source: branches/replacing_gnuplot/bin/Parameter.cc @ 784

// $Id: Parameter.cc 784 2009-04-09 20:18:54Z jari $

/*
  Copyright (C) 2006, 2007, 2008 Jari Häkkinen, Peter Johansson

  This file is part of svndigest, http://dev.thep.lu.se/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 3 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 svndigest. If not, see <http://www.gnu.org/licenses/>.
*/

#include "Parameter.h"

#include "ColumnStream.h"
#include "OptionArg.h"
#include "OptionHelp.h"
#include "OptionSwitch.h"
#include "OptionVersion.h"
#include "utility.h"
#include <config.h> // this header file is created by configure

#include <cassert>
#include <cerrno>
#include <cstddef>
#include <cstring>
#include <fstream>
#include <iostream>
#include <sstream>
#include <stdexcept>
#include <string>
#include <sys/stat.h>

namespace theplu {
namespace svndigest {

  Parameter::Parameter( int argc, char *argv[])
    : cmd_(
     "Mandatory arguments to long options are mandatory for short options too.") 
  {
    init();
    try {
      cmd_.parse(argc, argv);
    }
    catch (cmd_error& e) {
      std::cerr << e.what() << std::endl;
      exit (-1);
    }

    // set default values
    if (!root_->present())
      root_->value(".");

    if (!target_->present())
      target_->value(".");

    if (!config_file_->present())
      config_file_->value(concatenate_path(root_->value(),".svndigest/config"));

    // analyse arguments
    analyse();
  }


  Parameter::~Parameter(void)
  {
    delete config_file_;
    delete copyright_;
    delete force_;
    delete generate_config_;
    delete help_;
    delete ignore_cache_;
    delete report_;
    delete revisions_;
    delete root_;
    delete target_;
    delete verbose_;
    delete version_;
  }


  void Parameter::analyse(void)
  {
    std::string save_wd = pwd();

    // check root but not if -g option given
    if (!generate_config()) {
      check_existence(root_->value());
      check_readable(root_->value());
      if (chdir(root_->value().c_str())) {
        std::stringstream ss;
        ss << "svndigest: cannot read `" << root_->value() << "': " 
           << strerror(errno);
        throw cmd_error(ss.str());
      }
      root_->value(pwd());
      chdir(save_wd.c_str());

      // check target (only if we write report)
      if (report()) {
        check_existence(target_->value());
        check_readable(target_->value());
        std::string base_root = file_name(root_->value());
        std::string path = concatenate_path(target_->value(),base_root); 
        if (access_rights(target_->value().c_str(), "w")) {
          std::stringstream ss;
          ss << "svndigest: cannot create directory `" << path 
             << "': " << strerror(errno);
          throw cmd_error(ss.str());
        }
        if (node_exist(path) && !force()) {
          std::stringstream ss;
          ss << "svndigest: cannot create directory `" << path << "' "
             << strerror(EEXIST);
          throw cmd_error(ss.str());
        }
        if (chdir(target_->value().c_str())) {
          std::stringstream ss;
          ss << "svndigest: cannot read `" << target_->value() << "': " 
             << strerror(errno);
          throw cmd_error(ss.str());
        }
        target_->value(pwd());
        chdir(save_wd.c_str());
      }
    }

    // check config file
    struct stat nodestat;
    // true also if there is a broken symlink named...
    bool config_exists = !lstat(config_file_->value().c_str(), &nodestat);
    // the latter case in order to catch broken symlink
    if (config_file_->present() || config_exists)
      // throws if file does not exists
      check_existence(config_file_->value());
    if (config_exists) {
      // throws if file is not readable
      check_readable(config_file_->value());
      stat(config_file_->value().c_str(), &nodestat);
      if (!S_ISREG(nodestat.st_mode)) {
        std::stringstream ss;
        ss << "svndigest: `" << config_file_->value() 
           << "' is not a regular file";
        throw cmd_error(ss.str());
      }
    }
  }


  void Parameter::check_existence(std::string path) const
  {
    if (node_exist(path))
      return;
    std::stringstream ss;
    ss << "svndigest: cannot stat `" << path << "': " << strerror(errno);
    throw cmd_error(ss.str());
  }

  
  void Parameter::check_readable(std::string path) const
  {
    if (!access_rights(path, "r"))
      return;
    std::stringstream ss;
    ss << "svndigest: cannot open `" << path << "': " << strerror(errno);
    throw cmd_error(ss.str());
  }
  

  std::string Parameter::config_file(void) const
  {
    return config_file_->value();
  }


  bool Parameter::copyright(void) const
  {
    return copyright_->present();
  }


  bool Parameter::force(void) const
  {
    return force_->present();
  }


  bool Parameter::generate_config(void) const
  {
    return generate_config_->present();
  }


  bool Parameter::ignore_cache(void) const
  {
    return ignore_cache_->present();
  }


  void Parameter::init(void)
  {
    // don't use argv[0] because user may rename the binary
    cmd_.program_name() = PACKAGE_NAME;
    config_file_=new OptionArg<std::string>(cmd_, "config-file",
                                "configuration file [<ROOT>/.svndigest/config]");
    config_file_->print_arg("=FILE");
    std::stringstream ss;
    copyright_ = new OptionSwitch(cmd_, "copyright", 
                                  "update copyright statement");

    ss << "if sub-directory named <ROOT> exists in target directory, remove "
       << "sub-directory before writing results";
    force_ = new OptionSwitch(cmd_, "f,force", ss.str());
    ss.str("");

    help_ = new OptionHelp(cmd_);
    generate_config_ = 
      new OptionSwitch(cmd_, "g,generate-config", 
                       "write configuration file to standard output");

    ss.str("");
    ss << "ignore cache files and analyze everything from repository";
    ignore_cache_ = new OptionSwitch(cmd_, "ignore-cache", ss.str());
         
    report_ = new OptionSwitch(cmd_, "report", "create no HTML report", true);

    ss.str("");
    ss << "use revision numbers as time scale instead of dates [dates]";
    revisions_ = new OptionSwitch(cmd_, "revisions", ss.str());

    root_=
      new OptionArg<std::string>(cmd_, "r,root", 
                     "svn controlled directory to perform statistics on [.]");
    root_->print_arg("=ROOT");
    target_ = new OptionArg<std::string>(cmd_, "t,target", 
                                         "output directory [.]");
    target_->print_arg("=TARGET");
    
    verbose_ = new OptionSwitch(cmd_, "v,verbose", "explain what is being done");
    version_ = new OptionVersion(cmd_, "version", 
                                 "print version information and exit", verbose_);

    ss.str("");
    ss << "Report bugs to " << PACKAGE_BUGREPORT << ".\n";
    help_->post_arguments() = ss.str();
    help_->synopsis() = 
      "Generate statistical report for a subversion repository\n";
  }


  bool Parameter::report(void) const
  {
    return report_->value();
  }


  bool Parameter::revisions(void) const
  {
    return revisions_->present();
  }


  std::string Parameter::root(void) const
  {
    return root_->value();
  }

  
  std::string Parameter::targetdir(void) const
  {
    return target_->value();
  }

  
  bool Parameter::verbose(void) const
  {
    return verbose_->present();
  }


}} // of namespace svndigest and namespace theplu