Split build system into library and driver

1 files changed, 109 insertions, 0 deletions

diff --git a/libbuild2/functions-name.cxx b/libbuild2/functions-name.cxx
new file mode 100644
index 0000000..a8e08b6
--- /dev/null
+++ b/libbuild2/functions-name.cxx
@@ -0,0 +1,109 @@
+// file      : libbuild2/functions-name.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <libbuild2/scope.hxx>
+#include <libbuild2/function.hxx>
+#include <libbuild2/variable.hxx>
+
+using namespace std;
+
+namespace build2
+{
+  // Convert name to target'ish name (see below for the 'ish part). Return
+  // raw/unprocessed data in case this is an unknown target type (or called
+  // out of scope). See scope::find_target_type() for details.
+  //
+  static pair<name, optional<string>>
+  to_target (const scope* s, name&& n)
+  {
+    optional<string> e;
+
+    if (s != nullptr)
+    {
+      auto rp (s->find_target_type (n, location ()));
+
+      if (rp.first != nullptr)
+        n.type = rp.first->name;
+
+      e = move (rp.second);
+    }
+
+    return make_pair (move (n), move (e));
+  }
+
+  void
+  name_functions ()
+  {
+    function_family f ("name");
+
+    // These functions treat a name as a target/prerequisite name.
+    //
+    // While on one hand it feels like calling them target.name(), etc., would
+    // have been more appropriate, on the other hand they can also be called
+    // on prerequisite names. They also won't always return the same result as
+    // if we were interrogating an actual target (e.g., the directory may be
+    // relative).
+    //
+    f["name"] = [](const scope* s, name n)
+    {
+      return to_target (s, move (n)).first.value;
+    };
+    f["name"] = [](const scope* s, names ns)
+    {
+      return to_target (s, convert<name> (move (ns))).first.value;
+    };
+
+    // Note: returns NULL if extension is unspecified (default) and empty if
+    // specified as no extension.
+    //
+    f["extension"] = [](const scope* s, name n)
+    {
+      return to_target (s, move (n)).second;
+    };
+    f["extension"] = [](const scope* s, names ns)
+    {
+      return to_target (s, convert<name> (move (ns))).second;
+    };
+
+    f["directory"] = [](const scope* s, name n)
+    {
+      return to_target (s, move (n)).first.dir;
+    };
+    f["directory"] = [](const scope* s, names ns)
+    {
+      return to_target (s, convert<name> (move (ns))).first.dir;
+    };
+
+    f["target_type"] = [](const scope* s, name n)
+    {
+      return to_target (s, move (n)).first.type;
+    };
+    f["target_type"] = [](const scope* s, names ns)
+    {
+      return to_target (s, convert<name> (move (ns))).first.type;
+    };
+
+    // Note: returns NULL if no project specified.
+    //
+    f["project"] = [](const scope* s, name n)
+    {
+      return to_target (s, move (n)).first.proj;
+    };
+    f["project"] = [](const scope* s, names ns)
+    {
+      return to_target (s, convert<name> (move (ns))).first.proj;
+    };
+
+    // Name-specific overloads from builtins.
+    //
+    function_family b ("builtin");
+
+    b[".concat"] = [](dir_path d, name n)
+    {
+      d /= n.dir;
+      n.dir = move (d);
+      return n;
+    };
+  }
+}