[Buildbot] #2885: Windows: rmdirRecursive() fails if a contained files is opened

[Buildbot trac]

#2885: Windows: rmdirRecursive() fails if a contained files is opened
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Reporter:  dl      |      Owner:
    Type:  defect  |     Status:  new
Priority:  major   |  Milestone:  undecided
 Version:  0.8.9   |   Keywords:  windows
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 rmdirRecursive() for runtime.platformType == 'win32' assumes (and
 requires), that after a successful os.remove(file_path) no file with path
 file_path exists (as long as it is not recreated by an other process).
 In fact, this is not guaranteed on Windows:
 http://www.osronline.com/article.cfm?article=245.

 In our environment, rmdirRecursive() in the context of a SVN checkout
 ("clobber") quite often failed (about every third time), probably due to
 files temporarily opened by the installed antivirus suite:
 exceptions.WindowsError: [Error 145] Das Verzeichnis ist nicht leer.

 The only solution I could find, is to try several times after some seconds
 of waiting, ignoring this errors at every try except the last one.

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Ticket URL: <http://trac.buildbot.net/ticket/2885>
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