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/regex.h"
  30 #include "support/TempFile.h"
  31
  32 #include <fstream>
  33 #include <iomanip>
  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                 frontend::Alert::error(_("Revision control error."),
  63                         bformat(_("Some problem occurred while running the command:\n"
  64                                   "'%1$s'."),
  65                         from_utf8(cmd)));
  66         return ret;
  67 }
  68
  69
  70 bool VCS::makeRCSRevision(string const &version, string &revis) const
  71 {
  72         string rev = revis;
  73
  74         if (isStrInt(rev)) {
  75                 int back = convert<int>(rev);
  76                 // if positive use as the last number in the whole revision string
  77                 if (back > 0) {
  78                         string base;
  79                         rsplit(version, base , '.');
  80                         rev = base + '.' + rev;
  81                 }
  82                 if (back == 0)
  83                         rev = version;
  84                 // we care about the last number from revision string
  85                 // in case of backward indexing
  86                 if (back < 0) {
  87                         string cur, base;
  88                         cur = rsplit(version, base , '.');
  89                         if (!isStrInt(cur))
  90                                 return false;
  91                         int want = convert<int>(cur) + back;
  92                         if (want <= 0)
  93                                 return false;
  94
  95                         rev = base + '.' + convert<string>(want);
  96                 }
  97         }
  98
  99         revis = rev;
 100         return true;
 101 }
 102
 103
 104 bool VCS::checkparentdirs(FileName const & file, std::string const & vcsdir)
 105 {
 106         FileName dirname = file.onlyPath();
 107         do {
 108                 FileName tocheck = FileName(addName(dirname.absFileName(), vcsdir));
 109                 LYXERR(Debug::LYXVC, "check file: " << tocheck.absFileName());
 110                 if (tocheck.exists())
 111                         return true;
 112                 //this construct because of #8295
 113                 dirname = FileName(dirname.absFileName()).parentPath();
 114         } while (!dirname.empty());
 115         return false;
 116 }
 117
 118
 119 /////////////////////////////////////////////////////////////////////
 120 //
 121 // RCS
 122 //
 123 /////////////////////////////////////////////////////////////////////
 124
 125 RCS::RCS(FileName const & m, Buffer * b) : VCS(b)
 126 {
 127         // Here we know that the buffer file is either already in RCS or
 128         // about to be registered
 129         master_ = m;
 130         scanMaster();
 131 }
 132
 133
 134 FileName const RCS::findFile(FileName const & file)
 135 {
 136         // Check if *,v exists.
 137         FileName tmp(file.absFileName() + ",v");
 138         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under rcs: " << tmp);
 139         if (tmp.isReadableFile()) {
 140                 LYXERR(Debug::LYXVC, "Yes, " << file << " is under rcs.");
 141                 return tmp;
 142         }
 143
 144         // Check if RCS/*,v exists.
 145         tmp = FileName(addName(addPath(onlyPath(file.absFileName()), "RCS"), file.absFileName()) + ",v");
 146         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under rcs: " << tmp);
 147         if (tmp.isReadableFile()) {
 148                 LYXERR(Debug::LYXVC, "Yes, " << file << " is under rcs.");
 149                 return tmp;
 150         }
 151
 152         return FileName();
 153 }
 154
 155
 156 bool RCS::retrieve(FileName const & file)
 157 {
 158         LYXERR(Debug::LYXVC, "LyXVC::RCS: retrieve.\n\t" << file);
 159         // The caller ensures that file does not exist, so no need to check that.
 160         return doVCCommandCall("co -q -r " + quoteName(file.toFilesystemEncoding()),
 161                                FileName()) == 0;
 162 }
 163
 164
 165 void RCS::scanMaster()
 166 {
 167         if (master_.empty())
 168                 return;
 169
 170         LYXERR(Debug::LYXVC, "LyXVC::RCS: scanMaster: " << master_);
 171
 172         ifstream ifs(master_.toFilesystemEncoding().c_str());
 173         // limit the size of strings we read to avoid memory problems
 174         ifs >> setw(65636);
 175
 176         string token;
 177         bool read_enough = false;
 178
 179         while (!read_enough && ifs >> token) {
 180                 LYXERR(Debug::LYXVC, "LyXVC::scanMaster: current lex text: `"
 181                         << token << '\'');
 182
 183                 if (token.empty())
 184                         continue;
 185                 else if (token == "head") {
 186                         // get version here
 187                         string tmv;
 188                         ifs >> tmv;
 189                         tmv = rtrim(tmv, ";");
 190                         version_ = tmv;
 191                         LYXERR(Debug::LYXVC, "LyXVC: version found to be " << tmv);
 192                 } else if (contains(token, "access")
 193                            || contains(token, "symbols")
 194                            || contains(token, "strict")) {
 195                         // nothing
 196                 } else if (contains(token, "locks")) {
 197                         // get locker here
 198                         if (contains(token, ';')) {
 199                                 locker_ = "Unlocked";
 200                                 vcstatus = UNLOCKED;
 201                                 continue;
 202                         }
 203                         string tmpt;
 204                         string s1;
 205                         string s2;
 206                         do {
 207                                 ifs >> tmpt;
 208                                 s1 = rtrim(tmpt, ";");
 209                                 // tmp is now in the format <user>:<version>
 210                                 s1 = split(s1, s2, ':');
 211                                 // s2 is user, and s1 is version
 212                                 if (s1 == version_) {
 213                                         locker_ = s2;
 214                                         vcstatus = LOCKED;
 215                                         break;
 216                                 }
 217                         } while (!contains(tmpt, ';'));
 218
 219                 } else if (token == "comment") {
 220                         // we don't need to read any further than this.
 221                         read_enough = true;
 222                 } else {
 223                         // unexpected
 224                         LYXERR(Debug::LYXVC, "LyXVC::scanMaster(): unexpected token");
 225                 }
 226         }
 227 }
 228
 229
 230 void RCS::registrer(string const & msg)
 231 {
 232         string cmd = "ci -q -u -i -t-\"";
 233         cmd += msg;
 234         cmd += "\" ";
 235         cmd += quoteName(onlyFileName(owner_->absFileName()));
 236         doVCCommand(cmd, FileName(owner_->filePath()));
 237 }
 238
 239
 240 bool RCS::renameEnabled()
 241 {
 242         return false;
 243 }
 244
 245
 246 string RCS::rename(support::FileName const & /*newFile*/, string const & /*msg*/)
 247 {
 248         // not implemented, since a left-over file.lyx,v would be confusing.
 249         return string();
 250 }
 251
 252
 253 bool RCS::copyEnabled()
 254 {
 255         return true;
 256 }
 257
 258
 259 string RCS::copy(support::FileName const & newFile, string const & msg)
 260 {
 261         // RCS has no real copy command, so we create a poor mans version
 262         support::FileName const oldFile(owner_->absFileName());
 263         if (!oldFile.copyTo(newFile))
 264                 return string();
 265         FileName path(oldFile.onlyPath());
 266         string relFile(to_utf8(newFile.relPath(path.absFileName())));
 267         string cmd = "ci -q -u -i -t-\"";
 268         cmd += msg;
 269         cmd += "\" ";
 270         cmd += quoteName(relFile);
 271         return doVCCommand(cmd, path) ? string() : "RCS: Proceeded";
 272 }
 273
 274
 275 LyXVC::CommandResult RCS::checkIn(string const & msg, string & log)
 276 {
 277         int ret = doVCCommand("ci -q -u -m\"" + msg + "\" "
 278                     + quoteName(onlyFileName(owner_->absFileName())),
 279                     FileName(owner_->filePath()));
 280         if (ret)
 281                 return LyXVC::ErrorCommand;
 282         log = "RCS: Proceeded";
 283         return LyXVC::VCSuccess;
 284 }
 285
 286
 287 bool RCS::checkInEnabled()
 288 {
 289         return owner_ && !owner_->hasReadonlyFlag();
 290 }
 291
 292
 293 bool RCS::isCheckInWithConfirmation()
 294 {
 295         // FIXME one day common getDiff for all backends
 296         // docstring diff;
 297         // if (getDiff(file, diff) && diff.empty())
 298         //      return false;
 299
 300         TempFile tempfile("lyxvcout");
 301         FileName tmpf = tempfile.name();
 302         if (tmpf.empty()) {
 303                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 304                 return true;
 305         }
 306
 307         doVCCommandCall("rcsdiff " + quoteName(owner_->absFileName())
 308                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
 309                 FileName(owner_->filePath()));
 310
 311         docstring diff = tmpf.fileContents("UTF-8");
 312
 313         if (diff.empty())
 314                 return false;
 315
 316         return true;
 317 }
 318
 319
 320 string RCS::checkOut()
 321 {
 322         owner_->markClean();
 323         int ret = doVCCommand("co -q -l " + quoteName(onlyFileName(owner_->absFileName())),
 324                     FileName(owner_->filePath()));
 325         return ret ? string() : "RCS: Proceeded";
 326 }
 327
 328
 329 bool RCS::checkOutEnabled()
 330 {
 331         return owner_ && owner_->hasReadonlyFlag();
 332 }
 333
 334
 335 string RCS::repoUpdate()
 336 {
 337         lyxerr << "Sorry, not implemented." << endl;
 338         return string();
 339 }
 340
 341
 342 bool RCS::repoUpdateEnabled()
 343 {
 344         return false;
 345 }
 346
 347
 348 string RCS::lockingToggle()
 349 {
 350         //FIXME this might be actually possible, study rcs -U, rcs -L.
 351         //State should be easy to get inside scanMaster.
 352         //It would fix #4370 and make rcs/svn usage even more closer.
 353         lyxerr << "Sorry, not implemented." << endl;
 354         return string();
 355 }
 356
 357
 358 bool RCS::lockingToggleEnabled()
 359 {
 360         return false;
 361 }
 362
 363
 364 bool RCS::revert()
 365 {
 366         if (doVCCommand("co -f -u" + version_ + ' '
 367                     + quoteName(onlyFileName(owner_->absFileName())),
 368                     FileName(owner_->filePath())))
 369                 return false;
 370         // We ignore changes and just reload!
 371         owner_->markClean();
 372         return true;
 373 }
 374
 375
 376 bool RCS::isRevertWithConfirmation()
 377 {
 378         //FIXME owner && diff ?
 379         return true;
 380 }
 381
 382
 383 void RCS::undoLast()
 384 {
 385         LYXERR(Debug::LYXVC, "LyXVC: undoLast");
 386         doVCCommand("rcs -o" + version_ + ' '
 387                     + quoteName(onlyFileName(owner_->absFileName())),
 388                     FileName(owner_->filePath()));
 389 }
 390
 391
 392 bool RCS::undoLastEnabled()
 393 {
 394         return owner_->hasReadonlyFlag();
 395 }
 396
 397
 398 void RCS::getLog(FileName const & tmpf)
 399 {
 400         doVCCommand("rlog " + quoteName(onlyFileName(owner_->absFileName()))
 401                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
 402                     FileName(owner_->filePath()));
 403 }
 404
 405
 406 bool RCS::toggleReadOnlyEnabled()
 407 {
 408         // This got broken somewhere along lfuns dispatch reorganization.
 409         // reloadBuffer would be needed after this, but thats problematic
 410         // since we are inside Buffer::dispatch.
 411         // return true;
 412         return false;
 413 }
 414
 415
 416 string RCS::revisionInfo(LyXVC::RevisionInfo const info)
 417 {
 418         if (info == LyXVC::File)
 419                 return version_;
 420         // fill the rest of the attributes for a single file
 421         if (rev_date_cache_.empty())
 422                 if (!getRevisionInfo())
 423                         return string();
 424
 425         switch (info) {
 426                 case LyXVC::Author:
 427                         return rev_author_cache_;
 428                 case LyXVC::Date:
 429                         return rev_date_cache_;
 430                 case LyXVC::Time:
 431                         return rev_time_cache_;
 432                 default:
 433                         break;
 434         }
 435
 436         return string();
 437 }
 438
 439
 440 bool RCS::getRevisionInfo()
 441 {
 442         TempFile tempfile("lyxvcout");
 443         FileName tmpf = tempfile.name();
 444         if (tmpf.empty()) {
 445                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 446                 return false;
 447         }
 448         doVCCommand("rlog -r " + quoteName(onlyFileName(owner_->absFileName()))
 449                 + " > " + quoteName(tmpf.toFilesystemEncoding()),
 450                 FileName(owner_->filePath()));
 451
 452         if (tmpf.empty())
 453                 return false;
 454
 455         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
 456         string line;
 457
 458         // we reached to the entry, i.e. after initial log message
 459         bool entry=false;
 460         // line with critical info, e.g:
 461         //"date: 2011/07/02 11:02:54;  author: sanda;  state: Exp;  lines: +17 -2"
 462         string result;
 463
 464         while (ifs) {
 465                 getline(ifs, line);
 466                 LYXERR(Debug::LYXVC, line);
 467                 if (entry && prefixIs(line, "date:")) {
 468                         result = line;
 469                         break;
 470                 }
 471                 if (prefixIs(line, "revision"))
 472                         entry = true;
 473         }
 474         if (result.empty())
 475                 return false;
 476
 477         rev_date_cache_ = token(result, ' ', 1);
 478         rev_time_cache_ = rtrim(token(result, ' ', 2), ";");
 479         rev_author_cache_ = trim(token(token(result, ';', 1), ':', 1));
 480
 481         return !rev_author_cache_.empty();
 482 }
 483
 484 bool RCS::prepareFileRevision(string const &revis, string & f)
 485 {
 486         string rev = revis;
 487         if (!VCS::makeRCSRevision(version_, rev))
 488                 return false;
 489
 490         TempFile tempfile("lyxvcrev_" + rev + '_');
 491         tempfile.setAutoRemove(false);
 492         FileName tmpf = tempfile.name();
 493         if (tmpf.empty()) {
 494                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 495                 return false;
 496         }
 497
 498         doVCCommand("co -p" + rev + ' '
 499                       + quoteName(onlyFileName(owner_->absFileName()))
 500                       + " > " + quoteName(tmpf.toFilesystemEncoding()),
 501                 FileName(owner_->filePath()));
 502         tmpf.refresh();
 503         if (tmpf.isFileEmpty())
 504                 return false;
 505
 506         f = tmpf.absFileName();
 507         return true;
 508 }
 509
 510
 511 bool RCS::prepareFileRevisionEnabled()
 512 {
 513         return true;
 514 }
 515
 516
 517 /////////////////////////////////////////////////////////////////////
 518 //
 519 // CVS
 520 //
 521 /////////////////////////////////////////////////////////////////////
 522
 523 CVS::CVS(FileName const & m, Buffer * b) : VCS(b)
 524 {
 525         // Here we know that the buffer file is either already in CVS or
 526         // about to be registered
 527         master_ = m;
 528         have_rev_info_ = false;
 529         scanMaster();
 530 }
 531
 532
 533 FileName const CVS::findFile(FileName const & file)
 534 {
 535         // First we look for the CVS/Entries in the same dir
 536         // where we have file.
 537         FileName const entries(onlyPath(file.absFileName()) + "/CVS/Entries");
 538         string const tmpf = '/' + onlyFileName(file.absFileName()) + '/';
 539         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under cvs in `" << entries
 540                              << "' for `" << tmpf << '\'');
 541         if (entries.isReadableFile()) {
 542                 // Ok we are at least in a CVS dir. Parse the CVS/Entries
 543                 // and see if we can find this file. We do a fast and
 544                 // dirty parse here.
 545                 ifstream ifs(entries.toFilesystemEncoding().c_str());
 546                 string line;
 547                 while (getline(ifs, line)) {
 548                         LYXERR(Debug::LYXVC, "\tEntries: " << line);
 549                         if (contains(line, tmpf))
 550                                 return entries;
 551                 }
 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 name = onlyFileName(owner_->absFileName());
 563         string 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 mod = file.lastModified();
 587                                 string 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(FileName const & m, 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         master_ = m;
1158         locked_mode_ = false;
1159         scanMaster();
1160 }
1161
1162
1163 FileName const SVN::findFile(FileName const & file)
1164 {
1165         // First we check the existence of repository meta data.
1166         if (!VCS::checkparentdirs(file, ".svn")) {
1167                 LYXERR(Debug::LYXVC, "Cannot find SVN meta data for " << file);
1168                 return FileName();
1169         }
1170
1171         // Now we check the status of the file.
1172         TempFile tempfile("lyxvcout");
1173         FileName tmpf = tempfile.name();
1174         if (tmpf.empty()) {
1175                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1176                 return FileName();
1177         }
1178
1179         string const fname = onlyFileName(file.absFileName());
1180         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under svn control for `" << fname << '\'');
1181         bool found = 0 == doVCCommandCall("svn info " + quoteName(fname)
1182                                                 + " > " + quoteName(tmpf.toFilesystemEncoding()),
1183                                                 file.onlyPath());
1184         LYXERR(Debug::LYXVC, "SVN control: " << (found ? "enabled" : "disabled"));
1185         return found ? file : FileName();
1186 }
1187
1188
1189 void SVN::scanMaster()
1190 {
1191         // vcstatus code is somewhat superflous,
1192         // until we want to implement read-only toggle for svn.
1193         vcstatus = NOLOCKING;
1194         if (checkLockMode()) {
1195                 if (isLocked())
1196                         vcstatus = LOCKED;
1197                 else
1198                         vcstatus = UNLOCKED;
1199         }
1200 }
1201
1202
1203 bool SVN::checkLockMode()
1204 {
1205         TempFile tempfile("lyxvcout");
1206         FileName tmpf = tempfile.name();
1207         if (tmpf.empty()){
1208                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1209                 return false;
1210         }
1211
1212         LYXERR(Debug::LYXVC, "Detecting locking mode...");
1213         if (doVCCommandCall("svn proplist " + quoteName(onlyFileName(owner_->absFileName()))
1214                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1215                     FileName(owner_->filePath())))
1216                 return false;
1217
1218         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
1219         string line;
1220         bool ret = false;
1221
1222         while (ifs && !ret) {
1223                 getline(ifs, line);
1224                 LYXERR(Debug::LYXVC, line);
1225                 if (contains(line, "svn:needs-lock"))
1226                         ret = true;
1227         }
1228         LYXERR(Debug::LYXVC, "Locking enabled: " << ret);
1229         ifs.close();
1230         locked_mode_ = ret;
1231         return ret;
1232
1233 }
1234
1235
1236 bool SVN::isLocked() const
1237 {
1238         FileName file(owner_->absFileName());
1239         file.refresh();
1240         return !file.isReadOnly();
1241 }
1242
1243
1244 bool SVN::retrieve(FileName const & file)
1245 {
1246         LYXERR(Debug::LYXVC, "LyXVC::SVN: retrieve.\n\t" << file);
1247         // The caller ensures that file does not exist, so no need to check that.
1248         return doVCCommandCall("svn update -q --non-interactive " + quoteName(file.onlyFileName()),
1249                                file.onlyPath()) == 0;
1250 }
1251
1252
1253 void SVN::registrer(string const & /*msg*/)
1254 {
1255         doVCCommand("svn add -q " + quoteName(onlyFileName(owner_->absFileName())),
1256                     FileName(owner_->filePath()));
1257 }
1258
1259
1260 bool SVN::renameEnabled()
1261 {
1262         return true;
1263 }
1264
1265
1266 string SVN::rename(support::FileName const & newFile, string const & msg)
1267 {
1268         // svn move does not require a log message, since it does not commit.
1269         // In LyX we commit immediately afterwards, otherwise it could be
1270         // confusing to the user to have two uncommitted files.
1271         FileName path(owner_->filePath());
1272         string relFile(to_utf8(newFile.relPath(path.absFileName())));
1273         string cmd("svn move -q " + quoteName(onlyFileName(owner_->absFileName())) +
1274                    ' ' + quoteName(relFile));
1275         if (doVCCommand(cmd, path)) {
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         vector<support::FileName> f;
1285         f.push_back(owner_->fileName());
1286         f.push_back(newFile);
1287         string log;
1288         if (checkIn(f, msg, log) != LyXVC::VCSuccess) {
1289                 cmd = "svn revert -q " +
1290                         quoteName(onlyFileName(owner_->absFileName())) + ' ' +
1291                         quoteName(relFile);
1292                 doVCCommand(cmd, path);
1293                 if (newFile.exists())
1294                         newFile.removeFile();
1295                 return string();
1296         }
1297         return log;
1298 }
1299
1300
1301 bool SVN::copyEnabled()
1302 {
1303         return true;
1304 }
1305
1306
1307 string SVN::copy(support::FileName const & newFile, string const & msg)
1308 {
1309         // svn copy does not require a log message, since it does not commit.
1310         // In LyX we commit immediately afterwards, otherwise it could be
1311         // confusing to the user to have an uncommitted file.
1312         FileName path(owner_->filePath());
1313         string relFile(to_utf8(newFile.relPath(path.absFileName())));
1314         string cmd("svn copy -q " + quoteName(onlyFileName(owner_->absFileName())) +
1315                    ' ' + quoteName(relFile));
1316         if (doVCCommand(cmd, path))
1317                 return string();
1318         vector<support::FileName> f(1, newFile);
1319         string log;
1320         if (checkIn(f, msg, log) == LyXVC::VCSuccess)
1321                 return log;
1322         return string();
1323 }
1324
1325
1326 LyXVC::CommandResult SVN::checkIn(string const & msg, string & log)
1327 {
1328         vector<support::FileName> f(1, owner_->fileName());
1329         return checkIn(f, msg, log);
1330 }
1331
1332
1333 LyXVC::CommandResult
1334 SVN::checkIn(vector<support::FileName> const & f, string const & msg, string & log)
1335 {
1336         TempFile tempfile("lyxvcout");
1337         FileName tmpf = tempfile.name();
1338         if (tmpf.empty()){
1339                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1340                 log = N_("Error: Could not generate logfile.");
1341                 return LyXVC::ErrorBefore;
1342         }
1343
1344         ostringstream os;
1345         os << "svn commit -m \"" << msg << '"';
1346         for (size_t i = 0; i < f.size(); ++i)
1347                 os << ' ' << quoteName(f[i].onlyFileName());
1348         os << " > " << quoteName(tmpf.toFilesystemEncoding());
1349         LyXVC::CommandResult ret =
1350                 doVCCommand(os.str(), FileName(owner_->filePath())) ?
1351                         LyXVC::ErrorCommand : LyXVC::VCSuccess;
1352
1353         string res = scanLogFile(tmpf, log);
1354         if (!res.empty()) {
1355                 frontend::Alert::error(_("Revision control error."),
1356                                 _("Error when committing to repository.\n"
1357                                 "You have to manually resolve the problem.\n"
1358                                 "LyX will reopen the document after you press OK."));
1359                 ret = LyXVC::ErrorCommand;
1360         }
1361         else
1362                 if (!fileLock(false, tmpf, log))
1363                         ret = LyXVC::ErrorCommand;
1364
1365         if (!log.empty())
1366                 log.insert(0, "SVN: ");
1367         if (ret == LyXVC::VCSuccess && log.empty())
1368                 log = "SVN: Proceeded";
1369         return ret;
1370 }
1371
1372
1373 bool SVN::checkInEnabled()
1374 {
1375         if (locked_mode_)
1376                 return isLocked();
1377         else
1378                 return true;
1379 }
1380
1381
1382 bool SVN::isCheckInWithConfirmation()
1383 {
1384         // FIXME one day common getDiff and perhaps OpMode for all backends
1385
1386         TempFile tempfile("lyxvcout");
1387         FileName tmpf = tempfile.name();
1388         if (tmpf.empty()) {
1389                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1390                 return true;
1391         }
1392
1393         doVCCommandCall("svn diff " + quoteName(owner_->absFileName())
1394                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1395                 FileName(owner_->filePath()));
1396
1397         docstring diff = tmpf.fileContents("UTF-8");
1398
1399         if (diff.empty())
1400                 return false;
1401
1402         return true;
1403 }
1404
1405
1406 // FIXME Correctly return code should be checked instead of this.
1407 // This would need another solution than just plain startscript.
1408 // Hint from Andre': QProcess::readAllStandardError()...
1409 string SVN::scanLogFile(FileName const & f, string & status)
1410 {
1411         ifstream ifs(f.toFilesystemEncoding().c_str());
1412         string line;
1413
1414         while (ifs) {
1415                 getline(ifs, line);
1416                 LYXERR(Debug::LYXVC, line << '\n');
1417                 if (!line.empty())
1418                         status += line + "; ";
1419                 if (prefixIs(line, "C ") || prefixIs(line, "CU ")
1420                                          || contains(line, "Commit failed")) {
1421                         ifs.close();
1422                         return line;
1423                 }
1424                 if (contains(line, "svn:needs-lock")) {
1425                         ifs.close();
1426                         return line;
1427                 }
1428         }
1429         ifs.close();
1430         return string();
1431 }
1432
1433
1434 bool SVN::fileLock(bool lock, FileName const & tmpf, string &status)
1435 {
1436         if (!locked_mode_ || (isLocked() == lock))
1437                 return true;
1438
1439         string const arg = lock ? "lock " : "unlock ";
1440         doVCCommand("svn "+ arg + quoteName(onlyFileName(owner_->absFileName()))
1441                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1442                     FileName(owner_->filePath()));
1443
1444         // Lock error messages go unfortunately on stderr and are unreachable this way.
1445         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
1446         string line;
1447         while (ifs) {
1448                 getline(ifs, line);
1449                 if (!line.empty()) status += line + "; ";
1450         }
1451         ifs.close();
1452
1453         if (isLocked() == lock)
1454                 return true;
1455
1456         if (lock)
1457                 frontend::Alert::error(_("Revision control error."),
1458                         _("Error while acquiring write lock.\n"
1459                         "Another user is most probably editing\n"
1460                         "the current document now!\n"
1461                         "Also check the access to the repository."));
1462         else
1463                 frontend::Alert::error(_("Revision control error."),
1464                         _("Error while releasing write lock.\n"
1465                         "Check the access to the repository."));
1466         return false;
1467 }
1468
1469
1470 string SVN::checkOut()
1471 {
1472         TempFile tempfile("lyxvcout");
1473         FileName tmpf = tempfile.name();
1474         if (tmpf.empty()) {
1475                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1476                 return N_("Error: Could not generate logfile.");
1477         }
1478
1479         doVCCommand("svn update --non-interactive " + quoteName(onlyFileName(owner_->absFileName()))
1480                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1481                     FileName(owner_->filePath()));
1482
1483         string log;
1484         string const res = scanLogFile(tmpf, log);
1485         if (!res.empty())
1486                 frontend::Alert::error(_("Revision control error."),
1487                         bformat(_("Error when updating from repository.\n"
1488                                 "You have to manually resolve the conflicts NOW!\n'%1$s'.\n\n"
1489                                 "After pressing OK, LyX will try to reopen the resolved document."),
1490                         from_local8bit(res)));
1491
1492         fileLock(true, tmpf, log);
1493
1494         return log.empty() ? string() : "SVN: " + log;
1495 }
1496
1497
1498 bool SVN::checkOutEnabled()
1499 {
1500         if (locked_mode_)
1501                 return !isLocked();
1502         else
1503                 return true;
1504 }
1505
1506
1507 string SVN::repoUpdate()
1508 {
1509         TempFile tempfile("lyxvcout");
1510         FileName tmpf = tempfile.name();
1511         if (tmpf.empty()) {
1512                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1513                 return N_("Error: Could not generate logfile.");
1514         }
1515
1516         doVCCommand("svn diff " + quoteName(owner_->filePath())
1517                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1518                 FileName(owner_->filePath()));
1519         docstring res = tmpf.fileContents("UTF-8");
1520         if (!res.empty()) {
1521                 LYXERR(Debug::LYXVC, "Diff detected:\n" << res);
1522                 docstring const file = from_utf8(owner_->filePath());
1523                 docstring text = bformat(_("There were detected changes "
1524                                 "in the working directory:\n%1$s\n\n"
1525                                 "In case of file conflict version of the local directory files "
1526                                 "will be preferred."
1527                                 "\n\nContinue?"), file);
1528                 int ret = frontend::Alert::prompt(_("Changes detected"),
1529                                 text, 0, 1, _("&Yes"), _("&No"), _("View &Log ..."));
1530                 if (ret == 2) {
1531                         dispatch(FuncRequest(LFUN_DIALOG_SHOW, "file " + tmpf.absFileName()));
1532                         ret = frontend::Alert::prompt(_("Changes detected"),
1533                                 text, 0, 1, _("&Yes"), _("&No"));
1534                         hideDialogs("file", nullptr);
1535                 }
1536                 if (ret == 1)
1537                         return string();
1538         }
1539
1540         // Reverting looks too harsh, see bug #6255.
1541         // doVCCommand("svn revert -R " + quoteName(owner_->filePath())
1542         // + " > " + quoteName(tmpf.toFilesystemEncoding()),
1543         // FileName(owner_->filePath()));
1544         // res = "Revert log:\n" + tmpf.fileContents("UTF-8");
1545         doVCCommand("svn update --accept mine-full " + quoteName(owner_->filePath())
1546                 + " > " + quoteName(tmpf.toFilesystemEncoding()),
1547                 FileName(owner_->filePath()));
1548         res += "Update log:\n" + tmpf.fileContents("UTF-8");
1549
1550         LYXERR(Debug::LYXVC, res);
1551         return to_utf8(res);
1552 }
1553
1554
1555 bool SVN::repoUpdateEnabled()
1556 {
1557         return true;
1558 }
1559
1560
1561 string SVN::lockingToggle()
1562 {
1563         TempFile tempfile("lyxvcout");
1564         FileName tmpf = tempfile.name();
1565         if (tmpf.empty()) {
1566                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1567                 return N_("Error: Could not generate logfile.");
1568         }
1569
1570         int ret = doVCCommand("svn proplist " + quoteName(onlyFileName(owner_->absFileName()))
1571                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1572                     FileName(owner_->filePath()));
1573         if (ret)
1574                 return string();
1575
1576         string log;
1577         string res = scanLogFile(tmpf, log);
1578         bool locking = contains(res, "svn:needs-lock");
1579         if (!locking)
1580                 ret = doVCCommand("svn propset svn:needs-lock ON "
1581                     + quoteName(onlyFileName(owner_->absFileName()))
1582                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1583                     FileName(owner_->filePath()));
1584         else
1585                 ret = doVCCommand("svn propdel svn:needs-lock "
1586                     + quoteName(onlyFileName(owner_->absFileName()))
1587                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1588                     FileName(owner_->filePath()));
1589         if (ret)
1590                 return string();
1591
1592         frontend::Alert::warning(_("SVN File Locking"),
1593                 (locking ? _("Locking property unset.") : _("Locking property set.")) + '\n'
1594                 + _("Do not forget to commit the locking property into the repository."),
1595                 true);
1596
1597         return string("SVN: ") + (locking ?
1598                 N_("Locking property unset.") : N_("Locking property set."));
1599 }
1600
1601
1602 bool SVN::lockingToggleEnabled()
1603 {
1604         return true;
1605 }
1606
1607
1608 bool SVN::revert()
1609 {
1610         // Reverts to the version in SVN repository and
1611         // gets the updated version from the repository.
1612         string const fil = quoteName(onlyFileName(owner_->absFileName()));
1613
1614         if (doVCCommand("svn revert -q " + fil,
1615                     FileName(owner_->filePath())))
1616                 return false;
1617         owner_->markClean();
1618         return true;
1619 }
1620
1621
1622 bool SVN::isRevertWithConfirmation()
1623 {
1624         //FIXME owner && diff
1625         return true;
1626 }
1627
1628
1629 void SVN::undoLast()
1630 {
1631         // merge the current with the previous version
1632         // in a reverse patch kind of way, so that the
1633         // result is to revert the last changes.
1634         lyxerr << "Sorry, not implemented." << endl;
1635 }
1636
1637
1638 bool SVN::undoLastEnabled()
1639 {
1640         return false;
1641 }
1642
1643
1644 string SVN::revisionInfo(LyXVC::RevisionInfo const info)
1645 {
1646         if (info == LyXVC::Tree) {
1647                 if (rev_tree_cache_.empty())
1648                         if (!getTreeRevisionInfo())
1649                                 rev_tree_cache_ = "?";
1650                 if (rev_tree_cache_ == "?")
1651                         return string();
1652
1653                 return rev_tree_cache_;
1654         }
1655
1656         // fill the rest of the attributes for a single file
1657         if (rev_file_cache_.empty())
1658                 if (!getFileRevisionInfo())
1659                         rev_file_cache_ = "?";
1660
1661         switch (info) {
1662                 case LyXVC::File:
1663                         if (rev_file_cache_ == "?")
1664                                 return string();
1665                         return rev_file_cache_;
1666                 case LyXVC::Author:
1667                         return rev_author_cache_;
1668                 case LyXVC::Date:
1669                         return rev_date_cache_;
1670                 case LyXVC::Time:
1671                         return rev_time_cache_;
1672                 default:
1673                         break;
1674         }
1675
1676         return string();
1677 }
1678
1679
1680 bool SVN::getFileRevisionInfo()
1681 {
1682         TempFile tempfile("lyxvcout");
1683         FileName tmpf = tempfile.name();
1684         if (tmpf.empty()) {
1685                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1686                 return false;
1687         }
1688
1689         doVCCommand("svn info --xml " + quoteName(onlyFileName(owner_->absFileName()))
1690                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1691                     FileName(owner_->filePath()));
1692
1693         if (tmpf.empty())
1694                 return false;
1695
1696         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
1697         string line;
1698         // commit log part
1699         bool c = false;
1700         string rev;
1701
1702         while (ifs) {
1703                 getline(ifs, line);
1704                 LYXERR(Debug::LYXVC, line);
1705                 if (prefixIs(line, "<commit"))
1706                         c = true;
1707                 if (c && prefixIs(line, "   revision=\"") && suffixIs(line, "\">")) {
1708                         string l1 = subst(line, "revision=\"", "");
1709                         string l2 = trim(subst(l1, "\">", ""));
1710                         if (isStrInt(l2))
1711                                 rev_file_cache_ = rev = l2;
1712                 }
1713                 if (c && prefixIs(line, "<author>") && suffixIs(line, "</author>")) {
1714                         string l1 = subst(line, "<author>", "");
1715                         string l2 = subst(l1, "</author>", "");
1716                         rev_author_cache_ = l2;
1717                 }
1718                 if (c && prefixIs(line, "<date>") && suffixIs(line, "</date>")) {
1719                         string l1 = subst(line, "<date>", "");
1720                         string l2 = subst(l1, "</date>", "");
1721                         l2 = split(l2, l1, 'T');
1722                         rev_date_cache_ = l1;
1723                         l2 = split(l2, l1, '.');
1724                         rev_time_cache_ = l1;
1725                 }
1726         }
1727
1728         ifs.close();
1729         return !rev.empty();
1730 }
1731
1732
1733 bool SVN::getTreeRevisionInfo()
1734 {
1735         TempFile tempfile("lyxvcout");
1736         FileName tmpf = tempfile.name();
1737         if (tmpf.empty()) {
1738                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1739                 return false;
1740         }
1741
1742         doVCCommand("svnversion -n . > " + quoteName(tmpf.toFilesystemEncoding()),
1743                     FileName(owner_->filePath()));
1744
1745         if (tmpf.empty())
1746                 return false;
1747
1748         // only first line in case something bad happens.
1749         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
1750         string line;
1751         getline(ifs, line);
1752         ifs.close();
1753
1754         rev_tree_cache_ = line;
1755         return !line.empty();
1756 }
1757
1758
1759 void SVN::getLog(FileName const & tmpf)
1760 {
1761         doVCCommand("svn log " + quoteName(onlyFileName(owner_->absFileName()))
1762                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
1763                     FileName(owner_->filePath()));
1764 }
1765
1766
1767 bool SVN::prepareFileRevision(string const & revis, string & f)
1768 {
1769         if (!isStrInt(revis))
1770                 return false;
1771
1772         int rev = convert<int>(revis);
1773         if (rev <= 0)
1774                 if (!getFileRevisionInfo())
1775                         return false;
1776         if (rev == 0)
1777                 rev = convert<int>(rev_file_cache_);
1778         // go back for minus rev
1779         else if (rev < 0) {
1780                 rev = rev + convert<int>(rev_file_cache_);
1781                 if (rev < 1)
1782                         return false;
1783         }
1784
1785         string revname = convert<string>(rev);
1786         TempFile tempfile("lyxvcrev_" + revname + '_');
1787         tempfile.setAutoRemove(false);
1788         FileName tmpf = tempfile.name();
1789         if (tmpf.empty()) {
1790                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1791                 return false;
1792         }
1793
1794         doVCCommand("svn cat -r " + revname + ' '
1795                       + quoteName(onlyFileName(owner_->absFileName()))
1796                       + " > " + quoteName(tmpf.toFilesystemEncoding()),
1797                 FileName(owner_->filePath()));
1798         tmpf.refresh();
1799         if (tmpf.isFileEmpty())
1800                 return false;
1801
1802         f = tmpf.absFileName();
1803         return true;
1804 }
1805
1806
1807 bool SVN::prepareFileRevisionEnabled()
1808 {
1809         return true;
1810 }
1811
1812
1813
1814 bool SVN::toggleReadOnlyEnabled()
1815 {
1816         return false;
1817 }
1818
1819
1820 /////////////////////////////////////////////////////////////////////
1821 //
1822 // GIT
1823 //
1824 /////////////////////////////////////////////////////////////////////
1825
1826 GIT::GIT(FileName const & m, Buffer * b) : VCS(b)
1827 {
1828         // Here we know that the buffer file is either already in GIT or
1829         // about to be registered
1830         master_ = m;
1831         scanMaster();
1832 }
1833
1834
1835 FileName const GIT::findFile(FileName const & file)
1836 {
1837         // First we check the existence of repository meta data.
1838         if (!VCS::checkparentdirs(file, ".git")) {
1839                 LYXERR(Debug::LYXVC, "Cannot find GIT meta data for " << file);
1840                 return FileName();
1841         }
1842
1843         // Now we check the status of the file.
1844         TempFile tempfile("lyxvcout");
1845         FileName tmpf = tempfile.name();
1846         if (tmpf.empty()) {
1847                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1848                 return FileName();
1849         }
1850
1851         string const fname = onlyFileName(file.absFileName());
1852         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under git control for `"
1853                         << fname << '\'');
1854         doVCCommandCall("git ls-files " +
1855                         quoteName(fname) + " > " +
1856                         quoteName(tmpf.toFilesystemEncoding()),
1857                         file.onlyPath());
1858         tmpf.refresh();
1859         bool found = !tmpf.isFileEmpty();
1860         LYXERR(Debug::LYXVC, "GIT control: " << (found ? "enabled" : "disabled"));
1861         return found ? file : FileName();
1862 }
1863
1864
1865 void GIT::scanMaster()
1866 {
1867         // vcstatus code is somewhat superflous,
1868         // until we want to implement read-only toggle for git.
1869         vcstatus = NOLOCKING;
1870 }
1871
1872
1873 bool GIT::retrieve(FileName const & file)
1874 {
1875         LYXERR(Debug::LYXVC, "LyXVC::GIT: retrieve.\n\t" << file);
1876         // The caller ensures that file does not exist, so no need to check that.
1877         return doVCCommandCall("git checkout -q " + quoteName(file.onlyFileName()),
1878                                file.onlyPath()) == 0;
1879 }
1880
1881
1882 void GIT::registrer(string const & /*msg*/)
1883 {
1884         doVCCommand("git add " + quoteName(onlyFileName(owner_->absFileName())),
1885                     FileName(owner_->filePath()));
1886 }
1887
1888
1889 bool GIT::renameEnabled()
1890 {
1891         return true;
1892 }
1893
1894
1895 string GIT::rename(support::FileName const & newFile, string const & msg)
1896 {
1897         // git mv does not require a log message, since it does not commit.
1898         // In LyX we commit immediately afterwards, otherwise it could be
1899         // confusing to the user to have two uncommitted files.
1900         FileName path(owner_->filePath());
1901         string relFile(to_utf8(newFile.relPath(path.absFileName())));
1902         string cmd("git mv " + quoteName(onlyFileName(owner_->absFileName())) +
1903                    ' ' + quoteName(relFile));
1904         if (doVCCommand(cmd, path)) {
1905                 cmd = "git checkout -q " +
1906                         quoteName(onlyFileName(owner_->absFileName())) + ' ' +
1907                         quoteName(relFile);
1908                 doVCCommand(cmd, path);
1909                 if (newFile.exists())
1910                         newFile.removeFile();
1911                 return string();
1912         }
1913         vector<support::FileName> f;
1914         f.push_back(owner_->fileName());
1915         f.push_back(newFile);
1916         string log;
1917         if (checkIn(f, msg, log) != LyXVC::VCSuccess) {
1918                 cmd = "git checkout -q " +
1919                         quoteName(onlyFileName(owner_->absFileName())) + ' ' +
1920                         quoteName(relFile);
1921                 doVCCommand(cmd, path);
1922                 if (newFile.exists())
1923                         newFile.removeFile();
1924                 return string();
1925         }
1926         return log;
1927 }
1928
1929
1930 bool GIT::copyEnabled()
1931 {
1932         return false;
1933 }
1934
1935
1936 string GIT::copy(support::FileName const & /*newFile*/, string const & /*msg*/)
1937 {
1938         // git does not support copy with history preservation
1939         return string();
1940 }
1941
1942
1943 LyXVC::CommandResult GIT::checkIn(string const & msg, string & log)
1944 {
1945         vector<support::FileName> f(1, owner_->fileName());
1946         return checkIn(f, msg, log);
1947 }
1948
1949
1950 LyXVC::CommandResult
1951 GIT::checkIn(vector<support::FileName> const & f, string const & msg, string & log)
1952 {
1953         TempFile tempfile("lyxvcout");
1954         FileName tmpf = tempfile.name();
1955         if (tmpf.empty()){
1956                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
1957                 log = N_("Error: Could not generate logfile.");
1958                 return LyXVC::ErrorBefore;
1959         }
1960
1961         ostringstream os;
1962         os << "git commit -m \"" << msg << '"';
1963         for (size_t i = 0; i < f.size(); ++i)
1964                 os << ' ' << quoteName(f[i].onlyFileName());
1965         os << " > " << quoteName(tmpf.toFilesystemEncoding());
1966         LyXVC::CommandResult ret =
1967                 doVCCommand(os.str(), FileName(owner_->filePath())) ?
1968                         LyXVC::ErrorCommand : LyXVC::VCSuccess;
1969
1970         string res = scanLogFile(tmpf, log);
1971         if (!res.empty()) {
1972                 frontend::Alert::error(_("Revision control error."),
1973                                 _("Error when committing to repository.\n"
1974                                 "You have to manually resolve the problem.\n"
1975                                 "LyX will reopen the document after you press OK."));
1976                 ret = LyXVC::ErrorCommand;
1977         }
1978
1979         if (!log.empty())
1980                 log.insert(0, "GIT: ");
1981         if (ret == LyXVC::VCSuccess && log.empty())
1982                 log = "GIT: Proceeded";
1983         return ret;
1984 }
1985
1986
1987 bool GIT::checkInEnabled()
1988 {
1989         return true;
1990 }
1991
1992
1993 bool GIT::isCheckInWithConfirmation()
1994 {
1995         // FIXME one day common getDiff and perhaps OpMode for all backends
1996
1997         TempFile tempfile("lyxvcout");
1998         FileName tmpf = tempfile.name();
1999         if (tmpf.empty()) {
2000                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
2001                 return true;
2002         }
2003
2004         doVCCommandCall("git diff " + quoteName(owner_->absFileName())
2005                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
2006                 FileName(owner_->filePath()));
2007
2008         docstring diff = tmpf.fileContents("UTF-8");
2009
2010         if (diff.empty())
2011                 return false;
2012
2013         return true;
2014 }
2015
2016
2017 // FIXME Correctly return code should be checked instead of this.
2018 // This would need another solution than just plain startscript.
2019 // Hint from Andre': QProcess::readAllStandardError()...
2020 string GIT::scanLogFile(FileName const & f, string & status)
2021 {
2022         ifstream ifs(f.toFilesystemEncoding().c_str());
2023         string line;
2024
2025         while (ifs) {
2026                 getline(ifs, line);
2027                 LYXERR(Debug::LYXVC, line << "\n");
2028                 if (!line.empty())
2029                         status += line + "; ";
2030                 if (prefixIs(line, "C ") || prefixIs(line, "CU ")
2031                                          || contains(line, "Commit failed")) {
2032                         ifs.close();
2033                         return line;
2034                 }
2035         }
2036         ifs.close();
2037         return string();
2038 }
2039
2040
2041 string GIT::checkOut()
2042 {
2043         return string();
2044 }
2045
2046
2047 bool GIT::checkOutEnabled()
2048 {
2049         return false;
2050 }
2051
2052
2053 string GIT::repoUpdate()
2054 {
2055         return string();
2056 }
2057
2058
2059 bool GIT::repoUpdateEnabled()
2060 {
2061         return false;
2062 }
2063
2064
2065 string GIT::lockingToggle()
2066 {
2067         return string();
2068 }
2069
2070
2071 bool GIT::lockingToggleEnabled()
2072 {
2073         return false;
2074 }
2075
2076
2077 bool GIT::revert()
2078 {
2079         // Reverts to the version in GIT repository and
2080         // gets the updated version from the repository.
2081         string const fil = quoteName(onlyFileName(owner_->absFileName()));
2082
2083         if (doVCCommand("git checkout -q " + fil,
2084                     FileName(owner_->filePath())))
2085                 return false;
2086         owner_->markClean();
2087         return true;
2088 }
2089
2090
2091 bool GIT::isRevertWithConfirmation()
2092 {
2093         //FIXME owner && diff
2094         return true;
2095 }
2096
2097
2098 void GIT::undoLast()
2099 {
2100         // merge the current with the previous version
2101         // in a reverse patch kind of way, so that the
2102         // result is to revert the last changes.
2103         lyxerr << "Sorry, not implemented." << endl;
2104 }
2105
2106
2107 bool GIT::undoLastEnabled()
2108 {
2109         return false;
2110 }
2111
2112
2113 string GIT::revisionInfo(LyXVC::RevisionInfo const info)
2114 {
2115         if (info == LyXVC::Tree) {
2116                 if (rev_tree_cache_.empty())
2117                         if (!getTreeRevisionInfo())
2118                                 rev_tree_cache_ = "?";
2119                 if (rev_tree_cache_ == "?")
2120                         return string();
2121
2122                 return rev_tree_cache_;
2123         }
2124
2125         // fill the rest of the attributes for a single file
2126         if (rev_file_cache_.empty())
2127                 if (!getFileRevisionInfo()) {
2128                         rev_file_cache_ = "?";
2129                         rev_file_abbrev_cache_ = "?";
2130     }
2131
2132         switch (info) {
2133                 case LyXVC::File:
2134                         if (rev_file_cache_ == "?")
2135                                 return string();
2136                         return rev_file_cache_;
2137                 case LyXVC::FileAbbrev:
2138                         if (rev_file_abbrev_cache_ == "?")
2139                                 return string();
2140                         return rev_file_abbrev_cache_;
2141                 case LyXVC::Author:
2142                         return rev_author_cache_;
2143                 case LyXVC::Date:
2144                         return rev_date_cache_;
2145                 case LyXVC::Time:
2146                         return rev_time_cache_;
2147                 default:
2148                         break;
2149         }
2150
2151         return string();
2152 }
2153
2154
2155 bool GIT::getFileRevisionInfo()
2156 {
2157         TempFile tempfile("lyxvcout");
2158         FileName tmpf = tempfile.name();
2159         if (tmpf.empty()) {
2160                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
2161                 return false;
2162         }
2163
2164         doVCCommand("git log -n 1 --pretty=format:%H%n%h%n%an%n%ai " + quoteName(onlyFileName(owner_->absFileName()))
2165                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
2166                     FileName(owner_->filePath()));
2167
2168         if (tmpf.empty())
2169                 return false;
2170
2171         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
2172
2173         if (ifs)
2174                 getline(ifs, rev_file_cache_);
2175         if (ifs)
2176                 getline(ifs, rev_file_abbrev_cache_);
2177         if (ifs)
2178                 getline(ifs, rev_author_cache_);
2179         if (ifs) {
2180                 string line;
2181                 getline(ifs, line);
2182                 rev_time_cache_ = split(line, rev_date_cache_, ' ');
2183         }
2184
2185         ifs.close();
2186         return !rev_file_cache_.empty();
2187 }
2188
2189
2190 bool GIT::getTreeRevisionInfo()
2191 {
2192         TempFile tempfile("lyxvcout");
2193         FileName tmpf = tempfile.name();
2194         if (tmpf.empty()) {
2195                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
2196                 return false;
2197         }
2198
2199         doVCCommand("git describe --abbrev --dirty --long > " + quoteName(tmpf.toFilesystemEncoding()),
2200                     FileName(owner_->filePath()),
2201                     false); //git describe returns $?=128 when no tag found (but git repo still exists)
2202
2203         if (tmpf.empty())
2204                 return false;
2205
2206         // only first line in case something bad happens.
2207         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
2208         getline(ifs, rev_tree_cache_);
2209         ifs.close();
2210
2211         return !rev_tree_cache_.empty();
2212 }
2213
2214
2215 void GIT::getLog(FileName const & tmpf)
2216 {
2217         doVCCommand("git log " + quoteName(onlyFileName(owner_->absFileName()))
2218                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
2219                     FileName(owner_->filePath()));
2220 }
2221
2222
2223 //at this moment we don't accept revision SHA, but just number of revision steps back
2224 //GUI and infrastucture needs to be changed first
2225 bool GIT::prepareFileRevision(string const & revis, string & f)
2226 {
2227         // anything positive means we got hash, not "0" or minus revision
2228         int rev = 1;
2229
2230         // hash is rarely number and should be long
2231         if (isStrInt(revis) && revis.length()<20)
2232                 rev = convert<int>(revis);
2233
2234         // revision and filename
2235         string pointer;
2236
2237         // go back for "minus" revisions
2238         if (rev <= 0)
2239                 pointer = "HEAD~" + convert<string>(-rev);
2240         // normal hash
2241         else
2242                 pointer = revis;
2243
2244         pointer += ':';
2245
2246         TempFile tempfile("lyxvcrev_" + revis + '_');
2247         tempfile.setAutoRemove(false);
2248         FileName tmpf = tempfile.name();
2249         if (tmpf.empty()) {
2250                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
2251                 return false;
2252         }
2253
2254         doVCCommand("git show " + pointer + "./"
2255                       + quoteName(onlyFileName(owner_->absFileName()))
2256                       + " > " + quoteName(tmpf.toFilesystemEncoding()),
2257                 FileName(owner_->filePath()));
2258         tmpf.refresh();
2259         if (tmpf.isFileEmpty())
2260                 return false;
2261
2262         f = tmpf.absFileName();
2263         return true;
2264 }
2265
2266
2267 bool GIT::prepareFileRevisionEnabled()
2268 {
2269         return true;
2270 }
2271
2272
2273 bool GIT::toggleReadOnlyEnabled()
2274 {
2275         return true;
2276 }
2277
2278
2279 } // namespace lyx