Cleanup: move most pkg metadata info to setup.py

Makefile

@@ -10,7 +10,7 @@ dogfood:
 	git diff | ./ydiff.py -s
 
 lint:
-	pycodestyle --ignore=E203,W503,W504 *.py */*.py
+	pycodestyle --ignore=W503,W504 *.py */*.py
 
 doc-check:
 	./setup.py --long-description | rst2html.py --strict > /dev/null

setup.py

@@ -2,7 +2,7 @@
 # -*- coding: utf-8 -*-
 
 from setuptools import setup
-from ydiff import PKG_INFO
+from ydiff import __version__, __homepage__, __description__
 
 with open('README.rst') as doc:
     long_description = doc.read()
@@ -11,13 +11,13 @@
 
 setup(
     name='ydiff',
-    version=PKG_INFO['version'],
-    author=PKG_INFO['author'],
-    license=PKG_INFO['license'],
-    description=PKG_INFO['description'],
+    version=__version__,
+    author='Matt Wang',
+    license='BSD-3',
+    description=__description__,
     long_description=long_description,
-    keywords=PKG_INFO['keywords'],
-    url=PKG_INFO['url'],
+    keywords='colored incremental side-by-side diff',
+    url=__homepage__,
     # See https://pypi.python.org/pypi?%3Aaction=list_classifiers
     classifiers=[
         'Development Status :: 5 - Production/Stable',

ydiff.py

@@ -1,11 +1,6 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
-"""
-Terminmal based tool to view colored, incremental diffs in a version-controlled
-workspace or from stdin, in side-by-side or unified mode, and auto paged.
-"""
-
 import difflib
 import os
 import re
@@ -15,15 +10,10 @@
 import sys
 import unicodedata
 
-PKG_INFO = {
-    'version'     : '1.4.2',
-    'license'     : 'BSD-3',
-    'author'      : 'Matt Wang',
-    'url'         : 'https://github.com/ymattw/ydiff',
-    'keywords'    : 'colored incremental side-by-side diff',
-    'description' : ('View colored, incremental diff in a workspace or from '
-                     'stdin, in side-by-side or unified moded, and auto paged')
-}
+__version__ = '1.4.2'
+__homepage__ = 'https://github.com/ymattw/ydiff'
+__description__ = ('View colored, incremental diff in a workspace or from '
+                   'stdin, in side-by-side or unified moded, and auto paged')
 
 if sys.hexversion < 0x03030000:
     raise SystemExit('*** Requires python >= 3.3.0')    # pragma: no cover
@@ -756,8 +746,8 @@ def _process_args(self, largs, rargs, values):
 
     usage = """%prog [options] [file|dir ...]"""
     parser = _PassThroughOptionParser(
-        usage=usage, description=PKG_INFO['description'],
-        version='%%prog %s' % PKG_INFO['version'])
+        usage=usage, description=__description__,
+        version='%%prog %s' % __version__)
     parser.add_option(
         '-s', '--side-by-side', action='store_true', default=True,
         help='enable side-by-side mode (default True; DEPRECATED)')