From b12660f1a8adf6b1e0b5560d9c145ef519d5975c Mon Sep 17 00:00:00 2001
From: Markus Unterwaditzer <markus@unterwaditzer.net>
Date: Sat, 23 Jan 2016 11:56:24 +0100
Subject: [PATCH] Warn when running under Python 2

See #219
---
 tests/conftest.py             |  5 +++++
 tests/storage/dav/__init__.py |  6 +++++-
 vdirsyncer/cli/__init__.py    | 10 ++++++++++
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/tests/conftest.py b/tests/conftest.py
index 44de373..f233759 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -14,6 +14,11 @@ def setup_logging():
     click_log.basic_config('vdirsyncer').setLevel(logging.DEBUG)
 
 
+@pytest.fixture(autouse=True)
+def suppress_py2_warning(monkeypatch):
+    monkeypatch.setattr('vdirsyncer.cli._check_python2', lambda: None)
+
+
 try:
     import pytest_benchmark
 except ImportError:
diff --git a/tests/storage/dav/__init__.py b/tests/storage/dav/__init__.py
index 3c2a8f4..dd80b81 100644
--- a/tests/storage/dav/__init__.py
+++ b/tests/storage/dav/__init__.py
@@ -34,7 +34,11 @@ class DavStorageTests(ServerMixin, StorageTests):
 
         monkeypatch.setattr('requests.sessions.Session.request', breakdown)
 
-        assert list(s.get_multi([])) == []
+        try:
+            assert list(s.get_multi([])) == []
+        finally:
+            # Make sure monkeypatch doesn't interfere with DAV server teardown
+            monkeypatch.undo()
 
     def test_dav_unicode_href(self, s, get_item, monkeypatch):
         if self.dav_server != 'radicale':
diff --git a/vdirsyncer/cli/__init__.py b/vdirsyncer/cli/__init__.py
index eeb195d..2983c1e 100644
--- a/vdirsyncer/cli/__init__.py
+++ b/vdirsyncer/cli/__init__.py
@@ -8,6 +8,7 @@ import click
 import click_log
 
 from .. import __version__, log
+from ..utils.compat import PY2
 
 
 cli_logger = log.get(__name__)
@@ -61,6 +62,14 @@ def validate_verbosity(ctx, param, value):
     return x
 
 
+def _check_python2():
+    if PY2:
+        cli_logger.warning('Python 2 support will be dropped. Please switch '
+                           'to at least Python 3.3 as soon as possible. See '
+                           'https://github.com/untitaker/vdirsyncer/issues/219'
+                           ' for more information.')
+
+
 @click.group()
 @click_log.init('vdirsyncer')
 @click_log.simple_verbosity_option()
@@ -71,6 +80,7 @@ def app(ctx):
     '''
     vdirsyncer -- synchronize calendars and contacts
     '''
+    _check_python2()
     from .config import load_config
 
     if not ctx.config: