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Fix and simplify conflict/overwrite detection.

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Signed-off-by: Daira Hopwood <daira@jacaranda.org>
This commit is contained in:
Daira Hopwood 2015-11-04 15:11:34 +00:00
parent 118a89e418
commit e2a3b5ff63
1 changed files with 12 additions and 13 deletions
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25
src/allmydata/frontends/magic_folder.py
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@ -717,21 +717,20 @@ class Downloader(QueueMixin, WriteFileMixin):
raise ConflictError("download failed: already conflicted: %r" % (relpath_u,))
d.addCallback(fail)
else:
is_conflict = False
pathinfo = get_pathinfo(abspath_u)
db_entry = self._db.get_db_entry(relpath_u)
dmd_last_downloaded_uri = metadata.get('last_downloaded_uri', None)
dmd_last_uploaded_uri = metadata.get('last_uploaded_uri', None)
if db_entry:
if dmd_last_downloaded_uri is not None and db_entry.last_downloaded_uri is not None:
if dmd_last_downloaded_uri != db_entry.last_downloaded_uri:
is_conflict = True
self._count('objects_conflicted')
elif dmd_last_uploaded_uri is not None and dmd_last_uploaded_uri != db_entry.last_uploaded_uri:
is_conflict = True
self._count('objects_conflicted')
elif self._is_upload_pending(relpath_u):
is_conflict = True
self._count('objects_conflicted')
# See <docs/proposed/magic-folder/remote-to-local-sync.rst#conflictoverwrite-decision-algorithm>.
is_conflict = ( not pathinfo.exists # 2a
or self._is_upload_pending(relpath_u) # 2c.i.
or (db_entry is None or is_new_file(pathinfo, db_entry)) # 2c.ii.
or (dmd_last_downloaded_uri is None or db_entry.last_uploaded_uri is None
or dmd_last_downloaded_uri != db_entry.last_uploaded_uri) # 2c.iii.
)
if is_conflict:
self._count('objects_conflicted')
if relpath_u.endswith(u"/"):
if metadata.get('deleted', False):