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 #include "LaTeX.h"
  17 #include "bufferlist.h"
  18 #include "gettext.h"
  19 #include "lyxfunc.h"
  20 #include "debug.h"
  21 #include "funcrequest.h"
  22 #include "support/filetools.h"
  23 #include "support/FileInfo.h"
  24 #include "support/lstrings.h"
  25 #include "support/lyxlib.h"
  26 #include "support/systemcall.h"
  27 #include "support/os.h"
  28 #include "support/path.h"
  29
  30 #include <boost/regex.hpp>
  31 #include "BoostFormat.h"
  32
  33 #include <fstream>
  34 #include <cstdio>  // sscanf
  35
  36 #ifndef CXX_GLOBAL_CSTD
  37 using std::sscanf;
  38 #endif
  39
  40 using std::ifstream;
  41 using std::getline;
  42 using std::endl;
  43 using std::vector;
  44 using std::set;
  45 using boost::regex;
  46 using boost::regex_match;
  47
  48 #ifndef USE_INCLUDED_STRING
  49 using boost::smatch;
  50 #else
  51 using boost::cmatch;
  52 #endif
  53
  54 // TODO: in no particular order
  55 // - get rid of the extern BufferList and the call to
  56 //   BufferList::updateIncludedTeXfiles, this should either
  57 //   be done before calling LaTeX::funcs or in a completely
  58 //   different way.
  59 // - the bibtex command options should be supported.
  60 // - the makeindex style files should be taken care of with
  61 //   the dependency mechanism.
  62 // - makeindex commandline options should be supported
  63 // - somewhere support viewing of bibtex and makeindex log files.
  64 // - we should perhaps also scan the bibtex log file
  65 // - we should perhaps also scan the bibtex log file
  66
  67 extern BufferList bufferlist;
  68
  69 namespace {
  70
  71 void showRunMessage(LyXFunc * lf, unsigned int count)
  72 {
  73         ostringstream str;
  74 #if USE_BOOST_FORMAT
  75         str << boost::format(_("Waiting for LaTeX run number %1$d")) % count;
  76 #else
  77         str << _("Waiting for LaTeX run number ") << count;
  78 #endif
  79         lf->dispatch(FuncRequest(LFUN_MESSAGE, STRCONV(str.str())));
  80 }
  81
  82
  83 };
  84 /*
  85  * CLASS TEXERRORS
  86  */
  87
  88 void TeXErrors::insertError(int line, string const & error_desc,
  89                             string const & error_text)
  90 {
  91         Error newerr(line, error_desc, error_text);
  92         errors.push_back(newerr);
  93 }
  94
  95 /*
  96  * CLASS LaTeX
  97  */
  98
  99 LaTeX::LaTeX(string const & latex, string const & f, string const & p)
 100                 : cmd(latex), file(f), path(p)
 101 {
 102         num_errors = 0;
 103         depfile = file + ".dep";
 104         if (prefixIs(cmd, "pdf")) { // Do we use pdflatex ?
 105                 depfile += "-pdf";
 106                 output_file = ChangeExtension(file,".pdf");
 107         } else {
 108                 output_file = ChangeExtension(file,".dvi");
 109         }
 110 }
 111
 112
 113 void LaTeX::deleteFilesOnError() const
 114 {
 115         // currently just a dummy function.
 116
 117         // What files do we have to delete?
 118
 119         // This will at least make latex do all the runs
 120         lyx::unlink(depfile);
 121
 122         // but the reason for the error might be in a generated file...
 123
 124         string const ofname = OnlyFilename(file);
 125
 126         // bibtex file
 127         string const bbl = ChangeExtension(ofname, ".bbl");
 128         lyx::unlink(bbl);
 129
 130         // makeindex file
 131         string const ind = ChangeExtension(ofname, ".ind");
 132         lyx::unlink(ind);
 133
 134         // Also remove the aux file
 135         string const aux = ChangeExtension(ofname, ".aux");
 136         lyx::unlink(aux);
 137 }
 138
 139
 140 int LaTeX::run(TeXErrors & terr, LyXFunc * lfun)
 141         // We know that this function will only be run if the lyx buffer
 142         // has been changed. We also know that a newly written .tex file
 143         // is always different from the previous one because of the date
 144         // in it. However it seems safe to run latex (at least) on time each
 145         // time the .tex file changes.
 146 {
 147         int scanres = NO_ERRORS;
 148         unsigned int count = 0; // number of times run
 149         num_errors = 0; // just to make sure.
 150         unsigned int const MAX_RUN = 6;
 151         DepTable head; // empty head
 152         bool rerun = false; // rerun requested
 153
 154         // The class LaTeX does not know the temp path.
 155         bufferlist.updateIncludedTeXfiles(lyx::getcwd());
 156
 157         // Never write the depfile if an error was encountered.
 158
 159         // 0
 160         // first check if the file dependencies exist:
 161         //     ->If it does exist
 162         //             check if any of the files mentioned in it have
 163         //             changed (done using a checksum).
 164         //                 -> if changed:
 165         //                        run latex once and
 166         //                        remake the dependency file
 167         //                 -> if not changed:
 168         //                        just return there is nothing to do for us.
 169         //     ->if it doesn't exist
 170         //             make it and
 171         //             run latex once (we need to run latex once anyway) and
 172         //             remake the dependency file.
 173         //
 174
 175         FileInfo fi(depfile);
 176         bool had_depfile = fi.exist();
 177         bool run_bibtex = false;
 178         string aux_file = OnlyFilename(ChangeExtension(file, "aux"));
 179
 180         if (had_depfile) {
 181                 lyxerr[Debug::DEPEND] << "Dependency file exists" << endl;
 182                 // Read the dep file:
 183                 head.read(depfile);
 184                 // Update the checksums
 185                 head.update();
 186                 // Can't just check if anything has changed because it might have aborted
 187                 // on error last time... in which cas we need to re-run latex
 188                 // and collect the error messages (even if they are the same).
 189                 if (!FileInfo(output_file).exist()) {
 190                         lyxerr[Debug::DEPEND]
 191                                 << "re-running LaTeX because output file doesn't exist." << endl;
 192                 } else if (!head.sumchange()) {
 193                         lyxerr[Debug::DEPEND] << "return no_change" << endl;
 194                         return NO_CHANGE;
 195                 } else {
 196                         lyxerr[Debug::DEPEND]
 197                                 << "Dependency file has changed" << endl;
 198                 }
 199
 200                 if (head.extchanged(".bib") || head.extchanged(".bst"))
 201                         run_bibtex = true;
 202         } else
 203                 lyxerr[Debug::DEPEND]
 204                         << "Dependency file does not exist" << endl;
 205
 206         /// We scan the aux file even when had_depfile = false,
 207         /// because we can run pdflatex on the file after running latex on it,
 208         /// in which case we will not need to run bibtex again.
 209         vector<Aux_Info> bibtex_info_old;
 210         if (!run_bibtex)
 211                 bibtex_info_old = scanAuxFiles(aux_file);
 212
 213         ++count;
 214         lyxerr[Debug::LATEX] << "Run #" << count << endl;
 215         if (lfun) {
 216                 showRunMessage(lfun, count);
 217         }
 218
 219         this->operator()();
 220         scanres = scanLogFile(terr);
 221         if (scanres & ERROR_RERUN) {
 222                 lyxerr[Debug::LATEX] << "Rerunning LaTeX" << endl;
 223                 this->operator()();
 224                 scanres = scanLogFile(terr);
 225         }
 226
 227         if (scanres & ERRORS) {
 228                 deleteFilesOnError();
 229                 return scanres; // return on error
 230         }
 231
 232         vector<Aux_Info> const bibtex_info = scanAuxFiles(aux_file);
 233         if (!run_bibtex && bibtex_info_old != bibtex_info)
 234                 run_bibtex = true;
 235
 236         // update the dependencies.
 237         deplog(head); // reads the latex log
 238         head.update();
 239
 240         // 0.5
 241         // At this point we must run external programs if needed.
 242         // makeindex will be run if a .idx file changed or was generated.
 243         // And if there were undefined citations or changes in references
 244         // the .aux file is checked for signs of bibtex. Bibtex is then run
 245         // if needed.
 246
 247         // run makeindex
 248         if (head.haschanged(OnlyFilename(ChangeExtension(file, ".idx")))) {
 249                 // no checks for now
 250                 lyxerr[Debug::LATEX] << "Running MakeIndex." << endl;
 251                 if (lfun) {
 252                         lfun->dispatch(FuncRequest(LFUN_MESSAGE, _("Running MakeIndex.")));
 253                 }
 254
 255                 rerun = runMakeIndex(OnlyFilename(ChangeExtension(file, ".idx")));
 256         }
 257
 258         // run bibtex
 259         // if (scanres & UNDEF_CIT || scanres & RERUN || run_bibtex)
 260         if (scanres & UNDEF_CIT || run_bibtex) {
 261                 // Here we must scan the .aux file and look for
 262                 // "\bibdata" and/or "\bibstyle". If one of those
 263                 // tags is found -> run bibtex and set rerun = true;
 264                 // no checks for now
 265                 lyxerr[Debug::LATEX] << "Running BibTeX." << endl;
 266                 if (lfun) {
 267                         lfun->dispatch(FuncRequest(LFUN_MESSAGE, _("Running BibTeX.")));
 268                 }
 269
 270                 updateBibtexDependencies(head, bibtex_info);
 271                 rerun |= runBibTeX(bibtex_info);
 272         } else if (!had_depfile) {
 273                 /// If we run pdflatex on the file after running latex on it,
 274                 /// then we do not need to run bibtex, but we do need to
 275                 /// insert the .bib and .bst files into the .dep-pdf file.
 276                 updateBibtexDependencies(head, bibtex_info);
 277         }
 278
 279         // 1
 280         // we know on this point that latex has been run once (or we just
 281         // returned) and the question now is to decide if we need to run
 282         // it any more. This is done by asking if any of the files in the
 283         // dependency file has changed. (remember that the checksum for
 284         // a given file is reported to have changed if it just was created)
 285         //     -> if changed or rerun == true:
 286         //             run latex once more and
 287         //             update the dependency structure
 288         //     -> if not changed:
 289         //             we does nothing at this point
 290         //
 291         if (rerun || head.sumchange()) {
 292                 rerun = false;
 293                 ++count;
 294                 lyxerr[Debug::DEPEND]
 295                         << "Dep. file has changed or rerun requested" << endl;
 296                 lyxerr[Debug::LATEX]
 297                         << "Run #" << count << endl;
 298                 if (lfun) {
 299                         showRunMessage(lfun, count);
 300                 }
 301
 302                 this->operator()();
 303                 scanres = scanLogFile(terr);
 304                 if (scanres & ERRORS) {
 305                         deleteFilesOnError();
 306                         return scanres; // return on error
 307                 }
 308
 309                 // update the depedencies
 310                 deplog(head); // reads the latex log
 311                 head.update();
 312         } else {
 313                 lyxerr[Debug::DEPEND] << "Dep. file has NOT changed" << endl;
 314         }
 315
 316         // 1.5
 317         // The inclusion of files generated by external programs like
 318         // makeindex or bibtex might have done changes to pagenumbereing,
 319         // etc. And because of this we must run the external programs
 320         // again to make sure everything is redone correctly.
 321         // Also there should be no need to run the external programs any
 322         // more after this.
 323
 324         // run makeindex if the <file>.idx has changed or was generated.
 325         if (head.haschanged(OnlyFilename(ChangeExtension(file, ".idx")))) {
 326                 // no checks for now
 327                 lyxerr[Debug::LATEX] << "Running MakeIndex." << endl;
 328                 if (lfun) {
 329                         lfun->dispatch(FuncRequest(LFUN_MESSAGE, _("Running MakeIndex.")));
 330                 }
 331
 332                 rerun = runMakeIndex(OnlyFilename(ChangeExtension(file, ".idx")));
 333         }
 334
 335         // 2
 336         // we will only run latex more if the log file asks for it.
 337         // or if the sumchange() is true.
 338         //     -> rerun asked for:
 339         //             run latex and
 340         //             remake the dependency file
 341         //             goto 2 or return if max runs are reached.
 342         //     -> rerun not asked for:
 343         //             just return (fall out of bottom of func)
 344         //
 345         while ((head.sumchange() || rerun || (scanres & RERUN))
 346                && count < MAX_RUN) {
 347                 // Yes rerun until message goes away, or until
 348                 // MAX_RUNS are reached.
 349                 rerun = false;
 350                 ++count;
 351                 lyxerr[Debug::LATEX] << "Run #" << count << endl;
 352                 if (lfun) {
 353                         showRunMessage(lfun, count);
 354                 }
 355
 356                 this->operator()();
 357                 scanres = scanLogFile(terr);
 358                 if (scanres & ERRORS) {
 359                         deleteFilesOnError();
 360                         return scanres; // return on error
 361                 }
 362
 363                 // keep this updated
 364                 head.update();
 365         }
 366
 367         // Write the dependencies to file.
 368         head.write(depfile);
 369         lyxerr[Debug::LATEX] << "Done." << endl;
 370         return scanres;
 371 }
 372
 373
 374 int LaTeX::operator()()
 375 {
 376 #ifndef __EMX__
 377         string tmp = cmd + ' ' + QuoteName(file) + " > /dev/null";
 378 #else // cmd.exe (OS/2) causes SYS0003 error at "/dev/null"
 379         string tmp = cmd + ' ' + file + " > nul";
 380 #endif
 381         Systemcall one;
 382         return one.startscript(Systemcall::Wait, tmp);
 383 }
 384
 385
 386 bool LaTeX::runMakeIndex(string const & f)
 387 {
 388         lyxerr[Debug::LATEX] << "idx file has been made,"
 389                 " running makeindex on file "
 390                              <<  f << endl;
 391
 392         // It should be possible to set the switches for makeindex
 393         // sorting style and such. It would also be very convenient
 394         // to be able to make style files from within LyX. This has
 395         // to come for a later time.
 396         string tmp = "makeindex -c -q ";
 397         tmp += f;
 398         Systemcall one;
 399         one.startscript(Systemcall::Wait, tmp);
 400         return true;
 401 }
 402
 403
 404 vector<Aux_Info> const
 405 LaTeX::scanAuxFiles(string const & file)
 406 {
 407         vector<Aux_Info> result;
 408
 409         result.push_back(scanAuxFile(file));
 410
 411         for (int i = 1; i < 1000; ++i) {
 412                 string file2 = ChangeExtension(file, "") + '.' + tostr(i)
 413                         + ".aux";
 414                 FileInfo fi(file2);
 415                 if (!fi.exist())
 416                         break;
 417                 result.push_back(scanAuxFile(file2));
 418         }
 419         return result;
 420 }
 421
 422
 423 Aux_Info const LaTeX::scanAuxFile(string const & file)
 424 {
 425         Aux_Info result;
 426         result.aux_file = file;
 427         scanAuxFile(file, result);
 428         return result;
 429 }
 430
 431
 432 void LaTeX::scanAuxFile(string const & file, Aux_Info & aux_info)
 433 {
 434         lyxerr[Debug::LATEX] << "Scanning aux file: " << file << endl;
 435
 436         ifstream ifs(file.c_str());
 437         string token;
 438         regex reg1("\\\\citation\\{([^}]+)\\}");
 439         regex reg2("\\\\bibdata\\{([^}]+)\\}");
 440         regex reg3("\\\\bibstyle\\{([^}]+)\\}");
 441         regex reg4("\\\\@input\\{([^}]+)\\}");
 442
 443         while (getline(ifs, token)) {
 444                 token = rtrim(token, "\r");
 445 #ifndef USE_INCLUDED_STRING
 446                 smatch sub;
 447 #else
 448                 cmatch sub;
 449 #endif
 450                 if (regex_match(STRCONV(token), sub, reg1)) {
 451                         string data = STRCONV(sub.str(1));
 452                         while (!data.empty()) {
 453                                 string citation;
 454                                 data = split(data, citation, ',');
 455                                 lyxerr[Debug::LATEX] << "Citation: "
 456                                                      << citation << endl;
 457                                 aux_info.citations.insert(citation);
 458                         }
 459                 } else if (regex_match(STRCONV(token), sub, reg2)) {
 460                         string data = sub.STRCONV(str(1));
 461                         // data is now all the bib files separated by ','
 462                         // get them one by one and pass them to the helper
 463                         while (!data.empty()) {
 464                                 string database;
 465                                 data = split(data, database, ',');
 466                                 database = ChangeExtension(database, "bib");
 467                                 lyxerr[Debug::LATEX] << "BibTeX database: `"
 468                                                      << database << '\'' << endl;
 469                                 aux_info.databases.insert(database);
 470                         }
 471                 } else if (regex_match(STRCONV(token), sub, reg3)) {
 472                         string style = STRCONV(sub.str(1));
 473                         // token is now the style file
 474                         // pass it to the helper
 475                         style = ChangeExtension(style, "bst");
 476                         lyxerr[Debug::LATEX] << "BibTeX style: `"
 477                                              << style << '\'' << endl;
 478                         aux_info.styles.insert(style);
 479                 } else if (regex_match(STRCONV(token), sub, reg4)) {
 480                         string const file2 = STRCONV(sub.str(1));
 481                         scanAuxFile(file2, aux_info);
 482                 }
 483         }
 484 }
 485
 486
 487 void LaTeX::updateBibtexDependencies(DepTable & dep,
 488                                      vector<Aux_Info> const & bibtex_info)
 489 {
 490         // Since a run of Bibtex mandates more latex runs it is ok to
 491         // remove all ".bib" and ".bst" files.
 492         dep.remove_files_with_extension(".bib");
 493         dep.remove_files_with_extension(".bst");
 494         //string aux = OnlyFilename(ChangeExtension(file, ".aux"));
 495
 496         for (vector<Aux_Info>::const_iterator it = bibtex_info.begin();
 497              it != bibtex_info.end(); ++it) {
 498                 for (set<string>::const_iterator it2 = it->databases.begin();
 499                      it2 != it->databases.end(); ++it2) {
 500                         string file = findtexfile(*it2, "bib");
 501                         if (!file.empty())
 502                                 dep.insert(file, true);
 503                 }
 504
 505                 for (set<string>::const_iterator it2 = it->styles.begin();
 506                      it2 != it->styles.end(); ++it2) {
 507                         string file = findtexfile(*it2, "bst");
 508                         if (!file.empty())
 509                                 dep.insert(file, true);
 510                 }
 511         }
 512 }
 513
 514
 515 bool LaTeX::runBibTeX(vector<Aux_Info> const & bibtex_info)
 516 {
 517         bool result = false;
 518         for (vector<Aux_Info>::const_iterator it = bibtex_info.begin();
 519              it != bibtex_info.end(); ++it) {
 520                 if (it->databases.empty())
 521                         continue;
 522                 result = true;
 523
 524                 string tmp = "bibtex ";
 525                 tmp += OnlyFilename(ChangeExtension(it->aux_file, string()));
 526                 Systemcall one;
 527                 one.startscript(Systemcall::Wait, tmp);
 528         }
 529         // Return whether bibtex was run
 530         return result;
 531 }
 532
 533
 534 int LaTeX::scanLogFile(TeXErrors & terr)
 535 {
 536         int last_line = -1;
 537         int line_count = 1;
 538         int retval = NO_ERRORS;
 539         string tmp = OnlyFilename(ChangeExtension(file, ".log"));
 540         lyxerr[Debug::LATEX] << "Log file: " << tmp << endl;
 541         ifstream ifs(tmp.c_str());
 542
 543         string token;
 544         while (getline(ifs, token)) {
 545                 lyxerr[Debug::LATEX] << "Log line: " << token << endl;
 546
 547                 if (token.empty())
 548                         continue;
 549
 550                 if (prefixIs(token, "LaTeX Warning:")) {
 551                         // Here shall we handle different
 552                         // types of warnings
 553                         retval |= LATEX_WARNING;
 554                         lyxerr[Debug::LATEX] << "LaTeX Warning." << endl;
 555                         if (contains(token, "Rerun to get cross-references")) {
 556                                 retval |= RERUN;
 557                                 lyxerr[Debug::LATEX]
 558                                         << "We should rerun." << endl;
 559                         } else if (contains(token, "Citation")
 560                                    && contains(token, "on page")
 561                                    && contains(token, "undefined")) {
 562                                 retval |= UNDEF_CIT;
 563                         }
 564                 } else if (prefixIs(token, "Package")) {
 565                         // Package warnings
 566                         retval |= PACKAGE_WARNING;
 567                         if (contains(token, "natbib Warning:")) {
 568                                 // Natbib warnings
 569                                 if (contains(token, "Citation")
 570                                     && contains(token, "on page")
 571                                     && contains(token, "undefined")) {
 572                                         retval |= UNDEF_CIT;
 573                                 }
 574                         } else if (contains(token, "run BibTeX")) {
 575                                 retval |= UNDEF_CIT;
 576                         } else if (contains(token, "Rerun LaTeX") ||
 577                                    contains(token, "Rerun to get")) {
 578                                 // at least longtable.sty and bibtopic.sty
 579                                 // might use this.
 580                                 lyxerr[Debug::LATEX]
 581                                         << "We should rerun." << endl;
 582                                 retval |= RERUN;
 583                         }
 584                 } else if (token[0] == '(') {
 585                         if (contains(token, "Rerun LaTeX") ||
 586                             contains(token, "Rerun to get")) {
 587                                 // Used by natbib
 588                                 lyxerr[Debug::LATEX]
 589                                         << "We should rerun." << endl;
 590                                 retval |= RERUN;
 591                         }
 592                 } else if (prefixIs(token, "! ")) {
 593                         // Ok, we have something that looks like a TeX Error
 594                         // but what do we really have.
 595
 596                         // Just get the error description:
 597                         string desc(token, 2);
 598                         if (contains(token, "LaTeX Error:"))
 599                                 retval |= LATEX_ERROR;
 600                         // get the next line
 601                         string tmp;
 602                         int count = 0;
 603                         do {
 604                                 if (!getline(ifs, tmp))
 605                                         break;
 606                                 if (++count > 10)
 607                                         break;
 608                         } while (!prefixIs(tmp, "l."));
 609                         if (prefixIs(tmp, "l.")) {
 610                                 // we have a latex error
 611                                 retval |=  TEX_ERROR;
 612                                 if (contains(desc, "Package babel Error: You haven't defined the language"))
 613                                         retval |= ERROR_RERUN;
 614                                 // get the line number:
 615                                 int line = 0;
 616                                 sscanf(tmp.c_str(), "l.%d", &line);
 617                                 // get the rest of the message:
 618                                 string errstr(tmp, tmp.find(' '));
 619                                 errstr += '\n';
 620                                 getline(ifs, tmp);
 621                                 while (!contains(errstr, "l.")
 622                                        && !tmp.empty()
 623                                        && !prefixIs(tmp, "! ")
 624                                        && !contains(tmp, "(job aborted")) {
 625                                         errstr += tmp;
 626                                         errstr += "\n";
 627                                         getline(ifs, tmp);
 628                                 }
 629                                 lyxerr[Debug::LATEX]
 630                                         << "line: " << line << '\n'
 631                                         << "Desc: " << desc << '\n'
 632                                         << "Text: " << errstr << endl;
 633                                 if (line == last_line)
 634                                         ++line_count;
 635                                 else {
 636                                         line_count = 1;
 637                                         last_line = line;
 638                                 }
 639                                 if (line_count <= 5) {
 640                                         terr.insertError(line, desc, errstr);
 641                                         ++num_errors;
 642                                 }
 643                         }
 644                 } else {
 645                         // information messages, TeX warnings and other
 646                         // warnings we have not caught earlier.
 647                         if (prefixIs(token, "Overfull ")) {
 648                                 retval |= TEX_WARNING;
 649                         } else if (prefixIs(token, "Underfull ")) {
 650                                 retval |= TEX_WARNING;
 651                         } else if (contains(token, "Rerun to get citations")) {
 652                                 // Natbib seems to use this.
 653                                 retval |= UNDEF_CIT;
 654                         } else if (contains(token, "No pages of output")) {
 655                                 // A dvi file was not created
 656                                 retval |= NO_OUTPUT;
 657                         } else if (contains(token, "That makes 100 errors")) {
 658                                 // More than 100 errors were reprted
 659                                 retval |= TOO_MANY_ERRORS;
 660                         }
 661                 }
 662         }
 663         lyxerr[Debug::LATEX] << "Log line: " << token << endl;
 664         return retval;
 665 }
 666
 667
 668 void LaTeX::deplog(DepTable & head)
 669 {
 670         // This function reads the LaTeX log file end extracts all the external
 671         // files used by the LaTeX run. The files are then entered into the
 672         // dependency file.
 673
 674         string const logfile = OnlyFilename(ChangeExtension(file, ".log"));
 675
 676         regex reg1("\\)* *\\(([^ )]+).*");
 677         regex reg2("File: ([^ ]+).*");
 678         regex reg3("No file ([^ ]+)\\..*");
 679         regex reg4("\\\\openout[0-9]+.*=.*`([^ ]+)'\\..*");
 680         // If an index should be created, MikTex does not write a line like
 681         //    \openout# = 'sample,idx'.
 682         // but intstead only a line like this into the log:
 683         //   Writing index file sample.idx
 684         regex reg5("Writing index file ([^ ]+).*");
 685         regex unwanted("^.*\\.(aux|log|dvi|bbl|ind|glo)$");
 686
 687         ifstream ifs(logfile.c_str());
 688         while (ifs) {
 689                 // Ok, the scanning of files here is not sufficient.
 690                 // Sometimes files are named by "File: xxx" only
 691                 // So I think we should use some regexps to find files instead.
 692                 // "(\([^ ]+\)"   should match the "(file " variant
 693                 // "File: \([^ ]+\)" should match the "File: file" variant
 694                 string foundfile;
 695                 string token;
 696                 getline(ifs, token);
 697                 token = rtrim(token, "\r");
 698                 if (token.empty()) continue;
 699
 700 #ifndef USE_INCLUDED_STRING
 701                 smatch sub;
 702 #else
 703                 cmatch sub;
 704 #endif
 705                 if (regex_match(STRCONV(token), sub, reg1)) {
 706                         foundfile = STRCONV(sub.str(1));
 707                 } else if (regex_match(STRCONV(token), sub, reg2)) {
 708                         foundfile = STRCONV(sub.str(1));
 709                 } else if (regex_match(STRCONV(token), sub, reg3)) {
 710                         foundfile = STRCONV(sub.str(1));
 711                 } else if (regex_match(STRCONV(token), sub, reg4)) {
 712                         foundfile = STRCONV(sub.str(1));
 713                 } else if (regex_match(STRCONV(token), sub, reg5)) {
 714                         foundfile = STRCONV(sub.str(1));
 715                 } else {
 716                         continue;
 717                 }
 718
 719                 // convert from native os path to unix path
 720                 foundfile = os::internal_path(foundfile);
 721
 722                 lyxerr[Debug::DEPEND] << "Found file: "
 723                                       << foundfile << endl;
 724
 725                 // Ok now we found a file.
 726                 // Now we should make sure that this is a file that we can
 727                 // access through the normal paths.
 728                 // We will not try any fancy search methods to
 729                 // find the file.
 730
 731                 // (1) foundfile is an
 732                 //     absolute path and should
 733                 //     be inserted.
 734                 if (AbsolutePath(foundfile)) {
 735                         lyxerr[Debug::DEPEND] << "AbsolutePath file: "
 736                                               << foundfile << endl;
 737                         // On initial insert we want to do the update at once
 738                         // since this file can not be a file generated by
 739                         // the latex run.
 740                         if (FileInfo(foundfile).exist())
 741                                 head.insert(foundfile, true);
 742                 }
 743
 744                 // (2) foundfile is in the tmpdir
 745                 //     insert it into head
 746                 else if (FileInfo(OnlyFilename(foundfile)).exist()) {
 747                         if (regex_match(STRCONV(foundfile), unwanted)) {
 748                                 lyxerr[Debug::DEPEND]
 749                                         << "We don't want "
 750                                         << OnlyFilename(foundfile)
 751                                         << " in the dep file"
 752                                         << endl;
 753                         } else if (suffixIs(foundfile, ".tex")) {
 754                                 // This is a tex file generated by LyX
 755                                 // and latex is not likely to change this
 756                                 // during its runs.
 757                                 lyxerr[Debug::DEPEND]
 758                                         << "Tmpdir TeX file: "
 759                                         << OnlyFilename(foundfile)
 760                                         << endl;
 761                                 head.insert(foundfile, true);
 762                         } else {
 763                                 lyxerr[Debug::DEPEND]
 764                                         << "In tmpdir file:"
 765                                         << OnlyFilename(foundfile)
 766                                         << endl;
 767                                 head.insert(OnlyFilename(foundfile));
 768                         }
 769                 } else
 770                         lyxerr[Debug::DEPEND]
 771                                 << "Not a file or we are unable to find it."
 772                                 << endl;
 773         }
 774
 775         // Make sure that the main .tex file is in the dependancy file.
 776         head.insert(OnlyFilename(file), true);
 777 }