1 files changed, 23 insertions, 0 deletions
diff --git a/t/bin/sha1sum.rb b/t/bin/sha1sum.rb
new file mode 100755
index 0000000..b602e79
--- /dev/null
+++ b/t/bin/sha1sum.rb
@@ -0,0 +1,23 @@
+#!/usr/bin/env ruby
+# -*- encoding: binary -*-
+
+# Reads from stdin and outputs the SHA1 hex digest of the input this is
+# ONLY used as a last resort, our test code will try to use sha1sum(1),
+# openssl(1), or gsha1sum(1) before falling back to using this.  We try
+# all options first because we have a strong and healthy distrust of our
+# Ruby abilities in general, and *especially* when it comes to
+# understanding (and trusting the implementation of) Ruby 1.9 encoding.
+
+require 'digest/sha1'
+$stdout.sync = $stderr.sync = true
+$stdout.binmode
+$stdin.binmode
+bs = 16384
+digest = Digest::SHA1.new
+if buf = $stdin.read(bs)
+  begin
+    digest.update(buf)
+  end while $stdin.read(bs, buf)
+end
+
+$stdout.syswrite("#{digest.hexdigest}\n")