Migrate project metadata from setup.py to pyproject.toml following PEP621

pyproject.toml

@@ -1,7 +1,44 @@
 [build-system]
-requires = ["setuptools>=45", "setuptools_scm[toml]>=6.2"]
+requires = ["setuptools>=61", "setuptools_scm[toml]>=6.2"]
 build-backend = "setuptools.build_meta"
 
+[project]
+name = "pygmt"
+description = "A Python interface for the Generic Mapping Tools"
+readme = "README.rst"
+requires-python = ">=3.8"
+license = {text = "BSD License"}
+authors = [{name = "The PyGMT Developers", email = "[email protected]"}]
+maintainers = [{name = "The PyGMT Developers", email = "[email protected]"}]
+keywords = []
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Intended Audience :: Science/Research",
+    "Intended Audience :: Developers",
+    "Intended Audience :: Education",
+    "Topic :: Scientific/Engineering",
+    "Topic :: Software Development :: Libraries",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "License :: OSI Approved :: BSD License",
+]
+dependencies = ["numpy>=1.19", "pandas", "xarray", "netCDF4", "packaging"]
+dynamic = ["version"]
+
+[project.urls]
+homepage = "https://www.pygmt.org"
+documentation = "https://www.pygmt.org"
+repository = "https://github.com/GenericMappingTools/pygmt"
+changelog = "https://www.pygmt.org/latest/changes.html"
+
+[tool.setuptools]
+platforms = ["Any"]
+
+[tool.setuptools.packages.find]
+include = ["pygmt*"]
+exclude = ["doc"]
+
 [tool.setuptools_scm]
 local_scheme = "node-and-date"
 fallback_version = "unknown"

setup.py

@@ -1,59 +1,3 @@
-"""
-Build and install the project.
-"""
-from setuptools import find_packages, setup
+from setuptools import setup
 
-NAME = "pygmt"
-FULLNAME = "PyGMT"
-AUTHOR = "The PyGMT Developers"
-AUTHOR_EMAIL = "[email protected]"
-MAINTAINER = AUTHOR
-MAINTAINER_EMAIL = AUTHOR_EMAIL
-LICENSE = "BSD License"
-URL = "https://github.com/GenericMappingTools/pygmt"
-DESCRIPTION = "A Python interface for the Generic Mapping Tools"
-KEYWORDS = ""
-with open("README.rst", "r", encoding="utf8") as f:
-    LONG_DESCRIPTION = "".join(f.readlines())
-
-PACKAGES = find_packages(exclude=["doc"])
-SCRIPTS = []
-PACKAGE_DATA = {"pygmt.tests": ["data/*", "baseline/*"]}
-
-CLASSIFIERS = [
-    "Development Status :: 4 - Beta",
-    "Intended Audience :: Science/Research",
-    "Intended Audience :: Developers",
-    "Intended Audience :: Education",
-    "Topic :: Scientific/Engineering",
-    "Topic :: Software Development :: Libraries",
-    "Programming Language :: Python :: 3.8",
-    "Programming Language :: Python :: 3.9",
-    "Programming Language :: Python :: 3.10",
-    f"License :: OSI Approved :: {LICENSE}",
-]
-PLATFORMS = "Any"
-PYTHON_REQUIRES = ">=3.8"
-INSTALL_REQUIRES = ["numpy>=1.19", "pandas", "xarray", "netCDF4", "packaging"]
-
-if __name__ == "__main__":
-    setup(
-        name=NAME,
-        fullname=FULLNAME,
-        description=DESCRIPTION,
-        long_description=LONG_DESCRIPTION,
-        author=AUTHOR,
-        author_email=AUTHOR_EMAIL,
-        maintainer=MAINTAINER,
-        maintainer_email=MAINTAINER_EMAIL,
-        license=LICENSE,
-        url=URL,
-        platforms=PLATFORMS,
-        scripts=SCRIPTS,
-        packages=PACKAGES,
-        package_data=PACKAGE_DATA,
-        classifiers=CLASSIFIERS,
-        keywords=KEYWORDS,
-        python_requires=PYTHON_REQUIRES,
-        install_requires=INSTALL_REQUIRES,
-    )
+setup()