]> git.saurik.com Git - apt.git/blobdiff - apt-pkg/acquire-item.cc
add c++11 override marker to overridden methods
[apt.git] / apt-pkg / acquire-item.cc
index 05ea9c0694902d13dadde571f7a096461400d5aa..864b9318819fce5f4b29b6ae2d4e06ac958ec5b9 100644 (file)
 #include <apt-pkg/fileutl.h>
 #include <apt-pkg/sha1.h>
 #include <apt-pkg/tagfile.h>
-#include <apt-pkg/indexrecords.h>
+#include <apt-pkg/metaindex.h>
 #include <apt-pkg/acquire.h>
 #include <apt-pkg/hashes.h>
 #include <apt-pkg/indexfile.h>
 #include <apt-pkg/pkgcache.h>
 #include <apt-pkg/cacheiterators.h>
 #include <apt-pkg/pkgrecords.h>
+#include <apt-pkg/gpgv.h>
 
 #include <stddef.h>
 #include <stdlib.h>
@@ -79,18 +80,18 @@ static std::string GetFinalFileNameFromURI(std::string const &uri)  /*{{{*/
    return _config->FindDir("Dir::State::lists") + URItoFileName(uri);
 }
                                                                        /*}}}*/
-static std::string GetCompressedFileName(std::string const &URI, std::string const &Name, std::string const &Ext) /*{{{*/
+static std::string GetCompressedFileName(IndexTarget const &Target, std::string const &Name, std::string const &Ext) /*{{{*/
 {
    if (Ext.empty() || Ext == "uncompressed")
       return Name;
 
    // do not reverify cdrom sources as apt-cdrom may rewrite the Packages
    // file when its doing the indexcopy
-   if (URI.substr(0,6) == "cdrom:")
+   if (Target.URI.substr(0,6) == "cdrom:")
       return Name;
 
    // adjust DestFile if its compressed on disk
-   if (_config->FindB("Acquire::GzipIndexes",false) == true)
+   if (Target.KeepCompressed == true)
       return Name + '.' + Ext;
    return Name;
 }
@@ -108,9 +109,9 @@ static std::string GetDiffsPatchFileName(std::string const &Final)  /*{{{*/
 }
                                                                        /*}}}*/
 
-static bool AllowInsecureRepositories(indexRecords const * const MetaIndexParser, pkgAcqMetaBase * const TransactionManager, pkgAcquire::Item * const I) /*{{{*/
+static bool AllowInsecureRepositories(metaIndex const * const MetaIndexParser, pkgAcqMetaClearSig * const TransactionManager, pkgAcquire::Item * const I) /*{{{*/
 {
-   if(MetaIndexParser->IsAlwaysTrusted() || _config->FindB("Acquire::AllowInsecureRepositories") == true)
+   if(MetaIndexParser->GetTrusted() == metaIndex::TRI_YES || _config->FindB("Acquire::AllowInsecureRepositories") == true)
       return true;
 
    _error->Error(_("Use --allow-insecure-repositories to force the update"));
@@ -119,11 +120,11 @@ static bool AllowInsecureRepositories(indexRecords const * const MetaIndexParser
    return false;
 }
                                                                        /*}}}*/
-static HashStringList GetExpectedHashesFromFor(indexRecords * const Parser, std::string const MetaKey)/*{{{*/
+static HashStringList GetExpectedHashesFromFor(metaIndex * const Parser, std::string const &MetaKey)/*{{{*/
 {
    if (Parser == NULL)
       return HashStringList();
-   indexRecords::checkSum * const R = Parser->Lookup(MetaKey);
+   metaIndex::checkSum * const R = Parser->Lookup(MetaKey);
    if (R == NULL)
       return HashStringList();
    return R->Hashes;
@@ -143,7 +144,8 @@ APT_CONST bool pkgAcqTransactionItem::HashesRequired() const
       we can at least trust them for integrity of the download itself.
       Only repositories without a Release file can (obviously) not have
       hashes – and they are very uncommon and strongly discouraged */
-   return TransactionManager->MetaIndexParser != NULL;
+   return TransactionManager->MetaIndexParser != NULL &&
+      TransactionManager->MetaIndexParser->GetLoadedSuccessfully() != metaIndex::TRI_UNSET;
 }
 HashStringList pkgAcqTransactionItem::GetExpectedHashes() const
 {
@@ -267,7 +269,7 @@ std::string pkgAcqDiffIndex::GetFinalFilename() const
 std::string pkgAcqIndex::GetFinalFilename() const
 {
    std::string const FinalFile = GetFinalFileNameFromURI(Target.URI);
-   return GetCompressedFileName(Target.URI, FinalFile, CurrentCompressionExtension);
+   return GetCompressedFileName(Target, FinalFile, CurrentCompressionExtension);
 }
 std::string pkgAcqMetaSig::GetFinalFilename() const
 {
@@ -382,15 +384,6 @@ bool pkgAcqDiffIndex::TransactionState(TransactionStates const state)
 }
                                                                        /*}}}*/
 
-// IndexTarget - Constructor                                           /*{{{*/
-IndexTarget::IndexTarget(std::string const &MetaKey, std::string const &ShortDesc,
-      std::string const &LongDesc, std::string const &URI, bool const IsOptional,
-      std::map<std::string, std::string> const &Options) :
-   URI(URI), Description(LongDesc), ShortDesc(ShortDesc), MetaKey(MetaKey), IsOptional(IsOptional), Options(Options)
-{
-}
-                                                                       /*}}}*/
-
 class APT_HIDDEN NoActionItem : public pkgAcquire::Item                        /*{{{*/
 /* The sole purpose of this class is having an item which does nothing to
    reach its done state to prevent cleanup deleting the mentioned file.
@@ -398,10 +391,10 @@ class APT_HIDDEN NoActionItem : public pkgAcquire::Item                   /*{{{*/
 {
    IndexTarget const Target;
    public:
-   virtual std::string DescURI() const {return Target.URI;};
-   virtual HashStringList GetExpectedHashes()  const {return HashStringList();};
+   virtual std::string DescURI() const APT_OVERRIDE {return Target.URI;};
+   virtual HashStringList GetExpectedHashes()  const APT_OVERRIDE {return HashStringList();};
 
-   NoActionItem(pkgAcquire * const Owner, IndexTarget const Target) :
+   NoActionItem(pkgAcquire * const Owner, IndexTarget const &Target) :
       pkgAcquire::Item(Owner), Target(Target)
    {
       Status = StatDone;
@@ -412,9 +405,9 @@ class APT_HIDDEN NoActionItem : public pkgAcquire::Item                     /*{{{*/
 
 // Acquire::Item::Item - Constructor                                   /*{{{*/
 APT_IGNORE_DEPRECATED_PUSH
-pkgAcquire::Item::Item(pkgAcquire * const Owner) :
-   FileSize(0), PartialSize(0), Mode(0), Complete(false), Local(false),
-    QueueCounter(0), ExpectedAdditionalItems(0), Owner(Owner)
+pkgAcquire::Item::Item(pkgAcquire * const owner) :
+   FileSize(0), PartialSize(0), Mode(0), ID(0), Complete(false), Local(false),
+    QueueCounter(0), ExpectedAdditionalItems(0), Owner(owner), d(NULL)
 {
    Owner->Add(this);
    Status = StatIdle;
@@ -446,6 +439,11 @@ APT_PURE pkgAcquire * pkgAcquire::Item::GetOwner() const           /*{{{*/
    return Owner;
 }
                                                                        /*}}}*/
+APT_CONST pkgAcquire::ItemDesc &pkgAcquire::Item::GetItemDesc()                /*{{{*/
+{
+   return Desc;
+}
+                                                                       /*}}}*/
 APT_CONST bool pkgAcquire::Item::IsTrusted() const                     /*{{{*/
 {
    return false;
@@ -522,19 +520,14 @@ void pkgAcquire::Item::Done(string const &Message, HashStringList const &Hashes,
                            pkgAcquire::MethodConfig const * const /*Cnf*/)
 {
    // We just downloaded something..
-   string FileName = LookupTag(Message,"Filename");
    UsedMirror = LookupTag(Message,"UsedMirror");
-   unsigned long long const downloadedSize = Hashes.FileSize();
-   if (downloadedSize != 0)
+   if (FileSize == 0)
    {
-      if (Complete == false && !Local && FileName == DestFile)
+      unsigned long long const downloadedSize = Hashes.FileSize();
+      if (downloadedSize != 0)
       {
-        if (Owner->Log != 0)
-           Owner->Log->Fetched(Hashes.FileSize(),atoi(LookupTag(Message,"Resume-Point","0").c_str()));
+        FileSize = downloadedSize;
       }
-
-      if (FileSize == 0)
-        FileSize= downloadedSize;
    }
    Status = StatDone;
    ErrorText = string();
@@ -669,8 +662,8 @@ std::string pkgAcquire::Item::HashSum() const                               /*{{{*/
                                                                        /*}}}*/
 
 pkgAcqTransactionItem::pkgAcqTransactionItem(pkgAcquire * const Owner, /*{{{*/
-      pkgAcqMetaBase * const TransactionManager, IndexTarget const Target) :
-   pkgAcquire::Item(Owner), Target(Target), TransactionManager(TransactionManager)
+      pkgAcqMetaClearSig * const transactionManager, IndexTarget const &target) :
+   pkgAcquire::Item(Owner), d(NULL), Target(target), TransactionManager(transactionManager)
 {
    if (TransactionManager != this)
       TransactionManager->Add(this);
@@ -680,7 +673,7 @@ pkgAcqTransactionItem::~pkgAcqTransactionItem()                             /*{{{*/
 {
 }
                                                                        /*}}}*/
-HashStringList pkgAcqTransactionItem::GetExpectedHashesFor(std::string const MetaKey) const    /*{{{*/
+HashStringList pkgAcqTransactionItem::GetExpectedHashesFor(std::string const &MetaKey) const   /*{{{*/
 {
    return GetExpectedHashesFromFor(TransactionManager->MetaIndexParser, MetaKey);
 }
@@ -688,12 +681,11 @@ HashStringList pkgAcqTransactionItem::GetExpectedHashesFor(std::string const Met
 
 // AcqMetaBase - Constructor                                           /*{{{*/
 pkgAcqMetaBase::pkgAcqMetaBase(pkgAcquire * const Owner,
-      pkgAcqMetaBase * const TransactionManager,
-      std::vector<IndexTarget> const IndexTargets,
-      IndexTarget const &DataTarget,
-      indexRecords * const MetaIndexParser)
-: pkgAcqTransactionItem(Owner, TransactionManager, DataTarget),
-   MetaIndexParser(MetaIndexParser), LastMetaIndexParser(NULL), IndexTargets(IndexTargets),
+      pkgAcqMetaClearSig * const TransactionManager,
+      std::vector<IndexTarget> const &IndexTargets,
+      IndexTarget const &DataTarget)
+: pkgAcqTransactionItem(Owner, TransactionManager, DataTarget), d(NULL),
+   IndexTargets(IndexTargets),
    AuthPass(false), IMSHit(false)
 {
 }
@@ -816,7 +808,6 @@ string pkgAcqMetaBase::Custom600Headers() const
    Header += MaximumSize;
 
    string const FinalFile = GetFinalFilename();
-
    struct stat Buf;
    if (stat(FinalFile.c_str(),&Buf) == 0)
       Header += "\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
@@ -848,7 +839,7 @@ bool pkgAcqMetaBase::CheckDownloadDone(pkgAcqTransactionItem * const I, const st
       return false;
    }
 
-   if (FileName != I->DestFile)
+   if (FileName != I->DestFile && RealFileExists(I->DestFile) == false)
    {
       I->Local = true;
       I->Desc.URI = "copy:" + FileName;
@@ -909,26 +900,28 @@ bool pkgAcqMetaBase::CheckAuthDone(string const &Message)         /*{{{*/
       }
       if (RealFileExists(FinalInRelease) || RealFileExists(FinalRelease))
       {
-        TransactionManager->LastMetaIndexParser = new indexRecords;
-        _error->PushToStack();
-        if (RealFileExists(FinalInRelease))
-           TransactionManager->LastMetaIndexParser->Load(FinalInRelease);
-        else
-           TransactionManager->LastMetaIndexParser->Load(FinalRelease);
-        // its unlikely to happen, but if what we have is bad ignore it
-        if (_error->PendingError())
+        TransactionManager->LastMetaIndexParser = TransactionManager->MetaIndexParser->UnloadedClone();
+        if (TransactionManager->LastMetaIndexParser != NULL)
         {
-           delete TransactionManager->LastMetaIndexParser;
-           TransactionManager->LastMetaIndexParser = NULL;
+           _error->PushToStack();
+           if (RealFileExists(FinalInRelease))
+              TransactionManager->LastMetaIndexParser->Load(FinalInRelease, NULL);
+           else
+              TransactionManager->LastMetaIndexParser->Load(FinalRelease, NULL);
+           // its unlikely to happen, but if what we have is bad ignore it
+           if (_error->PendingError())
+           {
+              delete TransactionManager->LastMetaIndexParser;
+              TransactionManager->LastMetaIndexParser = NULL;
+           }
+           _error->RevertToStack();
         }
-        _error->RevertToStack();
       }
    }
 
-   if (TransactionManager->MetaIndexParser->Load(DestFile) == false)
+   if (TransactionManager->MetaIndexParser->Load(DestFile, &ErrorText) == false)
    {
       Status = StatAuthError;
-      ErrorText = TransactionManager->MetaIndexParser->ErrorText;
       return false;
    }
 
@@ -1047,15 +1040,15 @@ bool pkgAcqMetaBase::VerifyVendor(string const &Message)                /*{{{*/
       Transformed = "";
    }
 
-   if (_config->FindB("Acquire::Check-Valid-Until", true) == true &&
-       TransactionManager->MetaIndexParser->GetValidUntil() > 0) {
+   if (TransactionManager->MetaIndexParser->GetValidUntil() > 0)
+   {
       time_t const invalid_since = time(NULL) - TransactionManager->MetaIndexParser->GetValidUntil();
       if (invalid_since > 0)
       {
         std::string errmsg;
         strprintf(errmsg,
               // TRANSLATOR: The first %s is the URL of the bad Release file, the second is
-              // the time since then the file is invalid - formated in the same way as in
+              // the time since then the file is invalid - formatted in the same way as in
               // the download progress display (e.g. 7d 3h 42min 1s)
               _("Release file for %s is expired (invalid since %s). "
                  "Updates for this repository will not be applied."),
@@ -1074,14 +1067,16 @@ bool pkgAcqMetaBase::VerifyVendor(string const &Message)                /*{{{*/
       TransactionManager->IMSHit = true;
       unlink(DestFile.c_str());
       PartialFile = DestFile = GetFinalFilename();
-      delete TransactionManager->MetaIndexParser;
-      TransactionManager->MetaIndexParser = TransactionManager->LastMetaIndexParser;
+      // load the 'old' file in the 'new' one instead of flipping pointers as
+      // the new one isn't owned by us, while the old one is so cleanup would be confused.
+      TransactionManager->MetaIndexParser->swapLoad(TransactionManager->LastMetaIndexParser);
+      delete TransactionManager->LastMetaIndexParser;
       TransactionManager->LastMetaIndexParser = NULL;
    }
 
    if (_config->FindB("Debug::pkgAcquire::Auth", false)) 
    {
-      std::cerr << "Got Codename: " << TransactionManager->MetaIndexParser->GetDist() << std::endl;
+      std::cerr << "Got Codename: " << TransactionManager->MetaIndexParser->GetCodename() << std::endl;
       std::cerr << "Expecting Dist: " << TransactionManager->MetaIndexParser->GetExpectedDist() << std::endl;
       std::cerr << "Transformed Dist: " << Transformed << std::endl;
    }
@@ -1092,29 +1087,33 @@ bool pkgAcqMetaBase::VerifyVendor(string const &Message)                /*{{{*/
 //       Status = StatAuthError;
 //       ErrorText = "Conflicting distribution; expected "
 //          + MetaIndexParser->GetExpectedDist() + " but got "
-//          + MetaIndexParser->GetDist();
+//          + MetaIndexParser->GetCodename();
 //       return false;
       if (!Transformed.empty())
       {
          _error->Warning(_("Conflicting distribution: %s (expected %s but got %s)"),
                          Desc.Description.c_str(),
                          Transformed.c_str(),
-                         TransactionManager->MetaIndexParser->GetDist().c_str());
+                         TransactionManager->MetaIndexParser->GetCodename().c_str());
       }
    }
 
    return true;
 }
                                                                        /*}}}*/
+pkgAcqMetaBase::~pkgAcqMetaBase()
+{
+}
 
 pkgAcqMetaClearSig::pkgAcqMetaClearSig(pkgAcquire * const Owner,       /*{{{*/
       IndexTarget const &ClearsignedTarget,
       IndexTarget const &DetachedDataTarget, IndexTarget const &DetachedSigTarget,
-      std::vector<IndexTarget> const IndexTargets,
-      indexRecords * const MetaIndexParser) :
-   pkgAcqMetaIndex(Owner, this, ClearsignedTarget, DetachedSigTarget, IndexTargets, MetaIndexParser),
-   ClearsignedTarget(ClearsignedTarget),
-   DetachedDataTarget(DetachedDataTarget), DetachedSigTarget(DetachedSigTarget)
+      std::vector<IndexTarget> const &IndexTargets,
+      metaIndex * const MetaIndexParser) :
+   pkgAcqMetaIndex(Owner, this, ClearsignedTarget, DetachedSigTarget, IndexTargets),
+   d(NULL), ClearsignedTarget(ClearsignedTarget),
+   DetachedDataTarget(DetachedDataTarget),
+   MetaIndexParser(MetaIndexParser), LastMetaIndexParser(NULL)
 {
    // index targets + (worst case:) Release/Release.gpg
    ExpectedAdditionalItems = IndexTargets.size() + 2;
@@ -1123,6 +1122,8 @@ pkgAcqMetaClearSig::pkgAcqMetaClearSig(pkgAcquire * const Owner,  /*{{{*/
                                                                        /*}}}*/
 pkgAcqMetaClearSig::~pkgAcqMetaClearSig()                              /*{{{*/
 {
+   if (LastMetaIndexParser != NULL)
+      delete LastMetaIndexParser;
 }
                                                                        /*}}}*/
 // pkgAcqMetaClearSig::Custom600Headers - Insert custom request headers        /*{{{*/
@@ -1130,6 +1131,10 @@ string pkgAcqMetaClearSig::Custom600Headers() const
 {
    string Header = pkgAcqMetaBase::Custom600Headers();
    Header += "\nFail-Ignore: true";
+   std::string const key = TransactionManager->MetaIndexParser->GetSignedBy();
+   if (key.empty() == false)
+      Header += "\nSigned-By: " + key;
+
    return Header;
 }
                                                                        /*}}}*/
@@ -1187,7 +1192,7 @@ void pkgAcqMetaClearSig::Failed(string const &Message,pkgAcquire::MethodConfig c
       TransactionManager->TransactionStageRemoval(this, GetFinalFilename());
       Status = StatDone;
 
-      new pkgAcqMetaIndex(Owner, TransactionManager, DetachedDataTarget, DetachedSigTarget, IndexTargets, TransactionManager->MetaIndexParser);
+      new pkgAcqMetaIndex(Owner, TransactionManager, DetachedDataTarget, DetachedSigTarget, IndexTargets);
    }
    else
    {
@@ -1219,25 +1224,28 @@ void pkgAcqMetaClearSig::Failed(string const &Message,pkgAcquire::MethodConfig c
            // open the last Release if we have it
            if (TransactionManager->IMSHit == false)
            {
-              TransactionManager->LastMetaIndexParser = new indexRecords;
-              _error->PushToStack();
-              if (RealFileExists(FinalInRelease))
-                 TransactionManager->LastMetaIndexParser->Load(FinalInRelease);
-              else
-                 TransactionManager->LastMetaIndexParser->Load(FinalRelease);
-              // its unlikely to happen, but if what we have is bad ignore it
-              if (_error->PendingError())
+              TransactionManager->LastMetaIndexParser = TransactionManager->MetaIndexParser->UnloadedClone();
+              if (TransactionManager->LastMetaIndexParser != NULL)
               {
-                 delete TransactionManager->LastMetaIndexParser;
-                 TransactionManager->LastMetaIndexParser = NULL;
+                 _error->PushToStack();
+                 if (RealFileExists(FinalInRelease))
+                    TransactionManager->LastMetaIndexParser->Load(FinalInRelease, NULL);
+                 else
+                    TransactionManager->LastMetaIndexParser->Load(FinalRelease, NULL);
+                 // its unlikely to happen, but if what we have is bad ignore it
+                 if (_error->PendingError())
+                 {
+                    delete TransactionManager->LastMetaIndexParser;
+                    TransactionManager->LastMetaIndexParser = NULL;
+                 }
+                 _error->RevertToStack();
               }
-              _error->RevertToStack();
            }
         }
 
         // we parse the indexes here because at this point the user wanted
         // a repository that may potentially harm him
-        if (TransactionManager->MetaIndexParser->Load(PartialRelease) == false || VerifyVendor(Message) == false)
+        if (TransactionManager->MetaIndexParser->Load(PartialRelease, &ErrorText) == false || VerifyVendor(Message) == false)
            /* expired Release files are still a problem you need extra force for */;
         else
            QueueIndexes(true);
@@ -1247,12 +1255,11 @@ void pkgAcqMetaClearSig::Failed(string const &Message,pkgAcquire::MethodConfig c
                                                                        /*}}}*/
 
 pkgAcqMetaIndex::pkgAcqMetaIndex(pkgAcquire * const Owner,             /*{{{*/
-                                 pkgAcqMetaBase * const TransactionManager,
+                                 pkgAcqMetaClearSig * const TransactionManager,
                                 IndexTarget const &DataTarget,
                                 IndexTarget const &DetachedSigTarget,
-                                vector<IndexTarget> const IndexTargets,
-                                indexRecords * const MetaIndexParser) :
-   pkgAcqMetaBase(Owner, TransactionManager, IndexTargets, DataTarget, MetaIndexParser),
+                                vector<IndexTarget> const &IndexTargets) :
+   pkgAcqMetaBase(Owner, TransactionManager, IndexTargets, DataTarget), d(NULL),
    DetachedSigTarget(DetachedSigTarget)
 {
    if(_config->FindB("Debug::Acquire::Transaction", false) == true)
@@ -1305,8 +1312,6 @@ void pkgAcqMetaIndex::Failed(string const &Message,
    {
       // ensure old Release files are removed
       TransactionManager->TransactionStageRemoval(this, GetFinalFilename());
-      delete TransactionManager->MetaIndexParser;
-      TransactionManager->MetaIndexParser = NULL;
 
       // queue without any kind of hashsum support
       QueueIndexes(false);
@@ -1327,13 +1332,14 @@ std::string pkgAcqMetaIndex::DescURI() const                            /*{{{*/
    return Target.URI;
 }
                                                                        /*}}}*/
+pkgAcqMetaIndex::~pkgAcqMetaIndex() {}
 
 // AcqMetaSig::AcqMetaSig - Constructor                                        /*{{{*/
 pkgAcqMetaSig::pkgAcqMetaSig(pkgAcquire * const Owner,
-      pkgAcqMetaBase * const TransactionManager,
-      IndexTarget const Target,
+      pkgAcqMetaClearSig * const TransactionManager,
+      IndexTarget const &Target,
       pkgAcqMetaIndex * const MetaIndex) :
-   pkgAcqTransactionItem(Owner, TransactionManager, Target), MetaIndex(MetaIndex)
+   pkgAcqTransactionItem(Owner, TransactionManager, Target), d(NULL), MetaIndex(MetaIndex)
 {
    DestFile = GetPartialFileNameFromURI(Target.URI);
 
@@ -1369,6 +1375,16 @@ pkgAcqMetaSig::pkgAcqMetaSig(pkgAcquire * const Owner,
                                                                        /*}}}*/
 pkgAcqMetaSig::~pkgAcqMetaSig()                                                /*{{{*/
 {
+}
+                                                                       /*}}}*/
+// pkgAcqMetaSig::Custom600Headers - Insert custom request headers     /*{{{*/
+std::string pkgAcqMetaSig::Custom600Headers() const
+{
+   std::string Header = pkgAcqTransactionItem::Custom600Headers();
+   std::string const key = TransactionManager->MetaIndexParser->GetSignedBy();
+   if (key.empty() == false)
+      Header += "\nSigned-By: " + key;
+   return Header;
 }
                                                                        /*}}}*/
 // AcqMetaSig::Done - The signature was downloaded/verified            /*{{{*/
@@ -1454,25 +1470,28 @@ void pkgAcqMetaSig::Failed(string const &Message,pkgAcquire::MethodConfig const
         // open the last Release if we have it
         if (TransactionManager->IMSHit == false)
         {
-           TransactionManager->LastMetaIndexParser = new indexRecords;
-           _error->PushToStack();
-           if (RealFileExists(FinalInRelease))
-              TransactionManager->LastMetaIndexParser->Load(FinalInRelease);
-           else
-              TransactionManager->LastMetaIndexParser->Load(FinalRelease);
-           // its unlikely to happen, but if what we have is bad ignore it
-           if (_error->PendingError())
+           TransactionManager->LastMetaIndexParser = TransactionManager->MetaIndexParser->UnloadedClone();
+           if (TransactionManager->LastMetaIndexParser != NULL)
            {
-              delete TransactionManager->LastMetaIndexParser;
-              TransactionManager->LastMetaIndexParser = NULL;
+              _error->PushToStack();
+              if (RealFileExists(FinalInRelease))
+                 TransactionManager->LastMetaIndexParser->Load(FinalInRelease, NULL);
+              else
+                 TransactionManager->LastMetaIndexParser->Load(FinalRelease, NULL);
+              // its unlikely to happen, but if what we have is bad ignore it
+              if (_error->PendingError())
+              {
+                 delete TransactionManager->LastMetaIndexParser;
+                 TransactionManager->LastMetaIndexParser = NULL;
+              }
+              _error->RevertToStack();
            }
-           _error->RevertToStack();
         }
       }
 
       // we parse the indexes here because at this point the user wanted
       // a repository that may potentially harm him
-      if (TransactionManager->MetaIndexParser->Load(MetaIndex->DestFile) == false || MetaIndex->VerifyVendor(Message) == false)
+      if (TransactionManager->MetaIndexParser->Load(MetaIndex->DestFile, &ErrorText) == false || MetaIndex->VerifyVendor(Message) == false)
         /* expired Release files are still a problem you need extra force for */;
       else
         MetaIndex->QueueIndexes(true);
@@ -1493,12 +1512,13 @@ void pkgAcqMetaSig::Failed(string const &Message,pkgAcquire::MethodConfig const
 
 // AcqBaseIndex - Constructor                                          /*{{{*/
 pkgAcqBaseIndex::pkgAcqBaseIndex(pkgAcquire * const Owner,
-      pkgAcqMetaBase * const TransactionManager,
-      IndexTarget const Target)
-: pkgAcqTransactionItem(Owner, TransactionManager, Target)
+      pkgAcqMetaClearSig * const TransactionManager,
+      IndexTarget const &Target)
+: pkgAcqTransactionItem(Owner, TransactionManager, Target), d(NULL)
 {
 }
                                                                        /*}}}*/
+pkgAcqBaseIndex::~pkgAcqBaseIndex() {}
 
 // AcqDiffIndex::AcqDiffIndex - Constructor                            /*{{{*/
 // ---------------------------------------------------------------------
@@ -1508,9 +1528,9 @@ pkgAcqBaseIndex::pkgAcqBaseIndex(pkgAcquire * const Owner,
  * the original packages file
  */
 pkgAcqDiffIndex::pkgAcqDiffIndex(pkgAcquire * const Owner,
-                                 pkgAcqMetaBase * const TransactionManager,
-                                 IndexTarget const Target)
-   : pkgAcqBaseIndex(Owner, TransactionManager, Target)
+                                 pkgAcqMetaClearSig * const TransactionManager,
+                                 IndexTarget const &Target)
+   : pkgAcqBaseIndex(Owner, TransactionManager, Target), d(NULL), diffs(NULL)
 {
    Debug = _config->FindB("Debug::pkgAcquire::Diffs",false);
 
@@ -1845,7 +1865,7 @@ bool pkgAcqDiffIndex::ParseDiffIndex(string const &IndexDiffFile) /*{{{*/
       new pkgAcqIndexDiffs(Owner, TransactionManager, Target, available_patches);
    else
    {
-      std::vector<pkgAcqIndexMergeDiffs*> *diffs = new std::vector<pkgAcqIndexMergeDiffs*>(available_patches.size());
+      diffs = new std::vector<pkgAcqIndexMergeDiffs*>(available_patches.size());
       for(size_t i = 0; i < available_patches.size(); ++i)
         (*diffs)[i] = new pkgAcqIndexMergeDiffs(Owner, TransactionManager,
                Target,
@@ -1901,6 +1921,11 @@ void pkgAcqDiffIndex::Done(string const &Message,HashStringList const &Hashes,   /
    return;
 }
                                                                        /*}}}*/
+pkgAcqDiffIndex::~pkgAcqDiffIndex()
+{
+   if (diffs != NULL)
+      delete diffs;
+}
 
 // AcqIndexDiffs::AcqIndexDiffs - Constructor                          /*{{{*/
 // ---------------------------------------------------------------------
@@ -1908,10 +1933,10 @@ void pkgAcqDiffIndex::Done(string const &Message,HashStringList const &Hashes,  /
  * for each diff and the index
  */
 pkgAcqIndexDiffs::pkgAcqIndexDiffs(pkgAcquire * const Owner,
-                                   pkgAcqMetaBase * const TransactionManager,
-                                   IndexTarget const Target,
+                                   pkgAcqMetaClearSig * const TransactionManager,
+                                   IndexTarget const &Target,
                                   vector<DiffInfo> const &diffs)
-   : pkgAcqBaseIndex(Owner, TransactionManager, Target),
+   : pkgAcqBaseIndex(Owner, TransactionManager, Target), d(NULL),
      available_patches(diffs)
 {
    DestFile = GetPartialFileNameFromURI(Target.URI);
@@ -2127,14 +2152,15 @@ std::string pkgAcqIndexDiffs::Custom600Headers() const                  /*{{{*/
    return patchhashes.str();
 }
                                                                        /*}}}*/
+pkgAcqIndexDiffs::~pkgAcqIndexDiffs() {}
 
 // AcqIndexMergeDiffs::AcqIndexMergeDiffs - Constructor                        /*{{{*/
 pkgAcqIndexMergeDiffs::pkgAcqIndexMergeDiffs(pkgAcquire * const Owner,
-                                             pkgAcqMetaBase * const TransactionManager,
-                                             IndexTarget const Target,
+                                             pkgAcqMetaClearSig * const TransactionManager,
+                                             IndexTarget const &Target,
                                              DiffInfo const &patch,
                                              std::vector<pkgAcqIndexMergeDiffs*> const * const allPatches)
-  : pkgAcqBaseIndex(Owner, TransactionManager, Target),
+  : pkgAcqBaseIndex(Owner, TransactionManager, Target), d(NULL),
      patch(patch), allPatches(allPatches), State(StateFetchDiff)
 {
    Debug = _config->FindB("Debug::pkgAcquire::Diffs",false);
@@ -2271,12 +2297,13 @@ std::string pkgAcqIndexMergeDiffs::Custom600Headers() const             /*{{{*/
    return patchhashes.str();
 }
                                                                        /*}}}*/
+pkgAcqIndexMergeDiffs::~pkgAcqIndexMergeDiffs() {}
 
 // AcqIndex::AcqIndex - Constructor                                    /*{{{*/
 pkgAcqIndex::pkgAcqIndex(pkgAcquire * const Owner,
-                         pkgAcqMetaBase * const TransactionManager,
-                         IndexTarget const Target)
-   : pkgAcqBaseIndex(Owner, TransactionManager, Target)
+                         pkgAcqMetaClearSig * const TransactionManager,
+                         IndexTarget const &Target)
+   : pkgAcqBaseIndex(Owner, TransactionManager, Target), d(NULL), Stage(STAGE_DOWNLOAD)
 {
    // autoselect the compression method
    AutoSelectCompression();
@@ -2429,7 +2456,7 @@ void pkgAcqIndex::ReverifyAfterIMS()
 {
    // update destfile to *not* include the compression extension when doing
    // a reverify (as its uncompressed on disk already)
-   DestFile = GetCompressedFileName(Target.URI, GetPartialFileNameFromURI(Target.URI), CurrentCompressionExtension);
+   DestFile = GetCompressedFileName(Target, GetPartialFileNameFromURI(Target.URI), CurrentCompressionExtension);
 
    // copy FinalFile into partial/ so that we check the hash again
    string FinalFile = GetFinalFilename();
@@ -2490,7 +2517,7 @@ void pkgAcqIndex::StageDownloadDone(string const &Message, HashStringList const
 
    // Methods like e.g. "file:" will give us a (compressed) FileName that is
    // not the "DestFile" we set, in this case we uncompress from the local file
-   if (FileName != DestFile)
+   if (FileName != DestFile && RealFileExists(DestFile) == false)
       Local = true;
    else
       EraseFileName = FileName;
@@ -2505,8 +2532,8 @@ void pkgAcqIndex::StageDownloadDone(string const &Message, HashStringList const
       return;
    }
 
-   // If we have compressed indexes enabled, queue for hash verification
-   if (_config->FindB("Acquire::GzipIndexes",false))
+   // If we want compressed indexes, just copy in place for hash verification
+   if (Target.KeepCompressed == true)
    {
       DestFile = GetPartialFileNameFromURI(Target.URI + '.' + CurrentCompressionExtension);
       EraseFileName = "";
@@ -2547,6 +2574,7 @@ void pkgAcqIndex::StageDecompressDone(string const &,
    return;
 }
                                                                        /*}}}*/
+pkgAcqIndex::~pkgAcqIndex() {}
 
 
 // AcqArchive::AcqArchive - Constructor                                        /*{{{*/
@@ -2556,7 +2584,7 @@ void pkgAcqIndex::StageDecompressDone(string const &,
 pkgAcqArchive::pkgAcqArchive(pkgAcquire * const Owner,pkgSourceList * const Sources,
                             pkgRecords * const Recs,pkgCache::VerIterator const &Version,
                             string &StoreFilename) :
-               Item(Owner), LocalSource(false), Version(Version), Sources(Sources), Recs(Recs),
+               Item(Owner), d(NULL), LocalSource(false), Version(Version), Sources(Sources), Recs(Recs),
                StoreFilename(StoreFilename), Vf(Version.FileList()),
               Trusted(false)
 {
@@ -2577,7 +2605,7 @@ pkgAcqArchive::pkgAcqArchive(pkgAcquire * const Owner,pkgSourceList * const Sour
    // Skip not source sources, they do not have file fields.
    for (; Vf.end() == false; ++Vf)
    {
-      if ((Vf.File()->Flags & pkgCache::Flag::NotSource) != 0)
+      if (Vf.File().Flagged(pkgCache::Flag::NotSource))
         continue;
       break;
    }
@@ -2645,14 +2673,14 @@ bool pkgAcqArchive::QueueNext()
    {
       pkgCache::PkgFileIterator const PkgF = Vf.File();
       // Ignore not source sources
-      if ((PkgF->Flags & pkgCache::Flag::NotSource) != 0)
+      if (PkgF.Flagged(pkgCache::Flag::NotSource))
         continue;
 
       // Try to cross match against the source list
       pkgIndexFile *Index;
       if (Sources->FindIndex(PkgF, Index) == false)
            continue;
-      LocalSource = (PkgF->Flags & pkgCache::Flag::LocalSource) == pkgCache::Flag::LocalSource;
+      LocalSource = PkgF.Flagged(pkgCache::Flag::LocalSource);
 
       // only try to get a trusted package from another source if that source
       // is also trusted
@@ -2768,7 +2796,7 @@ void pkgAcqArchive::Done(string const &Message, HashStringList const &Hashes,
    }
 
    // Reference filename
-   if (FileName != DestFile)
+   if (DestFile !=  FileName && RealFileExists(DestFile) == false)
    {
       StoreFilename = DestFile = FileName;
       Local = true;
@@ -2844,13 +2872,212 @@ std::string pkgAcqArchive::ShortDesc() const                           /*{{{*/
    return Desc.ShortDesc;
 }
                                                                        /*}}}*/
+pkgAcqArchive::~pkgAcqArchive() {}
+
+// AcqChangelog::pkgAcqChangelog - Constructors                                /*{{{*/
+pkgAcqChangelog::pkgAcqChangelog(pkgAcquire * const Owner, pkgCache::VerIterator const &Ver,
+      std::string const &DestDir, std::string const &DestFilename) :
+   pkgAcquire::Item(Owner), d(NULL), SrcName(Ver.SourcePkgName()), SrcVersion(Ver.SourceVerStr())
+{
+   Desc.URI = URI(Ver);
+   Init(DestDir, DestFilename);
+}
+// some parameters are char* here as they come likely from char* interfaces – which can also return NULL
+pkgAcqChangelog::pkgAcqChangelog(pkgAcquire * const Owner, pkgCache::RlsFileIterator const &RlsFile,
+      char const * const Component, char const * const SrcName, char const * const SrcVersion,
+      const string &DestDir, const string &DestFilename) :
+   pkgAcquire::Item(Owner), d(NULL), SrcName(SrcName), SrcVersion(SrcVersion)
+{
+   Desc.URI = URI(RlsFile, Component, SrcName, SrcVersion);
+   Init(DestDir, DestFilename);
+}
+pkgAcqChangelog::pkgAcqChangelog(pkgAcquire * const Owner,
+      std::string const &URI, char const * const SrcName, char const * const SrcVersion,
+      const string &DestDir, const string &DestFilename) :
+   pkgAcquire::Item(Owner), d(NULL), SrcName(SrcName), SrcVersion(SrcVersion)
+{
+   Desc.URI = URI;
+   Init(DestDir, DestFilename);
+}
+void pkgAcqChangelog::Init(std::string const &DestDir, std::string const &DestFilename)
+{
+   if (Desc.URI.empty())
+   {
+      Status = StatError;
+      // TRANSLATOR: %s=%s is sourcename=sourceversion, e.g. apt=1.1
+      strprintf(ErrorText, _("Changelog unavailable for %s=%s"), SrcName.c_str(), SrcVersion.c_str());
+      // Let the error message print something sensible rather than "Failed to fetch /"
+      if (DestFilename.empty())
+        DestFile = SrcName + ".changelog";
+      else
+        DestFile = DestFilename;
+      Desc.URI = "changelog:/" + DestFile;
+      return;
+   }
+
+   if (DestDir.empty())
+   {
+      std::string const systemTemp = GetTempDir();
+      char tmpname[100];
+      snprintf(tmpname, sizeof(tmpname), "%s/apt-changelog-XXXXXX", systemTemp.c_str());
+      if (NULL == mkdtemp(tmpname))
+      {
+        _error->Errno("mkdtemp", "mkdtemp failed in changelog acquire of %s %s", SrcName.c_str(), SrcVersion.c_str());
+        Status = StatError;
+        return;
+      }
+      DestFile = TemporaryDirectory = tmpname;
+   }
+   else
+      DestFile = DestDir;
+
+   if (DestFilename.empty())
+      DestFile = flCombine(DestFile, SrcName + ".changelog");
+   else
+      DestFile = flCombine(DestFile, DestFilename);
+
+   Desc.ShortDesc = "Changelog";
+   strprintf(Desc.Description, "%s %s %s Changelog", URI::SiteOnly(Desc.URI).c_str(), SrcName.c_str(), SrcVersion.c_str());
+   Desc.Owner = this;
+   QueueURI(Desc);
+}
+                                                                       /*}}}*/
+std::string pkgAcqChangelog::URI(pkgCache::VerIterator const &Ver)     /*{{{*/
+{
+   char const * const SrcName = Ver.SourcePkgName();
+   char const * const SrcVersion = Ver.SourceVerStr();
+   pkgCache::PkgFileIterator PkgFile;
+   // find the first source for this version which promises a changelog
+   for (pkgCache::VerFileIterator VF = Ver.FileList(); VF.end() == false; ++VF)
+   {
+      pkgCache::PkgFileIterator const PF = VF.File();
+      if (PF.Flagged(pkgCache::Flag::NotSource) || PF->Release == 0)
+        continue;
+      PkgFile = PF;
+      pkgCache::RlsFileIterator const RF = PF.ReleaseFile();
+      std::string const uri = URI(RF, PF.Component(), SrcName, SrcVersion);
+      if (uri.empty())
+        continue;
+      return uri;
+   }
+   return "";
+}
+std::string pkgAcqChangelog::URITemplate(pkgCache::RlsFileIterator const &Rls)
+{
+   if (Rls.end() == true || (Rls->Label == 0 && Rls->Origin == 0))
+      return "";
+   std::string const serverConfig = "Acquire::Changelogs::URI";
+   std::string server;
+#define APT_EMPTY_SERVER \
+   if (server.empty() == false) \
+   { \
+      if (server != "no") \
+        return server; \
+      return ""; \
+   }
+#define APT_CHECK_SERVER(X, Y) \
+   if (Rls->X != 0) \
+   { \
+      std::string const specialServerConfig = serverConfig + "::" + Y + #X + "::" + Rls.X(); \
+      server = _config->Find(specialServerConfig); \
+      APT_EMPTY_SERVER \
+   }
+   // this way e.g. Debian-Security can fallback to Debian
+   APT_CHECK_SERVER(Label, "Override::")
+   APT_CHECK_SERVER(Origin, "Override::")
+
+   if (RealFileExists(Rls.FileName()))
+   {
+      _error->PushToStack();
+      FileFd rf;
+      /* This can be costly. A caller wanting to get millions of URIs might
+        want to do this on its own once and use Override settings.
+        We don't do this here as Origin/Label are not as unique as they
+        should be so this could produce request order-dependent anomalies */
+      if (OpenMaybeClearSignedFile(Rls.FileName(), rf) == true)
+      {
+        pkgTagFile TagFile(&rf, rf.Size());
+        pkgTagSection Section;
+        if (TagFile.Step(Section) == true)
+           server = Section.FindS("Changelogs");
+      }
+      _error->RevertToStack();
+      APT_EMPTY_SERVER
+   }
+
+   APT_CHECK_SERVER(Label, "")
+   APT_CHECK_SERVER(Origin, "")
+#undef APT_CHECK_SERVER
+#undef APT_EMPTY_SERVER
+   return "";
+}
+std::string pkgAcqChangelog::URI(pkgCache::RlsFileIterator const &Rls,
+        char const * const Component, char const * const SrcName,
+        char const * const SrcVersion)
+{
+   return URI(URITemplate(Rls), Component, SrcName, SrcVersion);
+}
+std::string pkgAcqChangelog::URI(std::string const &Template,
+        char const * const Component, char const * const SrcName,
+        char const * const SrcVersion)
+{
+   if (Template.find("CHANGEPATH") == std::string::npos)
+      return "";
+
+   // the path is: COMPONENT/SRC/SRCNAME/SRCNAME_SRCVER, e.g. main/a/apt/1.1 or contrib/liba/libapt/2.0
+   std::string Src = SrcName;
+   std::string path = APT::String::Startswith(SrcName, "lib") ? Src.substr(0, 4) : Src.substr(0,1);
+   path.append("/").append(Src).append("/");
+   path.append(Src).append("_").append(StripEpoch(SrcVersion));
+   // we omit component for releases without one (= flat-style repositories)
+   if (Component != NULL && strlen(Component) != 0)
+      path = std::string(Component) + "/" + path;
+
+   return SubstVar(Template, "CHANGEPATH", path);
+}
+                                                                       /*}}}*/
+// AcqChangelog::Failed - Failure handler                              /*{{{*/
+void pkgAcqChangelog::Failed(string const &Message, pkgAcquire::MethodConfig const * const Cnf)
+{
+   Item::Failed(Message,Cnf);
+
+   std::string errText;
+   // TRANSLATOR: %s=%s is sourcename=sourceversion, e.g. apt=1.1
+   strprintf(errText, _("Changelog unavailable for %s=%s"), SrcName.c_str(), SrcVersion.c_str());
+
+   // Error is probably something techy like 404 Not Found
+   if (ErrorText.empty())
+      ErrorText = errText;
+   else
+      ErrorText = errText + " (" + ErrorText + ")";
+   return;
+}
+                                                                       /*}}}*/
+// AcqChangelog::Done - Item downloaded OK                             /*{{{*/
+void pkgAcqChangelog::Done(string const &Message,HashStringList const &CalcHashes,
+                     pkgAcquire::MethodConfig const * const Cnf)
+{
+   Item::Done(Message,CalcHashes,Cnf);
+
+   Complete = true;
+}
+                                                                       /*}}}*/
+pkgAcqChangelog::~pkgAcqChangelog()                                    /*{{{*/
+{
+   if (TemporaryDirectory.empty() == false)
+   {
+      unlink(DestFile.c_str());
+      rmdir(TemporaryDirectory.c_str());
+   }
+}
+                                                                       /*}}}*/
 
 // AcqFile::pkgAcqFile - Constructor                                   /*{{{*/
 pkgAcqFile::pkgAcqFile(pkgAcquire * const Owner,string const &URI, HashStringList const &Hashes,
                       unsigned long long const Size,string const &Dsc,string const &ShortDesc,
                       const string &DestDir, const string &DestFilename,
                        bool const IsIndexFile) :
-                       Item(Owner), IsIndexFile(IsIndexFile), ExpectedHashes(Hashes)
+                       Item(Owner), d(NULL), IsIndexFile(IsIndexFile), ExpectedHashes(Hashes)
 {
    Retries = _config->FindI("Acquire::Retries",0);
 
@@ -2905,7 +3132,7 @@ void pkgAcqFile::Done(string const &Message,HashStringList const &CalcHashes,
       return;
 
    // We have to copy it into place
-   if (FileName != DestFile)
+   if (RealFileExists(DestFile.c_str()) == false)
    {
       Local = true;
       if (_config->FindB("Acquire::Source-Symlinks",true) == false ||
@@ -2966,3 +3193,4 @@ string pkgAcqFile::Custom600Headers() const                               /*{{{*/
    return "";
 }
                                                                        /*}}}*/
+pkgAcqFile::~pkgAcqFile() {}