source: trunk/bin/Parameter.cc @ 171

// $Id: Parameter.cc 151 2006-08-13 20:30:02Z jari $

/*
  Copyright (C) 2006 Jari Häkkinen, Peter Johansson

  This file is part of svndigest, http://lev.thep.lu.se/trac/svndigest

  svndigest 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.

  svndigest 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., 59 Temple Place - Suite 330, Boston, MA
  02111-1307, USA.
*/

#include "Parameter.h"
#include "utility.h"
#include <config.h> // this header file is created by configure

#include <iostream>
#include <stdexcept>
#include <string>
#include <sys/stat.h>

namespace theplu {
namespace svndigest {

  Parameter::Parameter(const int argc,const char *argv[])
  {
    defaults();
    for (int i=1; i<argc; i++) {
      bool ok=false;
      std::string myargv(argv[i]);
      if (myargv=="-f" || myargv=="--force"){
          force_=true;
          ok=true;
      }
      else if (myargv=="-h" || myargv=="--help"){
        help();
        exit(0);      // always exit after printing help
      }
      else if (myargv=="-r" || myargv=="--root"){
        if (++i<argc){
          root_= std::string(argv[i]);
          ok=true;
        }
      }
      else if (myargv=="-rev" || myargv=="--revisions") {
          revisions_=true;
          ok=true;
      }
      else if (myargv=="-t" || myargv=="--target"){
        if (++i<argc){
          targetdir_= std::string(argv[i]);
          ok=true;
        }
      }
      else if (myargv=="-v" || myargv=="--verbose"){
          verbose_=true;
          ok=true;
      }
      else if (myargv=="--version"){
          version();
          exit(0);
      }

      if (!ok)
        throw std::runtime_error("svndigest: invalid option: " + myargv +
                                 "\nType 'svndigest --help' for usage.");
    }

    analyse();
  }


  void Parameter::analyse(void)
  {
    using namespace std;

    string workdir(pwd()); // remember current working directory (cwd).

    // Checking that root_ exists and retrieve the absolute path to root_
    if (chdir(root_.c_str()))
      throw runtime_error(string("svndigest: Root directory (") + root_ +
                          ") access failed.");
    root_ = pwd();

    // need to get back to cwd if relative paths are used.
    if (chdir(workdir.c_str()))
      runtime_error(string("svndigest: Failed to access cwd: ") + workdir);

    // Checking that targetdir_ exists and retrieve the absolute path
    // to targetdir_
    if (chdir(targetdir_.c_str()))
      throw runtime_error(string("svndigest: Target directory (") + targetdir_ +
                          ") access failed.");
    targetdir_ = pwd();
    // Checking write permissions for targetdir_
    if (access_rights(targetdir_,"w"))
      throw runtime_error(string("svndigest: No write permission on target ") +
                                 "directory (" + targetdir_ +").");

    // return back to cwd
    if (chdir(workdir.c_str()))
      runtime_error(string("svndigest: Failed to access cwd: ") + workdir);
  }


  void Parameter::defaults(void)
  {
    force_=false;
    revisions_=false;
    root_=".";
    targetdir_=".";
    verbose_=false;
  }


  void Parameter::help(void)
  {
    defaults();
    std::cout << "\n"
              << "usage: svndigest [options]\n"
              << "\n"
              << "svndigest traverses a directory structure (controlled by\n"
              << "subversion) and calculates developer statistics entries.\n"
              << "The top level directory of the directory structure to\n"
              << "traverse is set with the -r option. The result is written to\n"
              << "the current working directory or a directory set with the\n"
              << "-t option.\n"
              << "\n"
              << "Valid options:\n"
              << "  -f [--force]   : remove target directory/file if it exists\n"
              << "                   [no force]. NOTE recursive delete.\n"
              << "  -h [--help]    : display this help and exit\n"
              << "  -r [--root] arg : svn controlled directory to perform\n"
              << "                    statistics calculation on [" 
              << root_ << "]\n"
              << "  -rev [--revisions]: Use revision numbers as time scale\n"
              << "                      instead of dates [dates].\n"
              << "  -t [--target] arg : output directory [" 
              << targetdir_ << "]\n"
              << "  -v [--verbose] : explain what is being done\n"
              << "  --version      : print version information and exit\n"
              << std::endl;
  }


  void Parameter::version(void) const
  {
    using namespace std;
    cout << PACKAGE_STRING
         << "\nCopyright (C) 2006 Jari Häkkinen and Peter Johansson.\n\n"
         << "This is free software; see the source for copying conditions.\n"
         << "There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR\n"
         << "A PARTICULAR PURPOSE." << endl;
  }

}} // of namespace wenni and namespace theplu