Feature - simple version report for scripts

- Added a simple _version command that displays only the version
  number and a newline.  This makes it easier for external task support
  scripts to determine which version of task is installed - easier than
  parsing the version command output.

src/Cmd.cpp

@@ -110,6 +110,7 @@ void Cmd::load ()
     commands.push_back ("_commands");
     commands.push_back ("_ids");
     commands.push_back ("_config");
+    commands.push_back ("_version");
     commands.push_back (context.stringtable.get (CMD_ADD,       "add"));
     commands.push_back (context.stringtable.get (CMD_APPEND,    "append"));
     commands.push_back (context.stringtable.get (CMD_ANNOTATE,  "annotate"));
@@ -192,6 +193,7 @@ bool Cmd::isReadOnlyCommand ()
       command == "_commands"                                          ||
       command == "_ids"                                               ||
       command == "_config"                                            ||
+      command == "_version"                                           ||
       command == context.stringtable.get (CMD_CALENDAR,  "calendar")  ||
       command == context.stringtable.get (CMD_COLORS,    "colors")    ||
       command == context.stringtable.get (CMD_EXPORT,    "export")    ||

src/Context.cpp

@@ -221,6 +221,7 @@ int Context::dispatch (std::string &out)
   else if (cmd.command == "_commands")     { rc = handleCompletionCommands (out); }
   else if (cmd.command == "_ids")          { rc = handleCompletionIDs      (out); }
   else if (cmd.command == "_config")       { rc = handleCompletionConfig   (out); }
+  else if (cmd.command == "_version")      { rc = handleCompletionVersion  (out); }
   else if (cmd.command == "" &&
            sequence.size ())               { rc = handleModify             (out); }
 

src/command.cpp

@@ -373,6 +373,16 @@ int handleCompletionConfig (std::string &outs)
   return 0;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// A simple version display for use by completion scripts and the task-update
+// script.
+int handleCompletionVersion (std::string &outs)
+{
+  outs = VERSION;
+  outs += "\n";
+  return 0;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 int handleCompletionIDs (std::string &outs)
 {

src/main.h

@@ -68,6 +68,7 @@ int handleCompletionTags (std::string &);
 int handleCompletionCommands (std::string &);
 int handleCompletionIDs (std::string &);
 int handleCompletionConfig (std::string &);
+int handleCompletionVersion (std::string &);
 int handleVersion (std::string &);
 int handleDelete (std::string &);
 int handleStart (std::string &);