refactored setup.py to make sure we dont import ExtractMsg before ole…

…file has been installed

setup.py

@@ -1,14 +1,25 @@
 import glob
 import os
 from setuptools import setup
+import re
 
-import ExtractMsg
+
+# a handful of variables that are used a couple of times
+github_url = 'https://github.com/mattgwwalker/msg-extractor'
+main_module = 'ExtractMsg'
+main_script = main_module + '.py'
 
 # read in the description from README
 with open("README.md") as stream:
     long_description = stream.read()
 
-github_url = 'https://github.com/mattgwwalker/msg-extractor'
+# get the version from the ExtractMsg script. This can not be directly
+# imported because ExtractMsg imports olefile, which isn't installed yet
+version_re = re.compile("__version__ = '(?P<version>[0-9\.]*)'")
+with open(main_script, 'r') as stream:
+    contents = stream.read()
+match = version_re.search(contents)
+version = match.groupdict()['version']
 
 # read in the dependencies from the virtualenv requirements file
 dependencies = []
@@ -20,16 +31,16 @@
             dependencies.append(package)
 
 setup(
-    name="ExtractMsg",
-    version=ExtractMsg.__version__,
+    name=main_module,
+    version=version,
     description="Extracts emails and attachments saved in Microsoft Outlook's .msg files",
     long_description=long_description,
     url=github_url,
     download_url="%s/archives/master" % github_url,
     author='Matthew Walker',
     author_email='mattgwwalker at gmail.com',
     license='GPL',
-    scripts=["ExtractMsg.py"],
-    py_modules=["ExtractMsg"],
+    scripts=[main_script],
+    py_modules=[main_module],
     install_requires=dependencies,
 )