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/PathChanger.h"
  28 #include "support/Systemcall.h"
  29 #include "support/TempFile.h"
  30
  31 #include <fstream>
  32 #include <iomanip>
  33 #include <regex>
  34 #include <sstream>
  35
  36 using namespace std;
  37 using namespace lyx::support;
  38
  39
  40 namespace lyx {
  41
  42
  43 int VCS::doVCCommandCall(string const & cmd, FileName const & path)
  44 {
  45         LYXERR(Debug::LYXVC, "doVCCommandCall: " << cmd);
  46         Systemcall one;
  47         support::PathChanger p(path);
  48         return one.startscript(Systemcall::Wait, cmd, string(), string(), false);
  49 }
  50
  51
  52 int VCS::doVCCommand(string const & cmd, FileName const & path, bool reportError)
  53 {
  54         if (owner_)
  55                 owner_->setBusy(true);
  56
  57         int const ret = doVCCommandCall(cmd, path);
  58
  59         if (owner_)
  60                 owner_->setBusy(false);
  61         if (ret && reportError) {
  62                 docstring rcsmsg;
  63                 if (prefixIs(cmd, "ci "))
  64                         rcsmsg = "\n" + _("Perhaps the RCS package is not installed on your system?");
  65                 frontend::Alert::error(_("Revision control error."),
  66                         bformat(_("Some problem occurred while running the command:\n"
  67                                   "'%1$s'.") + rcsmsg,
  68                         from_utf8(cmd)));
  69         }
  70         return ret;
  71 }
  72
  73
  74 bool VCS::makeRCSRevision(string const &version, string &revis) const
  75 {
  76         string rev = revis;
  77
  78         if (isStrInt(rev)) {
  79                 int back = convert<int>(rev);
  80                 // if positive use as the last number in the whole revision string
  81                 if (back > 0) {
  82                         string base;
  83                         rsplit(version, base , '.');
  84                         rev = base + '.' + rev;
  85                 }
  86                 if (back == 0)
  87                         rev = version;
  88                 // we care about the last number from revision string
  89                 // in case of backward indexing
  90                 if (back < 0) {
  91                         string cur, base;
  92                         cur = rsplit(version, base , '.');
  93                         if (!isStrInt(cur))
  94                                 return false;
  95                         int want = convert<int>(cur) + back;
  96                         if (want <= 0)
  97                                 return false;
  98
  99                         rev = base + '.' + convert<string>(want);
 100                 }
 101         }
 102
 103         revis = rev;
 104         return true;
 105 }
 106
 107
 108 FileName VCS::checkParentDirs(FileName const & start, std::string const & file)
 109 {
 110         static FileName empty;
 111         FileName dirname = start.onlyPath();
 112         do {
 113                 FileName tocheck = FileName(addPathName(dirname.absFileName(), file));
 114                 LYXERR(Debug::LYXVC, "check file: " << tocheck.absFileName());
 115                 if (tocheck.exists())
 116                         return tocheck;
 117                 // this construct because of #8295
 118                 dirname = FileName(dirname.absFileName()).parentPath();
 119         } while (!dirname.empty());
 120         return empty;
 121 }
 122
 123
 124 /////////////////////////////////////////////////////////////////////
 125 //
 126 // RCS
 127 //
 128 /////////////////////////////////////////////////////////////////////
 129
 130 RCS::RCS(FileName const & m, Buffer * b) : VCS(b)
 131 {
 132         // Here we know that the buffer file is either already in RCS or
 133         // about to be registered
 134         master_ = m;
 135         scanMaster();
 136 }
 137
 138
 139 FileName const RCS::findFile(FileName const & file)
 140 {
 141         // Check if *,v exists.
 142         FileName tmp(file.absFileName() + ",v");
 143         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under rcs: " << tmp);
 144         if (tmp.isReadableFile()) {
 145                 LYXERR(Debug::LYXVC, "Yes, " << file << " is under rcs.");
 146                 return tmp;
 147         }
 148
 149         // Check if RCS/*,v exists.
 150         tmp = FileName(addName(addPath(onlyPath(file.absFileName()), "RCS"), file.absFileName()) + ",v");
 151         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under rcs: " << tmp);
 152         if (tmp.isReadableFile()) {
 153                 LYXERR(Debug::LYXVC, "Yes, " << file << " is under rcs.");
 154                 return tmp;
 155         }
 156
 157         return FileName();
 158 }
 159
 160
 161 bool RCS::retrieve(FileName const & file)
 162 {
 163         LYXERR(Debug::LYXVC, "LyXVC::RCS: retrieve.\n\t" << file);
 164         // The caller ensures that file does not exist, so no need to check that.
 165         return doVCCommandCall("co -q -r " + quoteName(file.toFilesystemEncoding()),
 166                                FileName()) == 0;
 167 }
 168
 169
 170 void RCS::scanMaster()
 171 {
 172         if (master_.empty())
 173                 return;
 174
 175         LYXERR(Debug::LYXVC, "LyXVC::RCS: scanMaster: " << master_);
 176
 177         ifstream ifs(master_.toFilesystemEncoding().c_str());
 178         // limit the size of strings we read to avoid memory problems
 179         ifs >> setw(65636);
 180
 181         string token;
 182         bool read_enough = false;
 183
 184         while (!read_enough && ifs >> token) {
 185                 LYXERR(Debug::LYXVC, "LyXVC::scanMaster: current lex text: `"
 186                         << token << '\'');
 187
 188                 if (token.empty())
 189                         continue;
 190                 else if (token == "head") {
 191                         // get version here
 192                         string tmv;
 193                         ifs >> tmv;
 194                         tmv = rtrim(tmv, ";");
 195                         version_ = tmv;
 196                         LYXERR(Debug::LYXVC, "LyXVC: version found to be " << tmv);
 197                 } else if (contains(token, "access")
 198                            || contains(token, "symbols")
 199                            || contains(token, "strict")) {
 200                         // nothing
 201                 } else if (contains(token, "locks")) {
 202                         // get locker here
 203                         if (contains(token, ';')) {
 204                                 locker_ = "Unlocked";
 205                                 vcstatus_ = UNLOCKED;
 206                                 continue;
 207                         }
 208                         string tmpt;
 209                         string s1;
 210                         string s2;
 211                         do {
 212                                 ifs >> tmpt;
 213                                 s1 = rtrim(tmpt, ";");
 214                                 // tmp is now in the format <user>:<version>
 215                                 s1 = split(s1, s2, ':');
 216                                 // s2 is user, and s1 is version
 217                                 if (s1 == version_) {
 218                                         locker_ = s2;
 219                                         vcstatus_ = LOCKED;
 220                                         break;
 221                                 }
 222                         } while (!contains(tmpt, ';'));
 223
 224                 } else if (token == "comment") {
 225                         // we don't need to read any further than this.
 226                         read_enough = true;
 227                 } else {
 228                         // unexpected
 229                         LYXERR(Debug::LYXVC, "LyXVC::scanMaster(): unexpected token");
 230                 }
 231         }
 232 }
 233
 234
 235 void RCS::registrer(string const & msg)
 236 {
 237         string cmd = "ci -q -u -i -t-\"";
 238         cmd += msg;
 239         cmd += "\" ";
 240         cmd += quoteName(onlyFileName(owner_->absFileName()));
 241         doVCCommand(cmd, FileName(owner_->filePath()));
 242 }
 243
 244
 245 bool RCS::renameEnabled()
 246 {
 247         return false;
 248 }
 249
 250
 251 string RCS::rename(support::FileName const & /*newFile*/, string const & /*msg*/)
 252 {
 253         // not implemented, since a left-over file.lyx,v would be confusing.
 254         return string();
 255 }
 256
 257
 258 bool RCS::copyEnabled()
 259 {
 260         return true;
 261 }
 262
 263
 264 string RCS::copy(support::FileName const & newFile, string const & msg)
 265 {
 266         // RCS has no real copy command, so we create a poor mans version
 267         support::FileName const oldFile(owner_->absFileName());
 268         if (!oldFile.copyTo(newFile))
 269                 return string();
 270         FileName path(oldFile.onlyPath());
 271         string relFile(to_utf8(newFile.relPath(path.absFileName())));
 272         string cmd = "ci -q -u -i -t-\"";
 273         cmd += msg;
 274         cmd += "\" ";
 275         cmd += quoteName(relFile);
 276         return doVCCommand(cmd, path) ? string() : "RCS: Proceeded";
 277 }
 278
 279
 280 LyXVC::CommandResult RCS::checkIn(string const & msg, string & log)
 281 {
 282         int ret = doVCCommand("ci -q -u -m\"" + msg + "\" "
 283                     + quoteName(onlyFileName(owner_->absFileName())),
 284                     FileName(owner_->filePath()));
 285         if (ret)
 286                 return LyXVC::ErrorCommand;
 287         log = "RCS: Proceeded";
 288         return LyXVC::VCSuccess;
 289 }
 290
 291
 292 bool RCS::checkInEnabled()
 293 {
 294         return owner_ && !owner_->hasReadonlyFlag();
 295 }
 296
 297
 298 bool RCS::isCheckInWithConfirmation()
 299 {
 300         // FIXME one day common getDiff for all backends
 301         // docstring diff;
 302         // if (getDiff(file, diff) && diff.empty())
 303         //      return false;
 304
 305         TempFile tempfile("lyxvcout");
 306         FileName tmpf = tempfile.name();
 307         if (tmpf.empty()) {
 308                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 309                 return true;
 310         }
 311
 312         doVCCommandCall("rcsdiff " + quoteName(owner_->absFileName())
 313                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
 314                 FileName(owner_->filePath()));
 315
 316         docstring diff = tmpf.fileContents("UTF-8");
 317
 318         if (diff.empty())
 319                 return false;
 320
 321         return true;
 322 }
 323
 324
 325 string RCS::checkOut()
 326 {
 327         owner_->markClean();
 328         int ret = doVCCommand("co -q -l " + quoteName(onlyFileName(owner_->absFileName())),
 329                     FileName(owner_->filePath()));
 330         return ret ? string() : "RCS: Proceeded";
 331 }
 332
 333
 334 bool RCS::checkOutEnabled()
 335 {
 336         return owner_ && owner_->hasReadonlyFlag();
 337 }
 338
 339
 340 string RCS::repoUpdate()
 341 {
 342         lyxerr << "Sorry, not implemented." << endl;
 343         return string();
 344 }
 345
 346
 347 bool RCS::repoUpdateEnabled()
 348 {
 349         return false;
 350 }
 351
 352
 353 string RCS::lockingToggle()
 354 {
 355         //FIXME this might be actually possible, study rcs -U, rcs -L.
 356         //State should be easy to get inside scanMaster.
 357         //It would fix #4370 and make rcs/svn usage even more closer.
 358         lyxerr << "Sorry, not implemented." << endl;
 359         return string();
 360 }
 361
 362
 363 bool RCS::lockingToggleEnabled()
 364 {
 365         return false;
 366 }
 367
 368
 369 bool RCS::revert()
 370 {
 371         if (doVCCommand("co -f -u" + version_ + ' '
 372                     + quoteName(onlyFileName(owner_->absFileName())),
 373                     FileName(owner_->filePath())))
 374                 return false;
 375         // We ignore changes and just reload!
 376         owner_->markClean();
 377         return true;
 378 }
 379
 380
 381 bool RCS::isRevertWithConfirmation()
 382 {
 383         //FIXME owner && diff ?
 384         return true;
 385 }
 386
 387
 388 void RCS::undoLast()
 389 {
 390         LYXERR(Debug::LYXVC, "LyXVC: undoLast");
 391         doVCCommand("rcs -o" + version_ + ' '
 392                     + quoteName(onlyFileName(owner_->absFileName())),
 393                     FileName(owner_->filePath()));
 394 }
 395
 396
 397 bool RCS::undoLastEnabled()
 398 {
 399         return owner_->hasReadonlyFlag();
 400 }
 401
 402
 403 void RCS::getLog(FileName const & tmpf)
 404 {
 405         doVCCommand("rlog " + quoteName(onlyFileName(owner_->absFileName()))
 406                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
 407                     FileName(owner_->filePath()));
 408 }
 409
 410
 411 bool RCS::toggleReadOnlyEnabled()
 412 {
 413         // This got broken somewhere along lfuns dispatch reorganization.
 414         // reloadBuffer would be needed after this, but thats problematic
 415         // since we are inside Buffer::dispatch.
 416         // return true;
 417         return false;
 418 }
 419
 420
 421 string RCS::revisionInfo(LyXVC::RevisionInfo const info)
 422 {
 423         if (info == LyXVC::File)
 424                 return version_;
 425         // fill the rest of the attributes for a single file
 426         if (rev_date_cache_.empty())
 427                 if (!getRevisionInfo())
 428                         return string();
 429
 430         switch (info) {
 431                 case LyXVC::Author:
 432                         return rev_author_cache_;
 433                 case LyXVC::Date:
 434                         return rev_date_cache_;
 435                 case LyXVC::Time:
 436                         return rev_time_cache_;
 437                 default:
 438                         break;
 439         }
 440
 441         return string();
 442 }
 443
 444
 445 bool RCS::getRevisionInfo()
 446 {
 447         TempFile tempfile("lyxvcout");
 448         FileName tmpf = tempfile.name();
 449         if (tmpf.empty()) {
 450                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 451                 return false;
 452         }
 453         doVCCommand("rlog -r " + quoteName(onlyFileName(owner_->absFileName()))
 454                 + " > " + quoteName(tmpf.toFilesystemEncoding()),
 455                 FileName(owner_->filePath()));
 456
 457         if (tmpf.empty())
 458                 return false;
 459
 460         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
 461         string line;
 462
 463         // we reached to the entry, i.e. after initial log message
 464         bool entry=false;
 465         // line with critical info, e.g:
 466         //"date: 2011/07/02 11:02:54;  author: sanda;  state: Exp;  lines: +17 -2"
 467         string result;
 468
 469         while (ifs) {
 470                 getline(ifs, line);
 471                 LYXERR(Debug::LYXVC, line);
 472                 if (entry && prefixIs(line, "date:")) {
 473                         result = line;
 474                         break;
 475                 }
 476                 if (prefixIs(line, "revision"))
 477                         entry = true;
 478         }
 479         if (result.empty())
 480                 return false;
 481
 482         rev_date_cache_ = token(result, ' ', 1);
 483         rev_time_cache_ = rtrim(token(result, ' ', 2), ";");
 484         rev_author_cache_ = trim(token(token(result, ';', 1), ':', 1));
 485
 486         return !rev_author_cache_.empty();
 487 }
 488
 489 bool RCS::prepareFileRevision(string const &revis, string & f)
 490 {
 491         string rev = revis;
 492         if (!VCS::makeRCSRevision(version_, rev))
 493                 return false;
 494
 495         TempFile tempfile("lyxvcrev_" + rev + '_');
 496         tempfile.setAutoRemove(false);
 497         FileName tmpf = tempfile.name();
 498         if (tmpf.empty()) {
 499                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 500                 return false;
 501         }
 502
 503         doVCCommand("co -p" + rev + ' '
 504                       + quoteName(onlyFileName(owner_->absFileName()))
 505                       + " > " + quoteName(tmpf.toFilesystemEncoding()),
 506                 FileName(owner_->filePath()));
 507         tmpf.refresh();
 508         if (tmpf.isFileEmpty())
 509                 return false;
 510
 511         f = tmpf.absFileName();
 512         return true;
 513 }
 514
 515
 516 bool RCS::prepareFileRevisionEnabled()
 517 {
 518         return true;
 519 }
 520
 521
 522 /////////////////////////////////////////////////////////////////////
 523 //
 524 // CVS
 525 //
 526 /////////////////////////////////////////////////////////////////////
 527
 528 CVS::CVS(FileName const & m, Buffer * b) : VCS(b)
 529 {
 530         // Here we know that the buffer file is either already in CVS or
 531         // about to be registered
 532         master_ = m;
 533         have_rev_info_ = false;
 534         scanMaster();
 535 }
 536
 537
 538 FileName const CVS::findFile(FileName const & file)
 539 {
 540         // First we look for the CVS/Entries in the same dir
 541         // where we have file.
 542         // Note that it is not necessary to search parent directories, since
 543         // there will be a CVS/Entries file in every subdirectory.
 544         FileName const entries(onlyPath(file.absFileName()) + "/CVS/Entries");
 545         string const tmpf = '/' + onlyFileName(file.absFileName()) + '/';
 546         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under cvs in `" << entries
 547                              << "' for `" << tmpf << '\'');
 548         if (entries.isReadableFile()) {
 549                 // Ok we are at least in a CVS dir. Parse the CVS/Entries
 550                 // and see if we can find this file. We do a fast and
 551                 // dirty parse here.
 552                 ifstream ifs(entries.toFilesystemEncoding().c_str());
 553                 string line;
 554                 while (getline(ifs, line)) {
 555                         LYXERR(Debug::LYXVC, "\tEntries: " << line);
 556                         if (contains(line, tmpf))
 557                                 return entries;
 558                 }
 559         }
 560         return FileName();
 561 }
 562
 563
 564 void CVS::scanMaster()
 565 {
 566         LYXERR(Debug::LYXVC, "LyXVC::CVS: scanMaster. \n     Checking: " << master_);
 567         // Ok now we do the real scan...
 568         ifstream ifs(master_.toFilesystemEncoding().c_str());
 569         string const name = onlyFileName(owner_->absFileName());
 570         string const tmpf = '/' + name + '/';
 571         LYXERR(Debug::LYXVC, "\tlooking for `" << tmpf << '\'');
 572         string line;
 573         static regex const reg("/(.*)/(.*)/(.*)/(.*)/(.*)");
 574         while (getline(ifs, line)) {
 575                 LYXERR(Debug::LYXVC, "\t  line: " << line);
 576                 if (contains(line, tmpf)) {
 577                         // Ok extract the fields.
 578                         smatch sm;
 579                         if (!regex_match(line, sm, reg)) {
 580                                 LYXERR(Debug::LYXVC, "\t  Cannot parse line. Skipping.");
 581                                 continue;
 582                         }
 583
 584                         //sm[0]; // whole matched string
 585                         //sm[1]; // filename
 586                         version_ = sm.str(2);
 587                         string const file_date = sm.str(3);
 588
 589                         //sm[4]; // options
 590                         //sm[5]; // tag or tagdate
 591                         FileName file(owner_->absFileName());
 592                         if (file.isReadableFile()) {
 593                                 time_t const mod = file.lastModified();
 594                                 string const mod_date = rtrim(asctime(gmtime(&mod)), "\n");
 595                                 LYXERR(Debug::LYXVC, "Date in Entries: `" << file_date
 596                                         << "'\nModification date of file: `" << mod_date << '\'');
 597                                 if (file.isReadOnly()) {
 598                                         // readonly checkout is unlocked
 599                                         vcstatus_ = UNLOCKED;
 600                                 } else {
 601                                         FileName bdir(addPath(master_.onlyPath().absFileName(),"Base"));
 602                                         FileName base(addName(bdir.absFileName(),name));
 603                                         // if base version is existent "cvs edit" was used to lock
 604                                         vcstatus_ = base.isReadableFile() ? LOCKED : NOLOCKING;
 605                                 }
 606                         } else {
 607                                 vcstatus_ = NOLOCKING;
 608                         }
 609                         break;
 610                 }
 611         }
 612 }
 613
 614
 615 bool CVS::retrieve(FileName const & file)
 616 {
 617         LYXERR(Debug::LYXVC, "LyXVC::CVS: retrieve.\n\t" << file);
 618         // The caller ensures that file does not exist, so no need to check that.
 619         return doVCCommandCall("cvs -q update " + quoteName(file.toFilesystemEncoding()),
 620                                file.onlyPath()) == 0;
 621 }
 622
 623
 624 string const CVS::getTarget(OperationMode opmode) const
 625 {
 626         switch(opmode) {
 627         case Directory:
 628                 // in client server mode CVS does not like full path operand for directory operation
 629                 // since LyX switches to the repo dir "." is good enough as target
 630                 return ".";
 631         case File:
 632                 return quoteName(onlyFileName(owner_->absFileName()));
 633         }
 634         return string();
 635 }
 636
 637
 638 docstring CVS::toString(CvsStatus status) const
 639 {
 640         switch (status) {
 641         case UpToDate:
 642                 return _("Up-to-date");
 643         case LocallyModified:
 644                 return _("Locally Modified");
 645         case LocallyAdded:
 646                 return _("Locally Added");
 647         case NeedsMerge:
 648                 return _("Needs Merge");
 649         case NeedsCheckout:
 650                 return _("Needs Checkout");
 651         case NoCvsFile:
 652                 return _("No CVS file");
 653         case StatusError:
 654                 return _("Cannot retrieve CVS status");
 655         }
 656         return docstring();
 657 }
 658
 659
 660 int CVS::doVCCommandWithOutput(string const & cmd, FileName const & path,
 661         FileName const & output, bool reportError)
 662 {
 663         string redirection = output.empty() ? "" : " > " + quoteName(output.toFilesystemEncoding());
 664         return doVCCommand(cmd + redirection, path, reportError);
 665 }
 666
 667
 668 int CVS::doVCCommandCallWithOutput(std::string const & cmd,
 669         support::FileName const & path,
 670         support::FileName const & output)
 671 {
 672         string redirection = output.empty() ? "" : " > " + quoteName(output.toFilesystemEncoding());
 673         return doVCCommandCall(cmd + redirection, path);
 674 }
 675
 676
 677 CVS::CvsStatus CVS::getStatus()
 678 {
 679         TempFile tempfile("lyxvout");
 680         FileName tmpf = tempfile.name();
 681         if (tmpf.empty()) {
 682                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 683                 return StatusError;
 684         }
 685
 686         if (doVCCommandCallWithOutput("cvs status " + getTarget(File),
 687                 FileName(owner_->filePath()), tmpf)) {
 688                 return StatusError;
 689         }
 690
 691         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
 692         CvsStatus status = NoCvsFile;
 693
 694         while (ifs) {
 695                 string line;
 696                 getline(ifs, line);
 697                 LYXERR(Debug::LYXVC, line << '\n');
 698                 if (prefixIs(line, "File:")) {
 699                         if (contains(line, "Up-to-date"))
 700                                 status = UpToDate;
 701                         else if (contains(line, "Locally Modified"))
 702                                 status = LocallyModified;
 703                         else if (contains(line, "Locally Added"))
 704                                 status = LocallyAdded;
 705                         else if (contains(line, "Needs Merge"))
 706                                 status = NeedsMerge;
 707                         else if (contains(line, "Needs Checkout"))
 708                                 status = NeedsCheckout;
 709                 }
 710         }
 711         return status;
 712 }
 713
 714 void CVS::getRevisionInfo()
 715 {
 716         if (have_rev_info_)
 717                 return;
 718         have_rev_info_ = true;
 719         TempFile tempfile("lyxvout");
 720         FileName tmpf = tempfile.name();
 721         if (tmpf.empty()) {
 722                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 723                 return;
 724         }
 725
 726         int rc = doVCCommandCallWithOutput("cvs log -r" + version_
 727                 + ' ' + getTarget(File),
 728                 FileName(owner_->filePath()), tmpf);
 729         if (rc) {
 730                 LYXERR(Debug::LYXVC, "cvs log failed with exit code " << rc);
 731                 return;
 732         }
 733
 734         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
 735         static regex const reg("date: (.*) (.*) (.*);  author: (.*);  state: (.*);(.*)");
 736
 737         while (ifs) {
 738                 string line;
 739                 getline(ifs, line);
 740                 LYXERR(Debug::LYXVC, line << '\n');
 741                 if (prefixIs(line, "date:")) {
 742                         smatch sm;
 743                         if (regex_match(line, sm, reg)) {
 744                           //sm[0]; // whole matched string
 745                           rev_date_cache_ = sm[1];
 746                           rev_time_cache_ = sm[2];
 747                           //sm[3]; // GMT offset
 748                           rev_author_cache_ = sm[4];
 749                         } else
 750                           LYXERR(Debug::LYXVC, "\tCannot parse line. Skipping.");
 751                         break;
 752                 }
 753         }
 754         if (rev_author_cache_.empty())
 755                 LYXERR(Debug::LYXVC,
 756                    "Could not retrieve revision info for " << version_ <<
 757                    " of " << getTarget(File));
 758 }
 759
 760
 761 void CVS::registrer(string const & msg)
 762 {
 763         doVCCommand("cvs -q add -m \"" + msg + "\" "
 764                 + getTarget(File),
 765                 FileName(owner_->filePath()));
 766 }
 767
 768
 769 bool CVS::renameEnabled()
 770 {
 771         return true;
 772 }
 773
 774
 775 string CVS::rename(support::FileName const & newFile, string const & msg)
 776 {
 777         // CVS has no real rename command, so we create a poor mans version
 778         support::FileName const oldFile(owner_->absFileName());
 779         string ret = copy(newFile, msg);
 780         if (ret.empty())
 781                 return ret;
 782         string cmd = "cvs -q remove -m \"" + msg + "\" " +
 783                 quoteName(oldFile.onlyFileName());
 784         FileName path(oldFile.onlyPath());
 785         return doVCCommand(cmd, path) ? string() : ret;
 786 }
 787
 788
 789 bool CVS::copyEnabled()
 790 {
 791         return true;
 792 }
 793
 794
 795 string CVS::copy(support::FileName const & newFile, string const & msg)
 796 {
 797         // CVS has no real copy command, so we create a poor mans version
 798         support::FileName const oldFile(owner_->absFileName());
 799         if (!oldFile.copyTo(newFile))
 800                 return string();
 801         FileName path(oldFile.onlyPath());
 802         string relFile(to_utf8(newFile.relPath(path.absFileName())));
 803         string cmd("cvs -q add -m \"" + msg + "\" " + quoteName(relFile));
 804         return doVCCommand(cmd, path) ? string() : "CVS: Proceeded";
 805 }
 806
 807
 808 void CVS::getDiff(OperationMode opmode, FileName const & tmpf)
 809 {
 810         doVCCommandWithOutput("cvs diff " + getTarget(opmode),
 811                 FileName(owner_->filePath()), tmpf, false);
 812 }
 813
 814
 815 int CVS::edit()
 816 {
 817         vcstatus_ = LOCKED;
 818         return doVCCommand("cvs -q edit " + getTarget(File),
 819                 FileName(owner_->filePath()));
 820 }
 821
 822
 823 int CVS::unedit()
 824 {
 825         vcstatus_ = UNLOCKED;
 826         return doVCCommand("cvs -q unedit " + getTarget(File),
 827                 FileName(owner_->filePath()));
 828 }
 829
 830
 831 int CVS::update(OperationMode opmode, FileName const & tmpf)
 832 {
 833         return doVCCommandWithOutput("cvs -q update "
 834                 + getTarget(opmode),
 835                 FileName(owner_->filePath()), tmpf, false);
 836 }
 837
 838
 839 string CVS::scanLogFile(FileName const & f, string & status)
 840 {
 841         ifstream ifs(f.toFilesystemEncoding().c_str());
 842
 843         while (ifs) {
 844                 string line;
 845                 getline(ifs, line);
 846                 LYXERR(Debug::LYXVC, line << '\n');
 847                 if (!line.empty())
 848                         status += line + "; ";
 849                 if (prefixIs(line, "C ")) {
 850                         ifs.close();
 851                         return line;
 852                 }
 853         }
 854         ifs.close();
 855         return string();
 856 }
 857
 858
 859 LyXVC::CommandResult CVS::checkIn(string const & msg, string & log)
 860 {
 861         CvsStatus status = getStatus();
 862         switch (status) {
 863         case UpToDate:
 864                 if (vcstatus_ != NOLOCKING)
 865                         if (unedit())
 866                                 return LyXVC::ErrorCommand;
 867                 log = "CVS: Proceeded";
 868                 return LyXVC::VCSuccess;
 869         case LocallyModified:
 870         case LocallyAdded: {
 871                 int rc = doVCCommand("cvs -q commit -m \"" + msg + "\" "
 872                         + getTarget(File),
 873                     FileName(owner_->filePath()));
 874                 if (rc)
 875                         return LyXVC::ErrorCommand;
 876                 log = "CVS: Proceeded";
 877                 return LyXVC::VCSuccess;
 878         }
 879         case NeedsMerge:
 880         case NeedsCheckout:
 881                 frontend::Alert::error(_("Revision control error."),
 882                         _("The repository version is newer then the current check out.\n"
 883                           "You have to update from repository first or revert your changes.")) ;
 884                 break;
 885         default:
 886                 frontend::Alert::error(_("Revision control error."),
 887                         bformat(_("Bad status when checking in changes.\n"
 888                                           "\n'%1$s'\n\n"),
 889                                 toString(status)));
 890                 break;
 891         }
 892         return LyXVC::ErrorBefore;
 893 }
 894
 895
 896 bool CVS::isLocked() const
 897 {
 898         FileName fn(owner_->absFileName());
 899         fn.refresh();
 900         return !fn.isReadOnly();
 901 }
 902
 903
 904 bool CVS::checkInEnabled()
 905 {
 906         if (vcstatus_ != NOLOCKING)
 907                 return isLocked();
 908         else
 909                 return true;
 910 }
 911
 912
 913 bool CVS::isCheckInWithConfirmation()
 914 {
 915         CvsStatus status = getStatus();
 916         return status == LocallyModified || status == LocallyAdded;
 917 }
 918
 919
 920 string CVS::checkOut()
 921 {
 922         if (vcstatus_ != NOLOCKING && edit())
 923                 return string();
 924         TempFile tempfile("lyxvout");
 925         FileName tmpf = tempfile.name();
 926         if (tmpf.empty()) {
 927                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 928                 return string();
 929         }
 930
 931         int rc = update(File, tmpf);
 932         string log;
 933         string const res = scanLogFile(tmpf, log);
 934         if (!res.empty()) {
 935                 frontend::Alert::error(_("Revision control error."),
 936                         bformat(_("Error when updating from repository.\n"
 937                                 "You have to manually resolve the conflicts NOW!\n'%1$s'.\n\n"
 938                                 "After pressing OK, LyX will try to reopen the resolved document."),
 939                                 from_local8bit(res)));
 940                 rc = 0;
 941         }
 942
 943         return rc ? string() : log.empty() ? "CVS: Proceeded" : "CVS: " + log;
 944 }
 945
 946
 947 bool CVS::checkOutEnabled()
 948 {
 949         if (vcstatus_ != NOLOCKING)
 950                 return !isLocked();
 951         else
 952                 return true;
 953 }
 954
 955
 956 string CVS::repoUpdate()
 957 {
 958         TempFile tempfile("lyxvout");
 959         FileName tmpf = tempfile.name();
 960         if (tmpf.empty()) {
 961                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 962                 return string();
 963         }
 964
 965         getDiff(Directory, tmpf);
 966         docstring res = tmpf.fileContents("UTF-8");
 967         if (!res.empty()) {
 968                 LYXERR(Debug::LYXVC, "Diff detected:\n" << res);
 969                 docstring const file = from_utf8(owner_->filePath());
 970                 docstring text = bformat(_("There were detected changes "
 971                                 "in the working directory:\n%1$s\n\n"
 972                                 "Possible file conflicts must be then resolved manually "
 973                                 "or you will need to revert back to the repository version."), file);
 974                 int ret = frontend::Alert::prompt(_("Changes detected"),
 975                                 text, 0, 1, _("&Continue"), _("&Abort"), _("View &Log ..."));
 976                 if (ret == 2) {
 977                         dispatch(FuncRequest(LFUN_DIALOG_SHOW, "file " + tmpf.absFileName()));
 978                         ret = frontend::Alert::prompt(_("Changes detected"),
 979                                 text, 0, 1, _("&Continue"), _("&Abort"));
 980                         hideDialogs("file", nullptr);
 981                 }
 982                 if (ret == 1)
 983                         return string();
 984         }
 985
 986         int rc = update(Directory, tmpf);
 987         res += "Update log:\n" + tmpf.fileContents("UTF-8");
 988         LYXERR(Debug::LYXVC, res);
 989
 990         string log;
 991         string sres = scanLogFile(tmpf, log);
 992         if (!sres.empty()) {
 993                 docstring const file = owner_->fileName().displayName(20);
 994                 frontend::Alert::error(_("Revision control error."),
 995                         bformat(_("Error when updating document %1$s from repository.\n"
 996                                           "You have to manually resolve the conflicts NOW!\n'%2$s'.\n\n"
 997                                           "After pressing OK, LyX will try to reopen the resolved document."),
 998                                 file, from_local8bit(sres)));
 999                 rc = 0;
1000         }
1001
1002         return rc ? string() : log.empty() ? "CVS: Proceeded" : "CVS: " + log;
1003 }
1004
1005
1006 bool CVS::repoUpdateEnabled()
1007 {
1008         return true;
1009 }
1010
1011
1012 string CVS::lockingToggle()
1013 {
1014         lyxerr << "Sorry, not implemented." << endl;
1015         return string();
1016 }
1017
1018
1019 bool CVS::lockingToggleEnabled()
1020 {
1021         return false;
1022 }
1023
1024
1025 bool CVS::isRevertWithConfirmation()
1026 {
1027         CvsStatus status = getStatus();
1028         return !owner_->isClean() || status == LocallyModified || status == NeedsMerge;
1029 }
1030
1031
1032 bool CVS::revert()
1033 {
1034         // Reverts to the version in CVS repository and
1035         // gets the updated version from the repository.
1036         CvsStatus status = getStatus();
1037         switch (status) {
1038         case UpToDate:
1039                 if (vcstatus_ != NOLOCKING)
1040                         return 0 == unedit();
1041                 break;
1042         case NeedsMerge:
1043         case NeedsCheckout:
1044         case LocallyModified: {
1045                 FileName f(owner_->absFileName());
1046                 f.removeFile();
1047                 update(File, FileName());
1048                 owner_->markClean();
1049                 break;
1050         }
1051         case LocallyAdded: {
1052                 docstring const file = owner_->fileName().displayName(20);
1053                 frontend::Alert::error(_("Revision control error."),
1054                         bformat(_("The document %1$s is not in repository.\n"
1055                                   "You have to check in the first revision before you can revert."),
1056                                 file)) ;
1057                 return false;
1058         }
1059         default: {
1060                 docstring const file = owner_->fileName().displayName(20);
1061                 frontend::Alert::error(_("Revision control error."),
1062                         bformat(_("Cannot revert document %1$s to repository version.\n"
1063                                   "The status '%2$s' is unexpected."),
1064                                 file, toString(status)));
1065                 return false;
1066                 }
1067         }
1068         return true;
1069 }
1070
1071
1072 void CVS::undoLast()
1073 {
1074         // merge the current with the previous version
1075         // in a reverse patch kind of way, so that the
1076         // result is to revert the last changes.
1077         lyxerr << "Sorry, not implemented." << endl;
1078 }
1079
1080
1081 bool CVS::undoLastEnabled()
1082 {
1083         return false;
1084 }
1085
1086
1087 void CVS::getLog(FileName const & tmpf)
1088 {
1089         doVCCommandWithOutput("cvs log " + getTarget(File),
1090                 FileName(owner_->filePath()),
1091                 tmpf);
1092 }
1093
1094
1095 bool CVS::toggleReadOnlyEnabled()
1096 {
1097         return false;
1098 }
1099
1100
1101 string CVS::revisionInfo(LyXVC::RevisionInfo const info)
1102 {
1103         if (!version_.empty()) {
1104                 getRevisionInfo();
1105                 switch (info) {
1106                 case LyXVC::File:
1107                         return version_;
1108                 case LyXVC::Author:
1109                         return rev_author_cache_;
1110                 case LyXVC::Date:
1111                         return rev_date_cache_;
1112                 case LyXVC::Time:
1113                         return rev_time_cache_;
1114                 default:
1115                         break;
1116                 }
1117         }
1118         return string();
1119 }
1120
1121
1122 bool CVS::prepareFileRevision(string const & revis, string & f)
1123 {
1124         string rev = revis;
1125         if (!VCS::makeRCSRevision(version_, rev))
1126                 return false;
1127
1128         TempFile tempfile("lyxvcrev_" + rev + '_');
1129         tempfile.setAutoRemove(false);
1130         FileName tmpf = tempfile.name();
1131         if (tmpf.empty()) {
1132                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1133                 return false;
1134         }
1135
1136         doVCCommandWithOutput("cvs update -p -r" + rev + ' '
1137                 + getTarget(File),
1138                 FileName(owner_->filePath()), tmpf);
1139         tmpf.refresh();
1140         if (tmpf.isFileEmpty())
1141                 return false;
1142
1143         f = tmpf.absFileName();
1144         return true;
1145 }
1146
1147
1148 bool CVS::prepareFileRevisionEnabled()
1149 {
1150         return true;
1151 }
1152
1153
1154 /////////////////////////////////////////////////////////////////////
1155 //
1156 // SVN
1157 //
1158 /////////////////////////////////////////////////////////////////////
1159
1160 SVN::SVN(FileName const & m, Buffer * b) : VCS(b)
1161 {
1162         // Here we know that the buffer file is either already in SVN or
1163         // about to be registered
1164         master_ = m;
1165         locked_mode_ = false;
1166         scanMaster();
1167 }
1168
1169
1170 FileName const SVN::findFile(FileName const & file)
1171 {
1172         // First we check the existence of repository meta data.
1173         if (VCS::checkParentDirs(file, ".svn").empty()) {
1174                 LYXERR(Debug::LYXVC, "Cannot find SVN meta data for " << file);
1175                 return FileName();
1176         }
1177
1178         // Now we check the status of the file.
1179         string const fname = onlyFileName(file.absFileName());
1180         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under svn control for `" << fname << '\'');
1181         bool found = 0 == doVCCommandCall("svn info " + quoteName(fname),
1182                                                 file.onlyPath());
1183         LYXERR(Debug::LYXVC, "SVN control: " << (found ? "enabled" : "disabled"));
1184         return found ? file : FileName();
1185 }
1186
1187
1188 void SVN::scanMaster()
1189 {
1190         // vcstatus code is somewhat superflous,
1191         // until we want to implement read-only toggle for svn.
1192         vcstatus_ = NOLOCKING;
1193         if (checkLockMode()) {
1194                 if (isLocked())
1195                         vcstatus_ = LOCKED;
1196                 else
1197                         vcstatus_ = UNLOCKED;
1198         }
1199 }
1200
1201
1202 bool SVN::checkLockMode()
1203 {
1204         TempFile tempfile("lyxvcout");
1205         FileName tmpf = tempfile.name();
1206         if (tmpf.empty()){
1207                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1208                 return false;
1209         }
1210
1211         LYXERR(Debug::LYXVC, "Detecting locking mode...");
1212         if (doVCCommandCall("svn proplist " + quoteName(onlyFileName(owner_->absFileName()))
1213                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1214                     FileName(owner_->filePath())))
1215                 return false;
1216
1217         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
1218         string line;
1219         bool ret = false;
1220
1221         while (ifs && !ret) {
1222                 getline(ifs, line);
1223                 LYXERR(Debug::LYXVC, line);
1224                 if (contains(line, "svn:needs-lock"))
1225                         ret = true;
1226         }
1227         LYXERR(Debug::LYXVC, "Locking enabled: " << ret);
1228         ifs.close();
1229         locked_mode_ = ret;
1230         return ret;
1231
1232 }
1233
1234
1235 bool SVN::isLocked() const
1236 {
1237         FileName file(owner_->absFileName());
1238         file.refresh();
1239         return !file.isReadOnly();
1240 }
1241
1242
1243 bool SVN::retrieve(FileName const & file)
1244 {
1245         LYXERR(Debug::LYXVC, "LyXVC::SVN: retrieve.\n\t" << file);
1246         // The caller ensures that file does not exist, so no need to check that.
1247         return doVCCommandCall("svn update -q --non-interactive " + quoteName(file.onlyFileName()),
1248                                file.onlyPath()) == 0;
1249 }
1250
1251
1252 void SVN::registrer(string const & /*msg*/)
1253 {
1254         doVCCommand("svn add -q " + quoteName(onlyFileName(owner_->absFileName())),
1255                     FileName(owner_->filePath()));
1256 }
1257
1258
1259 bool SVN::renameEnabled()
1260 {
1261         return true;
1262 }
1263
1264
1265 string SVN::rename(support::FileName const & newFile, string const & msg)
1266 {
1267         // svn move does not require a log message, since it does not commit.
1268         // In LyX we commit immediately afterwards, otherwise it could be
1269         // confusing to the user to have two uncommitted files.
1270         FileName path(owner_->filePath());
1271         string relFile(to_utf8(newFile.relPath(path.absFileName())));
1272         string cmd("svn move -q " + quoteName(onlyFileName(owner_->absFileName())) +
1273                    ' ' + quoteName(relFile));
1274         if (doVCCommand(cmd, path)) {
1275                 cmd = "svn revert -q " +
1276                         quoteName(onlyFileName(owner_->absFileName())) + ' ' +
1277                         quoteName(relFile);
1278                 doVCCommand(cmd, path);
1279                 if (newFile.exists())
1280                         newFile.removeFile();
1281                 return string();
1282         }
1283         vector<support::FileName> f;
1284         f.push_back(owner_->fileName());
1285         f.push_back(newFile);
1286         string log;
1287         if (checkIn(f, msg, log) != LyXVC::VCSuccess) {
1288                 cmd = "svn revert -q " +
1289                         quoteName(onlyFileName(owner_->absFileName())) + ' ' +
1290                         quoteName(relFile);
1291                 doVCCommand(cmd, path);
1292                 if (newFile.exists())
1293                         newFile.removeFile();
1294                 return string();
1295         }
1296         return log;
1297 }
1298
1299
1300 bool SVN::copyEnabled()
1301 {
1302         return true;
1303 }
1304
1305
1306 string SVN::copy(support::FileName const & newFile, string const & msg)
1307 {
1308         // svn copy does not require a log message, since it does not commit.
1309         // In LyX we commit immediately afterwards, otherwise it could be
1310         // confusing to the user to have an uncommitted file.
1311         FileName path(owner_->filePath());
1312         string relFile(to_utf8(newFile.relPath(path.absFileName())));
1313         string cmd("svn copy -q " + quoteName(onlyFileName(owner_->absFileName())) +
1314                    ' ' + quoteName(relFile));
1315         if (doVCCommand(cmd, path))
1316                 return string();
1317         vector<support::FileName> f(1, newFile);
1318         string log;
1319         if (checkIn(f, msg, log) == LyXVC::VCSuccess)
1320                 return log;
1321         return string();
1322 }
1323
1324
1325 LyXVC::CommandResult SVN::checkIn(string const & msg, string & log)
1326 {
1327         vector<support::FileName> f(1, owner_->fileName());
1328         return checkIn(f, msg, log);
1329 }
1330
1331
1332 LyXVC::CommandResult
1333 SVN::checkIn(vector<support::FileName> const & f, string const & msg, string & log)
1334 {
1335         TempFile tempfile("lyxvcout");
1336         FileName tmpf = tempfile.name();
1337         if (tmpf.empty()){
1338                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1339                 log = N_("Error: Could not generate logfile.");
1340                 return LyXVC::ErrorBefore;
1341         }
1342
1343         ostringstream os;
1344         os << "svn commit -m \"" << msg << '"';
1345         for (size_t i = 0; i < f.size(); ++i)
1346                 os << ' ' << quoteName(f[i].onlyFileName());
1347         os << " > " << quoteName(tmpf.toFilesystemEncoding());
1348         LyXVC::CommandResult ret =
1349                 doVCCommand(os.str(), FileName(owner_->filePath())) ?
1350                         LyXVC::ErrorCommand : LyXVC::VCSuccess;
1351
1352         string res = scanLogFile(tmpf, log);
1353         if (!res.empty()) {
1354                 frontend::Alert::error(_("Revision control error."),
1355                                 _("Error when committing to repository.\n"
1356                                 "You have to manually resolve the problem.\n"
1357                                 "LyX will reopen the document after you press OK."));
1358                 ret = LyXVC::ErrorCommand;
1359         }
1360         else
1361                 if (!fileLock(false, tmpf, log))
1362                         ret = LyXVC::ErrorCommand;
1363
1364         if (!log.empty())
1365                 log.insert(0, "SVN: ");
1366         if (ret == LyXVC::VCSuccess && log.empty())
1367                 log = "SVN: Proceeded";
1368         return ret;
1369 }
1370
1371
1372 bool SVN::checkInEnabled()
1373 {
1374         if (locked_mode_)
1375                 return isLocked();
1376         else
1377                 return true;
1378 }
1379
1380
1381 bool SVN::isCheckInWithConfirmation()
1382 {
1383         // FIXME one day common getDiff and perhaps OpMode for all backends
1384
1385         TempFile tempfile("lyxvcout");
1386         FileName tmpf = tempfile.name();
1387         if (tmpf.empty()) {
1388                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1389                 return true;
1390         }
1391
1392         doVCCommandCall("svn diff " + quoteName(owner_->absFileName())
1393                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1394                 FileName(owner_->filePath()));
1395
1396         docstring diff = tmpf.fileContents("UTF-8");
1397
1398         if (diff.empty())
1399                 return false;
1400
1401         return true;
1402 }
1403
1404
1405 // FIXME Correctly return code should be checked instead of this.
1406 // This would need another solution than just plain startscript.
1407 // Hint from Andre': QProcess::readAllStandardError()...
1408 string SVN::scanLogFile(FileName const & f, string & status)
1409 {
1410         ifstream ifs(f.toFilesystemEncoding().c_str());
1411         string line;
1412
1413         while (ifs) {
1414                 getline(ifs, line);
1415                 LYXERR(Debug::LYXVC, line << '\n');
1416                 if (!line.empty())
1417                         status += line + "; ";
1418                 if (prefixIs(line, "C ") || prefixIs(line, "CU ")
1419                                          || contains(line, "Commit failed")) {
1420                         ifs.close();
1421                         return line;
1422                 }
1423                 if (contains(line, "svn:needs-lock")) {
1424                         ifs.close();
1425                         return line;
1426                 }
1427         }
1428         ifs.close();
1429         return string();
1430 }
1431
1432
1433 bool SVN::fileLock(bool lock, FileName const & tmpf, string &status)
1434 {
1435         if (!locked_mode_ || (isLocked() == lock))
1436                 return true;
1437
1438         string const arg = lock ? "lock " : "unlock ";
1439         doVCCommand("svn "+ arg + quoteName(onlyFileName(owner_->absFileName()))
1440                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1441                     FileName(owner_->filePath()));
1442
1443         // Lock error messages go unfortunately on stderr and are unreachable this way.
1444         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
1445         string line;
1446         while (ifs) {
1447                 getline(ifs, line);
1448                 if (!line.empty()) status += line + "; ";
1449         }
1450         ifs.close();
1451
1452         if (isLocked() == lock)
1453                 return true;
1454
1455         if (lock)
1456                 frontend::Alert::error(_("Revision control error."),
1457                         _("Error while acquiring write lock.\n"
1458                         "Another user is most probably editing\n"
1459                         "the current document now!\n"
1460                         "Also check the access to the repository."));
1461         else
1462                 frontend::Alert::error(_("Revision control error."),
1463                         _("Error while releasing write lock.\n"
1464                         "Check the access to the repository."));
1465         return false;
1466 }
1467
1468
1469 string SVN::checkOut()
1470 {
1471         TempFile tempfile("lyxvcout");
1472         FileName tmpf = tempfile.name();
1473         if (tmpf.empty()) {
1474                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1475                 return N_("Error: Could not generate logfile.");
1476         }
1477
1478         doVCCommand("svn update --non-interactive " + quoteName(onlyFileName(owner_->absFileName()))
1479                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1480                     FileName(owner_->filePath()));
1481
1482         string log;
1483         string const res = scanLogFile(tmpf, log);
1484         if (!res.empty())
1485                 frontend::Alert::error(_("Revision control error."),
1486                         bformat(_("Error when updating from repository.\n"
1487                                 "You have to manually resolve the conflicts NOW!\n'%1$s'.\n\n"
1488                                 "After pressing OK, LyX will try to reopen the resolved document."),
1489                         from_local8bit(res)));
1490
1491         fileLock(true, tmpf, log);
1492
1493         return log.empty() ? string() : "SVN: " + log;
1494 }
1495
1496
1497 bool SVN::checkOutEnabled()
1498 {
1499         if (locked_mode_)
1500                 return !isLocked();
1501         else
1502                 return true;
1503 }
1504
1505
1506 string SVN::repoUpdate()
1507 {
1508         TempFile tempfile("lyxvcout");
1509         FileName tmpf = tempfile.name();
1510         if (tmpf.empty()) {
1511                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1512                 return N_("Error: Could not generate logfile.");
1513         }
1514
1515         doVCCommand("svn diff " + quoteName(owner_->filePath())
1516                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1517                 FileName(owner_->filePath()));
1518         docstring res = tmpf.fileContents("UTF-8");
1519         if (!res.empty()) {
1520                 LYXERR(Debug::LYXVC, "Diff detected:\n" << res);
1521                 docstring const file = from_utf8(owner_->filePath());
1522                 docstring text = bformat(_("There were detected changes "
1523                                 "in the working directory:\n%1$s\n\n"
1524                                 "In case of file conflict version of the local directory files "
1525                                 "will be preferred."
1526                                 "\n\nContinue?"), file);
1527                 int ret = frontend::Alert::prompt(_("Changes detected"),
1528                                 text, 0, 1, _("&Yes"), _("&No"), _("View &Log ..."));
1529                 if (ret == 2) {
1530                         dispatch(FuncRequest(LFUN_DIALOG_SHOW, "file " + tmpf.absFileName()));
1531                         ret = frontend::Alert::prompt(_("Changes detected"),
1532                                 text, 0, 1, _("&Yes"), _("&No"));
1533                         hideDialogs("file", nullptr);
1534                 }
1535                 if (ret == 1)
1536                         return string();
1537         }
1538
1539         // Reverting looks too harsh, see bug #6255.
1540         // doVCCommand("svn revert -R " + quoteName(owner_->filePath())
1541         // + " > " + quoteName(tmpf.toFilesystemEncoding()),
1542         // FileName(owner_->filePath()));
1543         // res = "Revert log:\n" + tmpf.fileContents("UTF-8");
1544         doVCCommand("svn update --accept mine-full " + quoteName(owner_->filePath())
1545                 + " > " + quoteName(tmpf.toFilesystemEncoding()),
1546                 FileName(owner_->filePath()));
1547         res += "Update log:\n" + tmpf.fileContents("UTF-8");
1548
1549         LYXERR(Debug::LYXVC, res);
1550         return to_utf8(res);
1551 }
1552
1553
1554 bool SVN::repoUpdateEnabled()
1555 {
1556         return true;
1557 }
1558
1559
1560 string SVN::lockingToggle()
1561 {
1562         TempFile tempfile("lyxvcout");
1563         FileName tmpf = tempfile.name();
1564         if (tmpf.empty()) {
1565                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1566                 return N_("Error: Could not generate logfile.");
1567         }
1568
1569         int ret = doVCCommand("svn proplist " + quoteName(onlyFileName(owner_->absFileName()))
1570                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1571                     FileName(owner_->filePath()));
1572         if (ret)
1573                 return string();
1574
1575         string log;
1576         string res = scanLogFile(tmpf, log);
1577         bool locking = contains(res, "svn:needs-lock");
1578         if (!locking)
1579                 ret = doVCCommand("svn propset svn:needs-lock ON "
1580                     + quoteName(onlyFileName(owner_->absFileName()))
1581                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1582                     FileName(owner_->filePath()));
1583         else
1584                 ret = doVCCommand("svn propdel svn:needs-lock "
1585                     + quoteName(onlyFileName(owner_->absFileName()))
1586                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1587                     FileName(owner_->filePath()));
1588         if (ret)
1589                 return string();
1590
1591         frontend::Alert::warning(_("SVN File Locking"),
1592                 (locking ? _("Locking property unset.") : _("Locking property set.")) + '\n'
1593                 + _("Do not forget to commit the locking property into the repository."),
1594                 true);
1595
1596         return string("SVN: ") + (locking ?
1597                 N_("Locking property unset.") : N_("Locking property set."));
1598 }
1599
1600
1601 bool SVN::lockingToggleEnabled()
1602 {
1603         return true;
1604 }
1605
1606
1607 bool SVN::revert()
1608 {
1609         // Reverts to the version in SVN repository and
1610         // gets the updated version from the repository.
1611         string const fil = quoteName(onlyFileName(owner_->absFileName()));
1612
1613         if (doVCCommand("svn revert -q " + fil,
1614                     FileName(owner_->filePath())))
1615                 return false;
1616         owner_->markClean();
1617         return true;
1618 }
1619
1620
1621 bool SVN::isRevertWithConfirmation()
1622 {
1623         //FIXME owner && diff
1624         return true;
1625 }
1626
1627
1628 void SVN::undoLast()
1629 {
1630         // merge the current with the previous version
1631         // in a reverse patch kind of way, so that the
1632         // result is to revert the last changes.
1633         lyxerr << "Sorry, not implemented." << endl;
1634 }
1635
1636
1637 bool SVN::undoLastEnabled()
1638 {
1639         return false;
1640 }
1641
1642
1643 string SVN::revisionInfo(LyXVC::RevisionInfo const info)
1644 {
1645         if (info == LyXVC::Tree) {
1646                 if (rev_tree_cache_.empty())
1647                         if (!getTreeRevisionInfo())
1648                                 rev_tree_cache_ = "?";
1649                 if (rev_tree_cache_ == "?")
1650                         return string();
1651
1652                 return rev_tree_cache_;
1653         }
1654
1655         // fill the rest of the attributes for a single file
1656         if (rev_file_cache_.empty())
1657                 if (!getFileRevisionInfo())
1658                         rev_file_cache_ = "?";
1659
1660         switch (info) {
1661                 case LyXVC::File:
1662                         if (rev_file_cache_ == "?")
1663                                 return string();
1664                         return rev_file_cache_;
1665                 case LyXVC::Author:
1666                         return rev_author_cache_;
1667                 case LyXVC::Date:
1668                         return rev_date_cache_;
1669                 case LyXVC::Time:
1670                         return rev_time_cache_;
1671                 default:
1672                         break;
1673         }
1674
1675         return string();
1676 }
1677
1678
1679 bool SVN::getFileRevisionInfo()
1680 {
1681         TempFile tempfile("lyxvcout");
1682         FileName tmpf = tempfile.name();
1683         if (tmpf.empty()) {
1684                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1685                 return false;
1686         }
1687
1688         doVCCommand("svn info --xml " + quoteName(onlyFileName(owner_->absFileName()))
1689                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1690                     FileName(owner_->filePath()));
1691
1692         if (tmpf.empty())
1693                 return false;
1694
1695         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
1696         string line;
1697         // commit log part
1698         bool c = false;
1699         string rev;
1700
1701         while (ifs) {
1702                 getline(ifs, line);
1703                 LYXERR(Debug::LYXVC, line);
1704                 if (prefixIs(line, "<commit"))
1705                         c = true;
1706                 if (c && prefixIs(line, "   revision=\"") && suffixIs(line, "\">")) {
1707                         string l1 = subst(line, "revision=\"", "");
1708                         string l2 = trim(subst(l1, "\">", ""));
1709                         if (isStrInt(l2))
1710                                 rev_file_cache_ = rev = l2;
1711                 }
1712                 if (c && prefixIs(line, "<author>") && suffixIs(line, "</author>")) {
1713                         string l1 = subst(line, "<author>", "");
1714                         string l2 = subst(l1, "</author>", "");
1715                         rev_author_cache_ = l2;
1716                 }
1717                 if (c && prefixIs(line, "<date>") && suffixIs(line, "</date>")) {
1718                         string l1 = subst(line, "<date>", "");
1719                         string l2 = subst(l1, "</date>", "");
1720                         l2 = split(l2, l1, 'T');
1721                         rev_date_cache_ = l1;
1722                         l2 = split(l2, l1, '.');
1723                         rev_time_cache_ = l1;
1724                 }
1725         }
1726
1727         ifs.close();
1728         return !rev.empty();
1729 }
1730
1731
1732 bool SVN::getTreeRevisionInfo()
1733 {
1734         TempFile tempfile("lyxvcout");
1735         FileName tmpf = tempfile.name();
1736         if (tmpf.empty()) {
1737                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1738                 return false;
1739         }
1740
1741         doVCCommand("svnversion -n . > " + quoteName(tmpf.toFilesystemEncoding()),
1742                     FileName(owner_->filePath()));
1743
1744         if (tmpf.empty())
1745                 return false;
1746
1747         // only first line in case something bad happens.
1748         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
1749         string line;
1750         getline(ifs, line);
1751         ifs.close();
1752
1753         rev_tree_cache_ = line;
1754         return !line.empty();
1755 }
1756
1757
1758 void SVN::getLog(FileName const & tmpf)
1759 {
1760         doVCCommand("svn log " + quoteName(onlyFileName(owner_->absFileName()))
1761                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1762                     FileName(owner_->filePath()));
1763 }
1764
1765
1766 bool SVN::prepareFileRevision(string const & revis, string & f)
1767 {
1768         if (!isStrInt(revis))
1769                 return false;
1770
1771         int rev = convert<int>(revis);
1772         if (rev <= 0)
1773                 if (!getFileRevisionInfo())
1774                         return false;
1775         if (rev == 0)
1776                 rev = convert<int>(rev_file_cache_);
1777         // go back for minus rev
1778         else if (rev < 0) {
1779                 rev = rev + convert<int>(rev_file_cache_);
1780                 if (rev < 1)
1781                         return false;
1782         }
1783
1784         string revname = convert<string>(rev);
1785         TempFile tempfile("lyxvcrev_" + revname + '_');
1786         tempfile.setAutoRemove(false);
1787         FileName tmpf = tempfile.name();
1788         if (tmpf.empty()) {
1789                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1790                 return false;
1791         }
1792
1793         doVCCommand("svn cat -r " + revname + ' '
1794                       + quoteName(onlyFileName(owner_->absFileName()))
1795                       + " > " + quoteName(tmpf.toFilesystemEncoding()),
1796                 FileName(owner_->filePath()));
1797         tmpf.refresh();
1798         if (tmpf.isFileEmpty())
1799                 return false;
1800
1801         f = tmpf.absFileName();
1802         return true;
1803 }
1804
1805
1806 bool SVN::prepareFileRevisionEnabled()
1807 {
1808         return true;
1809 }
1810
1811
1812
1813 bool SVN::toggleReadOnlyEnabled()
1814 {
1815         return false;
1816 }
1817
1818
1819 /////////////////////////////////////////////////////////////////////
1820 //
1821 // GIT
1822 //
1823 /////////////////////////////////////////////////////////////////////
1824
1825 GIT::GIT(FileName const & m, Buffer * b) : VCS(b)
1826 {
1827         // Here we know that the buffer file is either already in GIT or
1828         // about to be registered
1829         master_ = m;
1830         scanMaster();
1831 }
1832
1833
1834 FileName const GIT::findFile(FileName const & file)
1835 {
1836         // First we check the existence of repository meta data.
1837         if (VCS::checkParentDirs(file, ".git").empty()) {
1838                 LYXERR(Debug::LYXVC, "Cannot find GIT meta data for " << file);
1839                 return FileName();
1840         }
1841
1842         // Now we check the status of the file.
1843         TempFile tempfile("lyxvcout");
1844         FileName tmpf = tempfile.name();
1845         if (tmpf.empty()) {
1846                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1847                 return FileName();
1848         }
1849
1850         string const fname = onlyFileName(file.absFileName());
1851         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under git control for `"
1852                         << fname << '\'');
1853         doVCCommandCall("git ls-files " +
1854                         quoteName(fname) + " > " +
1855                         quoteName(tmpf.toFilesystemEncoding()),
1856                         file.onlyPath());
1857         tmpf.refresh();
1858         bool found = !tmpf.isFileEmpty();
1859         LYXERR(Debug::LYXVC, "GIT control: " << (found ? "enabled" : "disabled"));
1860         return found ? file : FileName();
1861 }
1862
1863
1864 void GIT::scanMaster()
1865 {
1866         // vcstatus code is somewhat superflous,
1867         // until we want to implement read-only toggle for git.
1868         vcstatus_ = NOLOCKING;
1869 }
1870
1871
1872 bool GIT::retrieve(FileName const & file)
1873 {
1874         LYXERR(Debug::LYXVC, "LyXVC::GIT: retrieve.\n\t" << file);
1875         // The caller ensures that file does not exist, so no need to check that.
1876         return doVCCommandCall("git checkout -q " + quoteName(file.onlyFileName()),
1877                                file.onlyPath()) == 0;
1878 }
1879
1880
1881 void GIT::registrer(string const & /*msg*/)
1882 {
1883         doVCCommand("git add " + quoteName(onlyFileName(owner_->absFileName())),
1884                     FileName(owner_->filePath()));
1885 }
1886
1887
1888 bool GIT::renameEnabled()
1889 {
1890         return true;
1891 }
1892
1893
1894 string GIT::rename(support::FileName const & newFile, string const & msg)
1895 {
1896         // git mv does not require a log message, since it does not commit.
1897         // In LyX we commit immediately afterwards, otherwise it could be
1898         // confusing to the user to have two uncommitted files.
1899         FileName path(owner_->filePath());
1900         string relFile(to_utf8(newFile.relPath(path.absFileName())));
1901         string cmd("git mv " + quoteName(onlyFileName(owner_->absFileName())) +
1902                    ' ' + quoteName(relFile));
1903         if (doVCCommand(cmd, path)) {
1904                 cmd = "git checkout -q " +
1905                         quoteName(onlyFileName(owner_->absFileName())) + ' ' +
1906                         quoteName(relFile);
1907                 doVCCommand(cmd, path);
1908                 if (newFile.exists())
1909                         newFile.removeFile();
1910                 return string();
1911         }
1912         vector<support::FileName> f;
1913         f.push_back(owner_->fileName());
1914         f.push_back(newFile);
1915         string log;
1916         if (checkIn(f, msg, log) != LyXVC::VCSuccess) {
1917                 cmd = "git checkout -q " +
1918                         quoteName(onlyFileName(owner_->absFileName())) + ' ' +
1919                         quoteName(relFile);
1920                 doVCCommand(cmd, path);
1921                 if (newFile.exists())
1922                         newFile.removeFile();
1923                 return string();
1924         }
1925         return log;
1926 }
1927
1928
1929 bool GIT::copyEnabled()
1930 {
1931         return false;
1932 }
1933
1934
1935 string GIT::copy(support::FileName const & /*newFile*/, string const & /*msg*/)
1936 {
1937         // git does not support copy with history preservation
1938         return string();
1939 }
1940
1941
1942 LyXVC::CommandResult GIT::checkIn(string const & msg, string & log)
1943 {
1944         vector<support::FileName> f(1, owner_->fileName());
1945         return checkIn(f, msg, log);
1946 }
1947
1948
1949 LyXVC::CommandResult
1950 GIT::checkIn(vector<support::FileName> const & f, string const & msg, string & log)
1951 {
1952         TempFile tempfile("lyxvcout");
1953         FileName tmpf = tempfile.name();
1954         if (tmpf.empty()){
1955                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1956                 log = N_("Error: Could not generate logfile.");
1957                 return LyXVC::ErrorBefore;
1958         }
1959
1960         ostringstream os;
1961         os << "git commit -m \"" << msg << '"';
1962         for (size_t i = 0; i < f.size(); ++i)
1963                 os << ' ' << quoteName(f[i].onlyFileName());
1964         os << " > " << quoteName(tmpf.toFilesystemEncoding());
1965         LyXVC::CommandResult ret =
1966                 doVCCommand(os.str(), FileName(owner_->filePath())) ?
1967                         LyXVC::ErrorCommand : LyXVC::VCSuccess;
1968
1969         string res = scanLogFile(tmpf, log);
1970         if (!res.empty()) {
1971                 frontend::Alert::error(_("Revision control error."),
1972                                 _("Error when committing to repository.\n"
1973                                 "You have to manually resolve the problem.\n"
1974                                 "LyX will reopen the document after you press OK."));
1975                 ret = LyXVC::ErrorCommand;
1976         }
1977
1978         if (!log.empty())
1979                 log.insert(0, "GIT: ");
1980         if (ret == LyXVC::VCSuccess && log.empty())
1981                 log = "GIT: Proceeded";
1982         return ret;
1983 }
1984
1985
1986 bool GIT::checkInEnabled()
1987 {
1988         return true;
1989 }
1990
1991
1992 bool GIT::isCheckInWithConfirmation()
1993 {
1994         // FIXME one day common getDiff and perhaps OpMode for all backends
1995
1996         TempFile tempfile("lyxvcout");
1997         FileName tmpf = tempfile.name();
1998         if (tmpf.empty()) {
1999                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
2000                 return true;
2001         }
2002
2003         doVCCommandCall("git diff " + quoteName(owner_->absFileName())
2004                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
2005                 FileName(owner_->filePath()));
2006
2007         docstring diff = tmpf.fileContents("UTF-8");
2008
2009         if (diff.empty())
2010                 return false;
2011
2012         return true;
2013 }
2014
2015
2016 // FIXME Correctly return code should be checked instead of this.
2017 // This would need another solution than just plain startscript.
2018 // Hint from Andre': QProcess::readAllStandardError()...
2019 string GIT::scanLogFile(FileName const & f, string & status)
2020 {
2021         ifstream ifs(f.toFilesystemEncoding().c_str());
2022         string line;
2023
2024         while (ifs) {
2025                 getline(ifs, line);
2026                 LYXERR(Debug::LYXVC, line << "\n");
2027                 if (!line.empty())
2028                         status += line + "; ";
2029                 if (prefixIs(line, "C ") || prefixIs(line, "CU ")
2030                                          || contains(line, "Commit failed")) {
2031                         ifs.close();
2032                         return line;
2033                 }
2034         }
2035         ifs.close();
2036         return string();
2037 }
2038
2039
2040 string GIT::checkOut()
2041 {
2042         return string();
2043 }
2044
2045
2046 bool GIT::checkOutEnabled()
2047 {
2048         return false;
2049 }
2050
2051
2052 string GIT::repoUpdate()
2053 {
2054         return string();
2055 }
2056
2057
2058 bool GIT::repoUpdateEnabled()
2059 {
2060         return false;
2061 }
2062
2063
2064 string GIT::lockingToggle()
2065 {
2066         return string();
2067 }
2068
2069
2070 bool GIT::lockingToggleEnabled()
2071 {
2072         return false;
2073 }
2074
2075
2076 bool GIT::revert()
2077 {
2078         // Reverts to the version in GIT repository and
2079         // gets the updated version from the repository.
2080         string const fil = quoteName(onlyFileName(owner_->absFileName()));
2081
2082         if (doVCCommand("git checkout -q " + fil,
2083                     FileName(owner_->filePath())))
2084                 return false;
2085         owner_->markClean();
2086         return true;
2087 }
2088
2089
2090 bool GIT::isRevertWithConfirmation()
2091 {
2092         //FIXME owner && diff
2093         return true;
2094 }
2095
2096
2097 void GIT::undoLast()
2098 {
2099         // merge the current with the previous version
2100         // in a reverse patch kind of way, so that the
2101         // result is to revert the last changes.
2102         lyxerr << "Sorry, not implemented." << endl;
2103 }
2104
2105
2106 bool GIT::undoLastEnabled()
2107 {
2108         return false;
2109 }
2110
2111
2112 string GIT::revisionInfo(LyXVC::RevisionInfo const info)
2113 {
2114         if (info == LyXVC::Tree) {
2115                 if (rev_tree_cache_.empty())
2116                         if (!getTreeRevisionInfo())
2117                                 rev_tree_cache_ = "?";
2118                 if (rev_tree_cache_ == "?")
2119                         return string();
2120
2121                 return rev_tree_cache_;
2122         }
2123
2124         // fill the rest of the attributes for a single file
2125         if (rev_file_cache_.empty())
2126                 if (!getFileRevisionInfo()) {
2127                         rev_file_cache_ = "?";
2128                         rev_file_abbrev_cache_ = "?";
2129     }
2130
2131         switch (info) {
2132                 case LyXVC::File:
2133                         if (rev_file_cache_ == "?")
2134                                 return string();
2135                         return rev_file_cache_;
2136                 case LyXVC::FileAbbrev:
2137                         if (rev_file_abbrev_cache_ == "?")
2138                                 return string();
2139                         return rev_file_abbrev_cache_;
2140                 case LyXVC::Author:
2141                         return rev_author_cache_;
2142                 case LyXVC::Date:
2143                         return rev_date_cache_;
2144                 case LyXVC::Time:
2145                         return rev_time_cache_;
2146                 default:
2147                         break;
2148         }
2149
2150         return string();
2151 }
2152
2153
2154 bool GIT::getFileRevisionInfo()
2155 {
2156         TempFile tempfile("lyxvcout");
2157         FileName tmpf = tempfile.name();
2158         if (tmpf.empty()) {
2159                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
2160                 return false;
2161         }
2162
2163         doVCCommand("git log -n 1 --pretty=format:%H%n%h%n%an%n%ai " + quoteName(onlyFileName(owner_->absFileName()))
2164                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
2165                     FileName(owner_->filePath()));
2166
2167         if (tmpf.empty())
2168                 return false;
2169
2170         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
2171
2172         if (ifs)
2173                 getline(ifs, rev_file_cache_);
2174         if (ifs)
2175                 getline(ifs, rev_file_abbrev_cache_);
2176         if (ifs)
2177                 getline(ifs, rev_author_cache_);
2178         if (ifs) {
2179                 string line;
2180                 getline(ifs, line);
2181                 rev_time_cache_ = split(line, rev_date_cache_, ' ');
2182         }
2183
2184         ifs.close();
2185         return !rev_file_cache_.empty();
2186 }
2187
2188
2189 bool GIT::getTreeRevisionInfo()
2190 {
2191         TempFile tempfile("lyxvcout");
2192         FileName tmpf = tempfile.name();
2193         if (tmpf.empty()) {
2194                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
2195                 return false;
2196         }
2197
2198         doVCCommand("git describe --abbrev --dirty --long > " + quoteName(tmpf.toFilesystemEncoding()),
2199                     FileName(owner_->filePath()),
2200                     false); //git describe returns $?=128 when no tag found (but git repo still exists)
2201
2202         if (tmpf.empty())
2203                 return false;
2204
2205         // only first line in case something bad happens.
2206         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
2207         getline(ifs, rev_tree_cache_);
2208         ifs.close();
2209
2210         return !rev_tree_cache_.empty();
2211 }
2212
2213
2214 void GIT::getLog(FileName const & tmpf)
2215 {
2216         doVCCommand("git log " + quoteName(onlyFileName(owner_->absFileName()))
2217                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
2218                     FileName(owner_->filePath()));
2219 }
2220
2221
2222 //at this moment we don't accept revision SHA, but just number of revision steps back
2223 //GUI and infrastucture needs to be changed first
2224 bool GIT::prepareFileRevision(string const & revis, string & f)
2225 {
2226         // anything positive means we got hash, not "0" or minus revision
2227         int rev = 1;
2228
2229         // hash is rarely number and should be long
2230         if (isStrInt(revis) && revis.length()<20)
2231                 rev = convert<int>(revis);
2232
2233         // revision and filename
2234         string pointer;
2235
2236         // go back for "minus" revisions
2237         if (rev <= 0)
2238                 pointer = "HEAD~" + convert<string>(-rev);
2239         // normal hash
2240         else
2241                 pointer = revis;
2242
2243         pointer += ':';
2244
2245         TempFile tempfile("lyxvcrev_" + revis + '_');
2246         tempfile.setAutoRemove(false);
2247         FileName tmpf = tempfile.name();
2248         if (tmpf.empty()) {
2249                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
2250                 return false;
2251         }
2252
2253         doVCCommand("git show " + pointer + "./"
2254                       + quoteName(onlyFileName(owner_->absFileName()))
2255                       + " > " + quoteName(tmpf.toFilesystemEncoding()),
2256                 FileName(owner_->filePath()));
2257         tmpf.refresh();
2258         if (tmpf.isFileEmpty())
2259                 return false;
2260
2261         f = tmpf.absFileName();
2262         return true;
2263 }
2264
2265
2266 bool GIT::prepareFileRevisionEnabled()
2267 {
2268         return true;
2269 }
2270
2271
2272 bool GIT::toggleReadOnlyEnabled()
2273 {
2274         return true;
2275 }
2276
2277
2278 } // namespace lyx