src/LaTeX.C

   1 /* This file is part of
   2  * ======================================================
   3  *
   4  *           LyX, The Document Processor
   5  *           Copyright 1995 Matthias Ettrich
   6  *           Copyright 1995-2000 The LyX Team.
   7  *
   8  *           This file is Copyright 1996-2000
   9  *           Lars Gullik Bjønnes
  10  *
  11  * ======================================================
  12  */
  13
  14 #include <config.h>
  15
  16 #ifdef __GNUG__
  17 #pragma implementation
  18 #endif
  19 #include <fstream>
  20
  21 #include "support/filetools.h"
  22 #include "LaTeX.h"
  23 #include "support/FileInfo.h"
  24 #include "debug.h"
  25 #include "support/lyxlib.h"
  26 #include "support/syscall.h"
  27 #include "support/syscontr.h"
  28 #include "support/path.h"
  29 #include "support/LRegex.h"
  30 #include "support/LSubstring.h"
  31 #include "bufferlist.h"
  32 #include "minibuffer.h"
  33 #include "gettext.h"
  34 #include "lyx_gui_misc.h"
  35
  36 using std::ifstream;
  37 using std::getline;
  38 using std::endl;
  39
  40 // TODO: in no particular order
  41 // - get rid of the extern BufferList and the call to
  42 //   BufferList::updateIncludedTeXfiles, this should either
  43 //   be done before calling LaTeX::funcs or in a completely
  44 //   different way.
  45 // - the bibtex command options should be supported.
  46 // - the makeindex style files should be taken care of with
  47 //   the dependency mechanism.
  48 // - makeindex commandline options should be supported
  49 // - somewhere support viewing of bibtex and makeindex log files.
  50 // - we should perhaps also scan the bibtex log file
  51 // - we should perhaps also scan the bibtex log file
  52
  53 extern BufferList bufferlist;
  54
  55 /*
  56  * CLASS TEXERRORS
  57  */
  58
  59 void TeXErrors::insertError(int line, string const & error_desc,
  60                             string const & error_text)
  61 {
  62         Error newerr(line, error_desc, error_text);
  63         errors.push_back(newerr);
  64 }
  65
  66 /*
  67  * CLASS LaTeX
  68  */
  69
  70 LaTeX::LaTeX(string const & latex, string const & f, string const & p)
  71                 : cmd(latex), file(f), path(p)
  72 {
  73         num_errors = 0;
  74         depfile = file + ".dep";
  75         if (prefixIs(cmd, "pdf")) // Do we use pdflatex ?
  76                 depfile += "-pdf";
  77 }
  78
  79
  80 void LaTeX::deleteFilesOnError() const
  81 {
  82         // currently just a dummy function.
  83
  84         // What files do we have to delete?
  85
  86         // This will at least make latex do all the runs
  87         lyx::unlink(depfile);
  88
  89         // but the reason for the error might be in a generated file...
  90
  91         string ofname = OnlyFilename(file);
  92
  93         // bibtex file
  94         string bbl = ChangeExtension(ofname, ".bbl");
  95         lyx::unlink(bbl);
  96
  97         // makeindex file
  98         string ind = ChangeExtension(ofname, ".ind");
  99         lyx::unlink(ind);
 100
 101         // Also remove the aux file
 102         string aux = ChangeExtension(ofname, ".aux");
 103         lyx::unlink(aux);
 104 }
 105
 106
 107 int LaTeX::run(TeXErrors & terr, MiniBuffer * minib)
 108         // We know that this function will only be run if the lyx buffer
 109         // has been changed. We also know that a newly written .tex file
 110         // is always different from the previous one because of the date
 111         // in it. However it seems safe to run latex (at least) on time each
 112         // time the .tex file changes.
 113 {
 114         int scanres = LaTeX::NO_ERRORS;
 115         unsigned int count = 0; // number of times run
 116         num_errors = 0; // just to make sure.
 117         const unsigned int MAX_RUN = 6;
 118         DepTable head; // empty head
 119         bool rerun = false; // rerun requested
 120
 121         // The class LaTeX does not know the temp path.
 122         bufferlist.updateIncludedTeXfiles(lyx::getcwd()); //GetCWD());
 123
 124         // Never write the depfile if an error was encountered.
 125
 126         // 0
 127         // first check if the file dependencies exist:
 128         //     ->If it does exist
 129         //             check if any of the files mentioned in it have
 130         //             changed (done using a checksum).
 131         //                 -> if changed:
 132         //                        run latex once and
 133         //                        remake the dependency file
 134         //                 -> if not changed:
 135         //                        just return there is nothing to do for us.
 136         //     ->if it doesn't exist
 137         //             make it and
 138         //             run latex once (we need to run latex once anyway) and
 139         //             remake the dependency file.
 140         //
 141         FileInfo fi(depfile);
 142         bool run_bibtex = false;
 143         if (fi.exist()) {
 144                 // Read the dep file:
 145                 head.read(depfile);
 146                 // Update the checksums
 147                 head.update();
 148
 149                 lyxerr[Debug::DEPEND] << "Dependency file exists" << endl;
 150                 if (head.sumchange()) {
 151                         ++count;
 152                         lyxerr[Debug::DEPEND]
 153                                 << "Dependency file has changed" << endl;
 154                         lyxerr[Debug::LATEX]
 155                                 << "Run #" << count << endl;
 156                         WriteStatus(minib,
 157                                     string(_("LaTeX run number ")) + tostr(count));
 158                         this->operator()();
 159                         scanres = scanLogFile(terr);
 160                         if (scanres & LaTeX::ERRORS) {
 161                                 deleteFilesOnError();
 162                                 return scanres; // return on error
 163                         }
 164
 165                         run_bibtex = scanAux(head);
 166                         if (run_bibtex)
 167                                 lyxerr[Debug::DEPEND]
 168                                         << "Bibtex demands rerun" << endl;
 169                 } else {
 170                         lyxerr[Debug::DEPEND] << "return no_change" << endl;
 171                         return LaTeX::NO_CHANGE;
 172                 }
 173         } else {
 174                 ++count;
 175                 lyxerr[Debug::DEPEND]
 176                         << "Dependency file does not exist" << endl;
 177
 178                 lyxerr[Debug::LATEX]
 179                         << "Run #" << count << endl;
 180                 head.insert(file, true);
 181                 WriteStatus(minib,
 182                             string(_("LaTeX run number ")) + tostr(count));
 183                 this->operator()();
 184                 scanres = scanLogFile(terr);
 185                 if (scanres & LaTeX::ERRORS) {
 186                         deleteFilesOnError();
 187                         return scanres; // return on error
 188                 }
 189
 190         }
 191
 192         // update the dependencies.
 193         deplog(head); // reads the latex log
 194         head.update();
 195
 196         // 0.5
 197         // At this point we must run external programs if needed.
 198         // makeindex will be run if a .idx file changed or was generated.
 199         // And if there were undefined citations or changes in references
 200         // the .aux file is checked for signs of bibtex. Bibtex is then run
 201         // if needed.
 202
 203         // run makeindex
 204         if (head.haschanged(OnlyFilename(ChangeExtension(file, ".idx")))) {
 205                 // no checks for now
 206                 lyxerr[Debug::LATEX] << "Running MakeIndex." << endl;
 207                 WriteStatus(minib, _("Running MakeIndex."));
 208                 rerun = runMakeIndex(OnlyFilename(ChangeExtension(file, ".idx")));
 209         }
 210
 211         // run bibtex
 212         if (scanres & LaTeX::UNDEF_CIT
 213             || scanres & LaTeX::RERUN
 214             || run_bibtex) {
 215                 // Here we must scan the .aux file and look for
 216                 // "\bibdata" and/or "\bibstyle". If one of those
 217                 // tags is found -> run bibtex and set rerun = true;
 218                 // no checks for now
 219                 lyxerr[Debug::LATEX] << "Running BibTeX." << endl;
 220                 WriteStatus(minib, _("Running BibTeX."));
 221                 rerun = runBibTeX(head);
 222         }
 223
 224         // 1
 225         // we know on this point that latex has been run once (or we just
 226         // returned) and the question now is to decide if we need to run
 227         // it any more. This is done by asking if any of the files in the
 228         // dependency file has changed. (remember that the checksum for
 229         // a given file is reported to have changed if it just was created)
 230         //     -> if changed or rerun == true:
 231         //             run latex once more and
 232         //             update the dependency structure
 233         //     -> if not changed:
 234         //             we does nothing at this point
 235         //
 236         if (rerun || head.sumchange()) {
 237                 rerun = false;
 238                 ++count;
 239                 lyxerr[Debug::DEPEND]
 240                         << "Dep. file has changed or rerun requested" << endl;
 241                 lyxerr[Debug::LATEX]
 242                         << "Run #" << count << endl;
 243                 WriteStatus(minib,
 244                             string(_("LaTeX run number ")) + tostr(count));
 245                 this->operator()();
 246                 scanres = scanLogFile(terr);
 247                 if (scanres & LaTeX::ERRORS) {
 248                         deleteFilesOnError();
 249                         return scanres; // return on error
 250                 }
 251
 252                 // update the depedencies
 253                 deplog(head); // reads the latex log
 254                 head.update();
 255         } else {
 256                 lyxerr[Debug::DEPEND] << "Dep. file has NOT changed" << endl;
 257         }
 258
 259         // 1.5
 260         // The inclusion of files generated by external programs like
 261         // makeindex or bibtex might have done changes to pagenumbereing,
 262         // etc. And because of this we must run the external programs
 263         // again to make sure everything is redone correctly.
 264         // Also there should be no need to run the external programs any
 265         // more after this.
 266
 267         // run makeindex if the <file>.idx has changed or was generated.
 268         if (head.haschanged(OnlyFilename(ChangeExtension(file, ".idx")))) {
 269                 // no checks for now
 270                 lyxerr[Debug::LATEX] << "Running MakeIndex." << endl;
 271                 WriteStatus(minib, _("Running MakeIndex."));
 272                 rerun = runMakeIndex(OnlyFilename(ChangeExtension(file, ".idx")));
 273         }
 274
 275         // 2
 276         // we will only run latex more if the log file asks for it.
 277         // or if the sumchange() is true.
 278         //     -> rerun asked for:
 279         //             run latex and
 280         //             remake the dependency file
 281         //             goto 2 or return if max runs are reached.
 282         //     -> rerun not asked for:
 283         //             just return (fall out of bottom of func)
 284         //
 285         while ((head.sumchange() || rerun || (scanres & LaTeX::RERUN))
 286                && count < MAX_RUN) {
 287                 // Yes rerun until message goes away, or until
 288                 // MAX_RUNS are reached.
 289                 rerun = false;
 290                 ++count;
 291                 lyxerr[Debug::LATEX] << "Run #" << count << endl;
 292                 WriteStatus(minib, string(_("LaTeX run number ")) + tostr(count));
 293                 this->operator()();
 294                 scanres = scanLogFile(terr);
 295                 if (scanres & LaTeX::ERRORS) {
 296                         deleteFilesOnError();
 297                         return scanres; // return on error
 298                 }
 299
 300                 // keep this updated
 301                 head.update();
 302         }
 303
 304         // Write the dependencies to file.
 305         head.write(depfile);
 306         lyxerr[Debug::LATEX] << "Done." << endl;
 307         return scanres;
 308 }
 309
 310
 311 int LaTeX::operator()()
 312 {
 313 #ifndef __EMX__
 314         string tmp = cmd + ' ' + QuoteName(file) + " > /dev/null";
 315 #else // cmd.exe (OS/2) causes SYS0003 error at "/dev/null"
 316         string tmp = cmd + ' ' + file + " > nul";
 317 #endif
 318         Systemcalls one;
 319         return one.startscript(Systemcalls::System, tmp);
 320 }
 321
 322
 323 bool LaTeX::runMakeIndex(string const & f)
 324 {
 325         lyxerr[Debug::LATEX] << "idx file has been made,"
 326                 " running makeindex on file "
 327                              <<  f << endl;
 328
 329         // It should be possible to set the switches for makeindex
 330         // sorting style and such. It would also be very convenient
 331         // to be able to make style files from within LyX. This has
 332         // to come for a later time. (0.13 perhaps?)
 333         string tmp = "makeindex -c -q ";
 334         tmp += f;
 335         Systemcalls one;
 336         one.startscript(Systemcalls::System, tmp);
 337         return true;
 338 }
 339
 340
 341 bool LaTeX::scanAux(DepTable & dep)
 342 {
 343         // if any of the bib file has changed we don't have to
 344         // check the .aux file.
 345         if (dep.extchanged(".bib")
 346             || dep.extchanged(".bst")) return true;
 347
 348         string aux = OnlyFilename(ChangeExtension(file, ".aux"));
 349         return scanAux(aux, dep, false);
 350 }
 351
 352
 353 bool LaTeX::scanAux(string const & file, DepTable & dep, bool insert)
 354 {
 355         lyxerr[Debug::LATEX] << "Scanning aux file: " << file << endl;
 356
 357         ifstream ifs(file.c_str());
 358         string token;
 359         LRegex reg1("\\\\bibdata\\{([^}]+)\\}");
 360         LRegex reg2("\\\\bibstyle\\{([^}]+)\\}");
 361         LRegex reg3("\\\\@input\\{([^}]+)\\}");
 362         bool using_bibtex = false;
 363         while (getline(ifs, token)) {
 364                 if (reg1.exact_match(token)) {
 365                         using_bibtex = true;
 366                         LRegex::SubMatches const & sub = reg1.exec(token);
 367                         string data = LSubstring(token, sub[1].first,
 368                                                  sub[1].second);
 369                         // data is now all the bib files separated by ','
 370                         // get them one by one and pass them to the helper
 371                         while (!data.empty()) {
 372                                 string l;
 373                                 data = split(data, l, ',');
 374                                 string full_l =
 375                                         findtexfile(ChangeExtension(l, "bib"),
 376                                                     "bib");
 377                                 lyxerr[Debug::LATEX] << "Bibtex database: `"
 378                                                      << full_l << "'" << endl;
 379                                 if (!full_l.empty()) {
 380                                         if (insert)
 381                                                 // add full_l to the dep file.
 382                                                 dep.insert(full_l, true);
 383                                         else
 384                                                 if (!dep.exist(full_l))
 385                                                         return true;
 386                                 }
 387                         }
 388                 } else if (reg2.exact_match(token)) {
 389                         using_bibtex = true;
 390                         LRegex::SubMatches const & sub = reg2.exec(token);
 391                         string style = LSubstring(token, sub[1].first,
 392                                                   sub[1].second);
 393                         // token is now the style file
 394                         // pass it to the helper
 395                         string full_l =
 396                                 findtexfile(ChangeExtension(style, "bst"),
 397                                             "bst");
 398                         lyxerr[Debug::LATEX] << "Bibtex style: `"
 399                                              << full_l << "'" << endl;
 400                         if (!full_l.empty()) {
 401                                 if (insert)
 402                                         // add full_l to the dep file.
 403                                         dep.insert(full_l, true);
 404                                 else
 405                                         if (!dep.exist(full_l))
 406                                                 return true;
 407                         }
 408                 } else if (reg3.exact_match(token)) {
 409                         LRegex::SubMatches const & sub = reg3.exec(token);
 410                         string file2 = LSubstring(token, sub[1].first,
 411                                                   sub[1].second);
 412                         if (scanAux(file2, dep, insert)) {
 413                                 using_bibtex = true;
 414                                 if (!insert)
 415                                         return true;
 416                         }
 417                 }
 418         }
 419         if (insert)
 420                 return using_bibtex;
 421         else
 422                 return false;
 423 }
 424
 425
 426 bool LaTeX::runBibTeX(DepTable & dep)
 427 {
 428         // Since a run of Bibtex mandates more latex runs it is ok to
 429         // remove all ".bib" and ".bst" files, it is also required to
 430         // discover style and database changes.
 431         dep.remove_files_with_extension(".bib");
 432         dep.remove_files_with_extension(".bst");
 433         string aux = OnlyFilename(ChangeExtension(file, ".aux"));
 434         if (scanAux(aux, dep, true)) {
 435                 // run bibtex and
 436                 string tmp = "bibtex ";
 437                 tmp += OnlyFilename(ChangeExtension(file, string()));
 438                 Systemcalls one;
 439                 one.startscript(Systemcalls::System, tmp);
 440                 return true;
 441         }
 442         // bibtex was not run.
 443         return false;
 444 }
 445
 446
 447 int LaTeX::scanLogFile(TeXErrors & terr)
 448 {
 449         int last_line = -1;
 450         int line_count = 1;
 451         int retval = NO_ERRORS;
 452         string tmp = OnlyFilename(ChangeExtension(file, ".log"));
 453         lyxerr[Debug::LATEX] << "Log file: " << tmp << endl;
 454         ifstream ifs(tmp.c_str());
 455
 456         string token;
 457         while (getline(ifs, token)) {
 458                 lyxerr[Debug::LATEX] << "Log line: " << token << endl;
 459
 460                 if (token.empty())
 461                         continue;
 462
 463                 if (prefixIs(token, "LaTeX Warning:")) {
 464                         // Here shall we handle different
 465                         // types of warnings
 466                         retval |= LATEX_WARNING;
 467                         lyxerr[Debug::LATEX] << "LaTeX Warning." << endl;
 468                         if (contains(token, "Rerun to get cross-references")) {
 469                                 retval |= RERUN;
 470                                 lyxerr[Debug::LATEX]
 471                                         << "We should rerun." << endl;
 472                         } else if (contains(token, "Citation")
 473                                    && contains(token, "on page")
 474                                    && contains(token, "undefined")) {
 475                                 retval |= UNDEF_CIT;
 476                         }
 477                 } else if (prefixIs(token, "Package")) {
 478                         // Package warnings
 479                         retval |= PACKAGE_WARNING;
 480                         if (contains(token, "natbib Warning:")) {
 481                                 // Natbib warnings
 482                                 if (contains(token, "Citation")
 483                                     && contains(token, "on page")
 484                                     && contains(token, "undefined")) {
 485                                         retval |= UNDEF_CIT;
 486                                 }
 487                         } else if (contains(token, "Rerun LaTeX.")) {
 488                                 // at least longtable.sty might use this.
 489                                 retval |= RERUN;
 490                         }
 491                 } else if (prefixIs(token, "! ")) {
 492                         // Ok, we have something that looks like a TeX Error
 493                         // but what do we really have.
 494
 495                         // Just get the error description:
 496                         string desc(token, 2);
 497                         if (contains(token, "LaTeX Error:"))
 498                                 retval |= LATEX_ERROR;
 499                         // get the next line
 500                         string tmp;
 501                         int count = 0;
 502                         do {
 503                                 if (!getline(ifs, tmp))
 504                                         break;
 505                                 if (++count > 10)
 506                                         break;
 507                         } while (!prefixIs(tmp, "l."));
 508                         if (prefixIs(tmp, "l.")) {
 509                                 // we have a latex error
 510                                 retval |=  TEX_ERROR;
 511                                 // get the line number:
 512                                 int line = 0;
 513                                 sscanf(tmp.c_str(), "l.%d", &line);
 514                                 // get the rest of the message:
 515                                 string errstr(tmp, tmp.find(' '));
 516                                 errstr += '\n';
 517                                 getline(ifs, tmp);
 518                                 while (!contains(errstr, "l.")
 519                                        && !tmp.empty()
 520                                        && !prefixIs(tmp, "! ")
 521                                        && !contains(tmp, "(job aborted")) {
 522                                         errstr += tmp;
 523                                         errstr += "\n";
 524                                         getline(ifs, tmp);
 525                                 }
 526                                 lyxerr[Debug::LATEX]
 527                                         << "line: " << line << '\n'
 528                                         << "Desc: " << desc << '\n'
 529                                         << "Text: " << errstr << endl;
 530                                 if (line == last_line)
 531                                         ++line_count;
 532                                 else {
 533                                         line_count = 1;
 534                                         last_line = line;
 535                                 }
 536                                 if (line_count <= 5) {
 537                                         terr.insertError(line, desc, errstr);
 538                                         ++num_errors;
 539                                 }
 540                         }
 541                 } else {
 542                         // information messages, TeX warnings and other
 543                         // warnings we have not caught earlier.
 544                         if (prefixIs(token, "Overfull ")) {
 545                                 retval |= TEX_WARNING;
 546                         } else if (prefixIs(token, "Underfull ")) {
 547                                 retval |= TEX_WARNING;
 548                         } else if (contains(token, "Rerun to get citations")) {
 549                                 // Natbib seems to use this.
 550                                 retval |= RERUN;
 551                         } else if (contains(token, "No pages of output")) {
 552                                 // A dvi file was not created
 553                                 retval |= NO_OUTPUT;
 554                         } else if (contains(token, "That makes 100 errors")) {
 555                                 // More than 100 errors were reprted
 556                                 retval |= TOO_MANY_ERRORS;
 557                         }
 558                 }
 559         }
 560         lyxerr[Debug::LATEX] << "Log line: " << token << endl;
 561         return retval;
 562 }
 563
 564
 565 void LaTeX::deplog(DepTable & head)
 566 {
 567         // This function reads the LaTeX log file end extracts all the external
 568         // files used by the LaTeX run. The files are then entered into the
 569         // dependency file.
 570
 571         string logfile = OnlyFilename(ChangeExtension(file, ".log"));
 572
 573         LRegex reg1(")* *\\(([^ \\)]+).*");
 574         LRegex reg2("File: ([^ ]+).*");
 575         LRegex reg3("No file ([^ ]+)\\..*");
 576         LRegex reg4("\\\\openout[0-9]+.*=.*`([^ ]+)'\\..*");
 577         LRegex unwanted("^.*\\.(aux|log|dvi|bbl|ind|glo)$");
 578
 579         ifstream ifs(logfile.c_str());
 580         while (ifs) {
 581                 // Ok, the scanning of files here is not sufficient.
 582                 // Sometimes files are named by "File: xxx" only
 583                 // So I think we should use some regexps to find files instead.
 584                 // "(\([^ ]+\)"   should match the "(file " variant
 585                 // "File: \([^ ]+\)" should match the "File: file" variant
 586                 string foundfile;
 587                 string token;
 588                 getline(ifs, token);
 589                 if (token.empty()) continue;
 590
 591                 if (reg1.exact_match(token)) {
 592                         LRegex::SubMatches const & sub = reg1.exec(token);
 593                         foundfile = LSubstring(token, sub[1].first,
 594                                                sub[1].second);
 595                 } else if (reg2.exact_match(token)) {
 596                         LRegex::SubMatches const & sub = reg2.exec(token);
 597                         foundfile = LSubstring(token, sub[1].first,
 598                                                sub[1].second);
 599                 } else if (reg3.exact_match(token)) {
 600                         LRegex::SubMatches const & sub = reg3.exec(token);
 601                         foundfile = LSubstring(token, sub[1].first,
 602                                                sub[1].second);
 603                 } else if (reg4.exact_match(token)) {
 604                         LRegex::SubMatches const & sub = reg4.exec(token);
 605                         foundfile = LSubstring(token, sub[1].first,
 606                                                sub[1].second);
 607                 } else {
 608                         continue;
 609                 }
 610
 611                 lyxerr[Debug::DEPEND] << "Found file: "
 612                                       << foundfile << endl;
 613
 614                 // Ok now we found a file.
 615                 // Now we should make sure that this is a file that we can
 616                 // access through the normal paths.
 617                 // We will not try any fancy search methods to
 618                 // find the file.
 619
 620                 // (1) foundfile is an
 621                 //     absolute path and should
 622                 //     be inserted.
 623                 if (AbsolutePath(foundfile)) {
 624                         lyxerr[Debug::DEPEND] << "AbsolutePath file: "
 625                                               << foundfile << endl;
 626                         // On initial insert we want to do the update at once
 627                         // since this file can not be a file generated by
 628                         // the latex run.
 629                         head.insert(foundfile, true);
 630                         continue;
 631                 }
 632
 633                 // (2) foundfile is in the tmpdir
 634                 //     insert it into head
 635                 if (FileInfo(OnlyFilename(foundfile)).exist()) {
 636                         if (unwanted.exact_match(foundfile)) {
 637                                 lyxerr[Debug::DEPEND]
 638                                         << "We don't want "
 639                                         << OnlyFilename(foundfile)
 640                                         << " in the dep file"
 641                                         << endl;
 642                         } else if (suffixIs(foundfile, ".tex")) {
 643                                 // This is a tex file generated by LyX
 644                                 // and latex is not likely to change this
 645                                 // during its runs.
 646                                 lyxerr[Debug::DEPEND]
 647                                         << "Tmpdir TeX file: "
 648                                         << OnlyFilename(foundfile)
 649                                         << endl;
 650                                 head.insert(foundfile, true);
 651                         } else {
 652                                 lyxerr[Debug::DEPEND]
 653                                         << "In tmpdir file:"
 654                                         << OnlyFilename(foundfile)
 655                                         << endl;
 656                                 head.insert(OnlyFilename(foundfile));
 657                         }
 658                         continue;
 659                 }
 660                 lyxerr[Debug::DEPEND]
 661                         << "Not a file or we are unable to find it."
 662                         << endl;
 663         }
 664 }