Signed-off-by: Felipe Contreras <felipe.contre...@gmail.com>
---
 ruby.c           | 11 +++++++++++
 t/t10000-ruby.sh | 11 +++++++++++
 2 files changed, 22 insertions(+)

diff --git a/ruby.c b/ruby.c
index c2ef72e..0ab56de 100644
--- a/ruby.c
+++ b/ruby.c
@@ -41,10 +41,21 @@ static VALUE git_rb_for_each_ref(void)
        return INT2FIX(r);
 }
 
+static VALUE git_rb_dwim_ref(VALUE self, VALUE name)
+{
+       unsigned char buf[20];
+       char *ref;
+       int r;
+
+       r = dwim_ref(RSTRING_PTR(name), RSTRING_LEN(name), buf, &ref);
+       return rb_ary_new3(3, sha1_to_str(buf), INT2NUM(r), cstr_to_str(ref));
+}
+
 static void git_ruby_init(void)
 {
        rb_define_global_function("setup_git_directory", 
git_rb_setup_git_directory, 0);
        rb_define_global_function("for_each_ref", git_rb_for_each_ref, 0);
+       rb_define_global_function("dwim_ref", git_rb_dwim_ref, 1);
 }
 
 static int run_ruby_command(const char *cmd, int argc, const char **argv)
diff --git a/t/t10000-ruby.sh b/t/t10000-ruby.sh
index 2098e29..d719b30 100755
--- a/t/t10000-ruby.sh
+++ b/t/t10000-ruby.sh
@@ -52,4 +52,15 @@ test_expect_success 'test setup_git_directory()' '
        test_cmp expected actual
 '
 
+test_expect_success 'test dwim_ref()' '
+       git ruby > actual <<-EOF &&
+       sha1, num, ref = dwim_ref("HEAD")
+       puts sha1_to_hex(sha1), num, ref
+       EOF
+       git rev-parse -q --verify HEAD > expected &&
+       echo 1 >> expected &&
+       git rev-parse -q --verify --symbolic-full-name HEAD >> expected &&
+       test_cmp expected actual
+'
+
 test_done
-- 
1.8.4-fc

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