Add in-tree mspec and ruby/spec

* For easier modifications of ruby/spec by MRI developers.
* .gitignore: track changes under spec.
* spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec.
  These files can therefore be updated like any other file in MRI.
  Instructions are provided in spec/README.
  [Feature #13156] [ruby-core:79246]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 18 insertions, 0 deletions

diff --git a/spec/mspec/lib/mspec/guards/block_device.rb b/spec/mspec/lib/mspec/guards/block_device.rb
new file mode 100644
index 0000000000..327f6e564e
--- /dev/null
+++ b/spec/mspec/lib/mspec/guards/block_device.rb
@@ -0,0 +1,18 @@
+require 'mspec/guards/guard'
+
+class BlockDeviceGuard < SpecGuard
+  def match?
+    platform_is_not :freebsd, :windows, :opal do
+      block = `find /dev /devices -type b 2> /dev/null`
+      return !(block.nil? || block.empty?)
+    end
+
+    false
+  end
+end
+
+class Object
+  def with_block_device(&block)
+    BlockDeviceGuard.new.run_if(:with_block_device, &block)
+  end
+end