Normalize debugger temp file paths on Windows

Author: kycutler

ipykernel/compiler.py

@@ -39,8 +39,14 @@ def murmur2_x86(data, seed):
 
 def get_tmp_directory():
     tmp_dir = tempfile.gettempdir()
+    if os.name == 'nt':
+        try:
+            import win32file
+            tmp_dir = win32file.GetLongPathName(tmp_dir)
+        except:
+            pass
     pid = os.getpid()
-    return tmp_dir + '/ipykernel_' + str(pid)
+    return tmp_dir + os.sep + 'ipykernel_' + str(pid)
 
 
 def get_tmp_hash_seed():
@@ -52,7 +58,7 @@ def get_file_name(code):
     cell_name = os.environ.get("IPYKERNEL_CELL_NAME")
     if cell_name is None:
         name = murmur2_x86(code, get_tmp_hash_seed())
-        cell_name = get_tmp_directory() + '/' + str(name) + '.py'
+        cell_name = get_tmp_directory() + os.sep + str(name) + '.py'
     return cell_name
 
 

ipykernel/debugger.py

@@ -507,7 +507,7 @@ async def debugInfo(self, message):
                 'isStarted': self.is_started,
                 'hashMethod': 'Murmur2',
                 'hashSeed': get_tmp_hash_seed(),
-                'tmpFilePrefix': get_tmp_directory() + '/',
+                'tmpFilePrefix': get_tmp_directory() + os.sep,
                 'tmpFileSuffix': '.py',
                 'breakpoints': breakpoint_list,
                 'stoppedThreads': self.stopped_threads,

setup.py

@@ -69,6 +69,7 @@ def run(self):
         'matplotlib-inline>=0.1.0,<0.2.0',
         'appnope;platform_system=="Darwin"',
         'nest_asyncio',
+        'pywin32;platform_system=="Windows"'
     ],
     extras_require={
         "test": [