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