lib/knife-windows/path_helper.rb in knife-windows-1.5.0 vs lib/knife-windows/path_helper.rb in knife-windows-1.6.0
- old
+ new
@@ -1,234 +1,234 @@
-#
-# Author:: Bryan McLellan <btm@loftninjas.org>
-# Copyright:: Copyright (c) 2014-2016 Chef Software, Inc.
-# License:: Apache License, Version 2.0
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-# Sourced from Chef::Util::PathHelper.
-# Should be removed when Chef 11 catches up or we stop supporting Chef 11
-
-module Knife
- module Windows
- 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
- while true
- 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)
- # Rather than find an equivalent for File.absolute_path on 1.8.7, just bail out
- raise NotImplementedError, "This feature is not supported on Ruby versions < 1.9" if RUBY_VERSION.to_f < 1.9
-
- # 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
- end
-end
-
-# Break a require loop when require chef/util/path_helper
-require 'chef/platform'
-require 'chef/exceptions'
+#
+# Author:: Bryan McLellan <btm@loftninjas.org>
+# Copyright:: Copyright (c) 2014-2016 Chef Software, Inc.
+# License:: Apache License, Version 2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# Sourced from Chef::Util::PathHelper.
+# Should be removed when Chef 11 catches up or we stop supporting Chef 11
+
+module Knife
+ module Windows
+ 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
+ while true
+ 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)
+ # Rather than find an equivalent for File.absolute_path on 1.8.7, just bail out
+ raise NotImplementedError, "This feature is not supported on Ruby versions < 1.9" if RUBY_VERSION.to_f < 1.9
+
+ # 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
+ end
+end
+
+# Break a require loop when require chef/util/path_helper
+require 'chef/platform'
+require 'chef/exceptions'