[PATCH] output parallel task execution result stats

tasks.py.count_results.patch

--- fabric/tasks.py	2017-04-24 19:28:00.000000000 -0400
+++ fabric/tasks.py.new	2017-10-13 09:41:45.617000206 -0400
@@ -409,6 +409,22 @@
             # This prevents Fabric from continuing on to any other tasks.
             # Otherwise, pull in results from the child run.
             ran_jobs = jobs.run()
+            print "----"
+            from collections import Counter
+            c = Counter()
+            failed_hosts = []
+            for name, d in ran_jobs.iteritems():
+                if d['exit_code'] == 0:
+                    c[0] += 1
+                else:
+                    c[1] += 1
+                    failed_hosts.append(name)
+
+            print "success: %s, failure: %s" % (c[0], c[1])
+            if failed_hosts:
+                print "failed_hosts: \n%s" % ("\n".join(failed_hosts))
+
+            print "----"
             for name, d in ran_jobs.iteritems():
                 if d['exit_code'] != 0:
                     if isinstance(d['results'], NetworkError) and \