From 9fb791e9fad6c63fc1dac49f4d05ae63b8a3db9b Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Tue, 5 Jan 2016 11:55:15 +0200
Subject: Rename build directory/namespace to build2

---
 build2/config/utility.cxx | 92 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 build2/config/utility.cxx

(limited to 'build2/config/utility.cxx')

diff --git a/build2/config/utility.cxx b/build2/config/utility.cxx
new file mode 100644
index 0000000..361bd5e
--- /dev/null
+++ b/build2/config/utility.cxx
@@ -0,0 +1,92 @@
+// file      : build2/config/utility.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2015 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <build2/config/utility>
+
+#include <build2/context>
+
+using namespace std;
+
+namespace build2
+{
+  namespace config
+  {
+    const value&
+    optional (scope& root, const variable& var)
+    {
+      auto l (root[var]);
+
+      return l.defined ()
+        ? l.belongs (*global_scope) ? (root.assign (var) = *l) : *l
+        : root.assign (var); // NULL
+    }
+
+    const value&
+    optional_absolute (scope& root, const variable& var)
+    {
+      auto l (root[var]);
+
+      if (!l.defined ())
+        return root.assign (var); // NULL
+
+      if (!l.belongs (*global_scope)) // Value from (some) root scope.
+        return *l;
+
+      // Make the command-line value absolute. This is necessary to avoid
+      // a warning issued by the config module about global/root scope
+      // value mismatch.
+      //
+      value& v (const_cast<value&> (*l));
+
+      if (v && !v.empty ())
+      {
+        dir_path& d (as<dir_path> (v));
+
+        if (d.relative ())
+        {
+          d = work / d;
+          d.normalize ();
+        }
+      }
+
+      return root.assign (var) = v;
+    }
+
+    bool
+    specified (scope& r, const string& ns)
+    {
+      // Search all outer scopes for any value in this namespace.
+      //
+      for (scope* s (&r); s != nullptr; s = s->parent_scope ())
+      {
+        for (auto p (s->vars.find_namespace (ns));
+             p.first != p.second;
+             ++p.first)
+        {
+          const variable& var (p.first->first);
+
+          // Ignore config.*.configured.
+          //
+          if (var.name.size () < 11 ||
+              var.name.compare (var.name.size () - 11, 11, ".configured") != 0)
+            return true;
+        }
+      }
+
+      return false;
+    }
+
+    void
+    append_options (cstrings& args, const const_strings_value& sv)
+    {
+      if (!sv.empty ())
+      {
+        args.reserve (args.size () + sv.size ());
+
+        for (const string& s: sv)
+          args.push_back (s.c_str ());
+      }
+    }
+  }
+}
-- 
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