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 "support/lstrings.h"
  32 #include "bufferlist.h"
  33 #include "gettext.h"
  34 #include "lyx_gui_misc.h"
  35 #include "lyxfunc.h"
  36
  37 using std::ifstream;
  38 using std::getline;
  39 using std::endl;
  40 using std::vector;
  41 using std::set;
  42
  43 // TODO: in no particular order
  44 // - get rid of the extern BufferList and the call to
  45 //   BufferList::updateIncludedTeXfiles, this should either
  46 //   be done before calling LaTeX::funcs or in a completely
  47 //   different way.
  48 // - the bibtex command options should be supported.
  49 // - the makeindex style files should be taken care of with
  50 //   the dependency mechanism.
  51 // - makeindex commandline options should be supported
  52 // - somewhere support viewing of bibtex and makeindex log files.
  53 // - we should perhaps also scan the bibtex log file
  54 // - we should perhaps also scan the bibtex log file
  55
  56 extern BufferList bufferlist;
  57
  58 /*
  59  * CLASS TEXERRORS
  60  */
  61
  62 void TeXErrors::insertError(int line, string const & error_desc,
  63                             string const & error_text)
  64 {
  65         Error newerr(line, error_desc, error_text);
  66         errors.push_back(newerr);
  67 }
  68
  69 /*
  70  * CLASS LaTeX
  71  */
  72
  73 LaTeX::LaTeX(string const & latex, string const & f, string const & p)
  74                 : cmd(latex), file(f), path(p)
  75 {
  76         num_errors = 0;
  77         depfile = file + ".dep";
  78         if (prefixIs(cmd, "pdf")) // Do we use pdflatex ?
  79                 depfile += "-pdf";
  80 }
  81
  82
  83 void LaTeX::deleteFilesOnError() const
  84 {
  85         // currently just a dummy function.
  86
  87         // What files do we have to delete?
  88
  89         // This will at least make latex do all the runs
  90         lyx::unlink(depfile);
  91
  92         // but the reason for the error might be in a generated file...
  93
  94         string ofname = OnlyFilename(file);
  95
  96         // bibtex file
  97         string bbl = ChangeExtension(ofname, ".bbl");
  98         lyx::unlink(bbl);
  99
 100         // makeindex file
 101         string ind = ChangeExtension(ofname, ".ind");
 102         lyx::unlink(ind);
 103
 104         // Also remove the aux file
 105         string aux = ChangeExtension(ofname, ".aux");
 106         lyx::unlink(aux);
 107 }
 108
 109
 110 int LaTeX::run(TeXErrors & terr, LyXFunc * lfun)
 111         // We know that this function will only be run if the lyx buffer
 112         // has been changed. We also know that a newly written .tex file
 113         // is always different from the previous one because of the date
 114         // in it. However it seems safe to run latex (at least) on time each
 115         // time the .tex file changes.
 116 {
 117         int scanres = NO_ERRORS;
 118         unsigned int count = 0; // number of times run
 119         num_errors = 0; // just to make sure.
 120         const unsigned int MAX_RUN = 6;
 121         DepTable head; // empty head
 122         bool rerun = false; // rerun requested
 123
 124         // The class LaTeX does not know the temp path.
 125         bufferlist.updateIncludedTeXfiles(lyx::getcwd()); //GetCWD());
 126
 127         // Never write the depfile if an error was encountered.
 128
 129         // 0
 130         // first check if the file dependencies exist:
 131         //     ->If it does exist
 132         //             check if any of the files mentioned in it have
 133         //             changed (done using a checksum).
 134         //                 -> if changed:
 135         //                        run latex once and
 136         //                        remake the dependency file
 137         //                 -> if not changed:
 138         //                        just return there is nothing to do for us.
 139         //     ->if it doesn't exist
 140         //             make it and
 141         //             run latex once (we need to run latex once anyway) and
 142         //             remake the dependency file.
 143         //
 144
 145         FileInfo fi(depfile);
 146         bool had_depfile = fi.exist();
 147         bool run_bibtex = false;
 148         string aux_file = OnlyFilename(ChangeExtension(file, "aux"));
 149
 150         if (had_depfile) {
 151                 lyxerr[Debug::DEPEND] << "Dependency file exists" << endl;
 152                 // Read the dep file:
 153                 head.read(depfile);
 154                 // Update the checksums
 155                 head.update();
 156                 if (!head.sumchange()) {
 157                         lyxerr[Debug::DEPEND] << "return no_change" << endl;
 158                         return NO_CHANGE;
 159                 }
 160                 lyxerr[Debug::DEPEND]
 161                         << "Dependency file has changed" << endl;
 162
 163                 if (head.extchanged(".bib") || head.extchanged(".bst"))
 164                         run_bibtex = true;
 165         } else
 166                 lyxerr[Debug::DEPEND]
 167                         << "Dependency file does not exist" << endl;
 168
 169         /// We scan the aux file even when had_depfile = false,
 170         /// because we can run pdflatex on the file after running latex on it,
 171         /// in which case we will not need to run bibtex again.
 172         vector<Aux_Info> bibtex_info_old;
 173         if (!run_bibtex)
 174                 bibtex_info_old = scanAuxFiles(aux_file);
 175
 176         ++count;
 177         lyxerr[Debug::LATEX] << "Run #" << count << endl;
 178         if (lfun) {
 179                 ostringstream str;
 180                 str << _("LaTeX run number") << ' ' << count;
 181                 lfun->dispatch(LFUN_MESSAGE, str.str().c_str());
 182         }
 183
 184         this->operator()();
 185         scanres = scanLogFile(terr);
 186         if (scanres & ERROR_RERUN) {
 187                 lyxerr[Debug::LATEX] << "Rerunning LaTeX" << endl;
 188                 this->operator()();
 189                 scanres = scanLogFile(terr);
 190         }
 191
 192         if (scanres & ERRORS) {
 193                 deleteFilesOnError();
 194                 return scanres; // return on error
 195         }
 196
 197         vector<Aux_Info> const bibtex_info = scanAuxFiles(aux_file);
 198         if (!run_bibtex && bibtex_info_old != bibtex_info)
 199                 run_bibtex = true;
 200
 201         // update the dependencies.
 202         deplog(head); // reads the latex log
 203         head.update();
 204
 205         // 0.5
 206         // At this point we must run external programs if needed.
 207         // makeindex will be run if a .idx file changed or was generated.
 208         // And if there were undefined citations or changes in references
 209         // the .aux file is checked for signs of bibtex. Bibtex is then run
 210         // if needed.
 211
 212         // run makeindex
 213         if (head.haschanged(OnlyFilename(ChangeExtension(file, ".idx")))) {
 214                 // no checks for now
 215                 lyxerr[Debug::LATEX] << "Running MakeIndex." << endl;
 216                 if (lfun) {
 217                         lfun->dispatch(LFUN_MESSAGE, _("Running MakeIndex."));
 218                 }
 219
 220                 rerun = runMakeIndex(OnlyFilename(ChangeExtension(file, ".idx")));
 221         }
 222
 223         // run bibtex
 224         // if (scanres & UNDEF_CIT || scanres & RERUN || run_bibtex)
 225         if (scanres & UNDEF_CIT || run_bibtex) {
 226                 // Here we must scan the .aux file and look for
 227                 // "\bibdata" and/or "\bibstyle". If one of those
 228                 // tags is found -> run bibtex and set rerun = true;
 229                 // no checks for now
 230                 lyxerr[Debug::LATEX] << "Running BibTeX." << endl;
 231                 if (lfun) {
 232                         lfun->dispatch(LFUN_MESSAGE, _("Running BibTeX."));
 233                 }
 234
 235                 updateBibtexDependencies(head, bibtex_info);
 236                 rerun |= runBibTeX(bibtex_info);
 237         } else if (!had_depfile) {
 238                 /// If we run pdflatex on the file after running latex on it,
 239                 /// then we do not need to run bibtex, but we do need to
 240                 /// insert the .bib and .bst files into the .dep-pdf file.
 241                 updateBibtexDependencies(head, bibtex_info);
 242         }
 243
 244         // 1
 245         // we know on this point that latex has been run once (or we just
 246         // returned) and the question now is to decide if we need to run
 247         // it any more. This is done by asking if any of the files in the
 248         // dependency file has changed. (remember that the checksum for
 249         // a given file is reported to have changed if it just was created)
 250         //     -> if changed or rerun == true:
 251         //             run latex once more and
 252         //             update the dependency structure
 253         //     -> if not changed:
 254         //             we does nothing at this point
 255         //
 256         if (rerun || head.sumchange()) {
 257                 rerun = false;
 258                 ++count;
 259                 lyxerr[Debug::DEPEND]
 260                         << "Dep. file has changed or rerun requested" << endl;
 261                 lyxerr[Debug::LATEX]
 262                         << "Run #" << count << endl;
 263                 if (lfun) {
 264                         ostringstream str;
 265                         str << _("LaTeX run number") << ' ' << count;
 266                         lfun->dispatch(LFUN_MESSAGE, str.str().c_str());
 267                 }
 268
 269                 this->operator()();
 270                 scanres = scanLogFile(terr);
 271                 if (scanres & ERRORS) {
 272                         deleteFilesOnError();
 273                         return scanres; // return on error
 274                 }
 275
 276                 // update the depedencies
 277                 deplog(head); // reads the latex log
 278                 head.update();
 279         } else {
 280                 lyxerr[Debug::DEPEND] << "Dep. file has NOT changed" << endl;
 281         }
 282
 283         // 1.5
 284         // The inclusion of files generated by external programs like
 285         // makeindex or bibtex might have done changes to pagenumbereing,
 286         // etc. And because of this we must run the external programs
 287         // again to make sure everything is redone correctly.
 288         // Also there should be no need to run the external programs any
 289         // more after this.
 290
 291         // run makeindex if the <file>.idx has changed or was generated.
 292         if (head.haschanged(OnlyFilename(ChangeExtension(file, ".idx")))) {
 293                 // no checks for now
 294                 lyxerr[Debug::LATEX] << "Running MakeIndex." << endl;
 295                 if (lfun) {
 296                         lfun->dispatch(LFUN_MESSAGE, _("Running MakeIndex."));
 297                 }
 298
 299                 rerun = runMakeIndex(OnlyFilename(ChangeExtension(file, ".idx")));
 300         }
 301
 302         // 2
 303         // we will only run latex more if the log file asks for it.
 304         // or if the sumchange() is true.
 305         //     -> rerun asked for:
 306         //             run latex and
 307         //             remake the dependency file
 308         //             goto 2 or return if max runs are reached.
 309         //     -> rerun not asked for:
 310         //             just return (fall out of bottom of func)
 311         //
 312         while ((head.sumchange() || rerun || (scanres & RERUN))
 313                && count < MAX_RUN) {
 314                 // Yes rerun until message goes away, or until
 315                 // MAX_RUNS are reached.
 316                 rerun = false;
 317                 ++count;
 318                 lyxerr[Debug::LATEX] << "Run #" << count << endl;
 319                 if (lfun) {
 320                         ostringstream str;
 321                         str << _("LaTeX run number") << ' ' << count;
 322                         lfun->dispatch(LFUN_MESSAGE, str.str().c_str());
 323                 }
 324
 325                 this->operator()();
 326                 scanres = scanLogFile(terr);
 327                 if (scanres & ERRORS) {
 328                         deleteFilesOnError();
 329                         return scanres; // return on error
 330                 }
 331
 332                 // keep this updated
 333                 head.update();
 334         }
 335
 336         // Write the dependencies to file.
 337         head.write(depfile);
 338         lyxerr[Debug::LATEX] << "Done." << endl;
 339         return scanres;
 340 }
 341
 342
 343 int LaTeX::operator()()
 344 {
 345 #ifndef __EMX__
 346         string tmp = cmd + ' ' + QuoteName(file) + " > /dev/null";
 347 #else // cmd.exe (OS/2) causes SYS0003 error at "/dev/null"
 348         string tmp = cmd + ' ' + file + " > nul";
 349 #endif
 350         Systemcalls one;
 351         return one.startscript(Systemcalls::System, tmp);
 352 }
 353
 354
 355 bool LaTeX::runMakeIndex(string const & f)
 356 {
 357         lyxerr[Debug::LATEX] << "idx file has been made,"
 358                 " running makeindex on file "
 359                              <<  f << endl;
 360
 361         // It should be possible to set the switches for makeindex
 362         // sorting style and such. It would also be very convenient
 363         // to be able to make style files from within LyX. This has
 364         // to come for a later time. (0.13 perhaps?)
 365         string tmp = "makeindex -c -q ";
 366         tmp += f;
 367         Systemcalls one;
 368         one.startscript(Systemcalls::System, tmp);
 369         return true;
 370 }
 371
 372
 373 vector<Aux_Info> const
 374 LaTeX::scanAuxFiles(string const & file)
 375 {
 376         vector<Aux_Info> result;
 377
 378         result.push_back(scanAuxFile(file));
 379
 380         for (int i = 1; i < 1000; ++i) {
 381                 string file2 = ChangeExtension(file, "") + "." + tostr(i)
 382                         + ".aux";
 383                 FileInfo fi(file2);
 384                 if (!fi.exist())
 385                         break;
 386                 result.push_back(scanAuxFile(file2));
 387         }
 388         return result;
 389 }
 390
 391
 392 Aux_Info const LaTeX::scanAuxFile(string const & file)
 393 {
 394         Aux_Info result;
 395         result.aux_file = file;
 396         scanAuxFile(file, result);
 397         return result;
 398 }
 399
 400
 401 void LaTeX::scanAuxFile(string const & file, Aux_Info & aux_info)
 402 {
 403         lyxerr[Debug::LATEX] << "Scanning aux file: " << file << endl;
 404
 405         ifstream ifs(file.c_str());
 406         string token;
 407         LRegex reg1("\\\\citation\\{([^}]+)\\}");
 408         LRegex reg2("\\\\bibdata\\{([^}]+)\\}");
 409         LRegex reg3("\\\\bibstyle\\{([^}]+)\\}");
 410         LRegex reg4("\\\\@input\\{([^}]+)\\}");
 411
 412         while (getline(ifs, token)) {
 413                 token = strip(token, '\r');
 414                 if (reg1.exact_match(token)) {
 415                         LRegex::SubMatches const & sub = reg1.exec(token);
 416                         string data = LSubstring(token, sub[1].first,
 417                                                  sub[1].second);
 418                         while (!data.empty()) {
 419                                 string citation;
 420                                 data = split(data, citation, ',');
 421                                 lyxerr[Debug::LATEX] << "Citation: "
 422                                                      << citation << endl;
 423                                 aux_info.citations.insert(citation);
 424                         }
 425                 } else if (reg2.exact_match(token)) {
 426                         LRegex::SubMatches const & sub = reg2.exec(token);
 427                         string data = LSubstring(token, sub[1].first,
 428                                                  sub[1].second);
 429                         // data is now all the bib files separated by ','
 430                         // get them one by one and pass them to the helper
 431                         while (!data.empty()) {
 432                                 string database;
 433                                 data = split(data, database, ',');
 434                                 database = ChangeExtension(database, "bib");
 435                                 lyxerr[Debug::LATEX] << "Bibtex database: `"
 436                                                      << database << "'" << endl;
 437                                 aux_info.databases.insert(database);
 438                         }
 439                 } else if (reg3.exact_match(token)) {
 440                         LRegex::SubMatches const & sub = reg3.exec(token);
 441                         string style = LSubstring(token, sub[1].first,
 442                                                   sub[1].second);
 443                         // token is now the style file
 444                         // pass it to the helper
 445                         style = ChangeExtension(style, "bst");
 446                         lyxerr[Debug::LATEX] << "Bibtex style: `"
 447                                              << style << "'" << endl;
 448                         aux_info.styles.insert(style);
 449                 } else if (reg4.exact_match(token)) {
 450                         LRegex::SubMatches const & sub = reg4.exec(token);
 451                         string file2 = LSubstring(token, sub[1].first,
 452                                                   sub[1].second);
 453                         scanAuxFile(file2, aux_info);
 454                 }
 455         }
 456 }
 457
 458
 459 void LaTeX::updateBibtexDependencies(DepTable & dep,
 460                                      vector<Aux_Info> const & bibtex_info)
 461 {
 462         // Since a run of Bibtex mandates more latex runs it is ok to
 463         // remove all ".bib" and ".bst" files.
 464         dep.remove_files_with_extension(".bib");
 465         dep.remove_files_with_extension(".bst");
 466         string aux = OnlyFilename(ChangeExtension(file, ".aux"));
 467
 468         for (vector<Aux_Info>::const_iterator it = bibtex_info.begin();
 469              it != bibtex_info.end(); ++it) {
 470                 for (set<string>::const_iterator it2 = it->databases.begin();
 471                      it2 != it->databases.end(); ++it2) {
 472                         string file = findtexfile(*it2, "bib");
 473                         if (!file.empty())
 474                                 dep.insert(file, true);
 475                 }
 476
 477                 for (set<string>::const_iterator it2 = it->styles.begin();
 478                      it2 != it->styles.end(); ++it2) {
 479                         string file = findtexfile(*it2, "bst");
 480                         if (!file.empty())
 481                                 dep.insert(file, true);
 482                 }
 483         }
 484 }
 485
 486
 487 bool LaTeX::runBibTeX(vector<Aux_Info> const & bibtex_info)
 488 {
 489         bool result = false;
 490         for (vector<Aux_Info>::const_iterator it = bibtex_info.begin();
 491              it != bibtex_info.end(); ++it) {
 492                 if (it->databases.empty())
 493                         continue;
 494                 result = true;
 495
 496                 string tmp = "bibtex ";
 497                 tmp += OnlyFilename(ChangeExtension(it->aux_file, string()));
 498                 Systemcalls one;
 499                 one.startscript(Systemcalls::System, tmp);
 500         }
 501         // Return whether bibtex was run
 502         return result;
 503 }
 504
 505
 506 int LaTeX::scanLogFile(TeXErrors & terr)
 507 {
 508         int last_line = -1;
 509         int line_count = 1;
 510         int retval = NO_ERRORS;
 511         string tmp = OnlyFilename(ChangeExtension(file, ".log"));
 512         lyxerr[Debug::LATEX] << "Log file: " << tmp << endl;
 513         ifstream ifs(tmp.c_str());
 514
 515         string token;
 516         while (getline(ifs, token)) {
 517                 lyxerr[Debug::LATEX] << "Log line: " << token << endl;
 518
 519                 if (token.empty())
 520                         continue;
 521
 522                 if (prefixIs(token, "LaTeX Warning:")) {
 523                         // Here shall we handle different
 524                         // types of warnings
 525                         retval |= LATEX_WARNING;
 526                         lyxerr[Debug::LATEX] << "LaTeX Warning." << endl;
 527                         if (contains(token, "Rerun to get cross-references")) {
 528                                 retval |= RERUN;
 529                                 lyxerr[Debug::LATEX]
 530                                         << "We should rerun." << endl;
 531                         } else if (contains(token, "Citation")
 532                                    && contains(token, "on page")
 533                                    && contains(token, "undefined")) {
 534                                 retval |= UNDEF_CIT;
 535                         }
 536                 } else if (prefixIs(token, "Package")) {
 537                         // Package warnings
 538                         retval |= PACKAGE_WARNING;
 539                         if (contains(token, "natbib Warning:")) {
 540                                 // Natbib warnings
 541                                 if (contains(token, "Citation")
 542                                     && contains(token, "on page")
 543                                     && contains(token, "undefined")) {
 544                                         retval |= UNDEF_CIT;
 545                                 }
 546                         } else if (contains(token, "run BibTeX")) {
 547                                 retval |= UNDEF_CIT;
 548                         } else if (contains(token, "Rerun LaTeX") ||
 549                                    contains(token, "Rerun to get")) {
 550                                 // at least longtable.sty and bibtopic.sty
 551                                 // might use this.
 552                                 lyxerr[Debug::LATEX]
 553                                         << "We should rerun." << endl;
 554                                 retval |= RERUN;
 555                         }
 556                 } else if (prefixIs(token, "(")) {
 557                         if (contains(token, "Rerun LaTeX") ||
 558                             contains(token, "Rerun to get")) {
 559                                 // Used by natbib
 560                                 lyxerr[Debug::LATEX]
 561                                         << "We should rerun." << endl;
 562                                 retval |= RERUN;
 563                         }
 564                 } else if (prefixIs(token, "! ")) {
 565                         // Ok, we have something that looks like a TeX Error
 566                         // but what do we really have.
 567
 568                         // Just get the error description:
 569                         string desc(token, 2);
 570                         if (contains(token, "LaTeX Error:"))
 571                                 retval |= LATEX_ERROR;
 572                         // get the next line
 573                         string tmp;
 574                         int count = 0;
 575                         do {
 576                                 if (!getline(ifs, tmp))
 577                                         break;
 578                                 if (++count > 10)
 579                                         break;
 580                         } while (!prefixIs(tmp, "l."));
 581                         if (prefixIs(tmp, "l.")) {
 582                                 // we have a latex error
 583                                 retval |=  TEX_ERROR;
 584                                 if (contains(desc, "Package babel Error: You haven't defined the language"))
 585                                         retval |= ERROR_RERUN;
 586                                 // get the line number:
 587                                 int line = 0;
 588                                 sscanf(tmp.c_str(), "l.%d", &line);
 589                                 // get the rest of the message:
 590                                 string errstr(tmp, tmp.find(' '));
 591                                 errstr += '\n';
 592                                 getline(ifs, tmp);
 593                                 while (!contains(errstr, "l.")
 594                                        && !tmp.empty()
 595                                        && !prefixIs(tmp, "! ")
 596                                        && !contains(tmp, "(job aborted")) {
 597                                         errstr += tmp;
 598                                         errstr += "\n";
 599                                         getline(ifs, tmp);
 600                                 }
 601                                 lyxerr[Debug::LATEX]
 602                                         << "line: " << line << '\n'
 603                                         << "Desc: " << desc << '\n'
 604                                         << "Text: " << errstr << endl;
 605                                 if (line == last_line)
 606                                         ++line_count;
 607                                 else {
 608                                         line_count = 1;
 609                                         last_line = line;
 610                                 }
 611                                 if (line_count <= 5) {
 612                                         terr.insertError(line, desc, errstr);
 613                                         ++num_errors;
 614                                 }
 615                         }
 616                 } else {
 617                         // information messages, TeX warnings and other
 618                         // warnings we have not caught earlier.
 619                         if (prefixIs(token, "Overfull ")) {
 620                                 retval |= TEX_WARNING;
 621                         } else if (prefixIs(token, "Underfull ")) {
 622                                 retval |= TEX_WARNING;
 623                         } else if (contains(token, "Rerun to get citations")) {
 624                                 // Natbib seems to use this.
 625                                 retval |= UNDEF_CIT;
 626                         } else if (contains(token, "No pages of output")) {
 627                                 // A dvi file was not created
 628                                 retval |= NO_OUTPUT;
 629                         } else if (contains(token, "That makes 100 errors")) {
 630                                 // More than 100 errors were reprted
 631                                 retval |= TOO_MANY_ERRORS;
 632                         }
 633                 }
 634         }
 635         lyxerr[Debug::LATEX] << "Log line: " << token << endl;
 636         return retval;
 637 }
 638
 639
 640 void LaTeX::deplog(DepTable & head)
 641 {
 642         // This function reads the LaTeX log file end extracts all the external
 643         // files used by the LaTeX run. The files are then entered into the
 644         // dependency file.
 645
 646         string const logfile = OnlyFilename(ChangeExtension(file, ".log"));
 647
 648         LRegex reg1("\\)* *\\(([^ )]+).*");
 649         LRegex reg2("File: ([^ ]+).*");
 650         LRegex reg3("No file ([^ ]+)\\..*");
 651         LRegex reg4("\\\\openout[0-9]+.*=.*`([^ ]+)'\\..*");
 652         LRegex unwanted("^.*\\.(aux|log|dvi|bbl|ind|glo)$");
 653
 654         ifstream ifs(logfile.c_str());
 655         while (ifs) {
 656                 // Ok, the scanning of files here is not sufficient.
 657                 // Sometimes files are named by "File: xxx" only
 658                 // So I think we should use some regexps to find files instead.
 659                 // "(\([^ ]+\)"   should match the "(file " variant
 660                 // "File: \([^ ]+\)" should match the "File: file" variant
 661                 string foundfile;
 662                 string token;
 663                 getline(ifs, token);
 664                 token = strip(token, '\r');
 665                 if (token.empty()) continue;
 666
 667                 if (reg1.exact_match(token)) {
 668                         LRegex::SubMatches const & sub = reg1.exec(token);
 669                         foundfile = LSubstring(token, sub[1].first,
 670                                                sub[1].second);
 671                 } else if (reg2.exact_match(token)) {
 672                         LRegex::SubMatches const & sub = reg2.exec(token);
 673                         foundfile = LSubstring(token, sub[1].first,
 674                                                sub[1].second);
 675                 } else if (reg3.exact_match(token)) {
 676                         LRegex::SubMatches const & sub = reg3.exec(token);
 677                         foundfile = LSubstring(token, sub[1].first,
 678                                                sub[1].second);
 679                 } else if (reg4.exact_match(token)) {
 680                         LRegex::SubMatches const & sub = reg4.exec(token);
 681                         foundfile = LSubstring(token, sub[1].first,
 682                                                sub[1].second);
 683                 } else {
 684                         continue;
 685                 }
 686
 687                 lyxerr[Debug::DEPEND] << "Found file: "
 688                                       << foundfile << endl;
 689
 690                 // Ok now we found a file.
 691                 // Now we should make sure that this is a file that we can
 692                 // access through the normal paths.
 693                 // We will not try any fancy search methods to
 694                 // find the file.
 695
 696                 // (1) foundfile is an
 697                 //     absolute path and should
 698                 //     be inserted.
 699                 if (AbsolutePath(foundfile)) {
 700                         lyxerr[Debug::DEPEND] << "AbsolutePath file: "
 701                                               << foundfile << endl;
 702                         // On initial insert we want to do the update at once
 703                         // since this file can not be a file generated by
 704                         // the latex run.
 705                         if (FileInfo(foundfile).exist())
 706                                 head.insert(foundfile, true);
 707                 }
 708
 709                 // (2) foundfile is in the tmpdir
 710                 //     insert it into head
 711                 else if (FileInfo(OnlyFilename(foundfile)).exist()) {
 712                         if (unwanted.exact_match(foundfile)) {
 713                                 lyxerr[Debug::DEPEND]
 714                                         << "We don't want "
 715                                         << OnlyFilename(foundfile)
 716                                         << " in the dep file"
 717                                         << endl;
 718                         } else if (suffixIs(foundfile, ".tex")) {
 719                                 // This is a tex file generated by LyX
 720                                 // and latex is not likely to change this
 721                                 // during its runs.
 722                                 lyxerr[Debug::DEPEND]
 723                                         << "Tmpdir TeX file: "
 724                                         << OnlyFilename(foundfile)
 725                                         << endl;
 726                                 head.insert(foundfile, true);
 727                         } else {
 728                                 lyxerr[Debug::DEPEND]
 729                                         << "In tmpdir file:"
 730                                         << OnlyFilename(foundfile)
 731                                         << endl;
 732                                 head.insert(OnlyFilename(foundfile));
 733                         }
 734                 } else
 735                         lyxerr[Debug::DEPEND]
 736                                 << "Not a file or we are unable to find it."
 737                                 << endl;
 738         }
 739
 740         // Make sure that the main .tex file is in the dependancy file.
 741         head.insert(OnlyFilename(file), true);
 742 }