clean up authors script

bin/tools/generate_authors.py

@@ -0,0 +1,47 @@
+#!/usr/bin/env python3
+
+import subprocess
+import re
+import os.path
+
+contribs = subprocess.check_output(['git', '--no-pager', 'shortlog', '-nse', 'HEAD'])
+contrib_lines = contribs.decode('utf-8').split('\n')
+
+format_regex = r'^\s*(?P<commit_count>\d+)\s*(?P<name>.*\w)\s*<(?P<email>[^\s]+)>$'
+
+def tuple_to_markdown(tuple):
+    return ('* [%s](mailto:%s)' % (tuple[0], tuple[1]))
+
+def line_to_tuple(line):
+    result = re.search(format_regex, line)
+    if result:
+        return (
+            result.group('commit_count'),
+            result.group('name'),
+            result.group('email')
+        )
+    else:
+        return ()
+
+tuples = map(line_to_tuple, contrib_lines)
+tuples = filter(lambda x: len(x) > 0, tuples)  # filter out empty results
+tuples = filter(lambda x: 'Jenkins' not in x[1], tuples) # filter out jenkins
+tuples = sorted(tuples, key=lambda x: x[0], reverse=True)
+tuples = map(lambda x: (x[1], x[2]), tuples)
+authors = map(tuple_to_markdown, tuples)
+authors = '\n'.join(authors)
+
+header = '# Authors'
+contents = '%s\n%s' % (header, authors)
+
+# write contents into contributors file
+base_dir_diff = 3
+current_dir = os.path.dirname(os.path.realpath(__file__))
+base_dir = current_dir
+
+for x in range(base_dir_diff):
+    base_dir = os.path.join(base_dir, os.pardir)
+
+contributors_file = os.path.join(base_dir, 'AUTHORS.md')
+with open(contributors_file, 'w') as f:
+    f.write(contents)