aboutsummaryrefslogtreecommitdiffstats
path: root/src/ruleparser.cpp
blob: 6b23d9475ec8ac69f33af743796a819ffa8b1865 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
/*
 *  Copyright (C) 2007  Thiago Macieira <thiago@kde.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 3 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, see <http://www.gnu.org/licenses/>.
 */

#include <QTextStream>
#include <QList>
#include <QFile>
#include <QDebug>

#include "ruleparser.h"
#include "CommandLineParser.h"

RulesList::RulesList(const QString &filenames)
  : m_filenames(filenames)
{
}

RulesList::~RulesList() {}

void RulesList::load()
{
    foreach(const QString filename, m_filenames.split(',') ) {
        qDebug() << "Loading rules from:" << filename;
        Rules *rules = new Rules(filename);
        m_rules.append(rules);
        rules->load();
        m_allrepositories.append(rules->repositories());
        QList<Rules::Match> matchRules = rules->matchRules();
        m_allMatchRules.append( QList<Rules::Match>(matchRules));
    }
}

const QList<Rules::Repository> RulesList::allRepositories() const
{
  return m_allrepositories;
}

const QList<QList<Rules::Match> > RulesList::allMatchRules() const
{
  return m_allMatchRules;
}

const QList<Rules*> RulesList::rules() const
{
  return m_rules;
}

Rules::Rules(const QString &fn)
    : filename(fn)
{
}

Rules::~Rules()
{
}

const QList<Rules::Repository> Rules::repositories() const
{
    return m_repositories;
}

const QList<Rules::Match> Rules::matchRules() const
{
    return m_matchRules;
}

void Rules::load()
{
    load(filename);
}

void Rules::load(const QString &filename)
{
    qDebug() << "Loading rules from" << filename;
    // initialize the regexps we will use
    QRegExp repoLine("create repository\\s+(\\S+)", Qt::CaseInsensitive);

    QRegExp matchLine("match\\s+(.*)", Qt::CaseInsensitive);
    QRegExp matchActionLine("action\\s+(\\w+)", Qt::CaseInsensitive);
    QRegExp matchRepoLine("repository\\s+(\\S+)", Qt::CaseInsensitive);
    QRegExp matchBranchLine("branch\\s+(\\S+)", Qt::CaseInsensitive);
    QRegExp matchRevLine("(min|max) revision (\\d+)", Qt::CaseInsensitive);
    QRegExp matchAnnotateLine("annotated\\s+(\\S+)", Qt::CaseInsensitive);
    QRegExp matchPrefixLine("prefix\\s+(\\S+)", Qt::CaseInsensitive);
    QRegExp declareLine("declare\\s+(\\S+)\\s*=\\s*(\\S+)", Qt::CaseInsensitive);
    QRegExp variableLine("\\$\\{(\\S+)\\}", Qt::CaseInsensitive);
    QRegExp includeLine("include\\s+(.*)", Qt::CaseInsensitive);

    enum { ReadingNone, ReadingRepository, ReadingMatch } state = ReadingNone;
    Repository repo;
    Match match;
    int lineNumber = 0;

    QFile file(filename);
    if (!file.open(QIODevice::ReadOnly))
        qFatal("Could not read the rules file: %s", qPrintable(filename));

    QTextStream s(&file);
    QStringList lines = s.readAll().split('\n', QString::KeepEmptyParts);

    QStringList::iterator it;
    for(it = lines.begin(); it != lines.end(); ++it) {
        ++lineNumber;
        QString origLine = *it;
        QString line = origLine;

        int hash = line.indexOf('#');
        if (hash != -1)
            line.truncate(hash);
        line = line.trimmed();
        if (line.isEmpty())
            continue;

        bool isIncludeRule = includeLine.exactMatch(line);
        if (isIncludeRule) {
            int index = filename.lastIndexOf("/");
            QString includeFile = filename.left( index + 1) + includeLine.cap(1);
            load(includeFile);
        } else {
            while( variableLine.indexIn(line) != -1 ) {
                if (!m_variables.contains(variableLine.cap(1)))
                    qFatal("Undeclared variable: %s", qPrintable(variableLine.cap(1)));
                line = line.replace(variableLine, m_variables[variableLine.cap(1)]);
            }
            if (state == ReadingRepository) {
                if (matchBranchLine.exactMatch(line)) {
                    Repository::Branch branch;
                    branch.name = matchBranchLine.cap(1);

                    repo.branches += branch;
                    continue;
                } else if (matchRepoLine.exactMatch(line)) {
                    repo.forwardTo = matchRepoLine.cap(1);
                    continue;
                } else if (matchPrefixLine.exactMatch(line)) {
                    repo.prefix = matchPrefixLine.cap(1);
                    continue;
                } else if (line == "end repository") {
                    m_repositories += repo;
                    {
                        // clear out 'repo'
                        Repository temp;
                        std::swap(repo, temp);
                    }
                    state = ReadingNone;
                    continue;
                }
            } else if (state == ReadingMatch) {
                if (matchRepoLine.exactMatch(line)) {
                    match.repository = matchRepoLine.cap(1);
                    continue;
                } else if (matchBranchLine.exactMatch(line)) {
                    match.branch = matchBranchLine.cap(1);
                    continue;
                } else if (matchRevLine.exactMatch(line)) {
                    if (matchRevLine.cap(1) == "min")
                        match.minRevision = matchRevLine.cap(2).toInt();
                    else            // must be max
                        match.maxRevision = matchRevLine.cap(2).toInt();
                    continue;
                } else if (matchPrefixLine.exactMatch(line)) {
                    match.prefix = matchPrefixLine.cap(1);
                    if( match.prefix.startsWith('/'))
                        match.prefix = match.prefix.mid(1);
                    continue;
                } else if (matchActionLine.exactMatch(line)) {
                    QString action = matchActionLine.cap(1);
                    if (action == "export")
                        match.action = Match::Export;
                    else if (action == "ignore")
                        match.action = Match::Ignore;
                    else if (action == "recurse")
                        match.action = Match::Recurse;
                    else
                        qFatal("Invalid action \"%s\" on line %d", qPrintable(action), lineNumber);
                    continue;
                } else if (matchAnnotateLine.exactMatch(line)) {
                    match.annotate = matchAnnotateLine.cap(1) == "true";
                    continue;
                } else if (line == "end match") {
                    if (!match.repository.isEmpty())
                        match.action = Match::Export;
                    m_matchRules += match;
                    Stats::instance()->addRule(match);
                    state = ReadingNone;
                    continue;
                }
            }

            bool isRepositoryRule = repoLine.exactMatch(line);
            bool isMatchRule = matchLine.exactMatch(line);
            bool isVariableRule = declareLine.exactMatch(line);

            if (isRepositoryRule) {
                // repository rule
                state = ReadingRepository;
                repo = Repository(); // clear
                repo.name = repoLine.cap(1);
                repo.lineNumber = lineNumber;
                repo.filename = filename;
            } else if (isMatchRule) {
                // match rule
                state = ReadingMatch;
                match = Match();
                match.rx = QRegExp(matchLine.cap(1), Qt::CaseSensitive, QRegExp::RegExp2);
                if( !match.rx.isValid() )
                    qFatal("Malformed regular expression '%s' in file:'%s':%d, Error: %s",
                           qPrintable(matchLine.cap(1)), qPrintable(filename), lineNumber,
                           qPrintable(match.rx.errorString()));
                match.lineNumber = lineNumber;
                match.filename = filename;
            } else if (isVariableRule) {
                QString variable = declareLine.cap(1);
                QString value = declareLine.cap(2);
                m_variables.insert(variable, value);
            } else {
                qFatal("Malformed line in rules file: line %d: %s",
                       lineNumber, qPrintable(origLine));
            }
        }
    }
}

Stats *Stats::self = 0;

class Stats::Private
{
public:
    Private();

    void printStats() const;
    void ruleMatched(const Rules::Match &rule, const int rev);
    void addRule(const Rules::Match &rule);
private:
    QMap<QString,int> m_usedRules;
};

Stats::Stats() : d(new Private())
{
    use = CommandLineParser::instance()->contains("stats");
}

Stats::~Stats()
{
    delete d;
}

void Stats::init()
{
    if(self)
        delete self;
    self = new Stats();
}

Stats* Stats::instance()
{
    return self;
}

void Stats::printStats() const
{
    if(use)
        d->printStats();
}

void Stats::ruleMatched(const Rules::Match &rule, const int rev)
{
    if(use)
        d->ruleMatched(rule, rev);
}

void Stats::addRule( const Rules::Match &rule)
{
    if(use)
        d->addRule(rule);
}

Stats::Private::Private()
{
}

void Stats::Private::printStats() const
{
    printf("\nRule stats\n");
    foreach(const QString name, m_usedRules.keys()) {
        printf("%s was matched %i times\n", qPrintable(name), m_usedRules[name]);
    }
}

void Stats::Private::ruleMatched(const Rules::Match &rule, const int rev)
{
    Q_UNUSED(rev);
    const QString name = rule.info();
    if(!m_usedRules.contains(name)) {
        m_usedRules.insert(name, 1);
        qWarning() << "WARN: New match rule, should have been added when created.";
    } else {
        m_usedRules[name]++;
    }
}

void Stats::Private::addRule( const Rules::Match &rule)
{
    const QString name = rule.info();
    if(m_usedRules.contains(name))
        qWarning() << "WARN: Rule" << name << "was added multiple times.";
    m_usedRules.insert(name, 0);
}

#ifndef QT_NO_DEBUG_STREAM
QDebug operator<<(QDebug s, const Rules::Match &rule)
{
    s.nospace() << rule.info();
    return s.space();
}

#endif