Command Usage

- Enhanced CmdHelp by adding aliases.
- Corrected usage for CmdModify.
- Renamed CmdQuery --> CmdExport.
- Added an alias _query --> export.

src/commands/CmdExport.cpp

@@ -0,0 +1,96 @@
+////////////////////////////////////////////////////////////////////////////////
+// taskwarrior - a command line task list manager.
+//
+// Copyright 2006 - 2011, Paul Beckingham, Federico Hernandez.
+// All rights reserved.
+//
+// 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
+//
+////////////////////////////////////////////////////////////////////////////////
+
+#define L10N                                           // Localization complete.
+
+#include <Context.h>
+#include <main.h>
+#include <i18n.h>
+#include <CmdExport.h>
+
+extern Context context;
+
+////////////////////////////////////////////////////////////////////////////////
+CmdExport::CmdExport ()
+{
+  _keyword     = "export";
+  _usage       = "task export [<filter>]";
+  _description = STRING_CMD_EXPORT_USAGE;
+  _read_only   = true;
+  _displays_id = true;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+int CmdExport::execute (std::string& output)
+{
+  int rc = 0;
+
+  // Get all the tasks.
+  std::vector <Task> tasks;
+  context.tdb.lock (context.config.getBoolean ("locking"));
+  handleRecurrence ();
+  context.tdb.load (tasks);
+  context.tdb.commit ();
+  context.tdb.unlock ();
+
+  // Apply filter.
+  std::vector <Task> filtered;
+  filter (tasks, filtered);
+
+  if (filtered.size () == 0)
+  {
+    context.footnote (STRING_FEEDBACK_NO_MATCH);
+    return 1;
+  }
+
+  // Note: "limit:" feature not supported.
+  // TODO Why not?
+
+  // Is output contained within a JSON array?
+  bool json_array = context.config.getBoolean ("json.array");
+
+  // Compose output.
+  if (json_array)
+    output += "[\n";
+
+  std::vector <Task>::iterator task;
+  for (task = filtered.begin (); task != filtered.end (); ++task)
+  {
+    if (task != filtered.begin ())
+      output += ",\n";
+
+    output += task->composeJSON (true);
+  }
+
+  if (json_array)
+    output += "\n]";
+
+  output += "\n";
+  return rc;
+}
+
+////////////////////////////////////////////////////////////////////////////////