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 "gettext.h"
  33 #include "lyx_gui_misc.h"
  34 #include "lyxfunc.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, LyXFunc * lfun)
 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 = 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 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         lfun->Dispatch(LFUN_MESSAGE, _("LaTeX run number") + ' ' + tostr(count));
 178
 179         //WriteStatus(lfun, string(_("LaTeX run number ")) + tostr(count));
 180         this->operator()();
 181         scanres = scanLogFile(terr);
 182         if (scanres & ERROR_RERUN) {
 183                 lyxerr[Debug::LATEX] << "Rerunning LaTeX" << endl;
 184                 this->operator()();
 185                 scanres = scanLogFile(terr);
 186         }
 187
 188         if (scanres & ERRORS) {
 189                 deleteFilesOnError();
 190                 return scanres; // return on error
 191         }
 192
 193         vector<Aux_Info> const bibtex_info = scanAuxFiles(aux_file);
 194         if (!run_bibtex && bibtex_info_old != bibtex_info)
 195                 run_bibtex = true;
 196
 197         // update the dependencies.
 198         deplog(head); // reads the latex log
 199         head.update();
 200
 201         // 0.5
 202         // At this point we must run external programs if needed.
 203         // makeindex will be run if a .idx file changed or was generated.
 204         // And if there were undefined citations or changes in references
 205         // the .aux file is checked for signs of bibtex. Bibtex is then run
 206         // if needed.
 207
 208         // run makeindex
 209         if (head.haschanged(OnlyFilename(ChangeExtension(file, ".idx")))) {
 210                 // no checks for now
 211                 lyxerr[Debug::LATEX] << "Running MakeIndex." << endl;
 212                 lfun->Dispatch(LFUN_MESSAGE, _("Running MakeIndex."));
 213 //              WriteStatus(minib, _("Running MakeIndex."));
 214                 rerun = runMakeIndex(OnlyFilename(ChangeExtension(file, ".idx")));
 215         }
 216
 217         // run bibtex
 218         // if (scanres & UNDEF_CIT || scanres & RERUN || run_bibtex)
 219         if (scanres & UNDEF_CIT || run_bibtex) {
 220                 // Here we must scan the .aux file and look for
 221                 // "\bibdata" and/or "\bibstyle". If one of those
 222                 // tags is found -> run bibtex and set rerun = true;
 223                 // no checks for now
 224                 lyxerr[Debug::LATEX] << "Running BibTeX." << endl;
 225                 lfun->Dispatch(LFUN_MESSAGE, _("Running BibTeX."));
 226                 //WriteStatus(minib, _("Running BibTeX."));
 227                 updateBibtexDependencies(head, bibtex_info);
 228                 rerun |= runBibTeX(bibtex_info);
 229         } else if (!had_depfile)
 230                 /// If we run pdflatex on the file after running latex on it,
 231                 /// then we do not need to run bibtex, but we do need to
 232                 /// insert the .bib and .bst files into the .dep-pdf file.
 233                 updateBibtexDependencies(head, bibtex_info);
 234
 235         // 1
 236         // we know on this point that latex has been run once (or we just
 237         // returned) and the question now is to decide if we need to run
 238         // it any more. This is done by asking if any of the files in the
 239         // dependency file has changed. (remember that the checksum for
 240         // a given file is reported to have changed if it just was created)
 241         //     -> if changed or rerun == true:
 242         //             run latex once more and
 243         //             update the dependency structure
 244         //     -> if not changed:
 245         //             we does nothing at this point
 246         //
 247         if (rerun || head.sumchange()) {
 248                 rerun = false;
 249                 ++count;
 250                 lyxerr[Debug::DEPEND]
 251                         << "Dep. file has changed or rerun requested" << endl;
 252                 lyxerr[Debug::LATEX]
 253                         << "Run #" << count << endl;
 254                 lfun->Dispatch(LFUN_MESSAGE, _("LaTeX run number") + ' ' + tostr(count));
 255 //              WriteStatus(minib,
 256 //                          string(_("LaTeX run number ")) + tostr(count));
 257                 this->operator()();
 258                 scanres = scanLogFile(terr);
 259                 if (scanres & ERRORS) {
 260                         deleteFilesOnError();
 261                         return scanres; // return on error
 262                 }
 263
 264                 // update the depedencies
 265                 deplog(head); // reads the latex log
 266                 head.update();
 267         } else {
 268                 lyxerr[Debug::DEPEND] << "Dep. file has NOT changed" << endl;
 269         }
 270
 271         // 1.5
 272         // The inclusion of files generated by external programs like
 273         // makeindex or bibtex might have done changes to pagenumbereing,
 274         // etc. And because of this we must run the external programs
 275         // again to make sure everything is redone correctly.
 276         // Also there should be no need to run the external programs any
 277         // more after this.
 278
 279         // run makeindex if the <file>.idx has changed or was generated.
 280         if (head.haschanged(OnlyFilename(ChangeExtension(file, ".idx")))) {
 281                 // no checks for now
 282                 lyxerr[Debug::LATEX] << "Running MakeIndex." << endl;
 283                 lfun->Dispatch(LFUN_MESSAGE, _("Running MakeIndex."));
 284                 //WriteStatus(minib, _("Running MakeIndex."));
 285                 rerun = runMakeIndex(OnlyFilename(ChangeExtension(file, ".idx")));
 286         }
 287
 288         // 2
 289         // we will only run latex more if the log file asks for it.
 290         // or if the sumchange() is true.
 291         //     -> rerun asked for:
 292         //             run latex and
 293         //             remake the dependency file
 294         //             goto 2 or return if max runs are reached.
 295         //     -> rerun not asked for:
 296         //             just return (fall out of bottom of func)
 297         //
 298         while ((head.sumchange() || rerun || (scanres & RERUN))
 299                && count < MAX_RUN) {
 300                 // Yes rerun until message goes away, or until
 301                 // MAX_RUNS are reached.
 302                 rerun = false;
 303                 ++count;
 304                 lyxerr[Debug::LATEX] << "Run #" << count << endl;
 305                 lfun->Dispatch(LFUN_MESSAGE, _("LaTeX run numger") + ' ' + tostr(count));
 306 //              WriteStatus(minib, string(_("LaTeX run number ")) + tostr(count));
 307                 this->operator()();
 308                 scanres = scanLogFile(terr);
 309                 if (scanres & ERRORS) {
 310                         deleteFilesOnError();
 311                         return scanres; // return on error
 312                 }
 313
 314                 // keep this updated
 315                 head.update();
 316         }
 317
 318         // Write the dependencies to file.
 319         head.write(depfile);
 320         lyxerr[Debug::LATEX] << "Done." << endl;
 321         return scanres;
 322 }
 323
 324
 325 int LaTeX::operator()()
 326 {
 327 #ifndef __EMX__
 328         string tmp = cmd + ' ' + QuoteName(file) + " > /dev/null";
 329 #else // cmd.exe (OS/2) causes SYS0003 error at "/dev/null"
 330         string tmp = cmd + ' ' + file + " > nul";
 331 #endif
 332         Systemcalls one;
 333         return one.startscript(Systemcalls::System, tmp);
 334 }
 335
 336
 337 bool LaTeX::runMakeIndex(string const & f)
 338 {
 339         lyxerr[Debug::LATEX] << "idx file has been made,"
 340                 " running makeindex on file "
 341                              <<  f << endl;
 342
 343         // It should be possible to set the switches for makeindex
 344         // sorting style and such. It would also be very convenient
 345         // to be able to make style files from within LyX. This has
 346         // to come for a later time. (0.13 perhaps?)
 347         string tmp = "makeindex -c -q ";
 348         tmp += f;
 349         Systemcalls one;
 350         one.startscript(Systemcalls::System, tmp);
 351         return true;
 352 }
 353
 354
 355 vector<Aux_Info> const
 356 LaTeX::scanAuxFiles(string const & file)
 357 {
 358         vector<Aux_Info> result;
 359
 360         result.push_back(scanAuxFile(file));
 361
 362         for (int i = 1; i < 1000; ++i) {
 363                 string file2 = ChangeExtension(file, "") + "." + tostr(i)
 364                         + ".aux";
 365                 FileInfo fi(file2);
 366                 if (!fi.exist())
 367                         break;
 368                 result.push_back(scanAuxFile(file2));
 369         }
 370         return result;
 371 }
 372
 373
 374 Aux_Info const LaTeX::scanAuxFile(string const & file)
 375 {
 376         Aux_Info result;
 377         result.aux_file = file;
 378         scanAuxFile(file, result);
 379         return result;
 380 }
 381
 382
 383 void LaTeX::scanAuxFile(string const & file, Aux_Info & aux_info)
 384 {
 385         lyxerr[Debug::LATEX] << "Scanning aux file: " << file << endl;
 386
 387         ifstream ifs(file.c_str());
 388         string token;
 389         LRegex reg1("\\\\citation\\{([^}]+)\\}");
 390         LRegex reg2("\\\\bibdata\\{([^}]+)\\}");
 391         LRegex reg3("\\\\bibstyle\\{([^}]+)\\}");
 392         LRegex reg4("\\\\@input\\{([^}]+)\\}");
 393
 394         while (getline(ifs, token)) {
 395                 if (reg1.exact_match(token)) {
 396                         LRegex::SubMatches const & sub = reg1.exec(token);
 397                         string data = LSubstring(token, sub[1].first,
 398                                                  sub[1].second);
 399                         while (!data.empty()) {
 400                                 string citation;
 401                                 data = split(data, citation, ',');
 402                                 lyxerr[Debug::LATEX] << "Citation: "
 403                                                      << citation << endl;
 404                                 aux_info.citations.insert(citation);
 405                         }
 406                 } else if (reg2.exact_match(token)) {
 407                         LRegex::SubMatches const & sub = reg2.exec(token);
 408                         string data = LSubstring(token, sub[1].first,
 409                                                  sub[1].second);
 410                         // data is now all the bib files separated by ','
 411                         // get them one by one and pass them to the helper
 412                         while (!data.empty()) {
 413                                 string database;
 414                                 data = split(data, database, ',');
 415                                 database = ChangeExtension(database, "bib");
 416                                 lyxerr[Debug::LATEX] << "Bibtex database: `"
 417                                                      << database << "'" << endl;
 418                                 aux_info.databases.insert(database);
 419                         }
 420                 } else if (reg3.exact_match(token)) {
 421                         LRegex::SubMatches const & sub = reg3.exec(token);
 422                         string style = LSubstring(token, sub[1].first,
 423                                                   sub[1].second);
 424                         // token is now the style file
 425                         // pass it to the helper
 426                         style = ChangeExtension(style, "bst");
 427                         lyxerr[Debug::LATEX] << "Bibtex style: `"
 428                                              << style << "'" << endl;
 429                         aux_info.styles.insert(style);
 430                 } else if (reg4.exact_match(token)) {
 431                         LRegex::SubMatches const & sub = reg4.exec(token);
 432                         string file2 = LSubstring(token, sub[1].first,
 433                                                   sub[1].second);
 434                         scanAuxFile(file2, aux_info);
 435                 }
 436         }
 437 }
 438
 439
 440 void LaTeX::updateBibtexDependencies(DepTable & dep,
 441                                      vector<Aux_Info> const & bibtex_info)
 442 {
 443         // Since a run of Bibtex mandates more latex runs it is ok to
 444         // remove all ".bib" and ".bst" files.
 445         dep.remove_files_with_extension(".bib");
 446         dep.remove_files_with_extension(".bst");
 447         string aux = OnlyFilename(ChangeExtension(file, ".aux"));
 448
 449         for (vector<Aux_Info>::const_iterator it = bibtex_info.begin();
 450              it != bibtex_info.end(); ++it) {
 451                 for (set<string>::const_iterator it2 = it->databases.begin();
 452                      it2 != it->databases.end(); ++it2) {
 453                         string file = findtexfile(*it2, "bib");
 454                         if (!file.empty())
 455                                 dep.insert(file, true);
 456                 }
 457
 458                 for (set<string>::const_iterator it2 = it->styles.begin();
 459                      it2 != it->styles.end(); ++it2) {
 460                         string file = findtexfile(*it2, "bst");
 461                         if (!file.empty())
 462                                 dep.insert(file, true);
 463                 }
 464         }
 465 }
 466
 467
 468 bool LaTeX::runBibTeX(vector<Aux_Info> const & bibtex_info)
 469 {
 470         bool result = false;
 471         for (vector<Aux_Info>::const_iterator it = bibtex_info.begin();
 472              it != bibtex_info.end(); ++it) {
 473                 if (it->databases.empty())
 474                         continue;
 475                 result = true;
 476
 477                 string tmp = "bibtex ";
 478                 tmp += OnlyFilename(ChangeExtension(it->aux_file, string()));
 479                 Systemcalls one;
 480                 one.startscript(Systemcalls::System, tmp);
 481         }
 482         // Return whether bibtex was run
 483         return result;
 484 }
 485
 486
 487 int LaTeX::scanLogFile(TeXErrors & terr)
 488 {
 489         int last_line = -1;
 490         int line_count = 1;
 491         int retval = NO_ERRORS;
 492         string tmp = OnlyFilename(ChangeExtension(file, ".log"));
 493         lyxerr[Debug::LATEX] << "Log file: " << tmp << endl;
 494         ifstream ifs(tmp.c_str());
 495
 496         string token;
 497         while (getline(ifs, token)) {
 498                 lyxerr[Debug::LATEX] << "Log line: " << token << endl;
 499
 500                 if (token.empty())
 501                         continue;
 502
 503                 if (prefixIs(token, "LaTeX Warning:")) {
 504                         // Here shall we handle different
 505                         // types of warnings
 506                         retval |= LATEX_WARNING;
 507                         lyxerr[Debug::LATEX] << "LaTeX Warning." << endl;
 508                         if (contains(token, "Rerun to get cross-references")) {
 509                                 retval |= RERUN;
 510                                 lyxerr[Debug::LATEX]
 511                                         << "We should rerun." << endl;
 512                         } else if (contains(token, "Citation")
 513                                    && contains(token, "on page")
 514                                    && contains(token, "undefined")) {
 515                                 retval |= UNDEF_CIT;
 516                         }
 517                 } else if (prefixIs(token, "Package")) {
 518                         // Package warnings
 519                         retval |= PACKAGE_WARNING;
 520                         if (contains(token, "natbib Warning:")) {
 521                                 // Natbib warnings
 522                                 if (contains(token, "Citation")
 523                                     && contains(token, "on page")
 524                                     && contains(token, "undefined")) {
 525                                         retval |= UNDEF_CIT;
 526                                 }
 527                         } else if (contains(token, "run BibTeX")) {
 528                                 retval |= UNDEF_CIT;
 529                         } else if (contains(token, "Rerun LaTeX.")) {
 530                                 // at least longtable.sty might use this.
 531                                 retval |= RERUN;
 532                         }
 533                 } else if (prefixIs(token, "! ")) {
 534                         // Ok, we have something that looks like a TeX Error
 535                         // but what do we really have.
 536
 537                         // Just get the error description:
 538                         string desc(token, 2);
 539                         if (contains(token, "LaTeX Error:"))
 540                                 retval |= LATEX_ERROR;
 541                         // get the next line
 542                         string tmp;
 543                         int count = 0;
 544                         do {
 545                                 if (!getline(ifs, tmp))
 546                                         break;
 547                                 if (++count > 10)
 548                                         break;
 549                         } while (!prefixIs(tmp, "l."));
 550                         if (prefixIs(tmp, "l.")) {
 551                                 // we have a latex error
 552                                 retval |=  TEX_ERROR;
 553                                 if (contains(desc, "Package babel Error: You haven't defined the language"))
 554                                         retval |= ERROR_RERUN;
 555                                 // get the line number:
 556                                 int line = 0;
 557                                 sscanf(tmp.c_str(), "l.%d", &line);
 558                                 // get the rest of the message:
 559                                 string errstr(tmp, tmp.find(' '));
 560                                 errstr += '\n';
 561                                 getline(ifs, tmp);
 562                                 while (!contains(errstr, "l.")
 563                                        && !tmp.empty()
 564                                        && !prefixIs(tmp, "! ")
 565                                        && !contains(tmp, "(job aborted")) {
 566                                         errstr += tmp;
 567                                         errstr += "\n";
 568                                         getline(ifs, tmp);
 569                                 }
 570                                 lyxerr[Debug::LATEX]
 571                                         << "line: " << line << '\n'
 572                                         << "Desc: " << desc << '\n'
 573                                         << "Text: " << errstr << endl;
 574                                 if (line == last_line)
 575                                         ++line_count;
 576                                 else {
 577                                         line_count = 1;
 578                                         last_line = line;
 579                                 }
 580                                 if (line_count <= 5) {
 581                                         terr.insertError(line, desc, errstr);
 582                                         ++num_errors;
 583                                 }
 584                         }
 585                 } else {
 586                         // information messages, TeX warnings and other
 587                         // warnings we have not caught earlier.
 588                         if (prefixIs(token, "Overfull ")) {
 589                                 retval |= TEX_WARNING;
 590                         } else if (prefixIs(token, "Underfull ")) {
 591                                 retval |= TEX_WARNING;
 592                         } else if (contains(token, "Rerun to get citations")) {
 593                                 // Natbib seems to use this.
 594                                 retval |= UNDEF_CIT;
 595                         } else if (contains(token, "No pages of output")) {
 596                                 // A dvi file was not created
 597                                 retval |= NO_OUTPUT;
 598                         } else if (contains(token, "That makes 100 errors")) {
 599                                 // More than 100 errors were reprted
 600                                 retval |= TOO_MANY_ERRORS;
 601                         }
 602                 }
 603         }
 604         lyxerr[Debug::LATEX] << "Log line: " << token << endl;
 605         return retval;
 606 }
 607
 608
 609 void LaTeX::deplog(DepTable & head)
 610 {
 611         // This function reads the LaTeX log file end extracts all the external
 612         // files used by the LaTeX run. The files are then entered into the
 613         // dependency file.
 614
 615         string const logfile = OnlyFilename(ChangeExtension(file, ".log"));
 616
 617         LRegex reg1(")* *\\(([^ \\)]+).*");
 618         LRegex reg2("File: ([^ ]+).*");
 619         LRegex reg3("No file ([^ ]+)\\..*");
 620         LRegex reg4("\\\\openout[0-9]+.*=.*`([^ ]+)'\\..*");
 621         LRegex unwanted("^.*\\.(aux|log|dvi|bbl|ind|glo)$");
 622
 623         ifstream ifs(logfile.c_str());
 624         while (ifs) {
 625                 // Ok, the scanning of files here is not sufficient.
 626                 // Sometimes files are named by "File: xxx" only
 627                 // So I think we should use some regexps to find files instead.
 628                 // "(\([^ ]+\)"   should match the "(file " variant
 629                 // "File: \([^ ]+\)" should match the "File: file" variant
 630                 string foundfile;
 631                 string token;
 632                 getline(ifs, token);
 633                 if (token.empty()) continue;
 634
 635                 if (reg1.exact_match(token)) {
 636                         LRegex::SubMatches const & sub = reg1.exec(token);
 637                         foundfile = LSubstring(token, sub[1].first,
 638                                                sub[1].second);
 639                 } else if (reg2.exact_match(token)) {
 640                         LRegex::SubMatches const & sub = reg2.exec(token);
 641                         foundfile = LSubstring(token, sub[1].first,
 642                                                sub[1].second);
 643                 } else if (reg3.exact_match(token)) {
 644                         LRegex::SubMatches const & sub = reg3.exec(token);
 645                         foundfile = LSubstring(token, sub[1].first,
 646                                                sub[1].second);
 647                 } else if (reg4.exact_match(token)) {
 648                         LRegex::SubMatches const & sub = reg4.exec(token);
 649                         foundfile = LSubstring(token, sub[1].first,
 650                                                sub[1].second);
 651                 } else {
 652                         continue;
 653                 }
 654
 655                 lyxerr[Debug::DEPEND] << "Found file: "
 656                                       << foundfile << endl;
 657
 658                 // Ok now we found a file.
 659                 // Now we should make sure that this is a file that we can
 660                 // access through the normal paths.
 661                 // We will not try any fancy search methods to
 662                 // find the file.
 663
 664                 // (1) foundfile is an
 665                 //     absolute path and should
 666                 //     be inserted.
 667                 if (AbsolutePath(foundfile)) {
 668                         lyxerr[Debug::DEPEND] << "AbsolutePath file: "
 669                                               << foundfile << endl;
 670                         // On initial insert we want to do the update at once
 671                         // since this file can not be a file generated by
 672                         // the latex run.
 673                         if (FileInfo(foundfile).exist())
 674                                 head.insert(foundfile, true);
 675                 }
 676
 677                 // (2) foundfile is in the tmpdir
 678                 //     insert it into head
 679                 else if (FileInfo(OnlyFilename(foundfile)).exist()) {
 680                         if (unwanted.exact_match(foundfile)) {
 681                                 lyxerr[Debug::DEPEND]
 682                                         << "We don't want "
 683                                         << OnlyFilename(foundfile)
 684                                         << " in the dep file"
 685                                         << endl;
 686                         } else if (suffixIs(foundfile, ".tex")) {
 687                                 // This is a tex file generated by LyX
 688                                 // and latex is not likely to change this
 689                                 // during its runs.
 690                                 lyxerr[Debug::DEPEND]
 691                                         << "Tmpdir TeX file: "
 692                                         << OnlyFilename(foundfile)
 693                                         << endl;
 694                                 head.insert(foundfile, true);
 695                         } else {
 696                                 lyxerr[Debug::DEPEND]
 697                                         << "In tmpdir file:"
 698                                         << OnlyFilename(foundfile)
 699                                         << endl;
 700                                 head.insert(OnlyFilename(foundfile));
 701                         }
 702                 } else
 703                         lyxerr[Debug::DEPEND]
 704                                 << "Not a file or we are unable to find it."
 705                                 << endl;
 706         }
 707 }