source: trunk/lib/SVN.h @ 165

#ifndef _theplu_svndigest_svn_
#define _theplu_svndigest_svn_

// $Id: SVN.h 165 2006-08-24 07:38:19Z jari $

/*
  Copyright (C) 2006 Jari Häkkinen

  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 <stdexcept>
#include <string>
#include <vector>

#include <subversion-1/svn_client.h>
#include <subversion-1/svn_types.h>

namespace theplu {
namespace svndigest {

  ///
  /// If something goes wrong in the use of the different SVN classes,
  /// an SVNException is thrown.
  ///
  struct SVNException : public std::runtime_error
  { inline SVNException(const std::string& msg) : runtime_error(msg) {} };

  ///
  /// The SVN class is a front end to the subversion API.
  ///
  /// SVN provides one single global access point to the underlying
  /// subversion API and makes sure that there is only one point of
  /// access for the binary.
  ///
  /// @see Design Patterns (the singleton pattern). Subversion API
  /// documents.
  ///
  class SVN {
  public:

    enum vc_status {
      unversioned=0,
      uptodate,
      unresolved
    };

    ///
    /// @brief The destructor.
    ///
    ~SVN(void);

    ///
    /// @brief Call the underlying svn_client_blame3 for \a path with
    /// \a receiver and \a baton.
    ///
    /// This function is called from SVNblame to do 'svn blame' on an
    /// item. The \a receiver and \a baton is defined in SVNblame and
    /// the \a receiver is called by the underlying subversion API for
    /// every line in \a path provided it the item is under subversion
    /// control. The \a baton is used to communicate anonymous
    /// information through the API to the \a receiver. If \a path is
    /// a binary object an error is returned, all other errors will
    /// generate an SVNException.
    ///
    /// @return SVN_NO_ERROR or SVN_ERR_CLIENT_IS_BINARY_FILE, the
    /// latter can be used to trigger on binary files. Note that
    /// errors return from underlying subversion API must be cleared
    /// by the receiver.
    ///
    /// @see Subversion API (svn_error_clear).
    ///
    svn_error_t * client_blame(const std::string& path,
                               svn_client_blame_receiver_t receiver,
                               void *baton);

    ///
    /// @brief Call the underlying svn_client_info for \a path with \a
    /// receiver and \a baton.
    ///
    /// This function is called from SVNinfo to do 'svn info' on an
    /// item. The \a receiver and \a baton is defined in SVNinfo and
    /// the \a receiver is called by the underlying subversion API if
    /// \a path is under subversion control. The \a baton is used to
    /// communicate anonymous information through the API to the
    /// \a receiver.
    ///
    /// @see Subversion API documentation, SVNinfo
    ///
    void client_info(const std::string& path, svn_info_receiver_t receiver,
                     void *baton);

    ///
    /// @brief Get revision dates.
    ///
    /// Get dates for all commits to the repository. \a root can be a
    /// repository path or a path within a working copy. In the latter
    /// case the corresponding repository will be used to retrieve
    /// commit dates.
    ///
    /// @return Revision dates in a vector where revision is
    /// implicitly defined by vector index, i.e., element 56 in the
    /// resulting vector implies revision 56.
    ///
    /// @note Currently revision 0 (repositoy creation) is not
    /// supported.
    ///
    /// @throw Various error messages generated from the subversion
    /// API.
    ///
    std::vector<std::string> commit_dates(const std::string& path);

    ///
    /// @brief Get an instance of SVN.
    ///
    /// @throw Throws an SVNException if initialization fails in the
    /// underlying subversion API calls.
    ///
    static SVN* instance(void)
    { if (!instance_) instance_=new SVN; return instance_; }

    ///
    /// @throws SVNException if session setup fails.
    ///
    void setup_ra_session(const std::string& path);

    ///
    /// @throws SVNException if access setup fails.
    ///
    void setup_wc_adm_access(const std::string& path);

    ///
    /// @brief Check if entry \a path is under version control
    ///
    /// @return True if \a path is under version control, false
    /// otherwise.
    ///
    vc_status version_controlled(const std::string& path);


  private:
    ///
    /// @brief Constructor
    ///
    /// The only way to create a object of SVN type is by calling
    /// SVN::instance.
    ///
    SVN(void);

    ///
    /// @brief Copy Constructor, not implemented.
    ///
    SVN(const SVN&);

    ///
    /// Free resources when failing to reach end of constructor. 
    ///
    void cleanup_failed_initialization(svn_error_t *err);

    static SVN* instance_;

    // Subversion API stuff

    // Log message receiver
    struct log_receiver_baton {
      std::vector<std::string> commit_dates;
    };
    static svn_error_t *
    log_message_receiver(void *baton, apr_hash_t *changed_paths,
                         svn_revnum_t rev, const char *author, const char *date,
                         const char *msg, apr_pool_t *pool);

    svn_wc_adm_access_t* adm_access_;
    apr_allocator_t* allocator_;
    svn_client_ctx_t* context_;
    apr_pool_t* pool_;
    svn_ra_session_t* ra_session_;
  };

}} // end of namespace svndigest and namespace theplu

#endif