Update do_tasks.py.

do_tasks.py

@@ -1,32 +1,56 @@
 '''
 Execute the contents of all .task files forever.
 '''
+import argparse
 import os
+import send2trash
 import sys
 import time
 
-def main(args=None):
-    if args:
-        task_files = args
-        do_loop = False
-    else:
-        do_loop = True
 
+def get_task_files():
+    return [f for f in os.listdir() if (os.path.isfile(f) and f.endswith('.task'))]
+
+def do_tasks(task_files):
+    for task_file in task_files:
+        if not os.path.exists(task_file):
+            continue
+        with open(task_file, 'r', encoding='utf-8') as handle:
+            task_content = handle.read()
+        task_content = task_content.strip()
+        print('TASK:', task_content)
+        status = os.system(task_content)
+        if status == 0:
+            send2trash.send2trash(task_file)
+
+def do_tasks_forever():
     while True:
-        if do_loop:
-            task_files = [f for f in os.listdir() if (os.path.isfile(f) and f.endswith('.task'))]
-        for task_file in task_files:
-            with open(task_file, 'r', encoding='utf-8') as handle:
-                task_content = handle.read()
-            task_content = task_content.strip()
-            print('TASK:', task_content)
-            status = os.system(task_content)
-            if status == 0:
-                os.remove(task_file)
-        if not do_loop:
+        print(time.strftime('%H:%M:%S'), 'Looking for tasks.')
+        task_files = get_task_files()
+        do_tasks(task_files)
+        try:
+            time.sleep(10)
+        except KeyboardInterrupt:
             break
-        time.sleep(10)
 
+def do_tasks_argparse(args):
+    if args.task_files:
+        return do_tasks(args.task_files)
+
+    if args.only_once:
+        return do_tasks(get_task_files())
+
+    return do_tasks_forever()
+
+def main(argv):
+    parser = argparse.ArgumentParser(description=__doc__)
+
+    parser.add_argument('task_files', nargs='*', default=None)
+    parser.add_argument('--once', dest='only_once', action='store_true')
+    parser.set_defaults(func=do_tasks_argparse)
+
+    args = parser.parse_args(argv)
+    args.func(args)
 
 if __name__ == '__main__':
     raise SystemExit(main(sys.argv[1:]))