src/VCBackend.cpp

   1 /**
   2  * \file VCBackend.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Lars Gullik Bjønnes
   7  * \author Pavel Sanda
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #include <config.h>
  13
  14 #include "VCBackend.h"
  15 #include "Buffer.h"
  16 #include "LyX.h"
  17 #include "FuncRequest.h"
  18
  19 #include "frontends/alert.h"
  20 #include "frontends/Application.h"
  21
  22 #include "support/convert.h"
  23 #include "support/debug.h"
  24 #include "support/filetools.h"
  25 #include "support/gettext.h"
  26 #include "support/lstrings.h"
  27 #include "support/Path.h"
  28 #include "support/Systemcall.h"
  29 #include "support/regex.h"
  30
  31 #include <fstream>
  32
  33 using namespace std;
  34 using namespace lyx::support;
  35
  36
  37
  38 namespace lyx {
  39
  40
  41 int VCS::doVCCommandCall(string const & cmd, FileName const & path)
  42 {
  43         LYXERR(Debug::LYXVC, "doVCCommandCall: " << cmd);
  44         Systemcall one;
  45         support::PathChanger p(path);
  46         return one.startscript(Systemcall::Wait, cmd, false);
  47 }
  48
  49
  50 int VCS::doVCCommand(string const & cmd, FileName const & path, bool reportError)
  51 {
  52         if (owner_)
  53                 owner_->setBusy(true);
  54
  55         int const ret = doVCCommandCall(cmd, path);
  56
  57         if (owner_)
  58                 owner_->setBusy(false);
  59         if (ret && reportError)
  60                 frontend::Alert::error(_("Revision control error."),
  61                         bformat(_("Some problem occured while running the command:\n"
  62                                   "'%1$s'."),
  63                         from_utf8(cmd)));
  64         return ret;
  65 }
  66
  67
  68 /////////////////////////////////////////////////////////////////////
  69 //
  70 // RCS
  71 //
  72 /////////////////////////////////////////////////////////////////////
  73
  74 RCS::RCS(FileName const & m)
  75 {
  76         master_ = m;
  77         scanMaster();
  78 }
  79
  80
  81 FileName const RCS::findFile(FileName const & file)
  82 {
  83         // Check if *,v exists.
  84         FileName tmp(file.absFileName() + ",v");
  85         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under rcs: " << tmp);
  86         if (tmp.isReadableFile()) {
  87                 LYXERR(Debug::LYXVC, "Yes, " << file << " is under rcs.");
  88                 return tmp;
  89         }
  90
  91         // Check if RCS/*,v exists.
  92         tmp = FileName(addName(addPath(onlyPath(file.absFileName()), "RCS"), file.absFileName()) + ",v");
  93         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under rcs: " << tmp);
  94         if (tmp.isReadableFile()) {
  95                 LYXERR(Debug::LYXVC, "Yes, " << file << " is under rcs.");
  96                 return tmp;
  97         }
  98
  99         return FileName();
 100 }
 101
 102
 103 void RCS::retrieve(FileName const & file)
 104 {
 105         LYXERR(Debug::LYXVC, "LyXVC::RCS: retrieve.\n\t" << file);
 106         doVCCommandCall("co -q -r " + quoteName(file.toFilesystemEncoding()),
 107                          FileName());
 108 }
 109
 110
 111 void RCS::scanMaster()
 112 {
 113         if (master_.empty())
 114                 return;
 115
 116         LYXERR(Debug::LYXVC, "LyXVC::RCS: scanMaster: " << master_);
 117
 118         ifstream ifs(master_.toFilesystemEncoding().c_str());
 119
 120         string token;
 121         bool read_enough = false;
 122
 123         while (!read_enough && ifs >> token) {
 124                 LYXERR(Debug::LYXVC, "LyXVC::scanMaster: current lex text: `"
 125                         << token << '\'');
 126
 127                 if (token.empty())
 128                         continue;
 129                 else if (token == "head") {
 130                         // get version here
 131                         string tmv;
 132                         ifs >> tmv;
 133                         tmv = rtrim(tmv, ";");
 134                         version_ = tmv;
 135                         LYXERR(Debug::LYXVC, "LyXVC: version found to be " << tmv);
 136                 } else if (contains(token, "access")
 137                            || contains(token, "symbols")
 138                            || contains(token, "strict")) {
 139                         // nothing
 140                 } else if (contains(token, "locks")) {
 141                         // get locker here
 142                         if (contains(token, ';')) {
 143                                 locker_ = "Unlocked";
 144                                 vcstatus = UNLOCKED;
 145                                 continue;
 146                         }
 147                         string tmpt;
 148                         string s1;
 149                         string s2;
 150                         do {
 151                                 ifs >> tmpt;
 152                                 s1 = rtrim(tmpt, ";");
 153                                 // tmp is now in the format <user>:<version>
 154                                 s1 = split(s1, s2, ':');
 155                                 // s2 is user, and s1 is version
 156                                 if (s1 == version_) {
 157                                         locker_ = s2;
 158                                         vcstatus = LOCKED;
 159                                         break;
 160                                 }
 161                         } while (!contains(tmpt, ';'));
 162
 163                 } else if (token == "comment") {
 164                         // we don't need to read any further than this.
 165                         read_enough = true;
 166                 } else {
 167                         // unexpected
 168                         LYXERR(Debug::LYXVC, "LyXVC::scanMaster(): unexpected token");
 169                 }
 170         }
 171 }
 172
 173
 174 void RCS::registrer(string const & msg)
 175 {
 176         string cmd = "ci -q -u -i -t-\"";
 177         cmd += msg;
 178         cmd += "\" ";
 179         cmd += quoteName(onlyFileName(owner_->absFileName()));
 180         doVCCommand(cmd, FileName(owner_->filePath()));
 181 }
 182
 183
 184 string RCS::checkIn(string const & msg)
 185 {
 186         int ret = doVCCommand("ci -q -u -m\"" + msg + "\" "
 187                     + quoteName(onlyFileName(owner_->absFileName())),
 188                     FileName(owner_->filePath()));
 189         return ret ? string() : "RCS: Proceeded";
 190 }
 191
 192
 193 bool RCS::checkInEnabled()
 194 {
 195         return owner_ && !owner_->isReadonly();
 196 }
 197
 198
 199 bool RCS::isCheckInWithConfirmation()
 200 {
 201         // FIXME one day common getDiff for all backends
 202         // docstring diff;
 203         // if (getDiff(file, diff) && diff.empty())
 204         //      return false;
 205
 206         FileName tmpf = FileName::tempName("lyxvcout");
 207         if (tmpf.empty()) {
 208                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 209                 return true;
 210         }
 211
 212         doVCCommandCall("rcsdiff " + quoteName(owner_->absFileName())
 213                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
 214                 FileName(owner_->filePath()));
 215
 216         docstring diff = tmpf.fileContents("UTF-8");
 217         tmpf.erase();
 218
 219         if (diff.empty())
 220                 return false;
 221
 222         return true;
 223 }
 224
 225
 226 string RCS::checkOut()
 227 {
 228         owner_->markClean();
 229         int ret = doVCCommand("co -q -l " + quoteName(onlyFileName(owner_->absFileName())),
 230                     FileName(owner_->filePath()));
 231         return ret ? string() : "RCS: Proceeded";
 232 }
 233
 234
 235 bool RCS::checkOutEnabled()
 236 {
 237         return owner_ && owner_->isReadonly();
 238 }
 239
 240
 241 string RCS::repoUpdate()
 242 {
 243         lyxerr << "Sorry, not implemented." << endl;
 244         return string();
 245 }
 246
 247
 248 bool RCS::repoUpdateEnabled()
 249 {
 250         return false;
 251 }
 252
 253
 254 string RCS::lockingToggle()
 255 {
 256         //FIXME this might be actually possible, study rcs -U, rcs -L.
 257         //State should be easy to get inside scanMaster.
 258         //It would fix #4370 and make rcs/svn usage even more closer.
 259         lyxerr << "Sorry, not implemented." << endl;
 260         return string();
 261 }
 262
 263
 264 bool RCS::lockingToggleEnabled()
 265 {
 266         return false;
 267 }
 268
 269
 270 bool RCS::revert()
 271 {
 272         if (doVCCommand("co -f -u" + version_ + " "
 273                     + quoteName(onlyFileName(owner_->absFileName())),
 274                     FileName(owner_->filePath())))
 275                 return false;
 276         // We ignore changes and just reload!
 277         owner_->markClean();
 278         return true;
 279 }
 280
 281
 282 bool RCS::isRevertWithConfirmation()
 283 {
 284         //FIXME owner && diff ?
 285         return true;
 286 }
 287
 288
 289 void RCS::undoLast()
 290 {
 291         LYXERR(Debug::LYXVC, "LyXVC: undoLast");
 292         doVCCommand("rcs -o" + version_ + " "
 293                     + quoteName(onlyFileName(owner_->absFileName())),
 294                     FileName(owner_->filePath()));
 295 }
 296
 297
 298 bool RCS::undoLastEnabled()
 299 {
 300         return true;
 301 }
 302
 303
 304 void RCS::getLog(FileName const & tmpf)
 305 {
 306         doVCCommand("rlog " + quoteName(onlyFileName(owner_->absFileName()))
 307                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
 308                     FileName(owner_->filePath()));
 309 }
 310
 311
 312 bool RCS::toggleReadOnlyEnabled()
 313 {
 314         // This got broken somewhere along lfuns dispatch reorganization.
 315         // reloadBuffer would be needed after this, but thats problematic
 316         // since we are inside Buffer::dispatch.
 317         // return true;
 318         return false;
 319 }
 320
 321 string RCS::revisionInfo(LyXVC::RevisionInfo const info)
 322 {
 323         if (info == LyXVC::File)
 324                 return version_;
 325         return string();
 326 }
 327
 328
 329 bool RCS::prepareFileRevision(string const &revis, string & f)
 330 {
 331         string rev = revis;
 332
 333         if (isStrInt(rev)) {
 334                 int back = convert<int>(rev);
 335                 // if positive use as the last number in the whole revision string
 336                 if (back > 0) {
 337                         string base;
 338                         rsplit(version_, base , '.' );
 339                         rev = base + "." + rev;
 340                 }
 341                 if (back == 0)
 342                         rev = version_;
 343                 // we care about the last number from revision string
 344                 // in case of backward indexing
 345                 if (back < 0) {
 346                         string cur, base;
 347                         cur = rsplit(version_, base , '.' );
 348                         if (!isStrInt(cur))
 349                                 return false;
 350                         int want = convert<int>(cur) + back;
 351                         if (want <= 0)
 352                                 return false;
 353
 354                         rev = base + "." + convert<string>(want);
 355                 }
 356         }
 357
 358         FileName tmpf = FileName::tempName("lyxvcrev_" + rev + "_");
 359         if (tmpf.empty()) {
 360                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 361                 return N_("Error: Could not generate logfile.");
 362         }
 363
 364         doVCCommand("co -p" + rev + " "
 365                       + quoteName(onlyFileName(owner_->absFileName()))
 366                       + " > " + quoteName(tmpf.toFilesystemEncoding()),
 367                 FileName(owner_->filePath()));
 368         if (tmpf.isFileEmpty())
 369                 return false;
 370
 371         f = tmpf.absFileName();
 372         return true;
 373 }
 374
 375
 376 bool RCS::prepareFileRevisionEnabled()
 377 {
 378         return true;
 379 }
 380
 381
 382 /////////////////////////////////////////////////////////////////////
 383 //
 384 // CVS
 385 //
 386 /////////////////////////////////////////////////////////////////////
 387
 388 CVS::CVS(FileName const & m, FileName const & f)
 389 {
 390         master_ = m;
 391         file_ = f;
 392         have_rev_info_ = false;
 393         scanMaster();
 394 }
 395
 396
 397 FileName const CVS::findFile(FileName const & file)
 398 {
 399         // First we look for the CVS/Entries in the same dir
 400         // where we have file.
 401         FileName const entries(onlyPath(file.absFileName()) + "/CVS/Entries");
 402         string const tmpf = '/' + onlyFileName(file.absFileName()) + '/';
 403         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under cvs in `" << entries
 404                              << "' for `" << tmpf << '\'');
 405         if (entries.isReadableFile()) {
 406                 // Ok we are at least in a CVS dir. Parse the CVS/Entries
 407                 // and see if we can find this file. We do a fast and
 408                 // dirty parse here.
 409                 ifstream ifs(entries.toFilesystemEncoding().c_str());
 410                 string line;
 411                 while (getline(ifs, line)) {
 412                         LYXERR(Debug::LYXVC, "\tEntries: " << line);
 413                         if (contains(line, tmpf))
 414                                 return entries;
 415                 }
 416         }
 417         return FileName();
 418 }
 419
 420
 421 void CVS::scanMaster()
 422 {
 423         LYXERR(Debug::LYXVC, "LyXVC::CVS: scanMaster. \n     Checking: " << master_);
 424         // Ok now we do the real scan...
 425         ifstream ifs(master_.toFilesystemEncoding().c_str());
 426         string name = onlyFileName(file_.absFileName());
 427         string tmpf = '/' + name + '/';
 428         LYXERR(Debug::LYXVC, "\tlooking for `" << tmpf << '\'');
 429         string line;
 430         static regex const reg("/(.*)/(.*)/(.*)/(.*)/(.*)");
 431         while (getline(ifs, line)) {
 432                 LYXERR(Debug::LYXVC, "\t  line: " << line);
 433                 if (contains(line, tmpf)) {
 434                         // Ok extract the fields.
 435                         smatch sm;
 436
 437                         regex_match(line, sm, reg);
 438
 439                         //sm[0]; // whole matched string
 440                         //sm[1]; // filename
 441                         version_ = sm.str(2);
 442                         string const file_date = sm.str(3);
 443
 444                         //sm[4]; // options
 445                         //sm[5]; // tag or tagdate
 446                         if (file_.isReadableFile()) {
 447                                 time_t mod = file_.lastModified();
 448                                 string mod_date = rtrim(asctime(gmtime(&mod)), "\n");
 449                                 LYXERR(Debug::LYXVC, "Date in Entries: `" << file_date
 450                                         << "'\nModification date of file: `" << mod_date << '\'');
 451                                 if (file_.isReadOnly()) {
 452                                         // readonly checkout is unlocked
 453                                         vcstatus = UNLOCKED;
 454                                 } else {
 455                                         FileName bdir(addPath(master_.onlyPath().absFileName(),"Base"));
 456                                         FileName base(addName(bdir.absFileName(),name));
 457                                         // if base version is existent "cvs edit" was used to lock
 458                                         vcstatus = base.isReadableFile() ? LOCKED : NOLOCKING;
 459                                 }
 460                         } else {
 461                                 vcstatus = NOLOCKING;
 462                         }
 463                         break;
 464                 }
 465         }
 466 }
 467
 468
 469 string const CVS::getTarget(OperationMode opmode) const
 470 {
 471         switch(opmode) {
 472         case Directory:
 473                 // in client server mode CVS does not like full path operand for directory operation
 474                 // since LyX switches to the repo dir "." is good enough as target
 475                 return ".";
 476         case File:
 477                 return quoteName(onlyFileName(owner_->absFileName()));
 478         }
 479         return string();
 480 }
 481
 482
 483 docstring CVS::toString(CvsStatus status) const
 484 {
 485         switch (status) {
 486         case UpToDate:
 487                 return _("Up-to-date");
 488         case LocallyModified:
 489                 return _("Locally Modified");
 490         case LocallyAdded:
 491                 return _("Locally Added");
 492         case NeedsMerge:
 493                 return _("Needs Merge");
 494         case NeedsCheckout:
 495                 return _("Needs Checkout");
 496         case NoCvsFile:
 497                 return _("No CVS file");
 498         case StatusError:
 499                 return _("Cannot retrieve CVS status");
 500         }
 501         return 0;
 502 }
 503
 504
 505 int CVS::doVCCommandWithOutput(string const & cmd, FileName const & path,
 506         FileName const & output, bool reportError)
 507 {
 508         string redirection = output.empty() ? "" : " > " + quoteName(output.toFilesystemEncoding());
 509         return doVCCommand(cmd + redirection, path, reportError);
 510 }
 511
 512
 513 int CVS::doVCCommandCallWithOutput(std::string const & cmd,
 514         support::FileName const & path,
 515         support::FileName const & output)
 516 {
 517         string redirection = output.empty() ? "" : " > " + quoteName(output.toFilesystemEncoding());
 518         return doVCCommandCall(cmd + redirection, path);
 519 }
 520
 521
 522 CVS::CvsStatus CVS::getStatus()
 523 {
 524         FileName tmpf = FileName::tempName("lyxvcout");
 525         if (tmpf.empty()) {
 526                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 527                 return StatusError;
 528         }
 529
 530         if (doVCCommandCallWithOutput("cvs status " + getTarget(File),
 531                 FileName(owner_->filePath()), tmpf)) {
 532                 tmpf.removeFile();
 533                 return StatusError;
 534         }
 535
 536         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
 537         CvsStatus status = NoCvsFile;
 538
 539         while (ifs) {
 540                 string line;
 541                 getline(ifs, line);
 542                 LYXERR(Debug::LYXVC, line << "\n");
 543                 if (prefixIs(line, "File:")) {
 544                         if (contains(line, "Up-to-date"))
 545                                 status = UpToDate;
 546                         else if (contains(line, "Locally Modified"))
 547                                 status = LocallyModified;
 548                         else if (contains(line, "Locally Added"))
 549                                 status = LocallyAdded;
 550                         else if (contains(line, "Needs Merge"))
 551                                 status = NeedsMerge;
 552                         else if (contains(line, "Needs Checkout"))
 553                                 status = NeedsCheckout;
 554                 }
 555         }
 556         tmpf.removeFile();
 557         return status;
 558 }
 559
 560 void CVS::getRevisionInfo()
 561 {
 562         if (have_rev_info_)
 563                 return;
 564         have_rev_info_ = true;
 565         FileName tmpf = FileName::tempName("lyxvcout");
 566         if (tmpf.empty()) {
 567                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 568                 return;
 569         }
 570
 571         int rc = doVCCommandCallWithOutput("cvs log -r" + version_
 572                 + " " + getTarget(File),
 573                 FileName(owner_->filePath()), tmpf);
 574         if (rc) {
 575                 tmpf.removeFile();
 576                 LYXERR(Debug::LYXVC, "cvs log failed with exit code " << rc);
 577                 return;
 578         }
 579
 580         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
 581         static regex const reg("date: (.*) (.*) (.*);  author: (.*);  state: (.*);(.*)");
 582
 583         while (ifs) {
 584                 string line;
 585                 getline(ifs, line);
 586                 LYXERR(Debug::LYXVC, line << "\n");
 587                 if (prefixIs(line, "date:")) {
 588                         smatch sm;
 589                         regex_match(line, sm, reg);
 590                         //sm[0]; // whole matched string
 591                         rev_date_cache_ = sm[1];
 592                         rev_time_cache_ = sm[2];
 593                         //sm[3]; // GMT offset
 594                         rev_author_cache_ = sm[4];
 595                         break;
 596                 }
 597         }
 598         tmpf.removeFile();
 599         if (rev_author_cache_.empty())
 600                 LYXERR(Debug::LYXVC,
 601                    "Could not retrieve revision info for " << version_ <<
 602                    " of " << getTarget(File));
 603 }
 604
 605
 606 void CVS::registrer(string const & msg)
 607 {
 608         doVCCommand("cvs -q add -m \"" + msg + "\" "
 609                 + getTarget(File),
 610                 FileName(owner_->filePath()));
 611 }
 612
 613
 614 void CVS::getDiff(OperationMode opmode, FileName const & tmpf)
 615 {
 616         doVCCommandWithOutput("cvs diff " + getTarget(opmode),
 617                 FileName(owner_->filePath()), tmpf, false);
 618 }
 619
 620
 621 int CVS::edit()
 622 {
 623         vcstatus = LOCKED;
 624         return doVCCommand("cvs -q edit " + getTarget(File),
 625                 FileName(owner_->filePath()));
 626 }
 627
 628
 629 int CVS::unedit()
 630 {
 631         vcstatus = UNLOCKED;
 632         return doVCCommand("cvs -q unedit " + getTarget(File),
 633                 FileName(owner_->filePath()));
 634 }
 635
 636
 637 int CVS::update(OperationMode opmode, FileName const & tmpf)
 638 {
 639         return doVCCommandWithOutput("cvs -q update "
 640                 + getTarget(opmode),
 641                 FileName(owner_->filePath()), tmpf, false);
 642 }
 643
 644
 645 string CVS::scanLogFile(FileName const & f, string & status)
 646 {
 647         ifstream ifs(f.toFilesystemEncoding().c_str());
 648
 649         while (ifs) {
 650                 string line;
 651                 getline(ifs, line);
 652                 LYXERR(Debug::LYXVC, line << "\n");
 653                 if (!line.empty())
 654                         status += line + "; ";
 655                 if (prefixIs(line, "C ")) {
 656                         ifs.close();
 657                         return line;
 658                 }
 659         }
 660         ifs.close();
 661         return string();
 662 }
 663
 664
 665 string CVS::checkIn(string const & msg)
 666 {
 667         CvsStatus status = getStatus();
 668         switch (status) {
 669         case UpToDate:
 670                 if (vcstatus != NOLOCKING)
 671                         unedit();
 672                 return "CVS: Proceeded";
 673         case LocallyModified:
 674         case LocallyAdded: {
 675                 int rc = doVCCommand("cvs -q commit -m \"" + msg + "\" "
 676                         + getTarget(File),
 677                     FileName(owner_->filePath()));
 678                 return rc ? string() : "CVS: Proceeded";
 679         }
 680         case NeedsMerge:
 681         case NeedsCheckout:
 682                 frontend::Alert::error(_("Revision control error."),
 683                         _("The repository version is newer then the current check out.\n"
 684                           "You have to update from repository first or revert your changes.")) ;
 685                 break;
 686         default:
 687                 frontend::Alert::error(_("Revision control error."),
 688                         bformat(_("Bad status when checking in changes.\n"
 689                                           "\n'%1$s'\n\n"),
 690                                 toString(status)));
 691                 break;
 692         }
 693         return string();
 694 }
 695
 696
 697 bool CVS::isLocked() const
 698 {
 699         FileName fn(owner_->absFileName());
 700         fn.refresh();
 701         return !fn.isReadOnly();
 702 }
 703
 704
 705 bool CVS::checkInEnabled()
 706 {
 707         if (vcstatus != NOLOCKING)
 708                 return isLocked();
 709         else
 710                 return true;
 711 }
 712
 713
 714 bool CVS::isCheckInWithConfirmation()
 715 {
 716         CvsStatus status = getStatus();
 717         return status == LocallyModified || status == LocallyAdded;
 718 }
 719
 720
 721 string CVS::checkOut()
 722 {
 723         if (vcstatus != NOLOCKING && edit())
 724                 return string();
 725         FileName tmpf = FileName::tempName("lyxvcout");
 726         if (tmpf.empty()) {
 727                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 728                 return string();
 729         }
 730
 731         int rc = update(File, tmpf);
 732         string log;
 733         string const res = scanLogFile(tmpf, log);
 734         if (!res.empty()) {
 735                 frontend::Alert::error(_("Revision control error."),
 736                         bformat(_("Error when updating from repository.\n"
 737                                 "You have to manually resolve the conflicts NOW!\n'%1$s'.\n\n"
 738                                 "After pressing OK, LyX will try to reopen the resolved document."),
 739                                 from_local8bit(res)));
 740                 rc = 0;
 741         }
 742
 743         tmpf.erase();
 744         return rc ? string() : log.empty() ? "CVS: Proceeded" : "CVS: " + log;
 745 }
 746
 747
 748 bool CVS::checkOutEnabled()
 749 {
 750         if (vcstatus != NOLOCKING)
 751                 return !isLocked();
 752         else
 753                 return true;
 754 }
 755
 756
 757 string CVS::repoUpdate()
 758 {
 759         FileName tmpf = FileName::tempName("lyxvcout");
 760         if (tmpf.empty()) {
 761                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 762                 return string();
 763         }
 764
 765         getDiff(Directory, tmpf);
 766         docstring res = tmpf.fileContents("UTF-8");
 767         if (!res.empty()) {
 768                 LYXERR(Debug::LYXVC, "Diff detected:\n" << res);
 769                 docstring const file = from_utf8(owner_->filePath());
 770                 docstring text = bformat(_("There were detected changes "
 771                                 "in the working directory:\n%1$s\n\n"
 772                                 "In case of file conflict you have to resolve them "
 773                                 "manually or revert to repository version later."), file);
 774                 int ret = frontend::Alert::prompt(_("Changes detected"),
 775                                 text, 0, 1, _("&Continue"), _("&Abort"), _("View &Log ..."));
 776                 if (ret == 2 ) {
 777                         dispatch(FuncRequest(LFUN_DIALOG_SHOW, "file " + tmpf.absFileName()));
 778                         ret = frontend::Alert::prompt(_("Changes detected"),
 779                                 text, 0, 1, _("&Continue"), _("&Abort"));
 780                         hideDialogs("file", 0);
 781                 }
 782                 if (ret == 1 ) {
 783                         tmpf.removeFile();
 784                         return string();
 785                 }
 786         }
 787
 788         int rc = update(Directory, tmpf);
 789         res += "Update log:\n" + tmpf.fileContents("UTF-8");
 790         LYXERR(Debug::LYXVC, res);
 791
 792         string log;
 793         string sres = scanLogFile(tmpf, log);
 794         if (!sres.empty()) {
 795                 docstring const file = owner_->fileName().displayName(20);
 796                 frontend::Alert::error(_("Revision control error."),
 797                         bformat(_("Error when updating document %1$s from repository.\n"
 798                                           "You have to manually resolve the conflicts NOW!\n'%2$s'.\n\n"
 799                                           "After pressing OK, LyX will try to reopen the resolved document."),
 800                                 file, from_local8bit(sres)));
 801                 rc = 0;
 802         }
 803
 804         tmpf.removeFile();
 805
 806         return rc ? string() : log.empty() ? "CVS: Proceeded" : "CVS: " + log;
 807 }
 808
 809
 810 bool CVS::repoUpdateEnabled()
 811 {
 812         return true;
 813 }
 814
 815
 816 string CVS::lockingToggle()
 817 {
 818         lyxerr << "Sorry, not implemented." << endl;
 819         return string();
 820 }
 821
 822
 823 bool CVS::lockingToggleEnabled()
 824 {
 825         return false;
 826 }
 827
 828
 829 bool CVS::isRevertWithConfirmation()
 830 {
 831         CvsStatus status = getStatus();
 832         return !owner_->isClean() || status == LocallyModified || status == NeedsMerge;
 833 }
 834
 835
 836 bool CVS::revert()
 837 {
 838         // Reverts to the version in CVS repository and
 839         // gets the updated version from the repository.
 840         CvsStatus status = getStatus();
 841         switch (status) {
 842         case UpToDate:
 843                 if (vcstatus != NOLOCKING)
 844                         return 0 == unedit();
 845                 break;
 846         case NeedsMerge:
 847         case NeedsCheckout:
 848         case LocallyModified: {
 849                 FileName f(owner_->absFileName());
 850                 f.removeFile();
 851                 update(File, FileName());
 852                 owner_->markClean();
 853                 break;
 854         }
 855         case LocallyAdded: {
 856                 docstring const file = owner_->fileName().displayName(20);
 857                 frontend::Alert::error(_("Revision control error."),
 858                         bformat(_("The document %1$s is not in repository.\n"
 859                                   "You have to check in the first revision before you can revert."),
 860                                 file)) ;
 861                 return false;
 862         }
 863         default: {
 864                 docstring const file = owner_->fileName().displayName(20);
 865                 frontend::Alert::error(_("Revision control error."),
 866                         bformat(_("Cannot revert document %1$s to repository version.\n"
 867                                   "The status '%2$s' is unexpected."),
 868                                 file, toString(status)));
 869                 return false;
 870                 }
 871         }
 872         return true;
 873 }
 874
 875
 876 void CVS::undoLast()
 877 {
 878         // merge the current with the previous version
 879         // in a reverse patch kind of way, so that the
 880         // result is to revert the last changes.
 881         lyxerr << "Sorry, not implemented." << endl;
 882 }
 883
 884
 885 bool CVS::undoLastEnabled()
 886 {
 887         return false;
 888 }
 889
 890
 891 void CVS::getLog(FileName const & tmpf)
 892 {
 893         doVCCommandWithOutput("cvs log " + getTarget(File),
 894                 FileName(owner_->filePath()),
 895                 tmpf);
 896 }
 897
 898
 899 bool CVS::toggleReadOnlyEnabled()
 900 {
 901         return false;
 902 }
 903
 904
 905 string CVS::revisionInfo(LyXVC::RevisionInfo const info)
 906 {
 907         if (!version_.empty()) {
 908                 getRevisionInfo();
 909                 switch (info) {
 910                 case LyXVC::File:
 911                         return version_;
 912                 case LyXVC::Author:
 913                         return rev_author_cache_;
 914                 case LyXVC::Date:
 915                         return rev_date_cache_;
 916                 case LyXVC::Time:
 917                         return rev_time_cache_;
 918                 default: ;
 919                 }
 920         }
 921         return string();
 922 }
 923
 924
 925 bool CVS::prepareFileRevision(string const &, string &)
 926 {
 927         return false;
 928 }
 929
 930
 931 bool CVS::prepareFileRevisionEnabled()
 932 {
 933         return false;
 934 }
 935
 936
 937 /////////////////////////////////////////////////////////////////////
 938 //
 939 // SVN
 940 //
 941 /////////////////////////////////////////////////////////////////////
 942
 943 SVN::SVN(FileName const & m, FileName const & f)
 944 {
 945         owner_ = 0;
 946         master_ = m;
 947         file_ = f;
 948         locked_mode_ = 0;
 949         scanMaster();
 950 }
 951
 952
 953 FileName const SVN::findFile(FileName const & file)
 954 {
 955         // First we look for the .svn/entries in the same dir
 956         // where we have file.
 957         FileName const entries(onlyPath(file.absFileName()) + "/.svn/entries");
 958         string const tmpf = onlyFileName(file.absFileName());
 959         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under svn in `" << entries
 960                              << "' for `" << tmpf << '\'');
 961         if (entries.isReadableFile()) {
 962                 // Ok we are at least in a SVN dir. Parse the .svn/entries
 963                 // and see if we can find this file. We do a fast and
 964                 // dirty parse here.
 965                 ifstream ifs(entries.toFilesystemEncoding().c_str());
 966                 string line, oldline;
 967                 while (getline(ifs, line)) {
 968                         if (line == "dir" || line == "file")
 969                                 LYXERR(Debug::LYXVC, "\tEntries: " << oldline);
 970                         if (oldline == tmpf && line == "file")
 971                                 return entries;
 972                         oldline = line;
 973                 }
 974         }
 975         return FileName();
 976 }
 977
 978
 979 void SVN::scanMaster()
 980 {
 981         // vcstatus code is somewhat superflous, until we want
 982         // to implement read-only toggle for svn.
 983         vcstatus = NOLOCKING;
 984         if (checkLockMode()) {
 985                 if (isLocked()) {
 986                         vcstatus = LOCKED;
 987                 } else {
 988                         vcstatus = UNLOCKED;
 989                 }
 990         }
 991 }
 992
 993
 994 bool SVN::checkLockMode()
 995 {
 996         FileName tmpf = FileName::tempName("lyxvcout");
 997         if (tmpf.empty()){
 998                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 999                 return N_("Error: Could not generate logfile.");
1000         }
1001
1002         LYXERR(Debug::LYXVC, "Detecting locking mode...");
1003         if (doVCCommandCall("svn proplist " + quoteName(file_.onlyFileName())
1004                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1005                     file_.onlyPath()))
1006                 return false;
1007
1008         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
1009         string line;
1010         bool ret = false;
1011
1012         while (ifs) {
1013                 getline(ifs, line);
1014                 LYXERR(Debug::LYXVC, line);
1015                 if (contains(line, "svn:needs-lock"))
1016                         ret = true;
1017         }
1018         LYXERR(Debug::LYXVC, "Locking enabled: " << ret);
1019         ifs.close();
1020         locked_mode_ = ret;
1021         return ret;
1022
1023 }
1024
1025
1026 bool SVN::isLocked() const
1027 {
1028         file_.refresh();
1029         return !file_.isReadOnly();
1030 }
1031
1032
1033 void SVN::registrer(string const & /*msg*/)
1034 {
1035         doVCCommand("svn add -q " + quoteName(onlyFileName(owner_->absFileName())),
1036                     FileName(owner_->filePath()));
1037 }
1038
1039
1040 string SVN::checkIn(string const & msg)
1041 {
1042         FileName tmpf = FileName::tempName("lyxvcout");
1043         if (tmpf.empty()){
1044                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1045                 return N_("Error: Could not generate logfile.");
1046         }
1047
1048         doVCCommand("svn commit -m \"" + msg + "\" "
1049                     + quoteName(onlyFileName(owner_->absFileName()))
1050                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1051                     FileName(owner_->filePath()));
1052
1053         string log;
1054         string res = scanLogFile(tmpf, log);
1055         if (!res.empty())
1056                 frontend::Alert::error(_("Revision control error."),
1057                                 _("Error when committing to repository.\n"
1058                                 "You have to manually resolve the problem.\n"
1059                                 "LyX will reopen the document after you press OK."));
1060         else
1061                 fileLock(false, tmpf, log);
1062
1063         tmpf.erase();
1064         return log.empty() ? string() : "SVN: " + log;
1065 }
1066
1067
1068 bool SVN::checkInEnabled()
1069 {
1070         if (locked_mode_)
1071                 return isLocked();
1072         else
1073                 return true;
1074 }
1075
1076
1077 bool SVN::isCheckInWithConfirmation()
1078 {
1079         // FIXME one day common getDiff and perhaps OpMode for all backends
1080
1081         FileName tmpf = FileName::tempName("lyxvcout");
1082         if (tmpf.empty()) {
1083                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1084                 return true;
1085         }
1086
1087         doVCCommandCall("svn diff " + quoteName(owner_->absFileName())
1088                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1089                 FileName(owner_->filePath()));
1090
1091         docstring diff = tmpf.fileContents("UTF-8");
1092         tmpf.erase();
1093
1094         if (diff.empty())
1095                 return false;
1096
1097         return true;
1098 }
1099
1100
1101 // FIXME Correctly return code should be checked instead of this.
1102 // This would need another solution than just plain startscript.
1103 // Hint from Andre': QProcess::readAllStandardError()...
1104 string SVN::scanLogFile(FileName const & f, string & status)
1105 {
1106         ifstream ifs(f.toFilesystemEncoding().c_str());
1107         string line;
1108
1109         while (ifs) {
1110                 getline(ifs, line);
1111                 LYXERR(Debug::LYXVC, line << "\n");
1112                 if (!line.empty())
1113                         status += line + "; ";
1114                 if (prefixIs(line, "C ") || prefixIs(line, "CU ")
1115                                          || contains(line, "Commit failed")) {
1116                         ifs.close();
1117                         return line;
1118                 }
1119                 if (contains(line, "svn:needs-lock")) {
1120                         ifs.close();
1121                         return line;
1122                 }
1123         }
1124         ifs.close();
1125         return string();
1126 }
1127
1128
1129 void SVN::fileLock(bool lock, FileName const & tmpf, string &status)
1130 {
1131         if (!locked_mode_ || (isLocked() == lock))
1132                 return;
1133
1134         string const arg = lock ? "lock " : "unlock ";
1135         doVCCommand("svn "+ arg + quoteName(onlyFileName(owner_->absFileName()))
1136                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1137                     FileName(owner_->filePath()));
1138
1139         // Lock error messages go unfortunately on stderr and are unreachible this way.
1140         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
1141         string line;
1142         while (ifs) {
1143                 getline(ifs, line);
1144                 if (!line.empty()) status += line + "; ";
1145         }
1146         ifs.close();
1147
1148         if (!isLocked() && lock)
1149                 frontend::Alert::error(_("Revision control error."),
1150                         _("Error while acquiring write lock.\n"
1151                         "Another user is most probably editing\n"
1152                         "the current document now!\n"
1153                         "Also check the access to the repository."));
1154         if (isLocked() && !lock)
1155                 frontend::Alert::error(_("Revision control error."),
1156                         _("Error while releasing write lock.\n"
1157                         "Check the access to the repository."));
1158 }
1159
1160
1161 string SVN::checkOut()
1162 {
1163         FileName tmpf = FileName::tempName("lyxvcout");
1164         if (tmpf.empty()) {
1165                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1166                 return N_("Error: Could not generate logfile.");
1167         }
1168
1169         doVCCommand("svn update --non-interactive " + quoteName(onlyFileName(owner_->absFileName()))
1170                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1171                     FileName(owner_->filePath()));
1172
1173         string log;
1174         string const res = scanLogFile(tmpf, log);
1175         if (!res.empty())
1176                 frontend::Alert::error(_("Revision control error."),
1177                         bformat(_("Error when updating from repository.\n"
1178                                 "You have to manually resolve the conflicts NOW!\n'%1$s'.\n\n"
1179                                 "After pressing OK, LyX will try to reopen the resolved document."),
1180                         from_local8bit(res)));
1181
1182         fileLock(true, tmpf, log);
1183
1184         tmpf.erase();
1185         return log.empty() ? string() : "SVN: " + log;
1186 }
1187
1188
1189 bool SVN::checkOutEnabled()
1190 {
1191         if (locked_mode_)
1192                 return !isLocked();
1193         else
1194                 return true;
1195 }
1196
1197
1198 string SVN::repoUpdate()
1199 {
1200         FileName tmpf = FileName::tempName("lyxvcout");
1201         if (tmpf.empty()) {
1202                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1203                 return N_("Error: Could not generate logfile.");
1204         }
1205
1206         doVCCommand("svn diff " + quoteName(owner_->filePath())
1207                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1208                 FileName(owner_->filePath()));
1209         docstring res = tmpf.fileContents("UTF-8");
1210         if (!res.empty()) {
1211                 LYXERR(Debug::LYXVC, "Diff detected:\n" << res);
1212                 docstring const file = from_utf8(owner_->filePath());
1213                 docstring text = bformat(_("There were detected changes "
1214                                 "in the working directory:\n%1$s\n\n"
1215                                 "In case of file conflict version of the local directory files "
1216                                 "will be preferred."
1217                                 "\n\nContinue?"), file);
1218                 int ret = frontend::Alert::prompt(_("Changes detected"),
1219                                 text, 0, 1, _("&Yes"), _("&No"), _("View &Log ..."));
1220                 if (ret == 2 ) {
1221                         dispatch(FuncRequest(LFUN_DIALOG_SHOW, "file " + tmpf.absFileName()));
1222                         ret = frontend::Alert::prompt(_("Changes detected"),
1223                                 text, 0, 1, _("&Yes"), _("&No"));
1224                         hideDialogs("file", 0);
1225                 }
1226                 if (ret == 1 ) {
1227                         tmpf.erase();
1228                         return string();
1229                 }
1230         }
1231
1232         // Reverting looks too harsh, see bug #6255.
1233         // doVCCommand("svn revert -R " + quoteName(owner_->filePath())
1234         // + " > " + quoteName(tmpf.toFilesystemEncoding()),
1235         // FileName(owner_->filePath()));
1236         // res = "Revert log:\n" + tmpf.fileContents("UTF-8");
1237         doVCCommand("svn update --accept mine-full " + quoteName(owner_->filePath())
1238                 + " > " + quoteName(tmpf.toFilesystemEncoding()),
1239                 FileName(owner_->filePath()));
1240         res += "Update log:\n" + tmpf.fileContents("UTF-8");
1241
1242         LYXERR(Debug::LYXVC, res);
1243         tmpf.erase();
1244         return to_utf8(res);
1245 }
1246
1247
1248 bool SVN::repoUpdateEnabled()
1249 {
1250         return true;
1251 }
1252
1253
1254 string SVN::lockingToggle()
1255 {
1256         FileName tmpf = FileName::tempName("lyxvcout");
1257         if (tmpf.empty()) {
1258                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1259                 return N_("Error: Could not generate logfile.");
1260         }
1261
1262         int ret = doVCCommand("svn proplist " + quoteName(onlyFileName(owner_->absFileName()))
1263                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1264                     FileName(owner_->filePath()));
1265         if (ret)
1266                 return string();
1267
1268         string log;
1269         string res = scanLogFile(tmpf, log);
1270         bool locking = contains(res, "svn:needs-lock");
1271         if (!locking)
1272                 ret = doVCCommand("svn propset svn:needs-lock ON "
1273                     + quoteName(onlyFileName(owner_->absFileName()))
1274                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1275                     FileName(owner_->filePath()));
1276         else
1277                 ret = doVCCommand("svn propdel svn:needs-lock "
1278                     + quoteName(onlyFileName(owner_->absFileName()))
1279                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1280                     FileName(owner_->filePath()));
1281         if (ret)
1282                 return string();
1283
1284         tmpf.erase();
1285         frontend::Alert::warning(_("VCN File Locking"),
1286                 (locking ? _("Locking property unset.") : _("Locking property set.")) + "\n"
1287                 + _("Do not forget to commit the locking property into the repository."),
1288                 true);
1289
1290         return string("SVN: ") +  N_("Locking property set.");
1291 }
1292
1293
1294 bool SVN::lockingToggleEnabled()
1295 {
1296         return true;
1297 }
1298
1299
1300 bool SVN::revert()
1301 {
1302         // Reverts to the version in SVN repository and
1303         // gets the updated version from the repository.
1304         string const fil = quoteName(onlyFileName(owner_->absFileName()));
1305
1306         if (doVCCommand("svn revert -q " + fil,
1307                     FileName(owner_->filePath())))
1308                 return false;
1309         owner_->markClean();
1310         return true;
1311 }
1312
1313
1314 bool SVN::isRevertWithConfirmation()
1315 {
1316         //FIXME owner && diff
1317         return true;
1318 }
1319
1320
1321 void SVN::undoLast()
1322 {
1323         // merge the current with the previous version
1324         // in a reverse patch kind of way, so that the
1325         // result is to revert the last changes.
1326         lyxerr << "Sorry, not implemented." << endl;
1327 }
1328
1329
1330 bool SVN::undoLastEnabled()
1331 {
1332         return false;
1333 }
1334
1335
1336 string SVN::revisionInfo(LyXVC::RevisionInfo const info)
1337 {
1338         if (info == LyXVC::Tree) {
1339                         if (rev_tree_cache_.empty())
1340                                 if (!getTreeRevisionInfo())
1341                                         rev_tree_cache_ = "?";
1342                         if (rev_tree_cache_ == "?")
1343                                 return string();
1344
1345                         return rev_tree_cache_;
1346         }
1347
1348         // fill the rest of the attributes for a single file
1349         if (rev_file_cache_.empty())
1350                 if (!getFileRevisionInfo())
1351                         rev_file_cache_ = "?";
1352
1353         switch (info) {
1354                 case LyXVC::File:
1355                         if (rev_file_cache_ == "?")
1356                                 return string();
1357                         return rev_file_cache_;
1358                 case LyXVC::Author:
1359                         return rev_author_cache_;
1360                 case LyXVC::Date:
1361                         return rev_date_cache_;
1362                 case LyXVC::Time:
1363                         return rev_time_cache_;
1364                 default: ;
1365
1366         }
1367
1368         return string();
1369 }
1370
1371
1372 bool SVN::getFileRevisionInfo()
1373 {
1374         FileName tmpf = FileName::tempName("lyxvcout");
1375         if (tmpf.empty()) {
1376                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1377                 return N_("Error: Could not generate logfile.");
1378         }
1379
1380         doVCCommand("svn info --xml " + quoteName(onlyFileName(owner_->absFileName()))
1381                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1382                     FileName(owner_->filePath()));
1383
1384         if (tmpf.empty())
1385                 return false;
1386
1387         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
1388         string line;
1389         // commit log part
1390         bool c = false;
1391         string rev;
1392
1393         while (ifs) {
1394                 getline(ifs, line);
1395                 LYXERR(Debug::LYXVC, line);
1396                 if (prefixIs(line, "<commit"))
1397                         c = true;
1398                 if (c && prefixIs(line, "   revision=\"") && suffixIs(line, "\">")) {
1399                         string l1 = subst(line, "revision=\"", "");
1400                         string l2 = trim(subst(l1, "\">", ""));
1401                         if (isStrInt(l2))
1402                                 rev_file_cache_ = rev = l2;
1403                 }
1404                 if (c && prefixIs(line, "<author>") && suffixIs(line, "</author>")) {
1405                         string l1 = subst(line, "<author>", "");
1406                         string l2 = subst(l1, "</author>", "");
1407                         rev_author_cache_ = l2;
1408                 }
1409                 if (c && prefixIs(line, "<date>") && suffixIs(line, "</date>")) {
1410                         string l1 = subst(line, "<date>", "");
1411                         string l2 = subst(l1, "</date>", "");
1412                         l2 = split(l2, l1, 'T');
1413                         rev_date_cache_ = l1;
1414                         l2 = split(l2, l1, '.');
1415                         rev_time_cache_ = l1;
1416                 }
1417         }
1418
1419         ifs.close();
1420         tmpf.erase();
1421         return !rev.empty();
1422 }
1423
1424
1425 bool SVN::getTreeRevisionInfo()
1426 {
1427         FileName tmpf = FileName::tempName("lyxvcout");
1428         if (tmpf.empty()) {
1429                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1430                 return N_("Error: Could not generate logfile.");
1431         }
1432
1433         doVCCommand("svnversion -n . > " + quoteName(tmpf.toFilesystemEncoding()),
1434                     FileName(owner_->filePath()));
1435
1436         if (tmpf.empty())
1437                 return false;
1438
1439         // only first line in case something bad happens.
1440         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
1441         string line;
1442         getline(ifs, line);
1443         ifs.close();
1444         tmpf.erase();
1445
1446         rev_tree_cache_ = line;
1447         return !line.empty();
1448 }
1449
1450
1451 void SVN::getLog(FileName const & tmpf)
1452 {
1453         doVCCommand("svn log " + quoteName(onlyFileName(owner_->absFileName()))
1454                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1455                     FileName(owner_->filePath()));
1456 }
1457
1458
1459 bool SVN::prepareFileRevision(string const & revis, string & f)
1460 {
1461         if (!isStrInt(revis))
1462                 return false;
1463
1464         int rev = convert<int>(revis);
1465         if (rev <= 0)
1466                 if (!getFileRevisionInfo())
1467                         return false;
1468         if (rev == 0)
1469                 rev = convert<int>(rev_file_cache_);
1470         // go back for minus rev
1471         else if (rev < 0) {
1472                 rev = rev + convert<int>(rev_file_cache_);
1473                 if (rev < 1)
1474                         return false;
1475         }
1476
1477         string revname = convert<string>(rev);
1478         FileName tmpf = FileName::tempName("lyxvcrev_" + revname + "_");
1479         if (tmpf.empty()) {
1480                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1481                 return N_("Error: Could not generate logfile.");
1482         }
1483
1484         doVCCommand("svn cat -r " + revname + " "
1485                       + quoteName(onlyFileName(owner_->absFileName()))
1486                       + " > " + quoteName(tmpf.toFilesystemEncoding()),
1487                 FileName(owner_->filePath()));
1488         if (tmpf.isFileEmpty())
1489                 return false;
1490
1491         f = tmpf.absFileName();
1492         return true;
1493 }
1494
1495
1496 bool SVN::prepareFileRevisionEnabled()
1497 {
1498         return true;
1499 }
1500
1501
1502
1503 bool SVN::toggleReadOnlyEnabled()
1504 {
1505         return false;
1506 }
1507
1508
1509 } // namespace lyx