- Added licesne.

- Added proper README.
- Added dry run mode.
- Added argument handling, usage.
- Bumped version to 0.3.0.

LICENSE.txt

+The MIT License (MIT)
+
+Copyright (c) [year] [fullname]
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

MANIFEST.in

 recursive-include eb-prune *.py
 exclude .pre-commit-config.yaml
-include README.rst
+include *.rst
+include *.txt
 include VERSION

README.rst

 eb-prune
 ########
 
-Must specify AWS_DEFAULT_REGION environment variable.
+A CLI tool to prune old versions of Elastic Beanstalk.
 
-TODO
-----
+Installation
+------------
 
-- License.
-- Changelog.
-- README,
-- Specify number of versions to keep, dry-run option.
+.. code:: shell
+
+    pip install eb-prune
+
+Usage
+-----
+
+To keep the last 100 versions available, simply run :code:`eb-prune 100`. The
+tool relies on the usual AWS CLI configuration as described `here
+<http://docs.aws.amazon.com/cli/latest/topic/config-vars.html>`_, specifically
+on access key id, secret access key and region.
+
+.. code:: shell
+
+    $ eb-prune --help
+    usage: eb-prune [-h] [-d] versions_to_keep
+
+    positional arguments:
+      versions_to_keep  The number of versions to keep.
+
+      optional arguments:
+        -h, --help        show this help message and exit
+        -d, --dry-run     Dry run, do not delete versions.
+
+License
+-------
+
+This software is licnesed under the MIT licese (see the :code:`LICENSE.txt`
+file).
+
+Author
+------
+
+Nimrod Adar, `contact me <nimrod@shore.co.il>`_ or visit my `website
+<https://www.shore.co.il/>`_. Patches are welcome via `git send-email
+<http://git-scm.com/book/en/v2/Git-Commands-Email>`_. The repository is located
+at: https://www.shore.co.il/git/.

VERSION

-0.2.1
+0.3.0
\ No newline at end of file

eb_prune/__init__.py

@@ -2,26 +2,30 @@
 '''Prune older versions of an application in Elastic Beanstalk.'''
 from __future__ import (absolute_import, division,
                         print_function, unicode_literals)
+from argparse import ArgumentParser
 from botocore import session
 
 
-def main():
-    versions_to_keep = 400
-    dry_run = False
+def prune(versions_to_keep, dry_run):
+    if dry_run:
+        print('DRY RUN! NOTHING WILL BE REMOVED.')
     print('Pruning Elastic Beanstalk versions.')
     aws_session = session.get_session()
     beanstalk_client = aws_session.create_client('elasticbeanstalk')
     response = beanstalk_client.describe_application_versions()
     if response['ResponseMetadata']['HTTPStatusCode'] != 200:
         raise RuntimeError('Failed to describe application versions.')
+    # Get all EB versions.
     versions = response['ApplicationVersions']
     response = beanstalk_client.describe_environments()
     if response['ResponseMetadata']['HTTPStatusCode'] != 200:
         raise RuntimeError('Failed to describe environments.')
+    # Remove the currently in-use versions from the list.
     active_versions = [env['VersionLabel'] for env in response['Environments']]
     previous_versions = filter(
         lambda x: (not x['VersionLabel'] in active_versions) and
         x['Status'] == 'UNPROCESSED', versions)
+    # Remove the newest versions from the list.
     old_versions = sorted(previous_versions,
                           key=lambda x:
                           x.get('DateCreated'))[:-versions_to_keep]
@@ -40,5 +44,17 @@ def main():
     print('Deleted {0} versions.'.format(len(old_versions)))
 
 
+def main():
+    parser = ArgumentParser()
+    parser.add_argument('versions_to_keep',
+                        help='The number of versions to keep.',
+                        type=int)
+    parser.add_argument('-d', '--dry-run',
+                        help='Dry run, do not delete versions.',
+                        action='store_true')
+    args = parser.parse_args()
+    prune(args.versions_to_keep, args.dry_run)
+
+
 if __name__ == '__main__':
     main()

tox.ini

@@ -13,6 +13,7 @@ commands =
     check-manifest --ignore tox.ini,tests*
     python setup.py check -m -r -s
     flake8 .
+    eb-prune --help
 
 [testenv:release]
 basepython = python