aboutsummaryrefslogtreecommitdiff
path: root/paludis/resolver/accumulate_deps.cc
diff options
context:
space:
mode:
Diffstat (limited to 'paludis/resolver/accumulate_deps.cc')
-rw-r--r--paludis/resolver/accumulate_deps.cc66
1 files changed, 66 insertions, 0 deletions
diff --git a/paludis/resolver/accumulate_deps.cc b/paludis/resolver/accumulate_deps.cc
new file mode 100644
index 0000000..2beeada
--- /dev/null
+++ b/paludis/resolver/accumulate_deps.cc
@@ -0,0 +1,66 @@
+/* vim: set sw=4 sts=4 et foldmethod=syntax : */
+
+/*
+ * Copyright (c) 2010, 2011 Ciaran McCreesh
+ *
+ * This file is part of the Paludis package manager. Paludis is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU General
+ * Public License version 2, as published by the Free Software Foundation.
+ *
+ * Paludis is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <paludis/resolver/accumulate_deps.hh>
+#include <paludis/resolver/collect_depped_upon.hh>
+#include <paludis/util/set.hh>
+#include <paludis/util/sequence.hh>
+#include <paludis/util/wrapped_output_iterator.hh>
+#include <paludis/package_id.hh>
+#include <algorithm>
+
+using namespace paludis;
+using namespace paludis::resolver;
+
+const std::shared_ptr<const PackageIDSet>
+paludis::resolver::accumulate_deps(
+ const Environment * const env,
+ const std::shared_ptr<const PackageIDSet> & start,
+ const std::shared_ptr<const PackageIDSequence> & will_eventually_have,
+ const bool recurse,
+ const std::function<void ()> & step)
+{
+ const std::shared_ptr<PackageIDSet> result(std::make_shared<PackageIDSet>()), done(std::make_shared<PackageIDSet>());
+ std::copy(start->begin(), start->end(), result->inserter());
+
+ while (result->size() > done->size())
+ {
+ const std::shared_ptr<PackageIDSet> more(std::make_shared<PackageIDSet>());
+ std::set_difference(result->begin(), result->end(), done->begin(), done->end(), more->inserter(), PackageIDSetComparator());
+
+ for (PackageIDSet::ConstIterator i(more->begin()), i_end(more->end()) ;
+ i != i_end ; ++i)
+ {
+ step();
+
+ done->insert(*i);
+
+ const std::shared_ptr<const PackageIDSet> depped_upon(collect_depped_upon(
+ env, *i, will_eventually_have, std::make_shared<PackageIDSequence>()));
+ std::copy(depped_upon->begin(), depped_upon->end(), result->inserter());
+ }
+
+ if (! recurse)
+ break;
+ }
+
+ return result;
+}
+
+