fix pull to working repo in post-receive hook, probably

It would seem that codes run on behalf of the bare repo have $GIT_DIR='.',
which is not what we want when working on a non-bare repo.

diff --git a/provisioning/pelican_scheduler.py b/provisioning/pelican_scheduler.py
index 8882e56..8701227 100755 (executable)
--- a/provisioning/pelican_scheduler.py
+++ b/provisioning/pelican_scheduler.py
@@ -62,7 +62,12 @@ def schedule(command, when):
 
 def main():
     # sync our "working" repo with the bare one
-    subprocess.run(["git", "pull"], cwd=WORKING_REPO)
+
+    # but first, don't let the fact that this is running as a hook on the bare
+    # repo confuse us
+    our_env = os.environ.copy()
+    del our_env['GIT_DIR']
+    subprocess.run(["git", "pull"], cwd=WORKING_REPO, env=our_env)
 
     # look for scheduled future posts
     future_publication_times = get_future_publication_times()