From 626348009e74d2ec6e9f500d27f60728b4fc81df Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 2 Apr 2015 11:53:01 +0200
Subject: Add command line option to set verbosity level

-v sets it to 1 (shows actual command lines)
--verbose sets it to any value in the 0-5 range
---
 build/options.cxx | 518 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 518 insertions(+)
 create mode 100644 build/options.cxx

(limited to 'build/options.cxx')

diff --git a/build/options.cxx b/build/options.cxx
new file mode 100644
index 0000000..0d4248d
--- /dev/null
+++ b/build/options.cxx
@@ -0,0 +1,518 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+// Begin prologue.
+//
+//
+// End prologue.
+
+#include <build/options>
+
+#include <map>
+#include <set>
+#include <string>
+#include <vector>
+#include <ostream>
+#include <sstream>
+
+namespace cli
+{
+  // 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 () << "'";
+  }
+
+  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";
+  }
+
+  // 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 ();
+  }
+
+  template <typename X>
+  struct parser
+  {
+    static void
+    parse (X& x, scanner& s)
+    {
+      std::string o (s.next ());
+
+      if (s.more ())
+      {
+        std::string v (s.next ());
+        std::istringstream is (v);
+        if (!(is >> x && is.eof ()))
+          throw invalid_value (o, v);
+      }
+      else
+        throw missing_value (o);
+    }
+  };
+
+  template <>
+  struct parser<bool>
+  {
+    static void
+    parse (bool& x, scanner& s)
+    {
+      s.next ();
+      x = true;
+    }
+  };
+
+  template <>
+  struct parser<std::string>
+  {
+    static void
+    parse (std::string& x, scanner& s)
+    {
+      const char* o (s.next ());
+
+      if (s.more ())
+        x = s.next ();
+      else
+        throw missing_value (o);
+    }
+  };
+
+  template <typename X>
+  struct parser<std::vector<X> >
+  {
+    static void
+    parse (std::vector<X>& c, scanner& s)
+    {
+      X x;
+      parser<X>::parse (x, s);
+      c.push_back (x);
+    }
+  };
+
+  template <typename X>
+  struct parser<std::set<X> >
+  {
+    static void
+    parse (std::set<X>& c, scanner& s)
+    {
+      X x;
+      parser<X>::parse (x, s);
+      c.insert (x);
+    }
+  };
+
+  template <typename K, typename V>
+  struct parser<std::map<K, V> >
+  {
+    static void
+    parse (std::map<K, V>& m, scanner& s)
+    {
+      std::string o (s.next ());
+
+      if (s.more ())
+      {
+        std::string ov (s.next ());
+        std::string::size_type p = ov.find ('=');
+
+        if (p == std::string::npos)
+        {
+          K k = K ();
+
+          if (!ov.empty ())
+          {
+            std::istringstream ks (ov);
+
+            if (!(ks >> k && ks.eof ()))
+              throw invalid_value (o, ov);
+          }
+
+          m[k] = V ();
+        }
+        else
+        {
+          K k = K ();
+          V v = V ();
+          std::string kstr (ov, 0, p);
+          std::string vstr (ov, p + 1);
+
+          if (!kstr.empty ())
+          {
+            std::istringstream ks (kstr);
+
+            if (!(ks >> k && ks.eof ()))
+              throw invalid_value (o, ov);
+          }
+
+          if (!vstr.empty ())
+          {
+            std::istringstream vs (vstr);
+
+            if (!(vs >> v && vs.eof ()))
+              throw invalid_value (o, ov);
+          }
+
+          m[k] = v;
+        }
+      }
+      else
+        throw missing_value (o);
+    }
+  };
+
+  template <typename X, typename T, T X::*M>
+  void
+  thunk (X& x, scanner& s)
+  {
+    parser<T>::parse (x.*M, s);
+  }
+}
+
+#include <map>
+#include <cstring>
+
+// options
+//
+
+options::
+options ()
+: help_ (),
+  version_ (),
+  v_ (),
+  verbose_ (0)
+{
+}
+
+options::
+options (int& argc,
+         char** argv,
+         bool erase,
+         ::cli::unknown_mode opt,
+         ::cli::unknown_mode arg)
+: help_ (),
+  version_ (),
+  v_ (),
+  verbose_ (0)
+{
+  ::cli::argv_scanner s (argc, argv, erase);
+  _parse (s, opt, arg);
+}
+
+options::
+options (int start,
+         int& argc,
+         char** argv,
+         bool erase,
+         ::cli::unknown_mode opt,
+         ::cli::unknown_mode arg)
+: help_ (),
+  version_ (),
+  v_ (),
+  verbose_ (0)
+{
+  ::cli::argv_scanner s (start, argc, argv, erase);
+  _parse (s, opt, arg);
+}
+
+options::
+options (int& argc,
+         char** argv,
+         int& end,
+         bool erase,
+         ::cli::unknown_mode opt,
+         ::cli::unknown_mode arg)
+: help_ (),
+  version_ (),
+  v_ (),
+  verbose_ (0)
+{
+  ::cli::argv_scanner s (argc, argv, erase);
+  _parse (s, opt, arg);
+  end = s.end ();
+}
+
+options::
+options (int start,
+         int& argc,
+         char** argv,
+         int& end,
+         bool erase,
+         ::cli::unknown_mode opt,
+         ::cli::unknown_mode arg)
+: help_ (),
+  version_ (),
+  v_ (),
+  verbose_ (0)
+{
+  ::cli::argv_scanner s (start, argc, argv, erase);
+  _parse (s, opt, arg);
+  end = s.end ();
+}
+
+options::
+options (::cli::scanner& s,
+         ::cli::unknown_mode opt,
+         ::cli::unknown_mode arg)
+: help_ (),
+  version_ (),
+  v_ (),
+  verbose_ (0)
+{
+  _parse (s, opt, arg);
+}
+
+void options::
+print_usage (::std::ostream& os)
+{
+  os << "--help            Print usage information and exit." << ::std::endl;
+
+  os << "--version         Print version and exit." << ::std::endl;
+
+  os << "-v                Print actual commands being executed." << ::std::endl;
+
+  os << "--verbose <level> Set the diagnostics verbosity to a level between 0 (disabled)" << ::std::endl
+     << "                  and 5 (lots of information)." << ::std::endl;
+}
+
+typedef
+std::map<std::string, void (*) (options&, ::cli::scanner&)>
+_cli_options_map;
+
+static _cli_options_map _cli_options_map_;
+
+struct _cli_options_map_init
+{
+  _cli_options_map_init ()
+  {
+    _cli_options_map_["--help"] = 
+    &::cli::thunk< options, bool, &options::help_ >;
+    _cli_options_map_["--version"] = 
+    &::cli::thunk< options, bool, &options::version_ >;
+    _cli_options_map_["-v"] = 
+    &::cli::thunk< options, bool, &options::v_ >;
+    _cli_options_map_["--verbose"] = 
+    &::cli::thunk< options, std::uint16_t, &options::verbose_ >;
+  }
+};
+
+static _cli_options_map_init _cli_options_map_init_;
+
+bool options::
+_parse (const char* o, ::cli::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;
+}
+
+void options::
+_parse (::cli::scanner& s,
+        ::cli::unknown_mode opt_mode,
+        ::cli::unknown_mode arg_mode)
+{
+  bool opt = true;
+
+  while (s.more ())
+  {
+    const char* o = s.peek ();
+
+    if (std::strcmp (o, "--") == 0)
+    {
+      s.skip ();
+      opt = false;
+      continue;
+    }
+
+    if (opt && _parse (o, s));
+    else if (opt && std::strncmp (o, "-", 1) == 0 && o[1] != '\0')
+    {
+      switch (opt_mode)
+      {
+        case ::cli::unknown_mode::skip:
+        {
+          s.skip ();
+          continue;
+        }
+        case ::cli::unknown_mode::stop:
+        {
+          break;
+        }
+        case ::cli::unknown_mode::fail:
+        {
+          throw ::cli::unknown_option (o);
+        }
+      }
+
+      break;
+    }
+    else
+    {
+      switch (arg_mode)
+      {
+        case ::cli::unknown_mode::skip:
+        {
+          s.skip ();
+          continue;
+        }
+        case ::cli::unknown_mode::stop:
+        {
+          break;
+        }
+        case ::cli::unknown_mode::fail:
+        {
+          throw ::cli::unknown_argument (o);
+        }
+      }
+
+      break;
+    }
+  }
+}
+
+// Begin epilogue.
+//
+//
+// End epilogue.
+
-- 
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