src/ruleparser.cpp

   1 /*
   2  *  Copyright (C) 2007  Thiago Macieira <thiago@kde.org>
   3  *
   4  *  This program is free software: you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation, either version 2 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <QTextStream>
  19 #include <QFile>
  20 #include <QDebug>
  21
  22 #include "ruleparser.h"
  23
  24 Rules::Rules(const QString &fn)
  25     : filename(fn)
  26 {
  27 }
  28
  29 Rules::~Rules()
  30 {
  31 }
  32
  33 QList<Rules::Repository> Rules::repositories()
  34 {
  35     return m_repositories;
  36 }
  37
  38 QList<Rules::Match> Rules::matchRules()
  39 {
  40     return m_matchRules;
  41 }
  42
  43 void Rules::load()
  44 {
  45     QFile file(filename);
  46     if (!file.open(QIODevice::ReadOnly))
  47         return;
  48
  49     // initialize the regexps we will use
  50     QRegExp repoLine("create repository\\s+(\\S+)", Qt::CaseInsensitive);
  51     QRegExp repoBranchLine("branch\\s+(\\S+)", Qt::CaseInsensitive);
  52
  53     QRegExp matchLine("match\\s+(.*)", Qt::CaseInsensitive);
  54     QRegExp matchActionLine("action\\s+(\\w+)", Qt::CaseInsensitive);
  55     QRegExp matchRepoLine("repository\\s+(\\S+)", Qt::CaseInsensitive);
  56     QRegExp matchBranchLine("branch\\s+(\\S+)", Qt::CaseInsensitive);
  57     QRegExp matchRevLine("(min|max) revision (\\d+)", Qt::CaseInsensitive);
  58
  59     QTextStream s(&file);
  60     enum { ReadingNone, ReadingRepository, ReadingMatch } state = ReadingNone;
  61     Repository repo;
  62     Match match;
  63     int lineNumber = 0;
  64     while (!s.atEnd()) {
  65         ++lineNumber;
  66         QString origLine = s.readLine();
  67         QString line = origLine;
  68
  69         int hash = line.indexOf('#');
  70         if (hash != -1)
  71             line.truncate(hash);
  72         line = line.trimmed();
  73         if (line.isEmpty())
  74             continue;
  75
  76         if (state == ReadingRepository) {
  77             if (repoBranchLine.exactMatch(line)) {
  78                 Repository::Branch branch;
  79                 branch.name = repoBranchLine.cap(1);
  80
  81                 repo.branches += branch;
  82                 continue;
  83             } else if (line == "end repository") {
  84                 m_repositories += repo;
  85                 state = ReadingNone;
  86                 continue;
  87             }
  88         } else if (state == ReadingMatch) {
  89             if (matchRepoLine.exactMatch(line)) {
  90                 match.repository = matchRepoLine.cap(1);
  91                 continue;
  92             } else if (matchBranchLine.exactMatch(line)) {
  93                 match.branch = matchBranchLine.cap(1);
  94                 continue;
  95             } else if (matchRevLine.exactMatch(line)) {
  96                 if (matchRevLine.cap(1) == "min")
  97                     match.minRevision = matchRevLine.cap(2).toInt();
  98                 else            // must be max
  99                     match.maxRevision = matchRevLine.cap(2).toInt();
 100                 continue;
 101             } else if (matchActionLine.exactMatch(line)) {
 102                 QString action = matchActionLine.cap(1);
 103                 if (action == "export")
 104                     match.action = Match::Export;
 105                 else if (action == "ignore")
 106                     match.action = Match::Ignore;
 107                 else if (action == "recurse")
 108                     match.action = Match::Recurse;
 109                 else
 110                     qFatal("Invalid action \"%s\" on line %d", qPrintable(action), lineNumber);
 111                 continue;
 112             } else if (line == "end match") {
 113                 if (!match.repository.isEmpty())
 114                     match.action = Match::Export;
 115                 m_matchRules += match;
 116                 state = ReadingNone;
 117                 continue;
 118             }
 119         }
 120
 121         bool isRepositoryRule = repoLine.exactMatch(line);
 122         bool isMatchRule = matchLine.exactMatch(line);
 123
 124         if (isRepositoryRule) {
 125             // repository rule
 126             state = ReadingRepository;
 127             repo = Repository(); // clear
 128             repo.name = repoLine.cap(1);
 129             repo.lineNumber = lineNumber;
 130         } else if (isMatchRule) {
 131             // match rule
 132             state = ReadingMatch;
 133             match = Match();
 134             match.rx = QRegExp(matchLine.cap(1), Qt::CaseSensitive, QRegExp::RegExp2);
 135             match.lineNumber = lineNumber;
 136         } else {
 137             qFatal("Malformed line in rules file: line %d: %s",
 138                    lineNumber, qPrintable(origLine));
 139         }
 140     }
 141 }
 142
 143 #ifndef QT_NO_DEBUG_STREAM
 144 QDebug operator<<(QDebug s, const Rules::Match &rule)
 145 {
 146     s.nospace() << rule.rx.pattern() << " (line " << rule.lineNumber << ")";
 147     return s.space();
 148 }
 149
 150 #endif