unzip specific extension only

Question

I have a a directory with zip archives the zip archives contain .jpg, .png, .gif images I want to unzip each archive taking the images only and putting them in a folder with the name of the archive

so files/archive1.zip files/archive2.zip files/archive3.zip files/archive4.zip

open archive1.zip - take sunflower.jpg, rose_sun.gif make a folder files/archive1/ and add the images to that folder so files/archive1/folder1.jpg, files/archive1/rose_sun.gif

and this to each archive

now i really don't know how this can be done all suggestions are welcome

PS i have over 600 archives and a automatic solution would be a lifesaver, preferably a linux solution

Answer 1

7zip can do this, and has a Linux version.

mkdir files/archive1
7z e -ofiles/archive1/ files/archive1.zip *.jpg *.png *.gif

(Just tested it, it works.)

Answer 2

You can write a program using a zip library. If you do Mono, you can use DotNetZip.

The code would look like this:

foreach (var archive in listOfZips)
{
    using (var zip = ZipFile.Read(archive)
    {
        foreach (ZipEntry e in zip)
        {
            if (IsImageFile(e.FileName))
            {
                e.FileName = System.IO.Path.Combine(archive.Replace(".zip",""), 
                                  System.IO.Path.GetFileName(e.FileName));
                e.Extract("files");
            }
        }
    }
}

Answer 3

Something along the lines of:

#!/bin/bash
cd ~/basedir/files
for file in *.zip ; do
    newfile=$(echo "${file}" | sed -e 's/^files.//' -e 's/.zip$//')
    echo ":${newfile}:"
    mkdir tmp
    rm -rf "${newfile}"
    mkdir "${newfile}"
    cp "${newfile}.zip" tmp
    cd tmp
    unzip "${newfile}.zip"
    find . -name '*.jpg' -exec cp {} "../${newfile}" ';'
    find . -name '*.gif' -exec cp {} "../${newfile}" ';'
    cd ..
    rm -rf tmp
done

This is tested and will handle spaces in filenames (both the zip files and the extracted files). You may have collisions if the zip file has the same file name in different directories (you can't avoid this if you're going to flatten the directory structure).

Answer 4

Perl's Archive-Zip is a good library for zipping/unzipping.

Answer 5

Here's my take on the first answer...

#!/bin/bash
cd files
for zip_name in *.zip ; do
    dir_name=$(echo "${zip_name}" | sed -e 's/^files.//' -e 's/.zip$//')
    mkdir ${dir_name}
    7z e -o${dir_name}/ ${zip_name} *.jpg *.png *.gif
done

or, if you'd just like to use the regular unzip command...

unzip -d ${dir_name}/ ${zip_name} *.jpg *.png *.gif

I haven't tested this, but it should work... or something along these lines. Definitely more efficient than the first solution. :)

Hope this helps!