# HG changeset patch
# User Steve Losh <steve@stevelosh.com>
# Date 1264038917 18000
# Node ID c00fff9956e66e1b070e4f38d1e92c5965522bb0
# Parent  b8afd9a5c913d59d744a11bae693eba64d9dbac1
Add the --delete-if-empty options for Desktop users.

diff -r b8afd9a5c913 -r c00fff9956e6 README
--- a/README	Mon Sep 28 23:19:42 2009 -0400
+++ b/README	Wed Jan 20 20:55:17 2010 -0500
@@ -128,6 +128,11 @@
     30 - Clean the entire apartment.
     $
 
+### Delete the Task List if it's Empty
+
+If you keep your task list in a visible place (like your desktop) you might want it to be deleted if there are no tasks in it.  To do this automatically you can use the `--delete-if-empty` option in your alias:
+
+    alias t='python ~/path/to/t.py --task-dir ~/Desktop --list todo.txt --delete-if-empty'
 
 Tips and Tricks
 ---------------
diff -r b8afd9a5c913 -r c00fff9956e6 t.py
--- a/t.py	Mon Sep 28 23:19:42 2009 -0400
+++ b/t.py	Wed Jan 20 20:55:17 2010 -0500
@@ -193,17 +193,20 @@
                 p = '%s - ' % task[label].ljust(plen) if not quiet else ''
                 print p + task['text']
     
-    def write(self):
+    def write(self, delete_if_empty=False):
         """Flush the finished and unfinished tasks to the files on disk."""
         filemap = (('tasks', self.name), ('done', '.%s.done' % self.name))
         for kind, filename in filemap:
             path = os.path.join(os.path.expanduser(self.taskdir), filename)
             if os.path.isdir(path):
                 raise InvalidTaskfile
-            with open(path, 'w') as tfile:
-                tasks = sorted(getattr(self, kind).values(), key=itemgetter('id'))
-                for taskline in _tasklines_from_tasks(tasks):
-                    tfile.write(taskline)
+            tasks = sorted(getattr(self, kind).values(), key=itemgetter('id'))
+            if tasks or not delete_if_empty:
+                with open(path, 'w') as tfile:
+                    for taskline in _tasklines_from_tasks(tasks):
+                        tfile.write(taskline)
+            elif not tasks and os.path.isfile(path):
+                os.remove(path)
     
 
 
@@ -225,6 +228,9 @@
                       help="work on LIST", metavar="LIST")
     config.add_option("-t", "--task-dir", dest="taskdir", default="",
                       help="work on the lists in DIR", metavar="DIR")
+    config.add_option("-d", "--delete-if-empty",
+                      action="store_true", dest="delete", default=False,
+                      help="delete the task file if it becomes empty")
     parser.add_option_group(config)
     
     output = OptionGroup(parser, "Output Options")
@@ -250,13 +256,13 @@
     try:
         if options.finish:
             td.finish_task(options.finish)
-            td.write()
+            td.write(options.delete)
         elif options.edit:
             td.edit_task(options.edit, text)
-            td.write()
+            td.write(options.delete)
         elif text:
             td.add_task(text)
-            td.write()
+            td.write(options.delete)
         else:
             td.print_list(verbose=options.verbose, quiet=options.quiet,
                           grep=options.grep)