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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 /*
19  * Based on svn-fast-export by Chris Lee <clee@kde.org>
20  * License: MIT <http://www.opensource.org/licenses/mit-license.php>
21  * URL: git://repo.or.cz/fast-import.git http://repo.or.cz/w/fast-export.git
22  */
23
24 #define _XOPEN_SOURCE
25 #define _LARGEFILE_SUPPORT
26 #define _LARGEFILE64_SUPPORT
27
28 #include "svn.h"
29
30 #include <unistd.h>
31 #include <string.h>
32 #include <stdio.h>
33 #include <time.h>
34 #include <unistd.h>
35
36 #include <apr_lib.h>
37 #include <apr_getopt.h>
38 #include <apr_general.h>
39
40 #include <svn_fs.h>
41 #include <svn_pools.h>
42 #include <svn_repos.h>
43 #include <svn_types.h>
44
45 #include <QFile>
46 #include <QDebug>
47
48 #include "repository.h"
49
50 #undef SVN_ERR
51 #define SVN_ERR(expr) SVN_INT_ERR(expr)
52
53 typedef QList<Rules::Match> MatchRuleList;
54 typedef QHash<QString, Repository *> RepositoryHash;
55 typedef QHash<QByteArray, QByteArray> IdentityHash;
56
57 class AprAutoPool
58 {
59     apr_pool_t *pool;
60     AprAutoPool(const AprAutoPool &);
61     AprAutoPool &operator=(const AprAutoPool &);
62 public:
63     inline AprAutoPool(apr_pool_t *parent = NULL)
64         { pool = svn_pool_create(parent); }
65     inline ~AprAutoPool()
66         { svn_pool_destroy(pool); }
67
68     inline void clear() { svn_pool_clear(pool); }
69     inline apr_pool_t *data() const { return pool; }
70     inline operator apr_pool_t *() const { return pool; }
71 };
72
73 class SvnPrivate
74 {
75 public:
76     MatchRuleList matchRules;
77     RepositoryHash repositories;
78     IdentityHash identities;
79
80     SvnPrivate(const QString &pathToRepository);
81     ~SvnPrivate();
82     int youngestRevision();
83     int exportRevision(int revnum);
84
85     int openRepository(const QString &pathToRepository);
86
87 private:
88     AprAutoPool global_pool;
89     svn_fs_t *fs;
90     svn_revnum_t youngest_rev;
91 };
92
93 void Svn::initialize()
94 {
95     // initialize APR or exit
96     if (apr_initialize() != APR_SUCCESS) {
97         fprintf(stderr, "You lose at apr_initialize().\n");
98         exit(1);
99     }
100
101     // static destructor
102     static struct Destructor { ~Destructor() { apr_terminate(); } } destructor;
103 }
104
105 Svn::Svn(const QString &pathToRepository)
106     : d(new SvnPrivate(pathToRepository))
107 {
108 }
109
110 Svn::~Svn()
111 {
112     delete d;
113 }
114
115 void Svn::setMatchRules(const MatchRuleList &matchRules)
116 {
117     d->matchRules = matchRules;
118 }
119
120 void Svn::setRepositories(const RepositoryHash &repositories)
121 {
122     d->repositories = repositories;
123 }
124
125 void Svn::setIdentityMap(const IdentityHash &identityMap)
126 {
127     d->identities = identityMap;
128 }
129
130 int Svn::youngestRevision()
131 {
132     return d->youngestRevision();
133 }
134
135 bool Svn::exportRevision(int revnum)
136 {
137     return d->exportRevision(revnum) == EXIT_SUCCESS;
138 }
139
140 SvnPrivate::SvnPrivate(const QString &pathToRepository)
141     : global_pool(NULL)
142 {
143     openRepository(pathToRepository);
144
145     // get the youngest revision
146     svn_fs_youngest_rev(&youngest_rev, fs, global_pool);
147 }
148
149 SvnPrivate::~SvnPrivate()
150 {
151     svn_pool_destroy(global_pool);
152 }
153
154 int SvnPrivate::youngestRevision()
155 {
156     return youngest_rev;
157 }
158
159 int SvnPrivate::openRepository(const QString &pathToRepository)
160 {
161     svn_repos_t *repos;
162     SVN_ERR(svn_repos_open(&repos, QFile::encodeName(pathToRepository), global_pool));
163     fs = svn_repos_fs(repos);
164
165     return EXIT_SUCCESS;
166 }
167
168 enum RuleType { AnyRule = 0, NoIgnoreRule = 0x01, NoRecurseRule = 0x02 };
169
170 static MatchRuleList::ConstIterator
171 findMatchRule(const MatchRuleList &matchRules, int revnum, const QString &current,
172               int ruleMask = AnyRule)
173 {
174     MatchRuleList::ConstIterator it = matchRules.constBegin(),
175                                 end = matchRules.constEnd();
176     for ( ; it != end; ++it) {
177         if (it->minRevision > revnum)
178             continue;
179         if (it->maxRevision != -1 && it->maxRevision < revnum)
180             continue;
181         if (it->action == Rules::Match::Ignore && ruleMask & NoIgnoreRule)
182             continue;
183         if (it->action == Rules::Match::Recurse && ruleMask & NoRecurseRule)
184             continue;
185         if (it->rx.indexIn(current) == 0)
186             return it;
187     }
188
189     // no match
190     return end;
191 }
192
193 static void splitPathName(const Rules::Match &rule, const QString &pathName, QString *svnprefix_p,
194                           QString *repository_p, QString *branch_p, QString *path_p)
195 {
196     QString svnprefix = pathName;
197     svnprefix.truncate(rule.rx.matchedLength());
198     if (svnprefix_p)
199         *svnprefix_p = svnprefix;
200
201     if (repository_p) {
202         *repository_p = svnprefix;
203         repository_p->replace(rule.rx, rule.repository);
204     }
205
206     if (branch_p) {
207         *branch_p = svnprefix;
208         branch_p->replace(rule.rx, rule.branch);
209     }
210
211     if (path_p)
212         *path_p = pathName.mid(svnprefix.length());
213 }
214
215 static int pathMode(svn_fs_root_t *fs_root, const char *pathname, apr_pool_t *pool)
216 {
217     svn_string_t *propvalue;
218     SVN_ERR(svn_fs_node_prop(&propvalue, fs_root, pathname, "svn:executable", pool));
219     int mode = 0100644;
220     if (propvalue)
221         mode = 0100755;
222
223     return mode;
224 }
225
226 svn_error_t *QIODevice_write(void *baton, const char *data, apr_size_t *len)
227 {
228     QIODevice *device = reinterpret_cast<QIODevice *>(baton);
229     device->write(data, *len);
230
231     while (device->bytesToWrite() > 32*1024) {
232         if (!device->waitForBytesWritten(-1)) {
233             qFatal("Failed to write to process: %s", qPrintable(device->errorString()));
234             return svn_error_createf(APR_EOF, SVN_NO_ERROR, "Failed to write to process: %s",
235                                      qPrintable(device->errorString()));
236         }
237     }
238     return SVN_NO_ERROR;
239 }
240
241 static svn_stream_t *streamForDevice(QIODevice *device, apr_pool_t *pool)
242 {
243     svn_stream_t *stream = svn_stream_create(device, pool);
244     svn_stream_set_write(stream, QIODevice_write);
245
246     return stream;
247 }
248
249 static int dumpBlob(Repository::Transaction *txn, svn_fs_root_t *fs_root,
250                     const char *pathname, const QString &finalPathName, apr_pool_t *pool)
251 {
252     AprAutoPool dumppool(pool);
253     // what type is it?
254     int mode = pathMode(fs_root, pathname, dumppool);
255
256     svn_filesize_t stream_length;
257
258     SVN_ERR(svn_fs_file_length(&stream_length, fs_root, pathname, dumppool));
259
260 #ifndef DRY_RUN
261     // open the file
262     svn_stream_t *in_stream, *out_stream;
263     SVN_ERR(svn_fs_file_contents(&in_stream, fs_root, pathname, dumppool));
264 #endif
265
266     // maybe it's a symlink?
267     svn_string_t *propvalue;
268     SVN_ERR(svn_fs_node_prop(&propvalue, fs_root, pathname, "svn:special", dumppool));
269     if (propvalue) {
270         apr_size_t len = strlen("link ");
271 #ifndef DRY_RUN
272         QByteArray buf;
273         buf.reserve(len);
274         SVN_ERR(svn_stream_read(in_stream, buf.data(), &len));
275         if (len != strlen("link ") || strncmp(buf, "link ", len) != 0)
276             qFatal("file %s is svn:special but not a symlink", pathname);
277 #endif
278         mode = 0120000;
279         stream_length -= len;
280     }
281
282     QIODevice *io = txn->addFile(finalPathName, mode, stream_length);
283
284 #ifndef DRY_RUN
285     // open a generic svn_stream_t for the QIODevice
286     out_stream = streamForDevice(io, dumppool);
287     SVN_ERR(svn_stream_copy(in_stream, out_stream, dumppool));
288     svn_stream_close(out_stream);
289     svn_stream_close(in_stream);
290
291     // print an ending newline
292     io->putChar('\n');
293 #endif
294
295     return EXIT_SUCCESS;
296 }
297
298 static int recursiveDumpDir(Repository::Transaction *txn, svn_fs_root_t *fs_root,
299                             const QByteArray &pathname, const QString &finalPathName,
300                             apr_pool_t *pool)
301 {
302     // get the dir listing
303     apr_hash_t *entries;
304     SVN_ERR(svn_fs_dir_entries(&entries, fs_root, pathname, pool));
305     AprAutoPool dirpool(pool);
306
307     for (apr_hash_index_t *i = apr_hash_first(pool, entries); i; i = apr_hash_next(i)) {
308         dirpool.clear();
309         const void *vkey;
310         void *value;
311         apr_hash_this(i, &vkey, NULL, &value);
312
313         svn_fs_dirent_t *dirent = reinterpret_cast<svn_fs_dirent_t *>(value);
314         QByteArray entryName = pathname + '/' + dirent->name;
315         QString entryFinalName = finalPathName + dirent->name;
316
317         if (dirent->kind == svn_node_dir) {
318             entryFinalName += '/';
319             if (recursiveDumpDir(txn, fs_root, entryName, entryFinalName, dirpool) == EXIT_FAILURE)
320                 return EXIT_FAILURE;
321         } else if (dirent->kind == svn_node_file) {
322             printf("+");
323             fflush(stdout);
324             if (dumpBlob(txn, fs_root, entryName, entryFinalName, dirpool) == EXIT_FAILURE)
325                 return EXIT_FAILURE;
326         }
327     }
328
329     return EXIT_SUCCESS;
330 }
331
332 static bool wasDir(svn_fs_t *fs, int revnum, const char *pathname, apr_pool_t *pool)
333 {
334     AprAutoPool subpool(pool);
335     svn_fs_root_t *fs_root;
336     if (svn_fs_revision_root(&fs_root, fs, revnum, subpool) != SVN_NO_ERROR)
337         return false;
338
339     svn_boolean_t is_dir;
340     if (svn_fs_is_dir(&is_dir, fs_root, pathname, subpool) != SVN_NO_ERROR)
341         return false;
342
343     return is_dir;
344 }
345
346 time_t get_epoch(char *svn_date)
347 {
348     struct tm tm;
349     memset(&tm, 0, sizeof tm);
350     QByteArray date(svn_date, strlen(svn_date) - 8);
351     strptime(date, "%Y-%m-%dT%H:%M:%S", &tm);
352     return timegm(&tm);
353 }
354
355 class SvnRevision
356 {
357 public:
358     AprAutoPool pool;
359     QHash<QString, Repository::Transaction *> transactions;
360     MatchRuleList matchRules;
361     RepositoryHash repositories;
362     IdentityHash identities;
363
364     svn_fs_t *fs;
365     svn_fs_root_t *fs_root;
366     int revnum;
367
368     // must call fetchRevProps first:
369     QByteArray authorident;
370     QByteArray log;
371     uint epoch;
372
373     SvnRevision(int revision, svn_fs_t *f, apr_pool_t *parent_pool)
374         : pool(parent_pool), fs(f), fs_root(0), revnum(revision)
375     {
376     }
377
378     int open()
379     {
380         SVN_ERR(svn_fs_revision_root(&fs_root, fs, revnum, pool));
381         return EXIT_SUCCESS;
382     }
383
384     int prepareTransactions();
385     int fetchRevProps();
386     int commit();
387
388     int exportEntry(const char *path, const svn_fs_path_change_t *change, apr_hash_t *changes);
389     int exportDispatch(const char *path, const svn_fs_path_change_t *change,
390                        const char *path_from, svn_revnum_t rev_from,
391                        apr_hash_t *changes, const QString &current, const Rules::Match &rule,
392                        apr_pool_t *pool);
393     int exportInternal(const char *path, const svn_fs_path_change_t *change,
394                        const char *path_from, svn_revnum_t rev_from,
395                        const QString &current, const Rules::Match &rule);
396     int recurse(const char *path, const svn_fs_path_change_t *change,
397                 const char *path_from, svn_revnum_t rev_from,
398                 apr_hash_t *changes, apr_pool_t *pool);
399 };
400
401 int SvnPrivate::exportRevision(int revnum)
402 {
403     SvnRevision rev(revnum, fs, global_pool);
404     rev.matchRules = matchRules;
405     rev.repositories = repositories;
406     rev.identities = identities;
407
408     // open this revision:
409     printf("Exporting revision %d ", revnum);
410     fflush(stdout);
411
412     if (rev.open() == EXIT_FAILURE)
413         return EXIT_FAILURE;
414
415     if (rev.prepareTransactions() == EXIT_FAILURE)
416         return EXIT_FAILURE;
417
418     if (rev.transactions.isEmpty()) {
419         printf(" nothing to do\n");
420         return EXIT_SUCCESS;    // no changes?
421     }
422
423     if (rev.commit() == EXIT_FAILURE)
424         return EXIT_FAILURE;
425
426     printf(" done\n");
427     return EXIT_SUCCESS;
428 }
429
430 int SvnRevision::prepareTransactions()
431 {
432     // find out what was changed in this revision:
433     apr_hash_t *changes;
434     SVN_ERR(svn_fs_paths_changed(&changes, fs_root, pool));
435     for (apr_hash_index_t *i = apr_hash_first(pool, changes); i; i = apr_hash_next(i)) {
436         const void *vkey;
437         void *value;
438         apr_hash_this(i, &vkey, NULL, &value);
439         const char *key = reinterpret_cast<const char *>(vkey);
440         svn_fs_path_change_t *change = reinterpret_cast<svn_fs_path_change_t *>(value);
441
442         if (exportEntry(key, change, changes) == EXIT_FAILURE)
443             return EXIT_FAILURE;
444     }
445
446     return EXIT_SUCCESS;
447 }
448
449 int SvnRevision::fetchRevProps()
450 {
451     apr_hash_t *revprops;
452     SVN_ERR(svn_fs_revision_proplist(&revprops, fs, revnum, pool));
453     svn_string_t *svnauthor = (svn_string_t*)apr_hash_get(revprops, "svn:author", APR_HASH_KEY_STRING);
454     svn_string_t *svndate = (svn_string_t*)apr_hash_get(revprops, "svn:date", APR_HASH_KEY_STRING);
455     svn_string_t *svnlog = (svn_string_t*)apr_hash_get(revprops, "svn:log", APR_HASH_KEY_STRING);
456
457     log = (char *)svnlog->data;
458     authorident = svnauthor ? identities.value((char *)svnauthor->data) : QByteArray();
459     epoch = get_epoch((char*)svndate->data);
460     if (authorident.isEmpty()) {
461         if (!svnauthor || svn_string_isempty(svnauthor))
462             authorident = "nobody <nobody@localhost>";
463         else
464             authorident = svnauthor->data + QByteArray(" <") +
465                           svnauthor->data + QByteArray("@localhost>");
466     }
467     return EXIT_SUCCESS;
468 }
469
470 int SvnRevision::commit()
471 {
472     // now create the commit
473     if (fetchRevProps() != EXIT_SUCCESS)
474         return EXIT_FAILURE;
475     foreach (Repository::Transaction *txn, transactions) {
476         txn->setAuthor(authorident);
477         txn->setDateTime(epoch);
478         txn->setLog(log);
479
480         txn->commit();
481         delete txn;
482     }
483
484     return EXIT_SUCCESS;
485 }
486
487 int SvnRevision::exportEntry(const char *key, const svn_fs_path_change_t *change,
488                              apr_hash_t *changes)
489 {
490     AprAutoPool revpool(pool.data());
491     QString current = QString::fromUtf8(key);
492
493     // was this copied from somewhere?
494     svn_revnum_t rev_from;
495     const char *path_from;
496     SVN_ERR(svn_fs_copied_from(&rev_from, &path_from, fs_root, key, revpool));
497
498     // is this a directory?
499     svn_boolean_t is_dir;
500     SVN_ERR(svn_fs_is_dir(&is_dir, fs_root, key, revpool));
501     if (is_dir) {
502         if (path_from == NULL) {
503             // no, it's a new directory being added
504             // Git doesn't handle directories, so we don't either
505             //qDebug() << "   mkdir ignored:" << key;
506             return EXIT_SUCCESS;
507         }
508
509         current += '/';
510         qDebug() << "   " << key << "was copied from" << path_from << "rev" << rev_from;
511     }
512
513     // find the first rule that matches this pathname
514     MatchRuleList::ConstIterator match = findMatchRule(matchRules, revnum, current);
515     if (match != matchRules.constEnd()) {
516         const Rules::Match &rule = *match;
517         return exportDispatch(key, change, path_from, rev_from, changes, current, rule, revpool);
518     }
519
520     if (is_dir && path_from != NULL) {
521         qDebug() << current << "is a copy-with-history, auto-recursing";
522         return recurse(key, change, path_from, rev_from, changes, revpool);
523     } else if (wasDir(fs, revnum - 1, key, revpool)) {
524         qDebug() << current << "was a directory; ignoring";
525     } else if (change->change_kind == svn_fs_path_change_delete) {
526         qDebug() << current << "is being deleted but I don't know anything about it; ignoring";
527     } else {
528         qCritical() << current << "did not match any rules; cannot continue";
529         return EXIT_FAILURE;
530     }
531
532     return EXIT_SUCCESS;
533 }
534
535 int SvnRevision::exportDispatch(const char *key, const svn_fs_path_change_t *change,
536                                 const char *path_from, svn_revnum_t rev_from,
537                                 apr_hash_t *changes, const QString &current,
538                                 const Rules::Match &rule, apr_pool_t *pool)
539 {
540     switch (rule.action) {
541     case Rules::Match::Ignore:
542         // ignore rule
543         //qDebug() << "   " << qPrintable(current) << "rev" << revnum
544         //         << "-> ignored (rule" << rule << ")";
545         return EXIT_SUCCESS;
546
547     case Rules::Match::Recurse:
548         return recurse(key, change, path_from, rev_from, changes, pool);
549
550     case Rules::Match::Export:
551         return exportInternal(key, change, path_from, rev_from, current, rule);
552     }
553
554     // never reached
555     return EXIT_FAILURE;
556 }
557
558 int SvnRevision::exportInternal(const char *key, const svn_fs_path_change_t *change,
559                                 const char *path_from, svn_revnum_t rev_from,
560                                 const QString &current, const Rules::Match &rule)
561 {
562     QString svnprefix, repository, branch, path;
563     splitPathName(rule, current, &svnprefix, &repository, &branch, &path);
564
565     printf(".");
566     fflush(stdout);
567 //                qDebug() << "   " << qPrintable(current) << "rev" << revnum << "->"
568 //                         << qPrintable(repository) << qPrintable(branch) << qPrintable(path);
569
570     if (path.isEmpty() && path_from != NULL) {
571         QString previous = QString::fromUtf8(path_from) + '/';
572         MatchRuleList::ConstIterator prevmatch =
573             findMatchRule(matchRules, rev_from, previous, NoIgnoreRule);
574         if (prevmatch != matchRules.constEnd()) {
575             QString prevsvnprefix, prevrepository, prevbranch, prevpath;
576             splitPathName(*prevmatch, previous, &prevsvnprefix, &prevrepository,
577                           &prevbranch, &prevpath);
578
579             if (!prevpath.isEmpty()) {
580                 qDebug() << qPrintable(current) << "is a partial branch of repository"
581                          << qPrintable(prevrepository) << "branch"
582                          << qPrintable(prevbranch) << "subdir"
583                          << qPrintable(prevpath);
584             } else if (prevrepository != repository) {
585                 qWarning() << qPrintable(current) << "rev" << revnum
586                            << "is a cross-repository copy (from repository"
587                            << qPrintable(prevrepository) << "branch"
588                            << qPrintable(prevbranch) << "path"
589                            << qPrintable(prevpath) << "rev" << rev_from << ")";
590             } else if (prevbranch == branch) {
591                 // same branch and same repository
592                 qDebug() << qPrintable(current) << "rev" << revnum
593                          << "is an SVN rename from"
594                          << qPrintable(previous) << "rev" << rev_from;
595                 return EXIT_SUCCESS;
596             } else {
597                 // same repository but not same branch
598                 // this means this is a plain branch
599                 qDebug() << qPrintable(repository) << ": branch"
600                          << qPrintable(branch) << "is branching from"
601                          << qPrintable(prevbranch);
602
603                 Repository *repo = repositories.value(repository, 0);
604                 if (!repo) {
605                     qCritical() << "Rule" << rule
606                                 << "references unknown repository" << repository;
607                     return EXIT_FAILURE;
608                 }
609
610                 repo->createBranch(branch, revnum, prevbranch, rev_from);
611                 if (rule.annotate) {
612                     // create an annotated tag
613                     fetchRevProps();
614                     repo->createAnnotatedTag(branch, svnprefix, revnum, authorident,
615                                              epoch, log);
616                 }
617                 return EXIT_SUCCESS;
618             }
619         }
620     }
621
622     Repository::Transaction *txn = transactions.value(repository + branch, 0);
623     if (!txn) {
624         Repository *repo = repositories.value(repository, 0);
625         if (!repo) {
626             qCritical() << "Rule" << rule
627                         << "references unknown repository" << repository;
628             return EXIT_FAILURE;
629         }
630
631         txn = repo->newTransaction(branch, svnprefix, revnum);
632         if (!txn)
633             return EXIT_FAILURE;
634
635         transactions.insert(repository + branch, txn);
636     }
637
638     if (change->change_kind == svn_fs_path_change_delete) {
639         txn->deleteFile(path);
640     } else if (!current.endsWith('/')) {
641         dumpBlob(txn, fs_root, key, path, pool);
642     } else {
643         QString pathNoSlash = path;
644         pathNoSlash.chop(1);
645         txn->deleteFile(pathNoSlash);
646         recursiveDumpDir(txn, fs_root, key, path, pool);
647     }
648
649     return EXIT_SUCCESS;
650 }
651
652 int SvnRevision::recurse(const char *path, const svn_fs_path_change_t *change,
653                          const char *path_from, svn_revnum_t rev_from,
654                          apr_hash_t *changes, apr_pool_t *pool)
655 {
656     // get the dir listing
657     apr_hash_t *entries;
658     SVN_ERR(svn_fs_dir_entries(&entries, fs_root, path, pool));
659
660     AprAutoPool dirpool(pool);
661     for (apr_hash_index_t *i = apr_hash_first(pool, entries); i; i = apr_hash_next(i)) {
662         dirpool.clear();
663         const void *vkey;
664         void *value;
665         apr_hash_this(i, &vkey, NULL, &value);
666
667         svn_fs_dirent_t *dirent = reinterpret_cast<svn_fs_dirent_t *>(value);
668         if (dirent->kind != svn_node_dir)
669             continue;           // not a directory, so can't recurse; skip
670
671         QByteArray entry = path + QByteArray("/") + dirent->name;
672         QByteArray entryFrom;
673         if (path_from)
674             entryFrom = path_from + QByteArray("/") + dirent->name;
675
676         // check if this entry is in the changelist for this revision already
677         svn_fs_path_change_t *otherchange =
678             (svn_fs_path_change_t*)apr_hash_get(changes, entry.constData(), APR_HASH_KEY_STRING);
679         if (otherchange && otherchange->change_kind == svn_fs_path_change_add) {
680             qDebug() << entry << "rev" << revnum
681                      << "is in the change-list, deferring to that one";
682             continue;
683         }
684
685         QString current = QString::fromUtf8(entry);
686         if (dirent->kind == svn_node_dir)
687             current += '/';
688
689         // find the first rule that matches this pathname
690         MatchRuleList::ConstIterator match = findMatchRule(matchRules, revnum, current);
691         if (match != matchRules.constEnd()) {
692             if (exportDispatch(entry, change, entryFrom.isNull() ? 0 : entryFrom.constData(),
693                                rev_from, changes, current, *match, dirpool) == EXIT_FAILURE)
694                 return EXIT_FAILURE;
695         } else {
696             qCritical() << current << "rev" << revnum
697                         << "did not match any rules; cannot continue";
698             return EXIT_FAILURE;
699         }
700     }
701
702     return EXIT_SUCCESS;
703 }
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