src/LaTeX.C

   1 /* This file is part of
   2  * ======================================================
   3  *
   4  *           LyX, The Document Processor
   5  *           Copyright 1995 Matthias Ettrich
   6  *           Copyright 1995-1999 The LyX Team.
   7  *
   8  *           This file is Copyright 1996-1999
   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
  35 using std::ifstream;
  36
  37 // TODO: in no particular order
  38 // - get rid of the extern BufferList and the call to
  39 //   BufferList::updateIncludedTeXfiles, this should either
  40 //   be done before calling LaTeX::funcs or in a completely
  41 //   different way.
  42 // - the bibtex command options should be supported.
  43 // - the makeindex style files should be taken care of with
  44 //   the dependency mechanism.
  45 // - makeindex commandline options should be supported
  46 // - somewhere support viewing of bibtex and makeindex log files.
  47 // - we should perhaps also scan the bibtex log file
  48 // - we should perhaps also scan the bibtex log file
  49
  50 extern BufferList bufferlist;
  51
  52 struct texfile_struct {
  53         LaTeX::TEX_FILES file;
  54         char const *extension;
  55 };
  56
  57 static
  58 const texfile_struct all_files[] = {
  59         { LaTeX::AUX, ".aux"},
  60         { LaTeX::BBL, ".bbl"},
  61         { LaTeX::DVI, ".dvi"},
  62         { LaTeX::GLO, ".glo"},
  63         { LaTeX::IDX, ".idx"},
  64         { LaTeX::IND, ".ind"},
  65         { LaTeX::LOF, ".lof"},
  66         { LaTeX::LOA, ".loa"},
  67         { LaTeX::LOG, ".log"},
  68         { LaTeX::LOT, ".lot"},
  69         { LaTeX::TOC, ".toc"},
  70         { LaTeX::LTX, ".ltx"},
  71         { LaTeX::TEX, ".tex"}
  72 };
  73
  74
  75 /*
  76  * CLASS TEXERRORS
  77  */
  78
  79 void TeXErrors::insertError(int line, string const & error_desc,
  80                             string const & error_text)
  81 {
  82         Error newerr(line, error_desc, error_text);
  83         errors.push_back(newerr);
  84 }
  85
  86 /*
  87  * CLASS LaTeX
  88  */
  89
  90 LaTeX::LaTeX(string const & latex, string const & f, string const & p)
  91                 : cmd(latex), file(f), path(p)
  92 {
  93         tex_files = NO_FILES;
  94         file_count = sizeof(all_files) / sizeof(texfile_struct);
  95         num_errors = 0;
  96         depfile = file + ".dep";
  97 }
  98
  99
 100 int LaTeX::run(TeXErrors & terr, MiniBuffer * minib)
 101         // We know that this function will only be run if the lyx buffer
 102         // has been changed. We also know that a newly written .tex file
 103         // is always different from the previous one because of the date
 104         // in it. However it seems safe to run latex (at least) on time each
 105         // time the .tex file changes.
 106 {
 107         int scanres = LaTeX::NO_ERRORS;
 108         unsigned int count = 0; // number of times run
 109         num_errors = 0; // just to make sure.
 110         const unsigned int MAX_RUN = 6;
 111         DepTable head; // empty head
 112         bool rerun = false; // rerun requested
 113
 114         // The class LaTeX does not know the temp path.
 115         bufferlist.updateIncludedTeXfiles(GetCWD());
 116
 117         // Never write the depfile if an error was encountered.
 118
 119         // 0
 120         // first check if the file dependencies exist:
 121         //     ->If it does exist
 122         //             check if any of the files mentioned in it have
 123         //             changed (done using a checksum).
 124         //                 -> if changed:
 125         //                        run latex once and
 126         //                        remake the dependency file
 127         //                 -> if not changed:
 128         //                        just return there is nothing to do for us.
 129         //     ->if it doesn't exist
 130         //             make it and
 131         //             run latex once (we need to run latex once anyway) and
 132         //             remake the dependency file.
 133         //
 134         FileInfo fi(depfile);
 135         bool run_bibtex = false;
 136         if (fi.exist()) {
 137                 // Read the dep file:
 138                 head.read(depfile);
 139                 // Update the checksums
 140                 head.update();
 141
 142                 lyxerr[Debug::LATEX] << "Dependency file exists" << endl;
 143                 if (head.sumchange()) {
 144                         ++count;
 145                         lyxerr[Debug::LATEX]
 146                                 << "Dependency file has changed\n"
 147                                 << "Run #" << count << endl;
 148                         minib->Set(string(_("LaTeX run number ")) + tostr(count));
 149                         minib->Store();
 150                         this->operator()();
 151                         scanres = scanLogFile(terr);
 152                         if (scanres & LaTeX::ERRORS) return scanres; // return on error
 153                         run_bibtex = scanAux(head);
 154                         if (run_bibtex)
 155                                 lyxerr << "Bibtex demands rerun" << endl;
 156                 } else {
 157                         lyxerr[Debug::LATEX] << "return no_change" << endl;
 158                         return LaTeX::NO_CHANGE;
 159                 }
 160         } else {
 161                 ++count;
 162                 lyxerr[Debug::LATEX] << "Dependency file does not exist\n"
 163                                      << "Run #" << count << endl;
 164                 head.insert(file, true);
 165                 minib->Set(string(_("LaTeX run number ")) + tostr(count));
 166                 minib->Store();
 167                 this->operator()();
 168                 scanres = scanLogFile(terr);
 169                 if (scanres & LaTeX::ERRORS) return scanres; // return on error
 170         }
 171
 172         // update the dependencies.
 173         deplog(head); // reads the latex log
 174         deptex(head); // checks for latex files
 175         head.update();
 176
 177         // 0.5
 178         // At this point we must run external programs if needed.
 179         // makeindex will be run if a .idx file changed or was generated.
 180         // And if there were undefined citations or changes in references
 181         // the .aux file is checked for signs of bibtex. Bibtex is then run
 182         // if needed.
 183
 184         // run makeindex
 185         if (head.haschanged(ChangeExtension(file, ".idx", true))) {
 186                 // no checks for now
 187                 lyxerr[Debug::LATEX] << "Running MakeIndex." << endl;
 188                 minib->Set(_("Running MakeIndex."));
 189                 minib->Store();
 190                 rerun = runMakeIndex(ChangeExtension(file, ".idx", true));
 191         }
 192
 193         // run bibtex
 194         if (scanres & LaTeX::UNDEF_CIT
 195             || scanres & LaTeX::RERUN
 196             || run_bibtex) {
 197                 // Here we must scan the .aux file and look for
 198                 // "\bibdata" and/or "\bibstyle". If one of those
 199                 // tags is found -> run bibtex and set rerun = true;
 200                 // no checks for now
 201                 lyxerr[Debug::LATEX] << "Running BibTeX." << endl;
 202                 minib->Set(_("Running BibTeX."));
 203                 minib->Store();
 204                 rerun = runBibTeX(ChangeExtension(file, ".aux", true), head);
 205         }
 206
 207         // 1
 208         // we know on this point that latex has been run once (or we just
 209         // returned) and the question now is to decide if we need to run
 210         // it any more. This is done by asking if any of the files in the
 211         // dependency file has changed. (remember that the checksum for
 212         // a given file is reported to have changed if it just was created)
 213         //     -> if changed or rerun == true:
 214         //             run latex once more and
 215         //             update the dependency structure
 216         //     -> if not changed:
 217         //             we does nothing at this point
 218         //
 219         if (rerun || head.sumchange()) {
 220                 rerun = false;
 221                 ++count;
 222                 lyxerr[Debug::LATEX]
 223                         << "Dep. file has changed or rerun requested\n"
 224                         << "Run #" << count << endl;
 225                 minib->Set(string(_("LaTeX run number ")) + tostr(count));
 226                 minib->Store();
 227                 this->operator()();
 228                 scanres = scanLogFile(terr);
 229                 if (scanres & LaTeX::ERRORS) return scanres; // return on error
 230                 // update the depedencies
 231                 deplog(head); // reads the latex log
 232                 head.update();
 233         } else {
 234                 lyxerr[Debug::LATEX] << "Dep. file has NOT changed" << endl;
 235         }
 236
 237         // 1.5
 238         // The inclusion of files generated by external programs like
 239         // makeindex or bibtex might have done changes to pagenumbereing,
 240         // etc. And because of this we must run the external programs
 241         // again to make sure everything is redone correctly.
 242         // Also there should be no need to run the external programs any
 243         // more after this.
 244
 245         // run makeindex if the <file>.idx has changed or was generated.
 246         if (head.haschanged(ChangeExtension(file, ".idx", true))) {
 247                 // no checks for now
 248                 lyxerr[Debug::LATEX] << "Running MakeIndex." << endl;
 249                 minib->Set(_("Running MakeIndex."));
 250                 minib->Store();
 251                 rerun = runMakeIndex(ChangeExtension(file, ".idx", true));
 252         }
 253
 254         // 2
 255         // we will only run latex more if the log file asks for it.
 256         // or if the sumchange() is true.
 257         //     -> rerun asked for:
 258         //             run latex and
 259         //             remake the dependency file
 260         //             goto 2 or return if max runs are reached.
 261         //     -> rerun not asked for:
 262         //             just return (fall out of bottom of func)
 263         //
 264         while ((head.sumchange() || rerun || (scanres & LaTeX::RERUN))
 265                && count < MAX_RUN) {
 266                 // Yes rerun until message goes away, or until
 267                 // MAX_RUNS are reached.
 268                 rerun = false;
 269                 ++count;
 270                 lyxerr[Debug::LATEX] << "Run #" << count << endl;
 271                 minib->Set(string(_("LaTeX run number ")) + tostr(count));
 272                 minib->Store();
 273                 this->operator()();
 274                 scanres = scanLogFile(terr);
 275                 if (scanres & LaTeX::ERRORS) return scanres; // return on error
 276                 // keep this updated
 277                 head.update();
 278         }
 279
 280         // Write the dependencies to file.
 281         head.write(depfile);
 282         lyxerr[Debug::LATEX] << "Done." << endl;
 283         return scanres;
 284 }
 285
 286
 287 int LaTeX::operator()()
 288 {
 289 #ifndef __EMX__
 290         string tmp = cmd + ' ' + file + " > /dev/null";
 291 #else // cmd.exe (OS/2) causes SYS0003 error at "/dev/null"
 292         string tmp = cmd + ' ' + file + " > nul";
 293 #endif
 294         Systemcalls one;
 295         return one.startscript(Systemcalls::System, tmp);
 296 }
 297
 298
 299 bool LaTeX::runMakeIndex(string const & f)
 300 {
 301         lyxerr[Debug::LATEX] << "idx file has been made,"
 302                 " running makeindex on file "
 303                              <<  f << endl;
 304
 305         // It should be possible to set the switches for makeindex
 306         // sorting style and such. It would also be very convenient
 307         // to be able to make style files from within LyX. This has
 308         // to come for a later time. (0.13 perhaps?)
 309         string tmp = "makeindex -c -q ";
 310         tmp += f;
 311         Systemcalls one;
 312         one.startscript(Systemcalls::System, tmp);
 313         return true;
 314 }
 315
 316
 317 bool LaTeX::scanAux(DepTable & dep)
 318 {
 319         // if any of the bib file has changed we don't have to
 320         // check the .aux file.
 321         if (dep.extchanged(".bib")
 322             || dep.extchanged(".bst")) return true;
 323
 324         string aux = ChangeExtension(file, ".aux", true);
 325         ifstream ifs(aux.c_str());
 326         string token;
 327         LRegex reg1("\\\\bibdata\\{([^}]+)\\}");
 328         LRegex reg2("\\\\bibstyle\\{([^}]+)\\}");
 329         while (getline(ifs, token)) {
 330                 if (reg1.exact_match(token)) {
 331                         LRegex::SubMatches sub = reg1.exec(token);
 332                         string data = LSubstring(token, sub[1].first,
 333                                                  sub[1].second);
 334                         string::size_type b;
 335                         do {
 336                                 b = data.find_first_of(',', 0);
 337                                 string l;
 338                                 if (b == string::npos)
 339                                         l = data;
 340                                 else {
 341                                         l = data.substr( 0, b - 0);
 342                                         data.erase(0, b + 1);
 343                                 }
 344                                 string full_l =
 345                                         findtexfile(
 346                                                 ChangeExtension(l, "bib", false), "bib");
 347                                 if (!full_l.empty()) {
 348                                         if (!dep.exist(full_l))
 349                                                 return true;
 350                                 }
 351                         } while (b != string::npos);
 352                 } else if (reg2.exact_match(token)) {
 353                         LRegex::SubMatches sub = reg2.exec(token);
 354                         string style = LSubstring(token, sub[1].first,
 355                                                   sub[1].second);
 356                         // token is now the style file
 357                         // pass it to the helper
 358                         string full_l =
 359                                 findtexfile(
 360                                         ChangeExtension(style, "bst", false),
 361                                         "bst");
 362                         if (!full_l.empty()) {
 363                                 if (!dep.exist(full_l))
 364                                         return true;
 365                         }
 366                 }
 367         }
 368         return false;
 369 }
 370
 371
 372 bool LaTeX::runBibTeX(string const & f, DepTable & dep)
 373 {
 374         // Since a run of Bibtex mandates more latex runs it is ok to
 375         // remove all ".bib" and ".bst" files, it is also required to
 376         // discover style and database changes.
 377         dep.remove_files_with_extension(".bib");
 378         dep.remove_files_with_extension(".bst");
 379         ifstream ifs(f.c_str());
 380         string token;
 381         bool using_bibtex = false;
 382         LRegex reg1("\\\\bibdata\\{([^}]+)\\}");
 383         LRegex reg2("\\\\bibstyle\\{([^}]+)\\}");
 384         while (getline(ifs, token)) {
 385                 if (reg1.exact_match(token)) {
 386                         using_bibtex = true;
 387                         LRegex::SubMatches const & sub = reg1.exec(token);
 388                         string data = LSubstring(token, sub[1].first,
 389                                                  sub[1].second);
 390                         // data is now all the bib files separated by ','
 391                         // get them one by one and pass them to the helper
 392                         string::size_type b;
 393                         do {
 394                                 b = data.find_first_of(',', 0);
 395                                 string l;
 396                                 if (b == string::npos)
 397                                         l = data;
 398                                 else {
 399                                         l = data.substr(0, b - 0);
 400                                         data.erase(0, b + 1);
 401                                 }
 402                                 string full_l =
 403                                         findtexfile(
 404                                                 ChangeExtension(l, "bib", false),
 405                                                 "bib");
 406                                 lyxerr[Debug::LATEX] << "Bibtex database: `"
 407                                                      << full_l << "'" << endl;
 408                                 if (!full_l.empty()) {
 409                                         // add full_l to the dep file.
 410                                         dep.insert(full_l, true);
 411                                 }
 412                         } while (b != string::npos);
 413                 } else if (reg2.exact_match(token)) {
 414                         using_bibtex = true;
 415                         LRegex::SubMatches const & sub = reg2.exec(token);
 416                         string style = LSubstring(token, sub[1].first,
 417                                                   sub[1].second);
 418                         // token is now the style file
 419                         // pass it to the helper
 420                         string full_l =
 421                                 findtexfile(
 422                                         ChangeExtension(style, "bst", false),
 423                                         "bst");
 424                         lyxerr[Debug::LATEX] << "Bibtex style: `"
 425                                              << full_l << "'" << endl;
 426                         if (!full_l.empty()) {
 427                                 // add full_l to the dep file.
 428                                 dep.insert(full_l, true);
 429                         }
 430                 }
 431         }
 432         if (using_bibtex) {
 433                 // run bibtex and
 434                 string tmp = "bibtex ";
 435                 tmp += ChangeExtension(file, string(), true);
 436                 Systemcalls one;
 437                 one.startscript(Systemcalls::System, tmp);
 438                 return true;
 439         }
 440         // bibtex was not run.
 441         return false;
 442 }
 443
 444
 445 int LaTeX::scanLogFile(TeXErrors & terr)
 446 {
 447         int retval = NO_ERRORS;
 448         string tmp = ChangeExtension(file, ".log", true);
 449         lyxerr[Debug::LATEX] << "Log file: " << tmp << endl;
 450         ifstream ifs(tmp.c_str());
 451
 452         string token;
 453         while (getline(ifs, token)) {
 454                 lyxerr[Debug::LATEX] << "Log line: " << token << endl;
 455
 456                 if (token.empty())
 457                         continue;
 458
 459                 if (prefixIs(token, "LaTeX Warning:")) {
 460                         // Here shall we handle different
 461                         // types of warnings
 462                         retval |= LATEX_WARNING;
 463                         lyxerr[Debug::LATEX] << "LaTeX Warning." << endl;
 464                         if (contains(token, "Rerun to get cross-references")) {
 465                                 retval |= RERUN;
 466                                 lyxerr[Debug::LATEX]
 467                                         << "We should rerun." << endl;
 468                         } else if (contains(token, "Citation")
 469                                    && contains(token, "on page")
 470                                    && contains(token, "undefined")) {
 471                                 retval |= UNDEF_CIT;
 472                         }
 473                 } else if (prefixIs(token, "Package")) {
 474                         // Package warnings
 475                         retval |= PACKAGE_WARNING;
 476                         if (contains(token, "natbib Warning:")) {
 477                                 // Natbib warnings
 478                                 if (contains(token, "Citation")
 479                                     && contains(token, "on page")
 480                                     && contains(token, "undefined")) {
 481                                         retval |= UNDEF_CIT;
 482                                 }
 483                         } else if (contains(token, "Rerun LaTeX.")) {
 484                                 // at least longtable.sty might use this.
 485                                 retval |= RERUN;
 486                         }
 487                 } else if (prefixIs(token, "! ")) {
 488                         // Ok, we have something that looks like a TeX Error
 489                         // but what do we really have.
 490
 491                         // Just get the error description:
 492                         string desc(token, 2);
 493                         if (contains(token, "LaTeX Error:"))
 494                                 retval |= LATEX_ERROR;
 495                         // get the next line
 496                         string tmp;
 497                         getline(ifs, tmp);
 498                         if (prefixIs(tmp, "l.")) {
 499                                 // we have a latex error
 500                                 retval |=  TEX_ERROR;
 501                                 // get the line number:
 502                                 int line = 0;
 503                                 sscanf(tmp.c_str(), "l.%d", &line);
 504                                 // get the rest of the message:
 505                                 string errstr(tmp, tmp.find(' '));
 506                                 errstr += '\n';
 507                                 getline(ifs, tmp);
 508                                 while (!contains(errstr, "l.")
 509                                        && !tmp.empty()
 510                                        && !prefixIs(tmp, "! ")
 511                                        && !contains(tmp, "(job aborted")) {
 512                                         errstr += tmp;
 513                                         errstr += "\n";
 514                                         getline(ifs, tmp);
 515                                 }
 516                                 lyxerr[Debug::LATEX]
 517                                         << "line: " << line << '\n'
 518                                         << "Desc: " << desc << '\n'
 519                                         << "Text: " << errstr << endl;
 520                                 terr.insertError(line, desc, errstr);
 521                                 ++num_errors;
 522                         }
 523                 } else {
 524                         // information messages, TeX warnings and other
 525                         // warnings we have not caught earlier.
 526                         if (prefixIs(token, "Overfull ")) {
 527                                 retval |= TEX_WARNING;
 528                         } else if (prefixIs(token, "Underfull ")) {
 529                                 retval |= TEX_WARNING;
 530                         } else if (contains(token, "Rerun to get citations")) {
 531                                 // Natbib seems to use this.
 532                                 retval |= RERUN;
 533                         } else if (contains(token, "No pages of output")) {
 534                                 // A dvi file was not created
 535                                 retval |= NO_OUTPUT;
 536                         } else if (contains(token, "That makes 100 errors")) {
 537                                 // More than 100 errors were reprted
 538                                 retval |= TOO_MANY_ERRORS;
 539                         }
 540                 }
 541         }
 542         lyxerr[Debug::LATEX] << "Log line: " << token << endl;
 543         return retval;
 544 }
 545
 546
 547 void LaTeX::deplog(DepTable & head)
 548 {
 549         // This function reads the LaTeX log file end extracts all the external
 550         // files used by the LaTeX run. The files are then entered into the
 551         // dependency file.
 552
 553         string logfile = ChangeExtension(file, ".log", true);
 554
 555         ifstream ifs(logfile.c_str());
 556         while (ifs) {
 557                 // Now we read chars until we find a '('
 558                 char c = 0;
 559                 while(ifs.get(c)) {
 560                         if (c == '(') break;
 561                 };
 562                 if (!ifs) break;
 563
 564                 // We now have c == '(', we now read the the sequence of
 565                 // chars until reaching EOL, ' ' or ')' and put that
 566                 // into a string.
 567                 string foundfile;
 568                 while (ifs.get(c)) {
 569                         if (c == '\n' || c == ' ' || c == ')')
 570                                 break;
 571                         foundfile += c;
 572                 }
 573                 lyxerr[Debug::LATEX] << "Found file: "
 574                                      << foundfile << endl;
 575
 576                 // Ok now we found a file.
 577                 // Now we should make sure that
 578                 // this is a file that we can
 579                 // access through the normal
 580                 // paths:
 581                 // (1) foundfile is an
 582                 //     absolute path and should
 583                 //     be inserted.
 584                 if (AbsolutePath(foundfile)) {
 585                         lyxerr[Debug::LATEX] << "AbsolutePath file: "
 586                                              << foundfile << endl;
 587                         // On inital insert we want to do the update at once
 588                         // since this file can not be a file generated by
 589                         // the latex run.
 590                         head.insert(foundfile, true);
 591                         continue;
 592                 }
 593
 594                 // (2) foundfile is in the tmpdir
 595                 //     insert it into head
 596                 if (FileInfo(OnlyFilename(foundfile)).exist()) {
 597                         if (suffixIs(foundfile, ".aux")) {
 598                                 lyxerr[Debug::LATEX] << "We don't want "
 599                                                      << OnlyFilename(foundfile)
 600                                                      << " in the dep file"
 601                                                      << endl;
 602                         } else if (suffixIs(foundfile, ".tex")) {
 603                                 // This is a tex file generated by LyX
 604                                 // and latex is not likely to change this
 605                                 // during its runs.
 606                                 lyxerr[Debug::LATEX] << "Tmpdir TeX file: "
 607                                                      << OnlyFilename(foundfile)
 608                                                      << endl;
 609                                 head.insert(foundfile, true);
 610                         } else {
 611                                 lyxerr[Debug::LATEX] << "In tmpdir file:"
 612                                                      << OnlyFilename(foundfile)
 613                                                      << endl;
 614                                 head.insert(OnlyFilename(foundfile));
 615                         }
 616                         continue;
 617                 }
 618                 lyxerr[Debug::LATEX]
 619                         << "Not a file or we are unable to find it."
 620                         << endl;
 621         }
 622 }
 623
 624
 625 void LaTeX::deptex(DepTable & head)
 626 {
 627         int except = AUX|LOG|DVI|BBL|IND|GLO;
 628         string tmp;
 629         FileInfo fi;
 630         for (int i = 0; i < file_count; ++i) {
 631                 if (!(all_files[i].file & except)) {
 632                         tmp = ChangeExtension(file,
 633                                               all_files[i].extension,
 634                                               true);
 635                         lyxerr[Debug::LATEX] << "deptex: " << tmp << endl;
 636                         if (fi.newFile(tmp).exist())
 637                                 head.insert(tmp);
 638                 }
 639         }
 640 }
 641