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  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "VCBackend.h"
  14 #include "Buffer.h"
  15
  16 #include "frontends/alert.h"
  17
  18 #include "support/debug.h"
  19 #include "support/filetools.h"
  20 #include "support/gettext.h"
  21 #include "support/lstrings.h"
  22 #include "support/Path.h"
  23 #include "support/Systemcall.h"
  24
  25 #include <boost/regex.hpp>
  26
  27 #include <fstream>
  28
  29 using namespace std;
  30 using namespace lyx::support;
  31
  32 using boost::regex;
  33 using boost::regex_match;
  34 using boost::smatch;
  35
  36 namespace lyx {
  37
  38
  39 int VCS::doVCCommandCall(string const & cmd, FileName const & path){
  40         LYXERR(Debug::LYXVC, "doVCCommandCall: " << cmd);
  41         Systemcall one;
  42         support::PathChanger p(path);
  43         return one.startscript(Systemcall::Wait, cmd);
  44 }
  45
  46 int VCS::doVCCommand(string const & cmd, FileName const & path)
  47 {
  48         if (owner_)
  49                 owner_->setBusy(true);
  50
  51         int const ret = doVCCommandCall(cmd, path);
  52
  53         if (owner_)
  54                 owner_->setBusy(false);
  55         if (ret)
  56                 frontend::Alert::error(_("Revision control error."),
  57                         bformat(_("Some problem occured while running the command:\n"
  58                                   "'%1$s'."),
  59                         from_utf8(cmd)));
  60         return ret;
  61 }
  62
  63
  64 /////////////////////////////////////////////////////////////////////
  65 //
  66 // RCS
  67 //
  68 /////////////////////////////////////////////////////////////////////
  69
  70 RCS::RCS(FileName const & m)
  71 {
  72         master_ = m;
  73         scanMaster();
  74 }
  75
  76
  77 FileName const RCS::findFile(FileName const & file)
  78 {
  79         // Check if *,v exists.
  80         FileName tmp(file.absFilename() + ",v");
  81         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under rcs: " << tmp);
  82         if (tmp.isReadableFile()) {
  83                 LYXERR(Debug::LYXVC, "Yes, " << file << " is under rcs.");
  84                 return tmp;
  85         }
  86
  87         // Check if RCS/*,v exists.
  88         tmp = FileName(addName(addPath(onlyPath(file.absFilename()), "RCS"), file.absFilename()) + ",v");
  89         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under rcs: " << tmp);
  90         if (tmp.isReadableFile()) {
  91                 LYXERR(Debug::LYXVC, "Yes, " << file << " is under rcs.");
  92                 return tmp;
  93         }
  94
  95         return FileName();
  96 }
  97
  98
  99 void RCS::retrieve(FileName const & file)
 100 {
 101         LYXERR(Debug::LYXVC, "LyXVC::RCS: retrieve.\n\t" << file);
 102         doVCCommandCall("co -q -r " + quoteName(file.toFilesystemEncoding()),
 103                          FileName());
 104 }
 105
 106
 107 void RCS::scanMaster()
 108 {
 109         if (master_.empty())
 110                 return;
 111
 112         LYXERR(Debug::LYXVC, "LyXVC::RCS: scanMaster: " << master_);
 113
 114         ifstream ifs(master_.toFilesystemEncoding().c_str());
 115
 116         string token;
 117         bool read_enough = false;
 118
 119         while (!read_enough && ifs >> token) {
 120                 LYXERR(Debug::LYXVC, "LyXVC::scanMaster: current lex text: `"
 121                         << token << '\'');
 122
 123                 if (token.empty())
 124                         continue;
 125                 else if (token == "head") {
 126                         // get version here
 127                         string tmv;
 128                         ifs >> tmv;
 129                         tmv = rtrim(tmv, ";");
 130                         version_ = tmv;
 131                         LYXERR(Debug::LYXVC, "LyXVC: version found to be " << tmv);
 132                 } else if (contains(token, "access")
 133                            || contains(token, "symbols")
 134                            || contains(token, "strict")) {
 135                         // nothing
 136                 } else if (contains(token, "locks")) {
 137                         // get locker here
 138                         if (contains(token, ';')) {
 139                                 locker_ = "Unlocked";
 140                                 vcstatus = UNLOCKED;
 141                                 continue;
 142                         }
 143                         string tmpt;
 144                         string s1;
 145                         string s2;
 146                         do {
 147                                 ifs >> tmpt;
 148                                 s1 = rtrim(tmpt, ";");
 149                                 // tmp is now in the format <user>:<version>
 150                                 s1 = split(s1, s2, ':');
 151                                 // s2 is user, and s1 is version
 152                                 if (s1 == version_) {
 153                                         locker_ = s2;
 154                                         vcstatus = LOCKED;
 155                                         break;
 156                                 }
 157                         } while (!contains(tmpt, ';'));
 158
 159                 } else if (token == "comment") {
 160                         // we don't need to read any further than this.
 161                         read_enough = true;
 162                 } else {
 163                         // unexpected
 164                         LYXERR(Debug::LYXVC, "LyXVC::scanMaster(): unexpected token");
 165                 }
 166         }
 167 }
 168
 169
 170 void RCS::registrer(string const & msg)
 171 {
 172         string cmd = "ci -q -u -i -t-\"";
 173         cmd += msg;
 174         cmd += "\" ";
 175         cmd += quoteName(onlyFilename(owner_->absFileName()));
 176         doVCCommand(cmd, FileName(owner_->filePath()));
 177 }
 178
 179
 180 string RCS::checkIn(string const & msg)
 181 {
 182         int ret = doVCCommand("ci -q -u -m\"" + msg + "\" "
 183                     + quoteName(onlyFilename(owner_->absFileName())),
 184                     FileName(owner_->filePath()));
 185         return ret ? string() : "RCS: Proceeded";
 186 }
 187
 188 bool RCS::checkInEnabled()
 189 {
 190         return owner_ && !owner_->isReadonly();
 191 }
 192
 193 string RCS::checkOut()
 194 {
 195         owner_->markClean();
 196         int ret = doVCCommand("co -q -l " + quoteName(onlyFilename(owner_->absFileName())),
 197                     FileName(owner_->filePath()));
 198         return ret ? string() : "RCS: Proceeded";
 199 }
 200
 201
 202 bool RCS::checkOutEnabled()
 203 {
 204         return owner_ && owner_->isReadonly();
 205 }
 206
 207
 208 void RCS::revert()
 209 {
 210         doVCCommand("co -f -u" + version() + " "
 211                     + quoteName(onlyFilename(owner_->absFileName())),
 212                     FileName(owner_->filePath()));
 213         // We ignore changes and just reload!
 214         owner_->markClean();
 215 }
 216
 217
 218 void RCS::undoLast()
 219 {
 220         LYXERR(Debug::LYXVC, "LyXVC: undoLast");
 221         doVCCommand("rcs -o" + version() + " "
 222                     + quoteName(onlyFilename(owner_->absFileName())),
 223                     FileName(owner_->filePath()));
 224 }
 225
 226
 227 bool RCS::undoLastEnabled()
 228 {
 229         return true;
 230 }
 231
 232
 233 void RCS::getLog(FileName const & tmpf)
 234 {
 235         doVCCommand("rlog " + quoteName(onlyFilename(owner_->absFileName()))
 236                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
 237                     FileName(owner_->filePath()));
 238 }
 239
 240
 241 bool RCS::toggleReadOnlyEnabled()
 242 {
 243         return true;
 244 }
 245
 246
 247 /////////////////////////////////////////////////////////////////////
 248 //
 249 // CVS
 250 //
 251 /////////////////////////////////////////////////////////////////////
 252
 253 CVS::CVS(FileName const & m, FileName const & f)
 254 {
 255         master_ = m;
 256         file_ = f;
 257         scanMaster();
 258 }
 259
 260
 261 FileName const CVS::findFile(FileName const & file)
 262 {
 263         // First we look for the CVS/Entries in the same dir
 264         // where we have file.
 265         FileName const entries(onlyPath(file.absFilename()) + "/CVS/Entries");
 266         string const tmpf = '/' + onlyFilename(file.absFilename()) + '/';
 267         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under cvs in `" << entries
 268                              << "' for `" << tmpf << '\'');
 269         if (entries.isReadableFile()) {
 270                 // Ok we are at least in a CVS dir. Parse the CVS/Entries
 271                 // and see if we can find this file. We do a fast and
 272                 // dirty parse here.
 273                 ifstream ifs(entries.toFilesystemEncoding().c_str());
 274                 string line;
 275                 while (getline(ifs, line)) {
 276                         LYXERR(Debug::LYXVC, "\tEntries: " << line);
 277                         if (contains(line, tmpf))
 278                                 return entries;
 279                 }
 280         }
 281         return FileName();
 282 }
 283
 284
 285 void CVS::scanMaster()
 286 {
 287         LYXERR(Debug::LYXVC, "LyXVC::CVS: scanMaster. \n     Checking: " << master_);
 288         // Ok now we do the real scan...
 289         ifstream ifs(master_.toFilesystemEncoding().c_str());
 290         string tmpf = '/' + onlyFilename(file_.absFilename()) + '/';
 291         LYXERR(Debug::LYXVC, "\tlooking for `" << tmpf << '\'');
 292         string line;
 293         static regex const reg("/(.*)/(.*)/(.*)/(.*)/(.*)");
 294         while (getline(ifs, line)) {
 295                 LYXERR(Debug::LYXVC, "\t  line: " << line);
 296                 if (contains(line, tmpf)) {
 297                         // Ok extract the fields.
 298                         smatch sm;
 299
 300                         regex_match(line, sm, reg);
 301
 302                         //sm[0]; // whole matched string
 303                         //sm[1]; // filename
 304                         version_ = sm.str(2);
 305                         string const file_date = sm.str(3);
 306
 307                         //sm[4]; // options
 308                         //sm[5]; // tag or tagdate
 309                         // FIXME: must double check file is stattable/existing
 310                         time_t mod = file_.lastModified();
 311                         string mod_date = rtrim(asctime(gmtime(&mod)), "\n");
 312                         LYXERR(Debug::LYXVC, "Date in Entries: `" << file_date
 313                                 << "'\nModification date of file: `" << mod_date << '\'');
 314                         //FIXME this whole locking bussiness is not working under cvs and the machinery
 315                         // conforms to the ci usage, not cvs.
 316                         if (file_date == mod_date) {
 317                                 locker_ = "Unlocked";
 318                                 vcstatus = UNLOCKED;
 319                         } else {
 320                                 // Here we should also to some more checking
 321                                 // to see if there are conflicts or not.
 322                                 locker_ = "Locked";
 323                                 vcstatus = LOCKED;
 324                         }
 325                         break;
 326                 }
 327         }
 328 }
 329
 330
 331 void CVS::registrer(string const & msg)
 332 {
 333         doVCCommand("cvs -q add -m \"" + msg + "\" "
 334                     + quoteName(onlyFilename(owner_->absFileName())),
 335                     FileName(owner_->filePath()));
 336 }
 337
 338
 339 string CVS::checkIn(string const & msg)
 340 {
 341         int ret = doVCCommand("cvs -q commit -m \"" + msg + "\" "
 342                     + quoteName(onlyFilename(owner_->absFileName())),
 343                     FileName(owner_->filePath()));
 344         return ret ? string() : "CVS: Proceeded";
 345 }
 346
 347
 348 bool CVS::checkInEnabled()
 349 {
 350         return true;
 351 }
 352
 353
 354 string CVS::checkOut()
 355 {
 356         // cvs update or perhaps for cvs this should be a noop
 357         // we need to detect conflict (eg "C" in output)
 358         // before we can do this.
 359         lyxerr << "Sorry, not implemented." << endl;
 360         return string();
 361 }
 362
 363
 364 bool CVS::checkOutEnabled()
 365 {
 366         return false;
 367 }
 368
 369
 370 void CVS::revert()
 371 {
 372         // Reverts to the version in CVS repository and
 373         // gets the updated version from the repository.
 374         string const fil = quoteName(onlyFilename(owner_->absFileName()));
 375         // This is sensitive operation, so at lest some check about
 376         // existence of cvs program and its file
 377         if (doVCCommand("cvs log "+ fil, FileName(owner_->filePath())))
 378                 return;
 379         FileName f(owner_->absFileName());
 380         f.removeFile();
 381         doVCCommand("cvs update " + fil,
 382                     FileName(owner_->filePath()));
 383         owner_->markClean();
 384 }
 385
 386
 387 void CVS::undoLast()
 388 {
 389         // merge the current with the previous version
 390         // in a reverse patch kind of way, so that the
 391         // result is to revert the last changes.
 392         lyxerr << "Sorry, not implemented." << endl;
 393 }
 394
 395
 396 bool CVS::undoLastEnabled()
 397 {
 398         return false;
 399 }
 400
 401
 402 void CVS::getLog(FileName const & tmpf)
 403 {
 404         doVCCommand("cvs log " + quoteName(onlyFilename(owner_->absFileName()))
 405                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
 406                     FileName(owner_->filePath()));
 407 }
 408
 409 bool CVS::toggleReadOnlyEnabled()
 410 {
 411         return false;
 412 }
 413
 414 /////////////////////////////////////////////////////////////////////
 415 //
 416 // SVN
 417 //
 418 /////////////////////////////////////////////////////////////////////
 419
 420 SVN::SVN(FileName const & m, FileName const & f)
 421 {
 422         owner_ = 0;
 423         master_ = m;
 424         file_ = f;
 425         locked_mode_ = 0;
 426         scanMaster();
 427 }
 428
 429
 430 FileName const SVN::findFile(FileName const & file)
 431 {
 432         // First we look for the .svn/entries in the same dir
 433         // where we have file.
 434         FileName const entries(onlyPath(file.absFilename()) + "/.svn/entries");
 435         string const tmpf = onlyFilename(file.absFilename());
 436         LYXERR(Debug::LYXVC, "LyXVC: Checking if file is under svn in `" << entries
 437                              << "' for `" << tmpf << '\'');
 438         if (entries.isReadableFile()) {
 439                 // Ok we are at least in a SVN dir. Parse the .svn/entries
 440                 // and see if we can find this file. We do a fast and
 441                 // dirty parse here.
 442                 ifstream ifs(entries.toFilesystemEncoding().c_str());
 443                 string line, oldline;
 444                 while (getline(ifs, line)) {
 445                         if (line == "dir" || line == "file")
 446                                 LYXERR(Debug::LYXVC, "\tEntries: " << oldline);
 447                         if (oldline == tmpf && line == "file")
 448                                 return entries;
 449                         oldline = line;
 450                 }
 451         }
 452         return FileName();
 453 }
 454
 455
 456 void SVN::scanMaster()
 457 {
 458         locker_.clear();
 459         vcstatus = NOLOCKING;
 460         if (checkLockMode()) {
 461                 if (isLocked()) {
 462                         locker_ = "Locked";
 463                         vcstatus = LOCKED;
 464                 } else {
 465                         locker_ = "Unlocked";
 466                         vcstatus = LOCKED;
 467                 }
 468         }
 469 }
 470
 471
 472 bool SVN::checkLockMode()
 473 {
 474         FileName tmpf = FileName::tempName("lyxvcout");
 475         if (tmpf.empty()){
 476                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 477                 return N_("Error: Could not generate logfile.");
 478         }
 479
 480         LYXERR(Debug::LYXVC, "Detecting locking mode...");
 481         if (doVCCommandCall("svn proplist " + quoteName(file_.onlyFileName())
 482                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
 483                     file_.onlyPath()))
 484                 return false;
 485
 486         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
 487         string line;
 488         bool ret = false;
 489
 490         while (ifs) {
 491                 getline(ifs, line);
 492                 LYXERR(Debug::LYXVC, line);
 493                 if (contains(line, "svn:needs-lock"))
 494                         ret = true;
 495         }
 496         LYXERR(Debug::LYXVC, "Locking enabled: " << ret);
 497         ifs.close();
 498         locked_mode_ = ret;
 499         return ret;
 500
 501 }
 502
 503
 504 bool SVN::isLocked() const
 505 {
 506         //refresh file info
 507         FileName file(file_.absFilename());
 508         return !file.isReadOnly();
 509 }
 510
 511
 512 void SVN::registrer(string const & /*msg*/)
 513 {
 514         doVCCommand("svn add -q " + quoteName(onlyFilename(owner_->absFileName())),
 515                     FileName(owner_->filePath()));
 516 }
 517
 518
 519 string SVN::checkIn(string const & msg)
 520 {
 521         FileName tmpf = FileName::tempName("lyxvcout");
 522         if (tmpf.empty()){
 523                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 524                 return N_("Error: Could not generate logfile.");
 525         }
 526
 527         doVCCommand("svn commit -m \"" + msg + "\" "
 528                     + quoteName(onlyFilename(owner_->absFileName()))
 529                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
 530                     FileName(owner_->filePath()));
 531
 532         string log;
 533         string res = scanLogFile(tmpf, log);
 534         if (!res.empty())
 535                 frontend::Alert::error(_("Revision control error."),
 536                                 _("Error when committing to repository.\n"
 537                                 "You have to manually resolve the problem.\n"
 538                                 "After pressing OK, LyX will reopen the document."));
 539         else
 540                 fileLock(false, tmpf, log);
 541
 542         tmpf.erase();
 543         return "SVN: " + log;
 544 }
 545
 546
 547 bool SVN::checkInEnabled()
 548 {
 549         if (locked_mode_)
 550                 return isLocked();
 551         else
 552                 return true;
 553 }
 554
 555
 556 // FIXME Correctly return code should be checked instead of this.
 557 // This would need another solution than just plain startscript.
 558 // Hint from Andre': QProcess::readAllStandardError()...
 559 string SVN::scanLogFile(FileName const & f, string & status)
 560 {
 561         ifstream ifs(f.toFilesystemEncoding().c_str());
 562         string line;
 563
 564         while (ifs) {
 565                 getline(ifs, line);
 566                 lyxerr << line << "\n";
 567                 if (!line.empty()) status += line + "; ";
 568                 if (prefixIs(line, "C ") || contains(line, "Commit failed")) {
 569                         ifs.close();
 570                         return line;
 571                 }
 572         }
 573         ifs.close();
 574         return string();
 575 }
 576
 577
 578 void SVN::fileLock(bool lock, FileName const & tmpf, string &status)
 579 {
 580         if (!locked_mode_ || (isLocked() == lock))
 581                 return;
 582
 583         string arg = lock ? "lock " : "unlock ";
 584         doVCCommand("svn "+ arg + quoteName(onlyFilename(owner_->absFileName()))
 585                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
 586                     FileName(owner_->filePath()));
 587
 588         ifstream ifs(tmpf.toFilesystemEncoding().c_str());
 589         string line;
 590         while (ifs) {
 591                 getline(ifs, line);
 592                 if (!line.empty()) status += line + "; ";
 593         }
 594         ifs.close();
 595
 596         if (!isLocked() && lock)
 597                 frontend::Alert::error(_("Revision control error."),
 598                         _("Error when acquiring write lock.\n"
 599                         "Most probably another user is editing\n"
 600                         "the current document now!\n"
 601                         "Also check the access to the repository."));
 602         if (isLocked() && !lock)
 603                 frontend::Alert::error(_("Revision control error."),
 604                         _("Error when releasing write lock.\n"
 605                         "Check the access to the repository."));
 606 }
 607
 608
 609 string SVN::checkOut()
 610 {
 611         FileName tmpf = FileName::tempName("lyxvcout");
 612         if (tmpf.empty()) {
 613                 LYXERR(Debug::LYXVC, "Could not generate logfile " << tmpf);
 614                 return N_("Error: Could not generate logfile.");
 615         }
 616
 617         doVCCommand("svn update " + quoteName(onlyFilename(owner_->absFileName()))
 618                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
 619                     FileName(owner_->filePath()));
 620
 621         string log;
 622         string res = scanLogFile(tmpf, log);
 623         if (!res.empty())
 624                 frontend::Alert::error(_("Revision control error."),
 625                         bformat(_("Error when updating from repository.\n"
 626                                 "You have to manually resolve the conflicts NOW!\n'%1$s'.\n\n"
 627                                 "After pressing OK, LyX will try to reopen resolved document."),
 628                         from_local8bit(res)));
 629
 630         fileLock(true, tmpf, log);
 631
 632         tmpf.erase();
 633         return "SVN: " + log;
 634 }
 635
 636
 637 bool SVN::checkOutEnabled()
 638 {
 639         if (locked_mode_)
 640                 return !isLocked();
 641         else
 642                 return true;
 643 }
 644
 645
 646 void SVN::revert()
 647 {
 648         // Reverts to the version in CVS repository and
 649         // gets the updated version from the repository.
 650         string const fil = quoteName(onlyFilename(owner_->absFileName()));
 651
 652         doVCCommand("svn revert -q " + fil,
 653                     FileName(owner_->filePath()));
 654         owner_->markClean();
 655 }
 656
 657
 658 void SVN::undoLast()
 659 {
 660         // merge the current with the previous version
 661         // in a reverse patch kind of way, so that the
 662         // result is to revert the last changes.
 663         lyxerr << "Sorry, not implemented." << endl;
 664 }
 665
 666
 667 bool SVN::undoLastEnabled()
 668 {
 669         return false;
 670 }
 671
 672
 673 void SVN::getLog(FileName const & tmpf)
 674 {
 675         doVCCommand("svn log " + quoteName(onlyFilename(owner_->absFileName()))
 676                     + " > " + quoteName(tmpf.toFilesystemEncoding()),
 677                     FileName(owner_->filePath()));
 678 }
 679
 680
 681 bool SVN::toggleReadOnlyEnabled()
 682 {
 683         return false;
 684 }
 685
 686
 687 } // namespace lyx