Taskwarrior On-Modify Hook for 'stup' integration

onstart.hook

import sys
import json
import os

# Hook should extract all of the following for use as Timewarrior tags:
#   UUID
#   Project
#   Tags
#   Description
#   UDAs

# Make no changes to the task, simply observe.
old = json.loads(sys.stdin.readline())
new = json.loads(sys.stdin.readline())
print(json.dumps(new))

# Extract attributes for use as tags.
tags = [new['description']]

if 'project' in new:
  tags.append(new['project'])

if 'tags' in new:
  tags.extend(new['tags'])

combined = ' '.join(['"%s"' % tag for tag in tags]).encode('utf-8').strip()

# Started task.
if 'start' in new and not 'start' in old:
  os.system('timew start ' + combined + ' :yes')
  os.system('stup add -c ' + new['project'] + ' -n "' + new['description'] + '"')

# Stopped task.
elif not 'start' in new and 'start' in old:
  os.system('timew stop ' + combined + ' :yes')