5 files changed, 34 insertions, 2 deletions
diff --git a/apt-private/private-cmndline.cc b/apt-private/private-cmndline.cc
index 592ebd9..ac792cb 100644
--- a/apt-private/private-cmndline.cc
+++ b/apt-private/private-cmndline.cc
@@ -353,11 +353,13 @@ static bool addArgumentsAPT(std::vector<CommandLine::Args> &Args, char const * c
       addArg(0,"manual-installed","APT::Cmd::Manual-Installed",0);
       addArg('v', "verbose", "APT::Cmd::List-Include-Summary", 0);
       addArg('a', "all-versions", "APT::Cmd::All-Versions", 0);
+      addArg('S', "snapshot", "APT::Snapshot", CommandLine::HasArg);
    }
    else if (CmdMatches("show") || CmdMatches("info"))
    {
       addArg('a', "all-versions", "APT::Cache::AllVersions", 0);
       addArg('f', "full", "APT::Cache::ShowFull", 0);
+      addArg('S', "snapshot", "APT::Snapshot", CommandLine::HasArg);
    }
    else if (addArgumentsAPTGet(Args, Cmd) || addArgumentsAPTCache(Args, Cmd))
    {
diff --git a/apt-private/private-install.cc b/apt-private/private-install.cc
index 4f71f18..57b5c0d 100644
--- a/apt-private/private-install.cc
+++ b/apt-private/private-install.cc
@@ -658,6 +658,24 @@ bool DoAutomaticRemove(CacheFile &Cache)
 		    if (not Cache->VS().CheckDep(PVerStr, R->CompareOp, R.TargetVer()))
 		       continue;
 		 }
+		 // ignore new providers if we have installed providers
+		 if (Pkg->CurrentVer == 0)
+		 {
+		    std::unique_ptr<pkgCache::Version *[]> VList(R.AllTargets());
+		    bool has_installed_alt_prov = false;
+		    for (pkgCache::Version **V = VList.get(); *V != 0; ++V)
+		    {
+		       pkgCache::VerIterator Ver(Cache, *V);
+		       auto const P = Ver.ParentPkg();
+		       if (not P.end() && P->CurrentVer != 0 && Cache[P].InstallVer == *V)
+		       {
+			  has_installed_alt_prov = true;
+			  break;
+		       }
+		    }
+		    if (has_installed_alt_prov)
+		       continue;
+		 }
 		 if (Debug == true)
 		    std::clog << "Save " << APT::PrettyPkg(Cache, Pkg) << " as another installed package depends on it: " << APT::PrettyPkg(Cache, RP) << std::endl;
 		 Cache->MarkInstall(Pkg, false, 0, false);
@@ -711,7 +729,7 @@ bool DoAutomaticRemove(CacheFile &Cache)
 	          "The following packages were automatically installed and are no longer required:",
 	          autoRemoveCount), Universe,
 	       [&Cache](pkgCache::PkgIterator const &Pkg) { return (*Cache)[Pkg].Garbage == true && (*Cache)[Pkg].Delete() == false; },
-	       &PrettyFullName, CandidateVersion(&Cache), "", note);
+	       &PrettyFullName, CurrentVersion(&Cache), "", note);
       }
       else
       {
diff --git a/apt-private/private-main.cc b/apt-private/private-main.cc
index f28f5cb..39ad07b 100644
--- a/apt-private/private-main.cc
+++ b/apt-private/private-main.cc
@@ -81,6 +81,8 @@ void CheckIfCalledByScript(int argc, const char *argv[])		/*{{{*/
    if(!isatty(STDOUT_FILENO) &&
       _config->FindB("Apt::Cmd::Disable-Script-Warning", false) == false)
    {
+      // NOTE: CLI interface is redundant on the I/interface, this is
+      // intentional to make it easier to read.
       std::cerr << std::endl
                 << "WARNING: " << flNotDir(argv[0]) << " "
                 << "does not have a stable CLI interface. "
diff --git a/apt-private/private-output.cc b/apt-private/private-output.cc
index 2e81095..4a946f2 100644
--- a/apt-private/private-output.cc
+++ b/apt-private/private-output.cc
@@ -596,7 +596,7 @@ void ShowDel(ostream &out,CacheFile &Cache)
 	       str.append("*");
 	    return str;
 	 },
-	 CandidateVersion(&Cache),
+	 CurrentVersion(&Cache),
 	 "action::remove");
 }
 									/*}}}*/
@@ -888,6 +888,14 @@ std::string PrettyFullName(pkgCache::PkgIterator const &Pkg)
 {
    return Pkg.FullName(true);
 }
+std::string CurrentVersion(pkgCacheFile * const Cache, pkgCache::PkgIterator const &Pkg)
+{
+   return (*Cache)[Pkg].CurVersion;
+}
+std::function<std::string(pkgCache::PkgIterator const &)> CurrentVersion(pkgCacheFile * const Cache)
+{
+   return std::bind(static_cast<std::string(*)(pkgCacheFile * const, pkgCache::PkgIterator const&)>(&CurrentVersion), Cache, std::placeholders::_1);
+}
 std::string CandidateVersion(pkgCacheFile * const Cache, pkgCache::PkgIterator const &Pkg)
 {
    return (*Cache)[Pkg].CandVersion;
diff --git a/apt-private/private-output.h b/apt-private/private-output.h
index 0eba6f4..8e1d472 100644
--- a/apt-private/private-output.h
+++ b/apt-private/private-output.h
@@ -132,6 +132,8 @@ APT_PUBLIC bool YnPrompt(char const *const Question, bool Default = true);
 bool YnPrompt(char const * const Question, bool const Default, bool const ShowGlobalErrors, std::ostream &c1o, std::ostream &c2o);
 
 APT_PUBLIC std::string PrettyFullName(pkgCache::PkgIterator const &Pkg);
+std::string CurrentVersion(pkgCacheFile * const Cache, pkgCache::PkgIterator const &Pkg);
+std::function<std::string(pkgCache::PkgIterator const &)> CurrentVersion(pkgCacheFile * const Cache);
 std::string CandidateVersion(pkgCacheFile * const Cache, pkgCache::PkgIterator const &Pkg);
 std::function<std::string(pkgCache::PkgIterator const &)> CandidateVersion(pkgCacheFile * const Cache);
 std::string CurrentToCandidateVersion(pkgCacheFile * const Cache, pkgCache::PkgIterator const &Pkg);