Re: deleting from tarfile

[Martin v. Löwis]

Mark McEahern wrote:
It doesn't appear so.  A workaround, of course, is to create a new file 
with the subset of files from the old file:
That is actually the *only* way to do that. tarfiles cannot be sparse,
in the sense that parts of the file can be marked as deleted. So in
order to delete a file, you have to copy the entire tarfile, and skip
the file you want to delete - whether you do this yourself, or whether
tarfile.py does it for you.
Regards,
Martin
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Re: deleting from tarfile

[Mark McEahern]

Uwe Mayer wrote:
Hi,
is it possible to delete a file from a tar-archive using the tarfile module?
Thanks
Uwe 
 

It doesn't appear so.  A workaround, of course, is to create a new file 
with the subset of files from the old file:

#!/usr/bin/env python
import tarfile
import os
def removeFile(filename, nameToDelete):
   Remove nameToDelete from tarfile filename.
   prefix, ext = os.path.splitext(filename)
   newFilename = '%(prefix)s-modified%(ext)s' % locals()
   original = tarfile.open(filename)
   modified = tarfile.open(newFilename, 'w')
   for info in original.getmembers():
   if info.name == nameToDelete:
   continue
   extracted = original.extractfile(info)
   if not extracted:
   continue
   modified.addfile(info, extracted)
   original.close()
   modified.close()
// m
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