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, 88 insertions, 0 deletions

diff --git a/ruby_2_2/lib/find.rb b/ruby_2_2/lib/find.rb
new file mode 100644
index 0000000000..55783a5695
--- /dev/null
+++ b/ruby_2_2/lib/find.rb
@@ -0,0 +1,88 @@
+#
+# find.rb: the Find module for processing all files under a given directory.
+#
+
+#
+# The +Find+ module supports the top-down traversal of a set of file paths.
+#
+# For example, to total the size of all files under your home directory,
+# ignoring anything in a "dot" directory (e.g. $HOME/.ssh):
+#
+#   require 'find'
+#
+#   total_size = 0
+#
+#   Find.find(ENV["HOME"]) do |path|
+#     if FileTest.directory?(path)
+#       if File.basename(path)[0] == ?.
+#         Find.prune       # Don't look any further into this directory.
+#       else
+#         next
+#       end
+#     else
+#       total_size += FileTest.size(path)
+#     end
+#   end
+#
+module Find
+
+  #
+  # Calls the associated block with the name of every file and directory listed
+  # as arguments, then recursively on their subdirectories, and so on.
+  #
+  # Returns an enumerator if no block is given.
+  #
+  # See the +Find+ module documentation for an example.
+  #
+  def find(*paths, ignore_error: true) # :yield: path
+    block_given? or return enum_for(__method__, *paths, ignore_error: ignore_error)
+
+    fs_encoding = Encoding.find("filesystem")
+
+    paths.collect!{|d| raise Errno::ENOENT unless File.exist?(d); d.dup}.each do |path|
+      path = path.to_path if path.respond_to? :to_path
+      enc = path.encoding == Encoding::US_ASCII ? fs_encoding : path.encoding
+      ps = [path]
+      while file = ps.shift
+        catch(:prune) do
+          yield file.dup.taint
+          begin
+            s = File.lstat(file)
+          rescue Errno::ENOENT, Errno::EACCES, Errno::ENOTDIR, Errno::ELOOP, Errno::ENAMETOOLONG
+            raise unless ignore_error
+            next
+          end
+          if s.directory? then
+            begin
+              fs = Dir.entries(file, encoding: enc)
+            rescue Errno::ENOENT, Errno::EACCES, Errno::ENOTDIR, Errno::ELOOP, Errno::ENAMETOOLONG
+              raise unless ignore_error
+              next
+            end
+            fs.sort!
+            fs.reverse_each {|f|
+              next if f == "." or f == ".."
+              f = File.join(file, f)
+              ps.unshift f.untaint
+            }
+          end
+        end
+      end
+    end
+    nil
+  end
+
+  #
+  # Skips the current file or directory, restarting the loop with the next
+  # entry. If the current file is a directory, that directory will not be
+  # recursively entered. Meaningful only within the block associated with
+  # Find::find.
+  #
+  # See the +Find+ module documentation for an example.
+  #
+  def prune
+    throw :prune
+  end
+
+  module_function :find, :prune
+end