Add ability to pass scope to buildfile functions, add $install.resolve()

2 files changed, 37 insertions, 1 deletions

diff --git a/build2/install/functions.cxx b/build2/install/functions.cxx
new file mode 100644
index 0000000..b9298b2
--- /dev/null
+++ b/build2/install/functions.cxx
@@ -0,0 +1,27 @@
+// file      : build2/install/functions.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <build2/function.hxx>
+#include <build2/variable.hxx>
+
+#include <build2/install/utility.hxx>
+
+using namespace std;
+
+namespace build2
+{
+  namespace install
+  {
+    void
+    functions ()
+    {
+      function_family f ("install");
+
+      // Resolve potentially relative install.* value to an absolute directory
+      // based on (other) install.* values visible from the calling scope.
+      //
+      f["resolve"] = &resolve_dir;
+    }
+  }
+}
diff --git a/build2/install/init.cxx b/build2/install/init.cxx
index 757d4ef..b5fd007 100644
--- a/build2/install/init.cxx
+++ b/build2/install/init.cxx
@@ -7,6 +7,7 @@
 #include <build2/scope.hxx>
 #include <build2/target.hxx>
 #include <build2/rule.hxx>
+#include <build2/function.hxx>
 #include <build2/operation.hxx>
 #include <build2/diagnostics.hxx>
 
@@ -125,12 +126,20 @@ namespace build2
     }
 
     void
+    functions (); // functions.cxx
+
+    void
     boot (scope& r, const location&, unique_ptr<module_base>&)
     {
       tracer trace ("install::boot");
-
       l5 ([&]{trace << "for " << r.out_path ();});
 
+      // Register install function family if this is the first instance of the
+      // install modules.
+      //
+      if (!function_family::defined ("install"))
+        functions ();
+
       // Register the install and uninstall operations.
       //
       r.operations.insert (install_id, install);