1 files changed, 52 insertions, 0 deletions
diff --git a/libbuild2/config/functions.cxx b/libbuild2/config/functions.cxx
new file mode 100644
index 0000000..79447a4
--- /dev/null
+++ b/libbuild2/config/functions.cxx
@@ -0,0 +1,52 @@
+// file      : libbuild2/config/functions.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <sstream>
+
+#include <libbuild2/scope.hxx>
+#include <libbuild2/function.hxx>
+#include <libbuild2/variable.hxx>
+
+#include <libbuild2/config/operation.hxx>
+
+using namespace std;
+
+namespace build2
+{
+  namespace config
+  {
+    void
+    functions (function_map& m)
+    {
+      function_family f (m, "config");
+
+      // Return the configuration file contents as a string, similar to the
+      // config.export variable functionality.
+      //
+      // Note that this function can only be used during configure unless the
+      // config module creation was forced for other meta-operations with
+      // config.module=true in bootstrap.build.
+      //
+      f[".export"] = [] (const scope* s)
+      {
+        if (s == nullptr)
+          fail << "config.export() called out of scope" << endf;
+
+        s = s->root_scope ();
+
+        if (s == nullptr)
+          fail << "config.export() called out of project" << endf;
+
+        ostringstream os;
+
+        // Empty project set should is ok as long as inherit is false.
+        //
+        project_set ps;
+        save_config (*s, os, "config.export()", false /* inherit */, ps);
+
+        return os.str ();
+      };
+    }
+  }
+}