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-rw-r--r--jni/ruby/ext/pathname/lib/pathname.rb579
1 files changed, 579 insertions, 0 deletions
diff --git a/jni/ruby/ext/pathname/lib/pathname.rb b/jni/ruby/ext/pathname/lib/pathname.rb
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+#
+# = 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
+ #
+ # # / is aliased to +.
+ # p4 = p1 / "bin/ruby" # Pathname:/usr/bin/ruby
+ # p5 = 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
+ alias / +
+
+ 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)
+ return self if args.empty?
+ 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?
+ }
+ self + 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(ignore_error: true) # :yield: pathname
+ return to_enum(__method__, ignore_error: ignore_error) unless block_given?
+ require 'find'
+ if @path == '.'
+ Find.find(@path, ignore_error: ignore_error) {|f| yield self.class.new(f.sub(%r{\A\./}, '')) }
+ else
+ Find.find(@path, ignore_error: ignore_error) {|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
+