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