We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
PTVSD_LOG_DIR doesn't work with VS
No logs are generated even with the environment variable set. It looks like logging initialization is missing on the VS entry point (`debugger.py`).

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `src/ptvsd/debugger.py`
Content:
```
1 # Copyright (c) Microsoft Corporation. All rights reserved.
2 # Licensed under the MIT License. See LICENSE in the project root
3 # for license information.
4 
5 import sys
6 
7 from ptvsd._local import run_module, run_file, run_main
8 
9 
10 # TODO: not needed?
11 DONT_DEBUG = []
12 
13 LOCALHOST = 'localhost'
14 
15 RUNNERS = {
16     'module': run_module,  # python -m spam
17     'script': run_file,  # python spam.py
18     'code': run_file,  # python -c 'print("spam")'
19     None: run_file,  # catchall
20 }
21 
22 
23 def debug(filename, port_num, debug_id, debug_options, run_as,
24           _runners=RUNNERS, _extra=None, *args, **kwargs):
25     # TODO: docstring
26     if _extra is None:
27         _extra = sys.argv[1:]
28     address = (LOCALHOST, port_num)
29     try:
30         run = _runners[run_as]
31     except KeyError:
32         # TODO: fail?
33         run = _runners[None]
34     if _extra:
35         args = _extra + list(args)
36     kwargs.setdefault('singlesession', True)
37     run(address, filename, *args, **kwargs)
38 
39 
40 def run(filename, port_num, run_as,
41         *args, **kwargs):
42     address = (LOCALHOST, port_num)
43     run_main(address, filename, run_as, *args, **kwargs)
44
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/src/ptvsd/debugger.py b/src/ptvsd/debugger.py
--- a/src/ptvsd/debugger.py
+++ b/src/ptvsd/debugger.py
@@ -4,6 +4,7 @@
 
 import sys
 
+import ptvsd.log
 from ptvsd._local import run_module, run_file, run_main
 
 
@@ -22,7 +23,10 @@
 
 def debug(filename, port_num, debug_id, debug_options, run_as,
           _runners=RUNNERS, _extra=None, *args, **kwargs):
-    # TODO: docstring
+
+    ptvsd.log.to_file()
+    ptvsd.log.info('debug{0!r}', (filename, port_num, debug_id, debug_options, run_as))
+
     if _extra is None:
         _extra = sys.argv[1:]
     address = (LOCALHOST, port_num)
@@ -39,5 +43,9 @@
 
 def run(filename, port_num, run_as,
         *args, **kwargs):
+
+    ptvsd.log.to_file()
+    ptvsd.log.info('run{0!r}', (filename, port_num, run_as))
+
     address = (LOCALHOST, port_num)
     run_main(address, filename, run_as, *args, **kwargs)

{"golden_diff": "diff --git a/src/ptvsd/debugger.py b/src/ptvsd/debugger.py\n--- a/src/ptvsd/debugger.py\n+++ b/src/ptvsd/debugger.py\n@@ -4,6 +4,7 @@\n \n import sys\n \n+import ptvsd.log\n from ptvsd._local import run_module, run_file, run_main\n \n \n@@ -22,7 +23,10 @@\n \n def debug(filename, port_num, debug_id, debug_options, run_as,\n           _runners=RUNNERS, _extra=None, *args, **kwargs):\n-    # TODO: docstring\n+\n+    ptvsd.log.to_file()\n+    ptvsd.log.info('debug{0!r}', (filename, port_num, debug_id, debug_options, run_as))\n+\n     if _extra is None:\n         _extra = sys.argv[1:]\n     address = (LOCALHOST, port_num)\n@@ -39,5 +43,9 @@\n \n def run(filename, port_num, run_as,\n         *args, **kwargs):\n+\n+    ptvsd.log.to_file()\n+    ptvsd.log.info('run{0!r}', (filename, port_num, run_as))\n+\n     address = (LOCALHOST, port_num)\n     run_main(address, filename, run_as, *args, **kwargs)\n", "issue": "PTVSD_LOG_DIR doesn't work with VS\nNo logs are generated even with the environment variable set. It looks like logging initialization is missing on the VS entry point (`debugger.py`).\n", "before_files": [{"content": "# Copyright (c) Microsoft Corporation. All rights reserved.\n# Licensed under the MIT License. See LICENSE in the project root\n# for license information.\n\nimport sys\n\nfrom ptvsd._local import run_module, run_file, run_main\n\n\n# TODO: not needed?\nDONT_DEBUG = []\n\nLOCALHOST = 'localhost'\n\nRUNNERS = {\n    'module': run_module,  # python -m spam\n    'script': run_file,  # python spam.py\n    'code': run_file,  # python -c 'print(\"spam\")'\n    None: run_file,  # catchall\n}\n\n\ndef debug(filename, port_num, debug_id, debug_options, run_as,\n          _runners=RUNNERS, _extra=None, *args, **kwargs):\n    # TODO: docstring\n    if _extra is None:\n        _extra = sys.argv[1:]\n    address = (LOCALHOST, port_num)\n    try:\n        run = _runners[run_as]\n    except KeyError:\n        # TODO: fail?\n        run = _runners[None]\n    if _extra:\n        args = _extra + list(args)\n    kwargs.setdefault('singlesession', True)\n    run(address, filename, *args, **kwargs)\n\n\ndef run(filename, port_num, run_as,\n        *args, **kwargs):\n    address = (LOCALHOST, port_num)\n    run_main(address, filename, run_as, *args, **kwargs)\n", "path": "src/ptvsd/debugger.py"}], "after_files": [{"content": "# Copyright (c) Microsoft Corporation. All rights reserved.\n# Licensed under the MIT License. See LICENSE in the project root\n# for license information.\n\nimport sys\n\nimport ptvsd.log\nfrom ptvsd._local import run_module, run_file, run_main\n\n\n# TODO: not needed?\nDONT_DEBUG = []\n\nLOCALHOST = 'localhost'\n\nRUNNERS = {\n    'module': run_module,  # python -m spam\n    'script': run_file,  # python spam.py\n    'code': run_file,  # python -c 'print(\"spam\")'\n    None: run_file,  # catchall\n}\n\n\ndef debug(filename, port_num, debug_id, debug_options, run_as,\n          _runners=RUNNERS, _extra=None, *args, **kwargs):\n\n    ptvsd.log.to_file()\n    ptvsd.log.info('debug{0!r}', (filename, port_num, debug_id, debug_options, run_as))\n\n    if _extra is None:\n        _extra = sys.argv[1:]\n    address = (LOCALHOST, port_num)\n    try:\n        run = _runners[run_as]\n    except KeyError:\n        # TODO: fail?\n        run = _runners[None]\n    if _extra:\n        args = _extra + list(args)\n    kwargs.setdefault('singlesession', True)\n    run(address, filename, *args, **kwargs)\n\n\ndef run(filename, port_num, run_as,\n        *args, **kwargs):\n\n    ptvsd.log.to_file()\n    ptvsd.log.info('run{0!r}', (filename, port_num, run_as))\n\n    address = (LOCALHOST, port_num)\n    run_main(address, filename, run_as, *args, **kwargs)\n", "path": "src/ptvsd/debugger.py"}]}