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-rw-r--r--tools/cache.py7
1 files changed, 6 insertions, 1 deletions
diff --git a/tools/cache.py b/tools/cache.py
index c316a1fd..ed4fcd24 100644
--- a/tools/cache.py
+++ b/tools/cache.py
@@ -13,8 +13,13 @@ class Cache:
self.debug = debug
def ensure(self):
- if not os.path.exists(self.dirname):
+ try:
+ # Use makedirs here, so creating the path is as atomic as possible
os.makedirs(self.dirname)
+ except os.error, e:
+ # Ignore error for already existing dirname
+ if not os.path.exists(self.dirname):
+ raise e
def erase(self):
tempfiles.try_delete(self.dirname)