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| Started by | Larry Martell <larry.martell@gmail.com> |
|---|---|
| First post | 2016-03-04 07:18 -0500 |
| Last post | 2016-03-04 07:18 -0500 |
| Articles | 1 — 1 participant |
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Re: creating zipfile with symlinks Larry Martell <larry.martell@gmail.com> - 2016-03-04 07:18 -0500
| From | Larry Martell <larry.martell@gmail.com> |
|---|---|
| Date | 2016-03-04 07:18 -0500 |
| Subject | Re: creating zipfile with symlinks |
| Message-ID | <mailman.185.1457093980.20602.python-list@python.org> |
On Thu, Mar 3, 2016 at 10:32 PM, Larry Martell <larry.martell@gmail.com> wrote: > On Thu, Mar 3, 2016 at 4:58 PM, Chris Angelico <rosuav@gmail.com> wrote: >> On Fri, Mar 4, 2016 at 8:38 AM, MRAB <python@mrabarnett.plus.com> wrote: >>> Is it even possible to zip a link? >>> >>> A quick search came up with this: >>> >>> Are hard links possible within a zip archive? >>> http://stackoverflow.com/questions/8859616/are-hard-links-possible-within-a-zip-archive >> >> Hard links are different. Symlinks are files containing the target >> filename, with a special mode bit set. I'm not sure if it's a standard >> feature of all zip archivers, but on my Debian system, I can use "zip >> --symlinks" to create such a zip. How that will unzip on a system that >> doesn't understand symlinks, I don't know. >> >> rosuav@sikorsky:~/tmp$ ls -l >> total 4 >> -rw-r--r-- 1 rosuav rosuav 162 Mar 4 08:48 aaa.zip >> lrwxrwxrwx 1 rosuav rosuav 4 Mar 4 08:49 qwer -> asdf >> rosuav@sikorsky:~/tmp$ unzip -l aaa.zip >> Archive: aaa.zip >> Length Date Time Name >> --------- ---------- ----- ---- >> 4 2016-03-04 08:45 qwer >> --------- ------- >> 4 1 file >> >> >> That's a broken symlink (there is no "asdf" in the directory), and zip >> and unzip are both fine with that. >> >> Now, how the Python zipfile module handles this, I don't know. The >> ZipInfo shows a file mode of 'lrwxrwxrwx', but when I call extract(), >> it comes out as a regular file. You might have to do some work >> manually, or else just drop to an external command with --symlinks. > > Thanks. That's what I ended up doing. Unfortunately very slow - around 8 minutes to zip a 7GB dir using the command line zip vs. 13 seconds with the python zipfile module.
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