Add taskwarrior config

.config/task/hooks/on-modify.timewarrior

@@ -0,0 +1,67 @@
+#!/usr/bin/env python3
+'''Timewarrior on-modify hook to call timew on start,stop, done commands.'''
+import json
+import shlex
+import subprocess
+import sys
+
+def retrieve_args_dict():
+    '''Read process arguments and store them in a dictionary.'''
+    process_args = sys.argv[1:]
+    dictionary = dict()
+    for process_arg in process_args:
+        splitted = process_arg.split(':')
+        if len(splitted) > 1:
+            key = splitted[0]
+            value = ''.join(splitted[1:])
+            dictionary[key] = value
+    return dictionary
+
+def determine_timew_tags(task):
+    '''Determine which timew "tags" should be used for the task.'''
+    tags = list()
+
+    # Keys associated with one value
+    for key in ['uuid', 'project', 'description']:
+        if key in task:
+            tags.append('{}:{}'.format(key, task[key]))
+
+    # Keys associated with several values
+    if 'tags' in task:
+        for value in task['tags']:
+            tags.append('tag:{}'.format(value))
+
+    return tags
+
+def generate_timew_command(cmd, tags):
+    '''Generate an input for subprocess.call.'''
+    tags_as_string = ' '.join([shlex.quote(tag) for tag in tags])
+    if cmd == 'done':
+        cmd = 'stop'
+    cmd_string = f'timew {cmd} {tags_as_string} :yes'
+    return shlex.split(cmd_string)
+
+def main():
+    '''Main function of this module.'''
+    old_task = json.loads(sys.stdin.readline())
+    new_task = json.loads(sys.stdin.readline())
+    args = retrieve_args_dict()
+
+    # Do something.
+    feedback = None
+    if 'api' in args: # Only do something for known API.
+        if args['api'] in ['2']: # APIs that give us a 'command' key.
+            cmd = args['command']
+            if cmd in ['start', 'stop', 'done']: # Only do something on 'start', 'stop' or 'done'
+                timew_tags = determine_timew_tags(new_task)
+                timew_cmd = generate_timew_command(cmd, timew_tags)
+                subprocess.call(timew_cmd)
+
+    # Generate output as task expects it.
+    print(json.dumps(new_task))
+    if feedback is not None:
+        print(feedback)
+    sys.exit(0)
+
+if __name__ == "__main__":
+    main()