add python syntax checker

CMakeLists.txt

@@ -1267,6 +1267,7 @@ if(CMAKE_COMPILER_IS_GNUCXX OR MINGW)
     )
 endif(CMAKE_COMPILER_IS_GNUCXX OR MINGW)
 
+
 # Print message to start build process
 if (${CMAKE_BUILD_TOOL} MATCHES "make")
     MESSAGE("=======================================\n"

src/Mod/Test/CMakeLists.txt

@@ -13,6 +13,7 @@ SET(Test_SRCS
     unittestgui.py
     InitGui.py
     testmakeWireString.py
+    TestPythonSyntax.py
 )
 SOURCE_GROUP("" FILES ${Test_SRCS})
 

src/Mod/Test/TestApp.py

@@ -73,7 +73,8 @@ def All():
                "TestPartDesignApp",
                "TestSpreadsheet",
                "TestTechDrawApp",
-               "TestPathApp" ]
+               "TestPathApp",
+               "TestPythonSyntax"]
 
     # gui tests of modules
     if (FreeCAD.GuiUp == 1):

src/Mod/Test/TestPythonSyntax.py

@@ -0,0 +1,41 @@
+import sys
+import os
+import ast
+import unittest
+import FreeCAD as App
+
+def test_python_syntax(rootdir, whitelist=None):
+    whitelist = whitelist or []
+    log = []
+    for sub_dir, dirs, files in os.walk(rootdir):
+        for fn in files:
+            if (not fn in whitelist) and os.path.splitext(fn)[1] == '.py':
+                with open(os.path.join(sub_dir, fn), encoding='utf-8') as py_file:
+                    try:
+                        ast.parse(py_file.read())
+                    except SyntaxError:
+                        log.append(os.path.join(sub_dir, fn))
+    message = "\n\n" + "#" * 30 + "\n"
+    message += "{} python files are not parseable:\n\n".format(len(log))
+    for i in log:
+        message += i + "\n"
+    message += "#" * 30 + "\n\n"
+    if log:
+        raise RuntimeError("there are some files not parse-able with the used python-interpreter" + message)
+    else:
+        return
+
+
+class PythonSyntaxTestCase(unittest.TestCase):
+    """
+    Test Case to test python syntax of all python files in FreeCAD
+    """
+    def setUp(self):
+        self.whitelist = []
+        self.whitelist += ["automotive_design.py"]
+        self.whitelist += ["ifc2x3.py"]
+        self.whitelist += ["ifc4.py"]
+        
+
+    def testAll(self):
+        test_python_syntax(App.getHomePath(), self.whitelist)