Update new PythonPackage template to prefer --config-settings (#38918)

lib/spack/spack/build_systems/python.py

@@ -401,7 +401,8 @@ def build_directory(self):
 
     def config_settings(self, spec, prefix):
         """Configuration settings to be passed to the PEP 517 build backend.
-        Requires pip 22.1+, which requires Python 3.7+.
+
+        Requires pip 22.1 or newer.
 
         Args:
             spec (spack.spec.Spec): build spec
@@ -415,6 +416,8 @@ def config_settings(self, spec, prefix):
     def install_options(self, spec, prefix):
         """Extra arguments to be supplied to the setup.py install command.
 
+        Requires pip 23.0 or older.
+
         Args:
             spec (spack.spec.Spec): build spec
             prefix (spack.util.prefix.Prefix): installation prefix
@@ -428,6 +431,8 @@ def global_options(self, spec, prefix):
         """Extra global options to be supplied to the setup.py call before the install
         or bdist_wheel command.
 
+        Deprecated in pip 23.1.
+
         Args:
             spec (spack.spec.Spec): build spec
             prefix (spack.util.prefix.Prefix): installation prefix

lib/spack/spack/cmd/create.py

@@ -325,6 +325,7 @@ class PythonPackageTemplate(PackageTemplate):
     # FIXME: Add a build backend, usually defined in pyproject.toml. If no such file
     # exists, use setuptools.
     # depends_on("py-setuptools", type="build")
+    # depends_on("py-hatchling", type="build")
     # depends_on("py-flit-core", type="build")
     # depends_on("py-poetry-core", type="build")
 
@@ -332,17 +333,11 @@ class PythonPackageTemplate(PackageTemplate):
     # depends_on("py-foo", type=("build", "run"))"""
 
     body_def = """\
-    def global_options(self, spec, prefix):
+    def config_settings(self, spec, prefix):
-        # FIXME: Add options to pass to setup.py
+        # FIXME: Add configuration settings to be passed to the build backend
         # FIXME: If not needed, delete this function
-        options = []
+        settings = {}
-        return options
+        return settings"""
-
-    def install_options(self, spec, prefix):
-        # FIXME: Add options to pass to setup.py install
-        # FIXME: If not needed, delete this function
-        options = []
-        return options"""
 
     def __init__(self, name, url, *args, **kwargs):
         # If the user provided `--name py-numpy`, don't rename it py-py-numpy

lib/spack/spack/test/cmd/create.py

@@ -91,12 +91,7 @@
         (
             ["-t", "python", "/test-python"],
             "py-test-python",
-            [
+            [r"PyTestPython(PythonPackage)", r'depends_on("py-', r"def config_settings(self"],
-                r"PyTestPython(PythonPackage)",
-                r'depends_on("py-',
-                r"def global_options(self",
-                r"def install_options(self",
-            ],
         ),
         (
             ["-t", "qmake", "/test-qmake"],