Consolidate the locations where we have our internal perl modules

Instead of having perl modules under test/testlib, util and util/perl,
consolidate them all to be inside util/perl.

Reviewed-by: Andy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4069)

1 files changed, 25 insertions, 0 deletions

diff --git a/util/perl/with_fallback.pm b/util/perl/with_fallback.pm
new file mode 100644
index 0000000000..2af1d5fbd5
--- /dev/null
+++ b/util/perl/with_fallback.pm
@@ -0,0 +1,25 @@
+# Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
+#
+# Licensed under the OpenSSL license (the "License").  You may not use
+# this file except in compliance with the License.  You can obtain a copy
+# in the file LICENSE in the source distribution or at
+# https://www.openssl.org/source/license.html
+
+package with_fallback;
+
+sub import {
+    use File::Basename;
+    use File::Spec::Functions;
+    foreach (@_) {
+	eval "require $_";
+	if ($@) {
+	    unshift @INC, catdir(dirname(__FILE__),
+                                 "..", "..", "external", "perl");
+	    my $transfer = "transfer::$_";
+	    eval "require $transfer";
+	    shift @INC;
+	    warn $@ if $@;
+	}
+    }
+}
+1;