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