#  from [b0c21243f7f344006c05aebb2b4f5c9f9ee6ccfd]
#    to [221b45f4b0c008da11516b07ca2048fc2a21ce03]
--- 
+++ 
@@ -0,0 +1,983 @@
+// Copyright (C) 2002 Graydon Hoare <address@hidden>
+//               2007 Julio M. Merino Vidal <address@hidden>
+//
+// This program is made available under the GNU GPL version 2.0 or
+// greater. See the accompanying file COPYING for details.
+//
+// This program is distributed WITHOUT ANY WARRANTY; without even the
+// implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+// PURPOSE.
+
+#include "base.hh"
+#include "cmd.hh"
+
+#include "lua.hh"
+#include "app_state.hh"
+#include "options_applicator.hh"
+#include "work.hh"
+#include "ui.hh"
+#include "mt_version.hh"
+#include "charset.hh"
+#include "simplestring_xform.hh"
+#include "vocab_cast.hh"
+
+#ifndef _WIN32
+#include <signal.h>
+#include <errno.h>
+#endif
+
+#ifdef WIN32
+#include <io.h>
+#endif
+
+#include <iostream>
+#include <cstring>
+
+using std::string;
+using std::stringstream;
+using std::vector;
+using std::set;
+using std::ostream;
+using std::make_pair;
+using std::cout;
+using boost::lexical_cast;
+
+//
+// Definition of top-level commands, used to classify the real commands
+// in logical groups.
+//
+// These top level commands, while part of the final identifiers and defined
+// as regular command groups, are handled separately.  The user should not
+// see them except through the help command.
+//
+// XXX This is to easily maintain compatibilty with older versions.  But
+// maybe this should be revised, because exposing the top level category
+// (being optional, of course), may not be a bad idea.
+//
+
+CMD_GROUP(__root__, "__root__", "", NULL, "", "");
+
+CMD_GROUP_NO_COMPLETE(automation, "automation", "", CMD_REF(__root__),
+                      N_("Commands that aid in scripted execution"),
+                      "");
+CMD_GROUP(database, "database", "", CMD_REF(__root__),
+          N_("Commands that manipulate the database"),
+          "");
+CMD_GROUP(debug, "debug", "", CMD_REF(__root__),
+          N_("Commands that aid in program debugging"),
+          "");
+CMD_GROUP(informative, "informative", "", CMD_REF(__root__),
+          N_("Commands for information retrieval"),
+          "");
+CMD_GROUP(key_and_cert, "key_and_cert", "", CMD_REF(__root__),
+          N_("Commands to manage keys and certificates"),
+          "");
+CMD_GROUP(network, "network", "", CMD_REF(__root__),
+          N_("Commands that access the network"),
+          "");
+CMD_GROUP(packet_io, "packet_io", "", CMD_REF(__root__),
+          N_("Commands for packet reading and writing"),
+          "");
+CMD_GROUP(vcs, "vcs", "", CMD_REF(__root__),
+          N_("Commands for interaction with other version control systems"),
+          "");
+CMD_GROUP(review, "review", "", CMD_REF(__root__),
+          N_("Commands to review revisions"),
+          "");
+CMD_GROUP(tree, "tree", "", CMD_REF(__root__),
+          N_("Commands to manipulate the tree"),
+          "");
+CMD_GROUP(variables, "variables", "", CMD_REF(__root__),
+          N_("Commands to manage persistent variables"),
+          "");
+CMD_GROUP(workspace, "workspace", "", CMD_REF(__root__),
+          N_("Commands that deal with the workspace"),
+          "");
+CMD_GROUP(user, "user", "", CMD_REF(__root__),
+          N_("Commands defined by the user"),
+          "");
+
+namespace commands {
+
+  void remove_command_name_from_args(command_id const & ident,
+                                     args_vector & args,
+                                     size_t invisible_length)
+  {
+    MM(ident);
+    MM(args);
+    MM(invisible_length);
+    I(ident.empty() || args.size() >= ident.size() - invisible_length);
+    for (args_vector::size_type i = invisible_length; i < ident.size(); i++)
+      {
+        I(ident[i]().find(args[0]()) == 0);
+        args.erase(args.begin());
+      }
+  }
+
+  void reapply_options(app_state & app,
+                       command const * cmd,
+                       command_id const & cmd_ident,
+                       command const * subcmd,
+                       command_id const & subcmd_full_ident,
+                       size_t subcmd_invisible_length,
+                       args_vector const & subcmd_cmdline,
+                       vector<pair<string, string> > const * const separate_params)
+  {
+    I(cmd);
+    options::opts::all_options().instantiate(&app.opts).reset();
+
+    cmd->preset_options(app.opts);
+
+    option::concrete_option_set optset
+      = (options::opts::globals() | cmd->opts())
+      .instantiate(&app.opts);
+
+    optset.from_command_line(app.reset_info.default_args);
+
+    if (subcmd)
+      {
+        args_vector subcmd_defaults;
+        app.lua.hook_get_default_command_options(subcmd_full_ident,
+                                                 subcmd_defaults);
+        (options::opts::globals() | subcmd->opts())
+          .instantiate(&app.opts)
+          .from_command_line(subcmd_defaults);
+      }
+
+    // at this point we process the data from _MTN/options if
+    // the command needs it.
+    if ((subcmd ? subcmd : cmd)->use_workspace_options())
+      {
+        workspace::check_format();
+        workspace::get_options(app.opts);
+      }
+
+    optset.from_command_line(app.reset_info.cmdline_args);
+
+    if (subcmd)
+      {
+        app.opts.args.clear();
+        option::concrete_option_set subcmd_optset
+          = (options::opts::globals() | subcmd->opts())
+          .instantiate(&app.opts);
+        if (!separate_params)
+          {
+            /* the first argument here is only ever modified if the second is 'true' */
+            subcmd_optset.from_command_line(const_cast<args_vector &>(subcmd_cmdline));
+          }
+        else
+          {
+            subcmd_optset.from_key_value_pairs(*separate_params);
+            app.opts.args = subcmd_cmdline;
+          }
+        remove_command_name_from_args(subcmd_full_ident, app.opts.args,
+                                      subcmd_invisible_length);
+      }
+    else
+      {
+        remove_command_name_from_args(cmd_ident, app.opts.args);
+      }
+  }
+
+  // monotone.cc calls this function after option processing.
+  void process(app_state & app, command_id const & ident,
+               args_vector const & args)
+  {
+    static bool process_called(false);
+    I(!process_called);
+    process_called = true;
+
+    command const * cmd = CMD_REF(__root__)->find_command(ident);
+    app.reset_info.cmd = cmd;
+
+    string visibleid = join_words(vector< utf8 >(ident.begin() + 1,
+                                                 ident.end()))();
+
+    I(cmd->is_leaf() || cmd->is_group());
+    E(!(cmd->is_group() && cmd->parent() == CMD_REF(__root__)),
+      origin::user,
+      F("command '%s' is invalid; it is a group") % join_words(ident));
+
+    if (!cmd->is_leaf())
+      {
+        // args used in the command name have not been stripped yet
+        remove_command_name_from_args(ident, app.opts.args);
+
+        E(!args.empty(), origin::user,
+          F("no subcommand specified for '%s'") % visibleid);
+
+        E(false, origin::user,
+          F("could not match '%s' to a subcommand of '%s'") %
+          join_words(args) % visibleid);
+      }
+
+    L(FL("executing command '%s'") % visibleid);
+
+    reapply_options(app, cmd, ident);
+
+    // intentional leak
+    // we don't want the options to be reset, so don't destruct this
+    new options_applicator(app.opts, options_applicator::for_primary_cmd);
+
+    cmd->exec(app, ident, args);
+  }
+
+  // Prints the abstract description of the given command or command group
+  // properly indented.  The tag starts at column two.  The description has
+  // to start, at the very least, two spaces after the tag's end position;
+  // this is given by the colabstract parameter.
+  static void describe(const string & tag, const string & abstract,
+                       const string & subcommands, size_t colabstract,
+                       ostream & out)
+  {
+    I(colabstract > 0);
+
+    size_t col = 0;
+    out << "  " << tag << " ";
+    col += display_width(utf8(tag + "   ", origin::internal));
+
+    out << string(colabstract - col, ' ');
+    col = colabstract;
+    string desc(abstract);
+    if (!subcommands.empty())
+      {
+        desc += " (" + subcommands + ')';
+      }
+    out << format_text(desc, colabstract, col) << '\n';
+  }
+
+  class cmd_ptr_compare
+  {
+  public:
+    bool operator()(command const * const a, command const * const b) const
+    {
+      return a->primary_name()() < b->primary_name()();
+    }
+  };
+
+  static void explain_children(command::children_set const & children,
+                               bool show_hidden_commands,
+                               ostream & out)
+  {
+    I(!children.empty());
+
+    vector< command const * > sorted;
+
+    size_t colabstract = 0;
+    for (command::children_set::const_iterator i = children.begin();
+         i != children.end(); i++)
+      {
+        command const * child = *i;
+
+        if (child->hidden() && !show_hidden_commands)
+          continue;
+
+        size_t len = display_width(join_words(child->names(), ", ")) +
+            display_width(utf8("    "));
+        if (colabstract < len)
+          colabstract = len;
+
+        sorted.push_back(child);
+      }
+
+    sort(sorted.begin(), sorted.end(), cmd_ptr_compare());
+
+    for (vector< command const * >::const_iterator i = sorted.begin();
+         i != sorted.end(); i++)
+      {
+        command const * child = *i;
+        describe(join_words(child->names(), ", ")(), child->abstract(),
+                 join_words(child->subcommands(show_hidden_commands), ", ")(),
+                 colabstract, out);
+      }
+  }
+
+  static command const *
+  find_command(command_id const & ident)
+  {
+    command const * cmd = CMD_REF(__root__)->find_command(ident);
+
+    // This function is only used internally with an identifier returned
+    // by complete_command.  Therefore, it must always exist.
+    I(cmd != NULL);
+
+    return cmd;
+  }
+
+  static void explain_cmd_usage(command_id const & ident,
+                                bool show_hidden_commands,
+                                ostream & out)
+  {
+    I(ident.size() >= 1);
+
+    vector< string > lines;
+    command const * cmd = find_command(ident);
+
+    string visibleid = join_words(vector< utf8 >(ident.begin() + 1,
+                                                 ident.end()))();
+
+    // Print command parameters.
+    string params = cmd->params();
+    split_into_lines(params, lines);
+
+    if (visibleid.empty())
+      out << format_text(F("Commands in group '%s':") %
+                         join_words(ident)())
+          << "\n\n";
+    else
+      {
+        if (!cmd->children().empty())
+          out << format_text(F("Subcommands of '%s %s':") %
+                             prog_name % visibleid)
+              << "\n\n";
+        else if (!lines.empty())
+          out << format_text(F("Syntax specific to '%s %s':") %
+                             prog_name % visibleid)
+              << "\n\n";
+      }
+
+    // lines might be empty, but only when specific syntax is to be
+    // displayed, not in the other cases.
+    if (!lines.empty())
+      {
+        for (vector<string>::const_iterator j = lines.begin();
+             j != lines.end(); ++j)
+          out << "  " << visibleid << ' ' << *j << '\n';
+        out << '\n';
+      }
+
+    // Explain children, if any.
+    if (!cmd->is_leaf())
+      {
+        explain_children(cmd->children(), show_hidden_commands, out);
+        out << '\n';
+      }
+
+    // Print command description.
+    if (visibleid.empty())
+      out << format_text(F("Purpose of group '%s':") %
+                         join_words(ident)())
+          << "\n\n";
+    else
+      out << format_text(F("Description for '%s %s':") %
+                         prog_name % visibleid)
+          << "\n\n";
+    out << format_text(cmd->desc(), 2) << "\n\n";
+
+    // Print all available aliases.
+    if (cmd->names().size() > 1)
+      {
+        command::names_set othernames = cmd->names();
+        othernames.erase(ident[ident.size() - 1]);
+        out << format_text(F("Aliases: %s.") %
+                           join_words(othernames, ", ")(), 2)
+            << '\n';
+      }
+  }
+
+  void explain_usage(command_id const & ident,
+                     bool show_hidden_commands,
+                     ostream & out)
+  {
+    command const * cmd = find_command(ident);
+
+    if (ident.empty())
+      {
+        out << format_text(F("Command groups:")) << "\n\n";
+        explain_children(CMD_REF(__root__)->children(),
+                         show_hidden_commands,
+                         out);
+        out << '\n'
+            << format_text(F("For information on a specific command, type "
+                           "'mtn help <command_name> [subcommand_name ...]'."))
+            << "\n\n"
+            << format_text(F("To see more details about the commands of a "
+                           "particular group, type 'mtn help <group_name>'."))
+            << "\n\n"
+            << format_text(F("Note that you can always abbreviate a command "
+                           "name as long as it does not conflict with other "
+                           "names."))
+            << "\n";
+      }
+    else
+      explain_cmd_usage(ident, show_hidden_commands, out);
+  }
+
+  options::options_type command_options(command_id const & ident)
+  {
+    command const * cmd = find_command(ident);
+    return cmd->opts();
+  }
+
+  // Lua-defined user commands.
+  class cmd_lua : public command
+  {
+    lua_State *st;
+    std::string const f_name;
+  public:
+    cmd_lua(std::string const & primary_name,
+                   std::string const & params,
+                   std::string const & abstract,
+                   std::string const & desc,
+                   lua_State *L_st,
+                   std::string const & func_name) :
+         command(primary_name, "", CMD_REF(user), false, false, params,
+                 abstract, desc, true,
+                 options::options_type() | options::opts::none, true),
+                 st(L_st), f_name(func_name)
+    {
+      // because user commands are inserted after the normal
+      // initialisation process
+      CMD_REF(user)->children().insert(this);
+    }
+
+    void exec(app_state & app, command_id const & execid,
+              args_vector const & args) const
+    {
+      I(st);
+      I(app.lua.check_lua_state(st));
+
+      app_state* app_p = get_app_state(st);
+      I(app_p == & app);
+
+      Lua ll(st);
+      ll.func(f_name);
+
+      for (args_vector::const_iterator it = args.begin();
+           it != args.end(); ++it)
+        ll.push_str((*it)());
+
+      app.mtn_automate_allowed = true;
+
+      ll.call(args.size(),0);
+
+      app.mtn_automate_allowed = false;
+
+      E(ll.ok(), origin::user,
+        F("Call to user command %s (lua command: %s) failed.")
+        % primary_name() % f_name);
+    }
+  };
+}
+
+LUAEXT(alias_command, )
+{
+  const char *old_cmd = luaL_checkstring(LS, -2);
+  const char *new_cmd = luaL_checkstring(LS, -1);
+  E(old_cmd && new_cmd, origin::user,
+    F("%s called with an invalid parameter") % "alias_command");
+
+  args_vector args;
+  args.push_back(arg_type(old_cmd, origin::user));
+  commands::command_id id = commands::complete_command(args);
+  commands::command *old_cmd_p = CMD_REF(__root__)->find_command(id);
+
+  old_cmd_p->add_alias(utf8(new_cmd));
+
+  lua_pushboolean(LS, true);
+  return 1;
+}
+
+
+LUAEXT(register_command, )
+{
+  const char *cmd_name = luaL_checkstring(LS, -5);
+  const char *cmd_params = luaL_checkstring(LS, -4);
+  const char *cmd_abstract = luaL_checkstring(LS, -3);
+  const char *cmd_desc = luaL_checkstring(LS, -2);
+  const char *cmd_func = luaL_checkstring(LS, -1);
+
+  E(cmd_name && cmd_params && cmd_abstract && cmd_desc && cmd_func,
+    origin::user,
+    F("%s called with an invalid parameter") % "register_command");
+
+  // leak this - commands can't be removed anyway
+  new commands::cmd_lua(cmd_name, cmd_params, cmd_abstract, cmd_desc,
+                        LS, cmd_func);
+
+  lua_pushboolean(LS, true);
+  return 1;
+}
+
+// Miscellaneous commands and related functions for which there is no
+// better file.
+
+CMD_NO_WORKSPACE(help, "help", "", CMD_REF(informative),
+                 N_("command [ARGS...]"),
+    N_("Displays help about commands and options"),
+    "",
+    options::opts::show_hidden_commands)
+{
+  if (args.size() < 1)
+    {
+      app.opts.help = true;
+      throw usage(command_id());
+    }
+
+  command_id id = commands::complete_command(args);
+  app.opts.help = true;
+  throw usage(id);
+}
+
+CMD_NO_WORKSPACE(version, "version", "", CMD_REF(informative), "",
+    N_("Shows the program version"),
+    "",
+    options::opts::full)
+{
+  E(args.empty(), origin::user,
+    F("no arguments allowed"));
+
+  if (app.opts.full)
+    print_full_version();
+  else
+    print_version();
+}
+
+CMD_HIDDEN(crash, "crash", "", CMD_REF(debug),
+           "{ N | E | I | double-throw | exception | signal }",
+           N_("Triggers the specified kind of crash"),
+           "",
+           options::opts::none)
+{
+  if (args.size() != 1)
+    throw usage(execid);
+  bool spoon_exists(false);
+  if (idx(args,0)() == "N")
+    E(spoon_exists, origin::user, i18n_format("There is no spoon."));
+  else if (idx(args,0)() == "E")
+    E(spoon_exists, origin::system, i18n_format("There is no spoon."));
+  else if (idx(args,0)() == "I")
+    {
+      I(spoon_exists);
+    }
+  else if (idx(args,0)() == "double-throw")
+    {
+      // This code is rather picky, for example I(false) in the destructor
+      // won't always work like it should; see http://bugs.debian.org/516862
+      class throwing_dtor
+      {
+      public:
+        throwing_dtor() {}
+        ~throwing_dtor()
+        {
+          throw std::exception();
+        }
+      };
+      throwing_dtor td;
+      throw std::exception();
+    }
+#define maybe_throw(ex) if(idx(args,0)()==#ex) throw ex("There is no spoon.")
+#define maybe_throw_bare(ex) if(idx(args,0)()==#ex) throw ex()
+  else maybe_throw_bare(std::bad_alloc);
+  else maybe_throw_bare(std::bad_cast);
+  else maybe_throw_bare(std::bad_typeid);
+  else maybe_throw_bare(std::bad_exception);
+  else maybe_throw_bare(std::exception);
+  else maybe_throw(std::domain_error);
+  else maybe_throw(std::invalid_argument);
+  else maybe_throw(std::length_error);
+  else maybe_throw(std::out_of_range);
+  else maybe_throw(std::range_error);
+  else maybe_throw(std::overflow_error);
+  else maybe_throw(std::underflow_error);
+  else maybe_throw(std::logic_error);
+  else maybe_throw(std::runtime_error);
+  else
+    {
+#ifndef _WIN32
+      try
+        {
+          int signo = boost::lexical_cast<int>(idx(args,0)());
+          if (0 < signo && signo <= 15)
+            {
+              raise(signo);
+              // control should not get here...
+              I(!"crash: raise returned");
+            }
+        }
+      catch (boost::bad_lexical_cast&)
+        { // fall through and throw usage
+        }
+#endif
+      throw usage(execid);
+    }
+#undef maybe_throw
+#undef maybe_throw_bare
+}
+
+static string
+man_italic(string const & content)
+{
+  return "\\fI" + content + "\\fP";
+}
+
+static string
+man_bold(string const & content)
+{
+  return "\\fB" + content + "\\fP";
+}
+
+static string
+man_definition(vector<string> const & labels, string const & content, int width = -1)
+{
+  string out;
+  out += ".IP \"" + (*labels.begin()) + "\"";
+
+  if (width != -1)
+    out += " " + lexical_cast<string>(width);
+  out += "\n";
+
+  if (labels.size() > 1)
+    {
+      out += ".PD 0\n";
+      for (vector<string>::const_iterator i = labels.begin() + 1;
+           i < labels.end(); ++i)
+        {
+          out += ".IP \"" + (*i) + "\"\n";
+        }
+      out += ".PD\n";
+    }
+  out += content;
+  if (content.rfind('\n') != (content.size() - 1))
+     out += "\n";
+  return out;
+}
+
+static string
+man_definition(string const & label, string const & content, int width = -1)
+{
+  vector<string> labels;
+  labels.push_back(label);
+  return man_definition(labels, content, width);
+}
+
+static string
+man_indent(string const & content)
+{
+  return ".RS\n" + content + ".RE\n";
+}
+
+static string
+man_subsection(string const & content)
+{
+  return ".SS \"" + content + "\"\n";
+}
+
+static string
+man_section(string const & content)
+{
+  return ".SH \"" + uppercase(content) + "\"\n";
+}
+
+static string
+man_title(string const & title)
+{
+  return ".TH \"" + title + "\" 1 "+
+         "\"" + date_t::now().as_formatted_localtime("%Y-%m-%d") + "\" " +
+         "\"" + PACKAGE_STRING + "\"\n";
+}
+
+static string
+get_options_string(options::options_type const & optset, options & opts, int width = -1)
+{
+  vector<string> names;
+  vector<string> descriptions;
+  unsigned int maxnamelen;
+
+  optset.instantiate(&opts).get_usage_strings(
+    names, descriptions, maxnamelen, opts.show_hidden_commands
+  );
+
+  string out;
+  vector<string>::const_iterator name;
+  vector<string>::const_iterator desc;
+  for (name = names.begin(), desc = descriptions.begin();
+       name != names.end(); ++name, ++desc)
+    {
+      if (name->empty())
+        continue;
+      out += man_definition(*name, *desc, width);
+    }
+  return out;
+}
+
+static string
+get_commands(options & opts, commands::command const * group)
+{
+  vector<commands::command const *> sorted_commands;
+  commands::command::children_set commands = group->children();
+  for (commands::command::children_set::const_iterator i = commands.begin();
+       i != commands.end(); ++i)
+    {
+      commands::command * command = *i;
+      if (command->hidden() && !opts.show_hidden_commands)
+        continue;
+
+      // there are no top level commands, so this must be an
+      // empty group - skip it
+      if (group->is_leaf())
+        continue;
+
+      sorted_commands.push_back(command);
+    }
+
+  sort(sorted_commands.begin(),
+       sorted_commands.end(),
+       commands::cmd_ptr_compare());
+
+  string out;
+  for (vector<commands::command const * >::const_iterator i = sorted_commands.begin();
+       i != sorted_commands.end(); ++i)
+    {
+      commands::command const * command = *i;
+
+      // don't print sub groups explicitely, just their leaves
+      if (!command->is_leaf())
+        {
+          out += get_commands(opts, command);
+          continue;
+        }
+
+      // this builds a list of already formatted command calls
+      // which are used as label for the specific command section
+      vector<string> cmd_calls;
+
+      //
+      // newline characters in the parameter section mark
+      // alternative call syntaxes which we expand here, i.e.
+      // a command "do-foo" with an alias of "foo" and an argument
+      // list of "BAR\nBAR BAZ" will be expanded to
+      //
+      //  do-foo BAR
+      //  do-foo BAR BAZ
+      //  foo BAR
+      //  foo BAR BAZ
+      //
+      vector<string> params;
+      if (!command->params().empty())
+        split_into_lines(command->params(), params);
+
+      vector<utf8> main_ident = command->ident();
+      typedef set<vector<string> > ident_set;
+      ident_set idents;
+
+      commands::command::names_set allnames = command->names();
+      for (set<utf8>::const_iterator i = allnames.begin();
+           i != allnames.end(); ++i)
+        {
+          vector<string> full_ident;
+          for (vector<utf8>::const_iterator j = main_ident.begin() + 1;
+                j < main_ident.end() - 1;  ++j)
+            {
+              full_ident.push_back((*j)());
+            }
+          full_ident.push_back((*i)());
+          idents.insert(full_ident);
+        }
+
+      for (ident_set::const_iterator i = idents.begin();
+           i != idents.end();  ++i)
+        {
+          string call, name;
+          // cannot use join_words here, since this only
+          // works on containers
+          join_lines(*i, name, " ");
+
+          if (params.size() == 0)
+            {
+              call = man_bold(name);
+              cmd_calls.push_back(call);
+              continue;
+            }
+
+          for (vector<string>::const_iterator j = params.begin();
+               j < params.end(); ++j)
+            {
+              call = man_bold(name) + " " + *j;
+              cmd_calls.push_back(call);
+            }
+        }
+
+      string cmd_desc;
+      cmd_desc += command->desc() + "\n";
+
+      // this prints an indented list of available command options
+      options::options_type cmd_options =
+        commands::command_options(main_ident);
+      if (!cmd_options.empty())
+        {
+          cmd_desc += man_indent(get_options_string(cmd_options, opts, 4));
+        }
+
+      // compile everything into a man definition
+      out += man_definition(cmd_calls, cmd_desc, 4);
+    }
+
+  return out;
+}
+
+static string
+get_command_groups(options & opts)
+{
+  vector<commands::command const *> sorted_groups;
+  commands::command::children_set groups = CMD_REF(__root__)->children();
+  for (commands::command::children_set::const_iterator i = groups.begin();
+       i != groups.end(); ++i)
+    {
+      commands::command * group = *i;
+      if (group->hidden() && !opts.show_hidden_commands)
+        continue;
+
+      // there are no top level commands, so this must be an
+      // empty group - skip it
+      if (group->is_leaf())
+        continue;
+
+      sorted_groups.push_back(group);
+    }
+
+  sort(sorted_groups.begin(),
+       sorted_groups.end(),
+       commands::cmd_ptr_compare());
+
+  string out;
+  for (vector<commands::command const * >::const_iterator i = sorted_groups.begin();
+       i != sorted_groups.end(); ++i)
+    {
+      commands::command const * group = *i;
+      out += man_subsection(
+        (F("command group '%s'") % group->primary_name()).str()
+      );
+      out += group->desc() + "\n";
+
+      out += get_commands(opts, group);
+    }
+
+  return out;
+}
+
+CMD_NO_WORKSPACE(manpage, "manpage", "", CMD_REF(informative), "",
+    N_("Displays monotone's command help as manual page"),
+    "",
+    options::opts::show_hidden_commands)
+{
+  stringstream ss;
+  ss << man_title("monotone");
+  ss << man_section(_("Name"));
+
+  ss << _("monotone - a distributed version control system") << "\n";
+  ss << man_section(_("Synopsis"));
+  ss << man_bold(prog_name) << " "
+     << man_italic(_("[options...] command [arguments...]"))
+     << "\n";
+
+  ss << man_section(_("Description"));
+  ss << _("monotone is a highly reliable, very customizable distributed "
+          "version control system that provides lightweight branches, "
+          "history-sensitive merging and a flexible trust setup. "
+          "monotone has an easy-to-learn command set and comes with a rich "
+          "interface for scripting purposes and thorough documentation.")
+     << "\n\n";
+  ss << (F("For more information on monotone, visit %s.")
+          % man_bold("http://www.monotone.ca")).str()
+     << "\n\n";
+  ss << (F("The complete documentation, including a tutorial for a quick start "
+           "with the system, can be found online on %s.")
+          % man_bold("http://www.monotone.ca/docs")).str() << "\n";
+
+  ss << man_section(_("Global Options"));
+  ss << get_options_string(options::opts::globals(), app.opts, 25) << "\n";
+
+  ss << man_section(_("Commands"));
+  ss << get_command_groups(app.opts);
+
+  ss << man_section(_("See Also"));
+  ss << (F("info %s and the documentation on %s")
+          % prog_name % man_bold("http://monotone.ca/docs")).str() << "\n";
+
+  ss << man_section("Bugs");
+  ss << (F("Please report bugs to %s.")
+          % man_bold("http://savannah.nongnu.org/bugs/?group=monotone")).str()<< "\n";
+
+  ss << man_section("Authors");
+  ss << _("monotone was written originally by Graydon Hoare "
+          "<address@hidden> in 2004 and has since then received "
+          "numerous contributions from many individuals. "
+          "A complete list of authors can be found in AUTHORS.")
+     << "\n\n";
+  ss << _("Nowadays, monotone is maintained by a collective of enthusiastic "
+          "programmers, known as the monotone developement team.") << "\n";
+
+  ss << man_section("Copyright");
+  ss << (F("monotone and this man page is Copyright (c) 2004 - %s by "
+           "the monotone development team.")
+           % date_t::now().as_formatted_localtime("%Y")).str() << "\n";
+
+  if (!isatty(STDOUT_FILENO))
+    {
+      cout << ss.str();
+      return;
+    }
+
+  string cmd;
+  E(app.lua.hook_get_man_page_formatter_command(cmd) && !cmd.empty(),
+    origin::user, F("no man page formatter command configured"));
+
+  FILE * fp = popen(cmd.c_str(), "w");
+  E(fp != NULL, origin::system,
+    F("could not execute man page formatter command '%s': %s")
+      % cmd % strerror(errno));
+
+  I(fprintf(fp, ss.str().c_str()) != -1);
+  pclose(fp);
+}
+
+// There isn't really a better place for this function.
+
+void
+process_commit_message_args(options const & opts,
+                            bool & given,
+                            utf8 & log_message,
+                            utf8 const & message_prefix)
+{
+  // can't have both a --message and a --message-file ...
+  E(!opts.message_given || !opts.msgfile_given, origin::user,
+    F("--message and --message-file are mutually exclusive"));
+
+  if (opts.message_given)
+    {
+      string msg;
+      join_lines(opts.message, msg);
+      log_message = utf8(msg, origin::user);
+      if (!opts.no_prefix && message_prefix().length() != 0)
+        log_message = utf8(message_prefix() + "\n\n" + log_message(),
+                           origin::user);
+      given = true;
+    }
+  else if (opts.msgfile_given)
+    {
+      data dat;
+      read_data_for_command_line(opts.msgfile, dat);
+      external dat2 = typecast_vocab<external>(dat);
+      system_to_utf8(dat2, log_message);
+      if (!opts.no_prefix && message_prefix().length() != 0)
+        log_message = utf8(message_prefix() + "\n\n" + log_message(),
+                           origin::user);
+      given = true;
+    }
+  else if (message_prefix().length() != 0)
+    {
+      log_message = message_prefix;
+      given = true;
+    }
+  else
+    given = false;
+}
+
+// Local Variables:
+// mode: C++
+// fill-column: 76
+// c-file-style: "gnu"
+// indent-tabs-mode: nil
+// End:
+// vim: et:sw=2:sts=2:ts=2:cino=>2s,{s,\:s,+s,t0,g0,^-2,e-2,n-2,p2s,(0,=s: