check build-dep candidate if install is forbidden

cmdline/apt-get.cc

@@ -2889,33 +2889,42 @@ bool DoBuildDep(CommandLine &CmdL)
 	       else
 		  Pkg = Cache->FindPkg(D->Package);
 
-	       // We need to decide if host or build arch, so find a version we can look at
-	       pkgCache::VerIterator Ver;
-
 	       // a bad version either is invalid or doesn't satify dependency
-	       #define BADVER(Ver) Ver.end() == true || \
-				   (Ver.end() == false && D->Version.empty() == false && \
-				    Cache->VS().CheckDep(Ver.VerStr(),D->Op,D->Version.c_str()) == false)
+	       #define BADVER(Ver) (Ver.end() == true || \
+				    (D->Version.empty() == false && \
+				     Cache->VS().CheckDep(Ver.VerStr(),D->Op,D->Version.c_str()) == false))
 
+	       APT::VersionList verlist;
 	       if (Pkg.end() == false)
 	       {
-		  Ver = (*Cache)[Pkg].InstVerIter(*Cache);
-		  if (BADVER(Ver))
-		     Ver = (*Cache)[Pkg].CandidateVerIter(*Cache);
+		  pkgCache::VerIterator Ver = (*Cache)[Pkg].InstVerIter(*Cache);
+		  if (BADVER(Ver) == false)
+		     verlist.insert(Ver);
+		  Ver = (*Cache)[Pkg].CandidateVerIter(*Cache);
+		  if (BADVER(Ver) == false)
+		     verlist.insert(Ver);
 	       }
-	       if (BADVER(Ver))
+	       if (verlist.empty() == true)
 	       {
 		  pkgCache::PkgIterator HostPkg = Cache->FindPkg(D->Package, hostArch);
 		  if (HostPkg.end() == false)
 		  {
-		     Ver = (*Cache)[HostPkg].InstVerIter(*Cache);
-		     if (BADVER(Ver))
-		        Ver = (*Cache)[HostPkg].CandidateVerIter(*Cache);
+		     pkgCache::VerIterator Ver = (*Cache)[HostPkg].InstVerIter(*Cache);
+		     if (BADVER(Ver) == false)
+			verlist.insert(Ver);
+		     Ver = (*Cache)[HostPkg].CandidateVerIter(*Cache);
+		     if (BADVER(Ver) == false)
+			verlist.insert(Ver);
 		  }
 	       }
-	       if ((BADVER(Ver)) == false)
+	       #undef BADVER
+
+	       string forbidden;
+	       // We need to decide if host or build arch, so find a version we can look at
+	       APT::VersionList::const_iterator Ver = verlist.begin();
+	       for (; Ver != verlist.end(); ++Ver)
 	       {
-		  string forbidden;
+		  forbidden.clear();
 		  if (Ver->MultiArch == pkgCache::Version::None || Ver->MultiArch == pkgCache::Version::All)
 		  {
 		     if (colon == string::npos)
@@ -2953,10 +2962,24 @@ bool DoBuildDep(CommandLine &CmdL)
 		     }
 		     // native gets buildArch
 		  }
+
 		  if (forbidden.empty() == false)
 		  {
 		     if (_config->FindB("Debug::BuildDeps",false) == true)
-			cout << D->Package.substr(colon, string::npos) << " is not allowed from " << forbidden << " package " << (*D).Package << endl;
+			cout << D->Package.substr(colon, string::npos) << " is not allowed from " << forbidden << " package " << (*D).Package << " (" << Ver.VerStr() << ")" << endl;
+		     continue;
+		  }
+
+		  //we found a good version
+		  break;
+	       }
+	       if (Ver == verlist.end())
+	       {
+		  if (_config->FindB("Debug::BuildDeps",false) == true)
+		     cout << " No multiarch info as we have no satisfying installed nor candidate for " << D->Package << " on build or host arch" << endl;
+
+		  if (forbidden.empty() == false)
+		  {
 		     if (hasAlternatives)
 			continue;
 		     return _error->Error(_("%s dependency for %s can't be satisfied "
@@ -2965,9 +2988,6 @@ bool DoBuildDep(CommandLine &CmdL)
 					  D->Package.c_str(), forbidden.c_str());
 		  }
 	       }
-	       else if (_config->FindB("Debug::BuildDeps",false) == true)
-		  cout << " No multiarch info as we have no satisfying installed nor candidate for " << D->Package << " on build or host arch" << endl;
-	       #undef BADVER
 	    }
 	    else
 	       Pkg = Cache->FindPkg(D->Package);

debian/changelog

@@ -11,6 +11,7 @@ apt (0.9.5.2) UNRELEASED; urgency=low
     - print URIs for all changelogs in case of --print-uris,
       thanks to Daniel Hartwig for the patch! (Closes: #674897)
     - show 'bzr branch' as 'bzr get' is deprecated (LP: #1011032)
+    - check build-dep candidate if install is forbidden
   * debian/apt-utils.links:
     - the internal resolver 'apt' is now directly installed in
       /usr/lib/apt/solvers, so don't instruct dh to create a broken link

test/integration/framework

@@ -508,7 +508,8 @@ Architecture: $ARCH" >> $FILE
 	test -z "$DEPENDENCIES" || echo "$DEPENDENCIES" >> $FILE
 	echo "Files:
  d41d8cd98f00b204e9800998ecf8427e 0 ${NAME}_${VERSION}.dsc
- d41d8cd98f00b204e9800998ecf8427e 0 ${NAME}_${VERSION}.tar.gz" >> $FILE
+ d41d8cd98f00b204e9800998ecf8427e 0 ${NAME}_${VERSION}.tar.gz
+" >> $FILE
 }
 
 insertinstalledpackage() {

test/integration/test-bug-632221-cross-dependency-satisfaction

@@ -23,8 +23,22 @@ insertpackage 'unstable' 'linux-stuff' 'amd64,armel' '1.0'
 
 insertsource 'unstable' 'apt' 'any' '0.8.15' 'Build-Depends: doxygen, libc6-dev, libc6-dev:native, cool:any, amdboot:amd64, foreigner, libfwibble-dev, arm-stuff [any-arm] | linux-stuff [ linux-any]'
 
+insertsource 'unstable' 'forbidden-none' 'any' '1' 'Build-Depends: amdboot:any'
+insertsource 'unstable' 'forbidden-same' 'any' '1' 'Build-Depends: libc6:any'
+insertsource 'unstable' 'forbidden-foreign' 'any' '1' 'Build-Depends: doxygen:any'
+
 setupaptarchive
 
+testequal "Reading package lists...
+Building dependency tree...
+E: Build-Depends dependency for forbidden-none can't be satisfied because amdboot:any is not allowed on 'Multi-Arch: none' packages" aptget build-dep forbidden-none -s -a armel
+testequal "Reading package lists...
+Building dependency tree...
+E: Build-Depends dependency for forbidden-same can't be satisfied because libc6:any is not allowed on 'Multi-Arch: same' packages" aptget build-dep forbidden-same -s -a armel
+testequal "Reading package lists...
+Building dependency tree...
+E: Build-Depends dependency for forbidden-foreign can't be satisfied because doxygen:any is not allowed on 'Multi-Arch: foreign' packages" aptget build-dep forbidden-foreign -s -a armel
+
 testequal 'Reading package lists...
 Building dependency tree...
 The following NEW packages will be installed: