Move in build system module to separate library

1 files changed, 62 insertions, 0 deletions

diff --git a/libbuild2/in/target.cxx b/libbuild2/in/target.cxx
new file mode 100644
index 0000000..490ab10
--- /dev/null
+++ b/libbuild2/in/target.cxx
@@ -0,0 +1,62 @@
+// file      : libbuild2/in/target.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <libbuild2/in/target.hxx>
+
+using namespace std;
+
+namespace build2
+{
+  namespace in
+  {
+    static const target*
+    in_search (const target& xt, const prerequisite_key& cpk)
+    {
+      // If we have no extension then derive it from our target. Then delegate
+      // to file_search().
+      //
+      prerequisite_key pk (cpk);
+      optional<string>& e (pk.tk.ext);
+
+      if (!e)
+      {
+        if (const file* t = xt.is_a<file> ())
+        {
+          const string& te (t->derive_extension ());
+          e = te + (te.empty () ? "" : ".") + "in";
+        }
+        else
+          fail << "prerequisite " << pk << " for a non-file target " << xt;
+      }
+
+      return file_search (xt, pk);
+    }
+
+    static bool
+    in_pattern (const target_type&,
+                const scope&,
+                string&,
+                optional<string>&,
+                const location& l,
+                bool)
+    {
+      fail (l) << "pattern in in{} prerequisite" << endf;
+    }
+
+    extern const char in_ext_def[] = ""; // No extension by default.
+
+    const target_type in::static_type
+    {
+      "in",
+      &file::static_type,
+      &target_factory<in>,
+      &target_extension_fix<in_ext_def>,
+      nullptr, /* default_extension */   // Taken care of by search.
+      &in_pattern,
+      &target_print_1_ext_verb,          // Same as file.
+      &in_search,
+      false
+    };
+  }
+}