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, 41 insertions, 0 deletions

diff --git a/spec/mspec/tool/remove_old_guards.rb b/spec/mspec/tool/remove_old_guards.rb
new file mode 100644
index 0000000000..d0920344eb
--- /dev/null
+++ b/spec/mspec/tool/remove_old_guards.rb
@@ -0,0 +1,41 @@
+# Remove old version guards in ruby/spec
+
+def dedent(line)
+  if line.start_with?("  ")
+    line[2..-1]
+  else
+    line
+  end
+end
+
+def remove_guards(guard, keep)
+  Dir["*/**/*.rb"].each do |file|
+    contents = File.read(file)
+    if contents =~ guard
+      puts file
+      lines = contents.lines.to_a
+      while first = lines.find_index { |line| line =~ guard }
+        indent = lines[first][/^(\s*)/, 1].length
+        last = (first+1...lines.size).find { |i|
+          space = lines[i][/^(\s*)end$/, 1] and space.length == indent
+        }
+        raise file unless last
+        if keep
+          lines[first..last] = lines[first+1..last-1].map { |l| dedent(l) }
+        else
+          if first > 0 and lines[first-1] == "\n"
+            first -= 1
+          elsif lines[last+1] == "\n"
+            last += 1
+          end
+          lines[first..last] = []
+        end
+      end
+      File.write file, lines.join
+    end
+  end
+end
+
+version = "2.2"
+remove_guards(/ruby_version_is ["']#{version}["'] do/, true)
+remove_guards(/ruby_version_is ["'][0-9.]*["']...["']#{version}["'] do/, false)