Commits on Dec 24, 2020

1. Avoid zip extract racing condition by using read+write instead extract …

   Extract also creates the folder hierarchy, however we do not need that,
   the file itself being extracted to a temporary folder is good enough.
   Instead we read the content of the zip and then write it. The write is
   not locked but it's OK to update the same file multiple times given the
   update operation will not alter the content of the file. By not creating
   the folder hierarchy (default via extract) we no longer can run into the
   problem of two parallel extracts both trying to create the folder
   hierarchy without exists ok flag, and one must fail.
   
   Resolves psf#5223.
   
   Signed-off-by: Bernát Gábor <bgabor8@bloomberg.net>

   

   gaborbernat committed Dec 24, 2020
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