Blame SOURCES/BZ-1270784-checksum-prefix.patch

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commit 0904d34bc9286b903b79f8fc42afc3f7cb63a9ad
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Author: Valentina Mukhamedzhanova <vmukhame@redhat.com>
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Date:   Mon Jan 4 15:18:21 2016 +0100
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    Make sure filename doesn't already contain a checksum. BZ#1104840
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diff --git a/createrepo/utils.py b/createrepo/utils.py
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index b0d92ec..697728b 100644
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--- a/createrepo/utils.py
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+++ b/createrepo/utils.py
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@@ -18,6 +18,7 @@
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 import os
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 import os.path
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+import re
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 import sys
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 import bz2
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 import gzip
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@@ -173,6 +174,9 @@ def checksum_and_rename(fn_path, sumtype='sha256'):
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     csum = misc.checksum(sumtype, fn_path)
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     fn = os.path.basename(fn_path)
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     fndir = os.path.dirname(fn_path)
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+    fn_match = re.match(r'[0-9A-Fa-f]{32,128}-(.+)', fn)
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+    if fn_match:
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+        fn = fn_match.groups()[0]
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     csum_fn = csum + '-' + fn
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     csum_path = os.path.join(fndir, csum_fn)
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     os.rename(fn_path, csum_path)