src/ExcludeMatcher.cpp

   1 /*
   2  * This file is part of the vng project
   3  * Copyright (C) 2008 Thomas Zander <tzander@trolltech.com>
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include "ExcludeMatcher.h"
  20 #include "GitRunner.h"
  21 #include "Logger.h"
  22
  23 #include <QDebug>
  24
  25 ExcludeMatcher::ExcludeMatcher(const Configuration &configuration)
  26     : m_configuration(&configuration)
  27 {
  28 }
  29
  30 bool ExcludeMatcher::isExcluded(const QString &entry)
  31 {
  32     Q_ASSERT(QDir::current() == m_configuration->repository());
  33     Q_ASSERT(! entry.startsWith(QLatin1Char('/'))); // assert relative dir
  34     QString relativePath = QLatin1String("./")+ entry;
  35     if (m_baseMatches.isEmpty()) {
  36         // TODO call git config --get core.excludesfile
  37         QString path = m_configuration->repositoryMetaDir().path() + QLatin1String("/info/exclude");
  38         readExcludes(path);
  39         m_baseMatches << m_cachedMatches[path];
  40     }
  41
  42     // split entry into separate dirs.
  43     QStringList pathSegments = entry.split(QDir::separator(), QString::SkipEmptyParts);
  44     QString fileName = pathSegments.takeLast(); // remove last entry (the actual filename);
  45
  46     if (isExcluded(m_baseMatches, relativePath, fileName))
  47         return true;
  48
  49     pathSegments.insert(0, QLatin1String("."));
  50     QString path;
  51     foreach(QString segment, pathSegments) {
  52         path = path + segment + QDir::separator();
  53         QString ignoreFile = path + QLatin1String(".gitignore");
  54         readExcludes(ignoreFile);
  55         if (isExcluded(m_cachedMatches[ignoreFile], relativePath, fileName))
  56             return true;
  57     }
  58     return false;
  59 }
  60
  61 void ExcludeMatcher::readExcludes(const QString &fileName)
  62 {
  63     if (m_cachedMatches.contains(fileName))
  64         return;
  65     QList<IgnoreLine> items;
  66     QFile ignoreFile(fileName);
  67     if (ignoreFile.exists()) {
  68         if (ignoreFile.open(QFile::ReadOnly)) {
  69             QTextStream file(&ignoreFile);
  70             int line=0;
  71             while(true) {
  72                 ++line;
  73                 QString line = file.readLine();
  74                 if (line.isNull())
  75                     break;
  76                 if (line.isEmpty() || line[0].unicode() == '#')
  77                     continue;
  78                 IgnoreLine ignoreLine;
  79                 ignoreLine.inverted = line[0].unicode() == '!';
  80                 if (ignoreLine.inverted)
  81                     line = line.mid(1);
  82                 ignoreLine.matchOnFileOnly = !line.contains(QLatin1Char('/'));
  83                 if (! ignoreLine.matchOnFileOnly && !line.startsWith(QLatin1Char('*')))
  84                     line = QLatin1String("*") + line;
  85                 QRegExp re(line, Qt::CaseInsensitive, QRegExp::Wildcard);
  86                 ignoreLine.regExp = re;
  87                 if (re.isValid())
  88                     items << ignoreLine;
  89                 else
  90                     Logger::debug() << "invalid entry in " << ignoreFile.fileName() << " line " << line;
  91             }
  92             ignoreFile.close();
  93         }
  94     }
  95     m_cachedMatches.insert(fileName, items);
  96 }
  97
  98 bool ExcludeMatcher::isExcluded(const QList<IgnoreLine> &ignores, const QString &path, const QString &fileName)
  99 {
 100     //qDebug() << "isExcluded" << path << fileName;
 101     foreach (IgnoreLine il, ignores) {
 102         bool matches;
 103         if (il.matchOnFileOnly)
 104             matches = il.regExp.exactMatch(fileName);
 105         else
 106             matches = il.regExp.exactMatch(path);
 107         //qDebug() << "trying on " << il.regExp.pattern() << "fileOnly:" << il.matchOnFileOnly << "inverted:" << il.inverted << (matches?" *** Match!":"");
 108         if (matches != il.inverted)
 109             return true;
 110     }
 111     return false;
 112 }