Replace versioneer for setuptools-scm (#307)

Replace `versioneer` with `setuptools_scm` for getting Semver version of
Verde. `setuptools_scm` doesn't require to store additional files to work,
it can be installed and used through `setup.py`. Remove all `versioneer`
related files and mentions. Add `setuptools_scm` to `requirements.txt` and
`environment.yml`. Replace `setup.cfg` for `.flake8`. 
Related to fatiando/maintenance#4

setup.cfg → .flake8

@@ -1,10 +1,3 @@
-[versioneer]
-VCS = git
-style = pep440
-versionfile_source = verde/_version.py
-versionfile_build = verde/_version.py
-tag_prefix = ''
-
 [flake8]
 ignore = E203, E266, E501, W503, F401, E741
 max-line-length = 88

MANIFEST.in

@@ -4,7 +4,6 @@ include CODE_OF_CONDUCT.md
 include CONTRIBUTING.md
 include AUTHORS.md
 include requirements.txt
-include versioneer.py
 include verde/datasets/registry.txt
 recursive-include verde/tests/data *
 recursive-include verde/tests/baseline *

environment.yml

@@ -5,6 +5,7 @@ channels:
 dependencies:
     - python=3.7
     - pip
+    - setuptools_scm
     - numpy
     - scipy
     - pandas

requirements.txt

@@ -1,3 +1,4 @@
+setuptools_scm
 numpy
 scipy
 pandas

setup.py

@@ -1,12 +1,10 @@
 """
 Build and install the project.
 
-Uses versioneer to manage version numbers using git tags.
+Uses setuptools-scm to manage version numbers using git tags.
 """
 from setuptools import setup, find_packages
 
-import versioneer
-
 
 NAME = "verde"
 FULLNAME = "Verde"
@@ -20,8 +18,6 @@
 KEYWORDS = ""
 with open("README.rst") as f:
     LONG_DESCRIPTION = "".join(f.readlines())
-VERSION = versioneer.get_version()
-CMDCLASS = versioneer.get_cmdclass()
 CLASSIFIERS = [
     "Development Status :: 5 - Production/Stable",
     "Intended Audience :: Science/Research",
@@ -46,14 +42,20 @@
 with open("requirements.txt") as f:
     INSTALL_REQUIRES = f.readlines()
 PYTHON_REQUIRES = ">=3.6"
+# Configuration for setuptools-scm
+SETUP_REQUIRES = ["setuptools_scm"]
+USE_SCM_VERSION = {
+    "relative_to": __file__,
+    "local_scheme": "node-and-date",
+}
 
 if __name__ == "__main__":
     setup(
         name=NAME,
         fullname=FULLNAME,
         description=DESCRIPTION,
         long_description=LONG_DESCRIPTION,
-        version=VERSION,
+        use_scm_version=USE_SCM_VERSION,
         author=AUTHOR,
         author_email=AUTHOR_EMAIL,
         maintainer=MAINTAINER,
@@ -68,5 +70,5 @@
         keywords=KEYWORDS,
         install_requires=INSTALL_REQUIRES,
         python_requires=PYTHON_REQUIRES,
-        cmdclass=CMDCLASS,
+        setup_requires=SETUP_REQUIRES,
     )

verde/__init__.py

@@ -33,6 +33,10 @@
 from .projections import project_region, project_grid
 
 
+# Get the version number through setuptools-scm
+__version__ = version.version
+
+
 def test(doctest=True, verbose=True, coverage=False, figures=True):
     """
     Run the test suite.