Add a possibility to have full datetime entries in changelog

Fix #305

Unfortunatelly we need to use `pytz` instead of `datetime.timezone`
because of python2.

src/tito/tagger/main.py

@@ -68,7 +68,7 @@ class VersionTagger(ConfigObject):
                 self.spec_file_name)
         self.keep_version = keep_version
 
-        self.today = strftime("%a %b %d %Y")
+        self.today = self._changelog_date()
         (self.git_user, self.git_email) = self._get_git_user_info()
         git_email = self.git_email
         if git_email is None:
@@ -163,6 +163,12 @@ class VersionTagger(ConfigObject):
         print
         undo_tag(tag)
 
+    def _changelog_date(self):
+        option = (BUILDCONFIG_SECTION, "changelog_date_with_time")
+        if self.config.has_option(*option) and self.config.getboolean(*option):
+            return strftime("%a %b %d %T %Z %Y")
+        return strftime("%a %b %d %Y")
+
     def _changelog_remove_cherrypick(self, line):
         """
         remove text "(cherry picked from commit ..." from line unless

test/unit/tagger_tests.py

@@ -0,0 +1,38 @@
+import unittest
+import mock
+from datetime import datetime
+from tito.tagger import VersionTagger
+from tito.compat import PY2, RawConfigParser
+
+from unit import is_epel6
+if is_epel6:
+    import unittest2 as unittest
+else:
+    import unittest
+
+
+def strftime_mock(s):
+    if not PY2:
+        from datetime import timezone
+    tzinfo = None if PY2 else timezone.utc
+    someday = datetime(2020, 4, 22, 15, 2, tzinfo=tzinfo)
+    return someday.strftime(s)
+
+
+class TestVersionTagger(unittest.TestCase):
+    def setUp(self):
+        self.config = RawConfigParser()
+
+    @mock.patch("tito.tagger.main.strftime", strftime_mock)
+    def test_today(self):
+        tagger = VersionTagger(self.config)
+        assert tagger.today == "Wed Apr 22 2020"
+
+    @unittest.skipIf(PY2, "It is not trivial to represent timezone in python2 because"
+                          "datetime.timezone is python3 only and pytz is not in EPEL. This feature"
+                          "is for F27+ and EPEL8+ so we don't need to test it for python2")
+    @mock.patch("tito.tagger.main.strftime", strftime_mock)
+    def test_today_datetime(self):
+        self.config["buildconfig"] = {"changelog_date_with_time": True}
+        tagger = VersionTagger(self.config)
+        assert tagger.today == "Wed Apr 22 15:02:00 UTC 2020"

tito.props.5.asciidoc

@@ -69,6 +69,12 @@ changelog_do_not_remove_cherrypick::
 If set to 0, it will not remove from cherry picked commits the part "(cherry
 picked from commit ...)"
 
+changelog_date_with_time::
+By default, changelog dates don't contain time (e.g. Wed Nov 1 2017). When
+this option is set to `True`, changelog entries are generated in a datetime
+format (e.g. Wed Nov 1 11:08:13 EDT 2017). This feature requires RPM 4.14,
+therefore it is supported only on Fedora 27, EPEL8, openSUSE Leap 15 and higher.
+
 tag_suffix::
 An optional specification of a suffix to append to all tags created by tito
 for this repo. Can be useful for situations where one git repository is