Move code from sage_setup to pkgs

[tobiasdiez]

Move the code from src/sage_setup to pkgs/sage_setup. This is preparation for deleting sage_setup completely after the remaining usages have been replaced by meson. Only the code generation code is left under src (because it's also needed by meson), but moved under the autogen folder.

📝 Checklist

• The title is concise and informative.
• The description explains in detail what this PR is about.
• I have linked a relevant issue or discussion.
• I have created tests covering the changes.
• I have updated the documentation and checked the documentation preview.

⌛ Dependencies

[tobiasdiez]

@dimpase The CI fails for this while installing sagelib. The strange thing, however, is that it first succeeds to build sagelib, but for some reason tries to build it again. Can you confirm locally that there is an issue here?

(Also needs to investigate how to still vendor sage-setup, i.e. to not revert #37287).

[dimpase]

OK, I'll try to rebase it over the current beta, and test locally

[dimpase]

locally for me, "make build" ends up pretty quickly, with ModuleNotFoundError: No module named 'sage_setup.command.sage_build_ext_minimal'

ake --no-print-directory sagelib-SAGE_VENV-no-deps
[sagelib-10.6.beta9] Setting up build directory /Volumes/dima/sage/local/var/lib/sage/venv-python3.13/var/tmp/sage/build/sagelib-10.6.beta9
[sagelib-10.6.beta9] Host system: Darwin studio.local 24.3.0 Darwin Kernel Version 24.3.0: Thu Jan  2 20:24:16 PST 2025; root:xnu-11215.81.4~3/RELEASE_ARM64_T6000 arm64
[sagelib-10.6.beta9] C compiler: gcc, Apple clang version 16.0.0 (clang-1600.0.26.6), Target: arm64-apple-darwin24.3.0, Thread model: posix, InstalledDir: /Library/Developer/CommandLineTools/usr/bin
[sagelib-10.6.beta9] No stamp file for package 'sagelib' in /Volumes/dima/sage/local/var/lib/sage/venv-python3.13/var/lib/sage/installed
[sagelib-10.6.beta9] No spkg-legacy-uninstall script; nothing to do
[sagelib-10.6.beta9] [spkg-install] Installing sagelib-10.6.beta9 (editable mode)
[sagelib-10.6.beta9] [spkg-install] Using pip 24.2 from /Volumes/dima/sage/local/var/lib/sage/venv-python3.13/lib/python3.13/site-packages/pip (python 3.13)
[sagelib-10.6.beta9] [spkg-install] Obtaining file:///Volumes/dima/sage/src
[sagelib-10.6.beta9] [spkg-install]   Checking if build backend supports build_editable: started
[sagelib-10.6.beta9] [spkg-install]   Running command Checking if build backend supports build_editable
[sagelib-10.6.beta9] [spkg-install]   Checking if build backend supports build_editable: finished with status 'done'
[sagelib-10.6.beta9] [spkg-install]   Preparing metadata (pyproject.toml): started
[sagelib-10.6.beta9] [spkg-install]   Running command Preparing metadata (pyproject.toml)
[sagelib-10.6.beta9] [spkg-install]   Traceback (most recent call last):
[sagelib-10.6.beta9] [spkg-install]     File "/Volumes/dima/sage/local/var/lib/sage/venv-python3.13/lib/python3.13/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in <module>
[sagelib-10.6.beta9] [spkg-install]       main()
[sagelib-10.6.beta9] [spkg-install]       ~~~~^^
[sagelib-10.6.beta9] [spkg-install]     File "/Volumes/dima/sage/local/var/lib/sage/venv-python3.13/lib/python3.13/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 335, in main
[sagelib-10.6.beta9] [spkg-install]       json_out['return_val'] = hook(**hook_input['kwargs'])
[sagelib-10.6.beta9] [spkg-install]                                ~~~~^^^^^^^^^^^^^^^^^^^^^^^^
[sagelib-10.6.beta9] [spkg-install]     File "/Volumes/dima/sage/local/var/lib/sage/venv-python3.13/lib/python3.13/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 149, in prepare_metadata_for_build_wheel
[sagelib-10.6.beta9] [spkg-install]       return hook(metadata_directory, config_settings)
[sagelib-10.6.beta9] [spkg-install]     File "/opt/homebrew/lib/python3.13/site-packages/setuptools/build_meta.py", line 377, in prepare_metadata_for_build_wheel
[sagelib-10.6.beta9] [spkg-install]       self.run_setup()
[sagelib-10.6.beta9] [spkg-install]       ~~~~~~~~~~~~~~^^
[sagelib-10.6.beta9] [spkg-install]     File "/opt/homebrew/lib/python3.13/site-packages/setuptools/build_meta.py", line 320, in run_setup
[sagelib-10.6.beta9] [spkg-install]       exec(code, locals())
[sagelib-10.6.beta9] [spkg-install]       ~~~~^^^^^^^^^^^^^^^^
[sagelib-10.6.beta9] [spkg-install]     File "<string>", line 22, in <module>
[sagelib-10.6.beta9] [spkg-install]   ModuleNotFoundError: No module named 'sage_setup.command.sage_build_ext_minimal'
[sagelib-10.6.beta9] [spkg-install]   error: subprocess-exited-with-error
[sagelib-10.6.beta9] [spkg-install]   
[sagelib-10.6.beta9] [spkg-install]   � Preparing metadata (pyproject.toml) did not run successfully.
[sagelib-10.6.beta9] [spkg-install]   � exit code: 1
[sagelib-10.6.beta9] [spkg-install]   ��> See above for output.
[sagelib-10.6.beta9] [spkg-install]   
[sagelib-10.6.beta9] [spkg-install]   note: This error originates from a subprocess, and is likely not a problem with pip.
[sagelib-10.6.beta9] [spkg-install]   full command: /Volumes/dima/sage/local/var/lib/sage/venv-python3.13/bin/python3 /Volumes/dima/sage/local/var/lib/sage/venv-python3.13/lib/python3.13/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py prepare_metadata_for_build_wheel /var/folders/81/vt06lnj17rj0cpc9gdshy4q00000gr/T/tmpbnr56by_
[sagelib-10.6.beta9] [spkg-install]   cwd: /Volumes/dima/sage/src
[sagelib-10.6.beta9] [spkg-install]   Preparing metadata (pyproject.toml): finished with status 'error'
[sagelib-10.6.beta9] [spkg-install] error: metadata-generation-failed
[sagelib-10.6.beta9] [spkg-install] 
[sagelib-10.6.beta9] [spkg-install] � Encountered error while generating package metadata.
[sagelib-10.6.beta9] [spkg-install] ��> See above for output.
[sagelib-10.6.beta9] [spkg-install] 
[sagelib-10.6.beta9] [spkg-install] note: This is an issue with the package mentioned above, not pip.
[sagelib-10.6.beta9] [spkg-install] hint: See above for details.
[sagelib-10.6.beta9] [spkg-install] ********************************************************************************
[sagelib-10.6.beta9] [spkg-install] Error installing sagelib-10.6.beta9

[tobiasdiez]

It's probably easier to just delete sage-setup as soon as it's no longer used by sage-the-distro.