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Tools/Scripts/webkitpy/common/net/sheriff_calendar.py

Index: Tools/Scripts/webkitpy/common/net/sheriff_calendar.py
diff --git a/Tools/Scripts/webkitpy/common/net/sheriff_calendar.py b/Tools/Scripts/webkitpy/common/net/sheriff_calendar.py
new file mode 100644
index 0000000000000000000000000000000000000000..bb60fca8a8b173c03b9df45f7b22d7424b6960d6
--- /dev/null
+++ b/Tools/Scripts/webkitpy/common/net/sheriff_calendar.py
@@ -0,0 +1,59 @@
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import re
+import urllib2
+
+# This is based on code from:
+# https://chromium.googlesource.com/chromium/tools/build/+/master/scripts/tools/blink_roller/auto_roll.py
+# Ideally we should share code between these.
+
+# FIXME: This probably belongs in config.py?
+BLINK_SHERIFF_URL = (
+    'http://build.chromium.org/p/chromium.webkit/sheriff_webkit.js')
+
+
+# Does not support unicode or special characters.
+VALID_EMAIL_REGEXP = re.compile(r'^[A-Za-z0-9\.&\'\+-/=_]+@[A-Za-z0-9\.-]+$')
+
+
+def _complete_email(name):
+    """If the name does not include '@', append '@chromium.org'."""
+    if '@' not in name:
+        return name + '@chromium.org'
+    return name
+
+
+def _names_from_sheriff_js(sheriff_js):
+    match = re.match(r'document.write\(\'(.*)\'\)', sheriff_js)
+    emails_string = match.group(1)
+    # Detect 'none (channel is sheriff)' text and ignore it.
+    if 'channel is sheriff' in emails_string.lower():
+        return []
+    return map(str.strip, emails_string.split(','))
+
+
+def _email_is_valid(email):
+    """Determines whether the given email address is valid."""
+    return VALID_EMAIL_REGEXP.match(email) is not None
+
+
+def _filter_emails(emails):
+    """Returns the given list with any invalid email addresses removed."""
+    rv = []
+    for email in emails:
+        if _email_is_valid(email):
+            rv.append(email)
+        else:
+            print 'WARNING: Not including %s (invalid email address)' % email
+    return rv
+
+
+def _emails_from_url(sheriff_url):
+    sheriff_js = urllib2.urlopen(sheriff_url).read()
+    return map(_complete_email, _names_from_sheriff_js(sheriff_js))
+
+
+def current_gardener_emails():
+    return _emails_from_url(BLINK_SHERIFF_URL)