src/svn.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 /*
  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 int Svn::youngestRevision()
 126 {
 127     return d->youngestRevision();
 128 }
 129
 130 bool Svn::exportRevision(int revnum)
 131 {
 132     return d->exportRevision(revnum) == EXIT_SUCCESS;
 133 }
 134
 135 SvnPrivate::SvnPrivate(const QString &pathToRepository)
 136     : global_pool(NULL)
 137 {
 138     openRepository(pathToRepository);
 139
 140     // get the youngest revision
 141     svn_fs_youngest_rev(&youngest_rev, fs, global_pool);
 142 }
 143
 144 SvnPrivate::~SvnPrivate()
 145 {
 146     svn_pool_destroy(global_pool);
 147 }
 148
 149 int SvnPrivate::youngestRevision()
 150 {
 151     return youngest_rev;
 152 }
 153
 154 int SvnPrivate::openRepository(const QString &pathToRepository)
 155 {
 156     svn_repos_t *repos;
 157     SVN_ERR(svn_repos_open(&repos, QFile::encodeName(pathToRepository), global_pool));
 158     fs = svn_repos_fs(repos);
 159
 160     return EXIT_SUCCESS;
 161 }
 162
 163 static int pathMode(svn_fs_root_t *fs_root, const char *pathname, apr_pool_t *pool)
 164 {
 165     svn_string_t *propvalue;
 166     SVN_ERR(svn_fs_node_prop(&propvalue, fs_root, pathname, "svn:executable", pool));
 167     int mode = 0100644;
 168     if (propvalue)
 169         mode = 0100755;
 170
 171     // maybe it's a symlink?
 172     SVN_ERR(svn_fs_node_prop(&propvalue, fs_root, pathname, "svn:special", pool));
 173     if (propvalue && strcmp(propvalue->data, "symlink") == 0)
 174         mode = 0120000;
 175
 176     return mode;
 177 }
 178
 179 svn_error_t *QIODevice_write(void *baton, const char *data, apr_size_t *len)
 180 {
 181     QIODevice *device = reinterpret_cast<QIODevice *>(baton);
 182     device->write(data, *len);
 183
 184     if (device->bytesToWrite() > 16384)
 185         device->waitForBytesWritten(0);
 186     return SVN_NO_ERROR;
 187 }
 188
 189 static svn_stream_t *streamForDevice(QIODevice *device, apr_pool_t *pool)
 190 {
 191     svn_stream_t *stream = svn_stream_create(device, pool);
 192     svn_stream_set_write(stream, QIODevice_write);
 193
 194     return stream;
 195 }
 196
 197 static int dumpBlob(Repository::Transaction *txn, svn_fs_root_t *fs_root,
 198                     const char *pathname, const QString &finalPathName, apr_pool_t *pool)
 199 {
 200     // what type is it?
 201     int mode = pathMode(fs_root, pathname, pool);
 202
 203     svn_filesize_t stream_length;
 204
 205     SVN_ERR(svn_fs_file_length(&stream_length, fs_root, pathname, pool));
 206     QIODevice *io = txn->addFile(finalPathName, mode, stream_length);
 207
 208 #ifndef DRY_RUN
 209     // open the file
 210     svn_stream_t *in_stream, *out_stream;
 211     SVN_ERR(svn_fs_file_contents(&in_stream, fs_root, pathname, pool));
 212
 213     // open a generic svn_stream_t for the QIODevice
 214     out_stream = streamForDevice(io, pool);
 215     SVN_ERR(svn_stream_copy(in_stream, out_stream, pool));
 216
 217     // print an ending newline
 218     io->putChar('\n');
 219 #endif
 220
 221     return EXIT_SUCCESS;
 222 }
 223
 224 static int recursiveDumpDir(Repository::Transaction *txn, svn_fs_root_t *fs_root,
 225                             const QByteArray &pathname, const QString &finalPathName,
 226                             apr_pool_t *pool)
 227 {
 228     // get the dir listing
 229     apr_hash_t *entries;
 230     SVN_ERR(svn_fs_dir_entries(&entries, fs_root, pathname, pool));
 231     AprAutoPool dirpool(pool);
 232
 233     for (apr_hash_index_t *i = apr_hash_first(pool, entries); i; i = apr_hash_next(i)) {
 234         dirpool.clear();
 235         const void *vkey;
 236         void *value;
 237         apr_hash_this(i, &vkey, NULL, &value);
 238
 239         svn_fs_dirent_t *dirent = reinterpret_cast<svn_fs_dirent_t *>(value);
 240         QByteArray entryName = pathname + '/' + dirent->name;
 241         QString entryFinalName = finalPathName + '/' + dirent->name;
 242
 243         if (dirent->kind == svn_node_dir) {
 244             if (recursiveDumpDir(txn, fs_root, entryName, entryFinalName, dirpool) == EXIT_FAILURE)
 245                 return EXIT_FAILURE;
 246         } else if (dirent->kind == svn_node_file) {
 247             if (dumpBlob(txn, fs_root, entryName, entryFinalName, dirpool) == EXIT_FAILURE)
 248                 return EXIT_FAILURE;
 249         }
 250     }
 251 }
 252
 253 time_t get_epoch(char *svn_date)
 254 {
 255     struct tm tm;
 256     memset(&tm, 0, sizeof tm);
 257     QByteArray date(svn_date, strlen(svn_date) - 8);
 258     strptime(date, "%Y-%m-%dT%H:%M:%S", &tm);
 259     return mktime(&tm);
 260 }
 261
 262 int SvnPrivate::exportRevision(int revnum)
 263 {
 264     AprAutoPool pool(global_pool.data());
 265
 266     // open this revision:
 267     qDebug() << "Exporting revision" << revnum;
 268     svn_fs_root_t *fs_root;
 269     SVN_ERR(svn_fs_revision_root(&fs_root, fs, revnum, pool));
 270
 271     // find out what was changed in this revision:
 272     QHash<QString, Repository::Transaction *> transactions;
 273     apr_hash_t *changes;
 274     SVN_ERR(svn_fs_paths_changed(&changes, fs_root, pool));
 275     AprAutoPool revpool(pool.data());
 276     for (apr_hash_index_t *i = apr_hash_first(pool, changes); i; i = apr_hash_next(i)) {
 277         revpool.clear();
 278
 279         const void *vkey;
 280         void *value;
 281         apr_hash_this(i, &vkey, NULL, &value);
 282         const char *key = reinterpret_cast<const char *>(vkey);
 283
 284         // is this a directory?
 285         svn_boolean_t is_dir;
 286         SVN_ERR(svn_fs_is_dir(&is_dir, fs_root, key, revpool));
 287         if (is_dir) {
 288             // was this directory copied from somewhere?
 289             svn_revnum_t rev_from;
 290             const char *path_from;
 291             SVN_ERR(svn_fs_copied_from(&rev_from, &path_from, fs_root, key, revpool));
 292
 293             if (path_from == NULL)
 294                 // no, it's a new directory being added
 295                 // Git doesn't handle directories, so we don't either
 296                 continue;
 297
 298             qDebug() << "..." << key << "was copied from" << path_from;
 299         }
 300
 301         QString current = QString::fromUtf8(key);
 302
 303         // find the first rule that matches this pathname
 304         bool foundMatch = false;
 305         foreach (Rules::Match rule, matchRules) {
 306             if (rule.rx.exactMatch(current)) {
 307                 foundMatch = true;
 308                 QString repository = current;
 309                 QString branch = current;
 310                 QString path = current;
 311
 312                 // do the replacement
 313                 repository.replace(rule.rx, rule.repository);
 314                 branch.replace(rule.rx, rule.branch);
 315                 path.replace(rule.rx, rule.path);
 316
 317                 qDebug() << "..." << qPrintable(current) << "rev" << revnum << "->"
 318                          << qPrintable(repository) << qPrintable(branch) << qPrintable(path);
 319
 320                 Repository::Transaction *txn = transactions.value(repository, 0);
 321                 if (!txn) {
 322                     Repository *repo = repositories.value(repository, 0);
 323                     if (!repo) {
 324                         qCritical() << "Rule" << rule.rx.pattern()
 325                                     << "references unknown repository" << repository;
 326                         return EXIT_FAILURE;
 327                     }
 328
 329                     QString svnprefix = current;
 330                     if (svnprefix.endsWith(path))
 331                         svnprefix.chop(path.length());
 332
 333                     txn = repo->newTransaction(branch, svnprefix, revnum);
 334                     if (!txn)
 335                         return EXIT_FAILURE;
 336
 337                     transactions.insert(repository, txn);
 338                 }
 339
 340                 svn_fs_path_change_t *change = reinterpret_cast<svn_fs_path_change_t *>(value);
 341                 if (change->change_kind == svn_fs_path_change_delete)
 342                     txn->deleteFile(path);
 343                 else if (!is_dir)
 344                     dumpBlob(txn, fs_root, key, path, revpool);
 345                 else
 346                     recursiveDumpDir(txn, fs_root, key, path, revpool);
 347
 348                 break;
 349             }
 350         }
 351
 352         if (!foundMatch) {
 353             qCritical() << current << "did not match any rules; cannot continue";
 354             return EXIT_FAILURE;
 355         }
 356     }
 357     revpool.clear();
 358
 359     if (transactions.isEmpty())
 360         return EXIT_SUCCESS;    // no changes?
 361
 362     // now create the commit
 363     apr_hash_t *revprops;
 364     SVN_ERR(svn_fs_revision_proplist(&revprops, fs, revnum, pool));
 365     svn_string_t *svnauthor = (svn_string_t*)apr_hash_get(revprops, "svn:author", APR_HASH_KEY_STRING);
 366     svn_string_t *svndate = (svn_string_t*)apr_hash_get(revprops, "svn:date", APR_HASH_KEY_STRING);
 367     svn_string_t *svnlog = (svn_string_t*)apr_hash_get(revprops, "svn:log", APR_HASH_KEY_STRING);
 368
 369     QByteArray log = (char *)svnlog->data;
 370     QByteArray authorident = identities.value((char *)svnauthor->data);
 371     time_t epoch = get_epoch((char*)svndate->data);
 372     if (authorident.isEmpty()) {
 373         if (!svnauthor || svn_string_isempty(svnauthor))
 374             authorident = "nobody <nobody@localhost>";
 375         else
 376             authorident = svnauthor->data + QByteArray(" <") +
 377                           svnauthor->data + QByteArray("@localhost>");
 378     }
 379
 380     foreach (Repository::Transaction *txn, transactions) {
 381         txn->setAuthor(authorident);
 382         txn->setDateTime(epoch);
 383         txn->setLog(log);
 384
 385         txn->commit();
 386         delete txn;
 387     }
 388
 389     return EXIT_SUCCESS;
 390 }