Remove dependency on tar from msys2

[nacho]

Since now we use Python 3 we could perfectly use the tarfile module to decompress the tarballs.

[guruDanny67]

I make a small test program to see if all the files will be extracted ok:

import tarfile
import os

def ex_all(base_dir):
    lf = os.listdir(base_dir)
    for i in lf:
        full = os.path.join(base_dir, i)
        if os.path.isfile(full):
            if i.endswith('.zip'):
                print('--- Zip file %s ...' % (i, ))
            elif i.endswith('.exe'):
                print('--- Exe file %s ...' % (i, ))
            else:
                print(i)
                tf = tarfile.open(full)
                ext_dir = os.path.join('c:/temp/u', i)
                tf.extractall(path = ext_dir)

ex_all('c:/gtk-build/src')

and every file present in my src dir (sometime with multiple versions, for gtk3 I have tarballs for 3.22.5, .6, .7, .8, .9, .11 & .12) it's been correcty extracted without error but probably to handle the --drop conponent of the tar file we need to extract all the single files.

Another thing that is different from the tar utility is that the tar utility overwrite, silently, all the file, even the read only one, while python gives an exception (I found it when I restart the script because I don't test for the .exe extension of nuget).

This should be no problem for us because, if I understand correctly, if the extraction directory exist the unpack part is simply skipped.

This lead me to a note: when we change version of some package (say, gtk3 from 3.22.6 o 3.22.12) to get the update data we need to delete the directory first or pass a --clean option ?

If it's the case we can put a marker file (wingtk-extracted-version.txt or something like this) and check this file to see if we already extracted the tarball and, if the version change, clean up the directory and extract the new one ?

[nacho]

Sorry for the late response, I would say, let's check what jhbuild does on this regard and copy the behavior

[nacho]

Closing this now. Thanks