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diff --git a/0.4.0/paludis/qa/deps_visible_check.cc b/0.4.0/paludis/qa/deps_visible_check.cc
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+++ b/0.4.0/paludis/qa/deps_visible_check.cc
@@ -0,0 +1,140 @@
+/* vim: set sw=4 sts=4 et foldmethod=syntax : */
+
+/*
+ * Copyright (c) 2006 Ciaran McCreesh <ciaran.mccreesh@blueyonder.co.uk>
+ *
+ * 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/qa/deps_visible_check.hh>
+
+#include <paludis/dep_parser.hh>
+#include <paludis/dep_atom.hh>
+
+using namespace paludis;
+using namespace paludis::qa;
+
+namespace
+{
+ struct Checker :
+ DepAtomVisitorTypes::ConstVisitor
+ {
+ CheckResult & result;
+ const std::string role;
+ const Environment * env;
+
+ Checker(CheckResult & rr, const std::string & r, const Environment * e) :
+ result(rr),
+ role(r),
+ env(e)
+ {
+ }
+
+ void visit(const PackageDepAtom * const p)
+ {
+ bool found(false);
+ PackageDatabaseEntryCollection::Pointer matches(env->package_database()->query(p,
+ is_either));
+ for (PackageDatabaseEntryCollection::ReverseIterator m(matches->rbegin()),
+ m_end(matches->rend()) ; m != m_end ; ++m)
+ {
+ if (env->mask_reasons(*m).any())
+ continue;
+
+ found = true;
+ break;
+ }
+
+ if (! found)
+ result << Message(qal_major, "No visible provider for " + role + " entry '"
+ + stringify(*p) + "'");
+ }
+
+ void visit(const AllDepAtom * const a)
+ {
+ std::for_each(a->begin(), a->end(), accept_visitor(this));
+ }
+
+ void visit(const AnyDepAtom * const)
+ {
+ }
+
+ void visit(const UseDepAtom * const)
+ {
+ }
+
+ void visit(const BlockDepAtom * const)
+ {
+ }
+
+ void visit(const PlainTextDepAtom * const)
+ {
+ }
+ };
+}
+
+DepsVisibleCheck::DepsVisibleCheck()
+{
+}
+
+CheckResult
+DepsVisibleCheck::operator() (const EbuildCheckData & e) const
+{
+ CheckResult result(stringify(e.get<ecd_name>()) + "-" + stringify(e.get<ecd_version>()),
+ identifier());
+
+ try
+ {
+ PackageDatabaseEntry ee(e.get<ecd_name>(), e.get<ecd_version>(),
+ e.get<ecd_environment>()->package_database()->favourite_repository());
+ VersionMetadata::ConstPointer metadata(
+ e.get<ecd_environment>()->package_database()->fetch_metadata(ee));
+
+ if (e.get<ecd_environment>()->mask_reasons(ee).any())
+ result << Message(qal_skip, "Masked, so skipping checks");
+ else
+ {
+ Checker depend_checker(result, "DEPEND", e.get<ecd_environment>());
+ std::string depend(metadata->get(vmk_depend));
+ DepParser::parse(depend)->accept(&depend_checker);
+
+ Checker rdepend_checker(result, "RDEPEND", e.get<ecd_environment>());
+ std::string rdepend(metadata->get(vmk_rdepend));
+ DepParser::parse(rdepend)->accept(&rdepend_checker);
+
+ Checker pdepend_checker(result, "PDEPEND", e.get<ecd_environment>());
+ std::string pdepend(metadata->get(vmk_pdepend));
+ DepParser::parse(pdepend)->accept(&pdepend_checker);
+ }
+ }
+ catch (const InternalError &)
+ {
+ throw;
+ }
+ catch (const Exception & e)
+ {
+ result << Message(qal_fatal, "Caught Exception '" + e.message() + "' ("
+ + e.what() + ")");
+ }
+
+ return result;
+}
+
+const std::string &
+DepsVisibleCheck::identifier()
+{
+ static const std::string id("deps visible");
+ return id;
+}
+