1 files changed, 89 insertions, 0 deletions
diff --git a/libbuild2/bin/rule.cxx b/libbuild2/bin/rule.cxx
new file mode 100644
index 0000000..8c1174a
--- /dev/null
+++ b/libbuild2/bin/rule.cxx
@@ -0,0 +1,89 @@
+// file      : build2/bin/rule.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <libbuild2/bin/rule.hxx>
+
+#include <libbuild2/scope.hxx>
+#include <libbuild2/target.hxx>
+#include <libbuild2/algorithm.hxx>
+#include <libbuild2/diagnostics.hxx>
+
+#include <libbuild2/bin/target.hxx>
+
+using namespace std;
+
+namespace build2
+{
+  namespace bin
+  {
+    // fail_rule
+    //
+    bool fail_rule::
+    match (action a, target& t, const string&) const
+    {
+      const char* n (t.dynamic_type ().name); // Ignore derived type.
+
+      fail << diag_doing (a, t) << " target group" <<
+        info << "explicitly select " << n << "e{}, " << n << "a{}, or "
+           << n << "s{} member" << endf;
+    }
+
+    recipe fail_rule::
+    apply (action, target&) const {return empty_recipe;}
+
+    // lib_rule
+    //
+    // The whole logic is pretty much as if we had our two group members as
+    // our prerequisites.
+    //
+    lib_rule::members lib_rule::
+    build_members (const scope& rs)
+    {
+      const string& type (cast<string> (rs["bin.lib"]));
+
+      bool a (type == "static" || type == "both");
+      bool s (type == "shared" || type == "both");
+
+      if (!a && !s)
+        fail << "unknown library type: " << type <<
+          info << "'static', 'shared', or 'both' expected";
+
+      return members {a, s};
+    }
+
+    bool lib_rule::
+    match (action, target& xt, const string&) const
+    {
+      lib& t (xt.as<lib> ());
+
+      members bm (build_members (t.root_scope ()));
+      t.a = bm.a ? &search<liba> (t, t.dir, t.out, t.name) : nullptr;
+      t.s = bm.s ? &search<libs> (t, t.dir, t.out, t.name) : nullptr;
+
+      return true;
+    }
+
+    recipe lib_rule::
+    apply (action a, target& xt) const
+    {
+      lib& t (xt.as<lib> ());
+
+      //@@ outer: also prerequisites (if outer) or not?
+
+      const target* m[] = {t.a, t.s};
+      match_members (a, t, m);
+
+      return &perform;
+    }
+
+    target_state lib_rule::
+    perform (action a, const target& xt)
+    {
+      const lib& t (xt.as<lib> ());
+
+      const target* m[] = {t.a, t.s};
+      return execute_members (a, t, m);
+    }
+  }
+}