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 bool VCS::makeRCSRevision(string const &version, string &revis) const
  69 {
  70         string rev = revis;
  71
  72         if (isStrInt(rev)) {
  73                 int back = convert<int>(rev);
  74                 // if positive use as the last number in the whole revision string
  75                 if (back > 0) {
  76                         string base;
  77                         rsplit(version, base , '.' );
  78                         rev = base + "." + rev;
  79                 }
  80                 if (back == 0)
  81                         rev = version;
  82                 // we care about the last number from revision string
  83                 // in case of backward indexing
  84                 if (back < 0) {
  85                         string cur, base;
  86                         cur = rsplit(version, base , '.' );
  87                         if (!isStrInt(cur))
  88                                 return false;
  89                         int want = convert<int>(cur) + back;
  90                         if (want <= 0)
  91                                 return false;
  92
  93                         rev = base + "." + convert<string>(want);
  94                 }
  95         }
  96
  97         revis = rev;
  98         return true;
  99 }
 100
 101
 102 /////////////////////////////////////////////////////////////////////
 103 //
 104 // RCS
 105 //
 106 /////////////////////////////////////////////////////////////////////
 107
 108 RCS::RCS(FileName const & m)
 109 {
 110         master_ = m;
 111         scanMaster();
 112 }
 113
 114
 115 FileName const RCS::findFile(FileName const & file)
 116 {
 117         // Check if *,v exists.
 118         FileName tmp(file.absFileName() + ",v");
 119         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under rcs: " << tmp);
 120         if (tmp.isReadableFile()) {
 121                 LYXERR(Debug::LYXVC, "Yes, " << file << " is under rcs.");
 122                 return tmp;
 123         }
 124
 125         // Check if RCS/*,v exists.
 126         tmp = FileName(addName(addPath(onlyPath(file.absFileName()), "RCS"), file.absFileName()) + ",v");
 127         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under rcs: " << tmp);
 128         if (tmp.isReadableFile()) {
 129                 LYXERR(Debug::LYXVC, "Yes, " << file << " is under rcs.");
 130                 return tmp;
 131         }
 132
 133         return FileName();
 134 }
 135
 136
 137 void RCS::retrieve(FileName const & file)
 138 {
 139         LYXERR(Debug::LYXVC, "LyXVC::RCS: retrieve.\n\t" << file);
 140         doVCCommandCall("co -q -r " + quoteName(file.toFilesystemEncoding()),
 141                          FileName());
 142 }
 143
 144
 145 void RCS::scanMaster()
 146 {
 147         if (master_.empty())
 148                 return;
 149
 150         LYXERR(Debug::LYXVC, "LyXVC::RCS: scanMaster: " << master_);
 151
 152         ifstream ifs(master_.toFilesystemEncoding().c_str());
 153
 154         string token;
 155         bool read_enough = false;
 156
 157         while (!read_enough && ifs >> token) {
 158                 LYXERR(Debug::LYXVC, "LyXVC::scanMaster: current lex text: `"
 159                         << token << '\'');
 160
 161                 if (token.empty())
 162                         continue;
 163                 else if (token == "head") {
 164                         // get version here
 165                         string tmv;
 166                         ifs >> tmv;
 167                         tmv = rtrim(tmv, ";");
 168                         version_ = tmv;
 169                         LYXERR(Debug::LYXVC, "LyXVC: version found to be " << tmv);
 170                 } else if (contains(token, "access")
 171                            || contains(token, "symbols")
 172                            || contains(token, "strict")) {
 173                         // nothing
 174                 } else if (contains(token, "locks")) {
 175                         // get locker here
 176                         if (contains(token, ';')) {
 177                                 locker_ = "Unlocked";
 178                                 vcstatus = UNLOCKED;
 179                                 continue;
 180                         }
 181                         string tmpt;
 182                         string s1;
 183                         string s2;
 184                         do {
 185                                 ifs >> tmpt;
 186                                 s1 = rtrim(tmpt, ";");
 187                                 // tmp is now in the format <user>:<version>
 188                                 s1 = split(s1, s2, ':');
 189                                 // s2 is user, and s1 is version
 190                                 if (s1 == version_) {
 191                                         locker_ = s2;
 192                                         vcstatus = LOCKED;
 193                                         break;
 194                                 }
 195                         } while (!contains(tmpt, ';'));
 196
 197                 } else if (token == "comment") {
 198                         // we don't need to read any further than this.
 199                         read_enough = true;
 200                 } else {
 201                         // unexpected
 202                         LYXERR(Debug::LYXVC, "LyXVC::scanMaster(): unexpected token");
 203                 }
 204         }
 205 }
 206
 207
 208 void RCS::registrer(string const & msg)
 209 {
 210         string cmd = "ci -q -u -i -t-\"";
 211         cmd += msg;
 212         cmd += "\" ";
 213         cmd += quoteName(onlyFileName(owner_->absFileName()));
 214         doVCCommand(cmd, FileName(owner_->filePath()));
 215 }
 216
 217
 218 string RCS::checkIn(string const & msg)
 219 {
 220         int ret = doVCCommand("ci -q -u -m\"" + msg + "\" "
 221                     + quoteName(onlyFileName(owner_->absFileName())),
 222                     FileName(owner_->filePath()));
 223         return ret ? string() : "RCS: Proceeded";
 224 }
 225
 226
 227 bool RCS::checkInEnabled()
 228 {
 229         return owner_ && !owner_->isReadonly();
 230 }
 231
 232
 233 bool RCS::isCheckInWithConfirmation()
 234 {
 235         // FIXME one day common getDiff for all backends
 236         // docstring diff;
 237         // if (getDiff(file, diff) && diff.empty())
 238         //      return false;
 239
 240         FileName tmpf = FileName::tempName("lyxvcout");
 241         if (tmpf.empty()) {
 242                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 243                 return true;
 244         }
 245
 246         doVCCommandCall("rcsdiff " + quoteName(owner_->absFileName())
 247                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
 248                 FileName(owner_->filePath()));
 249
 250         docstring diff = tmpf.fileContents("UTF-8");
 251         tmpf.erase();
 252
 253         if (diff.empty())
 254                 return false;
 255
 256         return true;
 257 }
 258
 259
 260 string RCS::checkOut()
 261 {
 262         owner_->markClean();
 263         int ret = doVCCommand("co -q -l " + quoteName(onlyFileName(owner_->absFileName())),
 264                     FileName(owner_->filePath()));
 265         return ret ? string() : "RCS: Proceeded";
 266 }
 267
 268
 269 bool RCS::checkOutEnabled()
 270 {
 271         return owner_ && owner_->isReadonly();
 272 }
 273
 274
 275 string RCS::repoUpdate()
 276 {
 277         lyxerr << "Sorry, not implemented." << endl;
 278         return string();
 279 }
 280
 281
 282 bool RCS::repoUpdateEnabled()
 283 {
 284         return false;
 285 }
 286
 287
 288 string RCS::lockingToggle()
 289 {
 290         //FIXME this might be actually possible, study rcs -U, rcs -L.
 291         //State should be easy to get inside scanMaster.
 292         //It would fix #4370 and make rcs/svn usage even more closer.
 293         lyxerr << "Sorry, not implemented." << endl;
 294         return string();
 295 }
 296
 297
 298 bool RCS::lockingToggleEnabled()
 299 {
 300         return false;
 301 }
 302
 303
 304 bool RCS::revert()
 305 {
 306         if (doVCCommand("co -f -u" + version_ + " "
 307                     + quoteName(onlyFileName(owner_->absFileName())),
 308                     FileName(owner_->filePath())))
 309                 return false;
 310         // We ignore changes and just reload!
 311         owner_->markClean();
 312         return true;
 313 }
 314
 315
 316 bool RCS::isRevertWithConfirmation()
 317 {
 318         //FIXME owner && diff ?
 319         return true;
 320 }
 321
 322
 323 void RCS::undoLast()
 324 {
 325         LYXERR(Debug::LYXVC, "LyXVC: undoLast");
 326         doVCCommand("rcs -o" + version_ + " "
 327                     + quoteName(onlyFileName(owner_->absFileName())),
 328                     FileName(owner_->filePath()));
 329 }
 330
 331
 332 bool RCS::undoLastEnabled()
 333 {
 334         return true;
 335 }
 336
 337
 338 void RCS::getLog(FileName const & tmpf)
 339 {
 340         doVCCommand("rlog " + quoteName(onlyFileName(owner_->absFileName()))
 341                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
 342                     FileName(owner_->filePath()));
 343 }
 344
 345
 346 bool RCS::toggleReadOnlyEnabled()
 347 {
 348         // This got broken somewhere along lfuns dispatch reorganization.
 349         // reloadBuffer would be needed after this, but thats problematic
 350         // since we are inside Buffer::dispatch.
 351         // return true;
 352         return false;
 353 }
 354
 355 string RCS::revisionInfo(LyXVC::RevisionInfo const info)
 356 {
 357         if (info == LyXVC::File)
 358                 return version_;
 359         return string();
 360 }
 361
 362
 363 bool RCS::prepareFileRevision(string const &revis, string & f)
 364 {
 365         string rev = revis;
 366         if (!VCS::makeRCSRevision(version_, rev))
 367                 return false;
 368
 369         FileName tmpf = FileName::tempName("lyxvcrev_" + rev + "_");
 370         if (tmpf.empty()) {
 371                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 372                 return N_("Error: Could not generate logfile.");
 373         }
 374
 375         doVCCommand("co -p" + rev + " "
 376                       + quoteName(onlyFileName(owner_->absFileName()))
 377                       + " > " + quoteName(tmpf.toFilesystemEncoding()),
 378                 FileName(owner_->filePath()));
 379         if (tmpf.isFileEmpty())
 380                 return false;
 381
 382         f = tmpf.absFileName();
 383         return true;
 384 }
 385
 386
 387 bool RCS::prepareFileRevisionEnabled()
 388 {
 389         return true;
 390 }
 391
 392
 393 /////////////////////////////////////////////////////////////////////
 394 //
 395 // CVS
 396 //
 397 /////////////////////////////////////////////////////////////////////
 398
 399 CVS::CVS(FileName const & m, FileName const & f)
 400 {
 401         master_ = m;
 402         file_ = f;
 403         have_rev_info_ = false;
 404         scanMaster();
 405 }
 406
 407
 408 FileName const CVS::findFile(FileName const & file)
 409 {
 410         // First we look for the CVS/Entries in the same dir
 411         // where we have file.
 412         FileName const entries(onlyPath(file.absFileName()) + "/CVS/Entries");
 413         string const tmpf = '/' + onlyFileName(file.absFileName()) + '/';
 414         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under cvs in `" << entries
 415                              << "' for `" << tmpf << '\'');
 416         if (entries.isReadableFile()) {
 417                 // Ok we are at least in a CVS dir. Parse the CVS/Entries
 418                 // and see if we can find this file. We do a fast and
 419                 // dirty parse here.
 420                 ifstream ifs(entries.toFilesystemEncoding().c_str());
 421                 string line;
 422                 while (getline(ifs, line)) {
 423                         LYXERR(Debug::LYXVC, "\tEntries: " << line);
 424                         if (contains(line, tmpf))
 425                                 return entries;
 426                 }
 427         }
 428         return FileName();
 429 }
 430
 431
 432 void CVS::scanMaster()
 433 {
 434         LYXERR(Debug::LYXVC, "LyXVC::CVS: scanMaster. \n     Checking: " << master_);
 435         // Ok now we do the real scan...
 436         ifstream ifs(master_.toFilesystemEncoding().c_str());
 437         string name = onlyFileName(file_.absFileName());
 438         string tmpf = '/' + name + '/';
 439         LYXERR(Debug::LYXVC, "\tlooking for `" << tmpf << '\'');
 440         string line;
 441         static regex const reg("/(.*)/(.*)/(.*)/(.*)/(.*)");
 442         while (getline(ifs, line)) {
 443                 LYXERR(Debug::LYXVC, "\t  line: " << line);
 444                 if (contains(line, tmpf)) {
 445                         // Ok extract the fields.
 446                         smatch sm;
 447
 448                         regex_match(line, sm, reg);
 449
 450                         //sm[0]; // whole matched string
 451                         //sm[1]; // filename
 452                         version_ = sm.str(2);
 453                         string const file_date = sm.str(3);
 454
 455                         //sm[4]; // options
 456                         //sm[5]; // tag or tagdate
 457                         if (file_.isReadableFile()) {
 458                                 time_t mod = file_.lastModified();
 459                                 string mod_date = rtrim(asctime(gmtime(&mod)), "\n");
 460                                 LYXERR(Debug::LYXVC, "Date in Entries: `" << file_date
 461                                         << "'\nModification date of file: `" << mod_date << '\'');
 462                                 if (file_.isReadOnly()) {
 463                                         // readonly checkout is unlocked
 464                                         vcstatus = UNLOCKED;
 465                                 } else {
 466                                         FileName bdir(addPath(master_.onlyPath().absFileName(),"Base"));
 467                                         FileName base(addName(bdir.absFileName(),name));
 468                                         // if base version is existent "cvs edit" was used to lock
 469                                         vcstatus = base.isReadableFile() ? LOCKED : NOLOCKING;
 470                                 }
 471                         } else {
 472                                 vcstatus = NOLOCKING;
 473                         }
 474                         break;
 475                 }
 476         }
 477 }
 478
 479
 480 string const CVS::getTarget(OperationMode opmode) const
 481 {
 482         switch(opmode) {
 483         case Directory:
 484                 // in client server mode CVS does not like full path operand for directory operation
 485                 // since LyX switches to the repo dir "." is good enough as target
 486                 return ".";
 487         case File:
 488                 return quoteName(onlyFileName(owner_->absFileName()));
 489         }
 490         return string();
 491 }
 492
 493
 494 docstring CVS::toString(CvsStatus status) const
 495 {
 496         switch (status) {
 497         case UpToDate:
 498                 return _("Up-to-date");
 499         case LocallyModified:
 500                 return _("Locally Modified");
 501         case LocallyAdded:
 502                 return _("Locally Added");
 503         case NeedsMerge:
 504                 return _("Needs Merge");
 505         case NeedsCheckout:
 506                 return _("Needs Checkout");
 507         case NoCvsFile:
 508                 return _("No CVS file");
 509         case StatusError:
 510                 return _("Cannot retrieve CVS status");
 511         }
 512         return 0;
 513 }
 514
 515
 516 int CVS::doVCCommandWithOutput(string const & cmd, FileName const & path,
 517         FileName const & output, bool reportError)
 518 {
 519         string redirection = output.empty() ? "" : " > " + quoteName(output.toFilesystemEncoding());
 520         return doVCCommand(cmd + redirection, path, reportError);
 521 }
 522
 523
 524 int CVS::doVCCommandCallWithOutput(std::string const & cmd,
 525         support::FileName const & path,
 526         support::FileName const & output)
 527 {
 528         string redirection = output.empty() ? "" : " > " + quoteName(output.toFilesystemEncoding());
 529         return doVCCommandCall(cmd + redirection, path);
 530 }
 531
 532
 533 CVS::CvsStatus CVS::getStatus()
 534 {
 535         FileName tmpf = FileName::tempName("lyxvcout");
 536         if (tmpf.empty()) {
 537                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 538                 return StatusError;
 539         }
 540
 541         if (doVCCommandCallWithOutput("cvs status " + getTarget(File),
 542                 FileName(owner_->filePath()), tmpf)) {
 543                 tmpf.removeFile();
 544                 return StatusError;
 545         }
 546
 547         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
 548         CvsStatus status = NoCvsFile;
 549
 550         while (ifs) {
 551                 string line;
 552                 getline(ifs, line);
 553                 LYXERR(Debug::LYXVC, line << "\n");
 554                 if (prefixIs(line, "File:")) {
 555                         if (contains(line, "Up-to-date"))
 556                                 status = UpToDate;
 557                         else if (contains(line, "Locally Modified"))
 558                                 status = LocallyModified;
 559                         else if (contains(line, "Locally Added"))
 560                                 status = LocallyAdded;
 561                         else if (contains(line, "Needs Merge"))
 562                                 status = NeedsMerge;
 563                         else if (contains(line, "Needs Checkout"))
 564                                 status = NeedsCheckout;
 565                 }
 566         }
 567         tmpf.removeFile();
 568         return status;
 569 }
 570
 571 void CVS::getRevisionInfo()
 572 {
 573         if (have_rev_info_)
 574                 return;
 575         have_rev_info_ = true;
 576         FileName tmpf = FileName::tempName("lyxvcout");
 577         if (tmpf.empty()) {
 578                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 579                 return;
 580         }
 581
 582         int rc = doVCCommandCallWithOutput("cvs log -r" + version_
 583                 + " " + getTarget(File),
 584                 FileName(owner_->filePath()), tmpf);
 585         if (rc) {
 586                 tmpf.removeFile();
 587                 LYXERR(Debug::LYXVC, "cvs log failed with exit code " << rc);
 588                 return;
 589         }
 590
 591         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
 592         static regex const reg("date: (.*) (.*) (.*);  author: (.*);  state: (.*);(.*)");
 593
 594         while (ifs) {
 595                 string line;
 596                 getline(ifs, line);
 597                 LYXERR(Debug::LYXVC, line << "\n");
 598                 if (prefixIs(line, "date:")) {
 599                         smatch sm;
 600                         regex_match(line, sm, reg);
 601                         //sm[0]; // whole matched string
 602                         rev_date_cache_ = sm[1];
 603                         rev_time_cache_ = sm[2];
 604                         //sm[3]; // GMT offset
 605                         rev_author_cache_ = sm[4];
 606                         break;
 607                 }
 608         }
 609         tmpf.removeFile();
 610         if (rev_author_cache_.empty())
 611                 LYXERR(Debug::LYXVC,
 612                    "Could not retrieve revision info for " << version_ <<
 613                    " of " << getTarget(File));
 614 }
 615
 616
 617 void CVS::registrer(string const & msg)
 618 {
 619         doVCCommand("cvs -q add -m \"" + msg + "\" "
 620                 + getTarget(File),
 621                 FileName(owner_->filePath()));
 622 }
 623
 624
 625 void CVS::getDiff(OperationMode opmode, FileName const & tmpf)
 626 {
 627         doVCCommandWithOutput("cvs diff " + getTarget(opmode),
 628                 FileName(owner_->filePath()), tmpf, false);
 629 }
 630
 631
 632 int CVS::edit()
 633 {
 634         vcstatus = LOCKED;
 635         return doVCCommand("cvs -q edit " + getTarget(File),
 636                 FileName(owner_->filePath()));
 637 }
 638
 639
 640 int CVS::unedit()
 641 {
 642         vcstatus = UNLOCKED;
 643         return doVCCommand("cvs -q unedit " + getTarget(File),
 644                 FileName(owner_->filePath()));
 645 }
 646
 647
 648 int CVS::update(OperationMode opmode, FileName const & tmpf)
 649 {
 650         return doVCCommandWithOutput("cvs -q update "
 651                 + getTarget(opmode),
 652                 FileName(owner_->filePath()), tmpf, false);
 653 }
 654
 655
 656 string CVS::scanLogFile(FileName const & f, string & status)
 657 {
 658         ifstream ifs(f.toFilesystemEncoding().c_str());
 659
 660         while (ifs) {
 661                 string line;
 662                 getline(ifs, line);
 663                 LYXERR(Debug::LYXVC, line << "\n");
 664                 if (!line.empty())
 665                         status += line + "; ";
 666                 if (prefixIs(line, "C ")) {
 667                         ifs.close();
 668                         return line;
 669                 }
 670         }
 671         ifs.close();
 672         return string();
 673 }
 674
 675
 676 string CVS::checkIn(string const & msg)
 677 {
 678         CvsStatus status = getStatus();
 679         switch (status) {
 680         case UpToDate:
 681                 if (vcstatus != NOLOCKING)
 682                         unedit();
 683                 return "CVS: Proceeded";
 684         case LocallyModified:
 685         case LocallyAdded: {
 686                 int rc = doVCCommand("cvs -q commit -m \"" + msg + "\" "
 687                         + getTarget(File),
 688                     FileName(owner_->filePath()));
 689                 return rc ? string() : "CVS: Proceeded";
 690         }
 691         case NeedsMerge:
 692         case NeedsCheckout:
 693                 frontend::Alert::error(_("Revision control error."),
 694                         _("The repository version is newer then the current check out.\n"
 695                           "You have to update from repository first or revert your changes.")) ;
 696                 break;
 697         default:
 698                 frontend::Alert::error(_("Revision control error."),
 699                         bformat(_("Bad status when checking in changes.\n"
 700                                           "\n'%1$s'\n\n"),
 701                                 toString(status)));
 702                 break;
 703         }
 704         return string();
 705 }
 706
 707
 708 bool CVS::isLocked() const
 709 {
 710         FileName fn(owner_->absFileName());
 711         fn.refresh();
 712         return !fn.isReadOnly();
 713 }
 714
 715
 716 bool CVS::checkInEnabled()
 717 {
 718         if (vcstatus != NOLOCKING)
 719                 return isLocked();
 720         else
 721                 return true;
 722 }
 723
 724
 725 bool CVS::isCheckInWithConfirmation()
 726 {
 727         CvsStatus status = getStatus();
 728         return status == LocallyModified || status == LocallyAdded;
 729 }
 730
 731
 732 string CVS::checkOut()
 733 {
 734         if (vcstatus != NOLOCKING && edit())
 735                 return string();
 736         FileName tmpf = FileName::tempName("lyxvcout");
 737         if (tmpf.empty()) {
 738                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 739                 return string();
 740         }
 741
 742         int rc = update(File, tmpf);
 743         string log;
 744         string const res = scanLogFile(tmpf, log);
 745         if (!res.empty()) {
 746                 frontend::Alert::error(_("Revision control error."),
 747                         bformat(_("Error when updating from repository.\n"
 748                                 "You have to manually resolve the conflicts NOW!\n'%1$s'.\n\n"
 749                                 "After pressing OK, LyX will try to reopen the resolved document."),
 750                                 from_local8bit(res)));
 751                 rc = 0;
 752         }
 753
 754         tmpf.erase();
 755         return rc ? string() : log.empty() ? "CVS: Proceeded" : "CVS: " + log;
 756 }
 757
 758
 759 bool CVS::checkOutEnabled()
 760 {
 761         if (vcstatus != NOLOCKING)
 762                 return !isLocked();
 763         else
 764                 return true;
 765 }
 766
 767
 768 string CVS::repoUpdate()
 769 {
 770         FileName tmpf = FileName::tempName("lyxvcout");
 771         if (tmpf.empty()) {
 772                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 773                 return string();
 774         }
 775
 776         getDiff(Directory, tmpf);
 777         docstring res = tmpf.fileContents("UTF-8");
 778         if (!res.empty()) {
 779                 LYXERR(Debug::LYXVC, "Diff detected:\n" << res);
 780                 docstring const file = from_utf8(owner_->filePath());
 781                 docstring text = bformat(_("There were detected changes "
 782                                 "in the working directory:\n%1$s\n\n"
 783                                 "Possible file conflicts must be then resolved manually "
 784                                 "or you will need to revert back to the repository version."), file);
 785                 int ret = frontend::Alert::prompt(_("Changes detected"),
 786                                 text, 0, 1, _("&Continue"), _("&Abort"), _("View &Log ..."));
 787                 if (ret == 2 ) {
 788                         dispatch(FuncRequest(LFUN_DIALOG_SHOW, "file " + tmpf.absFileName()));
 789                         ret = frontend::Alert::prompt(_("Changes detected"),
 790                                 text, 0, 1, _("&Continue"), _("&Abort"));
 791                         hideDialogs("file", 0);
 792                 }
 793                 if (ret == 1 ) {
 794                         tmpf.removeFile();
 795                         return string();
 796                 }
 797         }
 798
 799         int rc = update(Directory, tmpf);
 800         res += "Update log:\n" + tmpf.fileContents("UTF-8");
 801         LYXERR(Debug::LYXVC, res);
 802
 803         string log;
 804         string sres = scanLogFile(tmpf, log);
 805         if (!sres.empty()) {
 806                 docstring const file = owner_->fileName().displayName(20);
 807                 frontend::Alert::error(_("Revision control error."),
 808                         bformat(_("Error when updating document %1$s from repository.\n"
 809                                           "You have to manually resolve the conflicts NOW!\n'%2$s'.\n\n"
 810                                           "After pressing OK, LyX will try to reopen the resolved document."),
 811                                 file, from_local8bit(sres)));
 812                 rc = 0;
 813         }
 814
 815         tmpf.removeFile();
 816
 817         return rc ? string() : log.empty() ? "CVS: Proceeded" : "CVS: " + log;
 818 }
 819
 820
 821 bool CVS::repoUpdateEnabled()
 822 {
 823         return true;
 824 }
 825
 826
 827 string CVS::lockingToggle()
 828 {
 829         lyxerr << "Sorry, not implemented." << endl;
 830         return string();
 831 }
 832
 833
 834 bool CVS::lockingToggleEnabled()
 835 {
 836         return false;
 837 }
 838
 839
 840 bool CVS::isRevertWithConfirmation()
 841 {
 842         CvsStatus status = getStatus();
 843         return !owner_->isClean() || status == LocallyModified || status == NeedsMerge;
 844 }
 845
 846
 847 bool CVS::revert()
 848 {
 849         // Reverts to the version in CVS repository and
 850         // gets the updated version from the repository.
 851         CvsStatus status = getStatus();
 852         switch (status) {
 853         case UpToDate:
 854                 if (vcstatus != NOLOCKING)
 855                         return 0 == unedit();
 856                 break;
 857         case NeedsMerge:
 858         case NeedsCheckout:
 859         case LocallyModified: {
 860                 FileName f(owner_->absFileName());
 861                 f.removeFile();
 862                 update(File, FileName());
 863                 owner_->markClean();
 864                 break;
 865         }
 866         case LocallyAdded: {
 867                 docstring const file = owner_->fileName().displayName(20);
 868                 frontend::Alert::error(_("Revision control error."),
 869                         bformat(_("The document %1$s is not in repository.\n"
 870                                   "You have to check in the first revision before you can revert."),
 871                                 file)) ;
 872                 return false;
 873         }
 874         default: {
 875                 docstring const file = owner_->fileName().displayName(20);
 876                 frontend::Alert::error(_("Revision control error."),
 877                         bformat(_("Cannot revert document %1$s to repository version.\n"
 878                                   "The status '%2$s' is unexpected."),
 879                                 file, toString(status)));
 880                 return false;
 881                 }
 882         }
 883         return true;
 884 }
 885
 886
 887 void CVS::undoLast()
 888 {
 889         // merge the current with the previous version
 890         // in a reverse patch kind of way, so that the
 891         // result is to revert the last changes.
 892         lyxerr << "Sorry, not implemented." << endl;
 893 }
 894
 895
 896 bool CVS::undoLastEnabled()
 897 {
 898         return false;
 899 }
 900
 901
 902 void CVS::getLog(FileName const & tmpf)
 903 {
 904         doVCCommandWithOutput("cvs log " + getTarget(File),
 905                 FileName(owner_->filePath()),
 906                 tmpf);
 907 }
 908
 909
 910 bool CVS::toggleReadOnlyEnabled()
 911 {
 912         return false;
 913 }
 914
 915
 916 string CVS::revisionInfo(LyXVC::RevisionInfo const info)
 917 {
 918         if (!version_.empty()) {
 919                 getRevisionInfo();
 920                 switch (info) {
 921                 case LyXVC::File:
 922                         return version_;
 923                 case LyXVC::Author:
 924                         return rev_author_cache_;
 925                 case LyXVC::Date:
 926                         return rev_date_cache_;
 927                 case LyXVC::Time:
 928                         return rev_time_cache_;
 929                 default: ;
 930                 }
 931         }
 932         return string();
 933 }
 934
 935
 936 bool CVS::prepareFileRevision(string const & revis, string & f)
 937 {
 938         string rev = revis;
 939         if (!VCS::makeRCSRevision(version_, rev))
 940                 return false;
 941
 942         FileName tmpf = FileName::tempName("lyxvcrev_" + rev + "_");
 943         if (tmpf.empty()) {
 944                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 945                 return false;
 946         }
 947
 948         doVCCommandWithOutput("cvs update -p -r" + rev + " "
 949                 + getTarget(File),
 950                 FileName(owner_->filePath()), tmpf);
 951         if (tmpf.isFileEmpty())
 952                 return false;
 953
 954         f = tmpf.absFileName();
 955         return true;
 956 }
 957
 958
 959 bool CVS::prepareFileRevisionEnabled()
 960 {
 961         return true;
 962 }
 963
 964
 965 /////////////////////////////////////////////////////////////////////
 966 //
 967 // SVN
 968 //
 969 /////////////////////////////////////////////////////////////////////
 970
 971 SVN::SVN(FileName const & m, FileName const & f)
 972 {
 973         owner_ = 0;
 974         master_ = m;
 975         file_ = f;
 976         locked_mode_ = 0;
 977         scanMaster();
 978 }
 979
 980
 981 FileName const SVN::findFile(FileName const & file)
 982 {
 983         // First we look for the .svn/entries in the same dir
 984         // where we have file.
 985         FileName const entries(onlyPath(file.absFileName()) + "/.svn/entries");
 986         string const tmpf = onlyFileName(file.absFileName());
 987         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under svn in `" << entries
 988                              << "' for `" << tmpf << '\'');
 989         if (entries.isReadableFile()) {
 990                 // Ok we are at least in a SVN dir. Parse the .svn/entries
 991                 // and see if we can find this file. We do a fast and
 992                 // dirty parse here.
 993                 ifstream ifs(entries.toFilesystemEncoding().c_str());
 994                 string line, oldline;
 995                 while (getline(ifs, line)) {
 996                         if (line == "dir" || line == "file")
 997                                 LYXERR(Debug::LYXVC, "\tEntries: " << oldline);
 998                         if (oldline == tmpf && line == "file")
 999                                 return entries;
1000                         oldline = line;
1001                 }
1002         }
1003         return FileName();
1004 }
1005
1006
1007 void SVN::scanMaster()
1008 {
1009         // vcstatus code is somewhat superflous, until we want
1010         // to implement read-only toggle for svn.
1011         vcstatus = NOLOCKING;
1012         if (checkLockMode()) {
1013                 if (isLocked()) {
1014                         vcstatus = LOCKED;
1015                 } else {
1016                         vcstatus = UNLOCKED;
1017                 }
1018         }
1019 }
1020
1021
1022 bool SVN::checkLockMode()
1023 {
1024         FileName tmpf = FileName::tempName("lyxvcout");
1025         if (tmpf.empty()){
1026                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1027                 return N_("Error: Could not generate logfile.");
1028         }
1029
1030         LYXERR(Debug::LYXVC, "Detecting locking mode...");
1031         if (doVCCommandCall("svn proplist " + quoteName(file_.onlyFileName())
1032                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1033                     file_.onlyPath()))
1034                 return false;
1035
1036         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
1037         string line;
1038         bool ret = false;
1039
1040         while (ifs) {
1041                 getline(ifs, line);
1042                 LYXERR(Debug::LYXVC, line);
1043                 if (contains(line, "svn:needs-lock"))
1044                         ret = true;
1045         }
1046         LYXERR(Debug::LYXVC, "Locking enabled: " << ret);
1047         ifs.close();
1048         locked_mode_ = ret;
1049         return ret;
1050
1051 }
1052
1053
1054 bool SVN::isLocked() const
1055 {
1056         file_.refresh();
1057         return !file_.isReadOnly();
1058 }
1059
1060
1061 void SVN::registrer(string const & /*msg*/)
1062 {
1063         doVCCommand("svn add -q " + quoteName(onlyFileName(owner_->absFileName())),
1064                     FileName(owner_->filePath()));
1065 }
1066
1067
1068 string SVN::checkIn(string const & msg)
1069 {
1070         FileName tmpf = FileName::tempName("lyxvcout");
1071         if (tmpf.empty()){
1072                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1073                 return N_("Error: Could not generate logfile.");
1074         }
1075
1076         doVCCommand("svn commit -m \"" + msg + "\" "
1077                     + quoteName(onlyFileName(owner_->absFileName()))
1078                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1079                     FileName(owner_->filePath()));
1080
1081         string log;
1082         string res = scanLogFile(tmpf, log);
1083         if (!res.empty())
1084                 frontend::Alert::error(_("Revision control error."),
1085                                 _("Error when committing to repository.\n"
1086                                 "You have to manually resolve the problem.\n"
1087                                 "LyX will reopen the document after you press OK."));
1088         else
1089                 fileLock(false, tmpf, log);
1090
1091         tmpf.erase();
1092         return log.empty() ? string() : "SVN: " + log;
1093 }
1094
1095
1096 bool SVN::checkInEnabled()
1097 {
1098         if (locked_mode_)
1099                 return isLocked();
1100         else
1101                 return true;
1102 }
1103
1104
1105 bool SVN::isCheckInWithConfirmation()
1106 {
1107         // FIXME one day common getDiff and perhaps OpMode for all backends
1108
1109         FileName tmpf = FileName::tempName("lyxvcout");
1110         if (tmpf.empty()) {
1111                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1112                 return true;
1113         }
1114
1115         doVCCommandCall("svn diff " + quoteName(owner_->absFileName())
1116                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1117                 FileName(owner_->filePath()));
1118
1119         docstring diff = tmpf.fileContents("UTF-8");
1120         tmpf.erase();
1121
1122         if (diff.empty())
1123                 return false;
1124
1125         return true;
1126 }
1127
1128
1129 // FIXME Correctly return code should be checked instead of this.
1130 // This would need another solution than just plain startscript.
1131 // Hint from Andre': QProcess::readAllStandardError()...
1132 string SVN::scanLogFile(FileName const & f, string & status)
1133 {
1134         ifstream ifs(f.toFilesystemEncoding().c_str());
1135         string line;
1136
1137         while (ifs) {
1138                 getline(ifs, line);
1139                 LYXERR(Debug::LYXVC, line << "\n");
1140                 if (!line.empty())
1141                         status += line + "; ";
1142                 if (prefixIs(line, "C ") || prefixIs(line, "CU ")
1143                                          || contains(line, "Commit failed")) {
1144                         ifs.close();
1145                         return line;
1146                 }
1147                 if (contains(line, "svn:needs-lock")) {
1148                         ifs.close();
1149                         return line;
1150                 }
1151         }
1152         ifs.close();
1153         return string();
1154 }
1155
1156
1157 void SVN::fileLock(bool lock, FileName const & tmpf, string &status)
1158 {
1159         if (!locked_mode_ || (isLocked() == lock))
1160                 return;
1161
1162         string const arg = lock ? "lock " : "unlock ";
1163         doVCCommand("svn "+ arg + quoteName(onlyFileName(owner_->absFileName()))
1164                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1165                     FileName(owner_->filePath()));
1166
1167         // Lock error messages go unfortunately on stderr and are unreachible this way.
1168         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
1169         string line;
1170         while (ifs) {
1171                 getline(ifs, line);
1172                 if (!line.empty()) status += line + "; ";
1173         }
1174         ifs.close();
1175
1176         if (!isLocked() && lock)
1177                 frontend::Alert::error(_("Revision control error."),
1178                         _("Error while acquiring write lock.\n"
1179                         "Another user is most probably editing\n"
1180                         "the current document now!\n"
1181                         "Also check the access to the repository."));
1182         if (isLocked() && !lock)
1183                 frontend::Alert::error(_("Revision control error."),
1184                         _("Error while releasing write lock.\n"
1185                         "Check the access to the repository."));
1186 }
1187
1188
1189 string SVN::checkOut()
1190 {
1191         FileName tmpf = FileName::tempName("lyxvcout");
1192         if (tmpf.empty()) {
1193                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1194                 return N_("Error: Could not generate logfile.");
1195         }
1196
1197         doVCCommand("svn update --non-interactive " + quoteName(onlyFileName(owner_->absFileName()))
1198                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1199                     FileName(owner_->filePath()));
1200
1201         string log;
1202         string const res = scanLogFile(tmpf, log);
1203         if (!res.empty())
1204                 frontend::Alert::error(_("Revision control error."),
1205                         bformat(_("Error when updating from repository.\n"
1206                                 "You have to manually resolve the conflicts NOW!\n'%1$s'.\n\n"
1207                                 "After pressing OK, LyX will try to reopen the resolved document."),
1208                         from_local8bit(res)));
1209
1210         fileLock(true, tmpf, log);
1211
1212         tmpf.erase();
1213         return log.empty() ? string() : "SVN: " + log;
1214 }
1215
1216
1217 bool SVN::checkOutEnabled()
1218 {
1219         if (locked_mode_)
1220                 return !isLocked();
1221         else
1222                 return true;
1223 }
1224
1225
1226 string SVN::repoUpdate()
1227 {
1228         FileName tmpf = FileName::tempName("lyxvcout");
1229         if (tmpf.empty()) {
1230                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1231                 return N_("Error: Could not generate logfile.");
1232         }
1233
1234         doVCCommand("svn diff " + quoteName(owner_->filePath())
1235                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1236                 FileName(owner_->filePath()));
1237         docstring res = tmpf.fileContents("UTF-8");
1238         if (!res.empty()) {
1239                 LYXERR(Debug::LYXVC, "Diff detected:\n" << res);
1240                 docstring const file = from_utf8(owner_->filePath());
1241                 docstring text = bformat(_("There were detected changes "
1242                                 "in the working directory:\n%1$s\n\n"
1243                                 "In case of file conflict version of the local directory files "
1244                                 "will be preferred."
1245                                 "\n\nContinue?"), file);
1246                 int ret = frontend::Alert::prompt(_("Changes detected"),
1247                                 text, 0, 1, _("&Yes"), _("&No"), _("View &Log ..."));
1248                 if (ret == 2 ) {
1249                         dispatch(FuncRequest(LFUN_DIALOG_SHOW, "file " + tmpf.absFileName()));
1250                         ret = frontend::Alert::prompt(_("Changes detected"),
1251                                 text, 0, 1, _("&Yes"), _("&No"));
1252                         hideDialogs("file", 0);
1253                 }
1254                 if (ret == 1 ) {
1255                         tmpf.erase();
1256                         return string();
1257                 }
1258         }
1259
1260         // Reverting looks too harsh, see bug #6255.
1261         // doVCCommand("svn revert -R " + quoteName(owner_->filePath())
1262         // + " > " + quoteName(tmpf.toFilesystemEncoding()),
1263         // FileName(owner_->filePath()));
1264         // res = "Revert log:\n" + tmpf.fileContents("UTF-8");
1265         doVCCommand("svn update --accept mine-full " + quoteName(owner_->filePath())
1266                 + " > " + quoteName(tmpf.toFilesystemEncoding()),
1267                 FileName(owner_->filePath()));
1268         res += "Update log:\n" + tmpf.fileContents("UTF-8");
1269
1270         LYXERR(Debug::LYXVC, res);
1271         tmpf.erase();
1272         return to_utf8(res);
1273 }
1274
1275
1276 bool SVN::repoUpdateEnabled()
1277 {
1278         return true;
1279 }
1280
1281
1282 string SVN::lockingToggle()
1283 {
1284         FileName tmpf = FileName::tempName("lyxvcout");
1285         if (tmpf.empty()) {
1286                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1287                 return N_("Error: Could not generate logfile.");
1288         }
1289
1290         int ret = doVCCommand("svn proplist " + quoteName(onlyFileName(owner_->absFileName()))
1291                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1292                     FileName(owner_->filePath()));
1293         if (ret)
1294                 return string();
1295
1296         string log;
1297         string res = scanLogFile(tmpf, log);
1298         bool locking = contains(res, "svn:needs-lock");
1299         if (!locking)
1300                 ret = doVCCommand("svn propset svn:needs-lock ON "
1301                     + quoteName(onlyFileName(owner_->absFileName()))
1302                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1303                     FileName(owner_->filePath()));
1304         else
1305                 ret = doVCCommand("svn propdel svn:needs-lock "
1306                     + quoteName(onlyFileName(owner_->absFileName()))
1307                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1308                     FileName(owner_->filePath()));
1309         if (ret)
1310                 return string();
1311
1312         tmpf.erase();
1313         frontend::Alert::warning(_("VCN File Locking"),
1314                 (locking ? _("Locking property unset.") : _("Locking property set.")) + "\n"
1315                 + _("Do not forget to commit the locking property into the repository."),
1316                 true);
1317
1318         return string("SVN: ") +  N_("Locking property set.");
1319 }
1320
1321
1322 bool SVN::lockingToggleEnabled()
1323 {
1324         return true;
1325 }
1326
1327
1328 bool SVN::revert()
1329 {
1330         // Reverts to the version in SVN repository and
1331         // gets the updated version from the repository.
1332         string const fil = quoteName(onlyFileName(owner_->absFileName()));
1333
1334         if (doVCCommand("svn revert -q " + fil,
1335                     FileName(owner_->filePath())))
1336                 return false;
1337         owner_->markClean();
1338         return true;
1339 }
1340
1341
1342 bool SVN::isRevertWithConfirmation()
1343 {
1344         //FIXME owner && diff
1345         return true;
1346 }
1347
1348
1349 void SVN::undoLast()
1350 {
1351         // merge the current with the previous version
1352         // in a reverse patch kind of way, so that the
1353         // result is to revert the last changes.
1354         lyxerr << "Sorry, not implemented." << endl;
1355 }
1356
1357
1358 bool SVN::undoLastEnabled()
1359 {
1360         return false;
1361 }
1362
1363
1364 string SVN::revisionInfo(LyXVC::RevisionInfo const info)
1365 {
1366         if (info == LyXVC::Tree) {
1367                         if (rev_tree_cache_.empty())
1368                                 if (!getTreeRevisionInfo())
1369                                         rev_tree_cache_ = "?";
1370                         if (rev_tree_cache_ == "?")
1371                                 return string();
1372
1373                         return rev_tree_cache_;
1374         }
1375
1376         // fill the rest of the attributes for a single file
1377         if (rev_file_cache_.empty())
1378                 if (!getFileRevisionInfo())
1379                         rev_file_cache_ = "?";
1380
1381         switch (info) {
1382                 case LyXVC::File:
1383                         if (rev_file_cache_ == "?")
1384                                 return string();
1385                         return rev_file_cache_;
1386                 case LyXVC::Author:
1387                         return rev_author_cache_;
1388                 case LyXVC::Date:
1389                         return rev_date_cache_;
1390                 case LyXVC::Time:
1391                         return rev_time_cache_;
1392                 default: ;
1393
1394         }
1395
1396         return string();
1397 }
1398
1399
1400 bool SVN::getFileRevisionInfo()
1401 {
1402         FileName tmpf = FileName::tempName("lyxvcout");
1403         if (tmpf.empty()) {
1404                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1405                 return N_("Error: Could not generate logfile.");
1406         }
1407
1408         doVCCommand("svn info --xml " + quoteName(onlyFileName(owner_->absFileName()))
1409                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1410                     FileName(owner_->filePath()));
1411
1412         if (tmpf.empty())
1413                 return false;
1414
1415         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
1416         string line;
1417         // commit log part
1418         bool c = false;
1419         string rev;
1420
1421         while (ifs) {
1422                 getline(ifs, line);
1423                 LYXERR(Debug::LYXVC, line);
1424                 if (prefixIs(line, "<commit"))
1425                         c = true;
1426                 if (c && prefixIs(line, "   revision=\"") && suffixIs(line, "\">")) {
1427                         string l1 = subst(line, "revision=\"", "");
1428                         string l2 = trim(subst(l1, "\">", ""));
1429                         if (isStrInt(l2))
1430                                 rev_file_cache_ = rev = l2;
1431                 }
1432                 if (c && prefixIs(line, "<author>") && suffixIs(line, "</author>")) {
1433                         string l1 = subst(line, "<author>", "");
1434                         string l2 = subst(l1, "</author>", "");
1435                         rev_author_cache_ = l2;
1436                 }
1437                 if (c && prefixIs(line, "<date>") && suffixIs(line, "</date>")) {
1438                         string l1 = subst(line, "<date>", "");
1439                         string l2 = subst(l1, "</date>", "");
1440                         l2 = split(l2, l1, 'T');
1441                         rev_date_cache_ = l1;
1442                         l2 = split(l2, l1, '.');
1443                         rev_time_cache_ = l1;
1444                 }
1445         }
1446
1447         ifs.close();
1448         tmpf.erase();
1449         return !rev.empty();
1450 }
1451
1452
1453 bool SVN::getTreeRevisionInfo()
1454 {
1455         FileName tmpf = FileName::tempName("lyxvcout");
1456         if (tmpf.empty()) {
1457                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1458                 return N_("Error: Could not generate logfile.");
1459         }
1460
1461         doVCCommand("svnversion -n . > " + quoteName(tmpf.toFilesystemEncoding()),
1462                     FileName(owner_->filePath()));
1463
1464         if (tmpf.empty())
1465                 return false;
1466
1467         // only first line in case something bad happens.
1468         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
1469         string line;
1470         getline(ifs, line);
1471         ifs.close();
1472         tmpf.erase();
1473
1474         rev_tree_cache_ = line;
1475         return !line.empty();
1476 }
1477
1478
1479 void SVN::getLog(FileName const & tmpf)
1480 {
1481         doVCCommand("svn log " + quoteName(onlyFileName(owner_->absFileName()))
1482                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1483                     FileName(owner_->filePath()));
1484 }
1485
1486
1487 bool SVN::prepareFileRevision(string const & revis, string & f)
1488 {
1489         if (!isStrInt(revis))
1490                 return false;
1491
1492         int rev = convert<int>(revis);
1493         if (rev <= 0)
1494                 if (!getFileRevisionInfo())
1495                         return false;
1496         if (rev == 0)
1497                 rev = convert<int>(rev_file_cache_);
1498         // go back for minus rev
1499         else if (rev < 0) {
1500                 rev = rev + convert<int>(rev_file_cache_);
1501                 if (rev < 1)
1502                         return false;
1503         }
1504
1505         string revname = convert<string>(rev);
1506         FileName tmpf = FileName::tempName("lyxvcrev_" + revname + "_");
1507         if (tmpf.empty()) {
1508                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1509                 return false;
1510         }
1511
1512         doVCCommand("svn cat -r " + revname + " "
1513                       + quoteName(onlyFileName(owner_->absFileName()))
1514                       + " > " + quoteName(tmpf.toFilesystemEncoding()),
1515                 FileName(owner_->filePath()));
1516         if (tmpf.isFileEmpty())
1517                 return false;
1518
1519         f = tmpf.absFileName();
1520         return true;
1521 }
1522
1523
1524 bool SVN::prepareFileRevisionEnabled()
1525 {
1526         return true;
1527 }
1528
1529
1530
1531 bool SVN::toggleReadOnlyEnabled()
1532 {
1533         return false;
1534 }
1535
1536
1537 } // namespace lyx