Sridhar Ratnakumar <sridh...@activestate.com> added the comment:
On 2010-06-14, at 10:43 AM, Lars Gustäbel wrote:
> Lars Gustäbel <l...@gustaebel.de> added the comment:
>
> a) The point is: the operation simply wouldn't fail on a case-sensitive
> filesystem. There is no platform-specific or otherwise special code in
> TarFile.makefile(). It simply tries to extract the file and the filesystem
> layer says no, because it believes there is already a directory with the same
> name. The same thing happens on a Windows filesystem BTW. The problem boils
> down to this:
>
>>>> os.mkdir("A")
>>>> open("a", "w")
> IOError: [Errno 21] Is a directory: 'a'
>
> And IIUC, the Mac OS X filesystem is case-preserving(!) by default, with the
> possibility to create new filesystems as case-sensitive. As I said, my Mac OS
> X expertise is almost nonexistent, you might as well ask someone with more
> knowledge on Python on Mac OS X.
Ah, I see. I didn't know about this compatibility quirk.
> b) I don't know what Finder does with that archive, but I cannot think of any
> other way than either not to extract the file at all or to extract it under a
> different name or to remove the directory first and then extract the file.
> Could you please examine how Finder extracts this archive?
I was wrong about Finder extracting the tarball; actually I used the Finder on
my macbook (10.6), where `open("a", "w")` succeeds. Whereas this issue seems to
be reproducible in 10.5 or 10.4 only.
I did try to use `tar` this time, and it failed:
$ tar zxf hntool-0.1.1.tar.gz
tar: hntool-0.1.1/hntool: Cannot open: File exists
tar: Error exit delayed from previous errors
> c) IMHO the IOError exception is perfectly fine, because this kind of issue
> is outside of tarfile's scope. We hit a filesystem limit here. Also, there is
> no decent way to work around this problem, and I think there is no need to
> either.
In this case, yes ... I agree.
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<http://bugs.python.org/issue8958>
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