile)

if blender249:
     mtx4_x90n = Blender.Mathutils.RotationMatrix(-90, 4, 'x')
     export_fbx.write(outfile,
         EXP_OBS_SELECTED=False,
         EXP_MESH=True,
         EXP_MESH_APPLY_MOD=True,
         EXP_MESH_HQ_NORMALS=True,
         EXP_ARMATURE=True,
         EXP_LAMP=True,
         EXP_CAMERA=True,
         EXP_EMPTY=True,
         EXP_IMAGE_COPY=False,
         ANIM_ENABLE=True,
         ANIM_OPTIMIZE=False,
         ANIM_ACTION_ALL=True,
         GLOBAL_MATRIX=mtx4_x90n)
else:
     # blender 2.58 or newer
     import math
     from mathutils import Matrix
     # -90 degrees
     mtx4_x90n = Matrix.Rotation(-math.pi / 2.0, 4, 'X')
      
     print("moo")
      
     class FakeOp:
         def report(self, tp, msg):
             print("%s: %s" % (tp, msg))
      
     exportObjects = ['ARMATURE', 'EMPTY', 'MESH']
          
     minorVersion = bpy.app.version[1];     
     if minorVersion <= 58:
         # 2.58
         io_scene_fbx.export_fbx.save(FakeOp(), bpy.context, filepath=outfile,
             global_matrix=mtx4_x90n,
             use_selection=False,
             object_types=exportObjects,
             mesh_apply_modifiers=True,
             ANIM_ENABLE=True,
             ANIM_OPTIMIZE=False,
             ANIM_OPTIMIZE_PRECISSION=6,
             ANIM_ACTION_ALL=True,
             batch_mode='OFF',     
             BATCH_OWN_DIR=False)
     else:
         # 2.59 and later
         io_scene_fbx.export_fbx.save(FakeOp(), bpy.context, filepath=outfile,
             global_matrix=mtx4_x90n,
             use_selection=False,
             object_types=exportObjects,
             use_mesh_modifiers=True,
             use_anim=True,
             use_anim_optimize=False,
             anim_optimize_precission=6,
             use_anim_action_all=True,
             batch_mode='OFF',
             use_batch_own_dir=False)
     # HQ normals are not supported in the current exporter

print("Finished blender to FBX conversion " + outfile)