Do not use distutils to get Python library path

[vojtechtrefny]

distutils is deprecated and will be removed in Python 3.12.
sysconfig module provides replacement for distutils.sysconfig.

[vojtechtrefny]

And as expected, this doesn't work.

With Python 3.9:

>>> import sys
>>> sys.exec_prefix = "/home/brq/vtrefny/libbytesize/libbytesize-2.6/_inst/"
>>> import sysconfig
>>> sysconfig.get_path('platlib')
'/home/brq/vtrefny/libbytesize/libbytesize-2.6/_inst/lib64/python3.9/site-packages'

With Python 3.6:

>>> import sys
>>> sys.exec_prefix = "/home/brq/vtrefny/libbytesize/libbytesize-2.6/_inst/"
>>> import sysconfig
>>> sysconfig.get_path('platlib')
'/usr/lib64/python3.6/site-packages'

So back to the drawing board...

[vojtechtrefny]

Reading the code proved to be the best documentation once again. sysconfig.get_path('platlib', vars={'platbase': '${exec_prefix}'})) seems to be working everywhere.

[vpodzime]

ACK

[mbiebl]

Somehow this change broke the Debian build.

               libbytesize 2.7
             ====================

        prefix:                     /usr
        libdir:                     ${prefix}/lib/x86_64-linux-gnu
        libexecdir:                 ${exec_prefix}/libexec
        bindir:                     ${exec_prefix}/bin
        sbindir:                    ${exec_prefix}/sbin
        datadir:                    ${datarootdir}
        sysconfdir:                 /etc
        localstatedir:              /var
        docdir:                     ${datarootdir}/doc/${PACKAGE_TARNAME}

        compiler:                   gcc
        cflags:                     -g -O2 -ffile-prefix-map=/home/michael/debian/build-area/libbytesize-2.7=. -fstack-protector-strong -Wformat -Werror=format-security -DENABLE_NLS
        cppflags:                   -Wdate-time -D_FORTIFY_SOURCE=2
        ldflags:                    -Wl,-z,relro -Wl,-z,now

        Python 3 bindings:          yes
        tools:                      no
...

 /bin/mkdir -p '/home/michael/debian/build-area/libbytesize-2.7/debian/tmp/usr/local/lib/python3.10/dist-packages/bytesize'
 /usr/bin/install -c -m 644 bytesize.py __init__.py '/home/michael/debian/build-area/libbytesize-2.7/debian/tmp/usr/local/lib/python3.10/dist-packages/bytesize'

Notice how it installs the files in /usr/local despite using --prefix=/usr

Reverting this commit, I get:

<string>:1: DeprecationWarning: The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives
<string>:1: DeprecationWarning: The distutils.sysconfig module is deprecated, use sysconfig instead
<string>:1: DeprecationWarning: The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives
<string>:1: DeprecationWarning: The distutils.sysconfig module is deprecated, use sysconfig instead
<string>:1: DeprecationWarning: The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives
<string>:1: DeprecationWarning: The distutils.sysconfig module is deprecated, use sysconfig instead
<string>:1: DeprecationWarning: The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives
<string>:1: DeprecationWarning: The distutils.sysconfig module is deprecated, use sysconfig instead
<string>:1: DeprecationWarning: The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives
<string>:1: DeprecationWarning: The distutils.sysconfig module is deprecated, use sysconfig instead
 /bin/mkdir -p '/home/michael/debian/build-area/libbytesize-2.7/debian/tmp/usr/lib/python3/dist-packages/bytesize'
 /usr/bin/install -c -m 644 bytesize.py __init__.py '/home/michael/debian/build-area/libbytesize-2.7/debian/tmp/usr/lib/python3/dist-packages/bytesize'

A few warnings but installed into the proper path

[mbiebl]

Full build log attached:
build.log.txt