[Python Minimal] Use setup.cfg configuration

This change provides similar benefits as for the other two Python
distributions. It should allow easier uploading to PyPI and now includes
the README and License files.

SConstruct

@@ -110,7 +110,9 @@ if "clean" in COMMAND_LINE_TARGETS:
     remove_file("interfaces/cython/setup.cfg")
     remove_file("interfaces/cython/LICENSE.txt")
     remove_file("interfaces/cython/README.rst")
-    remove_file("interfaces/python_minimal/setup.py")
+    remove_file("interfaces/python_minimal/setup.cfg")
+    remove_file("interfaces/python_minimal/LICENSE.txt")
+    remove_file("interfaces/python_minimal/README.rst")
     remove_file("config.log")
     remove_directory("doc/sphinx/matlab/examples")
     remove_file("doc/sphinx/matlab/examples.rst")

interfaces/python_minimal/.gitignore

@@ -1,5 +1,3 @@
-setup*.py
-scripts/*
 cantera/ck2cti.py
 cantera/ctml_writer.py
 cantera/ck2yaml.py
@@ -8,3 +6,6 @@ cantera/ctml2yaml.py
 build
 dist
 Cantera_minimal.egg-info
+LICENSE.txt
+README.rst
+setup.cfg

interfaces/python_minimal/SConscript

@@ -7,23 +7,30 @@ Import('env', 'build', 'install')
 
 localenv = env.Clone()
 
-make_setup = build(localenv.SubstFile('setup.py', 'setup.py.in'))
+make_setup = build(localenv.SubstFile("setup.cfg", "setup.cfg.in"))
 
 # copy scripts from the full Cython module
-for script in ['ctml_writer', 'ck2cti', 'ck2yaml', 'cti2yaml', 'ctml2yaml']:
+for script in ["ctml_writer", "ck2cti", "ck2yaml", "cti2yaml", "ctml2yaml"]:
     # The actual script
-    s = build(env.Command('cantera/{}.py'.format(script),
-                          '#interfaces/cython/cantera/{}.py'.format(script),
-                          Copy('$TARGET', '$SOURCE')))
+    s = build(env.Command(f"cantera/{script}.py",
+                          f"#interfaces/cython/cantera/{script}.py",
+                          Copy("$TARGET", "$SOURCE")))
     localenv.Depends(make_setup, s)
 
-build_cmd = ('cd interfaces/python_minimal &&'
-             ' $python_cmd_esc setup.py build --build-lib=../../build/python')
+build_cmd = ("cd interfaces/python_minimal && "
+             "$python_cmd_esc setup.py build --build-base=../../build/python")
 
-mod = build(localenv.Command('#build/python/cantera/__init__.py', 'setup.py',
+mod = build(localenv.Command("#build/python/cantera/__init__.py", "setup.cfg",
                              build_cmd))
 env['python_module'] = mod
 
+readme = localenv.Command("README.rst", "#README.rst", Copy("$TARGET", "$SOURCE"))
+# The target of this command must match the file listed in setup.cfg.in
+license = localenv.Command("LICENSE.txt", "#License.txt",
+                           Copy("$TARGET", "$SOURCE"))
+localenv.Depends(license, localenv["license_target"])
+localenv.Depends(mod, [make_setup, readme, license])
+
 if localenv['PYTHON_INSTALLER'] == 'direct':
     if localenv['python_prefix'] == 'USER':
         # Install to the OS-dependent user site-packages directory

interfaces/python_minimal/setup.cfg.in

@@ -0,0 +1,49 @@
+[metadata]
+name = Cantera_minimal
+version = @cantera_version@
+description = A minimal Cantera interface, containing only the input file conversion scripts
+long_description = This Cantera interface contains the conversion scripts for input files into the Cantera format. For the full Python interface, please see [Cantera](https://pypi.org/project/cantera).
+long_description_content_type = text/markdown
+license_files = LICENSE.txt
+url = https://cantera.org
+author = Cantera Developers
+author_email = developers@cantera.org
+keywords = chemistry physics
+license = BSD 3-Clause License
+classifiers =
+    Development Status :: 5 - Production/Stable
+    Intended Audience :: Education
+    Intended Audience :: Science/Research
+    License :: OSI Approved :: BSD License
+    Operating System :: MacOS :: MacOS X
+    Operating System :: Microsoft :: Windows
+    Operating System :: POSIX :: Linux
+    Programming Language :: Python :: 3 :: Only
+    Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
+    Topic :: Scientific/Engineering :: Chemistry
+    Topic :: Scientific/Engineering :: Physics
+project_urls =
+    Documentation = https://cantera.org/documentation
+    Funding = https://numfocus.org/donate-to-cantera
+    Source = https://github.com/Cantera/cantera
+    Tracker = https://github.com/Cantera/cantera/issues
+
+[options]
+zip_safe = True
+install_requires =
+    numpy >= 1.12.0
+    ruamel.yaml >= 0.15.34
+python_requires = >=@py_min_ver_str@
+packages =
+    cantera
+
+[options.entry_points]
+console_scripts =
+    ck2cti = cantera.ck2cti:script_entry_point
+    ctml_writer = cantera.ctml_writer:main
+    ck2yaml = cantera.ck2yaml:script_entry_point
+    cti2yaml = cantera.cti2yaml:main
+    ctml2yaml = cantera.ctml2yaml:main

interfaces/python_minimal/setup.py

@@ -0,0 +1,3 @@
+from setuptools import setup
+
+setup()