Added searching methods for freecad libraries

src/freecad_to_gazebo/__init__.py

@@ -0,0 +1,32 @@
+#!/usr/bin/env python3
+
+import os
+
+# check os types to search for freecad libraries
+if 'posix' in os.name:
+    # TODO: Test the result of os.name in different systems
+    _so = os.popen('which freecad')
+    FREECAD_PATH = _so.readline().replace('\n', '')
+    if not FREECAD_PATH:
+        _so.close()
+        _so = os.popen('which FreeCAD')
+        FREECAD_PATH = _so.readline().replace('\n', '')
+        _so.close()
+
+    FREECAD_PATH = FREECAD_PATH.replace('bin', 'lib')
+
+    if not FREECAD_PATH:
+        raise ModuleNotFoundError('FreeCAD not installed.')
+
+elif 'nt' in os.name:
+    # TODO: Find freecad libs on windows
+    pass
+else:
+    raise Exception("Platform not supported")
+
+# Extend sys.path to include freecad python libraries (including workbenches)
+os.sys.path.extend(d.path for d in os.scandir(FREECAD_PATH))
+
+from .exporter import export
+from .model import *
+