Merge pull request #538 from RonnyPfannschmidt/fix-537-drop-node-date…

…-on-old-git

drop node_date on old git

CHANGELOG.rst

@@ -1,3 +1,8 @@
+v6.0.1
+=======
+
+*  fix #537: drop node_date on old git to avoid errors on missing %cI
+
 v6.0.0
 ======
 

src/setuptools_scm/git.py

@@ -61,6 +61,9 @@ def get_head_date(self):
             return
         # TODO, when dropping python3.6 use fromiso
         date_part = timestamp.split("T")[0]
+        if "%c" in date_part:
+            trace("git too old -> timestamp is ", timestamp)
+            return None
         return datetime.strptime(date_part, r"%Y-%m-%d").date()
 
     def is_shallow(self):

testing/test_git.py

@@ -8,7 +8,7 @@
 from os.path import join as opj
 from setuptools_scm.file_finder_git import git_find_files
 from datetime import date
-
+from unittest.mock import patch, Mock
 
 pytestmark = pytest.mark.skipif(
     not has_command("git", warn=False), reason="git executable not found"
@@ -307,3 +307,12 @@ def parse_date():
     assert git_wd.get_head_date() == today
     meta = git.parse(os.fspath(wd.cwd))
     assert meta.node_date == today
+
+
+def test_git_getdate_badgit(
+    wd,
+):
+    wd.commit_testfile()
+    git_wd = git.GitWorkdir(os.fspath(wd.cwd))
+    with patch.object(git_wd, "do_ex", Mock(return_value=("%cI", "", 0))):
+        assert git_wd.get_head_date() is None