rename no_parallel_processes

src/watchdog/tricks/__init__.py

@@ -79,18 +79,18 @@ class ShellCommandTrick(Trick):
 
     def __init__(self, shell_command=None, patterns=None, ignore_patterns=None,
                  ignore_directories=False, wait_for_process=False,
-                 no_parallel_processes=False):
+                 drop_during_process=False):
         super(ShellCommandTrick, self).__init__(patterns, ignore_patterns,
                                                 ignore_directories)
         self.shell_command = shell_command
         self.wait_for_process = wait_for_process
-        self.no_parallel_processes = no_parallel_processes
+        self.drop_during_process = drop_during_process
         self.process = None
 
     def on_any_event(self, event):
         from string import Template
-        
-        if self.no_parallel_processes and self.process and self.process.poll() is None:
+
+        if self.drop_during_process and self.process and self.process.poll() is None:
             return
 
         if event.is_directory:

src/watchdog/watchmedo.py

@@ -412,11 +412,12 @@ def log(args):
      action='store_true',
      default=False,
      help="wait for process to finish to avoid multiple simultaneous instances")
-@arg('-n', '--no-parallel',
-     dest='no_parallel_processes',
+@arg('-W', '--drop',
+     dest='drop_during_process',
      action='store_true',
      default=False,
-     help="Ignore events that happen while the previous process is still running")
+     help="Ignore events that occur while command is still being executed " \
+          "to avoid multiple simultaneous instances")
 def shell_command(args):
     """
     Subcommand to execute shell commands in response to file system events.
@@ -437,7 +438,7 @@ def shell_command(args):
                                 ignore_patterns=ignore_patterns,
                                 ignore_directories=args.ignore_directories,
                                 wait_for_process=args.wait_for_process,
-                                no_parallel_processes=args.no_parallel_processes)
+                                drop_during_process=args.drop_during_process)
     observer = Observer(timeout=args.timeout)
     observe_with(observer, handler, args.directories, args.recursive)