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roster: improve saving safety

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rr-
2018-11-05 22:53:52 +01:00
parent e5361b2830
commit e1eb99d7bd
1 changed files with 7 additions and 2 deletions
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pqcli/roster.py
+7 -2
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@@ -20,5 +20,10 @@ class Roster:
return Roster(real_path, players=[])
def save(self) -> None:
self.path.parent.mkdir(parents=True, exist_ok=True)
self.path.write_bytes(pickle.dumps(self.players))
old_path = self.path.with_name(self.path.name + ".old")
tmp_path = self.path.with_name(self.path.name + ".new")
tmp_path.parent.mkdir(parents=True, exist_ok=True)
tmp_path.write_bytes(pickle.dumps(self.players))
if self.path.exists():
self.path.rename(old_path)
tmp_path.rename(self.path)