use pyproject.toml and setuptools_scm (#13)

* use pyproject.toml and setuptools_scm

* use correct package

Author: mathause

.git_archival.txt

@@ -0,0 +1,4 @@
+node: $Format:%H$
+node-date: $Format:%cI$
+describe-name: $Format:%(describe:tags=true)$
+ref-names: $Format:%D$

.gitattributes

@@ -0,0 +1 @@
+.git_archival.txt export-subst

mplotutils/__init__.py

@@ -4,3 +4,18 @@
 from .cartopy_utils import *
 from .colorbar_utils import *
 from .mpl_utils import *
+
+try:
+    from importlib.metadata import version as _get_version
+except ImportError:
+    # importlib.metadata not available in python 3.7
+    import pkg_resources
+
+    _get_version = lambda pkg: pkg_resources.get_distribution(pkg).version
+
+try:
+    __version__ = _get_version("mplotutils")
+except Exception:
+    # Local copy or not installed with setuptools.
+    # Disable minimum version checks on downstream libraries.
+    __version__ = "999"

mplotutils/version.py

@@ -0,0 +1,11 @@
+[build-system]
+requires = [
+    "setuptools>=42",
+    "wheel",
+    "setuptools_scm[toml]>=7.0",
+]
+build-backend = "setuptools.build_meta"
+
+[tool.setuptools_scm]
+fallback_version = "999"
+version_scheme = "no-guess-dev"

pyproject.toml

@@ -1,3 +1,3 @@
 from setuptools import setup
 
-setup()
+setup(use_scm_version={"fallback_version": "999", "version_scheme": "no-guess-dev"})