sage_setup: Add PEP 517 / PEP 660 buildapi

[mkoeppe]

We replace MANIFEST filtering in the modularized distributions by implementing a PEP 517/PEP 660 buildapi in sage_setup.

• PEP 660 build_editable via https://editables.readthedocs.io/en/latest/usage.html#mapping-individual-files-packages

• https://github.com/pypa/setuptools/blob/main/setuptools/command/editable_wheel.py

• https://www.python.org/dev/peps/pep-0660/ Editable installs for pyproject.toml based builds (wheel based)

• python/cpython#92054 Clarification about how to implement namespace packages (as in PEP 420) via import hooks for PEP 660 use case

References (outdated):

• https://github.com/takluyver/flit/blob/master/flit_core/flit_core/buildapi.py
• https://flit.readthedocs.io/en/latest/pyproject_toml.html#
• Poetry issue #265 - Support for custom commands and functions - closed as wontfix
• https://pypi.org/project/enscons/ ?
• https://discuss.python.org/t/help-testing-pep-660-support-in-setuptools/16904
• #29846, #30581, #21516

Component: build

Issue created by migration from https://trac.sagemath.org/ticket/29845

[mkoeppe]

Dependencies: #29846

[mkoeppe]

Description changed:

--- 
+++ 
@@ -2,9 +2,12 @@
 
 This could be done, for example, by customizing flit. 
 
+
 References:
 - https://github.com/takluyver/flit/blob/master/flit_core/flit_core/buildapi.py
 - https://flit.readthedocs.io/en/latest/pyproject_toml.html#
+- [https://github.com/python-poetry/poetry/issues/265 Poetry issue #265 - Support for custom commands and functions](https://github.com/python-poetry/poetry/issues/265 Poetry issue #265 - Support for custom commands and functions) closed as wontfix
 
 
 
+

[mkoeppe]

Description changed:

--- 
+++ 
@@ -6,7 +6,7 @@
 References:
 - https://github.com/takluyver/flit/blob/master/flit_core/flit_core/buildapi.py
 - https://flit.readthedocs.io/en/latest/pyproject_toml.html#
-- [https://github.com/python-poetry/poetry/issues/265 Poetry issue #265 - Support for custom commands and functions](https://github.com/python-poetry/poetry/issues/265 Poetry issue #265 - Support for custom commands and functions) closed as wontfix
+- [Poetry issue #265 - Support for custom commands and functions](https://github.com/python-poetry/poetry/issues/265) - closed as wontfix
 
 
 

[tobiasdiez]

Description changed:

--- 
+++ 
@@ -7,7 +7,7 @@
 - https://github.com/takluyver/flit/blob/master/flit_core/flit_core/buildapi.py
 - https://flit.readthedocs.io/en/latest/pyproject_toml.html#
 - [Poetry issue #265 - Support for custom commands and functions](https://github.com/python-poetry/poetry/issues/265) - closed as wontfix
+- https://pypi.org/project/enscons/ ?
 
 
 
-

[mkoeppe]

Changed dependencies from #29846 to #29846, #30581

[mkoeppe]

comment:7

Setting new milestone based on a cursory review of ticket status, priority, and last modification date.

[mkoeppe]

Description changed:

--- 
+++ 
@@ -9,5 +9,5 @@
 - [Poetry issue #265 - Support for custom commands and functions](https://github.com/python-poetry/poetry/issues/265) - closed as wontfix
 - https://pypi.org/project/enscons/ ?
 
+- https://www.python.org/dev/peps/pep-0660/ Editable installs for pyproject.toml based builds (wheel based)
 
-

[mkoeppe]

Description changed:

--- 
+++ 
@@ -10,4 +10,4 @@
 - https://pypi.org/project/enscons/ ?
 
 - https://www.python.org/dev/peps/pep-0660/ Editable installs for pyproject.toml based builds (wheel based)
-
+- https://github.com/python/cpython/issues/92054 Clarification about how to implement namespace packages (as in PEP 420) via import hooks for PEP 660 use case

[mkoeppe]

Description changed:

--- 
+++ 
@@ -11,3 +11,5 @@
 
 - https://www.python.org/dev/peps/pep-0660/ Editable installs for pyproject.toml based builds (wheel based)
 - https://github.com/python/cpython/issues/92054 Clarification about how to implement namespace packages (as in PEP 420) via import hooks for PEP 660 use case
+- https://discuss.python.org/t/help-testing-pep-660-support-in-setuptools/16904 
+