// -*- C++ -*-
//
// This file was generated by CLI, a command line interface
// compiler for C++.
//

// Begin prologue.
//
#include <build2/types-parsers.hxx>
//
// End prologue.

#include <build2/b-options.hxx>

#include <map>
#include <set>
#include <string>
#include <vector>
#include <ostream>
#include <sstream>
#include <cstring>
#include <fstream>

namespace build2
{
  namespace cl
  {
    // unknown_option
    //
    unknown_option::
    ~unknown_option () throw ()
    {
    }

    void unknown_option::
    print (::std::ostream& os) const
    {
      os << "unknown option '" << option ().c_str () << "'";
    }

    const char* unknown_option::
    what () const throw ()
    {
      return "unknown option";
    }

    // unknown_argument
    //
    unknown_argument::
    ~unknown_argument () throw ()
    {
    }

    void unknown_argument::
    print (::std::ostream& os) const
    {
      os << "unknown argument '" << argument ().c_str () << "'";
    }

    const char* unknown_argument::
    what () const throw ()
    {
      return "unknown argument";
    }

    // missing_value
    //
    missing_value::
    ~missing_value () throw ()
    {
    }

    void missing_value::
    print (::std::ostream& os) const
    {
      os << "missing value for option '" << option ().c_str () << "'";
    }

    const char* missing_value::
    what () const throw ()
    {
      return "missing option value";
    }

    // invalid_value
    //
    invalid_value::
    ~invalid_value () throw ()
    {
    }

    void invalid_value::
    print (::std::ostream& os) const
    {
      os << "invalid value '" << value ().c_str () << "' for option '"
         << option ().c_str () << "'";

      if (!message ().empty ())
        os << ": " << message ().c_str ();
    }

    const char* invalid_value::
    what () const throw ()
    {
      return "invalid option value";
    }

    // eos_reached
    //
    void eos_reached::
    print (::std::ostream& os) const
    {
      os << what ();
    }

    const char* eos_reached::
    what () const throw ()
    {
      return "end of argument stream reached";
    }

    // file_io_failure
    //
    file_io_failure::
    ~file_io_failure () throw ()
    {
    }

    void file_io_failure::
    print (::std::ostream& os) const
    {
      os << "unable to open file '" << file ().c_str () << "' or read failure";
    }

    const char* file_io_failure::
    what () const throw ()
    {
      return "unable to open file or read failure";
    }

    // unmatched_quote
    //
    unmatched_quote::
    ~unmatched_quote () throw ()
    {
    }

    void unmatched_quote::
    print (::std::ostream& os) const
    {
      os << "unmatched quote in argument '" << argument ().c_str () << "'";
    }

    const char* unmatched_quote::
    what () const throw ()
    {
      return "unmatched quote";
    }

    // scanner
    //
    scanner::
    ~scanner ()
    {
    }

    // argv_scanner
    //
    bool argv_scanner::
    more ()
    {
      return i_ < argc_;
    }

    const char* argv_scanner::
    peek ()
    {
      if (i_ < argc_)
        return argv_[i_];
      else
        throw eos_reached ();
    }

    const char* argv_scanner::
    next ()
    {
      if (i_ < argc_)
      {
        const char* r (argv_[i_]);

        if (erase_)
        {
          for (int i (i_ + 1); i < argc_; ++i)
            argv_[i - 1] = argv_[i];

          --argc_;
          argv_[argc_] = 0;
        }
        else
          ++i_;

        return r;
      }
      else
        throw eos_reached ();
    }

    void argv_scanner::
    skip ()
    {
      if (i_ < argc_)
        ++i_;
      else
        throw eos_reached ();
    }

    // argv_file_scanner
    //
    int argv_file_scanner::zero_argc_ = 0;

    bool argv_file_scanner::
    more ()
    {
      if (!args_.empty ())
        return true;

      while (base::more ())
      {
        // See if the next argument is the file option.
        //
        const char* a (base::peek ());
        const option_info* oi = 0;
        const char* ov = 0;

        if (!skip_)
        {
          if ((oi = find (a)) != 0)
          {
            base::next ();

            if (!base::more ())
              throw missing_value (a);

            ov = base::next ();
          }
          else if (std::strncmp (a, "-", 1) == 0)
          {
            if ((ov = std::strchr (a, '=')) != 0)
            {
              std::string o (a, 0, ov - a);
              if ((oi = find (o.c_str ())) != 0)
              {
                base::next ();
                ++ov;
              }
            }
          }
        }

        if (oi != 0)
        {
          if (oi->search_func != 0)
          {
            std::string f (oi->search_func (ov, oi->arg));

            if (!f.empty ())
              load (f);
          }
          else
            load (ov);

          if (!args_.empty ())
            return true;
        }
        else
        {
          if (!skip_)
            skip_ = (std::strcmp (a, "--") == 0);

          return true;
        }
      }

      return false;
    }

    const char* argv_file_scanner::
    peek ()
    {
      if (!more ())
        throw eos_reached ();

      return args_.empty () ? base::peek () : args_.front ().c_str ();
    }

    const char* argv_file_scanner::
    next ()
    {
      if (!more ())
        throw eos_reached ();

      if (args_.empty ())
        return base::next ();
      else
      {
        hold_[i_ == 0 ? ++i_ : --i_].swap (args_.front ());
        args_.pop_front ();
        return hold_[i_].c_str ();
      }
    }

    void argv_file_scanner::
    skip ()
    {
      if (!more ())
        throw eos_reached ();

      if (args_.empty ())
        return base::skip ();
      else
        args_.pop_front ();
    }

    const argv_file_scanner::option_info* argv_file_scanner::
    find (const char* a) const
    {
      for (std::size_t i (0); i < options_count_; ++i)
        if (std::strcmp (a, options_[i].option) == 0)
          return &options_[i];

      return 0;
    }

    void argv_file_scanner::
    load (const std::string& file)
    {
      using namespace std;

      ifstream is (file.c_str ());

      if (!is.is_open ())
        throw file_io_failure (file);

      while (!is.eof ())
      {
        string line;
        getline (is, line);

        if (is.fail () && !is.eof ())
          throw file_io_failure (file);

        string::size_type n (line.size ());

        // Trim the line from leading and trailing whitespaces.
        //
        if (n != 0)
        {
          const char* f (line.c_str ());
          const char* l (f + n);

          const char* of (f);
          while (f < l && (*f == ' ' || *f == '\t' || *f == '\r'))
            ++f;

          --l;

          const char* ol (l);
          while (l > f && (*l == ' ' || *l == '\t' || *l == '\r'))
            --l;

          if (f != of || l != ol)
            line = f <= l ? string (f, l - f + 1) : string ();
        }

        // Ignore empty lines, those that start with #.
        //
        if (line.empty () || line[0] == '#')
          continue;

        string::size_type p (string::npos);
        if (line.compare (0, 1, "-") == 0)
        {
          p = line.find (' ');

          string::size_type q (line.find ('='));
          if (q != string::npos && q < p)
            p = q;
        }

        string s1;
        if (p != string::npos)
        {
          s1.assign (line, 0, p);

          // Skip leading whitespaces in the argument.
          //
          if (line[p] == '=')
            ++p;
          else
          {
            n = line.size ();
            for (++p; p < n; ++p)
            {
              char c (line[p]);
              if (c != ' ' && c != '\t' && c != '\r')
                break;
            }
          }
        }
        else if (!skip_)
          skip_ = (line == "--");

        string s2 (line, p != string::npos ? p : 0);

        // If the string (which is an option value or argument) is
        // wrapped in quotes, remove them.
        //
        n = s2.size ();
        char cf (s2[0]), cl (s2[n - 1]);

        if (cf == '"' || cf == '\'' || cl == '"' || cl == '\'')
        {
          if (n == 1 || cf != cl)
            throw unmatched_quote (s2);

          s2 = string (s2, 1, n - 2);
        }

        if (!s1.empty ())
        {
          // See if this is another file option.
          //
          const option_info* oi;
          if (!skip_ && (oi = find (s1.c_str ())))
          {
            if (s2.empty ())
              throw missing_value (oi->option);

            if (oi->search_func != 0)
            {
              std::string f (oi->search_func (s2.c_str (), oi->arg));
              if (!f.empty ())
                load (f);
            }
            else
              load (s2);

            continue;
          }

          args_.push_back (s1);
        }

        args_.push_back (s2);
      }
    }

    template <typename X>
    struct parser
    {
      static void
      parse (X& x, bool& xs, scanner& s)
      {
        using namespace std;

        const char* o (s.next ());
        if (s.more ())
        {
          string v (s.next ());
          istringstream is (v);
          if (!(is >> x && is.peek () == istringstream::traits_type::eof ()))
            throw invalid_value (o, v);
        }
        else
          throw missing_value (o);

        xs = true;
      }

      static void
      merge (X& b, const X& a)
      {
        b = a;
      }
    };

    template <>
    struct parser<bool>
    {
      static void
      parse (bool& x, scanner& s)
      {
        s.next ();
        x = true;
      }

      static void
      merge (bool& b, const bool&)
      {
        b = true;
      }
    };

    template <>
    struct parser<std::string>
    {
      static void
      parse (std::string& x, bool& xs, scanner& s)
      {
        const char* o (s.next ());

        if (s.more ())
          x = s.next ();
        else
          throw missing_value (o);

        xs = true;
      }

      static void
      merge (std::string& b, const std::string& a)
      {
        b = a;
      }
    };

    template <typename X>
    struct parser<std::vector<X> >
    {
      static void
      parse (std::vector<X>& c, bool& xs, scanner& s)
      {
        X x;
        bool dummy;
        parser<X>::parse (x, dummy, s);
        c.push_back (x);
        xs = true;
      }

      static void
      merge (std::vector<X>& b, const std::vector<X>& a)
      {
        b.insert (b.end (), a.begin (), a.end ());
      }
    };

    template <typename X>
    struct parser<std::set<X> >
    {
      static void
      parse (std::set<X>& c, bool& xs, scanner& s)
      {
        X x;
        bool dummy;
        parser<X>::parse (x, dummy, s);
        c.insert (x);
        xs = true;
      }

      static void
      merge (std::set<X>& b, const std::set<X>& a)
      {
        b.insert (a.begin (), a.end ());
      }
    };

    template <typename K, typename V>
    struct parser<std::map<K, V> >
    {
      static void
      parse (std::map<K, V>& m, bool& xs, scanner& s)
      {
        const char* o (s.next ());

        if (s.more ())
        {
          std::string ov (s.next ());
          std::string::size_type p = ov.find ('=');

          K k = K ();
          V v = V ();
          std::string kstr (ov, 0, p);
          std::string vstr (ov, (p != std::string::npos ? p + 1 : ov.size ()));

          int ac (2);
          char* av[] = 
          {
            const_cast<char*> (o), 0
          };

          bool dummy;
          if (!kstr.empty ())
          {
            av[1] = const_cast<char*> (kstr.c_str ());
            argv_scanner s (0, ac, av);
            parser<K>::parse (k, dummy, s);
          }

          if (!vstr.empty ())
          {
            av[1] = const_cast<char*> (vstr.c_str ());
            argv_scanner s (0, ac, av);
            parser<V>::parse (v, dummy, s);
          }

          m[k] = v;
        }
        else
          throw missing_value (o);

        xs = true;
      }

      static void
      merge (std::map<K, V>& b, const std::map<K, V>& a)
      {
        for (typename std::map<K, V>::const_iterator i (a.begin ()); 
             i != a.end (); 
             ++i)
          b[i->first] = i->second;
      }
    };

    template <typename X, typename T, T X::*M>
    void
    thunk (X& x, scanner& s)
    {
      parser<T>::parse (x.*M, s);
    }

    template <typename X, typename T, T X::*M, bool X::*S>
    void
    thunk (X& x, scanner& s)
    {
      parser<T>::parse (x.*M, x.*S, s);
    }
  }
}

#include <map>
#include <cstring>

namespace build2
{
  // options
  //

  options::
  options ()
  : v_ (),
    V_ (),
    quiet_ (),
    verbose_ (1),
    verbose_specified_ (false),
    stat_ (),
    dump_ (),
    dump_specified_ (false),
    progress_ (),
    no_progress_ (),
    jobs_ (),
    jobs_specified_ (false),
    max_jobs_ (),
    max_jobs_specified_ (false),
    queue_depth_ (4),
    queue_depth_specified_ (false),
    max_stack_ (),
    max_stack_specified_ (false),
    serial_stop_ (),
    dry_run_ (),
    match_only_ (),
    structured_result_ (),
    mtime_check_ (),
    no_mtime_check_ (),
    no_column_ (),
    no_line_ (),
    buildfile_ (),
    buildfile_specified_ (false),
    config_guess_ (),
    config_guess_specified_ (false),
    config_sub_ (),
    config_sub_specified_ (false),
    pager_ (),
    pager_specified_ (false),
    pager_option_ (),
    pager_option_specified_ (false),
    default_options_ (),
    default_options_specified_ (false),
    no_default_options_ (),
    help_ (),
    version_ ()
  {
  }

  bool options::
  parse (int& argc,
         char** argv,
         bool erase,
         ::build2::cl::unknown_mode opt,
         ::build2::cl::unknown_mode arg)
  {
    ::build2::cl::argv_scanner s (argc, argv, erase);
    bool r = _parse (s, opt, arg);
    return r;
  }

  bool options::
  parse (int start,
         int& argc,
         char** argv,
         bool erase,
         ::build2::cl::unknown_mode opt,
         ::build2::cl::unknown_mode arg)
  {
    ::build2::cl::argv_scanner s (start, argc, argv, erase);
    bool r = _parse (s, opt, arg);
    return r;
  }

  bool options::
  parse (int& argc,
         char** argv,
         int& end,
         bool erase,
         ::build2::cl::unknown_mode opt,
         ::build2::cl::unknown_mode arg)
  {
    ::build2::cl::argv_scanner s (argc, argv, erase);
    bool r = _parse (s, opt, arg);
    end = s.end ();
    return r;
  }

  bool options::
  parse (int start,
         int& argc,
         char** argv,
         int& end,
         bool erase,
         ::build2::cl::unknown_mode opt,
         ::build2::cl::unknown_mode arg)
  {
    ::build2::cl::argv_scanner s (start, argc, argv, erase);
    bool r = _parse (s, opt, arg);
    end = s.end ();
    return r;
  }

  bool options::
  parse (::build2::cl::scanner& s,
         ::build2::cl::unknown_mode opt,
         ::build2::cl::unknown_mode arg)
  {
    bool r = _parse (s, opt, arg);
    return r;
  }

  void options::
  merge (const options& a)
  {
    CLI_POTENTIALLY_UNUSED (a);

    if (a.v_)
    {
      ::build2::cl::parser< bool>::merge (
        this->v_, a.v_);
    }

    if (a.V_)
    {
      ::build2::cl::parser< bool>::merge (
        this->V_, a.V_);
    }

    if (a.quiet_)
    {
      ::build2::cl::parser< bool>::merge (
        this->quiet_, a.quiet_);
    }

    if (a.verbose_specified_)
    {
      ::build2::cl::parser< uint16_t>::merge (
        this->verbose_, a.verbose_);
      this->verbose_specified_ = true;
    }

    if (a.stat_)
    {
      ::build2::cl::parser< bool>::merge (
        this->stat_, a.stat_);
    }

    if (a.dump_specified_)
    {
      ::build2::cl::parser< std::set<string>>::merge (
        this->dump_, a.dump_);
      this->dump_specified_ = true;
    }

    if (a.progress_)
    {
      ::build2::cl::parser< bool>::merge (
        this->progress_, a.progress_);
    }

    if (a.no_progress_)
    {
      ::build2::cl::parser< bool>::merge (
        this->no_progress_, a.no_progress_);
    }

    if (a.jobs_specified_)
    {
      ::build2::cl::parser< size_t>::merge (
        this->jobs_, a.jobs_);
      this->jobs_specified_ = true;
    }

    if (a.max_jobs_specified_)
    {
      ::build2::cl::parser< size_t>::merge (
        this->max_jobs_, a.max_jobs_);
      this->max_jobs_specified_ = true;
    }

    if (a.queue_depth_specified_)
    {
      ::build2::cl::parser< size_t>::merge (
        this->queue_depth_, a.queue_depth_);
      this->queue_depth_specified_ = true;
    }

    if (a.max_stack_specified_)
    {
      ::build2::cl::parser< size_t>::merge (
        this->max_stack_, a.max_stack_);
      this->max_stack_specified_ = true;
    }

    if (a.serial_stop_)
    {
      ::build2::cl::parser< bool>::merge (
        this->serial_stop_, a.serial_stop_);
    }

    if (a.dry_run_)
    {
      ::build2::cl::parser< bool>::merge (
        this->dry_run_, a.dry_run_);
    }

    if (a.match_only_)
    {
      ::build2::cl::parser< bool>::merge (
        this->match_only_, a.match_only_);
    }

    if (a.structured_result_)
    {
      ::build2::cl::parser< bool>::merge (
        this->structured_result_, a.structured_result_);
    }

    if (a.mtime_check_)
    {
      ::build2::cl::parser< bool>::merge (
        this->mtime_check_, a.mtime_check_);
    }

    if (a.no_mtime_check_)
    {
      ::build2::cl::parser< bool>::merge (
        this->no_mtime_check_, a.no_mtime_check_);
    }

    if (a.no_column_)
    {
      ::build2::cl::parser< bool>::merge (
        this->no_column_, a.no_column_);
    }

    if (a.no_line_)
    {
      ::build2::cl::parser< bool>::merge (
        this->no_line_, a.no_line_);
    }

    if (a.buildfile_specified_)
    {
      ::build2::cl::parser< path>::merge (
        this->buildfile_, a.buildfile_);
      this->buildfile_specified_ = true;
    }

    if (a.config_guess_specified_)
    {
      ::build2::cl::parser< path>::merge (
        this->config_guess_, a.config_guess_);
      this->config_guess_specified_ = true;
    }

    if (a.config_sub_specified_)
    {
      ::build2::cl::parser< path>::merge (
        this->config_sub_, a.config_sub_);
      this->config_sub_specified_ = true;
    }

    if (a.pager_specified_)
    {
      ::build2::cl::parser< string>::merge (
        this->pager_, a.pager_);
      this->pager_specified_ = true;
    }

    if (a.pager_option_specified_)
    {
      ::build2::cl::parser< strings>::merge (
        this->pager_option_, a.pager_option_);
      this->pager_option_specified_ = true;
    }

    if (a.default_options_specified_)
    {
      ::build2::cl::parser< dir_path>::merge (
        this->default_options_, a.default_options_);
      this->default_options_specified_ = true;
    }

    if (a.no_default_options_)
    {
      ::build2::cl::parser< bool>::merge (
        this->no_default_options_, a.no_default_options_);
    }

    if (a.help_)
    {
      ::build2::cl::parser< bool>::merge (
        this->help_, a.help_);
    }

    if (a.version_)
    {
      ::build2::cl::parser< bool>::merge (
        this->version_, a.version_);
    }
  }

  ::build2::cl::usage_para options::
  print_usage (::std::ostream& os, ::build2::cl::usage_para p)
  {
    CLI_POTENTIALLY_UNUSED (os);

    if (p != ::build2::cl::usage_para::none)
      os << ::std::endl;

    os << "\033[1mOPTIONS\033[0m" << ::std::endl;

    os << std::endl
       << "\033[1m-v\033[0m                    Print actual commands being executed. This is equivalent" << ::std::endl
       << "                      to \033[1m--verbose 2\033[0m." << ::std::endl;

    os << std::endl
       << "\033[1m-V\033[0m                    Print all underlying commands being executed. This is" << ::std::endl
       << "                      equivalent to \033[1m--verbose 3\033[0m." << ::std::endl;

    os << std::endl
       << "\033[1m--quiet\033[0m|\033[1m-q\033[0m            Run quietly, only printing error messages. This is" << ::std::endl
       << "                      equivalent to \033[1m--verbose 0\033[0m." << ::std::endl;

    os << std::endl
       << "\033[1m--verbose\033[0m \033[4mlevel\033[0m       Set the diagnostics verbosity to \033[4mlevel\033[0m between 0 and 6." << ::std::endl
       << "                      Level 0 disables any non-error messages while level 6" << ::std::endl
       << "                      produces lots of information, with level 1 being the" << ::std::endl
       << "                      default. The following additional types of diagnostics" << ::std::endl
       << "                      are produced at each level:" << ::std::endl
       << ::std::endl
       << "                      1. High-level information messages." << ::std::endl
       << "                      2. Essential underlying commands being executed." << ::std::endl
       << "                      3. All underlying commands being executed." << ::std::endl
       << "                      4. Information that could be helpful to the user." << ::std::endl
       << "                      5. Information that could be helpful to the developer." << ::std::endl
       << "                      6. Even more detailed information." << ::std::endl;

    os << std::endl
       << "\033[1m--stat\033[0m                Display build statistics." << ::std::endl;

    os << std::endl
       << "\033[1m--dump\033[0m \033[4mphase\033[0m          Dump the build system state after the specified phase." << ::std::endl
       << "                      Valid \033[4mphase\033[0m values are \033[1mload\033[0m (after loading \033[1mbuildfiles\033[0m)" << ::std::endl
       << "                      and \033[1mmatch\033[0m (after matching rules to targets). Repeat this" << ::std::endl
       << "                      option to dump the state after multiple phases." << ::std::endl;

    os << std::endl
       << "\033[1m--progress\033[0m            Display build progress. If printing to a terminal the" << ::std::endl
       << "                      progress is displayed by default for low verbosity" << ::std::endl
       << "                      levels. Use \033[1m--no-progress\033[0m to suppress." << ::std::endl;

    os << std::endl
       << "\033[1m--no-progress\033[0m         Don't display build progress." << ::std::endl;

    os << std::endl
       << "\033[1m--jobs\033[0m|\033[1m-j\033[0m \033[4mnum\033[0m         Number of active jobs to perform in parallel. This" << ::std::endl
       << "                      includes both the number of active threads inside the" << ::std::endl
       << "                      build system as well as the number of external commands" << ::std::endl
       << "                      (compilers, linkers, etc) started but not yet finished." << ::std::endl
       << "                      If this option is not specified or specified with the \033[1m0\033[0m" << ::std::endl
       << "                      value, then the number of available hardware threads is" << ::std::endl
       << "                      used." << ::std::endl;

    os << std::endl
       << "\033[1m--max-jobs\033[0m|\033[1m-J\033[0m \033[4mnum\033[0m     Maximum number of jobs (threads) to create. The default" << ::std::endl
       << "                      is 8x the number of active jobs (\033[1m--jobs|j\033[0m) on 32-bit" << ::std::endl
       << "                      architectures and 32x on 64-bit. See the build system" << ::std::endl
       << "                      scheduler implementation for details." << ::std::endl;

    os << std::endl
       << "\033[1m--queue-depth\033[0m|\033[1m-Q\033[0m \033[4mnum\033[0m  The queue depth as a multiplier over the number of active" << ::std::endl
       << "                      jobs. Normally we want a deeper queue if the jobs take" << ::std::endl
       << "                      long (for example, compilation) and shorter if they are" << ::std::endl
       << "                      quick (for example, simple tests). The default is 4. See" << ::std::endl
       << "                      the build system scheduler implementation for details." << ::std::endl;

    os << std::endl
       << "\033[1m--max-stack\033[0m \033[4mnum\033[0m       The maximum stack size in KBytes to allow for newly" << ::std::endl
       << "                      created threads. For \033[4mpthreads\033[0m-based systems the driver" << ::std::endl
       << "                      queries the stack size of the main thread and uses the" << ::std::endl
       << "                      same size for creating additional threads. This allows" << ::std::endl
       << "                      adjusting the stack size using familiar mechanisms, such" << ::std::endl
       << "                      as \033[1mulimit\033[0m. Sometimes, however, the stack size of the main" << ::std::endl
       << "                      thread is excessively large. As a result, the driver" << ::std::endl
       << "                      checks if it is greater than a predefined limit (64MB on" << ::std::endl
       << "                      64-bit systems and 32MB on 32-bit ones) and caps it to a" << ::std::endl
       << "                      more sensible value (8MB) if that's the case. This option" << ::std::endl
       << "                      allows you to override this check with the special zero" << ::std::endl
       << "                      value indicating that the main thread stack size should" << ::std::endl
       << "                      be used as is." << ::std::endl;

    os << std::endl
       << "\033[1m--serial-stop\033[0m|\033[1m-s\033[0m      Run serially and stop at the first error. This mode is" << ::std::endl
       << "                      useful to investigate build failures that are caused by" << ::std::endl
       << "                      build system errors rather than compilation errors. Note" << ::std::endl
       << "                      that if you don't want to keep going but still want" << ::std::endl
       << "                      parallel execution, add \033[1m--jobs|-j\033[0m (for example \033[1m-j 0\033[0m for" << ::std::endl
       << "                      default concurrency)." << ::std::endl;

    os << std::endl
       << "\033[1m--dry-run\033[0m|\033[1m-n\033[0m          Print commands without actually executing them. Note that" << ::std::endl
       << "                      commands that are required to create an accurate build" << ::std::endl
       << "                      state will still be executed and the extracted auxiliary" << ::std::endl
       << "                      dependency information saved. In other words, this is not" << ::std::endl
       << "                      the \033[4m\"don't touch the filesystem\"\033[0m mode but rather \033[4m\"do" << ::std::endl
       << "                      minimum amount of work to show what needs to be done\"\033[0m." << ::std::endl
       << "                      Note also that only the \033[1mperform\033[0m meta-operation supports" << ::std::endl
       << "                      this mode." << ::std::endl;

    os << std::endl
       << "\033[1m--match-only\033[0m          Match the rules but do not execute the operation. This" << ::std::endl
       << "                      mode is primarily useful for profiling." << ::std::endl;

    os << std::endl
       << "\033[1m--structured-result\033[0m   Write the result of execution in a structured form. In" << ::std::endl
       << "                      this mode, instead of printing to \033[1mSTDERR\033[0m diagnostics" << ::std::endl
       << "                      messages about the outcome of executing actions on" << ::std::endl
       << "                      targets, the driver writes to \033[1mSTDOUT\033[0m a structured result" << ::std::endl
       << "                      description one line per the buildspec action/target" << ::std::endl
       << "                      pair. Each line has the following format:" << ::std::endl
       << ::std::endl
       << "                      \033[4mstate\033[0m \033[4mmeta-operation\033[0m \033[4moperation\033[0m \033[4mtarget\033[0m\033[0m" << ::std::endl
       << ::std::endl
       << "                      Where \033[4mstate\033[0m can be one of \033[1munchanged\033[0m, \033[1mchanged\033[0m, or \033[1mfailed\033[0m." << ::std::endl
       << "                      If the action is a pre or post operation, then the outer" << ::std::endl
       << "                      operation is specified in parenthesis. For example:" << ::std::endl
       << ::std::endl
       << "                      unchanged perform update(test) /tmp/dir{hello/}" << ::std::endl
       << "                      changed perform test /tmp/dir{hello/}" << ::std::endl
       << ::std::endl
       << "                      Note that only the \033[1mperform\033[0m meta-operation supports the" << ::std::endl
       << "                      structured result output." << ::std::endl;

    os << std::endl
       << "\033[1m--mtime-check\033[0m         Perform file modification time sanity checks. These" << ::std::endl
       << "                      checks can be helpful in diagnosing spurious rebuilds and" << ::std::endl
       << "                      are enabled by default for the staged version of the" << ::std::endl
       << "                      build system. Use \033[1m--no-mtime-check\033[0m to disable." << ::std::endl;

    os << std::endl
       << "\033[1m--no-mtime-check\033[0m      Don't perform file modification time sanity checks." << ::std::endl;

    os << std::endl
       << "\033[1m--no-column\033[0m           Don't print column numbers in diagnostics." << ::std::endl;

    os << std::endl
       << "\033[1m--no-line\033[0m             Don't print line and column numbers in diagnostics." << ::std::endl;

    os << std::endl
       << "\033[1m--buildfile\033[0m \033[4mpath\033[0m      The alternative file to read build information from. The" << ::std::endl
       << "                      default is \033[1mbuildfile\033[0m or \033[1mbuild2file\033[0m, depending on the" << ::std::endl
       << "                      project's build file/directory naming scheme. If \033[4mpath\033[0m is" << ::std::endl
       << "                      '\033[1m-\033[0m', then read from \033[1mSTDIN\033[0m. Note that this option only" << ::std::endl
       << "                      affects the files read as part of the buildspec" << ::std::endl
       << "                      processing. Specifically, it has no effect on the \033[1msource\033[0m" << ::std::endl
       << "                      and \033[1minclude\033[0m directives. As a result, this option is" << ::std::endl
       << "                      primarily intended for testing rather than changing the" << ::std::endl
       << "                      build file names in real projects." << ::std::endl;

    os << std::endl
       << "\033[1m--config-guess\033[0m \033[4mpath\033[0m   The path to the \033[1mconfig.guess(1)\033[0m script that should be" << ::std::endl
       << "                      used to guess the host machine triplet. If this option is" << ::std::endl
       << "                      not specified, then \033[1mb\033[0m will fall back on to using the" << ::std::endl
       << "                      target it was built for as host." << ::std::endl;

    os << std::endl
       << "\033[1m--config-sub\033[0m \033[4mpath\033[0m     The path to the \033[1mconfig.sub(1)\033[0m script that should be used" << ::std::endl
       << "                      to canonicalize machine triplets. If this option is not" << ::std::endl
       << "                      specified, then \033[1mb\033[0m will use its built-in canonicalization" << ::std::endl
       << "                      support which should be sufficient for commonly-used" << ::std::endl
       << "                      platforms." << ::std::endl;

    os << std::endl
       << "\033[1m--pager\033[0m \033[4mpath\033[0m          The pager program to be used to show long text. Commonly" << ::std::endl
       << "                      used pager programs are \033[1mless\033[0m and \033[1mmore\033[0m. You can also" << ::std::endl
       << "                      specify additional options that should be passed to the" << ::std::endl
       << "                      pager program with \033[1m--pager-option\033[0m. If an empty string is" << ::std::endl
       << "                      specified as the pager program, then no pager will be" << ::std::endl
       << "                      used. If the pager program is not explicitly specified," << ::std::endl
       << "                      then \033[1mb\033[0m will try to use \033[1mless\033[0m. If it is not available, then" << ::std::endl
       << "                      no pager will be used." << ::std::endl;

    os << std::endl
       << "\033[1m--pager-option\033[0m \033[4mopt\033[0m    Additional option to be passed to the pager program. See" << ::std::endl
       << "                      \033[1m--pager\033[0m for more information on the pager program. Repeat" << ::std::endl
       << "                      this option to specify multiple pager options." << ::std::endl;

    os << std::endl
       << "\033[1m--default-options\033[0m \033[4mdir\033[0m The directory to load additional default options files" << ::std::endl
       << "                      from." << ::std::endl;

    os << std::endl
       << "\033[1m--no-default-options\033[0m  Don't load default options files." << ::std::endl;

    os << std::endl
       << "\033[1m--help\033[0m                Print usage information and exit." << ::std::endl;

    os << std::endl
       << "\033[1m--version\033[0m             Print version and exit." << ::std::endl;

    p = ::build2::cl::usage_para::option;

    return p;
  }

  typedef
  std::map<std::string, void (*) (options&, ::build2::cl::scanner&)>
  _cli_options_map;

  static _cli_options_map _cli_options_map_;

  struct _cli_options_map_init
  {
    _cli_options_map_init ()
    {
      _cli_options_map_["-v"] = 
      &::build2::cl::thunk< options, bool, &options::v_ >;
      _cli_options_map_["-V"] = 
      &::build2::cl::thunk< options, bool, &options::V_ >;
      _cli_options_map_["--quiet"] = 
      &::build2::cl::thunk< options, bool, &options::quiet_ >;
      _cli_options_map_["-q"] = 
      &::build2::cl::thunk< options, bool, &options::quiet_ >;
      _cli_options_map_["--verbose"] = 
      &::build2::cl::thunk< options, uint16_t, &options::verbose_,
        &options::verbose_specified_ >;
      _cli_options_map_["--stat"] = 
      &::build2::cl::thunk< options, bool, &options::stat_ >;
      _cli_options_map_["--dump"] = 
      &::build2::cl::thunk< options, std::set<string>, &options::dump_,
        &options::dump_specified_ >;
      _cli_options_map_["--progress"] = 
      &::build2::cl::thunk< options, bool, &options::progress_ >;
      _cli_options_map_["--no-progress"] = 
      &::build2::cl::thunk< options, bool, &options::no_progress_ >;
      _cli_options_map_["--jobs"] = 
      &::build2::cl::thunk< options, size_t, &options::jobs_,
        &options::jobs_specified_ >;
      _cli_options_map_["-j"] = 
      &::build2::cl::thunk< options, size_t, &options::jobs_,
        &options::jobs_specified_ >;
      _cli_options_map_["--max-jobs"] = 
      &::build2::cl::thunk< options, size_t, &options::max_jobs_,
        &options::max_jobs_specified_ >;
      _cli_options_map_["-J"] = 
      &::build2::cl::thunk< options, size_t, &options::max_jobs_,
        &options::max_jobs_specified_ >;
      _cli_options_map_["--queue-depth"] = 
      &::build2::cl::thunk< options, size_t, &options::queue_depth_,
        &options::queue_depth_specified_ >;
      _cli_options_map_["-Q"] = 
      &::build2::cl::thunk< options, size_t, &options::queue_depth_,
        &options::queue_depth_specified_ >;
      _cli_options_map_["--max-stack"] = 
      &::build2::cl::thunk< options, size_t, &options::max_stack_,
        &options::max_stack_specified_ >;
      _cli_options_map_["--serial-stop"] = 
      &::build2::cl::thunk< options, bool, &options::serial_stop_ >;
      _cli_options_map_["-s"] = 
      &::build2::cl::thunk< options, bool, &options::serial_stop_ >;
      _cli_options_map_["--dry-run"] = 
      &::build2::cl::thunk< options, bool, &options::dry_run_ >;
      _cli_options_map_["-n"] = 
      &::build2::cl::thunk< options, bool, &options::dry_run_ >;
      _cli_options_map_["--match-only"] = 
      &::build2::cl::thunk< options, bool, &options::match_only_ >;
      _cli_options_map_["--structured-result"] = 
      &::build2::cl::thunk< options, bool, &options::structured_result_ >;
      _cli_options_map_["--mtime-check"] = 
      &::build2::cl::thunk< options, bool, &options::mtime_check_ >;
      _cli_options_map_["--no-mtime-check"] = 
      &::build2::cl::thunk< options, bool, &options::no_mtime_check_ >;
      _cli_options_map_["--no-column"] = 
      &::build2::cl::thunk< options, bool, &options::no_column_ >;
      _cli_options_map_["--no-line"] = 
      &::build2::cl::thunk< options, bool, &options::no_line_ >;
      _cli_options_map_["--buildfile"] = 
      &::build2::cl::thunk< options, path, &options::buildfile_,
        &options::buildfile_specified_ >;
      _cli_options_map_["--config-guess"] = 
      &::build2::cl::thunk< options, path, &options::config_guess_,
        &options::config_guess_specified_ >;
      _cli_options_map_["--config-sub"] = 
      &::build2::cl::thunk< options, path, &options::config_sub_,
        &options::config_sub_specified_ >;
      _cli_options_map_["--pager"] = 
      &::build2::cl::thunk< options, string, &options::pager_,
        &options::pager_specified_ >;
      _cli_options_map_["--pager-option"] = 
      &::build2::cl::thunk< options, strings, &options::pager_option_,
        &options::pager_option_specified_ >;
      _cli_options_map_["--default-options"] = 
      &::build2::cl::thunk< options, dir_path, &options::default_options_,
        &options::default_options_specified_ >;
      _cli_options_map_["--no-default-options"] = 
      &::build2::cl::thunk< options, bool, &options::no_default_options_ >;
      _cli_options_map_["--help"] = 
      &::build2::cl::thunk< options, bool, &options::help_ >;
      _cli_options_map_["--version"] = 
      &::build2::cl::thunk< options, bool, &options::version_ >;
    }
  };

  static _cli_options_map_init _cli_options_map_init_;

  bool options::
  _parse (const char* o, ::build2::cl::scanner& s)
  {
    _cli_options_map::const_iterator i (_cli_options_map_.find (o));

    if (i != _cli_options_map_.end ())
    {
      (*(i->second)) (*this, s);
      return true;
    }

    return false;
  }

  bool options::
  _parse (::build2::cl::scanner& s,
          ::build2::cl::unknown_mode opt_mode,
          ::build2::cl::unknown_mode arg_mode)
  {
    // Can't skip combined flags (--no-combined-flags).
    //
    assert (opt_mode != ::build2::cl::unknown_mode::skip);

    bool r = false;
    bool opt = true;

    while (s.more ())
    {
      const char* o = s.peek ();

      if (std::strcmp (o, "--") == 0)
      {
        opt = false;
      }

      if (opt)
      {
        if (_parse (o, s))
        {
          r = true;
          continue;
        }

        if (std::strncmp (o, "-", 1) == 0 && o[1] != '\0')
        {
          // Handle combined option values.
          //
          std::string co;
          if (const char* v = std::strchr (o, '='))
          {
            co.assign (o, 0, v - o);
            ++v;

            int ac (2);
            char* av[] =
            {
              const_cast<char*> (co.c_str ()),
              const_cast<char*> (v)
            };

            ::build2::cl::argv_scanner ns (0, ac, av);

            if (_parse (co.c_str (), ns))
            {
              // Parsed the option but not its value?
              //
              if (ns.end () != 2)
                throw ::build2::cl::invalid_value (co, v);

              s.next ();
              r = true;
              continue;
            }
            else
            {
              // Set the unknown option and fall through.
              //
              o = co.c_str ();
            }
          }

          // Handle combined flags.
          //
          char cf[3];
          {
            const char* p = o + 1;
            for (; *p != '\0'; ++p)
            {
              if (!((*p >= 'a' && *p <= 'z') ||
                    (*p >= 'A' && *p <= 'Z') ||
                    (*p >= '0' && *p <= '9')))
                break;
            }

            if (*p == '\0')
            {
              for (p = o + 1; *p != '\0'; ++p)
              {
                std::strcpy (cf, "-");
                cf[1] = *p;
                cf[2] = '\0';

                int ac (1);
                char* av[] = 
                {
                  cf
                };

                ::build2::cl::argv_scanner ns (0, ac, av);

                if (!_parse (cf, ns))
                  break;
              }

              if (*p == '\0')
              {
                // All handled.
                //
                s.next ();
                r = true;
                continue;
              }
              else
              {
                // Set the unknown option and fall through.
                //
                o = cf;
              }
            }
          }

          switch (opt_mode)
          {
            case ::build2::cl::unknown_mode::skip:
            {
              s.skip ();
              r = true;
              continue;
            }
            case ::build2::cl::unknown_mode::stop:
            {
              break;
            }
            case ::build2::cl::unknown_mode::fail:
            {
              throw ::build2::cl::unknown_option (o);
            }
          }

          break;
        }
      }

      switch (arg_mode)
      {
        case ::build2::cl::unknown_mode::skip:
        {
          s.skip ();
          r = true;
          continue;
        }
        case ::build2::cl::unknown_mode::stop:
        {
          break;
        }
        case ::build2::cl::unknown_mode::fail:
        {
          throw ::build2::cl::unknown_argument (o);
        }
      }

      break;
    }

    return r;
  }
}

namespace build2
{
  ::build2::cl::usage_para
  print_b_usage (::std::ostream& os, ::build2::cl::usage_para p)
  {
    CLI_POTENTIALLY_UNUSED (os);

    if (p != ::build2::cl::usage_para::none)
      os << ::std::endl;

    os << "\033[1mSYNOPSIS\033[0m" << ::std::endl
       << ::std::endl
       << "\033[1mb --help\033[0m" << ::std::endl
       << "\033[1mb --version\033[0m" << ::std::endl
       << "\033[1mb\033[0m [\033[4moptions\033[0m] [\033[4mvariables\033[0m] [\033[4mbuildspec\033[0m]\033[0m" << ::std::endl
       << ::std::endl
       << "\033[4mbuildspec\033[0m = \033[4mmeta-operation\033[0m\033[1m(\033[0m\033[4moperation\033[0m\033[1m(\033[0m\033[4mtarget\033[0m...[\033[1m,\033[0m\033[4mparameters\033[0m]\033[1m)\033[0m...\033[1m)\033[0m...\033[0m" << ::std::endl
       << ::std::endl
       << "\033[1mDESCRIPTION\033[0m" << ::std::endl
       << ::std::endl
       << "The \033[1mbuild2\033[0m driver executes a set of meta-operations on operations on targets" << ::std::endl
       << "according to the build specification, or \033[4mbuildspec\033[0m for short. This process can" << ::std::endl
       << "be controlled by specifying driver \033[4moptions\033[0m and build system \033[4mvariables\033[0m." << ::std::endl
       << ::std::endl
       << "Note that \033[4moptions\033[0m, \033[4mvariables\033[0m, and \033[4mbuildspec\033[0m fragments can be specified in any" << ::std::endl
       << "order. To avoid treating an argument that starts with \033[1m'-'\033[0m as an option, add the" << ::std::endl
       << "\033[1m'--'\033[0m separator. To avoid treating an argument that contains \033[1m'='\033[0m as a variable," << ::std::endl
       << "add the second \033[1m'--'\033[0m separator." << ::std::endl;

    p = ::build2::options::print_usage (os, ::build2::cl::usage_para::text);

    if (p != ::build2::cl::usage_para::none)
      os << ::std::endl;

    os << "\033[1mEXIT STATUS\033[0m" << ::std::endl
       << ::std::endl
       << "Non-zero exit status is returned in case of an error." << ::std::endl;

    os << std::endl
       << "\033[1mENVIRONMENT\033[0m" << ::std::endl
       << ::std::endl
       << "The \033[1mHOME\033[0m environment variable is used to determine the user's home directory." << ::std::endl
       << "If it is not set, then \033[1mgetpwuid(3)\033[0m is used instead. This value is used to" << ::std::endl
       << "shorten paths printed in diagnostics by replacing the home directory with \033[1m~/\033[0m." << ::std::endl
       << "It is also made available to \033[1mbuildfile\033[0m's as the \033[1mbuild.home\033[0m variable." << ::std::endl;

    p = ::build2::cl::usage_para::text;

    return p;
  }
}

// Begin epilogue.
//
//
// End epilogue.