GH-103480: make sysconfig a package (GH-110785)

[FFY00]

In preparation for the new API, this patch makes sysconfig a package. It has been a long time coming and open up several possibilities for improvements — it will allow us to more easily improve the import time, extend the CLI, have better separation between the code logic, etc.

• Issue: New sysconfig API 🤞 (meta-issue) #103480

[FFY00]

@zooba, just pinging you for a sanity check on the change, since you have some interest in sysconfig. I'd fell a bit better merging this if other person ack-ed it.

Please let me know if you'd like me avoiding doing that in the future.

[zooba]

Looks good to me. You can feel free to keep pinging me on this stuff (that's not an open invite for anyone to do it!)

I think this may be worth a NEWS item. Just something simple, but enough that if someone freaks out because they were using internal function that are now moved, they'll be able to find an item acknowledging that we changed something (even though it shouldn't be visible... well... any change is always noticed by someone 😉 )

[FFY00]

Sounds good, thanks!

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x Debian 3.x has failed when building commit 4a53a39.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/all/#builders/49/builds/6891) and take a look at the build logs.
4. Check if the failure is related to this commit (4a53a39) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/all/#builders/49/builds/6891

Failed tests:

• test_tools

Failed subtests:

• test_freeze_simple_script - test.test_tools.test_freeze.TestFreeze.test_freeze_simple_script

Summary of the results of the build (if available):

==

Click to see traceback logs

Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Lib/test/test_tools/test_freeze.py", line 33, in test_freeze_simple_script
    executable = helper.freeze(python, scriptfile, outdir)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Tools/freeze/test/freeze.py", line 169, in freeze
    _run_quiet([python, '-E', FREEZE, '-o', outdir, scriptfile], cwd=outdir)
  File "/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Tools/freeze/test/freeze.py", line 35, in _run_quiet
    return subprocess.run(
           ^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Lib/subprocess.py", line 571, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['/tmp/test_python_iwbkfopc/tmpfwqvbf4v/python-installation/bin/python3', '-E', '/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Tools/freeze/freeze.py', '-o', '/tmp/test_python_iwbkfopc/tmpfwqvbf4v', '/tmp/test_python_iwbkfopc/tmpfwqvbf4v/app.py']' returned non-zero exit status 1.


Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Tools/freeze/freeze.py", line 96, in <module>
    import sysconfig
ModuleNotFoundError: No module named 'sysconfig'


Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Lib/test/test_tools/test_freeze.py", line 33, in test_freeze_simple_script
    executable = helper.freeze(python, scriptfile, outdir)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Tools/freeze/test/freeze.py", line 169, in freeze
    _run_quiet([python, '-E', FREEZE, '-o', outdir, scriptfile], cwd=outdir)
  File "/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Tools/freeze/test/freeze.py", line 35, in _run_quiet
    return subprocess.run(
           ^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Lib/subprocess.py", line 571, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['/tmp/test_python_w1ng9ean/tmpc5qpg50a/python-installation/bin/python3', '-E', '/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Tools/freeze/freeze.py', '-o', '/tmp/test_python_w1ng9ean/tmpc5qpg50a', '/tmp/test_python_w1ng9ean/tmpc5qpg50a/app.py']' returned non-zero exit status 1.

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x SLES 3.x has failed when building commit 4a53a39.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/all/#builders/540/builds/6854) and take a look at the build logs.
4. Check if the failure is related to this commit (4a53a39) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/all/#builders/540/builds/6854

Failed tests:

• test_tools

Failed subtests:

• test_freeze_simple_script - test.test_tools.test_freeze.TestFreeze.test_freeze_simple_script

Summary of the results of the build (if available):

==

Click to see traceback logs

Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Lib/test/test_tools/test_freeze.py", line 33, in test_freeze_simple_script
    executable = helper.freeze(python, scriptfile, outdir)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Tools/freeze/test/freeze.py", line 169, in freeze
    _run_quiet([python, '-E', FREEZE, '-o', outdir, scriptfile], cwd=outdir)
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Tools/freeze/test/freeze.py", line 35, in _run_quiet
    return subprocess.run(
           ^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Lib/subprocess.py", line 571, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['/tmp/test_python_b1_p0vku/tmp1tabnyue/python-installation/bin/python3', '-E', '/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Tools/freeze/freeze.py', '-o', '/tmp/test_python_b1_p0vku/tmp1tabnyue', '/tmp/test_python_b1_p0vku/tmp1tabnyue/app.py']' returned non-zero exit status 1.


Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Tools/freeze/freeze.py", line 96, in <module>
    import sysconfig
ModuleNotFoundError: No module named 'sysconfig'


Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Lib/test/test_tools/test_freeze.py", line 33, in test_freeze_simple_script
    executable = helper.freeze(python, scriptfile, outdir)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Tools/freeze/test/freeze.py", line 169, in freeze
    _run_quiet([python, '-E', FREEZE, '-o', outdir, scriptfile], cwd=outdir)
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Tools/freeze/test/freeze.py", line 35, in _run_quiet
    return subprocess.run(
           ^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Lib/subprocess.py", line 571, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['/tmp/test_python_6j7lkjum/tmpve36r7ly/python-installation/bin/python3', '-E', '/home/dje/cpython-buildarea/3.x.edelsohn-sles-z/build/Tools/freeze/freeze.py', '-o', '/tmp/test_python_6j7lkjum/tmpve36r7ly', '/tmp/test_python_6j7lkjum/tmpve36r7ly/app.py']' returned non-zero exit status 1.