Add makefile with publish command

Makefile

@@ -0,0 +1,6 @@
+VERSION:=$(shell python setup.py --version)
+
+publish:
+	python setup.py sdist upload
+	git tag -a $(VERSION) -m 'version $(VERSION)'
+	git push --tags

docs/main/changelog.rst

@@ -10,6 +10,7 @@ follows `Semantic versioning`_
 Development version
 -------------------
 - Remove ``@inject`` decorator.
+- Add makefile.
 
 .. - No features.
 

setup.py

@@ -1,10 +1,8 @@
 """`Dependency injector` setup script."""
 
-import os
 import re
 
 from setuptools import setup
-from setuptools import Command
 
 
 # Getting description:
@@ -20,26 +18,6 @@ with open('dependency_injector/__init__.py') as init_file:
     version = re.search('VERSION = \'(.*?)\'', init_file.read()).group(1)
 
 
-class PublishCommand(Command):
-    """Setuptools `publish` command."""
-
-    description = "Publish current distribution to PyPi and create tag"
-    user_options = []
-
-    def initialize_options(self):
-        """Init options."""
-
-    def finalize_options(self):
-        """Finalize options."""
-
-    def run(self):
-        """Command execution."""
-        self.run_command('sdist')
-        self.run_command('upload')
-        os.system('git tag -a {0} -m \'version {0}\''.format(version))
-        os.system('git push --tags')
-
-
 setup(name='dependency-injector',
       version=version,
       description='Dependency injection microframework for Python',
@@ -58,9 +36,6 @@ setup(name='dependency-injector',
       platforms=['any'],
       zip_safe=True,
       install_requires=requirements,
-      cmdclass={
-          'publish': PublishCommand,
-      },
       keywords=[
           'DI',
           'Dependency injection',