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 #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         if (lfun) {
 178                 ostringstream str;
 179                 str << _("LaTeX run number") << ' ' << count;
 180                 lfun->Dispatch(LFUN_MESSAGE, str.str().c_str());
 181         }
 182
 183
 184         //WriteStatus(lfun, string(_("LaTeX run number ")) + tostr(count));
 185         this->operator()();
 186         scanres = scanLogFile(terr);
 187         if (scanres & ERROR_RERUN) {
 188                 lyxerr[Debug::LATEX] << "Rerunning LaTeX" << endl;
 189                 this->operator()();
 190                 scanres = scanLogFile(terr);
 191         }
 192
 193         if (scanres & ERRORS) {
 194                 deleteFilesOnError();
 195                 return scanres; // return on error
 196         }
 197
 198         vector<Aux_Info> const bibtex_info = scanAuxFiles(aux_file);
 199         if (!run_bibtex && bibtex_info_old != bibtex_info)
 200                 run_bibtex = true;
 201
 202         // update the dependencies.
 203         deplog(head); // reads the latex log
 204         head.update();
 205
 206         // 0.5
 207         // At this point we must run external programs if needed.
 208         // makeindex will be run if a .idx file changed or was generated.
 209         // And if there were undefined citations or changes in references
 210         // the .aux file is checked for signs of bibtex. Bibtex is then run
 211         // if needed.
 212
 213         // run makeindex
 214         if (head.haschanged(OnlyFilename(ChangeExtension(file, ".idx")))) {
 215                 // no checks for now
 216                 lyxerr[Debug::LATEX] << "Running MakeIndex." << endl;
 217                 if (lfun) lfun->Dispatch(LFUN_MESSAGE, _("Running MakeIndex."));
 218 //              WriteStatus(minib, _("Running MakeIndex."));
 219                 rerun = runMakeIndex(OnlyFilename(ChangeExtension(file, ".idx")));
 220         }
 221
 222         // run bibtex
 223         // if (scanres & UNDEF_CIT || scanres & RERUN || run_bibtex)
 224         if (scanres & UNDEF_CIT || run_bibtex) {
 225                 // Here we must scan the .aux file and look for
 226                 // "\bibdata" and/or "\bibstyle". If one of those
 227                 // tags is found -> run bibtex and set rerun = true;
 228                 // no checks for now
 229                 lyxerr[Debug::LATEX] << "Running BibTeX." << endl;
 230                 if (lfun) lfun->Dispatch(LFUN_MESSAGE, _("Running BibTeX."));
 231                 //WriteStatus(minib, _("Running BibTeX."));
 232                 updateBibtexDependencies(head, bibtex_info);
 233                 rerun |= runBibTeX(bibtex_info);
 234         } else if (!had_depfile)
 235                 /// If we run pdflatex on the file after running latex on it,
 236                 /// then we do not need to run bibtex, but we do need to
 237                 /// insert the .bib and .bst files into the .dep-pdf file.
 238                 updateBibtexDependencies(head, bibtex_info);
 239
 240         // 1
 241         // we know on this point that latex has been run once (or we just
 242         // returned) and the question now is to decide if we need to run
 243         // it any more. This is done by asking if any of the files in the
 244         // dependency file has changed. (remember that the checksum for
 245         // a given file is reported to have changed if it just was created)
 246         //     -> if changed or rerun == true:
 247         //             run latex once more and
 248         //             update the dependency structure
 249         //     -> if not changed:
 250         //             we does nothing at this point
 251         //
 252         if (rerun || head.sumchange()) {
 253                 rerun = false;
 254                 ++count;
 255                 lyxerr[Debug::DEPEND]
 256                         << "Dep. file has changed or rerun requested" << endl;
 257                 lyxerr[Debug::LATEX]
 258                         << "Run #" << count << endl;
 259                 if (lfun) {
 260                         ostringstream str;
 261                         str << _("LaTeX run number") << ' ' << count;
 262                         lfun->Dispatch(LFUN_MESSAGE, str.str().c_str());
 263                 }
 264
 265 //              WriteStatus(minib,
 266 //                          string(_("LaTeX run number ")) + tostr(count));
 267                 this->operator()();
 268                 scanres = scanLogFile(terr);
 269                 if (scanres & ERRORS) {
 270                         deleteFilesOnError();
 271                         return scanres; // return on error
 272                 }
 273
 274                 // update the depedencies
 275                 deplog(head); // reads the latex log
 276                 head.update();
 277         } else {
 278                 lyxerr[Debug::DEPEND] << "Dep. file has NOT changed" << endl;
 279         }
 280
 281         // 1.5
 282         // The inclusion of files generated by external programs like
 283         // makeindex or bibtex might have done changes to pagenumbereing,
 284         // etc. And because of this we must run the external programs
 285         // again to make sure everything is redone correctly.
 286         // Also there should be no need to run the external programs any
 287         // more after this.
 288
 289         // run makeindex if the <file>.idx has changed or was generated.
 290         if (head.haschanged(OnlyFilename(ChangeExtension(file, ".idx")))) {
 291                 // no checks for now
 292                 lyxerr[Debug::LATEX] << "Running MakeIndex." << endl;
 293                 if (lfun) lfun->Dispatch(LFUN_MESSAGE, _("Running MakeIndex."));
 294                 //WriteStatus(minib, _("Running MakeIndex."));
 295                 rerun = runMakeIndex(OnlyFilename(ChangeExtension(file, ".idx")));
 296         }
 297
 298         // 2
 299         // we will only run latex more if the log file asks for it.
 300         // or if the sumchange() is true.
 301         //     -> rerun asked for:
 302         //             run latex and
 303         //             remake the dependency file
 304         //             goto 2 or return if max runs are reached.
 305         //     -> rerun not asked for:
 306         //             just return (fall out of bottom of func)
 307         //
 308         while ((head.sumchange() || rerun || (scanres & RERUN))
 309                && count < MAX_RUN) {
 310                 // Yes rerun until message goes away, or until
 311                 // MAX_RUNS are reached.
 312                 rerun = false;
 313                 ++count;
 314                 lyxerr[Debug::LATEX] << "Run #" << count << endl;
 315                 if (lfun) {
 316                         ostringstream str;
 317                         str << _("LaTeX run number") << ' ' << count;
 318                         lfun->Dispatch(LFUN_MESSAGE, str.str().c_str());
 319                 }
 320
 321 //              WriteStatus(minib, string(_("LaTeX run number ")) + tostr(count));
 322                 this->operator()();
 323                 scanres = scanLogFile(terr);
 324                 if (scanres & ERRORS) {
 325                         deleteFilesOnError();
 326                         return scanres; // return on error
 327                 }
 328
 329                 // keep this updated
 330                 head.update();
 331         }
 332
 333         // Write the dependencies to file.
 334         head.write(depfile);
 335         lyxerr[Debug::LATEX] << "Done." << endl;
 336         return scanres;
 337 }
 338
 339
 340 int LaTeX::operator()()
 341 {
 342 #ifndef __EMX__
 343         string tmp = cmd + ' ' + QuoteName(file) + " > /dev/null";
 344 #else // cmd.exe (OS/2) causes SYS0003 error at "/dev/null"
 345         string tmp = cmd + ' ' + file + " > nul";
 346 #endif
 347         Systemcalls one;
 348         return one.startscript(Systemcalls::System, tmp);
 349 }
 350
 351
 352 bool LaTeX::runMakeIndex(string const & f)
 353 {
 354         lyxerr[Debug::LATEX] << "idx file has been made,"
 355                 " running makeindex on file "
 356                              <<  f << endl;
 357
 358         // It should be possible to set the switches for makeindex
 359         // sorting style and such. It would also be very convenient
 360         // to be able to make style files from within LyX. This has
 361         // to come for a later time. (0.13 perhaps?)
 362         string tmp = "makeindex -c -q ";
 363         tmp += f;
 364         Systemcalls one;
 365         one.startscript(Systemcalls::System, tmp);
 366         return true;
 367 }
 368
 369
 370 vector<Aux_Info> const
 371 LaTeX::scanAuxFiles(string const & file)
 372 {
 373         vector<Aux_Info> result;
 374
 375         result.push_back(scanAuxFile(file));
 376
 377         for (int i = 1; i < 1000; ++i) {
 378                 string file2 = ChangeExtension(file, "") + "." + tostr(i)
 379                         + ".aux";
 380                 FileInfo fi(file2);
 381                 if (!fi.exist())
 382                         break;
 383                 result.push_back(scanAuxFile(file2));
 384         }
 385         return result;
 386 }
 387
 388
 389 Aux_Info const LaTeX::scanAuxFile(string const & file)
 390 {
 391         Aux_Info result;
 392         result.aux_file = file;
 393         scanAuxFile(file, result);
 394         return result;
 395 }
 396
 397
 398 void LaTeX::scanAuxFile(string const & file, Aux_Info & aux_info)
 399 {
 400         lyxerr[Debug::LATEX] << "Scanning aux file: " << file << endl;
 401
 402         ifstream ifs(file.c_str());
 403         string token;
 404         LRegex reg1("\\\\citation\\{([^}]+)\\}");
 405         LRegex reg2("\\\\bibdata\\{([^}]+)\\}");
 406         LRegex reg3("\\\\bibstyle\\{([^}]+)\\}");
 407         LRegex reg4("\\\\@input\\{([^}]+)\\}");
 408
 409         while (getline(ifs, token)) {
 410                 if (reg1.exact_match(token)) {
 411                         LRegex::SubMatches const & sub = reg1.exec(token);
 412                         string data = LSubstring(token, sub[1].first,
 413                                                  sub[1].second);
 414                         while (!data.empty()) {
 415                                 string citation;
 416                                 data = split(data, citation, ',');
 417                                 lyxerr[Debug::LATEX] << "Citation: "
 418                                                      << citation << endl;
 419                                 aux_info.citations.insert(citation);
 420                         }
 421                 } else if (reg2.exact_match(token)) {
 422                         LRegex::SubMatches const & sub = reg2.exec(token);
 423                         string data = LSubstring(token, sub[1].first,
 424                                                  sub[1].second);
 425                         // data is now all the bib files separated by ','
 426                         // get them one by one and pass them to the helper
 427                         while (!data.empty()) {
 428                                 string database;
 429                                 data = split(data, database, ',');
 430                                 database = ChangeExtension(database, "bib");
 431                                 lyxerr[Debug::LATEX] << "Bibtex database: `"
 432                                                      << database << "'" << endl;
 433                                 aux_info.databases.insert(database);
 434                         }
 435                 } else if (reg3.exact_match(token)) {
 436                         LRegex::SubMatches const & sub = reg3.exec(token);
 437                         string style = LSubstring(token, sub[1].first,
 438                                                   sub[1].second);
 439                         // token is now the style file
 440                         // pass it to the helper
 441                         style = ChangeExtension(style, "bst");
 442                         lyxerr[Debug::LATEX] << "Bibtex style: `"
 443                                              << style << "'" << endl;
 444                         aux_info.styles.insert(style);
 445                 } else if (reg4.exact_match(token)) {
 446                         LRegex::SubMatches const & sub = reg4.exec(token);
 447                         string file2 = LSubstring(token, sub[1].first,
 448                                                   sub[1].second);
 449                         scanAuxFile(file2, aux_info);
 450                 }
 451         }
 452 }
 453
 454
 455 void LaTeX::updateBibtexDependencies(DepTable & dep,
 456                                      vector<Aux_Info> const & bibtex_info)
 457 {
 458         // Since a run of Bibtex mandates more latex runs it is ok to
 459         // remove all ".bib" and ".bst" files.
 460         dep.remove_files_with_extension(".bib");
 461         dep.remove_files_with_extension(".bst");
 462         string aux = OnlyFilename(ChangeExtension(file, ".aux"));
 463
 464         for (vector<Aux_Info>::const_iterator it = bibtex_info.begin();
 465              it != bibtex_info.end(); ++it) {
 466                 for (set<string>::const_iterator it2 = it->databases.begin();
 467                      it2 != it->databases.end(); ++it2) {
 468                         string file = findtexfile(*it2, "bib");
 469                         if (!file.empty())
 470                                 dep.insert(file, true);
 471                 }
 472
 473                 for (set<string>::const_iterator it2 = it->styles.begin();
 474                      it2 != it->styles.end(); ++it2) {
 475                         string file = findtexfile(*it2, "bst");
 476                         if (!file.empty())
 477                                 dep.insert(file, true);
 478                 }
 479         }
 480 }
 481
 482
 483 bool LaTeX::runBibTeX(vector<Aux_Info> const & bibtex_info)
 484 {
 485         bool result = false;
 486         for (vector<Aux_Info>::const_iterator it = bibtex_info.begin();
 487              it != bibtex_info.end(); ++it) {
 488                 if (it->databases.empty())
 489                         continue;
 490                 result = true;
 491
 492                 string tmp = "bibtex ";
 493                 tmp += OnlyFilename(ChangeExtension(it->aux_file, string()));
 494                 Systemcalls one;
 495                 one.startscript(Systemcalls::System, tmp);
 496         }
 497         // Return whether bibtex was run
 498         return result;
 499 }
 500
 501
 502 int LaTeX::scanLogFile(TeXErrors & terr)
 503 {
 504         int last_line = -1;
 505         int line_count = 1;
 506         int retval = NO_ERRORS;
 507         string tmp = OnlyFilename(ChangeExtension(file, ".log"));
 508         lyxerr[Debug::LATEX] << "Log file: " << tmp << endl;
 509         ifstream ifs(tmp.c_str());
 510
 511         string token;
 512         while (getline(ifs, token)) {
 513                 lyxerr[Debug::LATEX] << "Log line: " << token << endl;
 514
 515                 if (token.empty())
 516                         continue;
 517
 518                 if (prefixIs(token, "LaTeX Warning:")) {
 519                         // Here shall we handle different
 520                         // types of warnings
 521                         retval |= LATEX_WARNING;
 522                         lyxerr[Debug::LATEX] << "LaTeX Warning." << endl;
 523                         if (contains(token, "Rerun to get cross-references")) {
 524                                 retval |= RERUN;
 525                                 lyxerr[Debug::LATEX]
 526                                         << "We should rerun." << endl;
 527                         } else if (contains(token, "Citation")
 528                                    && contains(token, "on page")
 529                                    && contains(token, "undefined")) {
 530                                 retval |= UNDEF_CIT;
 531                         }
 532                 } else if (prefixIs(token, "Package")) {
 533                         // Package warnings
 534                         retval |= PACKAGE_WARNING;
 535                         if (contains(token, "natbib Warning:")) {
 536                                 // Natbib warnings
 537                                 if (contains(token, "Citation")
 538                                     && contains(token, "on page")
 539                                     && contains(token, "undefined")) {
 540                                         retval |= UNDEF_CIT;
 541                                 }
 542                         } else if (contains(token, "run BibTeX")) {
 543                                 retval |= UNDEF_CIT;
 544                         } else if (contains(token, "Rerun LaTeX.")) {
 545                                 // at least longtable.sty might use this.
 546                                 retval |= RERUN;
 547                         }
 548                 } else if (prefixIs(token, "! ")) {
 549                         // Ok, we have something that looks like a TeX Error
 550                         // but what do we really have.
 551
 552                         // Just get the error description:
 553                         string desc(token, 2);
 554                         if (contains(token, "LaTeX Error:"))
 555                                 retval |= LATEX_ERROR;
 556                         // get the next line
 557                         string tmp;
 558                         int count = 0;
 559                         do {
 560                                 if (!getline(ifs, tmp))
 561                                         break;
 562                                 if (++count > 10)
 563                                         break;
 564                         } while (!prefixIs(tmp, "l."));
 565                         if (prefixIs(tmp, "l.")) {
 566                                 // we have a latex error
 567                                 retval |=  TEX_ERROR;
 568                                 if (contains(desc, "Package babel Error: You haven't defined the language"))
 569                                         retval |= ERROR_RERUN;
 570                                 // get the line number:
 571                                 int line = 0;
 572                                 sscanf(tmp.c_str(), "l.%d", &line);
 573                                 // get the rest of the message:
 574                                 string errstr(tmp, tmp.find(' '));
 575                                 errstr += '\n';
 576                                 getline(ifs, tmp);
 577                                 while (!contains(errstr, "l.")
 578                                        && !tmp.empty()
 579                                        && !prefixIs(tmp, "! ")
 580                                        && !contains(tmp, "(job aborted")) {
 581                                         errstr += tmp;
 582                                         errstr += "\n";
 583                                         getline(ifs, tmp);
 584                                 }
 585                                 lyxerr[Debug::LATEX]
 586                                         << "line: " << line << '\n'
 587                                         << "Desc: " << desc << '\n'
 588                                         << "Text: " << errstr << endl;
 589                                 if (line == last_line)
 590                                         ++line_count;
 591                                 else {
 592                                         line_count = 1;
 593                                         last_line = line;
 594                                 }
 595                                 if (line_count <= 5) {
 596                                         terr.insertError(line, desc, errstr);
 597                                         ++num_errors;
 598                                 }
 599                         }
 600                 } else {
 601                         // information messages, TeX warnings and other
 602                         // warnings we have not caught earlier.
 603                         if (prefixIs(token, "Overfull ")) {
 604                                 retval |= TEX_WARNING;
 605                         } else if (prefixIs(token, "Underfull ")) {
 606                                 retval |= TEX_WARNING;
 607                         } else if (contains(token, "Rerun to get citations")) {
 608                                 // Natbib seems to use this.
 609                                 retval |= UNDEF_CIT;
 610                         } else if (contains(token, "No pages of output")) {
 611                                 // A dvi file was not created
 612                                 retval |= NO_OUTPUT;
 613                         } else if (contains(token, "That makes 100 errors")) {
 614                                 // More than 100 errors were reprted
 615                                 retval |= TOO_MANY_ERRORS;
 616                         }
 617                 }
 618         }
 619         lyxerr[Debug::LATEX] << "Log line: " << token << endl;
 620         return retval;
 621 }
 622
 623
 624 void LaTeX::deplog(DepTable & head)
 625 {
 626         // This function reads the LaTeX log file end extracts all the external
 627         // files used by the LaTeX run. The files are then entered into the
 628         // dependency file.
 629
 630         string const logfile = OnlyFilename(ChangeExtension(file, ".log"));
 631
 632         LRegex reg1("\\)* *\\(([^ )]+).*");
 633         LRegex reg2("File: ([^ ]+).*");
 634         LRegex reg3("No file ([^ ]+)\\..*");
 635         LRegex reg4("\\\\openout[0-9]+.*=.*`([^ ]+)'\\..*");
 636         LRegex unwanted("^.*\\.(aux|log|dvi|bbl|ind|glo)$");
 637
 638         ifstream ifs(logfile.c_str());
 639         while (ifs) {
 640                 // Ok, the scanning of files here is not sufficient.
 641                 // Sometimes files are named by "File: xxx" only
 642                 // So I think we should use some regexps to find files instead.
 643                 // "(\([^ ]+\)"   should match the "(file " variant
 644                 // "File: \([^ ]+\)" should match the "File: file" variant
 645                 string foundfile;
 646                 string token;
 647                 getline(ifs, token);
 648                 if (token.empty()) continue;
 649
 650                 if (reg1.exact_match(token)) {
 651                         LRegex::SubMatches const & sub = reg1.exec(token);
 652                         foundfile = LSubstring(token, sub[1].first,
 653                                                sub[1].second);
 654                 } else if (reg2.exact_match(token)) {
 655                         LRegex::SubMatches const & sub = reg2.exec(token);
 656                         foundfile = LSubstring(token, sub[1].first,
 657                                                sub[1].second);
 658                 } else if (reg3.exact_match(token)) {
 659                         LRegex::SubMatches const & sub = reg3.exec(token);
 660                         foundfile = LSubstring(token, sub[1].first,
 661                                                sub[1].second);
 662                 } else if (reg4.exact_match(token)) {
 663                         LRegex::SubMatches const & sub = reg4.exec(token);
 664                         foundfile = LSubstring(token, sub[1].first,
 665                                                sub[1].second);
 666                 } else {
 667                         continue;
 668                 }
 669
 670                 lyxerr[Debug::DEPEND] << "Found file: "
 671                                       << foundfile << endl;
 672
 673                 // Ok now we found a file.
 674                 // Now we should make sure that this is a file that we can
 675                 // access through the normal paths.
 676                 // We will not try any fancy search methods to
 677                 // find the file.
 678
 679                 // (1) foundfile is an
 680                 //     absolute path and should
 681                 //     be inserted.
 682                 if (AbsolutePath(foundfile)) {
 683                         lyxerr[Debug::DEPEND] << "AbsolutePath file: "
 684                                               << foundfile << endl;
 685                         // On initial insert we want to do the update at once
 686                         // since this file can not be a file generated by
 687                         // the latex run.
 688                         if (FileInfo(foundfile).exist())
 689                                 head.insert(foundfile, true);
 690                 }
 691
 692                 // (2) foundfile is in the tmpdir
 693                 //     insert it into head
 694                 else if (FileInfo(OnlyFilename(foundfile)).exist()) {
 695                         if (unwanted.exact_match(foundfile)) {
 696                                 lyxerr[Debug::DEPEND]
 697                                         << "We don't want "
 698                                         << OnlyFilename(foundfile)
 699                                         << " in the dep file"
 700                                         << endl;
 701                         } else if (suffixIs(foundfile, ".tex")) {
 702                                 // This is a tex file generated by LyX
 703                                 // and latex is not likely to change this
 704                                 // during its runs.
 705                                 lyxerr[Debug::DEPEND]
 706                                         << "Tmpdir TeX file: "
 707                                         << OnlyFilename(foundfile)
 708                                         << endl;
 709                                 head.insert(foundfile, true);
 710                         } else {
 711                                 lyxerr[Debug::DEPEND]
 712                                         << "In tmpdir file:"
 713                                         << OnlyFilename(foundfile)
 714                                         << endl;
 715                                 head.insert(OnlyFilename(foundfile));
 716                         }
 717                 } else
 718                         lyxerr[Debug::DEPEND]
 719                                 << "Not a file or we are unable to find it."
 720                                 << endl;
 721         }
 722
 723         // Make sure that the main .tex file is in the dependancy file.
 724         head.insert(OnlyFilename(file), true);
 725 }