use setuptools_scm for python package versioning

Author: digorgonzola

.gitignore

@@ -1,3 +1,6 @@
+# Ignore the version file, it's created on install
+aodntools/_version.py
+
 # Python files
 *.pyc
 *.egg-info

aodntools/__init__.py

@@ -1 +1,5 @@
+try:
+    from ._version import version as __version__
+except ImportError:
+    __version__ = "Unknown/Not Installed"
 __version__ = '0.0.0'

pyproject.toml

@@ -0,0 +1,5 @@
+[build-system]
+requires = ["setuptools>=42", "wheel", "setuptools_scm[toml]>=3.4"]
+
+[tool.setuptools_scm]
+write_to = "aodntools/_version.py"

setup.py

@@ -9,7 +9,8 @@
 ]
 
 TESTS_REQUIRE = [
-    'pytest'
+    'pytest',
+    'setuptools_scm',
 ]
 
 EXTRAS_REQUIRE = {
@@ -26,7 +27,8 @@
 
 setup(
     name=PACKAGE_NAME,
-    version='0.0.0',
+    use_scm_version=True,
+    setup_requires=['setuptools_scm'],
     packages=find_packages(exclude=PACKAGE_EXCLUDES),
     package_data=PACKAGE_DATA,
     url='https://github.com/aodn',