apt-pkg/pkgcachegen.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: pkgcachegen.cc,v 1.24 1998/12/07 07:26:21 jgg Exp $
   4 /* ######################################################################
   5
   6    Package Cache Generator - Generator for the cache structure.
   7
   8    This builds the cache structure from the abstract package list parser.
   9
  10    ##################################################################### */
  11                                                                         /*}}}*/
  12 // Include Files                                                        /*{{{*/
  13 #ifdef __GNUG__
  14 #pragma implementation "apt-pkg/pkgcachegen.h"
  15 #endif
  16
  17 #include <apt-pkg/pkgcachegen.h>
  18 #include <apt-pkg/error.h>
  19 #include <apt-pkg/version.h>
  20 #include <apt-pkg/progress.h>
  21 #include <apt-pkg/sourcelist.h>
  22 #include <apt-pkg/configuration.h>
  23 #include <apt-pkg/deblistparser.h>
  24
  25 #include <strutl.h>
  26
  27 #include <sys/stat.h>
  28 #include <unistd.h>
  29                                                                         /*}}}*/
  30
  31 // CacheGenerator::pkgCacheGenerator - Constructor                      /*{{{*/
  32 // ---------------------------------------------------------------------
  33 /* We set the diry flag and make sure that is written to the disk */
  34 pkgCacheGenerator::pkgCacheGenerator(DynamicMMap &Map,OpProgress &Prog) :
  35                     Map(Map), Cache(Map), Progress(Prog)
  36 {
  37    if (_error->PendingError() == true)
  38       return;
  39
  40    if (Map.Size() == 0)
  41    {
  42       Map.RawAllocate(sizeof(pkgCache::Header));
  43       *Cache.HeaderP = pkgCache::Header();
  44    }
  45    Cache.HeaderP->Dirty = true;
  46    Map.Sync(0,sizeof(pkgCache::Header));
  47    Map.UsePools(*Cache.HeaderP->Pools,sizeof(Cache.HeaderP->Pools)/sizeof(Cache.HeaderP->Pools[0]));
  48 }
  49                                                                         /*}}}*/
  50 // CacheGenerator::~pkgCacheGenerator - Destructor                      /*{{{*/
  51 // ---------------------------------------------------------------------
  52 /* We sync the data then unset the dirty flag in two steps so as to
  53    advoid a problem during a crash */
  54 pkgCacheGenerator::~pkgCacheGenerator()
  55 {
  56    if (_error->PendingError() == true)
  57       return;
  58    if (Map.Sync() == false)
  59       return;
  60
  61    Cache.HeaderP->Dirty = false;
  62    Map.Sync(0,sizeof(pkgCache::Header));
  63 }
  64                                                                         /*}}}*/
  65 // CacheGenerator::MergeList - Merge the package list                   /*{{{*/
  66 // ---------------------------------------------------------------------
  67 /* This provides the generation of the entries in the cache. Each loop
  68    goes through a single package record from the underlying parse engine. */
  69 bool pkgCacheGenerator::MergeList(ListParser &List)
  70 {
  71    List.Owner = this;
  72
  73    int Counter = 0;
  74    while (List.Step() == true)
  75    {
  76       // Get a pointer to the package structure
  77       string PackageName = List.Package();
  78       pkgCache::PkgIterator Pkg;
  79       if (NewPackage(Pkg,PackageName) == false)
  80          return _error->Error("Error occured while processing %s (NewPackage)",PackageName.c_str());
  81       Counter++;
  82       if (Counter % 100 == 0)
  83          Progress.Progress(List.Offset());
  84
  85       /* Get a pointer to the version structure. We know the list is sorted
  86          so we use that fact in the search. Insertion of new versions is
  87          done with correct sorting */
  88       string Version = List.Version();
  89       if (Version.empty() == true)
  90       {
  91          if (List.UsePackage(Pkg,pkgCache::VerIterator(Cache)) == false)
  92             return _error->Error("Error occured while processing %s (UsePackage1)",PackageName.c_str());
  93          continue;
  94       }
  95
  96       pkgCache::VerIterator Ver = Pkg.VersionList();
  97       __apt_ptrloc *Last = &Pkg->VersionList;
  98       int Res = 1;
  99       for (; Ver.end() == false; Last = &Ver->NextVer, Ver++)
 100       {
 101          Res = pkgVersionCompare(Version.begin(),Version.end(),Ver.VerStr(),
 102                                  Ver.VerStr() + strlen(Ver.VerStr()));
 103          if (Res >= 0)
 104             break;
 105       }
 106
 107       /* We already have a version for this item, record that we
 108          saw it */
 109       if (Res == 0)
 110       {
 111          if (List.UsePackage(Pkg,Ver) == false)
 112             return _error->Error("Error occured while processing %s (UsePackage2)",PackageName.c_str());
 113
 114          if (NewFileVer(Ver,List) == false)
 115             return _error->Error("Error occured while processing %s (NewFileVer1)",PackageName.c_str());
 116
 117          continue;
 118       }
 119
 120       // Add a new version
 121       *Last = NewVersion(Ver,Version,*Last);
 122       Ver->ParentPkg = Pkg.Index();
 123       if (List.NewVersion(Ver) == false)
 124          return _error->Error("Error occured while processing %s (NewVersion1)",PackageName.c_str());
 125
 126       if (List.UsePackage(Pkg,Ver) == false)
 127          return _error->Error("Error occured while processing %s (UsePackage3)",PackageName.c_str());
 128
 129       if (NewFileVer(Ver,List) == false)
 130          return _error->Error("Error occured while processing %s (NewVersion2)",PackageName.c_str());
 131    }
 132
 133    return true;
 134 }
 135                                                                         /*}}}*/
 136 // CacheGenerator::NewPackage - Add a new package                       /*{{{*/
 137 // ---------------------------------------------------------------------
 138 /* This creates a new package structure and adds it to the hash table */
 139 bool pkgCacheGenerator::NewPackage(pkgCache::PkgIterator &Pkg,string Name)
 140 {
 141    Pkg = Cache.FindPkg(Name);
 142    if (Pkg.end() == false)
 143       return true;
 144
 145    // Get a structure
 146    unsigned long Package = Map.Allocate(sizeof(pkgCache::Package));
 147    if (Package == 0)
 148       return false;
 149
 150    Pkg = pkgCache::PkgIterator(Cache,Cache.PkgP + Package);
 151
 152    // Insert it into the hash table
 153    unsigned long Hash = Cache.Hash(Name);
 154    Pkg->NextPackage = Cache.HeaderP->HashTable[Hash];
 155    Cache.HeaderP->HashTable[Hash] = Package;
 156
 157    // Set the name and the ID
 158    Pkg->Name = Map.WriteString(Name);
 159    if (Pkg->Name == 0)
 160       return false;
 161    Pkg->ID = Cache.HeaderP->PackageCount++;
 162
 163    return true;
 164 }
 165                                                                         /*}}}*/
 166 // CacheGenerator::NewFileVer - Create a new File<->Version association /*{{{*/
 167 // ---------------------------------------------------------------------
 168 /* */
 169 bool pkgCacheGenerator::NewFileVer(pkgCache::VerIterator &Ver,
 170                                    ListParser &List)
 171 {
 172    // Get a structure
 173    unsigned long VerFile = Map.Allocate(sizeof(pkgCache::VerFile));
 174    if (VerFile == 0)
 175       return 0;
 176
 177    pkgCache::VerFileIterator VF(Cache,Cache.VerFileP + VerFile);
 178    VF->File = CurrentFile - Cache.PkgFileP;
 179
 180    // Link it to the end of the list
 181    __apt_ptrloc *Last = &Ver->FileList;
 182    for (pkgCache::VerFileIterator V = Ver.FileList(); V.end() == false; V++)
 183       Last = &V->NextFile;
 184    VF->NextFile = *Last;
 185    *Last = VF.Index();
 186
 187    VF->Offset = List.Offset();
 188    VF->Size = List.Size();
 189    if (Cache.HeaderP->MaxVerFileSize < VF->Size)
 190       Cache.HeaderP->MaxVerFileSize = VF->Size;
 191    return true;
 192 }
 193                                                                         /*}}}*/
 194 // CacheGenerator::NewVersion - Create a new Version                    /*{{{*/
 195 // ---------------------------------------------------------------------
 196 /* This puts a version structure in the linked list */
 197 unsigned long pkgCacheGenerator::NewVersion(pkgCache::VerIterator &Ver,
 198                                             string VerStr,
 199                                             unsigned long Next)
 200 {
 201    // Get a structure
 202    unsigned long Version = Map.Allocate(sizeof(pkgCache::Version));
 203    if (Version == 0)
 204       return 0;
 205
 206    // Fill it in
 207    Ver = pkgCache::VerIterator(Cache,Cache.VerP + Version);
 208    Ver->NextVer = Next;
 209    Ver->ID = Cache.HeaderP->VersionCount++;
 210    Ver->VerStr = Map.WriteString(VerStr);
 211    if (Ver->VerStr == 0)
 212       return 0;
 213
 214    return Version;
 215 }
 216                                                                         /*}}}*/
 217 // ListParser::NewDepends - Create a dependency element                 /*{{{*/
 218 // ---------------------------------------------------------------------
 219 /* This creates a dependency element in the tree. It is linked to the
 220    version and to the package that it is pointing to. */
 221 bool pkgCacheGenerator::ListParser::NewDepends(pkgCache::VerIterator Ver,
 222                                                string PackageName,
 223                                                string Version,
 224                                                unsigned int Op,
 225                                                unsigned int Type)
 226 {
 227    pkgCache &Cache = Owner->Cache;
 228
 229    // Get a structure
 230    unsigned long Dependency = Owner->Map.Allocate(sizeof(pkgCache::Dependency));
 231    if (Dependency == 0)
 232       return false;
 233
 234    // Fill it in
 235    pkgCache::DepIterator Dep(Cache,Cache.DepP + Dependency);
 236    Dep->ParentVer = Ver.Index();
 237    Dep->Type = Type;
 238    Dep->CompareOp = Op;
 239    Dep->ID = Cache.HeaderP->DependsCount++;
 240
 241    // Locate the target package
 242    pkgCache::PkgIterator Pkg;
 243    if (Owner->NewPackage(Pkg,PackageName) == false)
 244       return false;
 245
 246    // Probe the reverse dependency list for a version string that matches
 247    if (Version.empty() == false)
 248    {
 249       for (pkgCache::DepIterator I = Pkg.RevDependsList(); I.end() == false; I++)
 250          if (I->Version != 0 && I.TargetVer() == Version)
 251             Dep->Version = I->Version;
 252       if (Dep->Version == 0)
 253          if ((Dep->Version = WriteString(Version)) == 0)
 254             return false;
 255    }
 256
 257    // Link it to the package
 258    Dep->Package = Pkg.Index();
 259    Dep->NextRevDepends = Pkg->RevDepends;
 260    Pkg->RevDepends = Dep.Index();
 261
 262    /* Link it to the version (at the end of the list)
 263       Caching the old end point speeds up generation substantially */
 264    static pkgCache::VerIterator OldVer(Cache);
 265    static __apt_ptrloc *OldLast;
 266    if (OldVer != Ver)
 267    {
 268       OldLast = &Ver->DependsList;
 269       for (pkgCache::DepIterator D = Ver.DependsList(); D.end() == false; D++)
 270          OldLast = &D->NextDepends;
 271       OldVer = Ver;
 272    }
 273
 274    Dep->NextDepends = *OldLast;
 275    *OldLast = Dep.Index();
 276    OldLast = &Dep->NextDepends;
 277
 278    return true;
 279 }
 280                                                                         /*}}}*/
 281 // ListParser::NewProvides - Create a Provides element                  /*{{{*/
 282 // ---------------------------------------------------------------------
 283 /* */
 284 bool pkgCacheGenerator::ListParser::NewProvides(pkgCache::VerIterator Ver,
 285                                                 string PackageName,
 286                                                 string Version)
 287 {
 288    pkgCache &Cache = Owner->Cache;
 289
 290    // We do not add self referencing provides
 291    if (Ver.ParentPkg().Name() == PackageName)
 292       return true;
 293
 294    // Get a structure
 295    unsigned long Provides = Owner->Map.Allocate(sizeof(pkgCache::Provides));
 296    if (Provides == 0)
 297       return false;
 298
 299    // Fill it in
 300    pkgCache::PrvIterator Prv(Cache,Cache.ProvideP + Provides,Cache.PkgP);
 301    Prv->Version = Ver.Index();
 302    Prv->NextPkgProv = Ver->ProvidesList;
 303    Ver->ProvidesList = Prv.Index();
 304    if (Version.empty() == false && (Prv->Version = WriteString(Version)) == 0)
 305       return false;
 306
 307    // Locate the target package
 308    pkgCache::PkgIterator Pkg;
 309    if (Owner->NewPackage(Pkg,PackageName) == false)
 310       return false;
 311
 312    // Link it to the package
 313    Prv->ParentPkg = Pkg.Index();
 314    Prv->NextProvides = Pkg->ProvidesList;
 315    Pkg->ProvidesList = Prv.Index();
 316
 317    return true;
 318 }
 319                                                                         /*}}}*/
 320 // CacheGenerator::SelectFile - Select the current file being parsed    /*{{{*/
 321 // ---------------------------------------------------------------------
 322 /* This is used to select which file is to be associated with all newly
 323    added versions. */
 324 bool pkgCacheGenerator::SelectFile(string File,unsigned long Flags)
 325 {
 326    struct stat Buf;
 327    if (stat(File.c_str(),&Buf) == -1)
 328       return _error->Errno("stat","Couldn't stat ",File.c_str());
 329
 330    // Get some space for the structure
 331    CurrentFile = Cache.PkgFileP + Map.Allocate(sizeof(*CurrentFile));
 332    if (CurrentFile == Cache.PkgFileP)
 333       return false;
 334
 335    // Fill it in
 336    CurrentFile->FileName = Map.WriteString(File);
 337    CurrentFile->Size = Buf.st_size;
 338    CurrentFile->mtime = Buf.st_mtime;
 339    CurrentFile->NextFile = Cache.HeaderP->FileList;
 340    CurrentFile->Flags = Flags;
 341    CurrentFile->ID = Cache.HeaderP->PackageFileCount;
 342    PkgFileName = File;
 343    Cache.HeaderP->FileList = CurrentFile - Cache.PkgFileP;
 344    Cache.HeaderP->PackageFileCount++;
 345
 346    if (CurrentFile->FileName == 0)
 347       return false;
 348
 349    Progress.SubProgress(Buf.st_size);
 350    return true;
 351 }
 352                                                                         /*}}}*/
 353 // CacheGenerator::WriteUniqueString - Insert a unique string           /*{{{*/
 354 // ---------------------------------------------------------------------
 355 /* This is used to create handles to strings. Given the same text it
 356    always returns the same number */
 357 unsigned long pkgCacheGenerator::WriteUniqString(const char *S,
 358                                                  unsigned int Size)
 359 {
 360    // Search for an insertion point
 361    pkgCache::StringItem *I = Cache.StringItemP + Cache.HeaderP->StringList;
 362    int Res = 1;
 363    __apt_ptrloc *Last = &Cache.HeaderP->StringList;
 364    for (; I != Cache.StringItemP; Last = &I->NextItem,
 365         I = Cache.StringItemP + I->NextItem)
 366    {
 367       Res = stringcmp(S,S+Size,Cache.StrP + I->String);
 368       if (Res >= 0)
 369          break;
 370    }
 371
 372    // Match
 373    if (Res == 0)
 374       return I->String;
 375
 376    // Get a structure
 377    unsigned long Item = Map.Allocate(sizeof(pkgCache::StringItem));
 378    if (Item == 0)
 379       return 0;
 380
 381    // Fill in the structure
 382    pkgCache::StringItem *ItemP = Cache.StringItemP + Item;
 383    ItemP->NextItem = I - Cache.StringItemP;
 384    *Last = Item;
 385    ItemP->String = Map.WriteString(S,Size);
 386    if (ItemP->String == 0)
 387       return 0;
 388
 389    return ItemP->String;
 390 }
 391                                                                         /*}}}*/
 392
 393 // SrcCacheCheck - Check if the source package cache is uptodate        /*{{{*/
 394 // ---------------------------------------------------------------------
 395 /* The source cache is checked against the source list and the files
 396    on disk, any difference results in a false. */
 397 bool pkgSrcCacheCheck(pkgSourceList &List)
 398 {
 399    if (_error->PendingError() == true)
 400       return false;
 401
 402    string CacheFile = _config->FindFile("Dir::Cache::srcpkgcache");
 403    string ListDir = _config->FindDir("Dir::State::lists");
 404
 405    // Count the number of missing files
 406    int Missing = 0;
 407    for (pkgSourceList::const_iterator I = List.begin(); I != List.end(); I++)
 408    {
 409       string File = ListDir + URItoFileName(I->PackagesURI());
 410       struct stat Buf;
 411       if (stat(File.c_str(),&Buf) != 0)
 412       {
 413          _error->WarningE("stat","Couldn't stat source package list '%s' (%s)",
 414                           I->PackagesInfo().c_str(),File.c_str());
 415          Missing++;
 416       }
 417    }
 418
 419    // Open the source package cache
 420    if (FileExists(CacheFile) == false)
 421       return false;
 422
 423    FileFd CacheF(CacheFile,FileFd::ReadOnly);
 424    if (_error->PendingError() == true)
 425    {
 426       _error->Discard();
 427       return false;
 428    }
 429
 430    MMap Map(CacheF,MMap::Public | MMap::ReadOnly);
 431    if (_error->PendingError() == true || Map.Size() == 0)
 432    {
 433       _error->Discard();
 434       return false;
 435    }
 436
 437    pkgCache Cache(Map);
 438    if (_error->PendingError() == true)
 439    {
 440       _error->Discard();
 441       return false;
 442    }
 443
 444    // They are certianly out of sync
 445    if (Cache.Head().PackageFileCount != List.size() - Missing)
 446       return false;
 447
 448    for (pkgCache::PkgFileIterator F(Cache); F.end() == false; F++)
 449    {
 450       // Search for a match in the source list
 451       bool Bad = true;
 452       for (pkgSourceList::const_iterator I = List.begin();
 453            I != List.end(); I++)
 454       {
 455          string File = ListDir + URItoFileName(I->PackagesURI());
 456          if (F.FileName() == File)
 457          {
 458             Bad = false;
 459             break;
 460          }
 461       }
 462
 463       // Check if the file matches what was cached
 464       Bad |= !F.IsOk();
 465       if (Bad == true)
 466          return false;
 467    }
 468
 469    return true;
 470 }
 471                                                                         /*}}}*/
 472 // PkgCacheCheck - Check if the package cache is uptodate               /*{{{*/
 473 // ---------------------------------------------------------------------
 474 /* This does a simple check of all files used to compose the cache */
 475 bool pkgPkgCacheCheck(string CacheFile)
 476 {
 477    if (_error->PendingError() == true)
 478       return false;
 479
 480    // Open the source package cache
 481    if (FileExists(CacheFile) == false)
 482       return false;
 483
 484    FileFd CacheF(CacheFile,FileFd::ReadOnly);
 485    if (_error->PendingError() == true)
 486    {
 487       _error->Discard();
 488       return false;
 489    }
 490
 491    MMap Map(CacheF,MMap::Public | MMap::ReadOnly);
 492    if (_error->PendingError() == true || Map.Size() == 0)
 493    {
 494       _error->Discard();
 495       return false;
 496    }
 497
 498    pkgCache Cache(Map);
 499    if (_error->PendingError() == true)
 500    {
 501       _error->Discard();
 502       return false;
 503    }
 504
 505    // Status files that must be in the cache
 506    string Status[3];
 507    Status[0] = _config->FindFile("Dir::State::xstatus");
 508    Status[1]= _config->FindFile("Dir::State::userstatus");
 509    Status[2] = _config->FindFile("Dir::State::status");
 510
 511    // Cheack each file
 512    for (pkgCache::PkgFileIterator F(Cache); F.end() == false; F++)
 513    {
 514       if (F.IsOk() == false)
 515          return false;
 516
 517       // See if this is one of the status files
 518       for (int I = 0; I != 3; I++)
 519          if (F.FileName() == Status[I])
 520             Status[I] = string();
 521    }
 522
 523    // Make sure all the status files are loaded.
 524    for (int I = 0; I != 3; I++)
 525    {
 526       if (Status[I].empty() == false && FileExists(Status[I]) == true)
 527          return false;
 528    }
 529
 530    return true;
 531 }
 532                                                                         /*}}}*/
 533 // AddSourcesSize - Add the size of the status files                    /*{{{*/
 534 // ---------------------------------------------------------------------
 535 /* This adds the size of all the status files to the size counter */
 536 static bool pkgAddSourcesSize(unsigned long &TotalSize)
 537 {
 538    // Grab the file names
 539    string xstatus = _config->FindFile("Dir::State::xstatus");
 540    string userstatus = _config->FindFile("Dir::State::userstatus");
 541    string status = _config->FindFile("Dir::State::status");
 542
 543    // Grab the sizes
 544    struct stat Buf;
 545    if (stat(xstatus.c_str(),&Buf) == 0)
 546       TotalSize += Buf.st_size;
 547    if (stat(userstatus.c_str(),&Buf) == 0)
 548       TotalSize += Buf.st_size;
 549    if (stat(status.c_str(),&Buf) != 0)
 550       return _error->Errno("stat","Couldn't stat the status file %s",status.c_str());
 551    TotalSize += Buf.st_size;
 552
 553    return true;
 554 }
 555                                                                         /*}}}*/
 556 // MergeStatus - Add the status files to the cache                      /*{{{*/
 557 // ---------------------------------------------------------------------
 558 /* This adds the status files to the map */
 559 static bool pkgMergeStatus(OpProgress &Progress,pkgCacheGenerator &Gen,
 560                            unsigned long &CurrentSize,unsigned long TotalSize)
 561 {
 562    // Grab the file names
 563    string Status[3];
 564    Status[0] = _config->FindFile("Dir::State::xstatus");
 565    Status[1]= _config->FindFile("Dir::State::userstatus");
 566    Status[2] = _config->FindFile("Dir::State::status");
 567
 568    for (int I = 0; I != 3; I++)
 569    {
 570       // Check if the file exists and it is not the primary status file.
 571       string File = Status[I];
 572       if (I != 2 && FileExists(File) == false)
 573          continue;
 574
 575       FileFd Pkg(File,FileFd::ReadOnly);
 576       debListParser Parser(Pkg);
 577       Progress.OverallProgress(CurrentSize,TotalSize,Pkg.Size(),"Reading Package Lists");
 578       if (_error->PendingError() == true)
 579          return _error->Error("Problem opening %s",File.c_str());
 580       CurrentSize += Pkg.Size();
 581
 582       Progress.SubProgress(0,"Local Package State - " + flNotDir(File));
 583       if (Gen.SelectFile(File,pkgCache::Flag::NotSource) == false)
 584          return _error->Error("Problem with SelectFile %s",File.c_str());
 585
 586       if (Gen.MergeList(Parser) == false)
 587          return _error->Error("Problem with MergeList %s",File.c_str());
 588       Progress.Progress(Pkg.Size());
 589    }
 590
 591    return true;
 592 }
 593                                                                         /*}}}*/
 594 // MakeStatusCache - Generates a cache that includes the status files   /*{{{*/
 595 // ---------------------------------------------------------------------
 596 /* This copies the package source cache and then merges the status and
 597    xstatus files into it. */
 598 bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress)
 599 {
 600    Progress.OverallProgress(0,1,1,"Reading Package Lists");
 601
 602    string CacheFile = _config->FindFile("Dir::Cache::pkgcache");
 603    bool SrcOk = pkgSrcCacheCheck(List);
 604    bool PkgOk = SrcOk && pkgPkgCacheCheck(CacheFile);
 605
 606    // Rebuild the source and package caches
 607    if (SrcOk == false)
 608    {
 609       string SCacheFile = _config->FindFile("Dir::Cache::srcpkgcache");
 610       string ListDir = _config->FindDir("Dir::State::lists");
 611       FileFd SCacheF(SCacheFile,FileFd::WriteEmpty);
 612       FileFd CacheF(CacheFile,FileFd::WriteEmpty);
 613       DynamicMMap Map(CacheF,MMap::Public);
 614       if (_error->PendingError() == true)
 615          return false;
 616
 617       pkgCacheGenerator Gen(Map,Progress);
 618
 619       // Prepare the progress indicator
 620       unsigned long TotalSize = 0;
 621       struct stat Buf;
 622       for (pkgSourceList::const_iterator I = List.begin(); I != List.end(); I++)
 623       {
 624          string File = ListDir + URItoFileName(I->PackagesURI());
 625          if (stat(File.c_str(),&Buf) != 0)
 626             continue;
 627          TotalSize += Buf.st_size;
 628       }
 629
 630       if (pkgAddSourcesSize(TotalSize) == false)
 631          return false;
 632
 633       // Generate the pkg source cache
 634       unsigned long CurrentSize = 0;
 635       for (pkgSourceList::const_iterator I = List.begin(); I != List.end(); I++)
 636       {
 637          string File = ListDir + URItoFileName(I->PackagesURI());
 638
 639          if (stat(File.c_str(),&Buf) != 0)
 640             continue;
 641
 642          FileFd Pkg(File,FileFd::ReadOnly);
 643          debListParser Parser(Pkg);
 644          Progress.OverallProgress(CurrentSize,TotalSize,Pkg.Size(),"Reading Package Lists");
 645          if (_error->PendingError() == true)
 646             return _error->Error("Problem opening %s",File.c_str());
 647          CurrentSize += Pkg.Size();
 648
 649          Progress.SubProgress(0,I->PackagesInfo());
 650          if (Gen.SelectFile(File) == false)
 651             return _error->Error("Problem with SelectFile %s",File.c_str());
 652
 653          if (Gen.MergeList(Parser) == false)
 654             return _error->Error("Problem with MergeList %s",File.c_str());
 655       }
 656
 657       // Write the src cache
 658       Gen.GetCache().HeaderP->Dirty = false;
 659       if (SCacheF.Write(Map.Data(),Map.Size()) == false)
 660          return _error->Error("IO Error saving source cache");
 661       Gen.GetCache().HeaderP->Dirty = true;
 662
 663       // Merge in the source caches
 664       return pkgMergeStatus(Progress,Gen,CurrentSize,TotalSize);
 665    }
 666
 667    if (PkgOk == true)
 668    {
 669       Progress.OverallProgress(1,1,1,"Reading Package Lists");
 670       return true;
 671    }
 672
 673    // We use the source cache to generate the package cache
 674    string SCacheFile = _config->FindFile("Dir::Cache::srcpkgcache");
 675
 676    FileFd SCacheF(SCacheFile,FileFd::ReadOnly);
 677    FileFd CacheF(CacheFile,FileFd::WriteEmpty);
 678    DynamicMMap Map(CacheF,MMap::Public);
 679    if (_error->PendingError() == true)
 680       return false;
 681
 682    // Preload the map with the source cache
 683    if (SCacheF.Read((unsigned char *)Map.Data() + Map.RawAllocate(SCacheF.Size()),
 684                     SCacheF.Size()) == false)
 685       return false;
 686
 687    pkgCacheGenerator Gen(Map,Progress);
 688
 689    // Compute the progress
 690    unsigned long TotalSize = 0;
 691    if (pkgAddSourcesSize(TotalSize) == false)
 692       return false;
 693
 694    unsigned long CurrentSize = 0;
 695    return pkgMergeStatus(Progress,Gen,CurrentSize,TotalSize);
 696 }
 697                                                                         /*}}}*/