7ziptozip.py

"""
Converts in batch 7zip files to zip
"""
import zipfile
import glob
from io import BytesIO
import argparse

# Uncomment to use macos hack brew version of  of libarchive
# import os
# os.environ['LA_LIBRARY_FILEPATH']='/usr/local/opt/libarchive/lib/libarchive.dylib'


import libarchive.public

if __name__ == '__main__':
    parser = argparse.ArgumentParser()
    parser.add_argument('-i','--input', help='input directory glob (e.g. /path/to/*.7z)"', required=True)
    parser.add_argument('-o','--output', help='output directory', required=True)

    args = parser.parse_args()


    files = glob.glob(args.input)

    for fname in files:
        zippyname = fname.split('/')[-1].split('.7z')[0]
        with open(fname, 'rb') as f:
            buffer_ = f.read()
            newzip = '{0}/{1}.zip'.format(args.output, zippyname)
            print("{0} write".format(newzip))
            with zipfile.ZipFile(file=newzip, mode='a', compression=zipfile.ZIP_DEFLATED) as zipf:
                with libarchive.public.memory_reader(buffer_) as e:
                    for entry in e:
                        fio = BytesIO()
                        for block in entry.get_blocks():
                            fio.write(block)
                        fio.flush()
                        fio.seek(0)

                        zipf.writestr(str(entry.pathname), fio.read())