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 "DispatchResult.h"
  17 #include "LyX.h"
  18 #include "FuncRequest.h"
  19
  20 #include "frontends/alert.h"
  21 #include "frontends/Application.h"
  22
  23 #include "support/convert.h"
  24 #include "support/debug.h"
  25 #include "support/filetools.h"
  26 #include "support/gettext.h"
  27 #include "support/lstrings.h"
  28 #include "support/PathChanger.h"
  29 #include "support/Systemcall.h"
  30 #include "support/regex.h"
  31 #include "support/TempFile.h"
  32
  33 #include <fstream>
  34
  35 using namespace std;
  36 using namespace lyx::support;
  37
  38
  39 namespace lyx {
  40
  41
  42 int VCS::doVCCommandCall(string const & cmd, FileName const & path)
  43 {
  44         LYXERR(Debug::LYXVC, "doVCCommandCall: " << cmd);
  45         Systemcall one;
  46         support::PathChanger p(path);
  47         return one.startscript(Systemcall::Wait, cmd, string(), string(), false);
  48 }
  49
  50
  51 int VCS::doVCCommand(string const & cmd, FileName const & path, bool reportError)
  52 {
  53         if (owner_)
  54                 owner_->setBusy(true);
  55
  56         int const ret = doVCCommandCall(cmd, path);
  57
  58         if (owner_)
  59                 owner_->setBusy(false);
  60         if (ret && reportError)
  61                 frontend::Alert::error(_("Revision control error."),
  62                         bformat(_("Some problem occurred while running the command:\n"
  63                                   "'%1$s'."),
  64                         from_utf8(cmd)));
  65         return ret;
  66 }
  67
  68
  69 bool VCS::makeRCSRevision(string const &version, string &revis) const
  70 {
  71         string rev = revis;
  72
  73         if (isStrInt(rev)) {
  74                 int back = convert<int>(rev);
  75                 // if positive use as the last number in the whole revision string
  76                 if (back > 0) {
  77                         string base;
  78                         rsplit(version, base , '.');
  79                         rev = base + '.' + rev;
  80                 }
  81                 if (back == 0)
  82                         rev = version;
  83                 // we care about the last number from revision string
  84                 // in case of backward indexing
  85                 if (back < 0) {
  86                         string cur, base;
  87                         cur = rsplit(version, base , '.');
  88                         if (!isStrInt(cur))
  89                                 return false;
  90                         int want = convert<int>(cur) + back;
  91                         if (want <= 0)
  92                                 return false;
  93
  94                         rev = base + '.' + convert<string>(want);
  95                 }
  96         }
  97
  98         revis = rev;
  99         return true;
 100 }
 101
 102
 103 bool VCS::checkparentdirs(FileName const & file, std::string const & vcsdir)
 104 {
 105         FileName dirname = file.onlyPath();
 106         do {
 107                 FileName tocheck = FileName(addName(dirname.absFileName(), vcsdir));
 108                 LYXERR(Debug::LYXVC, "check file: " << tocheck.absFileName());
 109                 if (tocheck.exists())
 110                         return true;
 111                 //this construct because of #8295
 112                 dirname = FileName(dirname.absFileName()).parentPath();
 113         } while (!dirname.empty());
 114         return false;
 115 }
 116
 117
 118 /////////////////////////////////////////////////////////////////////
 119 //
 120 // RCS
 121 //
 122 /////////////////////////////////////////////////////////////////////
 123
 124 RCS::RCS(FileName const & m, Buffer * b) : VCS(b)
 125 {
 126         // Here we know that the buffer file is either already in RCS or
 127         // about to be registered
 128         master_ = m;
 129         scanMaster();
 130 }
 131
 132
 133 FileName const RCS::findFile(FileName const & file)
 134 {
 135         // Check if *,v exists.
 136         FileName tmp(file.absFileName() + ",v");
 137         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under rcs: " << tmp);
 138         if (tmp.isReadableFile()) {
 139                 LYXERR(Debug::LYXVC, "Yes, " << file << " is under rcs.");
 140                 return tmp;
 141         }
 142
 143         // Check if RCS/*,v exists.
 144         tmp = FileName(addName(addPath(onlyPath(file.absFileName()), "RCS"), file.absFileName()) + ",v");
 145         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under rcs: " << tmp);
 146         if (tmp.isReadableFile()) {
 147                 LYXERR(Debug::LYXVC, "Yes, " << file << " is under rcs.");
 148                 return tmp;
 149         }
 150
 151         return FileName();
 152 }
 153
 154
 155 bool RCS::retrieve(FileName const & file)
 156 {
 157         LYXERR(Debug::LYXVC, "LyXVC::RCS: retrieve.\n\t" << file);
 158         // The caller ensures that file does not exist, so no need to check that.
 159         return doVCCommandCall("co -q -r " + quoteName(file.toFilesystemEncoding()),
 160                                FileName()) == 0;
 161 }
 162
 163
 164 void RCS::scanMaster()
 165 {
 166         if (master_.empty())
 167                 return;
 168
 169         LYXERR(Debug::LYXVC, "LyXVC::RCS: scanMaster: " << master_);
 170
 171         ifstream ifs(master_.toFilesystemEncoding().c_str());
 172
 173         string token;
 174         bool read_enough = false;
 175
 176         while (!read_enough && ifs >> token) {
 177                 LYXERR(Debug::LYXVC, "LyXVC::scanMaster: current lex text: `"
 178                         << token << '\'');
 179
 180                 if (token.empty())
 181                         continue;
 182                 else if (token == "head") {
 183                         // get version here
 184                         string tmv;
 185                         ifs >> tmv;
 186                         tmv = rtrim(tmv, ";");
 187                         version_ = tmv;
 188                         LYXERR(Debug::LYXVC, "LyXVC: version found to be " << tmv);
 189                 } else if (contains(token, "access")
 190                            || contains(token, "symbols")
 191                            || contains(token, "strict")) {
 192                         // nothing
 193                 } else if (contains(token, "locks")) {
 194                         // get locker here
 195                         if (contains(token, ';')) {
 196                                 locker_ = "Unlocked";
 197                                 vcstatus = UNLOCKED;
 198                                 continue;
 199                         }
 200                         string tmpt;
 201                         string s1;
 202                         string s2;
 203                         do {
 204                                 ifs >> tmpt;
 205                                 s1 = rtrim(tmpt, ";");
 206                                 // tmp is now in the format <user>:<version>
 207                                 s1 = split(s1, s2, ':');
 208                                 // s2 is user, and s1 is version
 209                                 if (s1 == version_) {
 210                                         locker_ = s2;
 211                                         vcstatus = LOCKED;
 212                                         break;
 213                                 }
 214                         } while (!contains(tmpt, ';'));
 215
 216                 } else if (token == "comment") {
 217                         // we don't need to read any further than this.
 218                         read_enough = true;
 219                 } else {
 220                         // unexpected
 221                         LYXERR(Debug::LYXVC, "LyXVC::scanMaster(): unexpected token");
 222                 }
 223         }
 224 }
 225
 226
 227 void RCS::registrer(string const & msg)
 228 {
 229         string cmd = "ci -q -u -i -t-\"";
 230         cmd += msg;
 231         cmd += "\" ";
 232         cmd += quoteName(onlyFileName(owner_->absFileName()));
 233         doVCCommand(cmd, FileName(owner_->filePath()));
 234 }
 235
 236
 237 bool RCS::renameEnabled()
 238 {
 239         return false;
 240 }
 241
 242
 243 string RCS::rename(support::FileName const & /*newFile*/, string const & /*msg*/)
 244 {
 245         // not implemented, since a left-over file.lyx,v would be confusing.
 246         return string();
 247 }
 248
 249
 250 bool RCS::copyEnabled()
 251 {
 252         return true;
 253 }
 254
 255
 256 string RCS::copy(support::FileName const & newFile, string const & msg)
 257 {
 258         // RCS has no real copy command, so we create a poor mans version
 259         support::FileName const oldFile(owner_->absFileName());
 260         if (!oldFile.copyTo(newFile))
 261                 return string();
 262         FileName path(oldFile.onlyPath());
 263         string relFile(to_utf8(newFile.relPath(path.absFileName())));
 264         string cmd = "ci -q -u -i -t-\"";
 265         cmd += msg;
 266         cmd += "\" ";
 267         cmd += quoteName(relFile);
 268         return doVCCommand(cmd, path) ? string() : "RCS: Proceeded";
 269 }
 270
 271
 272 LyXVC::CommandResult RCS::checkIn(string const & msg, string & log)
 273 {
 274         int ret = doVCCommand("ci -q -u -m\"" + msg + "\" "
 275                     + quoteName(onlyFileName(owner_->absFileName())),
 276                     FileName(owner_->filePath()));
 277         if (ret)
 278                 return LyXVC::ErrorCommand;
 279         log = "RCS: Proceeded";
 280         return LyXVC::VCSuccess;
 281 }
 282
 283
 284 bool RCS::checkInEnabled()
 285 {
 286         return owner_ && !owner_->isReadonly();
 287 }
 288
 289
 290 bool RCS::isCheckInWithConfirmation()
 291 {
 292         // FIXME one day common getDiff for all backends
 293         // docstring diff;
 294         // if (getDiff(file, diff) && diff.empty())
 295         //      return false;
 296
 297         TempFile tempfile("lyxvcout");
 298         FileName tmpf = tempfile.name();
 299         if (tmpf.empty()) {
 300                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 301                 return true;
 302         }
 303
 304         doVCCommandCall("rcsdiff " + quoteName(owner_->absFileName())
 305                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
 306                 FileName(owner_->filePath()));
 307
 308         docstring diff = tmpf.fileContents("UTF-8");
 309
 310         if (diff.empty())
 311                 return false;
 312
 313         return true;
 314 }
 315
 316
 317 string RCS::checkOut()
 318 {
 319         owner_->markClean();
 320         int ret = doVCCommand("co -q -l " + quoteName(onlyFileName(owner_->absFileName())),
 321                     FileName(owner_->filePath()));
 322         return ret ? string() : "RCS: Proceeded";
 323 }
 324
 325
 326 bool RCS::checkOutEnabled()
 327 {
 328         return owner_ && owner_->isReadonly();
 329 }
 330
 331
 332 string RCS::repoUpdate()
 333 {
 334         lyxerr << "Sorry, not implemented." << endl;
 335         return string();
 336 }
 337
 338
 339 bool RCS::repoUpdateEnabled()
 340 {
 341         return false;
 342 }
 343
 344
 345 string RCS::lockingToggle()
 346 {
 347         //FIXME this might be actually possible, study rcs -U, rcs -L.
 348         //State should be easy to get inside scanMaster.
 349         //It would fix #4370 and make rcs/svn usage even more closer.
 350         lyxerr << "Sorry, not implemented." << endl;
 351         return string();
 352 }
 353
 354
 355 bool RCS::lockingToggleEnabled()
 356 {
 357         return false;
 358 }
 359
 360
 361 bool RCS::revert()
 362 {
 363         if (doVCCommand("co -f -u" + version_ + ' '
 364                     + quoteName(onlyFileName(owner_->absFileName())),
 365                     FileName(owner_->filePath())))
 366                 return false;
 367         // We ignore changes and just reload!
 368         owner_->markClean();
 369         return true;
 370 }
 371
 372
 373 bool RCS::isRevertWithConfirmation()
 374 {
 375         //FIXME owner && diff ?
 376         return true;
 377 }
 378
 379
 380 void RCS::undoLast()
 381 {
 382         LYXERR(Debug::LYXVC, "LyXVC: undoLast");
 383         doVCCommand("rcs -o" + version_ + ' '
 384                     + quoteName(onlyFileName(owner_->absFileName())),
 385                     FileName(owner_->filePath()));
 386 }
 387
 388
 389 bool RCS::undoLastEnabled()
 390 {
 391         return true;
 392 }
 393
 394
 395 void RCS::getLog(FileName const & tmpf)
 396 {
 397         doVCCommand("rlog " + quoteName(onlyFileName(owner_->absFileName()))
 398                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
 399                     FileName(owner_->filePath()));
 400 }
 401
 402
 403 bool RCS::toggleReadOnlyEnabled()
 404 {
 405         // This got broken somewhere along lfuns dispatch reorganization.
 406         // reloadBuffer would be needed after this, but thats problematic
 407         // since we are inside Buffer::dispatch.
 408         // return true;
 409         return false;
 410 }
 411
 412
 413 string RCS::revisionInfo(LyXVC::RevisionInfo const info)
 414 {
 415         if (info == LyXVC::File)
 416                 return version_;
 417         // fill the rest of the attributes for a single file
 418         if (rev_date_cache_.empty())
 419                 if (!getRevisionInfo())
 420                         return string();
 421
 422         switch (info) {
 423                 case LyXVC::Author:
 424                         return rev_author_cache_;
 425                 case LyXVC::Date:
 426                         return rev_date_cache_;
 427                 case LyXVC::Time:
 428                         return rev_time_cache_;
 429                 default: ;
 430         }
 431
 432         return string();
 433 }
 434
 435
 436 bool RCS::getRevisionInfo()
 437 {
 438         TempFile tempfile("lyxvcout");
 439         FileName tmpf = tempfile.name();
 440         if (tmpf.empty()) {
 441                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 442                 return false;
 443         }
 444         doVCCommand("rlog -r " + quoteName(onlyFileName(owner_->absFileName()))
 445                 + " > " + quoteName(tmpf.toFilesystemEncoding()),
 446                 FileName(owner_->filePath()));
 447
 448         if (tmpf.empty())
 449                 return false;
 450
 451         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
 452         string line;
 453
 454         // we reached to the entry, i.e. after initial log message
 455         bool entry=false;
 456         // line with critical info, e.g:
 457         //"date: 2011/07/02 11:02:54;  author: sanda;  state: Exp;  lines: +17 -2"
 458         string result;
 459
 460         while (ifs) {
 461                 getline(ifs, line);
 462                 LYXERR(Debug::LYXVC, line);
 463                 if (entry && prefixIs(line, "date:")) {
 464                         result = line;
 465                         break;
 466                 }
 467                 if (prefixIs(line, "revision"))
 468                         entry = true;
 469         }
 470         if (result.empty())
 471                 return false;
 472
 473         rev_date_cache_ = token(result, ' ', 1);
 474         rev_time_cache_ = rtrim(token(result, ' ', 2), ";");
 475         rev_author_cache_ = trim(token(token(result, ';', 1), ':', 1));
 476
 477         return !rev_author_cache_.empty();
 478 }
 479
 480 bool RCS::prepareFileRevision(string const &revis, string & f)
 481 {
 482         string rev = revis;
 483         if (!VCS::makeRCSRevision(version_, rev))
 484                 return false;
 485
 486         TempFile tempfile("lyxvcrev_" + rev + '_');
 487         tempfile.setAutoRemove(false);
 488         FileName tmpf = tempfile.name();
 489         if (tmpf.empty()) {
 490                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 491                 return false;
 492         }
 493
 494         doVCCommand("co -p" + rev + ' '
 495                       + quoteName(onlyFileName(owner_->absFileName()))
 496                       + " > " + quoteName(tmpf.toFilesystemEncoding()),
 497                 FileName(owner_->filePath()));
 498         tmpf.refresh();
 499         if (tmpf.isFileEmpty())
 500                 return false;
 501
 502         f = tmpf.absFileName();
 503         return true;
 504 }
 505
 506
 507 bool RCS::prepareFileRevisionEnabled()
 508 {
 509         return true;
 510 }
 511
 512
 513 /////////////////////////////////////////////////////////////////////
 514 //
 515 // CVS
 516 //
 517 /////////////////////////////////////////////////////////////////////
 518
 519 CVS::CVS(FileName const & m, Buffer * b) : VCS(b)
 520 {
 521         // Here we know that the buffer file is either already in CVS or
 522         // about to be registered
 523         master_ = m;
 524         have_rev_info_ = false;
 525         scanMaster();
 526 }
 527
 528
 529 FileName const CVS::findFile(FileName const & file)
 530 {
 531         // First we look for the CVS/Entries in the same dir
 532         // where we have file.
 533         FileName const entries(onlyPath(file.absFileName()) + "/CVS/Entries");
 534         string const tmpf = '/' + onlyFileName(file.absFileName()) + '/';
 535         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under cvs in `" << entries
 536                              << "' for `" << tmpf << '\'');
 537         if (entries.isReadableFile()) {
 538                 // Ok we are at least in a CVS dir. Parse the CVS/Entries
 539                 // and see if we can find this file. We do a fast and
 540                 // dirty parse here.
 541                 ifstream ifs(entries.toFilesystemEncoding().c_str());
 542                 string line;
 543                 while (getline(ifs, line)) {
 544                         LYXERR(Debug::LYXVC, "\tEntries: " << line);
 545                         if (contains(line, tmpf))
 546                                 return entries;
 547                 }
 548         }
 549         return FileName();
 550 }
 551
 552
 553 void CVS::scanMaster()
 554 {
 555         LYXERR(Debug::LYXVC, "LyXVC::CVS: scanMaster. \n     Checking: " << master_);
 556         // Ok now we do the real scan...
 557         ifstream ifs(master_.toFilesystemEncoding().c_str());
 558         string name = onlyFileName(owner_->absFileName());
 559         string tmpf = '/' + name + '/';
 560         LYXERR(Debug::LYXVC, "\tlooking for `" << tmpf << '\'');
 561         string line;
 562         static regex const reg("/(.*)/(.*)/(.*)/(.*)/(.*)");
 563         while (getline(ifs, line)) {
 564                 LYXERR(Debug::LYXVC, "\t  line: " << line);
 565                 if (contains(line, tmpf)) {
 566                         // Ok extract the fields.
 567                         smatch sm;
 568
 569                         // false positive from coverity
 570                         // coverity[CHECKED_RETURN]
 571                         regex_match(line, sm, reg);
 572
 573                         //sm[0]; // whole matched string
 574                         //sm[1]; // filename
 575                         version_ = sm.str(2);
 576                         string const file_date = sm.str(3);
 577
 578                         //sm[4]; // options
 579                         //sm[5]; // tag or tagdate
 580                         FileName file(owner_->absFileName());
 581                         if (file.isReadableFile()) {
 582                                 time_t mod = file.lastModified();
 583                                 string mod_date = rtrim(asctime(gmtime(&mod)), "\n");
 584                                 LYXERR(Debug::LYXVC, "Date in Entries: `" << file_date
 585                                         << "'\nModification date of file: `" << mod_date << '\'');
 586                                 if (file.isReadOnly()) {
 587                                         // readonly checkout is unlocked
 588                                         vcstatus = UNLOCKED;
 589                                 } else {
 590                                         FileName bdir(addPath(master_.onlyPath().absFileName(),"Base"));
 591                                         FileName base(addName(bdir.absFileName(),name));
 592                                         // if base version is existent "cvs edit" was used to lock
 593                                         vcstatus = base.isReadableFile() ? LOCKED : NOLOCKING;
 594                                 }
 595                         } else {
 596                                 vcstatus = NOLOCKING;
 597                         }
 598                         break;
 599                 }
 600         }
 601 }
 602
 603
 604 bool CVS::retrieve(FileName const & file)
 605 {
 606         LYXERR(Debug::LYXVC, "LyXVC::CVS: retrieve.\n\t" << file);
 607         // The caller ensures that file does not exist, so no need to check that.
 608         return doVCCommandCall("cvs -q update " + quoteName(file.toFilesystemEncoding()),
 609                                file.onlyPath()) == 0;
 610 }
 611
 612
 613 string const CVS::getTarget(OperationMode opmode) const
 614 {
 615         switch(opmode) {
 616         case Directory:
 617                 // in client server mode CVS does not like full path operand for directory operation
 618                 // since LyX switches to the repo dir "." is good enough as target
 619                 return ".";
 620         case File:
 621                 return quoteName(onlyFileName(owner_->absFileName()));
 622         }
 623         return string();
 624 }
 625
 626
 627 docstring CVS::toString(CvsStatus status) const
 628 {
 629         switch (status) {
 630         case UpToDate:
 631                 return _("Up-to-date");
 632         case LocallyModified:
 633                 return _("Locally Modified");
 634         case LocallyAdded:
 635                 return _("Locally Added");
 636         case NeedsMerge:
 637                 return _("Needs Merge");
 638         case NeedsCheckout:
 639                 return _("Needs Checkout");
 640         case NoCvsFile:
 641                 return _("No CVS file");
 642         case StatusError:
 643                 return _("Cannot retrieve CVS status");
 644         }
 645         return docstring();
 646 }
 647
 648
 649 int CVS::doVCCommandWithOutput(string const & cmd, FileName const & path,
 650         FileName const & output, bool reportError)
 651 {
 652         string redirection = output.empty() ? "" : " > " + quoteName(output.toFilesystemEncoding());
 653         return doVCCommand(cmd + redirection, path, reportError);
 654 }
 655
 656
 657 int CVS::doVCCommandCallWithOutput(std::string const & cmd,
 658         support::FileName const & path,
 659         support::FileName const & output)
 660 {
 661         string redirection = output.empty() ? "" : " > " + quoteName(output.toFilesystemEncoding());
 662         return doVCCommandCall(cmd + redirection, path);
 663 }
 664
 665
 666 CVS::CvsStatus CVS::getStatus()
 667 {
 668         TempFile tempfile("lyxvout");
 669         FileName tmpf = tempfile.name();
 670         if (tmpf.empty()) {
 671                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 672                 return StatusError;
 673         }
 674
 675         if (doVCCommandCallWithOutput("cvs status " + getTarget(File),
 676                 FileName(owner_->filePath()), tmpf)) {
 677                 return StatusError;
 678         }
 679
 680         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
 681         CvsStatus status = NoCvsFile;
 682
 683         while (ifs) {
 684                 string line;
 685                 getline(ifs, line);
 686                 LYXERR(Debug::LYXVC, line << '\n');
 687                 if (prefixIs(line, "File:")) {
 688                         if (contains(line, "Up-to-date"))
 689                                 status = UpToDate;
 690                         else if (contains(line, "Locally Modified"))
 691                                 status = LocallyModified;
 692                         else if (contains(line, "Locally Added"))
 693                                 status = LocallyAdded;
 694                         else if (contains(line, "Needs Merge"))
 695                                 status = NeedsMerge;
 696                         else if (contains(line, "Needs Checkout"))
 697                                 status = NeedsCheckout;
 698                 }
 699         }
 700         return status;
 701 }
 702
 703 void CVS::getRevisionInfo()
 704 {
 705         if (have_rev_info_)
 706                 return;
 707         have_rev_info_ = true;
 708         TempFile tempfile("lyxvout");
 709         FileName tmpf = tempfile.name();
 710         if (tmpf.empty()) {
 711                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 712                 return;
 713         }
 714
 715         int rc = doVCCommandCallWithOutput("cvs log -r" + version_
 716                 + ' ' + getTarget(File),
 717                 FileName(owner_->filePath()), tmpf);
 718         if (rc) {
 719                 LYXERR(Debug::LYXVC, "cvs log failed with exit code " << rc);
 720                 return;
 721         }
 722
 723         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
 724         static regex const reg("date: (.*) (.*) (.*);  author: (.*);  state: (.*);(.*)");
 725
 726         while (ifs) {
 727                 string line;
 728                 getline(ifs, line);
 729                 LYXERR(Debug::LYXVC, line << '\n');
 730                 if (prefixIs(line, "date:")) {
 731                         smatch sm;
 732                         regex_match(line, sm, reg);
 733                         //sm[0]; // whole matched string
 734                         rev_date_cache_ = sm[1];
 735                         rev_time_cache_ = sm[2];
 736                         //sm[3]; // GMT offset
 737                         rev_author_cache_ = sm[4];
 738                         break;
 739                 }
 740         }
 741         if (rev_author_cache_.empty())
 742                 LYXERR(Debug::LYXVC,
 743                    "Could not retrieve revision info for " << version_ <<
 744                    " of " << getTarget(File));
 745 }
 746
 747
 748 void CVS::registrer(string const & msg)
 749 {
 750         doVCCommand("cvs -q add -m \"" + msg + "\" "
 751                 + getTarget(File),
 752                 FileName(owner_->filePath()));
 753 }
 754
 755
 756 bool CVS::renameEnabled()
 757 {
 758         return true;
 759 }
 760
 761
 762 string CVS::rename(support::FileName const & newFile, string const & msg)
 763 {
 764         // CVS has no real rename command, so we create a poor mans version
 765         support::FileName const oldFile(owner_->absFileName());
 766         string ret = copy(newFile, msg);
 767         if (ret.empty())
 768                 return ret;
 769         string cmd = "cvs -q remove -m \"" + msg + "\" " +
 770                 quoteName(oldFile.onlyFileName());
 771         FileName path(oldFile.onlyPath());
 772         return doVCCommand(cmd, path) ? string() : ret;
 773 }
 774
 775
 776 bool CVS::copyEnabled()
 777 {
 778         return true;
 779 }
 780
 781
 782 string CVS::copy(support::FileName const & newFile, string const & msg)
 783 {
 784         // CVS has no real copy command, so we create a poor mans version
 785         support::FileName const oldFile(owner_->absFileName());
 786         if (!oldFile.copyTo(newFile))
 787                 return string();
 788         FileName path(oldFile.onlyPath());
 789         string relFile(to_utf8(newFile.relPath(path.absFileName())));
 790         string cmd("cvs -q add -m \"" + msg + "\" " + quoteName(relFile));
 791         return doVCCommand(cmd, path) ? string() : "CVS: Proceeded";
 792 }
 793
 794
 795 void CVS::getDiff(OperationMode opmode, FileName const & tmpf)
 796 {
 797         doVCCommandWithOutput("cvs diff " + getTarget(opmode),
 798                 FileName(owner_->filePath()), tmpf, false);
 799 }
 800
 801
 802 int CVS::edit()
 803 {
 804         vcstatus = LOCKED;
 805         return doVCCommand("cvs -q edit " + getTarget(File),
 806                 FileName(owner_->filePath()));
 807 }
 808
 809
 810 int CVS::unedit()
 811 {
 812         vcstatus = UNLOCKED;
 813         return doVCCommand("cvs -q unedit " + getTarget(File),
 814                 FileName(owner_->filePath()));
 815 }
 816
 817
 818 int CVS::update(OperationMode opmode, FileName const & tmpf)
 819 {
 820         return doVCCommandWithOutput("cvs -q update "
 821                 + getTarget(opmode),
 822                 FileName(owner_->filePath()), tmpf, false);
 823 }
 824
 825
 826 string CVS::scanLogFile(FileName const & f, string & status)
 827 {
 828         ifstream ifs(f.toFilesystemEncoding().c_str());
 829
 830         while (ifs) {
 831                 string line;
 832                 getline(ifs, line);
 833                 LYXERR(Debug::LYXVC, line << '\n');
 834                 if (!line.empty())
 835                         status += line + "; ";
 836                 if (prefixIs(line, "C ")) {
 837                         ifs.close();
 838                         return line;
 839                 }
 840         }
 841         ifs.close();
 842         return string();
 843 }
 844
 845
 846 LyXVC::CommandResult CVS::checkIn(string const & msg, string & log)
 847 {
 848         CvsStatus status = getStatus();
 849         switch (status) {
 850         case UpToDate:
 851                 if (vcstatus != NOLOCKING)
 852                         if (unedit())
 853                                 return LyXVC::ErrorCommand;
 854                 log = "CVS: Proceeded";
 855                 return LyXVC::VCSuccess;
 856         case LocallyModified:
 857         case LocallyAdded: {
 858                 int rc = doVCCommand("cvs -q commit -m \"" + msg + "\" "
 859                         + getTarget(File),
 860                     FileName(owner_->filePath()));
 861                 if (rc)
 862                         return LyXVC::ErrorCommand;
 863                 log = "CVS: Proceeded";
 864                 return LyXVC::VCSuccess;
 865         }
 866         case NeedsMerge:
 867         case NeedsCheckout:
 868                 frontend::Alert::error(_("Revision control error."),
 869                         _("The repository version is newer then the current check out.\n"
 870                           "You have to update from repository first or revert your changes.")) ;
 871                 break;
 872         default:
 873                 frontend::Alert::error(_("Revision control error."),
 874                         bformat(_("Bad status when checking in changes.\n"
 875                                           "\n'%1$s'\n\n"),
 876                                 toString(status)));
 877                 break;
 878         }
 879         return LyXVC::ErrorBefore;
 880 }
 881
 882
 883 bool CVS::isLocked() const
 884 {
 885         FileName fn(owner_->absFileName());
 886         fn.refresh();
 887         return !fn.isReadOnly();
 888 }
 889
 890
 891 bool CVS::checkInEnabled()
 892 {
 893         if (vcstatus != NOLOCKING)
 894                 return isLocked();
 895         else
 896                 return true;
 897 }
 898
 899
 900 bool CVS::isCheckInWithConfirmation()
 901 {
 902         CvsStatus status = getStatus();
 903         return status == LocallyModified || status == LocallyAdded;
 904 }
 905
 906
 907 string CVS::checkOut()
 908 {
 909         if (vcstatus != NOLOCKING && edit())
 910                 return string();
 911         TempFile tempfile("lyxvout");
 912         FileName tmpf = tempfile.name();
 913         if (tmpf.empty()) {
 914                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 915                 return string();
 916         }
 917
 918         int rc = update(File, tmpf);
 919         string log;
 920         string const res = scanLogFile(tmpf, log);
 921         if (!res.empty()) {
 922                 frontend::Alert::error(_("Revision control error."),
 923                         bformat(_("Error when updating from repository.\n"
 924                                 "You have to manually resolve the conflicts NOW!\n'%1$s'.\n\n"
 925                                 "After pressing OK, LyX will try to reopen the resolved document."),
 926                                 from_local8bit(res)));
 927                 rc = 0;
 928         }
 929
 930         return rc ? string() : log.empty() ? "CVS: Proceeded" : "CVS: " + log;
 931 }
 932
 933
 934 bool CVS::checkOutEnabled()
 935 {
 936         if (vcstatus != NOLOCKING)
 937                 return !isLocked();
 938         else
 939                 return true;
 940 }
 941
 942
 943 string CVS::repoUpdate()
 944 {
 945         TempFile tempfile("lyxvout");
 946         FileName tmpf = tempfile.name();
 947         if (tmpf.empty()) {
 948                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 949                 return string();
 950         }
 951
 952         getDiff(Directory, tmpf);
 953         docstring res = tmpf.fileContents("UTF-8");
 954         if (!res.empty()) {
 955                 LYXERR(Debug::LYXVC, "Diff detected:\n" << res);
 956                 docstring const file = from_utf8(owner_->filePath());
 957                 docstring text = bformat(_("There were detected changes "
 958                                 "in the working directory:\n%1$s\n\n"
 959                                 "Possible file conflicts must be then resolved manually "
 960                                 "or you will need to revert back to the repository version."), file);
 961                 int ret = frontend::Alert::prompt(_("Changes detected"),
 962                                 text, 0, 1, _("&Continue"), _("&Abort"), _("View &Log ..."));
 963                 if (ret == 2) {
 964                         dispatch(FuncRequest(LFUN_DIALOG_SHOW, "file " + tmpf.absFileName()));
 965                         ret = frontend::Alert::prompt(_("Changes detected"),
 966                                 text, 0, 1, _("&Continue"), _("&Abort"));
 967                         hideDialogs("file", 0);
 968                 }
 969                 if (ret == 1)
 970                         return string();
 971         }
 972
 973         int rc = update(Directory, tmpf);
 974         res += "Update log:\n" + tmpf.fileContents("UTF-8");
 975         LYXERR(Debug::LYXVC, res);
 976
 977         string log;
 978         string sres = scanLogFile(tmpf, log);
 979         if (!sres.empty()) {
 980                 docstring const file = owner_->fileName().displayName(20);
 981                 frontend::Alert::error(_("Revision control error."),
 982                         bformat(_("Error when updating document %1$s from repository.\n"
 983                                           "You have to manually resolve the conflicts NOW!\n'%2$s'.\n\n"
 984                                           "After pressing OK, LyX will try to reopen the resolved document."),
 985                                 file, from_local8bit(sres)));
 986                 rc = 0;
 987         }
 988
 989         return rc ? string() : log.empty() ? "CVS: Proceeded" : "CVS: " + log;
 990 }
 991
 992
 993 bool CVS::repoUpdateEnabled()
 994 {
 995         return true;
 996 }
 997
 998
 999 string CVS::lockingToggle()
1000 {
1001         lyxerr << "Sorry, not implemented." << endl;
1002         return string();
1003 }
1004
1005
1006 bool CVS::lockingToggleEnabled()
1007 {
1008         return false;
1009 }
1010
1011
1012 bool CVS::isRevertWithConfirmation()
1013 {
1014         CvsStatus status = getStatus();
1015         return !owner_->isClean() || status == LocallyModified || status == NeedsMerge;
1016 }
1017
1018
1019 bool CVS::revert()
1020 {
1021         // Reverts to the version in CVS repository and
1022         // gets the updated version from the repository.
1023         CvsStatus status = getStatus();
1024         switch (status) {
1025         case UpToDate:
1026                 if (vcstatus != NOLOCKING)
1027                         return 0 == unedit();
1028                 break;
1029         case NeedsMerge:
1030         case NeedsCheckout:
1031         case LocallyModified: {
1032                 FileName f(owner_->absFileName());
1033                 f.removeFile();
1034                 update(File, FileName());
1035                 owner_->markClean();
1036                 break;
1037         }
1038         case LocallyAdded: {
1039                 docstring const file = owner_->fileName().displayName(20);
1040                 frontend::Alert::error(_("Revision control error."),
1041                         bformat(_("The document %1$s is not in repository.\n"
1042                                   "You have to check in the first revision before you can revert."),
1043                                 file)) ;
1044                 return false;
1045         }
1046         default: {
1047                 docstring const file = owner_->fileName().displayName(20);
1048                 frontend::Alert::error(_("Revision control error."),
1049                         bformat(_("Cannot revert document %1$s to repository version.\n"
1050                                   "The status '%2$s' is unexpected."),
1051                                 file, toString(status)));
1052                 return false;
1053                 }
1054         }
1055         return true;
1056 }
1057
1058
1059 void CVS::undoLast()
1060 {
1061         // merge the current with the previous version
1062         // in a reverse patch kind of way, so that the
1063         // result is to revert the last changes.
1064         lyxerr << "Sorry, not implemented." << endl;
1065 }
1066
1067
1068 bool CVS::undoLastEnabled()
1069 {
1070         return false;
1071 }
1072
1073
1074 void CVS::getLog(FileName const & tmpf)
1075 {
1076         doVCCommandWithOutput("cvs log " + getTarget(File),
1077                 FileName(owner_->filePath()),
1078                 tmpf);
1079 }
1080
1081
1082 bool CVS::toggleReadOnlyEnabled()
1083 {
1084         return false;
1085 }
1086
1087
1088 string CVS::revisionInfo(LyXVC::RevisionInfo const info)
1089 {
1090         if (!version_.empty()) {
1091                 getRevisionInfo();
1092                 switch (info) {
1093                 case LyXVC::File:
1094                         return version_;
1095                 case LyXVC::Author:
1096                         return rev_author_cache_;
1097                 case LyXVC::Date:
1098                         return rev_date_cache_;
1099                 case LyXVC::Time:
1100                         return rev_time_cache_;
1101                 default: ;
1102                 }
1103         }
1104         return string();
1105 }
1106
1107
1108 bool CVS::prepareFileRevision(string const & revis, string & f)
1109 {
1110         string rev = revis;
1111         if (!VCS::makeRCSRevision(version_, rev))
1112                 return false;
1113
1114         TempFile tempfile("lyxvcrev_" + rev + '_');
1115         tempfile.setAutoRemove(false);
1116         FileName tmpf = tempfile.name();
1117         if (tmpf.empty()) {
1118                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1119                 return false;
1120         }
1121
1122         doVCCommandWithOutput("cvs update -p -r" + rev + ' '
1123                 + getTarget(File),
1124                 FileName(owner_->filePath()), tmpf);
1125         tmpf.refresh();
1126         if (tmpf.isFileEmpty())
1127                 return false;
1128
1129         f = tmpf.absFileName();
1130         return true;
1131 }
1132
1133
1134 bool CVS::prepareFileRevisionEnabled()
1135 {
1136         return true;
1137 }
1138
1139
1140 /////////////////////////////////////////////////////////////////////
1141 //
1142 // SVN
1143 //
1144 /////////////////////////////////////////////////////////////////////
1145
1146 SVN::SVN(FileName const & m, Buffer * b) : VCS(b)
1147 {
1148         // Here we know that the buffer file is either already in SVN or
1149         // about to be registered
1150         master_ = m;
1151         locked_mode_ = 0;
1152         scanMaster();
1153 }
1154
1155
1156 FileName const SVN::findFile(FileName const & file)
1157 {
1158         // First we check the existence of repository meta data.
1159         if (!VCS::checkparentdirs(file, ".svn")) {
1160                 LYXERR(Debug::LYXVC, "Cannot find SVN meta data for " << file);
1161                 return FileName();
1162         }
1163
1164         // Now we check the status of the file.
1165         TempFile tempfile("lyxvcout");
1166         FileName tmpf = tempfile.name();
1167         if (tmpf.empty()) {
1168                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1169                 return FileName();
1170         }
1171
1172         string const fname = onlyFileName(file.absFileName());
1173         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under svn control for `" << fname << '\'');
1174         bool found = 0 == doVCCommandCall("svn info " + quoteName(fname)
1175                                                 + " > " + quoteName(tmpf.toFilesystemEncoding()),
1176                                                 file.onlyPath());
1177         LYXERR(Debug::LYXVC, "SVN control: " << (found ? "enabled" : "disabled"));
1178         return found ? file : FileName();
1179 }
1180
1181
1182 void SVN::scanMaster()
1183 {
1184         // vcstatus code is somewhat superflous,
1185         // until we want to implement read-only toggle for svn.
1186         vcstatus = NOLOCKING;
1187         if (checkLockMode()) {
1188                 if (isLocked())
1189                         vcstatus = LOCKED;
1190                 else
1191                         vcstatus = UNLOCKED;
1192         }
1193 }
1194
1195
1196 bool SVN::checkLockMode()
1197 {
1198         TempFile tempfile("lyxvcout");
1199         FileName tmpf = tempfile.name();
1200         if (tmpf.empty()){
1201                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1202                 return false;
1203         }
1204
1205         LYXERR(Debug::LYXVC, "Detecting locking mode...");
1206         if (doVCCommandCall("svn proplist " + quoteName(onlyFileName(owner_->absFileName()))
1207                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1208                     FileName(owner_->filePath())))
1209                 return false;
1210
1211         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
1212         string line;
1213         bool ret = false;
1214
1215         while (ifs && !ret) {
1216                 getline(ifs, line);
1217                 LYXERR(Debug::LYXVC, line);
1218                 if (contains(line, "svn:needs-lock"))
1219                         ret = true;
1220         }
1221         LYXERR(Debug::LYXVC, "Locking enabled: " << ret);
1222         ifs.close();
1223         locked_mode_ = ret;
1224         return ret;
1225
1226 }
1227
1228
1229 bool SVN::isLocked() const
1230 {
1231         FileName file(owner_->absFileName());
1232         file.refresh();
1233         return !file.isReadOnly();
1234 }
1235
1236
1237 bool SVN::retrieve(FileName const & file)
1238 {
1239         LYXERR(Debug::LYXVC, "LyXVC::SVN: retrieve.\n\t" << file);
1240         // The caller ensures that file does not exist, so no need to check that.
1241         return doVCCommandCall("svn update -q --non-interactive " + quoteName(file.onlyFileName()),
1242                                file.onlyPath()) == 0;
1243 }
1244
1245
1246 void SVN::registrer(string const & /*msg*/)
1247 {
1248         doVCCommand("svn add -q " + quoteName(onlyFileName(owner_->absFileName())),
1249                     FileName(owner_->filePath()));
1250 }
1251
1252
1253 bool SVN::renameEnabled()
1254 {
1255         return true;
1256 }
1257
1258
1259 string SVN::rename(support::FileName const & newFile, string const & msg)
1260 {
1261         // svn move does not require a log message, since it does not commit.
1262         // In LyX we commit immediately afterwards, otherwise it could be
1263         // confusing to the user to have two uncommitted files.
1264         FileName path(owner_->filePath());
1265         string relFile(to_utf8(newFile.relPath(path.absFileName())));
1266         string cmd("svn move -q " + quoteName(onlyFileName(owner_->absFileName())) +
1267                    ' ' + quoteName(relFile));
1268         if (doVCCommand(cmd, path)) {
1269                 cmd = "svn revert -q " +
1270                         quoteName(onlyFileName(owner_->absFileName())) + ' ' +
1271                         quoteName(relFile);
1272                 doVCCommand(cmd, path);
1273                 if (newFile.exists())
1274                         newFile.removeFile();
1275                 return string();
1276         }
1277         vector<support::FileName> f;
1278         f.push_back(owner_->fileName());
1279         f.push_back(newFile);
1280         string log;
1281         if (checkIn(f, msg, log) != LyXVC::VCSuccess) {
1282                 cmd = "svn revert -q " +
1283                         quoteName(onlyFileName(owner_->absFileName())) + ' ' +
1284                         quoteName(relFile);
1285                 doVCCommand(cmd, path);
1286                 if (newFile.exists())
1287                         newFile.removeFile();
1288                 return string();
1289         }
1290         return log;
1291 }
1292
1293
1294 bool SVN::copyEnabled()
1295 {
1296         return true;
1297 }
1298
1299
1300 string SVN::copy(support::FileName const & newFile, string const & msg)
1301 {
1302         // svn copy does not require a log message, since it does not commit.
1303         // In LyX we commit immediately afterwards, otherwise it could be
1304         // confusing to the user to have an uncommitted file.
1305         FileName path(owner_->filePath());
1306         string relFile(to_utf8(newFile.relPath(path.absFileName())));
1307         string cmd("svn copy -q " + quoteName(onlyFileName(owner_->absFileName())) +
1308                    ' ' + quoteName(relFile));
1309         if (doVCCommand(cmd, path))
1310                 return string();
1311         vector<support::FileName> f(1, newFile);
1312         string log;
1313         if (checkIn(f, msg, log) == LyXVC::VCSuccess)
1314                 return log;
1315         return string();
1316 }
1317
1318
1319 LyXVC::CommandResult SVN::checkIn(string const & msg, string & log)
1320 {
1321         vector<support::FileName> f(1, owner_->fileName());
1322         return checkIn(f, msg, log);
1323 }
1324
1325
1326 LyXVC::CommandResult
1327 SVN::checkIn(vector<support::FileName> const & f, string const & msg, string & log)
1328 {
1329         TempFile tempfile("lyxvcout");
1330         FileName tmpf = tempfile.name();
1331         if (tmpf.empty()){
1332                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1333                 log = N_("Error: Could not generate logfile.");
1334                 return LyXVC::ErrorBefore;
1335         }
1336
1337         ostringstream os;
1338         os << "svn commit -m \"" << msg << '"';
1339         for (size_t i = 0; i < f.size(); ++i)
1340                 os << ' ' << quoteName(f[i].onlyFileName());
1341         os << " > " << quoteName(tmpf.toFilesystemEncoding());
1342         LyXVC::CommandResult ret =
1343                 doVCCommand(os.str(), FileName(owner_->filePath())) ?
1344                         LyXVC::ErrorCommand : LyXVC::VCSuccess;
1345
1346         string res = scanLogFile(tmpf, log);
1347         if (!res.empty()) {
1348                 frontend::Alert::error(_("Revision control error."),
1349                                 _("Error when committing to repository.\n"
1350                                 "You have to manually resolve the problem.\n"
1351                                 "LyX will reopen the document after you press OK."));
1352                 ret = LyXVC::ErrorCommand;
1353         }
1354         else
1355                 if (!fileLock(false, tmpf, log))
1356                         ret = LyXVC::ErrorCommand;
1357
1358         if (!log.empty())
1359                 log.insert(0, "SVN: ");
1360         if (ret == LyXVC::VCSuccess && log.empty())
1361                 log = "SVN: Proceeded";
1362         return ret;
1363 }
1364
1365
1366 bool SVN::checkInEnabled()
1367 {
1368         if (locked_mode_)
1369                 return isLocked();
1370         else
1371                 return true;
1372 }
1373
1374
1375 bool SVN::isCheckInWithConfirmation()
1376 {
1377         // FIXME one day common getDiff and perhaps OpMode for all backends
1378
1379         TempFile tempfile("lyxvcout");
1380         FileName tmpf = tempfile.name();
1381         if (tmpf.empty()) {
1382                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1383                 return true;
1384         }
1385
1386         doVCCommandCall("svn diff " + quoteName(owner_->absFileName())
1387                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1388                 FileName(owner_->filePath()));
1389
1390         docstring diff = tmpf.fileContents("UTF-8");
1391
1392         if (diff.empty())
1393                 return false;
1394
1395         return true;
1396 }
1397
1398
1399 // FIXME Correctly return code should be checked instead of this.
1400 // This would need another solution than just plain startscript.
1401 // Hint from Andre': QProcess::readAllStandardError()...
1402 string SVN::scanLogFile(FileName const & f, string & status)
1403 {
1404         ifstream ifs(f.toFilesystemEncoding().c_str());
1405         string line;
1406
1407         while (ifs) {
1408                 getline(ifs, line);
1409                 LYXERR(Debug::LYXVC, line << '\n');
1410                 if (!line.empty())
1411                         status += line + "; ";
1412                 if (prefixIs(line, "C ") || prefixIs(line, "CU ")
1413                                          || contains(line, "Commit failed")) {
1414                         ifs.close();
1415                         return line;
1416                 }
1417                 if (contains(line, "svn:needs-lock")) {
1418                         ifs.close();
1419                         return line;
1420                 }
1421         }
1422         ifs.close();
1423         return string();
1424 }
1425
1426
1427 bool SVN::fileLock(bool lock, FileName const & tmpf, string &status)
1428 {
1429         if (!locked_mode_ || (isLocked() == lock))
1430                 return true;
1431
1432         string const arg = lock ? "lock " : "unlock ";
1433         doVCCommand("svn "+ arg + quoteName(onlyFileName(owner_->absFileName()))
1434                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1435                     FileName(owner_->filePath()));
1436
1437         // Lock error messages go unfortunately on stderr and are unreachible this way.
1438         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
1439         string line;
1440         while (ifs) {
1441                 getline(ifs, line);
1442                 if (!line.empty()) status += line + "; ";
1443         }
1444         ifs.close();
1445
1446         if (isLocked() == lock)
1447                 return true;
1448
1449         if (lock)
1450                 frontend::Alert::error(_("Revision control error."),
1451                         _("Error while acquiring write lock.\n"
1452                         "Another user is most probably editing\n"
1453                         "the current document now!\n"
1454                         "Also check the access to the repository."));
1455         else
1456                 frontend::Alert::error(_("Revision control error."),
1457                         _("Error while releasing write lock.\n"
1458                         "Check the access to the repository."));
1459         return false;
1460 }
1461
1462
1463 string SVN::checkOut()
1464 {
1465         TempFile tempfile("lyxvcout");
1466         FileName tmpf = tempfile.name();
1467         if (tmpf.empty()) {
1468                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1469                 return N_("Error: Could not generate logfile.");
1470         }
1471
1472         doVCCommand("svn update --non-interactive " + quoteName(onlyFileName(owner_->absFileName()))
1473                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1474                     FileName(owner_->filePath()));
1475
1476         string log;
1477         string const res = scanLogFile(tmpf, log);
1478         if (!res.empty())
1479                 frontend::Alert::error(_("Revision control error."),
1480                         bformat(_("Error when updating from repository.\n"
1481                                 "You have to manually resolve the conflicts NOW!\n'%1$s'.\n\n"
1482                                 "After pressing OK, LyX will try to reopen the resolved document."),
1483                         from_local8bit(res)));
1484
1485         fileLock(true, tmpf, log);
1486
1487         return log.empty() ? string() : "SVN: " + log;
1488 }
1489
1490
1491 bool SVN::checkOutEnabled()
1492 {
1493         if (locked_mode_)
1494                 return !isLocked();
1495         else
1496                 return true;
1497 }
1498
1499
1500 string SVN::repoUpdate()
1501 {
1502         TempFile tempfile("lyxvcout");
1503         FileName tmpf = tempfile.name();
1504         if (tmpf.empty()) {
1505                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1506                 return N_("Error: Could not generate logfile.");
1507         }
1508
1509         doVCCommand("svn diff " + quoteName(owner_->filePath())
1510                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1511                 FileName(owner_->filePath()));
1512         docstring res = tmpf.fileContents("UTF-8");
1513         if (!res.empty()) {
1514                 LYXERR(Debug::LYXVC, "Diff detected:\n" << res);
1515                 docstring const file = from_utf8(owner_->filePath());
1516                 docstring text = bformat(_("There were detected changes "
1517                                 "in the working directory:\n%1$s\n\n"
1518                                 "In case of file conflict version of the local directory files "
1519                                 "will be preferred."
1520                                 "\n\nContinue?"), file);
1521                 int ret = frontend::Alert::prompt(_("Changes detected"),
1522                                 text, 0, 1, _("&Yes"), _("&No"), _("View &Log ..."));
1523                 if (ret == 2) {
1524                         dispatch(FuncRequest(LFUN_DIALOG_SHOW, "file " + tmpf.absFileName()));
1525                         ret = frontend::Alert::prompt(_("Changes detected"),
1526                                 text, 0, 1, _("&Yes"), _("&No"));
1527                         hideDialogs("file", 0);
1528                 }
1529                 if (ret == 1)
1530                         return string();
1531         }
1532
1533         // Reverting looks too harsh, see bug #6255.
1534         // doVCCommand("svn revert -R " + quoteName(owner_->filePath())
1535         // + " > " + quoteName(tmpf.toFilesystemEncoding()),
1536         // FileName(owner_->filePath()));
1537         // res = "Revert log:\n" + tmpf.fileContents("UTF-8");
1538         doVCCommand("svn update --accept mine-full " + quoteName(owner_->filePath())
1539                 + " > " + quoteName(tmpf.toFilesystemEncoding()),
1540                 FileName(owner_->filePath()));
1541         res += "Update log:\n" + tmpf.fileContents("UTF-8");
1542
1543         LYXERR(Debug::LYXVC, res);
1544         return to_utf8(res);
1545 }
1546
1547
1548 bool SVN::repoUpdateEnabled()
1549 {
1550         return true;
1551 }
1552
1553
1554 string SVN::lockingToggle()
1555 {
1556         TempFile tempfile("lyxvcout");
1557         FileName tmpf = tempfile.name();
1558         if (tmpf.empty()) {
1559                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1560                 return N_("Error: Could not generate logfile.");
1561         }
1562
1563         int ret = doVCCommand("svn proplist " + quoteName(onlyFileName(owner_->absFileName()))
1564                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1565                     FileName(owner_->filePath()));
1566         if (ret)
1567                 return string();
1568
1569         string log;
1570         string res = scanLogFile(tmpf, log);
1571         bool locking = contains(res, "svn:needs-lock");
1572         if (!locking)
1573                 ret = doVCCommand("svn propset svn:needs-lock ON "
1574                     + quoteName(onlyFileName(owner_->absFileName()))
1575                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1576                     FileName(owner_->filePath()));
1577         else
1578                 ret = doVCCommand("svn propdel svn:needs-lock "
1579                     + quoteName(onlyFileName(owner_->absFileName()))
1580                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1581                     FileName(owner_->filePath()));
1582         if (ret)
1583                 return string();
1584
1585         frontend::Alert::warning(_("SVN File Locking"),
1586                 (locking ? _("Locking property unset.") : _("Locking property set.")) + '\n'
1587                 + _("Do not forget to commit the locking property into the repository."),
1588                 true);
1589
1590         return string("SVN: ") + (locking ?
1591                 N_("Locking property unset.") : N_("Locking property set."));
1592 }
1593
1594
1595 bool SVN::lockingToggleEnabled()
1596 {
1597         return true;
1598 }
1599
1600
1601 bool SVN::revert()
1602 {
1603         // Reverts to the version in SVN repository and
1604         // gets the updated version from the repository.
1605         string const fil = quoteName(onlyFileName(owner_->absFileName()));
1606
1607         if (doVCCommand("svn revert -q " + fil,
1608                     FileName(owner_->filePath())))
1609                 return false;
1610         owner_->markClean();
1611         return true;
1612 }
1613
1614
1615 bool SVN::isRevertWithConfirmation()
1616 {
1617         //FIXME owner && diff
1618         return true;
1619 }
1620
1621
1622 void SVN::undoLast()
1623 {
1624         // merge the current with the previous version
1625         // in a reverse patch kind of way, so that the
1626         // result is to revert the last changes.
1627         lyxerr << "Sorry, not implemented." << endl;
1628 }
1629
1630
1631 bool SVN::undoLastEnabled()
1632 {
1633         return false;
1634 }
1635
1636
1637 string SVN::revisionInfo(LyXVC::RevisionInfo const info)
1638 {
1639         if (info == LyXVC::Tree) {
1640                 if (rev_tree_cache_.empty())
1641                         if (!getTreeRevisionInfo())
1642                                 rev_tree_cache_ = "?";
1643                 if (rev_tree_cache_ == "?")
1644                         return string();
1645
1646                 return rev_tree_cache_;
1647         }
1648
1649         // fill the rest of the attributes for a single file
1650         if (rev_file_cache_.empty())
1651                 if (!getFileRevisionInfo())
1652                         rev_file_cache_ = "?";
1653
1654         switch (info) {
1655                 case LyXVC::File:
1656                         if (rev_file_cache_ == "?")
1657                                 return string();
1658                         return rev_file_cache_;
1659                 case LyXVC::Author:
1660                         return rev_author_cache_;
1661                 case LyXVC::Date:
1662                         return rev_date_cache_;
1663                 case LyXVC::Time:
1664                         return rev_time_cache_;
1665                 default: ;
1666
1667         }
1668
1669         return string();
1670 }
1671
1672
1673 bool SVN::getFileRevisionInfo()
1674 {
1675         TempFile tempfile("lyxvcout");
1676         FileName tmpf = tempfile.name();
1677         if (tmpf.empty()) {
1678                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1679                 return false;
1680         }
1681
1682         doVCCommand("svn info --xml " + quoteName(onlyFileName(owner_->absFileName()))
1683                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1684                     FileName(owner_->filePath()));
1685
1686         if (tmpf.empty())
1687                 return false;
1688
1689         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
1690         string line;
1691         // commit log part
1692         bool c = false;
1693         string rev;
1694
1695         while (ifs) {
1696                 getline(ifs, line);
1697                 LYXERR(Debug::LYXVC, line);
1698                 if (prefixIs(line, "<commit"))
1699                         c = true;
1700                 if (c && prefixIs(line, "   revision=\"") && suffixIs(line, "\">")) {
1701                         string l1 = subst(line, "revision=\"", "");
1702                         string l2 = trim(subst(l1, "\">", ""));
1703                         if (isStrInt(l2))
1704                                 rev_file_cache_ = rev = l2;
1705                 }
1706                 if (c && prefixIs(line, "<author>") && suffixIs(line, "</author>")) {
1707                         string l1 = subst(line, "<author>", "");
1708                         string l2 = subst(l1, "</author>", "");
1709                         rev_author_cache_ = l2;
1710                 }
1711                 if (c && prefixIs(line, "<date>") && suffixIs(line, "</date>")) {
1712                         string l1 = subst(line, "<date>", "");
1713                         string l2 = subst(l1, "</date>", "");
1714                         l2 = split(l2, l1, 'T');
1715                         rev_date_cache_ = l1;
1716                         l2 = split(l2, l1, '.');
1717                         rev_time_cache_ = l1;
1718                 }
1719         }
1720
1721         ifs.close();
1722         return !rev.empty();
1723 }
1724
1725
1726 bool SVN::getTreeRevisionInfo()
1727 {
1728         TempFile tempfile("lyxvcout");
1729         FileName tmpf = tempfile.name();
1730         if (tmpf.empty()) {
1731                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1732                 return false;
1733         }
1734
1735         doVCCommand("svnversion -n . > " + quoteName(tmpf.toFilesystemEncoding()),
1736                     FileName(owner_->filePath()));
1737
1738         if (tmpf.empty())
1739                 return false;
1740
1741         // only first line in case something bad happens.
1742         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
1743         string line;
1744         getline(ifs, line);
1745         ifs.close();
1746
1747         rev_tree_cache_ = line;
1748         return !line.empty();
1749 }
1750
1751
1752 void SVN::getLog(FileName const & tmpf)
1753 {
1754         doVCCommand("svn log " + quoteName(onlyFileName(owner_->absFileName()))
1755                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1756                     FileName(owner_->filePath()));
1757 }
1758
1759
1760 bool SVN::prepareFileRevision(string const & revis, string & f)
1761 {
1762         if (!isStrInt(revis))
1763                 return false;
1764
1765         int rev = convert<int>(revis);
1766         if (rev <= 0)
1767                 if (!getFileRevisionInfo())
1768                         return false;
1769         if (rev == 0)
1770                 rev = convert<int>(rev_file_cache_);
1771         // go back for minus rev
1772         else if (rev < 0) {
1773                 rev = rev + convert<int>(rev_file_cache_);
1774                 if (rev < 1)
1775                         return false;
1776         }
1777
1778         string revname = convert<string>(rev);
1779         TempFile tempfile("lyxvcrev_" + revname + '_');
1780         tempfile.setAutoRemove(false);
1781         FileName tmpf = tempfile.name();
1782         if (tmpf.empty()) {
1783                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1784                 return false;
1785         }
1786
1787         doVCCommand("svn cat -r " + revname + ' '
1788                       + quoteName(onlyFileName(owner_->absFileName()))
1789                       + " > " + quoteName(tmpf.toFilesystemEncoding()),
1790                 FileName(owner_->filePath()));
1791         tmpf.refresh();
1792         if (tmpf.isFileEmpty())
1793                 return false;
1794
1795         f = tmpf.absFileName();
1796         return true;
1797 }
1798
1799
1800 bool SVN::prepareFileRevisionEnabled()
1801 {
1802         return true;
1803 }
1804
1805
1806
1807 bool SVN::toggleReadOnlyEnabled()
1808 {
1809         return false;
1810 }
1811
1812
1813 /////////////////////////////////////////////////////////////////////
1814 //
1815 // GIT
1816 //
1817 /////////////////////////////////////////////////////////////////////
1818
1819 GIT::GIT(FileName const & m, Buffer * b) : VCS(b)
1820 {
1821         // Here we know that the buffer file is either already in GIT or
1822         // about to be registered
1823         master_ = m;
1824         scanMaster();
1825 }
1826
1827
1828 FileName const GIT::findFile(FileName const & file)
1829 {
1830         // First we check the existence of repository meta data.
1831         if (!VCS::checkparentdirs(file, ".git")) {
1832                 LYXERR(Debug::LYXVC, "Cannot find GIT meta data for " << file);
1833                 return FileName();
1834         }
1835
1836         // Now we check the status of the file.
1837         TempFile tempfile("lyxvcout");
1838         FileName tmpf = tempfile.name();
1839         if (tmpf.empty()) {
1840                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1841                 return FileName();
1842         }
1843
1844         string const fname = onlyFileName(file.absFileName());
1845         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under git control for `"
1846                         << fname << '\'');
1847         doVCCommandCall("git ls-files " +
1848                         quoteName(fname) + " > " +
1849                         quoteName(tmpf.toFilesystemEncoding()),
1850                         file.onlyPath());
1851         tmpf.refresh();
1852         bool found = !tmpf.isFileEmpty();
1853         LYXERR(Debug::LYXVC, "GIT control: " << (found ? "enabled" : "disabled"));
1854         return found ? file : FileName();
1855 }
1856
1857
1858 void GIT::scanMaster()
1859 {
1860         // vcstatus code is somewhat superflous,
1861         // until we want to implement read-only toggle for git.
1862         vcstatus = NOLOCKING;
1863 }
1864
1865
1866 bool GIT::retrieve(FileName const & file)
1867 {
1868         LYXERR(Debug::LYXVC, "LyXVC::GIT: retrieve.\n\t" << file);
1869         // The caller ensures that file does not exist, so no need to check that.
1870         return doVCCommandCall("git checkout -q " + quoteName(file.onlyFileName()),
1871                                file.onlyPath()) == 0;
1872 }
1873
1874
1875 void GIT::registrer(string const & /*msg*/)
1876 {
1877         doVCCommand("git add " + quoteName(onlyFileName(owner_->absFileName())),
1878                     FileName(owner_->filePath()));
1879 }
1880
1881
1882 bool GIT::renameEnabled()
1883 {
1884         return true;
1885 }
1886
1887
1888 string GIT::rename(support::FileName const & newFile, string const & msg)
1889 {
1890         // git mv does not require a log message, since it does not commit.
1891         // In LyX we commit immediately afterwards, otherwise it could be
1892         // confusing to the user to have two uncommitted files.
1893         FileName path(owner_->filePath());
1894         string relFile(to_utf8(newFile.relPath(path.absFileName())));
1895         string cmd("git mv " + quoteName(onlyFileName(owner_->absFileName())) +
1896                    ' ' + quoteName(relFile));
1897         if (doVCCommand(cmd, path)) {
1898                 cmd = "git checkout -q " +
1899                         quoteName(onlyFileName(owner_->absFileName())) + ' ' +
1900                         quoteName(relFile);
1901                 doVCCommand(cmd, path);
1902                 if (newFile.exists())
1903                         newFile.removeFile();
1904                 return string();
1905         }
1906         vector<support::FileName> f;
1907         f.push_back(owner_->fileName());
1908         f.push_back(newFile);
1909         string log;
1910         if (checkIn(f, msg, log) != LyXVC::VCSuccess) {
1911                 cmd = "git checkout -q " +
1912                         quoteName(onlyFileName(owner_->absFileName())) + ' ' +
1913                         quoteName(relFile);
1914                 doVCCommand(cmd, path);
1915                 if (newFile.exists())
1916                         newFile.removeFile();
1917                 return string();
1918         }
1919         return log;
1920 }
1921
1922
1923 bool GIT::copyEnabled()
1924 {
1925         return false;
1926 }
1927
1928
1929 string GIT::copy(support::FileName const & /*newFile*/, string const & /*msg*/)
1930 {
1931         // git does not support copy with history preservation
1932         return string();
1933 }
1934
1935
1936 LyXVC::CommandResult GIT::checkIn(string const & msg, string & log)
1937 {
1938         vector<support::FileName> f(1, owner_->fileName());
1939         return checkIn(f, msg, log);
1940 }
1941
1942
1943 LyXVC::CommandResult
1944 GIT::checkIn(vector<support::FileName> const & f, string const & msg, string & log)
1945 {
1946         TempFile tempfile("lyxvcout");
1947         FileName tmpf = tempfile.name();
1948         if (tmpf.empty()){
1949                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1950                 log = N_("Error: Could not generate logfile.");
1951                 return LyXVC::ErrorBefore;
1952         }
1953
1954         ostringstream os;
1955         os << "git commit -m \"" << msg << '"';
1956         for (size_t i = 0; i < f.size(); ++i)
1957                 os << ' ' << quoteName(f[i].onlyFileName());
1958         os << " > " << quoteName(tmpf.toFilesystemEncoding());
1959         LyXVC::CommandResult ret =
1960                 doVCCommand(os.str(), FileName(owner_->filePath())) ?
1961                         LyXVC::ErrorCommand : LyXVC::VCSuccess;
1962
1963         string res = scanLogFile(tmpf, log);
1964         if (!res.empty()) {
1965                 frontend::Alert::error(_("Revision control error."),
1966                                 _("Error when committing to repository.\n"
1967                                 "You have to manually resolve the problem.\n"
1968                                 "LyX will reopen the document after you press OK."));
1969                 ret = LyXVC::ErrorCommand;
1970         }
1971
1972         if (!log.empty())
1973                 log.insert(0, "GIT: ");
1974         if (ret == LyXVC::VCSuccess && log.empty())
1975                 log = "GIT: Proceeded";
1976         return ret;
1977 }
1978
1979
1980 bool GIT::checkInEnabled()
1981 {
1982         return true;
1983 }
1984
1985
1986 bool GIT::isCheckInWithConfirmation()
1987 {
1988         // FIXME one day common getDiff and perhaps OpMode for all backends
1989
1990         TempFile tempfile("lyxvcout");
1991         FileName tmpf = tempfile.name();
1992         if (tmpf.empty()) {
1993                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1994                 return true;
1995         }
1996
1997         doVCCommandCall("git diff " + quoteName(owner_->absFileName())
1998                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1999                 FileName(owner_->filePath()));
2000
2001         docstring diff = tmpf.fileContents("UTF-8");
2002
2003         if (diff.empty())
2004                 return false;
2005
2006         return true;
2007 }
2008
2009
2010 // FIXME Correctly return code should be checked instead of this.
2011 // This would need another solution than just plain startscript.
2012 // Hint from Andre': QProcess::readAllStandardError()...
2013 string GIT::scanLogFile(FileName const & f, string & status)
2014 {
2015         ifstream ifs(f.toFilesystemEncoding().c_str());
2016         string line;
2017
2018         while (ifs) {
2019                 getline(ifs, line);
2020                 LYXERR(Debug::LYXVC, line << "\n");
2021                 if (!line.empty())
2022                         status += line + "; ";
2023                 if (prefixIs(line, "C ") || prefixIs(line, "CU ")
2024                                          || contains(line, "Commit failed")) {
2025                         ifs.close();
2026                         return line;
2027                 }
2028         }
2029         ifs.close();
2030         return string();
2031 }
2032
2033
2034 string GIT::checkOut()
2035 {
2036         return string();
2037 }
2038
2039
2040 bool GIT::checkOutEnabled()
2041 {
2042         return false;
2043 }
2044
2045
2046 string GIT::repoUpdate()
2047 {
2048         return string();
2049 }
2050
2051
2052 bool GIT::repoUpdateEnabled()
2053 {
2054         return false;
2055 }
2056
2057
2058 string GIT::lockingToggle()
2059 {
2060         return string();
2061 }
2062
2063
2064 bool GIT::lockingToggleEnabled()
2065 {
2066         return false;
2067 }
2068
2069
2070 bool GIT::revert()
2071 {
2072         // Reverts to the version in GIT repository and
2073         // gets the updated version from the repository.
2074         string const fil = quoteName(onlyFileName(owner_->absFileName()));
2075
2076         if (doVCCommand("git checkout -q " + fil,
2077                     FileName(owner_->filePath())))
2078                 return false;
2079         owner_->markClean();
2080         return true;
2081 }
2082
2083
2084 bool GIT::isRevertWithConfirmation()
2085 {
2086         //FIXME owner && diff
2087         return true;
2088 }
2089
2090
2091 void GIT::undoLast()
2092 {
2093         // merge the current with the previous version
2094         // in a reverse patch kind of way, so that the
2095         // result is to revert the last changes.
2096         lyxerr << "Sorry, not implemented." << endl;
2097 }
2098
2099
2100 bool GIT::undoLastEnabled()
2101 {
2102         return false;
2103 }
2104
2105
2106 string GIT::revisionInfo(LyXVC::RevisionInfo const info)
2107 {
2108         if (info == LyXVC::Tree) {
2109                 if (rev_tree_cache_.empty())
2110                         if (!getTreeRevisionInfo())
2111                                 rev_tree_cache_ = "?";
2112                 if (rev_tree_cache_ == "?")
2113                         return string();
2114
2115                 return rev_tree_cache_;
2116         }
2117
2118         // fill the rest of the attributes for a single file
2119         if (rev_file_cache_.empty())
2120                 if (!getFileRevisionInfo())
2121                         rev_file_cache_ = "?";
2122
2123         switch (info) {
2124                 case LyXVC::File:
2125                         if (rev_file_cache_ == "?")
2126                                 return string();
2127                         return rev_file_cache_;
2128                 case LyXVC::Author:
2129                         return rev_author_cache_;
2130                 case LyXVC::Date:
2131                         return rev_date_cache_;
2132                 case LyXVC::Time:
2133                         return rev_time_cache_;
2134                 default: ;
2135
2136         }
2137
2138         return string();
2139 }
2140
2141
2142 bool GIT::getFileRevisionInfo()
2143 {
2144         TempFile tempfile("lyxvcout");
2145         FileName tmpf = tempfile.name();
2146         if (tmpf.empty()) {
2147                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
2148                 return false;
2149         }
2150
2151         doVCCommand("git log -n 1 --pretty=format:%H%n%an%n%ai " + quoteName(onlyFileName(owner_->absFileName()))
2152                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
2153                     FileName(owner_->filePath()));
2154
2155         if (tmpf.empty())
2156                 return false;
2157
2158         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
2159
2160         if (ifs)
2161                 getline(ifs, rev_file_cache_);
2162         if (ifs)
2163                 getline(ifs, rev_author_cache_);
2164         if (ifs) {
2165                 string line;
2166                 getline(ifs, line);
2167                 rev_time_cache_ = split(line, rev_date_cache_, ' ');
2168         }
2169
2170         ifs.close();
2171         return !rev_file_cache_.empty();
2172 }
2173
2174
2175 bool GIT::getTreeRevisionInfo()
2176 {
2177         TempFile tempfile("lyxvcout");
2178         FileName tmpf = tempfile.name();
2179         if (tmpf.empty()) {
2180                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
2181                 return false;
2182         }
2183
2184         doVCCommand("git describe --abbrev --dirty --long > " + quoteName(tmpf.toFilesystemEncoding()),
2185                     FileName(owner_->filePath()));
2186
2187         if (tmpf.empty())
2188                 return false;
2189
2190         // only first line in case something bad happens.
2191         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
2192         getline(ifs, rev_tree_cache_);
2193         ifs.close();
2194
2195         return !rev_tree_cache_.empty();
2196 }
2197
2198
2199 void GIT::getLog(FileName const & tmpf)
2200 {
2201         doVCCommand("git log " + quoteName(onlyFileName(owner_->absFileName()))
2202                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
2203                     FileName(owner_->filePath()));
2204 }
2205
2206
2207 //at this moment we don't accept revision SHA, but just number of revision steps back
2208 //GUI and infrastucture needs to be changed first
2209 bool GIT::prepareFileRevision(string const & revis, string & f)
2210 {
2211         // anything positive means we got hash, not "0" or minus revision
2212         int rev = 1;
2213
2214         // hash is rarely number and should be long
2215         if (isStrInt(revis) && revis.length()<20)
2216                 rev = convert<int>(revis);
2217
2218         // revision and filename
2219         string pointer;
2220
2221         // go back for "minus" revisions
2222         if (rev <= 0)
2223                 pointer = "HEAD~" + convert<string>(-rev);
2224         // normal hash
2225         else
2226                 pointer = revis;
2227
2228         pointer += ':';
2229
2230         TempFile tempfile("lyxvcrev_" + revis + '_');
2231         tempfile.setAutoRemove(false);
2232         FileName tmpf = tempfile.name();
2233         if (tmpf.empty()) {
2234                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
2235                 return false;
2236         }
2237
2238         doVCCommand("git show " + pointer + "./"
2239                       + quoteName(onlyFileName(owner_->absFileName()))
2240                       + " > " + quoteName(tmpf.toFilesystemEncoding()),
2241                 FileName(owner_->filePath()));
2242         tmpf.refresh();
2243         if (tmpf.isFileEmpty())
2244                 return false;
2245
2246         f = tmpf.absFileName();
2247         return true;
2248 }
2249
2250
2251 bool GIT::prepareFileRevisionEnabled()
2252 {
2253         return true;
2254 }
2255
2256
2257 bool GIT::toggleReadOnlyEnabled()
2258 {
2259         return true;
2260 }
2261
2262
2263 } // namespace lyx