add tag v2_2_9

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v2_2_9@61257 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 22 insertions, 0 deletions

diff --git a/ruby_2_2/lib/rake/trace_output.rb b/ruby_2_2/lib/rake/trace_output.rb
new file mode 100644
index 0000000000..396096d4df
--- /dev/null
+++ b/ruby_2_2/lib/rake/trace_output.rb
@@ -0,0 +1,22 @@
+module Rake
+  module TraceOutput # :nodoc: all
+
+    # Write trace output to output stream +out+.
+    #
+    # The write is done as a single IO call (to print) to lessen the
+    # chance that the trace output is interrupted by other tasks also
+    # producing output.
+    def trace_on(out, *strings)
+      sep = $\ || "\n"
+      if strings.empty?
+        output = sep
+      else
+        output = strings.map { |s|
+          next if s.nil?
+          s =~ /#{sep}$/ ? s : s + sep
+        }.join
+      end
+      out.print(output)
+    end
+  end
+end