commit 0046fa3020ef8b716e381c901c55e7621141ba0c
Author: neingeist <neingeist@bl0rg.net>
Date:   Tue Sep 2 21:36:25 2014 +0200

    initial commit

diff --git a/task-recurring-delete b/task-recurring-delete
new file mode 100755
index 0000000..444afcc
--- /dev/null
+++ b/task-recurring-delete
@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+# For taskwarrior users:
+# Delete all overdue & duplicate tasks and keep only the first of a kind.
+#
+# Needs the taskw Python bindings to run.
+
+__requires__ = ["taskw >= 0.8.3"]
+import pkg_resources
+
+from subprocess import Popen, PIPE, STDOUT
+from uuid import UUID
+
+import collections
+import datetime
+import os
+import pytz
+import taskw
+
+
+def task_delete(uuid):
+    """Delete the given task."""
+
+    assert isinstance(uuid, UUID)
+
+    # This is somewhat a hack, but as TaskWwarrior 2.4.0 does NOT disable
+    # the 'Do you want to delete all pending recurrences ...' confirmation
+    # on rc.confirmation=off, so this is necessary.
+    DEVNULL = open(os.devnull, 'wb')
+    p = Popen(['task', 'rc.confirmation=off', str(uuid), 'delete'],
+              stdin=PIPE, stdout=DEVNULL, stderr=STDOUT)
+    p.communicate(input=bytes('no', 'UTF-8'))
+
+
+w = taskw.TaskWarrior(marshal=True)
+tasks = w.load_tasks()
+
+
+# Only (over-)due and recurring tasks are considered for deletion:
+due_before = datetime.datetime.utcnow()
+due_before = due_before.replace(tzinfo=pytz.utc)
+recurring_tasks_due = [task for task in tasks['pending']
+                            if 'recur' in task
+                               and 'parent' in task
+                               and 'due' in task and task['due'] < due_before]
+
+# Delete all but the first of all (over-)due and duplicate tasks:
+parents = collections.Counter([task['parent']
+                               for task in recurring_tasks_due])
+for parent in parents:
+    count = parents[parent]
+    if count > 1:
+        dupe_tasks = [task for task in recurring_tasks_due
+                           if task['parent'] == parent]
+        dupe_tasks = sorted(dupe_tasks, key=lambda t: t['due'])
+
+        dupe_tasks_to_keep = dupe_tasks[0:1]
+        dupe_tasks_to_trash = dupe_tasks[1:]
+
+        print('Deleting {} duplicate due tasks: "{}"'.format(
+            len(dupe_tasks_to_trash), dupe_tasks_to_trash[0]['description']))
+        for task in dupe_tasks_to_trash:
+            task_delete(task['uuid'])