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

Makefile

@@ -4,12 +4,12 @@ TESTDIR=tmp-test-dir-with-unique-name
 PYTEST_COV_ARGS=--cov=$(PROJECT) --cov-config=../pyproject.toml \
 			--cov-report=term-missing --cov-report=xml --cov-report=html \
 			--pyargs ${PYTEST_EXTRA}
-BLACK_FILES=$(PROJECT) setup.py doc/conf.py examples
+BLACK_FILES=$(PROJECT) doc/conf.py examples
 BLACKDOC_OPTIONS=--line-length 79
-DOCFORMATTER_FILES=$(PROJECT) setup.py doc/conf.py examples
+DOCFORMATTER_FILES=$(PROJECT) doc/conf.py examples
 DOCFORMATTER_OPTIONS=--recursive --pre-summary-newline --make-summary-multi-line --wrap-summaries 79 --wrap-descriptions 79
-FLAKE8_FILES=$(PROJECT) setup.py doc/conf.py examples
-LINT_FILES=$(PROJECT) setup.py doc/conf.py
+FLAKE8_FILES=$(PROJECT) doc/conf.py examples
+LINT_FILES=$(PROJECT) doc/conf.py
 
 help:
 	@echo "Commands:"

doc/maintenance.md

@@ -167,7 +167,7 @@ alongside the rest of the Scientific Python ecosystem, and therefore supports:
 * All minor versions of NumPy released in the 24 months prior to the project,
   and at minimum the last three minor versions.
 
-In `setup.py`, the `python_requires` variable should be set to the minimum
+In `pyproject.toml`, the `requires-python` key should be set to the minimum
 supported version of Python. Minimum Python and NumPy version support should be
 adjusted upward on every major and minor release, but never on a patch release.
 

pyproject.toml

@@ -1,7 +1,45 @@
 [build-system]
-requires = ["setuptools>=45", "setuptools_scm[toml]>=6.2"]
+requires = ["setuptools>=64", "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"]
+include-package-data = true
+
+[tool.setuptools.packages.find]
+include = ["pygmt*"]
+exclude = ["doc"]
+
 [tool.setuptools_scm]
 local_scheme = "node-and-date"
 fallback_version = "999.999.999+unknown"