src/LaTeX.C

   1 /* This file is part of
   2  * ======================================================
   3  *
   4  *           LyX, The Document Processor
   5  *           Copyright 1995 Matthias Ettrich
   6  *           Copyright 1995-2000 The LyX Team.
   7  *
   8  *           This file is Copyright 1996-2000
   9  *           Lars Gullik Bjønnes
  10  *
  11  * ======================================================
  12  */
  13
  14 #include <config.h>
  15
  16 #ifdef __GNUG__
  17 #pragma implementation
  18 #endif
  19 #include <fstream>
  20
  21 #include "support/filetools.h"
  22 #include "LaTeX.h"
  23 #include "support/FileInfo.h"
  24 #include "debug.h"
  25 #include "support/lyxlib.h"
  26 #include "support/syscall.h"
  27 #include "support/syscontr.h"
  28 #include "support/path.h"
  29 #include "support/LRegex.h"
  30 #include "support/LSubstring.h"
  31 #include "bufferlist.h"
  32 #include "minibuffer.h"
  33 #include "gettext.h"
  34 #include "lyx_gui_misc.h"
  35
  36 using std::ifstream;
  37 using std::getline;
  38 using std::endl;
  39 using std::vector;
  40 using std::set;
  41
  42 // TODO: in no particular order
  43 // - get rid of the extern BufferList and the call to
  44 //   BufferList::updateIncludedTeXfiles, this should either
  45 //   be done before calling LaTeX::funcs or in a completely
  46 //   different way.
  47 // - the bibtex command options should be supported.
  48 // - the makeindex style files should be taken care of with
  49 //   the dependency mechanism.
  50 // - makeindex commandline options should be supported
  51 // - somewhere support viewing of bibtex and makeindex log files.
  52 // - we should perhaps also scan the bibtex log file
  53 // - we should perhaps also scan the bibtex log file
  54
  55 extern BufferList bufferlist;
  56
  57 /*
  58  * CLASS TEXERRORS
  59  */
  60
  61 void TeXErrors::insertError(int line, string const & error_desc,
  62                             string const & error_text)
  63 {
  64         Error newerr(line, error_desc, error_text);
  65         errors.push_back(newerr);
  66 }
  67
  68 /*
  69  * CLASS LaTeX
  70  */
  71
  72 LaTeX::LaTeX(string const & latex, string const & f, string const & p)
  73                 : cmd(latex), file(f), path(p)
  74 {
  75         num_errors = 0;
  76         depfile = file + ".dep";
  77         if (prefixIs(cmd, "pdf")) // Do we use pdflatex ?
  78                 depfile += "-pdf";
  79 }
  80
  81
  82 void LaTeX::deleteFilesOnError() const
  83 {
  84         // currently just a dummy function.
  85
  86         // What files do we have to delete?
  87
  88         // This will at least make latex do all the runs
  89         lyx::unlink(depfile);
  90
  91         // but the reason for the error might be in a generated file...
  92
  93         string ofname = OnlyFilename(file);
  94
  95         // bibtex file
  96         string bbl = ChangeExtension(ofname, ".bbl");
  97         lyx::unlink(bbl);
  98
  99         // makeindex file
 100         string ind = ChangeExtension(ofname, ".ind");
 101         lyx::unlink(ind);
 102
 103         // Also remove the aux file
 104         string aux = ChangeExtension(ofname, ".aux");
 105         lyx::unlink(aux);
 106 }
 107
 108
 109 int LaTeX::run(TeXErrors & terr, MiniBuffer * minib)
 110         // We know that this function will only be run if the lyx buffer
 111         // has been changed. We also know that a newly written .tex file
 112         // is always different from the previous one because of the date
 113         // in it. However it seems safe to run latex (at least) on time each
 114         // time the .tex file changes.
 115 {
 116         int scanres = LaTeX::NO_ERRORS;
 117         unsigned int count = 0; // number of times run
 118         num_errors = 0; // just to make sure.
 119         const unsigned int MAX_RUN = 6;
 120         DepTable head; // empty head
 121         bool rerun = false; // rerun requested
 122
 123         // The class LaTeX does not know the temp path.
 124         bufferlist.updateIncludedTeXfiles(lyx::getcwd()); //GetCWD());
 125
 126         // Never write the depfile if an error was encountered.
 127
 128         // 0
 129         // first check if the file dependencies exist:
 130         //     ->If it does exist
 131         //             check if any of the files mentioned in it have
 132         //             changed (done using a checksum).
 133         //                 -> if changed:
 134         //                        run latex once and
 135         //                        remake the dependency file
 136         //                 -> if not changed:
 137         //                        just return there is nothing to do for us.
 138         //     ->if it doesn't exist
 139         //             make it and
 140         //             run latex once (we need to run latex once anyway) and
 141         //             remake the dependency file.
 142         //
 143
 144         FileInfo fi(depfile);
 145         bool had_depfile = fi.exist();
 146         bool run_bibtex = false;
 147         string aux_file = OnlyFilename(ChangeExtension(file, "aux"));
 148
 149         if (had_depfile) {
 150                 lyxerr[Debug::DEPEND] << "Dependency file exists" << endl;
 151                 // Read the dep file:
 152                 head.read(depfile);
 153                 // Update the checksums
 154                 head.update();
 155                 if (!head.sumchange()) {
 156                         lyxerr[Debug::DEPEND] << "return no_change" << endl;
 157                         return LaTeX::NO_CHANGE;
 158                 }
 159                 lyxerr[Debug::DEPEND]
 160                         << "Dependency file has changed" << endl;
 161
 162                 if (head.extchanged(".bib") || head.extchanged(".bst"))
 163                         run_bibtex = true;
 164         } else
 165                 lyxerr[Debug::DEPEND]
 166                         << "Dependency file does not exist" << endl;
 167
 168         /// We scan the aux file even when had_depfile = false,
 169         /// because we can run pdflatex on the file after running latex on it,
 170         /// in which case we will not need to run bibtex again.
 171         vector<Aux_Info> bibtex_info_old;
 172         if (!run_bibtex)
 173                 bibtex_info_old = scanAuxFiles(aux_file);
 174
 175         ++count;
 176         lyxerr[Debug::LATEX] << "Run #" << count << endl;
 177         WriteStatus(minib, string(_("LaTeX run number ")) + tostr(count));
 178         this->operator()();
 179         scanres = scanLogFile(terr);
 180         if (scanres & LaTeX::ERROR_RERUN) {
 181                 lyxerr[Debug::LATEX] << "Rerunning LaTeX" << endl;
 182                 this->operator()();
 183                 scanres = scanLogFile(terr);
 184         }
 185
 186         if (scanres & LaTeX::ERRORS) {
 187                 deleteFilesOnError();
 188                 return scanres; // return on error
 189         }
 190
 191         vector<Aux_Info> const bibtex_info = scanAuxFiles(aux_file);
 192         if (!run_bibtex && bibtex_info_old != bibtex_info)
 193                 run_bibtex = true;
 194
 195         // update the dependencies.
 196         deplog(head); // reads the latex log
 197         head.update();
 198
 199         // 0.5
 200         // At this point we must run external programs if needed.
 201         // makeindex will be run if a .idx file changed or was generated.
 202         // And if there were undefined citations or changes in references
 203         // the .aux file is checked for signs of bibtex. Bibtex is then run
 204         // if needed.
 205
 206         // run makeindex
 207         if (head.haschanged(OnlyFilename(ChangeExtension(file, ".idx")))) {
 208                 // no checks for now
 209                 lyxerr[Debug::LATEX] << "Running MakeIndex." << endl;
 210                 WriteStatus(minib, _("Running MakeIndex."));
 211                 rerun = runMakeIndex(OnlyFilename(ChangeExtension(file, ".idx")));
 212         }
 213
 214         // run bibtex
 215         if (scanres & LaTeX::UNDEF_CIT
 216             || scanres & LaTeX::RERUN
 217             || run_bibtex) {
 218                 // Here we must scan the .aux file and look for
 219                 // "\bibdata" and/or "\bibstyle". If one of those
 220                 // tags is found -> run bibtex and set rerun = true;
 221                 // no checks for now
 222                 lyxerr[Debug::LATEX] << "Running BibTeX." << endl;
 223                 WriteStatus(minib, _("Running BibTeX."));
 224                 updateBibtexDependencies(head, bibtex_info);
 225                 rerun |= runBibTeX(bibtex_info);
 226         } else if (!had_depfile)
 227                 /// If we run pdflatex on the file after running latex on it,
 228                 /// then we do not need to run bibtex, but we do need to
 229                 /// insert the .bib and .bst files into the .dep-pdf file.
 230                 updateBibtexDependencies(head, bibtex_info);
 231
 232         // 1
 233         // we know on this point that latex has been run once (or we just
 234         // returned) and the question now is to decide if we need to run
 235         // it any more. This is done by asking if any of the files in the
 236         // dependency file has changed. (remember that the checksum for
 237         // a given file is reported to have changed if it just was created)
 238         //     -> if changed or rerun == true:
 239         //             run latex once more and
 240         //             update the dependency structure
 241         //     -> if not changed:
 242         //             we does nothing at this point
 243         //
 244         if (rerun || head.sumchange()) {
 245                 rerun = false;
 246                 ++count;
 247                 lyxerr[Debug::DEPEND]
 248                         << "Dep. file has changed or rerun requested" << endl;
 249                 lyxerr[Debug::LATEX]
 250                         << "Run #" << count << endl;
 251                 WriteStatus(minib,
 252                             string(_("LaTeX run number ")) + tostr(count));
 253                 this->operator()();
 254                 scanres = scanLogFile(terr);
 255                 if (scanres & LaTeX::ERRORS) {
 256                         deleteFilesOnError();
 257                         return scanres; // return on error
 258                 }
 259
 260                 // update the depedencies
 261                 deplog(head); // reads the latex log
 262                 head.update();
 263         } else {
 264                 lyxerr[Debug::DEPEND] << "Dep. file has NOT changed" << endl;
 265         }
 266
 267         // 1.5
 268         // The inclusion of files generated by external programs like
 269         // makeindex or bibtex might have done changes to pagenumbereing,
 270         // etc. And because of this we must run the external programs
 271         // again to make sure everything is redone correctly.
 272         // Also there should be no need to run the external programs any
 273         // more after this.
 274
 275         // run makeindex if the <file>.idx has changed or was generated.
 276         if (head.haschanged(OnlyFilename(ChangeExtension(file, ".idx")))) {
 277                 // no checks for now
 278                 lyxerr[Debug::LATEX] << "Running MakeIndex." << endl;
 279                 WriteStatus(minib, _("Running MakeIndex."));
 280                 rerun = runMakeIndex(OnlyFilename(ChangeExtension(file, ".idx")));
 281         }
 282
 283         // 2
 284         // we will only run latex more if the log file asks for it.
 285         // or if the sumchange() is true.
 286         //     -> rerun asked for:
 287         //             run latex and
 288         //             remake the dependency file
 289         //             goto 2 or return if max runs are reached.
 290         //     -> rerun not asked for:
 291         //             just return (fall out of bottom of func)
 292         //
 293         while ((head.sumchange() || rerun || (scanres & LaTeX::RERUN))
 294                && count < MAX_RUN) {
 295                 // Yes rerun until message goes away, or until
 296                 // MAX_RUNS are reached.
 297                 rerun = false;
 298                 ++count;
 299                 lyxerr[Debug::LATEX] << "Run #" << count << endl;
 300                 WriteStatus(minib, string(_("LaTeX run number ")) + tostr(count));
 301                 this->operator()();
 302                 scanres = scanLogFile(terr);
 303                 if (scanres & LaTeX::ERRORS) {
 304                         deleteFilesOnError();
 305                         return scanres; // return on error
 306                 }
 307
 308                 // keep this updated
 309                 head.update();
 310         }
 311
 312         // Write the dependencies to file.
 313         head.write(depfile);
 314         lyxerr[Debug::LATEX] << "Done." << endl;
 315         return scanres;
 316 }
 317
 318
 319 int LaTeX::operator()()
 320 {
 321 #ifndef __EMX__
 322         string tmp = cmd + ' ' + QuoteName(file) + " > /dev/null";
 323 #else // cmd.exe (OS/2) causes SYS0003 error at "/dev/null"
 324         string tmp = cmd + ' ' + file + " > nul";
 325 #endif
 326         Systemcalls one;
 327         return one.startscript(Systemcalls::System, tmp);
 328 }
 329
 330
 331 bool LaTeX::runMakeIndex(string const & f)
 332 {
 333         lyxerr[Debug::LATEX] << "idx file has been made,"
 334                 " running makeindex on file "
 335                              <<  f << endl;
 336
 337         // It should be possible to set the switches for makeindex
 338         // sorting style and such. It would also be very convenient
 339         // to be able to make style files from within LyX. This has
 340         // to come for a later time. (0.13 perhaps?)
 341         string tmp = "makeindex -c -q ";
 342         tmp += f;
 343         Systemcalls one;
 344         one.startscript(Systemcalls::System, tmp);
 345         return true;
 346 }
 347
 348
 349 vector<Aux_Info> const
 350 LaTeX::scanAuxFiles(string const & file)
 351 {
 352         vector<Aux_Info> result;
 353
 354         result.push_back(scanAuxFile(file));
 355
 356         for (int i = 1; i < 1000; ++i) {
 357                 string file2 = ChangeExtension(file, "") + "." + tostr(i)
 358                         + ".aux";
 359                 FileInfo fi(file2);
 360                 if (!fi.exist())
 361                         break;
 362                 result.push_back(scanAuxFile(file2));
 363         }
 364         return result;
 365 }
 366
 367
 368 Aux_Info const LaTeX::scanAuxFile(string const & file)
 369 {
 370         Aux_Info result;
 371         result.aux_file = file;
 372         scanAuxFile(file, result);
 373         return result;
 374 }
 375
 376
 377 void LaTeX::scanAuxFile(string const & file, Aux_Info & aux_info)
 378 {
 379         lyxerr[Debug::LATEX] << "Scanning aux file: " << file << endl;
 380
 381         ifstream ifs(file.c_str());
 382         string token;
 383         LRegex reg1("\\\\citation\\{([^}]+)\\}");
 384         LRegex reg2("\\\\bibdata\\{([^}]+)\\}");
 385         LRegex reg3("\\\\bibstyle\\{([^}]+)\\}");
 386         LRegex reg4("\\\\@input\\{([^}]+)\\}");
 387
 388         while (getline(ifs, token)) {
 389                 if (reg1.exact_match(token)) {
 390                         LRegex::SubMatches const & sub = reg1.exec(token);
 391                         string data = LSubstring(token, sub[1].first,
 392                                                  sub[1].second);
 393                         while (!data.empty()) {
 394                                 string citation;
 395                                 data = split(data, citation, ',');
 396                                 lyxerr[Debug::LATEX] << "Citation: "
 397                                                      << citation << endl;
 398                                 aux_info.citations.insert(citation);
 399                         }
 400                 } else if (reg2.exact_match(token)) {
 401                         LRegex::SubMatches const & sub = reg2.exec(token);
 402                         string data = LSubstring(token, sub[1].first,
 403                                                  sub[1].second);
 404                         // data is now all the bib files separated by ','
 405                         // get them one by one and pass them to the helper
 406                         while (!data.empty()) {
 407                                 string database;
 408                                 data = split(data, database, ',');
 409                                 database = ChangeExtension(database, "bib");
 410                                 lyxerr[Debug::LATEX] << "Bibtex database: `"
 411                                                      << database << "'" << endl;
 412                                 aux_info.databases.insert(database);
 413                         }
 414                 } else if (reg3.exact_match(token)) {
 415                         LRegex::SubMatches const & sub = reg3.exec(token);
 416                         string style = LSubstring(token, sub[1].first,
 417                                                   sub[1].second);
 418                         // token is now the style file
 419                         // pass it to the helper
 420                         style = ChangeExtension(style, "bst");
 421                         lyxerr[Debug::LATEX] << "Bibtex style: `"
 422                                              << style << "'" << endl;
 423                         aux_info.styles.insert(style);
 424                 } else if (reg4.exact_match(token)) {
 425                         LRegex::SubMatches const & sub = reg4.exec(token);
 426                         string file2 = LSubstring(token, sub[1].first,
 427                                                   sub[1].second);
 428                         scanAuxFile(file2, aux_info);
 429                 }
 430         }
 431 }
 432
 433
 434 void LaTeX::updateBibtexDependencies(DepTable & dep,
 435                                      vector<Aux_Info> const & bibtex_info)
 436 {
 437         // Since a run of Bibtex mandates more latex runs it is ok to
 438         // remove all ".bib" and ".bst" files.
 439         dep.remove_files_with_extension(".bib");
 440         dep.remove_files_with_extension(".bst");
 441         string aux = OnlyFilename(ChangeExtension(file, ".aux"));
 442
 443         for (vector<Aux_Info>::const_iterator it = bibtex_info.begin();
 444              it != bibtex_info.end(); ++it) {
 445                 for (set<string>::const_iterator it2 = it->databases.begin();
 446                      it2 != it->databases.end(); ++it2) {
 447                         string file = findtexfile(*it2, "bib");
 448                         if (!file.empty())
 449                                 dep.insert(file, true);
 450                 }
 451
 452                 for (set<string>::const_iterator it2 = it->styles.begin();
 453                      it2 != it->styles.end(); ++it2) {
 454                         string file = findtexfile(*it2, "bst");
 455                         if (!file.empty())
 456                                 dep.insert(file, true);
 457                 }
 458         }
 459 }
 460
 461
 462 bool LaTeX::runBibTeX(vector<Aux_Info> const & bibtex_info)
 463 {
 464         bool result = false;
 465         for (vector<Aux_Info>::const_iterator it = bibtex_info.begin();
 466              it != bibtex_info.end(); ++it) {
 467                 if (it->databases.empty())
 468                         continue;
 469                 result = true;
 470
 471                 string tmp = "bibtex ";
 472                 tmp += OnlyFilename(ChangeExtension(it->aux_file, string()));
 473                 Systemcalls one;
 474                 one.startscript(Systemcalls::System, tmp);
 475         }
 476         // Return whether bibtex was run
 477         return result;
 478 }
 479
 480
 481 int LaTeX::scanLogFile(TeXErrors & terr)
 482 {
 483         int last_line = -1;
 484         int line_count = 1;
 485         int retval = NO_ERRORS;
 486         string tmp = OnlyFilename(ChangeExtension(file, ".log"));
 487         lyxerr[Debug::LATEX] << "Log file: " << tmp << endl;
 488         ifstream ifs(tmp.c_str());
 489
 490         string token;
 491         while (getline(ifs, token)) {
 492                 lyxerr[Debug::LATEX] << "Log line: " << token << endl;
 493
 494                 if (token.empty())
 495                         continue;
 496
 497                 if (prefixIs(token, "LaTeX Warning:")) {
 498                         // Here shall we handle different
 499                         // types of warnings
 500                         retval |= LATEX_WARNING;
 501                         lyxerr[Debug::LATEX] << "LaTeX Warning." << endl;
 502                         if (contains(token, "Rerun to get cross-references")) {
 503                                 retval |= RERUN;
 504                                 lyxerr[Debug::LATEX]
 505                                         << "We should rerun." << endl;
 506                         } else if (contains(token, "Citation")
 507                                    && contains(token, "on page")
 508                                    && contains(token, "undefined")) {
 509                                 retval |= UNDEF_CIT;
 510                         }
 511                 } else if (prefixIs(token, "Package")) {
 512                         // Package warnings
 513                         retval |= PACKAGE_WARNING;
 514                         if (contains(token, "natbib Warning:")) {
 515                                 // Natbib warnings
 516                                 if (contains(token, "Citation")
 517                                     && contains(token, "on page")
 518                                     && contains(token, "undefined")) {
 519                                         retval |= UNDEF_CIT;
 520                                 }
 521                         } else if (contains(token, "run BibTeX")) {
 522                                 retval |= UNDEF_CIT;
 523                         } else if (contains(token, "Rerun LaTeX.")) {
 524                                 // at least longtable.sty might use this.
 525                                 retval |= RERUN;
 526                         }
 527                 } else if (prefixIs(token, "! ")) {
 528                         // Ok, we have something that looks like a TeX Error
 529                         // but what do we really have.
 530
 531                         // Just get the error description:
 532                         string desc(token, 2);
 533                         if (contains(token, "LaTeX Error:"))
 534                                 retval |= LATEX_ERROR;
 535                         // get the next line
 536                         string tmp;
 537                         int count = 0;
 538                         do {
 539                                 if (!getline(ifs, tmp))
 540                                         break;
 541                                 if (++count > 10)
 542                                         break;
 543                         } while (!prefixIs(tmp, "l."));
 544                         if (prefixIs(tmp, "l.")) {
 545                                 // we have a latex error
 546                                 retval |=  TEX_ERROR;
 547                                 if (contains(desc, "Package babel Error: You haven't defined the language"))
 548                                         retval |= ERROR_RERUN;
 549                                 // get the line number:
 550                                 int line = 0;
 551                                 sscanf(tmp.c_str(), "l.%d", &line);
 552                                 // get the rest of the message:
 553                                 string errstr(tmp, tmp.find(' '));
 554                                 errstr += '\n';
 555                                 getline(ifs, tmp);
 556                                 while (!contains(errstr, "l.")
 557                                        && !tmp.empty()
 558                                        && !prefixIs(tmp, "! ")
 559                                        && !contains(tmp, "(job aborted")) {
 560                                         errstr += tmp;
 561                                         errstr += "\n";
 562                                         getline(ifs, tmp);
 563                                 }
 564                                 lyxerr[Debug::LATEX]
 565                                         << "line: " << line << '\n'
 566                                         << "Desc: " << desc << '\n'
 567                                         << "Text: " << errstr << endl;
 568                                 if (line == last_line)
 569                                         ++line_count;
 570                                 else {
 571                                         line_count = 1;
 572                                         last_line = line;
 573                                 }
 574                                 if (line_count <= 5) {
 575                                         terr.insertError(line, desc, errstr);
 576                                         ++num_errors;
 577                                 }
 578                         }
 579                 } else {
 580                         // information messages, TeX warnings and other
 581                         // warnings we have not caught earlier.
 582                         if (prefixIs(token, "Overfull ")) {
 583                                 retval |= TEX_WARNING;
 584                         } else if (prefixIs(token, "Underfull ")) {
 585                                 retval |= TEX_WARNING;
 586                         } else if (contains(token, "Rerun to get citations")) {
 587                                 // Natbib seems to use this.
 588                                 retval |= RERUN;
 589                         } else if (contains(token, "No pages of output")) {
 590                                 // A dvi file was not created
 591                                 retval |= NO_OUTPUT;
 592                         } else if (contains(token, "That makes 100 errors")) {
 593                                 // More than 100 errors were reprted
 594                                 retval |= TOO_MANY_ERRORS;
 595                         }
 596                 }
 597         }
 598         lyxerr[Debug::LATEX] << "Log line: " << token << endl;
 599         return retval;
 600 }
 601
 602
 603 void LaTeX::deplog(DepTable & head)
 604 {
 605         // This function reads the LaTeX log file end extracts all the external
 606         // files used by the LaTeX run. The files are then entered into the
 607         // dependency file.
 608
 609         string logfile = OnlyFilename(ChangeExtension(file, ".log"));
 610
 611         LRegex reg1(")* *\\(([^ \\)]+).*");
 612         LRegex reg2("File: ([^ ]+).*");
 613         LRegex reg3("No file ([^ ]+)\\..*");
 614         LRegex reg4("\\\\openout[0-9]+.*=.*`([^ ]+)'\\..*");
 615         LRegex unwanted("^.*\\.(aux|log|dvi|bbl|ind|glo)$");
 616
 617         ifstream ifs(logfile.c_str());
 618         while (ifs) {
 619                 // Ok, the scanning of files here is not sufficient.
 620                 // Sometimes files are named by "File: xxx" only
 621                 // So I think we should use some regexps to find files instead.
 622                 // "(\([^ ]+\)"   should match the "(file " variant
 623                 // "File: \([^ ]+\)" should match the "File: file" variant
 624                 string foundfile;
 625                 string token;
 626                 getline(ifs, token);
 627                 if (token.empty()) continue;
 628
 629                 if (reg1.exact_match(token)) {
 630                         LRegex::SubMatches const & sub = reg1.exec(token);
 631                         foundfile = LSubstring(token, sub[1].first,
 632                                                sub[1].second);
 633                 } else if (reg2.exact_match(token)) {
 634                         LRegex::SubMatches const & sub = reg2.exec(token);
 635                         foundfile = LSubstring(token, sub[1].first,
 636                                                sub[1].second);
 637                 } else if (reg3.exact_match(token)) {
 638                         LRegex::SubMatches const & sub = reg3.exec(token);
 639                         foundfile = LSubstring(token, sub[1].first,
 640                                                sub[1].second);
 641                 } else if (reg4.exact_match(token)) {
 642                         LRegex::SubMatches const & sub = reg4.exec(token);
 643                         foundfile = LSubstring(token, sub[1].first,
 644                                                sub[1].second);
 645                 } else {
 646                         continue;
 647                 }
 648
 649                 lyxerr[Debug::DEPEND] << "Found file: "
 650                                       << foundfile << endl;
 651
 652                 // Ok now we found a file.
 653                 // Now we should make sure that this is a file that we can
 654                 // access through the normal paths.
 655                 // We will not try any fancy search methods to
 656                 // find the file.
 657
 658                 // (1) foundfile is an
 659                 //     absolute path and should
 660                 //     be inserted.
 661                 if (AbsolutePath(foundfile)) {
 662                         lyxerr[Debug::DEPEND] << "AbsolutePath file: "
 663                                               << foundfile << endl;
 664                         // On initial insert we want to do the update at once
 665                         // since this file can not be a file generated by
 666                         // the latex run.
 667                         head.insert(foundfile, true);
 668                         continue;
 669                 }
 670
 671                 // (2) foundfile is in the tmpdir
 672                 //     insert it into head
 673                 if (FileInfo(OnlyFilename(foundfile)).exist()) {
 674                         if (unwanted.exact_match(foundfile)) {
 675                                 lyxerr[Debug::DEPEND]
 676                                         << "We don't want "
 677                                         << OnlyFilename(foundfile)
 678                                         << " in the dep file"
 679                                         << endl;
 680                         } else if (suffixIs(foundfile, ".tex")) {
 681                                 // This is a tex file generated by LyX
 682                                 // and latex is not likely to change this
 683                                 // during its runs.
 684                                 lyxerr[Debug::DEPEND]
 685                                         << "Tmpdir TeX file: "
 686                                         << OnlyFilename(foundfile)
 687                                         << endl;
 688                                 head.insert(foundfile, true);
 689                         } else {
 690                                 lyxerr[Debug::DEPEND]
 691                                         << "In tmpdir file:"
 692                                         << OnlyFilename(foundfile)
 693                                         << endl;
 694                                 head.insert(OnlyFilename(foundfile));
 695                         }
 696                         continue;
 697                 }
 698                 lyxerr[Debug::DEPEND]
 699                         << "Not a file or we are unable to find it."
 700                         << endl;
 701         }
 702 }