source: smplayer/trunk/getrev/main.cpp@ 103

/*  smplayer, GUI front-end for mplayer.
    Copyright (C) 2007 Ricardo Villalba <rvm@escomposlinux.org>

    This program 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.

    This program 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 <QCoreApplication>
#include <QProcess>
#include <QFile>
#include <stdio.h>
#include <stdlib.h>

//! Tries to get the revision by running "svn info"
QString get_from_svn_info() {
        QString revision;

        QProcess p;
        p.setEnvironment( QStringList() << "LC_ALL=C" );
        p.setProcessChannelMode(QProcess::MergedChannels);
        p.start( "svn", QStringList() << "info" );
        p.waitForStarted();
        p.waitForFinished();

        QByteArray line;
        QRegExp rx("^Revision: (\\d+)");
        while (p.canReadLine()) {
                line = p.readLine();
                if (rx.indexIn(line)!=-1) {
                        revision = rx.cap(1);
                        break;
                }
                //qDebug( line.data() );
        }

        return revision;
}

//! Looks for 'revision="number"' in .svn/entries
QString get_from_entries_1() {
        QString revision;

        QFile f(".svn/entries");
        QRegExp rx("revision=\"(\\d+)\"");
        if ( f.open(QIODevice::ReadOnly) ) {
                QByteArray line;
                while (!f.atEnd()) {
                        line = f.readLine();
                        if (rx.indexIn(line)!=-1) {
                                revision = rx.cap(1);
                                break;
                        }
                        //qDebug( line.data() );
                }
        }

        return revision;
}

//! Looks for 'dir' in .svn/entries
//! the revision is in the next line
QString get_from_entries_2() {
        QString revision;

        QFile f(".svn/entries");
        //QFile f("/tmp/temp/entries");
        QRegExp rx("^dir$");
        if ( f.open(QIODevice::ReadOnly) ) {
                QByteArray line;
                while (!f.atEnd()) {
                        line = f.readLine();
                        line = line.simplified();
                        if (rx.indexIn(line)!=-1) {
                                // Next line
                                line = f.readLine();
                                revision = line.simplified();
                                break;
                        }
                        //qDebug( line.data() );
                }
        }

        return revision;
}

int main( int argc, char ** argv )
{
        QCoreApplication a( argc, argv );

        QString revision;

        revision = get_from_svn_info();

        if (revision.isEmpty()) {
                revision = get_from_entries_1();

                if (revision.isEmpty()) {
                        revision = get_from_entries_2();

                        if (revision.isEmpty()) {
                                revision = "UNKNOWN";
                        }
                }
        }

        printf("#define SVN_REVISION \"SVN-r%s\"\n", revision.toLatin1().data());

        return 0;
};