if the package has no installed & candidate but is virtual see if only

one package provides it - if it is only one use this package instead

diff --git a/cmdline/apt-get.cc b/cmdline/apt-get.cc
index 7ba0e8e..d3ddcbf 100644 (file)
--- a/cmdline/apt-get.cc
+++ b/cmdline/apt-get.cc
@@ -1081,41 +1081,6 @@ bool TryToInstall(pkgCache::PkgIterator Pkg,pkgDepCache &Cache,
                  pkgProblemResolver &Fix,bool Remove,bool BrokenFix,
                  bool AllowFail = true)
 {
-   /* This is a pure virtual package and there is a single available
-      candidate providing it. */
-   if (Cache[Pkg].CandidateVer == 0 && Pkg->ProvidesList != 0)
-   {
-      pkgCache::PkgIterator Prov;
-      bool found_one = false;
-
-      for (pkgCache::PrvIterator P = Pkg.ProvidesList(); P; P++)
-      {
-        pkgCache::VerIterator const PVer = P.OwnerVer();
-        pkgCache::PkgIterator const PPkg = PVer.ParentPkg();
-
-        /* Ignore versions that are not a candidate. */
-        if (Cache[PPkg].CandidateVer != PVer)
-            continue;
-
-        if (found_one == false)
-        {
-           Prov = PPkg;
-           found_one = true;
-        }
-        else if (PPkg != Prov)
-        {
-           found_one = false; // we found at least two
-           break;
-        }
-      }
-
-      if (found_one == true)
-      {
-        ioprintf(c1out,_("Note, selecting %s instead of %s\n"),
-                 Prov.FullName(true).c_str(),Pkg.FullName(true).c_str());
-        Pkg = Prov;
-      }
-   }
 
    // Handle the no-upgrade case
    if (_config->FindB("APT::Get::upgrade",true) == false &&
@@ -1601,13 +1566,13 @@ public:
 
        virtual void showTaskSelection(APT::PackageSet const &pkgset, string const &pattern) {
                for (APT::PackageSet::const_iterator Pkg = pkgset.begin(); Pkg != pkgset.end(); ++Pkg)
-                       ioprintf(out, _("Note, selecting %s for task '%s'\n"),
+                       ioprintf(out, _("Note, selecting '%s' for task '%s'\n"),
                                 Pkg.FullName(true).c_str(), pattern.c_str());
                explicitlyNamed = false;
        }
        virtual void showRegExSelection(APT::PackageSet const &pkgset, string const &pattern) {
                for (APT::PackageSet::const_iterator Pkg = pkgset.begin(); Pkg != pkgset.end(); ++Pkg)
-                       ioprintf(out, _("Note, selecting %s for regex '%s'\n"),
+                       ioprintf(out, _("Note, selecting '%s' for regex '%s'\n"),
                                 Pkg.FullName(true).c_str(), pattern.c_str());
                explicitlyNamed = false;
        }
@@ -1618,6 +1583,53 @@ public:
                                 Ver.VerStr(), Ver.RelStr().c_str(), Pkg.FullName(true).c_str());
        }
 
+       virtual APT::VersionSet canNotFindCandInstVer(pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg) {
+               return tryVirtualPackage(Cache, Pkg, APT::VersionSet::CANDINST);
+       }
+
+       virtual APT::VersionSet canNotFindInstCandVer(pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg) {
+               return tryVirtualPackage(Cache, Pkg, APT::VersionSet::INSTCAND);
+       }
+
+       APT::VersionSet tryVirtualPackage(pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg,
+                                               APT::VersionSet::Version const &select) {
+               /* This is a pure virtual package and there is a single available
+                  candidate providing it. */
+               if (unlikely(Cache[Pkg].CandidateVer != 0) || Pkg->ProvidesList == 0) {
+                       if (select == APT::VersionSet::CANDINST)
+                               return APT::CacheSetHelper::canNotFindCandInstVer(Cache, Pkg);
+                       return APT::CacheSetHelper::canNotFindInstCandVer(Cache, Pkg);
+               }
+
+               pkgCache::PkgIterator Prov;
+               bool found_one = false;
+               for (pkgCache::PrvIterator P = Pkg.ProvidesList(); P; ++P) {
+                       pkgCache::VerIterator const PVer = P.OwnerVer();
+                       pkgCache::PkgIterator const PPkg = PVer.ParentPkg();
+
+                       /* Ignore versions that are not a candidate. */
+                       if (Cache[PPkg].CandidateVer != PVer)
+                               continue;
+
+                       if (found_one == false) {
+                               Prov = PPkg;
+                               found_one = true;
+                       } else if (PPkg != Prov) {
+                               found_one = false; // we found at least two
+                               break;
+                       }
+               }
+
+               if (found_one == true) {
+                       ioprintf(out, _("Note, selecting '%s' instead of '%s'\n"),
+                                Prov.FullName(true).c_str(), Pkg.FullName(true).c_str());
+                       return APT::VersionSet::FromPackage(Cache, Prov, select, *this);
+               }
+               if (select == APT::VersionSet::CANDINST)
+                       return APT::CacheSetHelper::canNotFindCandInstVer(Cache, Pkg);
+               return APT::CacheSetHelper::canNotFindInstCandVer(Cache, Pkg);
+       }
+
        inline bool allPkgNamedExplicitly() const { return explicitlyNamed; }
 
 };

diff --git a/cmdline/cacheset.cc b/cmdline/cacheset.cc
index 35ef74f..cc2860a 100644 (file)
--- a/cmdline/cacheset.cc
+++ b/cmdline/cacheset.cc
@@ -474,6 +474,14 @@ VersionSet CacheSetHelper::canNotFindInstCandVer(pkgCacheFile &Cache,
        return VersionSet();
 }
                                                                        /*}}}*/
+// canNotFindInstCandVer                                               /*{{{*/
+VersionSet CacheSetHelper::canNotFindCandInstVer(pkgCacheFile &Cache,
+               pkgCache::PkgIterator const &Pkg) {
+       if (ShowError == true)
+               _error->Error(_("Can't select installed nor candidate version from package '%s' as it has neither of them"), Pkg.FullName(true).c_str());
+       return VersionSet();
+}
+                                                                       /*}}}*/
 // canNotFindNewestVer                                                 /*{{{*/
 pkgCache::VerIterator CacheSetHelper::canNotFindNewestVer(pkgCacheFile &Cache,
                pkgCache::PkgIterator const &Pkg) {

diff --git a/cmdline/cacheset.h b/cmdline/cacheset.h
index bf863fb..2ca794f 100644 (file)
--- a/cmdline/cacheset.h
+++ b/cmdline/cacheset.h
@@ -47,6 +47,8 @@ public:                                                                       /*{{{*/
        virtual VersionSet canNotFindAllVer(pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg);
        virtual VersionSet canNotFindInstCandVer(pkgCacheFile &Cache,
                                pkgCache::PkgIterator const &Pkg);
+       virtual VersionSet canNotFindCandInstVer(pkgCacheFile &Cache,
+                               pkgCache::PkgIterator const &Pkg);
        virtual pkgCache::VerIterator canNotFindNewestVer(pkgCacheFile &Cache,
                                pkgCache::PkgIterator const &Pkg);
        virtual pkgCache::VerIterator canNotFindCandidateVer(pkgCacheFile &Cache,