apt-pkg/upgrade.cc

   1 // Include Files                                                        /*{{{*/
   2 #include <config.h>
   3
   4 #include <apt-pkg/algorithms.h>
   5 #include <apt-pkg/configuration.h>
   6 #include <apt-pkg/edsp.h>
   7 #include <apt-pkg/error.h>
   8 #include <apt-pkg/progress.h>
   9 #include <apt-pkg/upgrade.h>
  10 #include <apt-pkg/depcache.h>
  11 #include <apt-pkg/pkgcache.h>
  12 #include <apt-pkg/cacheiterators.h>
  13
  14 #include <string>
  15
  16 #include <apti18n.h>
  17                                                                         /*}}}*/
  18
  19 // DistUpgrade - Distribution upgrade                                   /*{{{*/
  20 // ---------------------------------------------------------------------
  21 /* This autoinstalls every package and then force installs every
  22    pre-existing package. This creates the initial set of conditions which
  23    most likely contain problems because too many things were installed.
  24
  25    The problem resolver is used to resolve the problems.
  26  */
  27 bool pkgDistUpgrade(pkgDepCache &Cache, OpProgress * const Progress)
  28 {
  29    std::string const solver = _config->Find("APT::Solver", "internal");
  30    if (solver != "internal")
  31       return EDSP::ResolveExternal(solver.c_str(), Cache, false, true, false, Progress);
  32
  33    if (Progress != NULL)
  34       Progress->OverallProgress(0, 100, 1, _("Calculating upgrade"));
  35
  36    pkgDepCache::ActionGroup group(Cache);
  37
  38    /* Upgrade all installed packages first without autoinst to help the resolver
  39       in versioned or-groups to upgrade the old solver instead of installing
  40       a new one (if the old solver is not the first one [anymore]) */
  41    for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
  42       if (I->CurrentVer != 0)
  43          Cache.MarkInstall(I, false, 0, false);
  44
  45    if (Progress != NULL)
  46       Progress->Progress(10);
  47
  48    /* Auto upgrade all installed packages, this provides the basis
  49       for the installation */
  50    for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
  51       if (I->CurrentVer != 0)
  52          Cache.MarkInstall(I, true, 0, false);
  53
  54    if (Progress != NULL)
  55       Progress->Progress(50);
  56
  57    /* Now, install each essential package which is not installed
  58       (and not provided by another package in the same name group) */
  59    std::string essential = _config->Find("pkgCacheGen::Essential", "all");
  60    if (essential == "all")
  61    {
  62       for (pkgCache::GrpIterator G = Cache.GrpBegin(); G.end() == false; ++G)
  63       {
  64          bool isEssential = false;
  65          bool instEssential = false;
  66          for (pkgCache::PkgIterator P = G.PackageList(); P.end() == false; P = G.NextPkg(P))
  67          {
  68             if ((P->Flags & pkgCache::Flag::Essential) != pkgCache::Flag::Essential)
  69                continue;
  70             isEssential = true;
  71             if (Cache[P].Install() == true)
  72             {
  73                instEssential = true;
  74                break;
  75             }
  76          }
  77          if (isEssential == false || instEssential == true)
  78             continue;
  79          pkgCache::PkgIterator P = G.FindPreferredPkg();
  80          Cache.MarkInstall(P, true, 0, false);
  81       }
  82    }
  83    else if (essential != "none")
  84       for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
  85          if ((I->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential)
  86             Cache.MarkInstall(I, true, 0, false);
  87
  88    if (Progress != NULL)
  89       Progress->Progress(55);
  90
  91    /* We do it again over all previously installed packages to force
  92       conflict resolution on them all. */
  93    for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
  94       if (I->CurrentVer != 0)
  95          Cache.MarkInstall(I, false, 0, false);
  96
  97    if (Progress != NULL)
  98       Progress->Progress(65);
  99
 100    pkgProblemResolver Fix(&Cache);
 101
 102    if (Progress != NULL)
 103       Progress->Progress(95);
 104
 105    // Hold back held packages.
 106    if (_config->FindB("APT::Ignore-Hold",false) == false)
 107    {
 108       for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
 109       {
 110          if (I->SelectedState == pkgCache::State::Hold)
 111          {
 112             Fix.Protect(I);
 113             Cache.MarkKeep(I, false, false);
 114          }
 115       }
 116    }
 117
 118    bool const success = Fix.Resolve(false, Progress);
 119    if (Progress != NULL)
 120       Progress->Done();
 121    return success;
 122 }
 123                                                                         /*}}}*/
 124 // AllUpgradeNoNewPackages - Upgrade but no removals or new pkgs        /*{{{*/
 125 static bool pkgAllUpgradeNoNewPackages(pkgDepCache &Cache, OpProgress * const Progress)
 126 {
 127    std::string const solver = _config->Find("APT::Solver", "internal");
 128    if (solver != "internal")
 129       return EDSP::ResolveExternal(solver.c_str(), Cache, true, false, false, Progress);
 130
 131    if (Progress != NULL)
 132       Progress->OverallProgress(0, 100, 1, _("Calculating upgrade"));
 133
 134    pkgDepCache::ActionGroup group(Cache);
 135
 136    pkgProblemResolver Fix(&Cache);
 137
 138    if (Cache.BrokenCount() != 0)
 139       return false;
 140
 141    // Upgrade all installed packages
 142    for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
 143    {
 144       if (Cache[I].Install() == true)
 145          Fix.Protect(I);
 146
 147       if (_config->FindB("APT::Ignore-Hold",false) == false)
 148          if (I->SelectedState == pkgCache::State::Hold)
 149             continue;
 150
 151       if (I->CurrentVer != 0 && Cache[I].InstallVer != 0)
 152          Cache.MarkInstall(I, false, 0, false);
 153    }
 154
 155    if (Progress != NULL)
 156       Progress->Progress(50);
 157
 158    // resolve remaining issues via keep
 159    bool const success = Fix.ResolveByKeep(Progress);
 160    if (Progress != NULL)
 161       Progress->Done();
 162    return success;
 163 }
 164                                                                         /*}}}*/
 165 // AllUpgradeWithNewInstalls - Upgrade + install new packages as needed /*{{{*/
 166 // ---------------------------------------------------------------------
 167 /* Right now the system must be consistent before this can be called.
 168  * Upgrade as much as possible without deleting anything (useful for
 169  * stable systems)
 170  */
 171 static bool pkgAllUpgradeWithNewPackages(pkgDepCache &Cache, OpProgress * const Progress)
 172 {
 173    std::string const solver = _config->Find("APT::Solver", "internal");
 174    if (solver != "internal")
 175       return EDSP::ResolveExternal(solver.c_str(), Cache, true, false, false, Progress);
 176
 177    if (Progress != NULL)
 178       Progress->OverallProgress(0, 100, 1, _("Calculating upgrade"));
 179
 180    pkgDepCache::ActionGroup group(Cache);
 181
 182    pkgProblemResolver Fix(&Cache);
 183
 184    if (Cache.BrokenCount() != 0)
 185       return false;
 186
 187    // provide the initial set of stuff we want to upgrade by marking
 188    // all upgradable packages for upgrade
 189    for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
 190    {
 191       if (I->CurrentVer != 0 && Cache[I].InstallVer != 0)
 192       {
 193          if (_config->FindB("APT::Ignore-Hold",false) == false)
 194             if (I->SelectedState == pkgCache::State::Hold)
 195                continue;
 196
 197          Cache.MarkInstall(I, false, 0, false);
 198       }
 199    }
 200
 201    if (Progress != NULL)
 202       Progress->Progress(10);
 203
 204    // then let auto-install loose
 205    for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
 206       if (Cache[I].Install())
 207          Cache.MarkInstall(I, true, 0, false);
 208
 209    if (Progress != NULL)
 210       Progress->Progress(50);
 211
 212    // ... but it may remove stuff, we we need to clean up afterwards again
 213    for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
 214       if (Cache[I].Delete() == true)
 215          Cache.MarkKeep(I, false, false);
 216
 217    if (Progress != NULL)
 218       Progress->Progress(60);
 219
 220    // resolve remaining issues via keep
 221    bool const success = Fix.ResolveByKeep(Progress);
 222    if (Progress != NULL)
 223       Progress->Done();
 224    return success;
 225 }
 226                                                                         /*}}}*/
 227 // AllUpgrade - Upgrade as many packages as possible                    /*{{{*/
 228 // ---------------------------------------------------------------------
 229 /* Right now the system must be consistent before this can be called.
 230    It also will not change packages marked for install, it only tries
 231    to install packages not marked for install */
 232 bool pkgAllUpgrade(pkgDepCache &Cache, OpProgress * const Progress)
 233 {
 234    return pkgAllUpgradeNoNewPackages(Cache, Progress);
 235 }
 236                                                                         /*}}}*/
 237 // MinimizeUpgrade - Minimizes the set of packages to be upgraded       /*{{{*/
 238 // ---------------------------------------------------------------------
 239 /* This simply goes over the entire set of packages and tries to keep
 240    each package marked for upgrade. If a conflict is generated then
 241    the package is restored. */
 242 bool pkgMinimizeUpgrade(pkgDepCache &Cache)
 243 {
 244    pkgDepCache::ActionGroup group(Cache);
 245
 246    if (Cache.BrokenCount() != 0)
 247       return false;
 248
 249    // We loop for 10 tries to get the minimal set size.
 250    bool Change = false;
 251    unsigned int Count = 0;
 252    do
 253    {
 254       Change = false;
 255       for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
 256       {
 257          // Not interesting
 258          if (Cache[I].Upgrade() == false || Cache[I].NewInstall() == true)
 259             continue;
 260
 261          // Keep it and see if that is OK
 262          Cache.MarkKeep(I, false, false);
 263          if (Cache.BrokenCount() != 0)
 264             Cache.MarkInstall(I, false, 0, false);
 265          else
 266          {
 267             // If keep didn't actually do anything then there was no change..
 268             if (Cache[I].Upgrade() == false)
 269                Change = true;
 270          }
 271       }
 272       ++Count;
 273    }
 274    while (Change == true && Count < 10);
 275
 276    if (Cache.BrokenCount() != 0)
 277       return _error->Error("Internal Error in pkgMinimizeUpgrade");
 278
 279    return true;
 280 }
 281                                                                         /*}}}*/
 282 // APT::Upgrade::Upgrade - Upgrade using a specific strategy            /*{{{*/
 283 bool APT::Upgrade::Upgrade(pkgDepCache &Cache, int mode, OpProgress * const Progress)
 284 {
 285 #if __GNUC__ >= 4
 286         // the deprecated methods will become our privates, so that is fine
 287         #pragma GCC diagnostic push
 288         #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 289 #endif
 290    if (mode == ALLOW_EVERYTHING)
 291       return pkgDistUpgrade(Cache, Progress);
 292    else if ((mode & ~FORBID_REMOVE_PACKAGES) == 0)
 293       return pkgAllUpgradeWithNewPackages(Cache, Progress);
 294    else if ((mode & ~(FORBID_REMOVE_PACKAGES|FORBID_INSTALL_NEW_PACKAGES)) == 0)
 295       return pkgAllUpgradeNoNewPackages(Cache, Progress);
 296    else
 297       _error->Error("pkgAllUpgrade called with unsupported mode %i", mode);
 298 #if __GNUC__ >= 4
 299         #pragma GCC diagnostic pop
 300 #endif
 301    return false;
 302 }
 303                                                                         /*}}}*/