[Findit] Add iterator and crash_iterator for delta test

appengine/findit/util_scripts/crash_queries/crash_printer/print_crash.py

Index: appengine/findit/util_scripts/crash_queries/crash_printer/print_crash.py
diff --git a/appengine/findit/util_scripts/crash_queries/crash_printer/print_crash.py b/appengine/findit/util_scripts/crash_queries/crash_printer/print_crash.py
new file mode 100644
index 0000000000000000000000000000000000000000..15af8f9034b445e7d17c8277da89d36949e22478
--- /dev/null
+++ b/appengine/findit/util_scripts/crash_queries/crash_printer/print_crash.py
@@ -0,0 +1,62 @@
+# Copyright 2016 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 argparse
+from datetime import date
+from datetime import timedelta
+import os
+import sys
+
+_SCRIPT_DIR = os.path.join(os.path.dirname(__file__), os.path.pardir,
+                           os.path.pardir)
+sys.path.insert(1, _SCRIPT_DIR)
+
+import script_util
+script_util.SetUpSystemPaths()
+from crash_queries.crash_printer import crash_printer
+
+_DATETIME_FORMAT = '%Y-%m-%d'
+_TODAY = date.today().strftime(_DATETIME_FORMAT)
+_A_YEAR_AGO = (date.today() - timedelta(days=365)).strftime(_DATETIME_FORMAT)
+
+
+if __name__ == '__main__':
+  argparser = argparse.ArgumentParser(
+      description='Print crashes.')
+
+  argparser.add_argument(
+      '--since',
+      '-s',
+      default=_A_YEAR_AGO,
+      help=('Query data since this date (including this date). '
+            'Should be in YYYY-MM-DD format. E.g. 2015-09-31. '
+            'Defaults to a year ago.'))
+
+  argparser.add_argument(
+      '--until',
+      '-u',
+      default=_TODAY,
+      help=('Query data until this date (not including this date). '
+            'Should be in YYYY-MM-DD format. E.g. 2015-09-31. '
+            'Defaults to today.'))
+
+  argparser.add_argument(
+      '--client',
+      '-c',
+      default='fracas',
+      help=('Possible values are: fracas, cracas, clusterfuzz. Right now, only '
+            'fracas is supported.'))
+
+  argparser.add_argument(
+      '--app',
+      '-a',
+      default=os.getenv('APP_ID', 'findit-for-me-dev'),
+      help=('App id of the App engine app that query needs to access. '
+            'Defualts to findit-for-me-dev. You can set enviroment variable by'
+            ' \'export APP_ID=your-app-id\' to replace the default value.'))
+
+  args = argparser.parse_args()
+
+  crash_printer.CrashPrinter(args.client, args.app,
+                             start_date=args.since, end_date=args.until)