src/LaTeX.C

   1 /* This file is part of
   2  * ======================================================
   3  *
   4  *           LyX, The Document Processor
   5  *           Copyright 1995 Matthias Ettrich
   6  *           Copyright 1995-2001 The LyX Team.
   7  *
   8  *           This file is Copyright 1996-2001
   9  *           Lars Gullik Bjønnes
  10  *
  11  * ======================================================
  12  */
  13
  14 #include <config.h>
  15
  16 #ifdef __GNUG__
  17 #pragma implementation
  18 #endif
  19
  20 #include "LaTeX.h"
  21 #include "bufferlist.h"
  22 #include "gettext.h"
  23 #include "lyxfunc.h"
  24 #include "debug.h"
  25 #include "support/filetools.h"
  26 #include "support/FileInfo.h"
  27 #include "support/lstrings.h"
  28 #include "support/lyxlib.h"
  29 #include "support/systemcall.h"
  30 #include "support/os.h"
  31 #include "support/path.h"
  32
  33 #include <boost/regex.hpp>
  34
  35 #include <fstream>
  36 #include <cstdio>  // sscanf
  37
  38 using std::ifstream;
  39 using std::getline;
  40 using std::endl;
  41 using std::vector;
  42 using std::set;
  43 using boost::regex;
  44 using boost::regex_match;
  45 using boost::smatch;
  46
  47 // TODO: in no particular order
  48 // - get rid of the extern BufferList and the call to
  49 //   BufferList::updateIncludedTeXfiles, this should either
  50 //   be done before calling LaTeX::funcs or in a completely
  51 //   different way.
  52 // - the bibtex command options should be supported.
  53 // - the makeindex style files should be taken care of with
  54 //   the dependency mechanism.
  55 // - makeindex commandline options should be supported
  56 // - somewhere support viewing of bibtex and makeindex log files.
  57 // - we should perhaps also scan the bibtex log file
  58 // - we should perhaps also scan the bibtex log file
  59
  60 extern BufferList bufferlist;
  61
  62 /*
  63  * CLASS TEXERRORS
  64  */
  65
  66 void TeXErrors::insertError(int line, string const & error_desc,
  67                             string const & error_text)
  68 {
  69         Error newerr(line, error_desc, error_text);
  70         errors.push_back(newerr);
  71 }
  72
  73 /*
  74  * CLASS LaTeX
  75  */
  76
  77 LaTeX::LaTeX(string const & latex, string const & f, string const & p)
  78                 : cmd(latex), file(f), path(p)
  79 {
  80         num_errors = 0;
  81         depfile = file + ".dep";
  82         if (prefixIs(cmd, "pdf")) { // Do we use pdflatex ?
  83                 depfile += "-pdf";
  84                 output_file = ChangeExtension(file,".pdf");
  85         } else {
  86                 output_file = ChangeExtension(file,".dvi");
  87         }
  88 }
  89
  90
  91 void LaTeX::deleteFilesOnError() const
  92 {
  93         // currently just a dummy function.
  94
  95         // What files do we have to delete?
  96
  97         // This will at least make latex do all the runs
  98         lyx::unlink(depfile);
  99
 100         // but the reason for the error might be in a generated file...
 101
 102         string ofname = OnlyFilename(file);
 103
 104         // bibtex file
 105         string bbl = ChangeExtension(ofname, ".bbl");
 106         lyx::unlink(bbl);
 107
 108         // makeindex file
 109         string ind = ChangeExtension(ofname, ".ind");
 110         lyx::unlink(ind);
 111
 112         // Also remove the aux file
 113         string aux = ChangeExtension(ofname, ".aux");
 114         lyx::unlink(aux);
 115 }
 116
 117
 118 int LaTeX::run(TeXErrors & terr, LyXFunc * lfun)
 119         // We know that this function will only be run if the lyx buffer
 120         // has been changed. We also know that a newly written .tex file
 121         // is always different from the previous one because of the date
 122         // in it. However it seems safe to run latex (at least) on time each
 123         // time the .tex file changes.
 124 {
 125         int scanres = NO_ERRORS;
 126         unsigned int count = 0; // number of times run
 127         num_errors = 0; // just to make sure.
 128         const unsigned int MAX_RUN = 6;
 129         DepTable head; // empty head
 130         bool rerun = false; // rerun requested
 131
 132         // The class LaTeX does not know the temp path.
 133         bufferlist.updateIncludedTeXfiles(lyx::getcwd()); //GetCWD());
 134
 135         // Never write the depfile if an error was encountered.
 136
 137         // 0
 138         // first check if the file dependencies exist:
 139         //     ->If it does exist
 140         //             check if any of the files mentioned in it have
 141         //             changed (done using a checksum).
 142         //                 -> if changed:
 143         //                        run latex once and
 144         //                        remake the dependency file
 145         //                 -> if not changed:
 146         //                        just return there is nothing to do for us.
 147         //     ->if it doesn't exist
 148         //             make it and
 149         //             run latex once (we need to run latex once anyway) and
 150         //             remake the dependency file.
 151         //
 152
 153         FileInfo fi(depfile);
 154         bool had_depfile = fi.exist();
 155         bool run_bibtex = false;
 156         string aux_file = OnlyFilename(ChangeExtension(file, "aux"));
 157
 158         if (had_depfile) {
 159                 lyxerr[Debug::DEPEND] << "Dependency file exists" << endl;
 160                 // Read the dep file:
 161                 head.read(depfile);
 162                 // Update the checksums
 163                 head.update();
 164                 // Can't just check if anything has changed because it might have aborted
 165                 // on error last time... in which cas we need to re-run latex
 166                 // and collect the error messages (even if they are the same).
 167                 if (!FileInfo(output_file).exist()) {
 168                         lyxerr[Debug::DEPEND]
 169                                 << "re-running LaTeX because output file doesn't exist." << endl;
 170                 } else if (!head.sumchange()) {
 171                         lyxerr[Debug::DEPEND] << "return no_change" << endl;
 172                         return NO_CHANGE;
 173                 } else {
 174                         lyxerr[Debug::DEPEND]
 175                                 << "Dependency file has changed" << endl;
 176                 }
 177
 178                 if (head.extchanged(".bib") || head.extchanged(".bst"))
 179                         run_bibtex = true;
 180         } else
 181                 lyxerr[Debug::DEPEND]
 182                         << "Dependency file does not exist" << endl;
 183
 184         /// We scan the aux file even when had_depfile = false,
 185         /// because we can run pdflatex on the file after running latex on it,
 186         /// in which case we will not need to run bibtex again.
 187         vector<Aux_Info> bibtex_info_old;
 188         if (!run_bibtex)
 189                 bibtex_info_old = scanAuxFiles(aux_file);
 190
 191         ++count;
 192         lyxerr[Debug::LATEX] << "Run #" << count << endl;
 193         if (lfun) {
 194                 ostringstream str;
 195                 str << _("LaTeX run number") << ' ' << count;
 196                 lfun->dispatch(LFUN_MESSAGE, str.str().c_str());
 197         }
 198
 199         this->operator()();
 200         scanres = scanLogFile(terr);
 201         if (scanres & ERROR_RERUN) {
 202                 lyxerr[Debug::LATEX] << "Rerunning LaTeX" << endl;
 203                 this->operator()();
 204                 scanres = scanLogFile(terr);
 205         }
 206
 207         if (scanres & ERRORS) {
 208                 deleteFilesOnError();
 209                 return scanres; // return on error
 210         }
 211
 212         vector<Aux_Info> const bibtex_info = scanAuxFiles(aux_file);
 213         if (!run_bibtex && bibtex_info_old != bibtex_info)
 214                 run_bibtex = true;
 215
 216         // update the dependencies.
 217         deplog(head); // reads the latex log
 218         head.update();
 219
 220         // 0.5
 221         // At this point we must run external programs if needed.
 222         // makeindex will be run if a .idx file changed or was generated.
 223         // And if there were undefined citations or changes in references
 224         // the .aux file is checked for signs of bibtex. Bibtex is then run
 225         // if needed.
 226
 227         // run makeindex
 228         if (head.haschanged(OnlyFilename(ChangeExtension(file, ".idx")))) {
 229                 // no checks for now
 230                 lyxerr[Debug::LATEX] << "Running MakeIndex." << endl;
 231                 if (lfun) {
 232                         lfun->dispatch(LFUN_MESSAGE, _("Running MakeIndex."));
 233                 }
 234
 235                 rerun = runMakeIndex(OnlyFilename(ChangeExtension(file, ".idx")));
 236         }
 237
 238         // run bibtex
 239         // if (scanres & UNDEF_CIT || scanres & RERUN || run_bibtex)
 240         if (scanres & UNDEF_CIT || run_bibtex) {
 241                 // Here we must scan the .aux file and look for
 242                 // "\bibdata" and/or "\bibstyle". If one of those
 243                 // tags is found -> run bibtex and set rerun = true;
 244                 // no checks for now
 245                 lyxerr[Debug::LATEX] << "Running BibTeX." << endl;
 246                 if (lfun) {
 247                         lfun->dispatch(LFUN_MESSAGE, _("Running BibTeX."));
 248                 }
 249
 250                 updateBibtexDependencies(head, bibtex_info);
 251                 rerun |= runBibTeX(bibtex_info);
 252         } else if (!had_depfile) {
 253                 /// If we run pdflatex on the file after running latex on it,
 254                 /// then we do not need to run bibtex, but we do need to
 255                 /// insert the .bib and .bst files into the .dep-pdf file.
 256                 updateBibtexDependencies(head, bibtex_info);
 257         }
 258
 259         // 1
 260         // we know on this point that latex has been run once (or we just
 261         // returned) and the question now is to decide if we need to run
 262         // it any more. This is done by asking if any of the files in the
 263         // dependency file has changed. (remember that the checksum for
 264         // a given file is reported to have changed if it just was created)
 265         //     -> if changed or rerun == true:
 266         //             run latex once more and
 267         //             update the dependency structure
 268         //     -> if not changed:
 269         //             we does nothing at this point
 270         //
 271         if (rerun || head.sumchange()) {
 272                 rerun = false;
 273                 ++count;
 274                 lyxerr[Debug::DEPEND]
 275                         << "Dep. file has changed or rerun requested" << endl;
 276                 lyxerr[Debug::LATEX]
 277                         << "Run #" << count << endl;
 278                 if (lfun) {
 279                         ostringstream str;
 280                         str << _("LaTeX run number") << ' ' << count;
 281                         lfun->dispatch(LFUN_MESSAGE, str.str().c_str());
 282                 }
 283
 284                 this->operator()();
 285                 scanres = scanLogFile(terr);
 286                 if (scanres & ERRORS) {
 287                         deleteFilesOnError();
 288                         return scanres; // return on error
 289                 }
 290
 291                 // update the depedencies
 292                 deplog(head); // reads the latex log
 293                 head.update();
 294         } else {
 295                 lyxerr[Debug::DEPEND] << "Dep. file has NOT changed" << endl;
 296         }
 297
 298         // 1.5
 299         // The inclusion of files generated by external programs like
 300         // makeindex or bibtex might have done changes to pagenumbereing,
 301         // etc. And because of this we must run the external programs
 302         // again to make sure everything is redone correctly.
 303         // Also there should be no need to run the external programs any
 304         // more after this.
 305
 306         // run makeindex if the <file>.idx has changed or was generated.
 307         if (head.haschanged(OnlyFilename(ChangeExtension(file, ".idx")))) {
 308                 // no checks for now
 309                 lyxerr[Debug::LATEX] << "Running MakeIndex." << endl;
 310                 if (lfun) {
 311                         lfun->dispatch(LFUN_MESSAGE, _("Running MakeIndex."));
 312                 }
 313
 314                 rerun = runMakeIndex(OnlyFilename(ChangeExtension(file, ".idx")));
 315         }
 316
 317         // 2
 318         // we will only run latex more if the log file asks for it.
 319         // or if the sumchange() is true.
 320         //     -> rerun asked for:
 321         //             run latex and
 322         //             remake the dependency file
 323         //             goto 2 or return if max runs are reached.
 324         //     -> rerun not asked for:
 325         //             just return (fall out of bottom of func)
 326         //
 327         while ((head.sumchange() || rerun || (scanres & RERUN))
 328                && count < MAX_RUN) {
 329                 // Yes rerun until message goes away, or until
 330                 // MAX_RUNS are reached.
 331                 rerun = false;
 332                 ++count;
 333                 lyxerr[Debug::LATEX] << "Run #" << count << endl;
 334                 if (lfun) {
 335                         ostringstream str;
 336                         str << _("LaTeX run number") << ' ' << count;
 337                         lfun->dispatch(LFUN_MESSAGE, str.str().c_str());
 338                 }
 339
 340                 this->operator()();
 341                 scanres = scanLogFile(terr);
 342                 if (scanres & ERRORS) {
 343                         deleteFilesOnError();
 344                         return scanres; // return on error
 345                 }
 346
 347                 // keep this updated
 348                 head.update();
 349         }
 350
 351         // Write the dependencies to file.
 352         head.write(depfile);
 353         lyxerr[Debug::LATEX] << "Done." << endl;
 354         return scanres;
 355 }
 356
 357
 358 int LaTeX::operator()()
 359 {
 360 #ifndef __EMX__
 361         string tmp = cmd + ' ' + QuoteName(file) + " > /dev/null";
 362 #else // cmd.exe (OS/2) causes SYS0003 error at "/dev/null"
 363         string tmp = cmd + ' ' + file + " > nul";
 364 #endif
 365         Systemcall one;
 366         return one.startscript(Systemcall::Wait, tmp);
 367 }
 368
 369
 370 bool LaTeX::runMakeIndex(string const & f)
 371 {
 372         lyxerr[Debug::LATEX] << "idx file has been made,"
 373                 " running makeindex on file "
 374                              <<  f << endl;
 375
 376         // It should be possible to set the switches for makeindex
 377         // sorting style and such. It would also be very convenient
 378         // to be able to make style files from within LyX. This has
 379         // to come for a later time.
 380         string tmp = "makeindex -c -q ";
 381         tmp += f;
 382         Systemcall one;
 383         one.startscript(Systemcall::Wait, tmp);
 384         return true;
 385 }
 386
 387
 388 vector<Aux_Info> const
 389 LaTeX::scanAuxFiles(string const & file)
 390 {
 391         vector<Aux_Info> result;
 392
 393         result.push_back(scanAuxFile(file));
 394
 395         for (int i = 1; i < 1000; ++i) {
 396                 string file2 = ChangeExtension(file, "") + "." + tostr(i)
 397                         + ".aux";
 398                 FileInfo fi(file2);
 399                 if (!fi.exist())
 400                         break;
 401                 result.push_back(scanAuxFile(file2));
 402         }
 403         return result;
 404 }
 405
 406
 407 Aux_Info const LaTeX::scanAuxFile(string const & file)
 408 {
 409         Aux_Info result;
 410         result.aux_file = file;
 411         scanAuxFile(file, result);
 412         return result;
 413 }
 414
 415
 416 void LaTeX::scanAuxFile(string const & file, Aux_Info & aux_info)
 417 {
 418         lyxerr[Debug::LATEX] << "Scanning aux file: " << file << endl;
 419
 420         ifstream ifs(file.c_str());
 421         string token;
 422         regex reg1("\\\\citation\\{([^}]+)\\}");
 423         regex reg2("\\\\bibdata\\{([^}]+)\\}");
 424         regex reg3("\\\\bibstyle\\{([^}]+)\\}");
 425         regex reg4("\\\\@input\\{([^}]+)\\}");
 426
 427         while (getline(ifs, token)) {
 428                 token = strip(token, '\r');
 429                 smatch sub;
 430                 if (regex_match(token, sub, reg1)) {
 431                         string data = sub[1];
 432                         while (!data.empty()) {
 433                                 string citation;
 434                                 data = split(data, citation, ',');
 435                                 lyxerr[Debug::LATEX] << "Citation: "
 436                                                      << citation << endl;
 437                                 aux_info.citations.insert(citation);
 438                         }
 439                 } else if (regex_match(token, sub, reg2)) {
 440                         string data = sub[1];
 441                         // data is now all the bib files separated by ','
 442                         // get them one by one and pass them to the helper
 443                         while (!data.empty()) {
 444                                 string database;
 445                                 data = split(data, database, ',');
 446                                 database = ChangeExtension(database, "bib");
 447                                 lyxerr[Debug::LATEX] << "Bibtex database: `"
 448                                                      << database << "'" << endl;
 449                                 aux_info.databases.insert(database);
 450                         }
 451                 } else if (regex_match(token, sub, reg3)) {
 452                         string style = sub[1];
 453                         // token is now the style file
 454                         // pass it to the helper
 455                         style = ChangeExtension(style, "bst");
 456                         lyxerr[Debug::LATEX] << "Bibtex style: `"
 457                                              << style << "'" << endl;
 458                         aux_info.styles.insert(style);
 459                 } else if (regex_match(token, sub, reg4)) {
 460                         string file2 = sub[1];
 461                         scanAuxFile(file2, aux_info);
 462                 }
 463         }
 464 }
 465
 466
 467 void LaTeX::updateBibtexDependencies(DepTable & dep,
 468                                      vector<Aux_Info> const & bibtex_info)
 469 {
 470         // Since a run of Bibtex mandates more latex runs it is ok to
 471         // remove all ".bib" and ".bst" files.
 472         dep.remove_files_with_extension(".bib");
 473         dep.remove_files_with_extension(".bst");
 474         //string aux = OnlyFilename(ChangeExtension(file, ".aux"));
 475
 476         for (vector<Aux_Info>::const_iterator it = bibtex_info.begin();
 477              it != bibtex_info.end(); ++it) {
 478                 for (set<string>::const_iterator it2 = it->databases.begin();
 479                      it2 != it->databases.end(); ++it2) {
 480                         string file = findtexfile(*it2, "bib");
 481                         if (!file.empty())
 482                                 dep.insert(file, true);
 483                 }
 484
 485                 for (set<string>::const_iterator it2 = it->styles.begin();
 486                      it2 != it->styles.end(); ++it2) {
 487                         string file = findtexfile(*it2, "bst");
 488                         if (!file.empty())
 489                                 dep.insert(file, true);
 490                 }
 491         }
 492 }
 493
 494
 495 bool LaTeX::runBibTeX(vector<Aux_Info> const & bibtex_info)
 496 {
 497         bool result = false;
 498         for (vector<Aux_Info>::const_iterator it = bibtex_info.begin();
 499              it != bibtex_info.end(); ++it) {
 500                 if (it->databases.empty())
 501                         continue;
 502                 result = true;
 503
 504                 string tmp = "bibtex ";
 505                 tmp += OnlyFilename(ChangeExtension(it->aux_file, string()));
 506                 Systemcall one;
 507                 one.startscript(Systemcall::Wait, tmp);
 508         }
 509         // Return whether bibtex was run
 510         return result;
 511 }
 512
 513
 514 int LaTeX::scanLogFile(TeXErrors & terr)
 515 {
 516         int last_line = -1;
 517         int line_count = 1;
 518         int retval = NO_ERRORS;
 519         string tmp = OnlyFilename(ChangeExtension(file, ".log"));
 520         lyxerr[Debug::LATEX] << "Log file: " << tmp << endl;
 521         ifstream ifs(tmp.c_str());
 522
 523         string token;
 524         while (getline(ifs, token)) {
 525                 lyxerr[Debug::LATEX] << "Log line: " << token << endl;
 526
 527                 if (token.empty())
 528                         continue;
 529
 530                 if (prefixIs(token, "LaTeX Warning:")) {
 531                         // Here shall we handle different
 532                         // types of warnings
 533                         retval |= LATEX_WARNING;
 534                         lyxerr[Debug::LATEX] << "LaTeX Warning." << endl;
 535                         if (contains(token, "Rerun to get cross-references")) {
 536                                 retval |= RERUN;
 537                                 lyxerr[Debug::LATEX]
 538                                         << "We should rerun." << endl;
 539                         } else if (contains(token, "Citation")
 540                                    && contains(token, "on page")
 541                                    && contains(token, "undefined")) {
 542                                 retval |= UNDEF_CIT;
 543                         }
 544                 } else if (prefixIs(token, "Package")) {
 545                         // Package warnings
 546                         retval |= PACKAGE_WARNING;
 547                         if (contains(token, "natbib Warning:")) {
 548                                 // Natbib warnings
 549                                 if (contains(token, "Citation")
 550                                     && contains(token, "on page")
 551                                     && contains(token, "undefined")) {
 552                                         retval |= UNDEF_CIT;
 553                                 }
 554                         } else if (contains(token, "run BibTeX")) {
 555                                 retval |= UNDEF_CIT;
 556                         } else if (contains(token, "Rerun LaTeX") ||
 557                                    contains(token, "Rerun to get")) {
 558                                 // at least longtable.sty and bibtopic.sty
 559                                 // might use this.
 560                                 lyxerr[Debug::LATEX]
 561                                         << "We should rerun." << endl;
 562                                 retval |= RERUN;
 563                         }
 564                 } else if (prefixIs(token, "(")) {
 565                         if (contains(token, "Rerun LaTeX") ||
 566                             contains(token, "Rerun to get")) {
 567                                 // Used by natbib
 568                                 lyxerr[Debug::LATEX]
 569                                         << "We should rerun." << endl;
 570                                 retval |= RERUN;
 571                         }
 572                 } else if (prefixIs(token, "! ")) {
 573                         // Ok, we have something that looks like a TeX Error
 574                         // but what do we really have.
 575
 576                         // Just get the error description:
 577                         string desc(token, 2);
 578                         if (contains(token, "LaTeX Error:"))
 579                                 retval |= LATEX_ERROR;
 580                         // get the next line
 581                         string tmp;
 582                         int count = 0;
 583                         do {
 584                                 if (!getline(ifs, tmp))
 585                                         break;
 586                                 if (++count > 10)
 587                                         break;
 588                         } while (!prefixIs(tmp, "l."));
 589                         if (prefixIs(tmp, "l.")) {
 590                                 // we have a latex error
 591                                 retval |=  TEX_ERROR;
 592                                 if (contains(desc, "Package babel Error: You haven't defined the language"))
 593                                         retval |= ERROR_RERUN;
 594                                 // get the line number:
 595                                 int line = 0;
 596                                 sscanf(tmp.c_str(), "l.%d", &line);
 597                                 // get the rest of the message:
 598                                 string errstr(tmp, tmp.find(' '));
 599                                 errstr += '\n';
 600                                 getline(ifs, tmp);
 601                                 while (!contains(errstr, "l.")
 602                                        && !tmp.empty()
 603                                        && !prefixIs(tmp, "! ")
 604                                        && !contains(tmp, "(job aborted")) {
 605                                         errstr += tmp;
 606                                         errstr += "\n";
 607                                         getline(ifs, tmp);
 608                                 }
 609                                 lyxerr[Debug::LATEX]
 610                                         << "line: " << line << '\n'
 611                                         << "Desc: " << desc << '\n'
 612                                         << "Text: " << errstr << endl;
 613                                 if (line == last_line)
 614                                         ++line_count;
 615                                 else {
 616                                         line_count = 1;
 617                                         last_line = line;
 618                                 }
 619                                 if (line_count <= 5) {
 620                                         terr.insertError(line, desc, errstr);
 621                                         ++num_errors;
 622                                 }
 623                         }
 624                 } else {
 625                         // information messages, TeX warnings and other
 626                         // warnings we have not caught earlier.
 627                         if (prefixIs(token, "Overfull ")) {
 628                                 retval |= TEX_WARNING;
 629                         } else if (prefixIs(token, "Underfull ")) {
 630                                 retval |= TEX_WARNING;
 631                         } else if (contains(token, "Rerun to get citations")) {
 632                                 // Natbib seems to use this.
 633                                 retval |= UNDEF_CIT;
 634                         } else if (contains(token, "No pages of output")) {
 635                                 // A dvi file was not created
 636                                 retval |= NO_OUTPUT;
 637                         } else if (contains(token, "That makes 100 errors")) {
 638                                 // More than 100 errors were reprted
 639                                 retval |= TOO_MANY_ERRORS;
 640                         }
 641                 }
 642         }
 643         lyxerr[Debug::LATEX] << "Log line: " << token << endl;
 644         return retval;
 645 }
 646
 647
 648 void LaTeX::deplog(DepTable & head)
 649 {
 650         // This function reads the LaTeX log file end extracts all the external
 651         // files used by the LaTeX run. The files are then entered into the
 652         // dependency file.
 653
 654         string const logfile = OnlyFilename(ChangeExtension(file, ".log"));
 655
 656         regex reg1("\\)* *\\(([^ )]+).*");
 657         regex reg2("File: ([^ ]+).*");
 658         regex reg3("No file ([^ ]+)\\..*");
 659         regex reg4("\\\\openout[0-9]+.*=.*`([^ ]+)'\\..*");
 660         // If an index should be created, MikTex does not write a line like
 661         //    \openout# = 'sample,idx'.
 662         // but intstead only a line like this into the log:
 663         //   Writing index file sample.idx
 664         regex reg5("Writing index file ([^ ]+).*");
 665         regex unwanted("^.*\\.(aux|log|dvi|bbl|ind|glo)$");
 666
 667         ifstream ifs(logfile.c_str());
 668         while (ifs) {
 669                 // Ok, the scanning of files here is not sufficient.
 670                 // Sometimes files are named by "File: xxx" only
 671                 // So I think we should use some regexps to find files instead.
 672                 // "(\([^ ]+\)"   should match the "(file " variant
 673                 // "File: \([^ ]+\)" should match the "File: file" variant
 674                 string foundfile;
 675                 string token;
 676                 getline(ifs, token);
 677                 token = strip(token, '\r');
 678                 if (token.empty()) continue;
 679
 680                 smatch sub;
 681                 if (regex_match(token, sub, reg1)) {
 682                         foundfile = sub[1];
 683                 } else if (regex_match(token, sub, reg2)) {
 684                         foundfile = sub[1];
 685                 } else if (regex_match(token, sub, reg3)) {
 686                         foundfile = sub[1];
 687                 } else if (regex_match(token, sub, reg4)) {
 688                         foundfile = sub[1];
 689                 } else if (regex_match(token, sub, reg5)) {
 690                         foundfile = sub[1];
 691                 } else {
 692                         continue;
 693                 }
 694
 695                 // convert from native os path to unix path
 696                 foundfile = os::internal_path(foundfile);
 697
 698                 lyxerr[Debug::DEPEND] << "Found file: "
 699                                       << foundfile << endl;
 700
 701                 // Ok now we found a file.
 702                 // Now we should make sure that this is a file that we can
 703                 // access through the normal paths.
 704                 // We will not try any fancy search methods to
 705                 // find the file.
 706
 707                 // (1) foundfile is an
 708                 //     absolute path and should
 709                 //     be inserted.
 710                 if (AbsolutePath(foundfile)) {
 711                         lyxerr[Debug::DEPEND] << "AbsolutePath file: "
 712                                               << foundfile << endl;
 713                         // On initial insert we want to do the update at once
 714                         // since this file can not be a file generated by
 715                         // the latex run.
 716                         if (FileInfo(foundfile).exist())
 717                                 head.insert(foundfile, true);
 718                 }
 719
 720                 // (2) foundfile is in the tmpdir
 721                 //     insert it into head
 722                 else if (FileInfo(OnlyFilename(foundfile)).exist()) {
 723                         if (regex_match(foundfile, unwanted)) {
 724                                 lyxerr[Debug::DEPEND]
 725                                         << "We don't want "
 726                                         << OnlyFilename(foundfile)
 727                                         << " in the dep file"
 728                                         << endl;
 729                         } else if (suffixIs(foundfile, ".tex")) {
 730                                 // This is a tex file generated by LyX
 731                                 // and latex is not likely to change this
 732                                 // during its runs.
 733                                 lyxerr[Debug::DEPEND]
 734                                         << "Tmpdir TeX file: "
 735                                         << OnlyFilename(foundfile)
 736                                         << endl;
 737                                 head.insert(foundfile, true);
 738                         } else {
 739                                 lyxerr[Debug::DEPEND]
 740                                         << "In tmpdir file:"
 741                                         << OnlyFilename(foundfile)
 742                                         << endl;
 743                                 head.insert(OnlyFilename(foundfile));
 744                         }
 745                 } else
 746                         lyxerr[Debug::DEPEND]
 747                                 << "Not a file or we are unable to find it."
 748                                 << endl;
 749         }
 750
 751         // Make sure that the main .tex file is in the dependancy file.
 752         head.insert(OnlyFilename(file), true);
 753 }