From 4ca7c8417971239ac773c530974e9acce327cc86 Mon Sep 17 00:00:00 2001
From: mats cronqvist <masse@klarna.com>
Date: Fri, 6 Dec 2013 10:45:52 +0100
Subject: [PATCH] introduce xref_extra_paths

---
 rebar.config.sample | 5 +++++
 src/rebar_xref.erl  | 3 +++
 2 files changed, 8 insertions(+)

diff --git a/rebar.config.sample b/rebar.config.sample
index e6071bd..30d28d0 100644
--- a/rebar.config.sample
+++ b/rebar.config.sample
@@ -221,6 +221,11 @@
 
 {xref_warnings, false}.
 
+%% optional extra paths to include in xref:set_library_path/2.
+%% specified relative location of rebar.config.
+%% e.g. {xref_extra_paths,["../gtknode/src"]}
+{xref_extra_paths,[]}.
+
 %% xref checks to run
 {xref_checks, [undefined_function_calls, undefined_functions,
                locals_not_used, exports_not_used,
diff --git a/src/rebar_xref.erl b/src/rebar_xref.erl
index 0d89460..91fb60d 100644
--- a/src/rebar_xref.erl
+++ b/src/rebar_xref.erl
@@ -103,9 +103,11 @@ info(help, xref) ->
        "Valid rebar.config options:~n"
        "  ~p~n"
        "  ~p~n"
+       "  ~p~n"
        "  ~p~n",
        [
         {xref_warnings, false},
+        {xref_extra_paths,[]},
         {xref_checks, [undefined_function_calls, undefined_functions,
                        locals_not_used, exports_not_used,
                        deprecated_function_calls, deprecated_functions]},
@@ -146,6 +148,7 @@ code_path(Config) ->
     %% properly into the overall compile code path if possible.
     BaseDir = rebar_config:get_xconf(Config, base_dir),
     [P || P <- code:get_path() ++
+              rebar_config:get(Config, xref_extra_paths, []) ++
               [filename:join(BaseDir, filename:join(SubDir, "ebin"))
                || SubDir <- rebar_config:get(Config, sub_dirs, [])],
           filelib:is_dir(P)].