Merged be.restructure, major internal reorganization.

Added a bunch of classes to make the commands, user interfaces, and
storage backends more abstract and distinct.  This should make it much
easier to extend and maintain BE.

Features:
 * Directory restructured:
   becommands/ -> libbe/commands
   submods sorted by functionality.
 * Lots of new classes:
   Option, Argument, Command
   InputOutput, StorageCallbacks, UserInterface
   Storage
 * Consolidated ID handling in libbe.util.id
 * Transitioned VCS backends for Python-based VCSs from subprocess
   calss to internal python calls.

Plus the user-visible changes:
 * New bugdir/bug/comment ID format replaces old bug:comment format.
 * Deprecated support for `be diff` on Arch and Darcs <= 2.3.1.  A new
   backend abstraction (Storage) makes the former implementation
   ungainly.
 * Improved command completion.
 * Removed commands close, open, email_bugs, 
 * Flipped some arguments
   `be assign BUG-ID [ASSIGNEE]` -> `be status ASSIGNED BUG-ID ...`
   `be severity BUG-ID SEVERITY` -> `be severity SEVERITY BUG-ID ...`
   `be status BUG-ID STATUS` -> `be status STATUS BUG-ID ...`

In the merge:
  * Added 'commit' to list of pagerless commands.
  * Updated doc/README.dev

See
#bea86499-824e-4e77-b085-2d581fa9ccab/1100c966-9671-4bc6-8b68-6d408a910da1#
for a discussion of why the changes were made and some of the
difficulties en-route.

1 files changed, 117 insertions, 0 deletions

diff --git a/libbe/command/due.py b/libbe/command/due.py
new file mode 100644
index 0000000..2eb3194
--- /dev/null
+++ b/libbe/command/due.py
@@ -0,0 +1,117 @@
+# Copyright (C) 2009 W. Trevor King <wking@drexel.edu>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+import libbe
+import libbe.command
+import libbe.command.util
+import libbe.util.utility
+
+
+DUE_TAG = 'DUE:'
+
+
+class Due (libbe.command.Command):
+    """Set bug due dates
+
+    >>> import sys
+    >>> import libbe.bugdir
+    >>> bd = libbe.bugdir.SimpleBugDir(memory=False)
+    >>> io = libbe.command.StringInputOutput()
+    >>> io.stdout = sys.stdout
+    >>> ui = libbe.command.UserInterface(io=io)
+    >>> ui.storage_callbacks.set_storage(bd.storage)
+    >>> cmd = Due(ui=ui)
+
+    >>> ret = ui.run(cmd, args=['/a'])
+    No due date assigned.
+    >>> ret = ui.run(cmd, args=['/a', 'Thu, 01 Jan 1970 00:00:00 +0000'])
+    >>> ret = ui.run(cmd, args=['/a'])
+    Thu, 01 Jan 1970 00:00:00 +0000
+    >>> ret = ui.run(cmd, args=['/a', 'none'])
+    >>> ret = ui.run(cmd, args=['/a'])
+    No due date assigned.
+    >>> ui.cleanup()
+    >>> bd.cleanup()
+    """
+    name = 'due'
+
+    def __init__(self, *args, **kwargs):
+        libbe.command.Command.__init__(self, *args, **kwargs)
+        self.args.extend([
+                libbe.command.Argument(
+                    name='bug-id', metavar='BUG-ID',
+                    completion_callback=libbe.command.util.complete_bug_id),
+                libbe.command.Argument(
+                    name='due', metavar='DUE', optional=True),
+                ])
+
+    def _run(self, **params):
+        bugdir = self._get_bugdir()
+        bug,dummy_comment = libbe.command.util.bug_comment_from_user_id(
+            bugdir, params['bug-id'])
+        if params['due'] == None:
+            due_time = get_due(bug)
+            if due_time is None:
+                print >> self.stdout, 'No due date assigned.'
+            else:
+                print >> self.stdout, libbe.util.utility.time_to_str(due_time)
+        else:
+            if params['due'] == 'none':
+                remove_due(bug)
+            else:
+                due_time = libbe.util.utility.str_to_time(params['due'])
+                set_due(bug, due_time)
+
+    def _long_help(self):
+        return """
+If no DATE is specified, the bug's current due date is printed.  If
+DATE is specified, it will be assigned to the bug.
+"""
+
+# internal helper functions
+
+def _generate_due_string(time):
+    return "%s%s" % (DUE_TAG, libbe.util.utility.time_to_str(time))
+
+def _parse_due_string(string):
+    assert string.startswith(DUE_TAG)
+    return libbe.util.utility.str_to_time(string[len(DUE_TAG):])
+
+# functions exposed to other modules
+
+def get_due(bug):
+    matched = []
+    for line in bug.extra_strings:
+        if line.startswith(DUE_TAG):
+            matched.append(_parse_due_string(line))
+    if len(matched) == 0:
+        return None
+    if len(matched) > 1:
+        raise Exception('Several due dates for %s?:\n  %s'
+                        % (bug.uuid, '\n  '.join(matched)))
+    return matched[0]
+
+def remove_due(bug):
+    estrs = bug.extra_strings
+    for due_str in [s for s in estrs if s.startswith(DUE_TAG)]:
+        estrs.remove(due_str)
+    bug.extra_strings = estrs # reassign to notice change
+
+def set_due(bug, time):
+    remove_due(bug)
+    estrs = bug.extra_strings
+    estrs.append(_generate_due_string(time))
+    bug.extra_strings = estrs # reassign to notice change