src/LaTeX.C

   1 /* This file is part of
   2  * ======================================================
   3  *
   4  *           LyX, The Document Processor
   5  *           Copyright 1995 Matthias Ettrich
   6  *           Copyright 1995-2001 The LyX Team.
   7  *
   8  *           This file is Copyright 1996-2001
   9  *           Lars Gullik Bjønnes
  10  *
  11  * ======================================================
  12  */
  13
  14 #include <config.h>
  15
  16 #ifdef __GNUG__
  17 #pragma implementation
  18 #endif
  19
  20 #include "LaTeX.h"
  21 #include "bufferlist.h"
  22 #include "gettext.h"
  23 #include "lyxfunc.h"
  24 #include "debug.h"
  25 #include "funcrequest.h"
  26 #include "support/filetools.h"
  27 #include "support/FileInfo.h"
  28 #include "support/lstrings.h"
  29 #include "support/lyxlib.h"
  30 #include "support/systemcall.h"
  31 #include "support/os.h"
  32 #include "support/path.h"
  33
  34 #include <boost/regex.hpp>
  35
  36 #include <fstream>
  37 #include <cstdio>  // sscanf
  38
  39 #ifndef CXX_GLOBAL_CSTD
  40 using std::sscanf;
  41 #endif
  42
  43 using std::ifstream;
  44 using std::getline;
  45 using std::endl;
  46 using std::vector;
  47 using std::set;
  48 using boost::regex;
  49 using boost::regex_match;
  50 using boost::smatch;
  51
  52 // TODO: in no particular order
  53 // - get rid of the extern BufferList and the call to
  54 //   BufferList::updateIncludedTeXfiles, this should either
  55 //   be done before calling LaTeX::funcs or in a completely
  56 //   different way.
  57 // - the bibtex command options should be supported.
  58 // - the makeindex style files should be taken care of with
  59 //   the dependency mechanism.
  60 // - makeindex commandline options should be supported
  61 // - somewhere support viewing of bibtex and makeindex log files.
  62 // - we should perhaps also scan the bibtex log file
  63 // - we should perhaps also scan the bibtex log file
  64
  65 extern BufferList bufferlist;
  66
  67 /*
  68  * CLASS TEXERRORS
  69  */
  70
  71 void TeXErrors::insertError(int line, string const & error_desc,
  72                             string const & error_text)
  73 {
  74         Error newerr(line, error_desc, error_text);
  75         errors.push_back(newerr);
  76 }
  77
  78 /*
  79  * CLASS LaTeX
  80  */
  81
  82 LaTeX::LaTeX(string const & latex, string const & f, string const & p)
  83                 : cmd(latex), file(f), path(p)
  84 {
  85         num_errors = 0;
  86         depfile = file + ".dep";
  87         if (prefixIs(cmd, "pdf")) { // Do we use pdflatex ?
  88                 depfile += "-pdf";
  89                 output_file = ChangeExtension(file,".pdf");
  90         } else {
  91                 output_file = ChangeExtension(file,".dvi");
  92         }
  93 }
  94
  95
  96 void LaTeX::deleteFilesOnError() const
  97 {
  98         // currently just a dummy function.
  99
 100         // What files do we have to delete?
 101
 102         // This will at least make latex do all the runs
 103         lyx::unlink(depfile);
 104
 105         // but the reason for the error might be in a generated file...
 106
 107         string ofname = OnlyFilename(file);
 108
 109         // bibtex file
 110         string bbl = ChangeExtension(ofname, ".bbl");
 111         lyx::unlink(bbl);
 112
 113         // makeindex file
 114         string ind = ChangeExtension(ofname, ".ind");
 115         lyx::unlink(ind);
 116
 117         // Also remove the aux file
 118         string aux = ChangeExtension(ofname, ".aux");
 119         lyx::unlink(aux);
 120 }
 121
 122
 123 int LaTeX::run(TeXErrors & terr, LyXFunc * lfun)
 124         // We know that this function will only be run if the lyx buffer
 125         // has been changed. We also know that a newly written .tex file
 126         // is always different from the previous one because of the date
 127         // in it. However it seems safe to run latex (at least) on time each
 128         // time the .tex file changes.
 129 {
 130         int scanres = NO_ERRORS;
 131         unsigned int count = 0; // number of times run
 132         num_errors = 0; // just to make sure.
 133         const unsigned int MAX_RUN = 6;
 134         DepTable head; // empty head
 135         bool rerun = false; // rerun requested
 136
 137         // The class LaTeX does not know the temp path.
 138         bufferlist.updateIncludedTeXfiles(lyx::getcwd()); //GetCWD());
 139
 140         // Never write the depfile if an error was encountered.
 141
 142         // 0
 143         // first check if the file dependencies exist:
 144         //     ->If it does exist
 145         //             check if any of the files mentioned in it have
 146         //             changed (done using a checksum).
 147         //                 -> if changed:
 148         //                        run latex once and
 149         //                        remake the dependency file
 150         //                 -> if not changed:
 151         //                        just return there is nothing to do for us.
 152         //     ->if it doesn't exist
 153         //             make it and
 154         //             run latex once (we need to run latex once anyway) and
 155         //             remake the dependency file.
 156         //
 157
 158         FileInfo fi(depfile);
 159         bool had_depfile = fi.exist();
 160         bool run_bibtex = false;
 161         string aux_file = OnlyFilename(ChangeExtension(file, "aux"));
 162
 163         if (had_depfile) {
 164                 lyxerr[Debug::DEPEND] << "Dependency file exists" << endl;
 165                 // Read the dep file:
 166                 head.read(depfile);
 167                 // Update the checksums
 168                 head.update();
 169                 // Can't just check if anything has changed because it might have aborted
 170                 // on error last time... in which cas we need to re-run latex
 171                 // and collect the error messages (even if they are the same).
 172                 if (!FileInfo(output_file).exist()) {
 173                         lyxerr[Debug::DEPEND]
 174                                 << "re-running LaTeX because output file doesn't exist." << endl;
 175                 } else if (!head.sumchange()) {
 176                         lyxerr[Debug::DEPEND] << "return no_change" << endl;
 177                         return NO_CHANGE;
 178                 } else {
 179                         lyxerr[Debug::DEPEND]
 180                                 << "Dependency file has changed" << endl;
 181                 }
 182
 183                 if (head.extchanged(".bib") || head.extchanged(".bst"))
 184                         run_bibtex = true;
 185         } else
 186                 lyxerr[Debug::DEPEND]
 187                         << "Dependency file does not exist" << endl;
 188
 189         /// We scan the aux file even when had_depfile = false,
 190         /// because we can run pdflatex on the file after running latex on it,
 191         /// in which case we will not need to run bibtex again.
 192         vector<Aux_Info> bibtex_info_old;
 193         if (!run_bibtex)
 194                 bibtex_info_old = scanAuxFiles(aux_file);
 195
 196         ++count;
 197         lyxerr[Debug::LATEX] << "Run #" << count << endl;
 198         if (lfun) {
 199                 ostringstream str;
 200                 str << _("LaTeX run number") << ' ' << count;
 201                 lfun->dispatch(FuncRequest(LFUN_MESSAGE, str.str().c_str()));
 202         }
 203
 204         this->operator()();
 205         scanres = scanLogFile(terr);
 206         if (scanres & ERROR_RERUN) {
 207                 lyxerr[Debug::LATEX] << "Rerunning LaTeX" << endl;
 208                 this->operator()();
 209                 scanres = scanLogFile(terr);
 210         }
 211
 212         if (scanres & ERRORS) {
 213                 deleteFilesOnError();
 214                 return scanres; // return on error
 215         }
 216
 217         vector<Aux_Info> const bibtex_info = scanAuxFiles(aux_file);
 218         if (!run_bibtex && bibtex_info_old != bibtex_info)
 219                 run_bibtex = true;
 220
 221         // update the dependencies.
 222         deplog(head); // reads the latex log
 223         head.update();
 224
 225         // 0.5
 226         // At this point we must run external programs if needed.
 227         // makeindex will be run if a .idx file changed or was generated.
 228         // And if there were undefined citations or changes in references
 229         // the .aux file is checked for signs of bibtex. Bibtex is then run
 230         // if needed.
 231
 232         // run makeindex
 233         if (head.haschanged(OnlyFilename(ChangeExtension(file, ".idx")))) {
 234                 // no checks for now
 235                 lyxerr[Debug::LATEX] << "Running MakeIndex." << endl;
 236                 if (lfun) {
 237                         lfun->dispatch(FuncRequest(LFUN_MESSAGE, _("Running MakeIndex.")));
 238                 }
 239
 240                 rerun = runMakeIndex(OnlyFilename(ChangeExtension(file, ".idx")));
 241         }
 242
 243         // run bibtex
 244         // if (scanres & UNDEF_CIT || scanres & RERUN || run_bibtex)
 245         if (scanres & UNDEF_CIT || run_bibtex) {
 246                 // Here we must scan the .aux file and look for
 247                 // "\bibdata" and/or "\bibstyle". If one of those
 248                 // tags is found -> run bibtex and set rerun = true;
 249                 // no checks for now
 250                 lyxerr[Debug::LATEX] << "Running BibTeX." << endl;
 251                 if (lfun) {
 252                         lfun->dispatch(FuncRequest(LFUN_MESSAGE, _("Running BibTeX.")));
 253                 }
 254
 255                 updateBibtexDependencies(head, bibtex_info);
 256                 rerun |= runBibTeX(bibtex_info);
 257         } else if (!had_depfile) {
 258                 /// If we run pdflatex on the file after running latex on it,
 259                 /// then we do not need to run bibtex, but we do need to
 260                 /// insert the .bib and .bst files into the .dep-pdf file.
 261                 updateBibtexDependencies(head, bibtex_info);
 262         }
 263
 264         // 1
 265         // we know on this point that latex has been run once (or we just
 266         // returned) and the question now is to decide if we need to run
 267         // it any more. This is done by asking if any of the files in the
 268         // dependency file has changed. (remember that the checksum for
 269         // a given file is reported to have changed if it just was created)
 270         //     -> if changed or rerun == true:
 271         //             run latex once more and
 272         //             update the dependency structure
 273         //     -> if not changed:
 274         //             we does nothing at this point
 275         //
 276         if (rerun || head.sumchange()) {
 277                 rerun = false;
 278                 ++count;
 279                 lyxerr[Debug::DEPEND]
 280                         << "Dep. file has changed or rerun requested" << endl;
 281                 lyxerr[Debug::LATEX]
 282                         << "Run #" << count << endl;
 283                 if (lfun) {
 284                         ostringstream str;
 285                         str << _("LaTeX run number") << ' ' << count;
 286                         // check lyxstring string stream and gcc 3.1 before fixing
 287                         lfun->dispatch(FuncRequest(LFUN_MESSAGE, str.str().c_str()));
 288                 }
 289
 290                 this->operator()();
 291                 scanres = scanLogFile(terr);
 292                 if (scanres & ERRORS) {
 293                         deleteFilesOnError();
 294                         return scanres; // return on error
 295                 }
 296
 297                 // update the depedencies
 298                 deplog(head); // reads the latex log
 299                 head.update();
 300         } else {
 301                 lyxerr[Debug::DEPEND] << "Dep. file has NOT changed" << endl;
 302         }
 303
 304         // 1.5
 305         // The inclusion of files generated by external programs like
 306         // makeindex or bibtex might have done changes to pagenumbereing,
 307         // etc. And because of this we must run the external programs
 308         // again to make sure everything is redone correctly.
 309         // Also there should be no need to run the external programs any
 310         // more after this.
 311
 312         // run makeindex if the <file>.idx has changed or was generated.
 313         if (head.haschanged(OnlyFilename(ChangeExtension(file, ".idx")))) {
 314                 // no checks for now
 315                 lyxerr[Debug::LATEX] << "Running MakeIndex." << endl;
 316                 if (lfun) {
 317                         lfun->dispatch(FuncRequest(LFUN_MESSAGE, _("Running MakeIndex.")));
 318                 }
 319
 320                 rerun = runMakeIndex(OnlyFilename(ChangeExtension(file, ".idx")));
 321         }
 322
 323         // 2
 324         // we will only run latex more if the log file asks for it.
 325         // or if the sumchange() is true.
 326         //     -> rerun asked for:
 327         //             run latex and
 328         //             remake the dependency file
 329         //             goto 2 or return if max runs are reached.
 330         //     -> rerun not asked for:
 331         //             just return (fall out of bottom of func)
 332         //
 333         while ((head.sumchange() || rerun || (scanres & RERUN))
 334                && count < MAX_RUN) {
 335                 // Yes rerun until message goes away, or until
 336                 // MAX_RUNS are reached.
 337                 rerun = false;
 338                 ++count;
 339                 lyxerr[Debug::LATEX] << "Run #" << count << endl;
 340                 if (lfun) {
 341                         ostringstream str;
 342                         str << _("LaTeX run number") << ' ' << count;
 343                         lfun->dispatch(FuncRequest(LFUN_MESSAGE, str.str().c_str()));
 344                 }
 345
 346                 this->operator()();
 347                 scanres = scanLogFile(terr);
 348                 if (scanres & ERRORS) {
 349                         deleteFilesOnError();
 350                         return scanres; // return on error
 351                 }
 352
 353                 // keep this updated
 354                 head.update();
 355         }
 356
 357         // Write the dependencies to file.
 358         head.write(depfile);
 359         lyxerr[Debug::LATEX] << "Done." << endl;
 360         return scanres;
 361 }
 362
 363
 364 int LaTeX::operator()()
 365 {
 366 #ifndef __EMX__
 367         string tmp = cmd + ' ' + QuoteName(file) + " > /dev/null";
 368 #else // cmd.exe (OS/2) causes SYS0003 error at "/dev/null"
 369         string tmp = cmd + ' ' + file + " > nul";
 370 #endif
 371         Systemcall one;
 372         return one.startscript(Systemcall::Wait, tmp);
 373 }
 374
 375
 376 bool LaTeX::runMakeIndex(string const & f)
 377 {
 378         lyxerr[Debug::LATEX] << "idx file has been made,"
 379                 " running makeindex on file "
 380                              <<  f << endl;
 381
 382         // It should be possible to set the switches for makeindex
 383         // sorting style and such. It would also be very convenient
 384         // to be able to make style files from within LyX. This has
 385         // to come for a later time.
 386         string tmp = "makeindex -c -q ";
 387         tmp += f;
 388         Systemcall one;
 389         one.startscript(Systemcall::Wait, tmp);
 390         return true;
 391 }
 392
 393
 394 vector<Aux_Info> const
 395 LaTeX::scanAuxFiles(string const & file)
 396 {
 397         vector<Aux_Info> result;
 398
 399         result.push_back(scanAuxFile(file));
 400
 401         for (int i = 1; i < 1000; ++i) {
 402                 string file2 = ChangeExtension(file, "") + "." + tostr(i)
 403                         + ".aux";
 404                 FileInfo fi(file2);
 405                 if (!fi.exist())
 406                         break;
 407                 result.push_back(scanAuxFile(file2));
 408         }
 409         return result;
 410 }
 411
 412
 413 Aux_Info const LaTeX::scanAuxFile(string const & file)
 414 {
 415         Aux_Info result;
 416         result.aux_file = file;
 417         scanAuxFile(file, result);
 418         return result;
 419 }
 420
 421
 422 void LaTeX::scanAuxFile(string const & file, Aux_Info & aux_info)
 423 {
 424         lyxerr[Debug::LATEX] << "Scanning aux file: " << file << endl;
 425
 426         ifstream ifs(file.c_str());
 427         string token;
 428         regex reg1("\\\\citation\\{([^}]+)\\}");
 429         regex reg2("\\\\bibdata\\{([^}]+)\\}");
 430         regex reg3("\\\\bibstyle\\{([^}]+)\\}");
 431         regex reg4("\\\\@input\\{([^}]+)\\}");
 432
 433         while (getline(ifs, token)) {
 434                 token = rtrim(token, "\r");
 435                 smatch sub;
 436                 if (regex_match(token, sub, reg1)) {
 437                         string data = sub[1];
 438                         while (!data.empty()) {
 439                                 string citation;
 440                                 data = split(data, citation, ',');
 441                                 lyxerr[Debug::LATEX] << "Citation: "
 442                                                      << citation << endl;
 443                                 aux_info.citations.insert(citation);
 444                         }
 445                 } else if (regex_match(token, sub, reg2)) {
 446                         string data = sub[1];
 447                         // data is now all the bib files separated by ','
 448                         // get them one by one and pass them to the helper
 449                         while (!data.empty()) {
 450                                 string database;
 451                                 data = split(data, database, ',');
 452                                 database = ChangeExtension(database, "bib");
 453                                 lyxerr[Debug::LATEX] << "Bibtex database: `"
 454                                                      << database << "'" << endl;
 455                                 aux_info.databases.insert(database);
 456                         }
 457                 } else if (regex_match(token, sub, reg3)) {
 458                         string style = sub[1];
 459                         // token is now the style file
 460                         // pass it to the helper
 461                         style = ChangeExtension(style, "bst");
 462                         lyxerr[Debug::LATEX] << "Bibtex style: `"
 463                                              << style << "'" << endl;
 464                         aux_info.styles.insert(style);
 465                 } else if (regex_match(token, sub, reg4)) {
 466                         string file2 = sub[1];
 467                         scanAuxFile(file2, aux_info);
 468                 }
 469         }
 470 }
 471
 472
 473 void LaTeX::updateBibtexDependencies(DepTable & dep,
 474                                      vector<Aux_Info> const & bibtex_info)
 475 {
 476         // Since a run of Bibtex mandates more latex runs it is ok to
 477         // remove all ".bib" and ".bst" files.
 478         dep.remove_files_with_extension(".bib");
 479         dep.remove_files_with_extension(".bst");
 480         //string aux = OnlyFilename(ChangeExtension(file, ".aux"));
 481
 482         for (vector<Aux_Info>::const_iterator it = bibtex_info.begin();
 483              it != bibtex_info.end(); ++it) {
 484                 for (set<string>::const_iterator it2 = it->databases.begin();
 485                      it2 != it->databases.end(); ++it2) {
 486                         string file = findtexfile(*it2, "bib");
 487                         if (!file.empty())
 488                                 dep.insert(file, true);
 489                 }
 490
 491                 for (set<string>::const_iterator it2 = it->styles.begin();
 492                      it2 != it->styles.end(); ++it2) {
 493                         string file = findtexfile(*it2, "bst");
 494                         if (!file.empty())
 495                                 dep.insert(file, true);
 496                 }
 497         }
 498 }
 499
 500
 501 bool LaTeX::runBibTeX(vector<Aux_Info> const & bibtex_info)
 502 {
 503         bool result = false;
 504         for (vector<Aux_Info>::const_iterator it = bibtex_info.begin();
 505              it != bibtex_info.end(); ++it) {
 506                 if (it->databases.empty())
 507                         continue;
 508                 result = true;
 509
 510                 string tmp = "bibtex ";
 511                 tmp += OnlyFilename(ChangeExtension(it->aux_file, string()));
 512                 Systemcall one;
 513                 one.startscript(Systemcall::Wait, tmp);
 514         }
 515         // Return whether bibtex was run
 516         return result;
 517 }
 518
 519
 520 int LaTeX::scanLogFile(TeXErrors & terr)
 521 {
 522         int last_line = -1;
 523         int line_count = 1;
 524         int retval = NO_ERRORS;
 525         string tmp = OnlyFilename(ChangeExtension(file, ".log"));
 526         lyxerr[Debug::LATEX] << "Log file: " << tmp << endl;
 527         ifstream ifs(tmp.c_str());
 528
 529         string token;
 530         while (getline(ifs, token)) {
 531                 lyxerr[Debug::LATEX] << "Log line: " << token << endl;
 532
 533                 if (token.empty())
 534                         continue;
 535
 536                 if (prefixIs(token, "LaTeX Warning:")) {
 537                         // Here shall we handle different
 538                         // types of warnings
 539                         retval |= LATEX_WARNING;
 540                         lyxerr[Debug::LATEX] << "LaTeX Warning." << endl;
 541                         if (contains(token, "Rerun to get cross-references")) {
 542                                 retval |= RERUN;
 543                                 lyxerr[Debug::LATEX]
 544                                         << "We should rerun." << endl;
 545                         } else if (contains(token, "Citation")
 546                                    && contains(token, "on page")
 547                                    && contains(token, "undefined")) {
 548                                 retval |= UNDEF_CIT;
 549                         }
 550                 } else if (prefixIs(token, "Package")) {
 551                         // Package warnings
 552                         retval |= PACKAGE_WARNING;
 553                         if (contains(token, "natbib Warning:")) {
 554                                 // Natbib warnings
 555                                 if (contains(token, "Citation")
 556                                     && contains(token, "on page")
 557                                     && contains(token, "undefined")) {
 558                                         retval |= UNDEF_CIT;
 559                                 }
 560                         } else if (contains(token, "run BibTeX")) {
 561                                 retval |= UNDEF_CIT;
 562                         } else if (contains(token, "Rerun LaTeX") ||
 563                                    contains(token, "Rerun to get")) {
 564                                 // at least longtable.sty and bibtopic.sty
 565                                 // might use this.
 566                                 lyxerr[Debug::LATEX]
 567                                         << "We should rerun." << endl;
 568                                 retval |= RERUN;
 569                         }
 570                 } else if (prefixIs(token, "(")) {
 571                         if (contains(token, "Rerun LaTeX") ||
 572                             contains(token, "Rerun to get")) {
 573                                 // Used by natbib
 574                                 lyxerr[Debug::LATEX]
 575                                         << "We should rerun." << endl;
 576                                 retval |= RERUN;
 577                         }
 578                 } else if (prefixIs(token, "! ")) {
 579                         // Ok, we have something that looks like a TeX Error
 580                         // but what do we really have.
 581
 582                         // Just get the error description:
 583                         string desc(token, 2);
 584                         if (contains(token, "LaTeX Error:"))
 585                                 retval |= LATEX_ERROR;
 586                         // get the next line
 587                         string tmp;
 588                         int count = 0;
 589                         do {
 590                                 if (!getline(ifs, tmp))
 591                                         break;
 592                                 if (++count > 10)
 593                                         break;
 594                         } while (!prefixIs(tmp, "l."));
 595                         if (prefixIs(tmp, "l.")) {
 596                                 // we have a latex error
 597                                 retval |=  TEX_ERROR;
 598                                 if (contains(desc, "Package babel Error: You haven't defined the language"))
 599                                         retval |= ERROR_RERUN;
 600                                 // get the line number:
 601                                 int line = 0;
 602                                 sscanf(tmp.c_str(), "l.%d", &line);
 603                                 // get the rest of the message:
 604                                 string errstr(tmp, tmp.find(' '));
 605                                 errstr += '\n';
 606                                 getline(ifs, tmp);
 607                                 while (!contains(errstr, "l.")
 608                                        && !tmp.empty()
 609                                        && !prefixIs(tmp, "! ")
 610                                        && !contains(tmp, "(job aborted")) {
 611                                         errstr += tmp;
 612                                         errstr += "\n";
 613                                         getline(ifs, tmp);
 614                                 }
 615                                 lyxerr[Debug::LATEX]
 616                                         << "line: " << line << '\n'
 617                                         << "Desc: " << desc << '\n'
 618                                         << "Text: " << errstr << endl;
 619                                 if (line == last_line)
 620                                         ++line_count;
 621                                 else {
 622                                         line_count = 1;
 623                                         last_line = line;
 624                                 }
 625                                 if (line_count <= 5) {
 626                                         terr.insertError(line, desc, errstr);
 627                                         ++num_errors;
 628                                 }
 629                         }
 630                 } else {
 631                         // information messages, TeX warnings and other
 632                         // warnings we have not caught earlier.
 633                         if (prefixIs(token, "Overfull ")) {
 634                                 retval |= TEX_WARNING;
 635                         } else if (prefixIs(token, "Underfull ")) {
 636                                 retval |= TEX_WARNING;
 637                         } else if (contains(token, "Rerun to get citations")) {
 638                                 // Natbib seems to use this.
 639                                 retval |= UNDEF_CIT;
 640                         } else if (contains(token, "No pages of output")) {
 641                                 // A dvi file was not created
 642                                 retval |= NO_OUTPUT;
 643                         } else if (contains(token, "That makes 100 errors")) {
 644                                 // More than 100 errors were reprted
 645                                 retval |= TOO_MANY_ERRORS;
 646                         }
 647                 }
 648         }
 649         lyxerr[Debug::LATEX] << "Log line: " << token << endl;
 650         return retval;
 651 }
 652
 653
 654 void LaTeX::deplog(DepTable & head)
 655 {
 656         // This function reads the LaTeX log file end extracts all the external
 657         // files used by the LaTeX run. The files are then entered into the
 658         // dependency file.
 659
 660         string const logfile = OnlyFilename(ChangeExtension(file, ".log"));
 661
 662         regex reg1("\\)* *\\(([^ )]+).*");
 663         regex reg2("File: ([^ ]+).*");
 664         regex reg3("No file ([^ ]+)\\..*");
 665         regex reg4("\\\\openout[0-9]+.*=.*`([^ ]+)'\\..*");
 666         // If an index should be created, MikTex does not write a line like
 667         //    \openout# = 'sample,idx'.
 668         // but intstead only a line like this into the log:
 669         //   Writing index file sample.idx
 670         regex reg5("Writing index file ([^ ]+).*");
 671         regex unwanted("^.*\\.(aux|log|dvi|bbl|ind|glo)$");
 672
 673         ifstream ifs(logfile.c_str());
 674         while (ifs) {
 675                 // Ok, the scanning of files here is not sufficient.
 676                 // Sometimes files are named by "File: xxx" only
 677                 // So I think we should use some regexps to find files instead.
 678                 // "(\([^ ]+\)"   should match the "(file " variant
 679                 // "File: \([^ ]+\)" should match the "File: file" variant
 680                 string foundfile;
 681                 string token;
 682                 getline(ifs, token);
 683                 token = rtrim(token, "\r");
 684                 if (token.empty()) continue;
 685
 686                 smatch sub;
 687                 if (regex_match(token, sub, reg1)) {
 688                         foundfile = sub[1];
 689                 } else if (regex_match(token, sub, reg2)) {
 690                         foundfile = sub[1];
 691                 } else if (regex_match(token, sub, reg3)) {
 692                         foundfile = sub[1];
 693                 } else if (regex_match(token, sub, reg4)) {
 694                         foundfile = sub[1];
 695                 } else if (regex_match(token, sub, reg5)) {
 696                         foundfile = sub[1];
 697                 } else {
 698                         continue;
 699                 }
 700
 701                 // convert from native os path to unix path
 702                 foundfile = os::internal_path(foundfile);
 703
 704                 lyxerr[Debug::DEPEND] << "Found file: "
 705                                       << foundfile << endl;
 706
 707                 // Ok now we found a file.
 708                 // Now we should make sure that this is a file that we can
 709                 // access through the normal paths.
 710                 // We will not try any fancy search methods to
 711                 // find the file.
 712
 713                 // (1) foundfile is an
 714                 //     absolute path and should
 715                 //     be inserted.
 716                 if (AbsolutePath(foundfile)) {
 717                         lyxerr[Debug::DEPEND] << "AbsolutePath file: "
 718                                               << foundfile << endl;
 719                         // On initial insert we want to do the update at once
 720                         // since this file can not be a file generated by
 721                         // the latex run.
 722                         if (FileInfo(foundfile).exist())
 723                                 head.insert(foundfile, true);
 724                 }
 725
 726                 // (2) foundfile is in the tmpdir
 727                 //     insert it into head
 728                 else if (FileInfo(OnlyFilename(foundfile)).exist()) {
 729                         if (regex_match(foundfile, unwanted)) {
 730                                 lyxerr[Debug::DEPEND]
 731                                         << "We don't want "
 732                                         << OnlyFilename(foundfile)
 733                                         << " in the dep file"
 734                                         << endl;
 735                         } else if (suffixIs(foundfile, ".tex")) {
 736                                 // This is a tex file generated by LyX
 737                                 // and latex is not likely to change this
 738                                 // during its runs.
 739                                 lyxerr[Debug::DEPEND]
 740                                         << "Tmpdir TeX file: "
 741                                         << OnlyFilename(foundfile)
 742                                         << endl;
 743                                 head.insert(foundfile, true);
 744                         } else {
 745                                 lyxerr[Debug::DEPEND]
 746                                         << "In tmpdir file:"
 747                                         << OnlyFilename(foundfile)
 748                                         << endl;
 749                                 head.insert(OnlyFilename(foundfile));
 750                         }
 751                 } else
 752                         lyxerr[Debug::DEPEND]
 753                                 << "Not a file or we are unable to find it."
 754                                 << endl;
 755         }
 756
 757         // Make sure that the main .tex file is in the dependancy file.
 758         head.insert(OnlyFilename(file), true);
 759 }