[arch-general] Re: Unzip archive in which are multiple sub zip archiers?

Maarten de Vries maarten at de-vri.es
Fri Apr 17 20:46:09 UTC 2015

On 04/17/2015 10:34 PM, Maarten de Vries wrote:
> On 04/17/2015 10:19 PM, Christian Demsar wrote:
>> http://pastebin.com/YJFvUt13
>> It works on my (single) test case so far. I don't have any more time to work in this right now, but I'll test edge cases and add more comments later (feedback is welcome).
>> If you use this, please, please, please back up your zip file in a different directory. I haven't tested it thoroughly enough to be confident that it won't suck your files into the black hole of /dev/null.
>> On a side note, it does check to make sure the directory doesn't exist, so it shouldn't clobber anything. That goes for the internal zips as well.
>> The only cryptic thing in the $IFS env var. That's needed for newline delimiters, so I can iterate over the zip files in a directory. I'll experiment with leaving that section out.
>> There's probably a bash guru out there that can do this with a one-liner, but that's beyond my skills (I'm a newbie at bash, too).
> You should be able to avoid fiddling with IFS by using:
>     shopt -s nullglob
>     zipfiles=(*.zip)
> It also has the advantage of not spawning a process to find zip files. 
> The nullglob option is needed in case there are no zip files, 
> otherwise (*.zip) will turn into a literal ('*.zip') instead of an 
> empty array.
> Regards,
> Maarten

Oh, and I forgot to mention that when you do that you ought to loop over 
the array as (bash is a bit weird):

    for file in "${zipfiles[@]}"; do

Otherwise paths with spaces would be a problem.


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