store source name and version in binary cache

Accessing the package records to acquire this information is pretty
costly, so that information wasn't used so far in many places. The most
noticeable user by far is EDSP at the moment, but there are ideas to
change that which this commit tries to enable.

2 files changed, 24 insertions, 42 deletions

diff --git a/cmdline/apt-cache.cc b/cmdline/apt-cache.cc
index 5a5dde088..0f4f7e1ce 100644
--- a/cmdline/apt-cache.cc
+++ b/cmdline/apt-cache.cc
@@ -389,6 +389,8 @@ static bool Stats(CommandLine &)
 	    stritems.insert(V->VerStr);
 	 if (V->Section != 0)
 	    stritems.insert(V->Section);
+	 stritems.insert(V->SourcePkgName);
+	 stritems.insert(V->SourceVerStr);
 	 for (pkgCache::DepIterator D = V.DependsList(); D.end() == false; ++D)
 	 {
 	    if (D->Version != 0)
diff --git a/cmdline/apt-get.cc b/cmdline/apt-get.cc
index aed1beb4d..a5cafc39d 100644
--- a/cmdline/apt-get.cc
+++ b/cmdline/apt-get.cc
@@ -195,7 +195,7 @@ static std::string GetReleaseForSourceRecord(pkgSourceList *SrcList,
 // FindSrc - Find a source record					/*{{{*/
 // ---------------------------------------------------------------------
 /* */
-static pkgSrcRecords::Parser *FindSrc(const char *Name,pkgRecords &Recs,
+static pkgSrcRecords::Parser *FindSrc(const char *Name,
 			       pkgSrcRecords &SrcRecs,string &Src,
 			       CacheFile &CacheFile)
 {
@@ -303,16 +303,10 @@ static pkgSrcRecords::Parser *FindSrc(const char *Name,pkgRecords &Recs,
 		  (VF.File().Archive() != 0 && VF.File().Archive() == RelTag) ||
 		  (VF.File().Codename() != 0 && VF.File().Codename() == RelTag)) 
 	       {
-		  pkgRecords::Parser &Parse = Recs.Lookup(VF);
-		  Src = Parse.SourcePkg();
-		  // no SourcePkg name, so it is the "binary" name
-		  if (Src.empty() == true)
-		     Src = TmpSrc;
+		  Src = Ver.SourcePkgName();
 		  // the Version we have is possibly fuzzy or includes binUploads,
-		  // so we use the Version of the SourcePkg (empty if same as package)
-		  VerTag = Parse.SourceVer();
-		  if (VerTag.empty() == true)
-		     VerTag = Ver.VerStr();
+		  // so we use the Version of the SourcePkg
+		  VerTag = Ver.SourceVerStr();
 		  break;
 	       }
 	    }
@@ -343,10 +337,10 @@ static pkgSrcRecords::Parser *FindSrc(const char *Name,pkgRecords &Recs,
 	 pkgCache::VerIterator Ver = Cache->GetCandidateVer(Pkg);
 	 if (Ver.end() == false) 
 	 {
-	    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
-	    Src = Parse.SourcePkg();
-	    if (VerTag.empty() == true)
-	       VerTag = Parse.SourceVer();
+	    if (strcmp(Ver.SourcePkgName(),Ver.ParentPkg().Name()) != 0)
+	       Src = Ver.SourcePkgName();
+	    if (VerTag.empty() == true && strcmp(Ver.SourceVerStr(),Ver.VerStr()) != 0)
+	       VerTag = Ver.SourceVerStr();
 	 }
       }
    }
@@ -731,7 +725,6 @@ static bool DoSource(CommandLine &CmdL)
    pkgSourceList *List = Cache.GetSourceList();
    
    // Create the text record parsers
-   pkgRecords Recs(Cache);
    pkgSrcRecords SrcRecs(*List);
    if (_error->PendingError() == true)
       return false;
@@ -760,7 +753,7 @@ static bool DoSource(CommandLine &CmdL)
    for (const char **I = CmdL.FileList + 1; *I != 0; I++, J++)
    {
       string Src;
-      pkgSrcRecords::Parser *Last = FindSrc(*I,Recs,SrcRecs,Src,Cache);
+      pkgSrcRecords::Parser *Last = FindSrc(*I,SrcRecs,Src,Cache);
       
       if (Last == 0) {
 	 return _error->Error(_("Unable to find a source package for %s"),Src.c_str());
@@ -1037,7 +1030,6 @@ static bool DoBuildDep(CommandLine &CmdL)
    pkgSourceList *List = Cache.GetSourceList();
    
    // Create the text record parsers
-   pkgRecords Recs(Cache);
    pkgSrcRecords SrcRecs(*List);
    if (_error->PendingError() == true)
       return false;
@@ -1090,7 +1082,7 @@ static bool DoBuildDep(CommandLine &CmdL)
             Last = Type->CreateSrcPkgParser(*I);
       } else {
          // normal case, search the cache for the source file
-         Last = FindSrc(*I,Recs,SrcRecs,Src,Cache);
+         Last = FindSrc(*I,SrcRecs,Src,Cache);
       }
 
       if (Last == 0)
@@ -1441,21 +1433,15 @@ static bool DoBuildDep(CommandLine &CmdL)
  * pool/ next to the deb itself)
  * Example return: "pool/main/a/apt/apt_0.8.8ubuntu3" 
  */
-static string GetChangelogPath(CacheFile &Cache, 
-                        pkgCache::PkgIterator Pkg,
+static string GetChangelogPath(CacheFile &Cache,
                         pkgCache::VerIterator Ver)
 {
-   string path;
-
    pkgRecords Recs(Cache);
    pkgRecords::Parser &rec=Recs.Lookup(Ver.FileList());
-   string srcpkg = rec.SourcePkg().empty() ? Pkg.Name() : rec.SourcePkg();
-   string ver = Ver.VerStr();
-   // if there is a source version it always wins
-   if (rec.SourceVer() != "")
-      ver = rec.SourceVer();
-   path = flNotFile(rec.FileName());
-   path += srcpkg + "_" + StripEpoch(ver);
+   string path = flNotFile(rec.FileName());
+   path.append(Ver.SourcePkgName());
+   path.append("_");
+   path.append(StripEpoch(Ver.SourceVerStr()));
    return path;
 }
 									/*}}}*/
@@ -1469,7 +1455,6 @@ static string GetChangelogPath(CacheFile &Cache,
  *  http://packages.medibuntu.org/pool/non-free/m/mplayer/mplayer_1.0~rc4~try1.dsfg1-1ubuntu1+medibuntu1.changelog
  */
 static bool GuessThirdPartyChangelogUri(CacheFile &Cache, 
-                                 pkgCache::PkgIterator Pkg,
                                  pkgCache::VerIterator Ver,
                                  string &out_uri)
 {
@@ -1484,7 +1469,7 @@ static bool GuessThirdPartyChangelogUri(CacheFile &Cache,
       return false;
 
    // get archive uri for the binary deb
-   string path_without_dot_changelog = GetChangelogPath(Cache, Pkg, Ver);
+   string path_without_dot_changelog = GetChangelogPath(Cache, Ver);
    out_uri = index->ArchiveURI(path_without_dot_changelog + ".changelog");
 
    // now strip away the filename and add srcpkg_srcver.changelog
@@ -1502,25 +1487,20 @@ static bool DownloadChangelog(CacheFile &CacheFile, pkgAcquire &Fetcher,
  * GuessThirdPartyChangelogUri for details how)
  */
 {
-   string path;
-   string descr;
-   string server;
-   string changelog_uri;
-
-   // data structures we need
-   pkgCache::PkgIterator Pkg = Ver.ParentPkg();
-
    // make the server root configurable
-   server = _config->Find("Apt::Changelogs::Server",
+   string const server = _config->Find("Apt::Changelogs::Server",
                           "http://packages.debian.org/changelogs");
-   path = GetChangelogPath(CacheFile, Pkg, Ver);
+   string const path = GetChangelogPath(CacheFile, Ver);
+   string changelog_uri;
    strprintf(changelog_uri, "%s/%s/changelog", server.c_str(), path.c_str());
    if (_config->FindB("APT::Get::Print-URIs", false) == true)
    {
       std::cout << '\'' << changelog_uri << '\'' << std::endl;
       return true;
    }
+   pkgCache::PkgIterator const Pkg = Ver.ParentPkg();
 
+   string descr;
    strprintf(descr, _("Changelog for %s (%s)"), Pkg.Name(), changelog_uri.c_str());
    // queue it
    new pkgAcqFile(&Fetcher, changelog_uri, "", 0, descr, Pkg.Name(), "ignored", targetfile);
@@ -1531,7 +1511,7 @@ static bool DownloadChangelog(CacheFile &CacheFile, pkgAcquire &Fetcher,
    if (!FileExists(targetfile))
    {
       string third_party_uri;
-      if (GuessThirdPartyChangelogUri(CacheFile, Pkg, Ver, third_party_uri))
+      if (GuessThirdPartyChangelogUri(CacheFile, Ver, third_party_uri))
       {
          strprintf(descr, _("Changelog for %s (%s)"), Pkg.Name(), third_party_uri.c_str());
          new pkgAcqFile(&Fetcher, third_party_uri, "", 0, descr, Pkg.Name(), "ignored", targetfile);