]> git.saurik.com Git - apt.git/blobdiff - apt-pkg/depcache.cc
* cmdline/apt-mark:
[apt.git] / apt-pkg / depcache.cc
index c6bf3185ae2b09bb4e093c6d91a02bf53f544b15..7663d38814b16de97ad0a2fa62deb34edd6cee24 100644 (file)
 #include <apt-pkg/error.h>
 #include <apt-pkg/sptr.h>
 #include <apt-pkg/algorithms.h>
-    
+
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/pkgsystem.h>
+#include <apt-pkg/tagfile.h>
+
+#include <iostream>
+#include <sstream>    
+#include <set>
+
 #include <apti18n.h>    
-                                                                       /*}}}*/
+
+pkgDepCache::ActionGroup::ActionGroup(pkgDepCache &cache) :
+  cache(cache), released(false)
+{
+  ++cache.group_level;
+}
+
+void pkgDepCache::ActionGroup::release()
+{
+  if(!released)
+    {
+      if(cache.group_level == 0)
+       std::cerr << "W: Unbalanced action groups, expect badness" << std::endl;
+      else
+       {
+         --cache.group_level;
+
+         if(cache.group_level == 0)
+           cache.MarkAndSweep();
+       }
+
+      released = false;
+    }
+}
+
+pkgDepCache::ActionGroup::~ActionGroup()
+{
+  release();
+}
 
 // DepCache::pkgDepCache - Constructors                                        /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 pkgDepCache::pkgDepCache(pkgCache *pCache,Policy *Plcy) :
-                Cache(pCache), PkgState(0), DepState(0)
+  group_level(0), Cache(pCache), PkgState(0), DepState(0)
 {
    delLocalPolicy = 0;
    LocalPolicy = Plcy;
@@ -47,6 +84,10 @@ pkgDepCache::~pkgDepCache()
 /* This allocats the extension buffers and initializes them. */
 bool pkgDepCache::Init(OpProgress *Prog)
 {
+   // Suppress mark updates during this operation (just in case) and
+   // run a mark operation when Init terminates.
+   ActionGroup actions(*this);
+
    delete [] PkgState;
    delete [] DepState;
    PkgState = new StateCache[Head().PackageCount];
@@ -72,7 +113,7 @@ bool pkgDepCache::Init(OpProgress *Prog)
       // Find the proper cache slot
       StateCache &State = PkgState[I->ID];
       State.iFlags = 0;
-      
+
       // Figure out the install version
       State.CandidateVer = GetCandidateVer(I);
       State.InstallVer = I.CurrentVer();
@@ -91,11 +132,123 @@ bool pkgDepCache::Init(OpProgress *Prog)
    }
    
    Update(Prog);
-   
+
+   if(Prog != 0)
+      Prog->Done();
+
    return true;
 } 
                                                                        /*}}}*/
 
+bool pkgDepCache::readStateFile(OpProgress *Prog)
+{
+   FileFd state_file;
+   string state = _config->FindDir("Dir::State") + "extended_states";
+   if(FileExists(state)) {
+      state_file.Open(state, FileFd::ReadOnly);
+      int file_size = state_file.Size();
+      if(Prog != NULL)
+        Prog->OverallProgress(0, file_size, 1, 
+                              _("Reading state information"));
+
+      pkgTagFile tagfile(&state_file);
+      pkgTagSection section;
+      int amt=0;
+      while(tagfile.Step(section)) {
+        string pkgname = section.FindS("Package");
+        pkgCache::PkgIterator pkg=Cache->FindPkg(pkgname);
+        // Silently ignore unknown packages and packages with no actual
+        // version.
+        if(!pkg.end() && !pkg.VersionList().end()) {
+           short reason = section.FindI("Auto-Installed", 0);
+           if(reason > 0)
+              PkgState[pkg->ID].Flags  |= Flag::Auto;
+           if(_config->FindB("Debug::pkgAutoRemove",false))
+              std::cout << "Auto-Installed : " << pkgname << std::endl;
+           amt+=section.size();
+           if(Prog != NULL)
+              Prog->OverallProgress(amt, file_size, 1, 
+                                    _("Reading state information"));
+        }
+        if(Prog != NULL)
+           Prog->OverallProgress(file_size, file_size, 1, 
+                                 _("Reading state information"));
+      }
+   }
+
+   return true;
+}
+
+bool pkgDepCache::writeStateFile(OpProgress *prog)
+{
+   if(_config->FindB("Debug::pkgAutoRemove",false))
+      std::clog << "pkgDepCache::writeStateFile()" << std::endl;
+
+   FileFd StateFile;
+   string state = _config->FindDir("Dir::State") + "extended_states";
+   if(!StateFile.Open(state, FileFd::ReadOnly))
+      return _error->Error(_("Failed to open StateFile %s"),
+                          state.c_str());
+
+   FILE *OutFile;
+   string outfile = state + ".tmp";
+   if((OutFile = fopen(outfile.c_str(),"w")) == NULL)
+      return _error->Error(_("Failed to write temporary StateFile %s"),
+                          outfile.c_str());
+
+   // first merge with the existing sections
+   pkgTagFile tagfile(&StateFile);
+   pkgTagSection section;
+   std::set<string> pkgs_seen;
+   const char *nullreorderlist[] = {0};
+   while(tagfile.Step(section)) {
+        string pkgname = section.FindS("Package");
+        // Silently ignore unknown packages and packages with no actual
+        // version.
+        pkgCache::PkgIterator pkg=Cache->FindPkg(pkgname);
+        if(pkg.end() || pkg.VersionList().end()) 
+           continue;
+        bool oldAuto = section.FindI("Auto-Installed");
+        bool newAuto = (PkgState[pkg->ID].Flags & Flag::Auto);
+        if(_config->FindB("Debug::pkgAutoRemove",false))
+           std::clog << "Update exisiting AutoInstall info: " 
+                     << pkg.Name() << std::endl;
+        TFRewriteData rewrite[2];
+        rewrite[0].Tag = "Auto-Installed";
+        rewrite[0].Rewrite = newAuto ? "1" : "0";
+        rewrite[0].NewTag = 0;
+        rewrite[1].Tag = 0;
+        TFRewrite(OutFile, section, nullreorderlist, rewrite);
+        fprintf(OutFile,"\n");
+        pkgs_seen.insert(pkgname);
+   }
+   
+   // then write the ones we have not seen yet
+   std::ostringstream ostr;
+   for(pkgCache::PkgIterator pkg=Cache->PkgBegin(); !pkg.end(); pkg++) {
+      if(PkgState[pkg->ID].Flags & Flag::Auto) {
+        if (pkgs_seen.find(pkg.Name()) != pkgs_seen.end()) {
+           if(_config->FindB("Debug::pkgAutoRemove",false))
+              std::clog << "Skipping already written " << pkg.Name() << std::endl;
+           continue;
+        }
+        if(_config->FindB("Debug::pkgAutoRemove",false))
+           std::clog << "Writing new AutoInstall: " 
+                     << pkg.Name() << std::endl;
+        ostr.str(string(""));
+        ostr << "Package: " << pkg.Name() 
+             << "\nAuto-Installed: 1\n\n";
+        fprintf(OutFile,ostr.str().c_str());
+        fprintf(OutFile,"\n");
+      }
+   }
+
+   // move the outfile over the real file
+   rename(outfile.c_str(), state.c_str());
+
+   return true;
+}
+
 // DepCache::CheckDep - Checks a single dependency                     /*{{{*/
 // ---------------------------------------------------------------------
 /* This first checks the dependency against the main target package and
@@ -449,12 +602,14 @@ void pkgDepCache::Update(OpProgress *Prog)
 
    if (Prog != 0)      
       Prog->Progress(Done);
+
+   readStateFile(Prog);
 }
                                                                        /*}}}*/
 // DepCache::Update - Update the deps list of a package                        /*{{{*/
 // ---------------------------------------------------------------------
 /* This is a helper for update that only does the dep portion of the scan. 
-   It is mainly ment to scan reverse dependencies. */
+   It is mainly meant to scan reverse dependencies. */
 void pkgDepCache::Update(DepIterator D)
 {
    // Update the reverse deps
@@ -506,7 +661,7 @@ void pkgDepCache::Update(PkgIterator const &Pkg)
 // DepCache::MarkKeep - Put the package in the keep state              /*{{{*/
 // ---------------------------------------------------------------------
 /* */
-void pkgDepCache::MarkKeep(PkgIterator const &Pkg,bool Soft)
+void pkgDepCache::MarkKeep(PkgIterator const &Pkg, bool Soft, bool FromUser)
 {
    // Simplifies other routines.
    if (Pkg.end() == true)
@@ -518,6 +673,9 @@ void pkgDepCache::MarkKeep(PkgIterator const &Pkg,bool Soft)
        Pkg.CurrentVer().Downloadable() == false)
       return;
    
+   /** \todo Can this be moved later in the method? */
+   ActionGroup group(*this);
+
    /* We changed the soft state all the time so the UI is a bit nicer
       to use */
    StateCache &P = PkgState[Pkg->ID];
@@ -534,7 +692,8 @@ void pkgDepCache::MarkKeep(PkgIterator const &Pkg,bool Soft)
    if (Pkg->VersionList == 0)
       return;
    
-   P.Flags &= ~Flag::Auto;
+   if(FromUser && !P.Marked)
+     P.Flags &= ~Flag::Auto;
    RemoveSizes(Pkg);
    RemoveStates(Pkg);
 
@@ -560,6 +719,8 @@ void pkgDepCache::MarkDelete(PkgIterator const &Pkg, bool rPurge)
    if (Pkg.end() == true)
       return;
 
+   ActionGroup group(*this);
+
    // Check that it is not already marked for delete
    StateCache &P = PkgState[Pkg->ID];
    P.iFlags &= ~(AutoKept | Purge);
@@ -582,7 +743,6 @@ void pkgDepCache::MarkDelete(PkgIterator const &Pkg, bool rPurge)
    else
       P.Mode = ModeDelete;
    P.InstallVer = 0;
-   P.Flags &= Flag::Auto;
 
    AddStates(Pkg);   
    Update(Pkg);
@@ -593,7 +753,7 @@ void pkgDepCache::MarkDelete(PkgIterator const &Pkg, bool rPurge)
 // ---------------------------------------------------------------------
 /* */
 void pkgDepCache::MarkInstall(PkgIterator const &Pkg,bool AutoInst,
-                             unsigned long Depth)
+                             unsigned long Depth, bool FromUser)
 {
    if (Depth > 100)
       return;
@@ -602,6 +762,8 @@ void pkgDepCache::MarkInstall(PkgIterator const &Pkg,bool AutoInst,
    if (Pkg.end() == true)
       return;
    
+   ActionGroup group(*this);
+
    /* Check that it is not already marked for install and that it can be 
       installed */
    StateCache &P = PkgState[Pkg->ID];
@@ -610,7 +772,7 @@ void pkgDepCache::MarkInstall(PkgIterator const &Pkg,bool AutoInst,
        P.CandidateVer == (Version *)Pkg.CurrentVer()))
    {
       if (P.CandidateVer == (Version *)Pkg.CurrentVer() && P.InstallVer == 0)
-        MarkKeep(Pkg);
+        MarkKeep(Pkg, false, FromUser);
       return;
    }
 
@@ -630,7 +792,20 @@ void pkgDepCache::MarkInstall(PkgIterator const &Pkg,bool AutoInst,
    
    P.Mode = ModeInstall;
    P.InstallVer = P.CandidateVer;
-   P.Flags &= ~Flag::Auto;
+
+   if(FromUser)
+     {
+       // Set it to manual if it's a new install or cancelling the
+       // removal of a garbage package.
+       if(P.Status == 2 || (!Pkg.CurrentVer().end() && !P.Marked))
+        P.Flags &= ~Flag::Auto;
+     }
+   else
+     {
+       // Set it to auto if this is a new install.
+       if(P.Status == 2)
+        P.Flags |= Flag::Auto;
+     }
    if (P.CandidateVer == (Version *)Pkg.CurrentVer())
       P.Mode = ModeKeep;
        
@@ -707,15 +882,14 @@ void pkgDepCache::MarkInstall(PkgIterator const &Pkg,bool AutoInst,
            }
         }
         
-        if (InstPkg.end() == false)
+        if (InstPkg.end() == false) 
         {
-           MarkInstall(InstPkg,true,Depth + 1);
-
-           // Set the autoflag, after MarkInstall because MarkInstall unsets it
-           if (P->CurrentVer == 0)
-              PkgState[InstPkg->ID].Flags |= Flag::Auto;
+           if(_config->FindB("Debug::pkgDepCache::AutoInstall",false) == true)
+              std::clog << "Installing " << InstPkg.Name() 
+                        << " as dep of " << Pkg.Name() 
+                        << std::endl;
+          MarkInstall(InstPkg, true, Depth + 1, false);
         }
-        
         continue;
       }
       
@@ -729,7 +903,6 @@ void pkgDepCache::MarkInstall(PkgIterator const &Pkg,bool AutoInst,
            PkgIterator Pkg = Ver.ParentPkg();
       
            MarkDelete(Pkg);
-           PkgState[Pkg->ID].Flags |= Flag::Auto;
         }
         continue;
       }      
@@ -741,6 +914,8 @@ void pkgDepCache::MarkInstall(PkgIterator const &Pkg,bool AutoInst,
 /* */
 void pkgDepCache::SetReInstall(PkgIterator const &Pkg,bool To)
 {
+   ActionGroup group(*this);
+
    RemoveSizes(Pkg);
    RemoveStates(Pkg);
    
@@ -759,9 +934,11 @@ void pkgDepCache::SetReInstall(PkgIterator const &Pkg,bool To)
 /* */
 void pkgDepCache::SetCandidateVersion(VerIterator TargetVer)
 {
+   ActionGroup group(*this);
+
    pkgCache::PkgIterator Pkg = TargetVer.ParentPkg();
    StateCache &P = PkgState[Pkg->ID];
-   
+
    RemoveSizes(Pkg);
    RemoveStates(Pkg);
 
@@ -774,6 +951,18 @@ void pkgDepCache::SetCandidateVersion(VerIterator TargetVer)
    Update(Pkg);
    AddSizes(Pkg);
 }
+
+void pkgDepCache::MarkAuto(const PkgIterator &Pkg, bool Auto)
+{
+  StateCache &state = PkgState[Pkg->ID];
+
+  ActionGroup group(*this);
+
+  if(Auto)
+    state.Flags |= Flag::Auto;
+  else
+    state.Flags &= ~Flag::Auto;
+}
                                                                        /*}}}*/
 // StateCache::Update - Compute the various static display things      /*{{{*/
 // ---------------------------------------------------------------------
@@ -864,3 +1053,216 @@ bool pkgDepCache::Policy::IsImportantDep(DepIterator Dep)
    return Dep.IsCritical();
 }
                                                                        /*}}}*/
+
+pkgDepCache::DefaultRootSetFunc::DefaultRootSetFunc()
+  : constructedSuccessfully(false)
+{
+  Configuration::Item const *Opts;
+  Opts = _config->Tree("APT::NeverAutoRemove");
+  if (Opts != 0 && Opts->Child != 0)
+    {
+      Opts = Opts->Child;
+      for (; Opts != 0; Opts = Opts->Next)
+       {
+         if (Opts->Value.empty() == true)
+           continue;
+
+         regex_t *p = new regex_t;
+         if(regcomp(p,Opts->Value.c_str(),
+                    REG_EXTENDED | REG_ICASE | REG_NOSUB) != 0)
+           {
+             regfree(p);
+             delete p;
+             _error->Error("Regex compilation error for APT::NeverAutoRemove");
+             return;
+           }
+
+         rootSetRegexp.push_back(p);
+       }
+    }
+
+  constructedSuccessfully = true;
+}
+
+pkgDepCache::DefaultRootSetFunc::~DefaultRootSetFunc()
+{
+  for(unsigned int i = 0; i < rootSetRegexp.size(); i++)
+    {
+      regfree(rootSetRegexp[i]);
+      delete rootSetRegexp[i];
+    }
+}
+
+
+bool pkgDepCache::DefaultRootSetFunc::InRootSet(const pkgCache::PkgIterator &pkg)
+{
+   for(unsigned int i = 0; i < rootSetRegexp.size(); i++)
+      if (regexec(rootSetRegexp[i], pkg.Name(), 0, 0, 0) == 0)
+        return true;
+
+   return false;
+}
+
+pkgDepCache::InRootSetFunc *pkgDepCache::GetRootSetFunc()
+{
+  DefaultRootSetFunc *f = new DefaultRootSetFunc;
+  if(f->wasConstructedSuccessfully())
+    return f;
+  else
+    {
+      delete f;
+      return NULL;
+    }
+}
+
+bool pkgDepCache::MarkFollowsRecommends()
+{
+  return _config->FindB("APT::AutoRemove::RecommendsImportant", true);
+}
+
+bool pkgDepCache::MarkFollowsSuggests()
+{
+  return _config->FindB("APT::AutoRemove::SuggestsImportant", false);
+}
+
+// the main mark algorithm
+bool pkgDepCache::MarkRequired(InRootSetFunc &userFunc)
+{
+   bool follow_recommends;
+   bool follow_suggests;
+
+   // init the states
+   for(PkgIterator p = PkgBegin(); !p.end(); ++p)
+   {
+      PkgState[p->ID].Marked  = false;
+      PkgState[p->ID].Garbage = false;
+
+      // debug output
+      if(_config->FindB("Debug::pkgAutoRemove",false) 
+        && PkgState[p->ID].Flags & Flag::Auto)
+        std::clog << "AutoDep: " << p.Name() << std::endl;
+   }
+
+   // init vars
+   follow_recommends = MarkFollowsRecommends();
+   follow_suggests   = MarkFollowsSuggests();
+
+
+
+   // do the mark part, this is the core bit of the algorithm
+   for(PkgIterator p = PkgBegin(); !p.end(); ++p)
+   {
+      if(!(PkgState[p->ID].Flags & Flag::Auto) ||
+         (p->Flags & Flag::Essential) ||
+         userFunc.InRootSet(p))
+          
+      {
+        // the package is installed (and set to keep)
+        if(PkgState[p->ID].Keep() && !p.CurrentVer().end())
+           MarkPackage(p, p.CurrentVer(),
+                       follow_recommends, follow_suggests);
+        // the package is to be installed 
+        else if(PkgState[p->ID].Install())
+           MarkPackage(p, PkgState[p->ID].InstVerIter(*this),
+                       follow_recommends, follow_suggests);
+      }
+   }
+
+   return true;
+}
+
+// mark a single package in Mark-and-Sweep
+void pkgDepCache::MarkPackage(const pkgCache::PkgIterator &pkg,
+                             const pkgCache::VerIterator &ver,
+                             bool follow_recommends,
+                             bool follow_suggests)
+{
+   pkgDepCache::StateCache &state = PkgState[pkg->ID];
+   VerIterator candver            = state.CandidateVerIter(*this);
+   VerIterator instver            = state.InstVerIter(*this);
+
+#if 0
+   // If a package was garbage-collected but is now being marked, we
+   // should re-select it 
+   // For cases when a pkg is set to upgrade and this trigger the
+   // removal of a no-longer used dependency.  if the pkg is set to
+   // keep again later it will result in broken deps
+   if(state.Delete() && state.RemoveReason = Unused) 
+   {
+      if(ver==candver)
+        mark_install(pkg, false, false, NULL);
+      else if(ver==pkg.CurrentVer())
+        MarkKeep(pkg, false, false);
+      
+      instver=state.InstVerIter(*this);
+   }
+#endif
+
+   // Ignore versions other than the InstVer, and ignore packages
+   // that are already going to be removed or just left uninstalled.
+   if(!(ver == instver && !instver.end()))
+      return;
+
+   // if we are marked already we are done
+   if(state.Marked)
+      return;
+
+   //std::cout << "Setting Marked for: " << pkg.Name() << std::endl;
+   state.Marked=true;
+
+   if(!ver.end())
+   {
+     for(DepIterator d = ver.DependsList(); !d.end(); ++d)
+     {
+       if(d->Type == Dep::Depends ||
+          d->Type == Dep::PreDepends ||
+          (follow_recommends &&
+           d->Type == Dep::Recommends) ||
+          (follow_suggests &&
+           d->Type == Dep::Suggests))
+        {
+          // Try all versions of this package.
+          for(VerIterator V = d.TargetPkg().VersionList(); 
+              !V.end(); ++V)
+          {
+             if(_system->VS->CheckDep(V.VerStr(), d->CompareOp, d.TargetVer()))
+             {
+                MarkPackage(V.ParentPkg(), V, 
+                            follow_recommends, follow_suggests);
+             }
+          }
+          // Now try virtual packages
+          for(PrvIterator prv=d.TargetPkg().ProvidesList(); 
+              !prv.end(); ++prv)
+          {
+             if(_system->VS->CheckDep(prv.ProvideVersion(), d->CompareOp, 
+                                      d.TargetVer()))
+             {
+                MarkPackage(prv.OwnerPkg(), prv.OwnerVer(),
+                            follow_recommends, follow_suggests);
+             }
+          }
+       }
+     }
+   }
+}
+
+bool pkgDepCache::Sweep()
+{
+   // do the sweep
+   for(PkgIterator p=PkgBegin(); !p.end(); ++p)
+  {
+     StateCache &state=PkgState[p->ID];
+
+     // if it is not marked and it is installed, it's garbage 
+     if(!state.Marked && (!p.CurrentVer().end() || state.Install()) &&
+       !state.Delete())
+     {
+       state.Garbage=true;
+       if(_config->FindB("Debug::pkgAutoRemove",false))
+          std::cout << "Garbage: " << p.Name() << std::endl;
+     }
+  }   
+
+   return true;
+}