# # = pathname.rb # # Object-Oriented Pathname Class # # Author:: Tanaka Akira <akr@m17n.org> # Documentation:: Author and Gavin Sinclair # # For documentation, see class Pathname. # require 'pathname.so' class Pathname # :stopdoc: if RUBY_VERSION < "1.9" TO_PATH = :to_str else # to_path is implemented so Pathname objects are usable with File.open, etc. TO_PATH = :to_path end SAME_PATHS = if File::FNM_SYSCASE.nonzero? # Avoid #zero? here because #casecmp can return nil. proc {|a, b| a.casecmp(b) == 0} else proc {|a, b| a == b} end if File::ALT_SEPARATOR SEPARATOR_LIST = "#{Regexp.quote File::ALT_SEPARATOR}#{Regexp.quote File::SEPARATOR}" SEPARATOR_PAT = /[#{SEPARATOR_LIST}]/ else SEPARATOR_LIST = "#{Regexp.quote File::SEPARATOR}" SEPARATOR_PAT = /#{Regexp.quote File::SEPARATOR}/ end # :startdoc: # chop_basename(path) -> [pre-basename, basename] or nil def chop_basename(path) # :nodoc: base = File.basename(path) if /\A#{SEPARATOR_PAT}?\z/o =~ base return nil else return path[0, path.rindex(base)], base end end private :chop_basename # split_names(path) -> prefix, [name, ...] def split_names(path) # :nodoc: names = [] while r = chop_basename(path) path, basename = r names.unshift basename end return path, names end private :split_names def prepend_prefix(prefix, relpath) # :nodoc: if relpath.empty? File.dirname(prefix) elsif /#{SEPARATOR_PAT}/o =~ prefix prefix = File.dirname(prefix) prefix = File.join(prefix, "") if File.basename(prefix + 'a') != 'a' prefix + relpath else prefix + relpath end end private :prepend_prefix # Returns clean pathname of +self+ with consecutive slashes and useless dots # removed. The filesystem is not accessed. # # If +consider_symlink+ is +true+, then a more conservative algorithm is used # to avoid breaking symbolic linkages. This may retain more +..+ # entries than absolutely necessary, but without accessing the filesystem, # this can't be avoided. # # See Pathname#realpath. # def cleanpath(consider_symlink=false) if consider_symlink cleanpath_conservative else cleanpath_aggressive end end # # Clean the path simply by resolving and removing excess +.+ and +..+ entries. # Nothing more, nothing less. # def cleanpath_aggressive # :nodoc: path = @path names = [] pre = path while r = chop_basename(pre) pre, base = r case base when '.' when '..' names.unshift base else if names[0] == '..' names.shift else names.unshift base end end end pre.tr!(File::ALT_SEPARATOR, File::SEPARATOR) if File::ALT_SEPARATOR if /#{SEPARATOR_PAT}/o =~ File.basename(pre) names.shift while names[0] == '..' end self.class.new(prepend_prefix(pre, File.join(*names))) end private :cleanpath_aggressive # has_trailing_separator?(path) -> bool def has_trailing_separator?(path) # :nodoc: if r = chop_basename(path) pre, basename = r pre.length + basename.length < path.length else false end end private :has_trailing_separator? # add_trailing_separator(path) -> path def add_trailing_separator(path) # :nodoc: if File.basename(path + 'a') == 'a' path else File.join(path, "") # xxx: Is File.join is appropriate to add separator? end end private :add_trailing_separator def del_trailing_separator(path) # :nodoc: if r = chop_basename(path) pre, basename = r pre + basename elsif /#{SEPARATOR_PAT}+\z/o =~ path $` + File.dirname(path)[/#{SEPARATOR_PAT}*\z/o] else path end end private :del_trailing_separator def cleanpath_conservative # :nodoc: path = @path names = [] pre = path while r = chop_basename(pre) pre, base = r names.unshift base if base != '.' end pre.tr!(File::ALT_SEPARATOR, File::SEPARATOR) if File::ALT_SEPARATOR if /#{SEPARATOR_PAT}/o =~ File.basename(pre) names.shift while names[0] == '..' end if names.empty? self.class.new(File.dirname(pre)) else if names.last != '..' && File.basename(path) == '.' names << '.' end result = prepend_prefix(pre, File.join(*names)) if /\A(?:\.|\.\.)\z/ !~ names.last && has_trailing_separator?(path) self.class.new(add_trailing_separator(result)) else self.class.new(result) end end end private :cleanpath_conservative # Returns the parent directory. # # This is same as <code>self + '..'</code>. def parent self + '..' end # Returns +true+ if +self+ points to a mountpoint. def mountpoint? begin stat1 = self.lstat stat2 = self.parent.lstat stat1.dev == stat2.dev && stat1.ino == stat2.ino || stat1.dev != stat2.dev rescue Errno::ENOENT false end end # # Predicate method for root directories. Returns +true+ if the # pathname consists of consecutive slashes. # # It doesn't access the filesystem. So it may return +false+ for some # pathnames which points to roots such as <tt>/usr/..</tt>. # def root? !!(chop_basename(@path) == nil && /#{SEPARATOR_PAT}/o =~ @path) end # Predicate method for testing whether a path is absolute. # # It returns +true+ if the pathname begins with a slash. # # p = Pathname.new('/im/sure') # p.absolute? # #=> true # # p = Pathname.new('not/so/sure') # p.absolute? # #=> false def absolute? !relative? end # The opposite of Pathname#absolute? # # It returns +false+ if the pathname begins with a slash. # # p = Pathname.new('/im/sure') # p.relative? # #=> false # # p = Pathname.new('not/so/sure') # p.relative? # #=> true def relative? path = @path while r = chop_basename(path) path, = r end path == '' end # # Iterates over each component of the path. # # Pathname.new("/usr/bin/ruby").each_filename {|filename| ... } # # yields "usr", "bin", and "ruby". # # Returns an Enumerator if no block was given. # # enum = Pathname.new("/usr/bin/ruby").each_filename # # ... do stuff ... # enum.each { |e| ... } # # yields "usr", "bin", and "ruby". # def each_filename # :yield: filename return to_enum(__method__) unless block_given? _, names = split_names(@path) names.each {|filename| yield filename } nil end # Iterates over and yields a new Pathname object # for each element in the given path in descending order. # # Pathname.new('/path/to/some/file.rb').descend {|v| p v} # #<Pathname:/> # #<Pathname:/path> # #<Pathname:/path/to> # #<Pathname:/path/to/some> # #<Pathname:/path/to/some/file.rb> # # Pathname.new('path/to/some/file.rb').descend {|v| p v} # #<Pathname:path> # #<Pathname:path/to> # #<Pathname:path/to/some> # #<Pathname:path/to/some/file.rb> # # It doesn't access the filesystem. # def descend vs = [] ascend {|v| vs << v } vs.reverse_each {|v| yield v } nil end # Iterates over and yields a new Pathname object # for each element in the given path in ascending order. # # Pathname.new('/path/to/some/file.rb').ascend {|v| p v} # #<Pathname:/path/to/some/file.rb> # #<Pathname:/path/to/some> # #<Pathname:/path/to> # #<Pathname:/path> # #<Pathname:/> # # Pathname.new('path/to/some/file.rb').ascend {|v| p v} # #<Pathname:path/to/some/file.rb> # #<Pathname:path/to/some> # #<Pathname:path/to> # #<Pathname:path> # # It doesn't access the filesystem. # def ascend path = @path yield self while r = chop_basename(path) path, = r break if path.empty? yield self.class.new(del_trailing_separator(path)) end end # # Appends a pathname fragment to +self+ to produce a new Pathname object. # # p1 = Pathname.new("/usr") # Pathname:/usr # p2 = p1 + "bin/ruby" # Pathname:/usr/bin/ruby # p3 = p1 + "/etc/passwd" # Pathname:/etc/passwd # # This method doesn't access the file system; it is pure string manipulation. # def +(other) other = Pathname.new(other) unless Pathname === other Pathname.new(plus(@path, other.to_s)) end def plus(path1, path2) # -> path # :nodoc: prefix2 = path2 index_list2 = [] basename_list2 = [] while r2 = chop_basename(prefix2) prefix2, basename2 = r2 index_list2.unshift prefix2.length basename_list2.unshift basename2 end return path2 if prefix2 != '' prefix1 = path1 while true while !basename_list2.empty? && basename_list2.first == '.' index_list2.shift basename_list2.shift end break unless r1 = chop_basename(prefix1) prefix1, basename1 = r1 next if basename1 == '.' if basename1 == '..' || basename_list2.empty? || basename_list2.first != '..' prefix1 = prefix1 + basename1 break end index_list2.shift basename_list2.shift end r1 = chop_basename(prefix1) if !r1 && /#{SEPARATOR_PAT}/o =~ File.basename(prefix1) while !basename_list2.empty? && basename_list2.first == '..' index_list2.shift basename_list2.shift end end if !basename_list2.empty? suffix2 = path2[index_list2.first..-1] r1 ? File.join(prefix1, suffix2) : prefix1 + suffix2 else r1 ? prefix1 : File.dirname(prefix1) end end private :plus # # Joins the given pathnames onto +self+ to create a new Pathname object. # # path0 = Pathname.new("/usr") # Pathname:/usr # path0 = path0.join("bin/ruby") # Pathname:/usr/bin/ruby # # is the same as # path1 = Pathname.new("/usr") + "bin/ruby" # Pathname:/usr/bin/ruby # path0 == path1 # #=> true # def join(*args) args.unshift self result = args.pop result = Pathname.new(result) unless Pathname === result return result if result.absolute? args.reverse_each {|arg| arg = Pathname.new(arg) unless Pathname === arg result = arg + result return result if result.absolute? } result end # # Returns the children of the directory (files and subdirectories, not # recursive) as an array of Pathname objects. # # By default, the returned pathnames will have enough information to access # the files. If you set +with_directory+ to +false+, then the returned # pathnames will contain the filename only. # # For example: # pn = Pathname("/usr/lib/ruby/1.8") # pn.children # # -> [ Pathname:/usr/lib/ruby/1.8/English.rb, # Pathname:/usr/lib/ruby/1.8/Env.rb, # Pathname:/usr/lib/ruby/1.8/abbrev.rb, ... ] # pn.children(false) # # -> [ Pathname:English.rb, Pathname:Env.rb, Pathname:abbrev.rb, ... ] # # Note that the results never contain the entries +.+ and +..+ in # the directory because they are not children. # def children(with_directory=true) with_directory = false if @path == '.' result = [] Dir.foreach(@path) {|e| next if e == '.' || e == '..' if with_directory result << self.class.new(File.join(@path, e)) else result << self.class.new(e) end } result end # Iterates over the children of the directory # (files and subdirectories, not recursive). # # It yields Pathname object for each child. # # By default, the yielded pathnames will have enough information to access # the files. # # If you set +with_directory+ to +false+, then the returned pathnames will # contain the filename only. # # Pathname("/usr/local").each_child {|f| p f } # #=> #<Pathname:/usr/local/share> # # #<Pathname:/usr/local/bin> # # #<Pathname:/usr/local/games> # # #<Pathname:/usr/local/lib> # # #<Pathname:/usr/local/include> # # #<Pathname:/usr/local/sbin> # # #<Pathname:/usr/local/src> # # #<Pathname:/usr/local/man> # # Pathname("/usr/local").each_child(false) {|f| p f } # #=> #<Pathname:share> # # #<Pathname:bin> # # #<Pathname:games> # # #<Pathname:lib> # # #<Pathname:include> # # #<Pathname:sbin> # # #<Pathname:src> # # #<Pathname:man> # # Note that the results never contain the entries +.+ and +..+ in # the directory because they are not children. # # See Pathname#children # def each_child(with_directory=true, &b) children(with_directory).each(&b) end # # Returns a relative path from the given +base_directory+ to the receiver. # # If +self+ is absolute, then +base_directory+ must be absolute too. # # If +self+ is relative, then +base_directory+ must be relative too. # # This method doesn't access the filesystem. It assumes no symlinks. # # ArgumentError is raised when it cannot find a relative path. # def relative_path_from(base_directory) dest_directory = self.cleanpath.to_s base_directory = base_directory.cleanpath.to_s dest_prefix = dest_directory dest_names = [] while r = chop_basename(dest_prefix) dest_prefix, basename = r dest_names.unshift basename if basename != '.' end base_prefix = base_directory base_names = [] while r = chop_basename(base_prefix) base_prefix, basename = r base_names.unshift basename if basename != '.' end unless SAME_PATHS[dest_prefix, base_prefix] raise ArgumentError, "different prefix: #{dest_prefix.inspect} and #{base_directory.inspect}" end while !dest_names.empty? && !base_names.empty? && SAME_PATHS[dest_names.first, base_names.first] dest_names.shift base_names.shift end if base_names.include? '..' raise ArgumentError, "base_directory has ..: #{base_directory.inspect}" end base_names.fill('..') relpath_names = base_names + dest_names if relpath_names.empty? Pathname.new('.') else Pathname.new(File.join(*relpath_names)) end end end class Pathname # * Find * # # Iterates over the directory tree in a depth first manner, yielding a # Pathname for each file under "this" directory. # # Returns an Enumerator if no block is given. # # Since it is implemented by the standard library module Find, Find.prune can # be used to control the traversal. # # If +self+ is +.+, yielded pathnames begin with a filename in the # current directory, not +./+. # # See Find.find # def find # :yield: pathname return to_enum(__method__) unless block_given? require 'find' if @path == '.' Find.find(@path) {|f| yield self.class.new(f.sub(%r{\A\./}, '')) } else Find.find(@path) {|f| yield self.class.new(f) } end end end class Pathname # * FileUtils * # Creates a full path, including any intermediate directories that don't yet # exist. # # See FileUtils.mkpath and FileUtils.mkdir_p def mkpath require 'fileutils' FileUtils.mkpath(@path) nil end # Recursively deletes a directory, including all directories beneath it. # # See FileUtils.rm_r def rmtree # The name "rmtree" is borrowed from File::Path of Perl. # File::Path provides "mkpath" and "rmtree". require 'fileutils' FileUtils.rm_r(@path) nil end end

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