Bug #1043

- Fixed bug where bash autocompletion did not work for aliases.
- Added new '_aliases' helper command.

src/commands/CmdAliases.cpp

@@ -0,0 +1,72 @@
+////////////////////////////////////////////////////////////////////////////////
+// taskwarrior - a command line task list manager.
+//
+// Copyright 2006-2012, Paul Beckingham, Federico Hernandez.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+// http://www.opensource.org/licenses/mit-license.php
+//
+////////////////////////////////////////////////////////////////////////////////
+
+#define L10N                                           // Localization complete.
+
+#include <sstream>
+#include <algorithm>
+#include <stdlib.h>
+#include <Context.h>
+#include <Command.h>
+#include <CmdAliases.h>
+#include <i18n.h>
+
+extern Context context;
+
+////////////////////////////////////////////////////////////////////////////////
+CmdCompletionAliases::CmdCompletionAliases ()
+{
+  _keyword     = "_aliases";
+  _usage       = "task          _aliases";
+  _description = STRING_CMD_ALIASES_USAGE;
+  _read_only   = true;
+  _displays_id = false;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+int CmdCompletionAliases::execute (std::string& output)
+{
+  // Get a list of all aliases.
+  std::vector <std::string> aliases;
+
+  std::map <std::string, std::string>::iterator it;
+  for (it = context.aliases.begin (); it != context.aliases.end (); ++it)
+    aliases.push_back (it->first);
+
+  // Sort alphabetically.
+  std::sort (aliases.begin (), aliases.end ());
+
+  std::stringstream out;
+  std::vector <std::string>::iterator a;
+  for (a = aliases.begin (); a != aliases.end (); ++a)
+    out << *a << "\n";
+
+  output = out.str ();
+  return 0;
+}
+
+////////////////////////////////////////////////////////////////////////////////