add setup.py to support setuptools (easy_install/pip/etc.)

setup.py

@@ -0,0 +1,68 @@
+import os
+import subprocess
+
+from setuptools import setup, find_packages
+
+
+# Utility function to read the README file.
+# Used for the long_description.  It's nice, because now 1) we have a top level
+# README file and 2) it's easier to type in the README file than to put a raw
+# string in below ...
+def read(fname):
+    return open(os.path.join(os.path.dirname(__file__), fname)).read()
+
+
+# Utility function to determine version using git in a PEP-440 compatible way
+def get_git_version():
+    try:
+        output = subprocess.check_output(['git', 'describe', '--tags', '--dirty']).decode('utf-8').strip().split('-')
+        if len(output) == 1:
+            version = output[0]
+        elif len(output) == 2:
+            version = "{}.dev0".format(output[0])
+        else:
+            release = 'dev' if len(output) == 4 and output[3] == 'dirty' else ''
+            version = "{}.{}{}+{}".format(output[0], release, output[1], output[2])
+    except subprocess.CalledProcessError:
+        try:
+            commit = subprocess.check_output(['git', 'rev-parse', 'HEAD']).decode('utf-8').strip()
+            status = subprocess.check_output(['git', 'status', '-s']).decode('utf-8').strip()
+            version = "0.0.0.dev0+{}".format(commit) if len(status) > 0 else "0.0.0+{}".format(commit)
+        except subprocess.CalledProcessError:
+            version = "0.0.0"
+    return version
+
+
+setup(
+    name="acertmgr",
+    version=get_git_version(),
+    author="Markus Hauschild",
+    author_email="moepman@binary-kitchen.de",
+    description="An automated certificate manager using ACME/letsencrypt",
+    license="ISC",
+    keywords="acme letsencrypt",
+    url="https://github.com/moepman/acertmgr",
+    packages=find_packages(),
+    long_description=read('README.md'),
+    classifiers=[
+        "Development Status :: 3 - Alpha",
+        "License :: OSI Approved :: ISC License",
+    ],
+    install_requires=[
+        "cryptography",
+        "six",
+    ],
+    extras_require={
+        "dns.nsupdate": [
+            "dnspython",
+        ],
+        "yaml": [
+            "yaml",
+        ],
+    },
+    entry_points={
+        'console_scripts': [
+            'acertmgr=acertmgr:main',
+        ],
+    },
+)