Use PathHelper from chef-config

1 files changed, 3 insertions, 204 deletions

diff --git a/lib/chef/util/path_helper.rb b/lib/chef/util/path_helper.rb
index 66c2e3f19f..10527f8906 100644
--- a/lib/chef/util/path_helper.rb
+++ b/lib/chef/util/path_helper.rb
@@ -16,212 +16,11 @@
 # limitations under the License.
 #
 
+require 'chef-config/path_helper'
+
 class Chef
   class Util
-    class PathHelper
-      # Maximum characters in a standard Windows path (260 including drive letter and NUL)
-      WIN_MAX_PATH = 259
-
-      def self.dirname(path)
-        if Chef::Platform.windows?
-          # Find the first slash, not counting trailing slashes
-          end_slash = path.size
-          loop do
-            slash = path.rindex(/[#{Regexp.escape(File::SEPARATOR)}#{Regexp.escape(path_separator)}]/, end_slash - 1)
-            if !slash
-              return end_slash == path.size ? '.' : path_separator
-            elsif slash == end_slash - 1
-              end_slash = slash
-            else
-              return path[0..slash-1]
-            end
-          end
-        else
-          ::File.dirname(path)
-        end
-      end
-
-      BACKSLASH = '\\'.freeze
-
-      def self.path_separator
-        if Chef::Platform.windows?
-          File::ALT_SEPARATOR || BACKSLASH
-        else
-          File::SEPARATOR
-        end
-      end
-
-      def self.join(*args)
-        args.flatten.inject do |joined_path, component|
-          # Joined path ends with /
-          joined_path = joined_path.sub(/[#{Regexp.escape(File::SEPARATOR)}#{Regexp.escape(path_separator)}]+$/, '')
-          component = component.sub(/^[#{Regexp.escape(File::SEPARATOR)}#{Regexp.escape(path_separator)}]+/, '')
-          joined_path += "#{path_separator}#{component}"
-        end
-      end
-
-      def self.validate_path(path)
-        if Chef::Platform.windows?
-          unless printable?(path)
-            msg = "Path '#{path}' contains non-printable characters. Check that backslashes are escaped with another backslash (e.g. C:\\\\Windows) in double-quoted strings."
-            Chef::Log.error(msg)
-            raise Chef::Exceptions::ValidationFailed, msg
-          end
-
-          if windows_max_length_exceeded?(path)
-            Chef::Log.debug("Path '#{path}' is longer than #{WIN_MAX_PATH}, prefixing with'\\\\?\\'")
-            path.insert(0, "\\\\?\\")
-          end
-        end
-
-        path
-      end
-
-      def self.windows_max_length_exceeded?(path)
-        # Check to see if paths without the \\?\ prefix are over the maximum allowed length for the Windows API
-        # http://msdn.microsoft.com/en-us/library/windows/desktop/aa365247%28v=vs.85%29.aspx
-        unless path =~ /^\\\\?\\/
-          if path.length > WIN_MAX_PATH
-            return true
-          end
-        end
-
-        false
-      end
-
-      def self.printable?(string)
-        # returns true if string is free of non-printable characters (escape sequences)
-        # this returns false for whitespace escape sequences as well, e.g. \n\t
-        if string =~ /[^[:print:]]/
-          false
-        else
-          true
-        end
-      end
-
-      # Produces a comparable path.
-      def self.canonical_path(path, add_prefix=true)
-        # First remove extra separators and resolve any relative paths
-        abs_path = File.absolute_path(path)
-
-        if Chef::Platform.windows?
-          # Add the \\?\ API prefix on Windows unless add_prefix is false
-          # Downcase on Windows where paths are still case-insensitive
-          abs_path.gsub!(::File::SEPARATOR, path_separator)
-          if add_prefix && abs_path !~ /^\\\\?\\/
-            abs_path.insert(0, "\\\\?\\")
-          end
-
-          abs_path.downcase!
-        end
-
-        abs_path
-      end
-
-      def self.cleanpath(path)
-        path = Pathname.new(path).cleanpath.to_s
-        # ensure all forward slashes are backslashes
-        if Chef::Platform.windows?
-          path = path.gsub(File::SEPARATOR, path_separator)
-        end
-        path
-      end
-
-      def self.paths_eql?(path1, path2)
-        canonical_path(path1) == canonical_path(path2)
-      end
-
-      # Paths which may contain glob-reserved characters need
-      # to be escaped before globbing can be done.
-      # http://stackoverflow.com/questions/14127343
-      def self.escape_glob(*parts)
-        path = cleanpath(join(*parts))
-        path.gsub(/[\\\{\}\[\]\*\?]/) { |x| "\\"+x }
-      end
-
-      def self.relative_path_from(from, to)
-        pathname = Pathname.new(Chef::Util::PathHelper.cleanpath(to)).relative_path_from(Pathname.new(Chef::Util::PathHelper.cleanpath(from)))
-      end
-
-      # Retrieves the "home directory" of the current user while trying to ascertain the existence
-      # of said directory.  The path returned uses / for all separators (the ruby standard format).
-      # If the home directory doesn't exist or an error is otherwise encountered, nil is returned.
-      # 
-      # If a set of path elements is provided, they are appended as-is to the home path if the
-      # homepath exists. 
-      # 
-      # If an optional block is provided, the joined path is passed to that block if the home path is
-      # valid and the result of the block is returned instead.
-      #
-      # Home-path discovery is performed once.  If a path is discovered, that value is memoized so
-      # that subsequent calls to home_dir don't bounce around.
-      #
-      # See self.all_homes.
-      def self.home(*args)
-        @@home_dir ||= self.all_homes { |p| break p }
-        if @@home_dir
-          path = File.join(@@home_dir, *args)
-          block_given? ? (yield path) : path
-        end
-      end
-
-      # See self.home.  This method performs a similar operation except that it yields all the different
-      # possible values of 'HOME' that one could have on this platform.  Hence, on windows, if
-      # HOMEDRIVE\HOMEPATH and USERPROFILE are different, the provided block will be called twice.
-      # This method goes out and checks the existence of each location at the time of the call.
-      #
-      # The return is a list of all the returned values from each block invocation or a list of paths
-      # if no block is provided.
-      def self.all_homes(*args)
-        paths = []
-        if Chef::Platform.windows?
-          # By default, Ruby uses the the following environment variables to determine Dir.home:
-          # HOME
-          # HOMEDRIVE HOMEPATH
-          # USERPROFILE
-          # Ruby only checks to see if the variable is specified - not if the directory actually exists.
-          # On Windows, HOMEDRIVE HOMEPATH can point to a different location (such as an unavailable network mounted drive)
-          # while USERPROFILE points to the location where the user application settings and profile are stored.  HOME
-          # is not defined as an environment variable (usually).  If the home path actually uses UNC, then the prefix is
-          # HOMESHARE instead of HOMEDRIVE.
-          #
-          # We instead walk down the following and only include paths that actually exist.
-          # HOME
-          # HOMEDRIVE HOMEPATH
-          # HOMESHARE HOMEPATH
-          # USERPROFILE
-
-          paths << ENV['HOME']
-          paths << ENV['HOMEDRIVE'] + ENV['HOMEPATH'] if ENV['HOMEDRIVE'] && ENV['HOMEPATH']
-          paths << ENV['HOMESHARE'] + ENV['HOMEPATH'] if ENV['HOMESHARE'] && ENV['HOMEPATH']
-          paths << ENV['USERPROFILE']
-        end
-        paths << Dir.home if ENV['HOME']
-
-        # Depending on what environment variables we're using, the slashes can go in any which way.
-        # Just change them all to / to keep things consistent.
-        # Note: Maybe this is a bad idea on some unixy systems where \ might be a valid character depending on
-        # the particular brand of kool-aid you consume.  This code assumes that \ and / are both
-        # path separators on any system being used.
-        paths = paths.map { |home_path| home_path.gsub(path_separator, ::File::SEPARATOR) if home_path }
-
-        # Filter out duplicate paths and paths that don't exist.
-        valid_paths = paths.select { |home_path| home_path && Dir.exists?(home_path) }
-        valid_paths = valid_paths.uniq
-
-        # Join all optional path elements at the end.
-        # If a block is provided, invoke it - otherwise just return what we've got.
-        joined_paths = valid_paths.map { |home_path| File.join(home_path, *args) }
-        if block_given?
-          joined_paths.each { |p| yield p }
-        else
-          joined_paths
-        end
-      end
-    end
+    PathHelper = ChefConfig::PathHelper
   end
 end
 
-# Break a require loop when require chef/util/path_helper
-require 'chef/platform'
-require 'chef/exceptions'