From 29b7f2efcae1d4d980f5d3d71f8cd56ab6a3f89c Mon Sep 17 00:00:00 2001 From: gsinclair Date: Wed, 31 Dec 2003 05:47:45 +0000 Subject: * lib/pathname.rb: Completed documentation. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@5358 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- lib/pathname.rb | 373 ++++++++++++++++++++++++++++++++++++++++---------------- 1 file changed, 266 insertions(+), 107 deletions(-) (limited to 'lib') diff --git a/lib/pathname.rb b/lib/pathname.rb index d3c06bd70d..156a9de128 100644 --- a/lib/pathname.rb +++ b/lib/pathname.rb @@ -23,9 +23,9 @@ # # The value of this class is to manipulate file path information in a neater # way than standard Ruby provides. The examples below demonstrate the -# difference. *All* functionality from File, FileTest, +ftools+ and FileUtils -# is included, in an unsurprising way. It is essentially a facade for all of -# these, and more. +# difference. *All* functionality from File, FileTest, and some from Dir and +# FileUtils is included, in an unsurprising way. It is essentially a facade for +# all of these, and more. # # == Examples # @@ -33,7 +33,7 @@ # # require 'pathname' # p = Pathname.new("/usr/bin/ruby") -# size = p.size # XXX +# size = p.size # 27662 # isdir = p.directory? # false # dir = p.dirname # Pathname:/usr/bin # base = p.basename # Pathname:ruby @@ -45,7 +45,7 @@ # === Example 2: Using standard Ruby # # p = "/usr/bin/ruby" -# size = File.size(p) # XXX +# size = File.size(p) # 27662 # isdir = File.directory?(p) # false # dir = File.dirname(p) # "/usr/bin" # base = File.basename(p) # "ruby" @@ -73,41 +73,42 @@ # === Core methods # # These methods are effectively manipulating a String, because that's all a path -# is. They (mostly) don't access the filesystem. +# is. Except for #mountpoint?, #children, and #realpath, they don't access the +# filesystem. # -# - #cleanpath -# - #realpath (accesses filesystem) +# - + +# - #join # - #parent -# - #mountpoint? # - #root? # - #absolute? # - #relative? +# - #relative_path_from # - #each_filename -# - #+ -# - #join +# - #cleanpath +# - #realpath # - #children -# - #relative_path_from +# - #mountpoint? # # === File status predicate methods # # These methods are a facade for FileTest: # - #blockdev? # - #chardev? +# - #directory? # - #executable? # - #executable_real? # - #exist? -# - #grpowned? -# - #directory? # - #file? -# - #pipe? -# - #socket? +# - #grpowned? # - #owned? +# - #pipe? # - #readable? # - #readable_real? -# - #setuid? # - #setgid? +# - #setuid? # - #size # - #size? +# - #socket? # - #sticky? # - #symlink? # - #writable? @@ -169,10 +170,19 @@ # - #rmtree # - #unlink / #delete # +# +# == Method documentation +# +# As the above section shows, most of the methods in Pathname are facades. The +# documentation for these methods generally just says, for instance, "See +# FileTest.writable?", as you should be familiar with the original method +# anyway, and its documentation (e.g. through +ri+) will contain more +# information. In some cases, a brief description will follow. +# class Pathname # # Create a Pathname object from the given String (or String-like object). - # If +path+ contains a NUL character ("\0"), an ArgumentError is raised. + # If +path+ contains a NUL character (\0), an ArgumentError is raised. # def initialize(path) @path = path.to_str.dup @@ -185,8 +195,8 @@ class Pathname # # Compare this pathname with +other+. The comparison is string-based. - # Be aware that two different paths ("foo.txt" and "./foo.txt") can refer to - # the same file. + # Be aware that two different paths (foo.txt and ./foo.txt) + # can refer to the same file. # def ==(other) return false unless Pathname === other @@ -195,33 +205,37 @@ class Pathname alias === == alias eql? == + # Provides for comparing pathnames, case-sensitively. def <=>(other) return nil unless Pathname === other @path.tr('/', "\0") <=> other.to_s.tr('/', "\0") end - def hash + def hash # :nodoc: @path.hash end + # Return the path as a String. def to_s @path.dup end - # to_str is implemented for Pathname object usable with File.open, etc. + # to_str is implemented so Pathname objects are usable with File.open, etc. alias to_str to_s - def inspect + def inspect # :nodoc: "#<#{self.class}:#{@path}>" end - # cleanpath returns clean pathname of self which is without consecutive - # slashes and useless dots. # - # If true is given as the optional argument consider_symlink, - # symbolic links are considered. It makes more dots are retained. + # 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 #realpath. # - # cleanpath doesn't access actual filesystem. def cleanpath(consider_symlink=false) if consider_symlink cleanpath_conservative @@ -230,6 +244,10 @@ class Pathname end end + # + # Clean the path simply by resolving and removing excess "." and ".." entries. + # Nothing more, nothing less. + # def cleanpath_aggressive # :nodoc: # cleanpath_aggressive assumes: # * no symlink @@ -276,10 +294,12 @@ class Pathname Pathname.new(path) end - # realpath returns a real pathname of self in actual filesystem. - # The real pathname doesn't contain a symlink and useless dots. # - # It returns absolute pathname. + # Returns a real (absolute) pathname of +self+ in the actual filesystem. + # The real pathname doesn't contain symlinks or useless dots. + # + # No arguments should be given; the old behaviour is *obsoleted*. + # def realpath(*args) unless args.empty? warn "The argument for Pathname#realpath is obsoleted." @@ -341,57 +361,67 @@ class Pathname end end - # parent method returns parent directory. + # #parent returns the parent directory. # - # This is same as self + '..'. + # This is same as self + '..'. def parent self + '..' end - # mountpoint? method returns true if self points a mountpoint. + # #mountpoint? 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 + stat1.dev != stat2.dev rescue Errno::ENOENT false end end - # root? method is a predicate for root directory. - # I.e. it returns true if the pathname consists of consecutive slashes. # - # It doesn't access actual filesystem. - # So it may return false for some pathnames - # which points root such as "/usr/..". + # #root? is a predicate for root directories. I.e. it returns +true+ if the + # pathname consists of consecutive slashes. + # + # It doesn't access actual filesystem. So it may return +false+ for some + # pathnames which points to roots such as /usr/... + # def root? %r{\A/+\z} =~ @path ? true : false end - # absolute? method is a predicate for absolute pathname. - # It returns true if self is beginning with a slash. + # Predicate method for testing whether a path is absolute. + # It returns +true+ if the pathname begins with a slash. def absolute? %r{\A/} =~ @path ? true : false end - # relative? method is a predicate for relative pathname. - # It returns true unless self is beginning with a slash. + # The opposite of #absolute? def relative? !absolute? end - # each_filename iterates over self for each filename components. - def each_filename + # + # Iterates over each component of the path. + # + # Pathname.new("/usr/bin/ruby").each_filename + # # yields "usr", "bin", and "ruby". + # + def each_filename # :yield: s @path.scan(%r{[^/]+}) { yield $& } end - # Pathname#+ concatenates self and an argument. - # I.e. a result is basically same as the argument but the base directory - # is changed to self if the argument is relative. # - # Pathname#+ doesn't access actual filesystem. + # Pathname#+ appends a pathname fragment to this one 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 @@ -421,9 +451,12 @@ class Pathname end end + # # Pathname#join joins pathnames. # - # path0.join(path1, ... pathN) is same as path0 + path1 + ... + pathN. + # path0.join(path1, ..., pathN) is the same as + # path0 + path1 + ... + pathN. + # def join(*args) args.unshift self result = args.pop @@ -437,22 +470,27 @@ class Pathname result end - # Pathname#children returns the children of the directory as an array of - # pathnames. # - # By default, the returned pathname can be used to access the corresponding - # file in the directory. - # This is because the pathname contains self as a prefix unless self is `.'. + # 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. # - # If false is given for the optional argument `with_directory', - # just filenames of children is returned. - # In this case, the returned pathname cannot be used directly to access the - # corresponding file when self doesn't point working directory. + # For example: + # p = Pathname("/usr/lib/ruby/1.8") + # p.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, ... ] + # p.children(false) + # # -> [ Pathname:English.rb, Pathname:Env.rb, Pathname:abbrev.rb, ... ] # - # Note that the result never contain the entry `.' and `..' in the directory - # because they are not child. + # Note that the result never contain the entries . and .. in + # the directory because they are not children. + # + # This method has existed since 1.8.1. # - # This method is exist since 1.8.1. def children(with_directory=true) with_directory = false if @path == '.' result = [] @@ -467,17 +505,17 @@ class Pathname result end - # Pathname#relative_path_from returns a relative path from the argument to - # self. - # If self is absolute, the argument must be absolute too. - # If self is relative, the argument must be relative too. # - # relative_path_from doesn't access actual filesystem. - # It assumes no symlinks. + # #relative_path_from returns a relative path from the argument to the + # receiver. If +self+ is absolute, the argument must be absolute too. If + # +self+ is relative, the argument must be relative too. + # + # #relative_path_from doesn't access the filesystem. It assumes no symlinks. # # ArgumentError is raised when it cannot find a relative path. # - # This method is exist since 1.8.1. + # This method has existed since 1.8.1. + # def relative_path_from(base_directory) if self.absolute? != base_directory.absolute? raise ArgumentError, @@ -518,59 +556,121 @@ end class Pathname # * IO * - # Pathname#each_line iterates over lines of the file. - # It's yields a String object for each line. # - # This method is exist since 1.8.1. - def each_line(*args, &block) IO.foreach(@path, *args, &block) end - - # Pathname#foreachline is obsoleted at 1.8.1. + # #each_line iterates over the line in the file. It yields a String object + # for each line. + # + # This method has existed since 1.8.1. # - def foreachline(*args, &block) # compatibility to 1.8.0. obsoleted. + def each_line(*args, &block) # :yield: line + IO.foreach(@path, *args, &block) + end + + # Pathname#foreachline is *obsoleted* at 1.8.1. Use #each_line. + def foreachline(*args, &block) warn "Pathname#foreachline is obsoleted. Use Pathname#each_line." each_line(*args, &block) end + # See IO.read. Returns all the bytes from the file, or the first +N+ + # if specified. def read(*args) IO.read(@path, *args) end + + # See IO.readlines. Returns all the lines from the file. def readlines(*args) IO.readlines(@path, *args) end + + # See IO.sysopen. def sysopen(*args) IO.sysopen(@path, *args) end end class Pathname # * File * + + # See File.atime. Returns last access time. def atime() File.atime(@path) end + + # See File.ctime. Returns last (directory entry, not file) change time. def ctime() File.ctime(@path) end + + # See File.mtime. Returns last modification time. def mtime() File.mtime(@path) end + + # See File.chmod. Changes permissions. def chmod(mode) File.chmod(mode, @path) end + + # See File.chmod. def lchmod(mode) File.chmod(mode, @path) end + + # See File.chown. Change owner and group of file. def chown(owner, group) File.chown(owner, group, @path) end + + # See File.lchown. def lchown(owner, group) File.lchown(owner, group, @path) end + + # See File.fnmatch. Return +true+ if the receiver matches the given + # pattern. def fnmatch(pattern, *args) File.fnmatch(pattern, @path, *args) end + + # See File.fnmatch? (same as #fnmatch). def fnmatch?(pattern, *args) File.fnmatch?(pattern, @path, *args) end + + # See File.ftype. Returns "type" of file ("file", "directory", + # etc). def ftype() File.ftype(@path) end + + # See File.link. Creates a hard link. def make_link(old) File.link(old, @path) end - def open(*args, &block) File.open(@path, *args, &block) end + + # See File.open. Opens the file for reading or writing. + def open(*args, &block) # :yield: file + File.open(@path, *args, &block) + end + + # See File.readlink. Read symbolic link. def readlink() Pathname.new(File.readlink(@path)) end + + # See File.rename. Rename the file. def rename(to) File.rename(@path, to) end + + # See File.stat. Returns a File::Stat object. def stat() File.stat(@path) end + + # See File.lstat. def lstat() File.lstat(@path) end + + # See File.symlink. Creates a symbolic link. def make_symlink(old) File.symlink(old, @path) end + + # See File.truncate. Truncate the file to +length+ bytes. def truncate(length) File.truncate(@path, length) end + + # See File.utime. Update the access and modification times. def utime(atime, mtime) File.utime(atime, mtime, @path) end + + # See File.basename. Returns the last component of the path. def basename(*args) Pathname.new(File.basename(@path, *args)) end + + # See File.dirname. Returns all but the last component of the path. def dirname() Pathname.new(File.dirname(@path)) end + + # See File.extname. Returns the file's extension. def extname() File.extname(@path) end + + # See File.expand_path. def expand_path(*args) Pathname.new(File.expand_path(@path, *args)) end + + # See File.split. Returns the #dirname and the #basename in an + # Array. def split() File.split(@path).map {|f| Pathname.new(f) } end - # Pathname#link is confusing and obsoleted because the receiver/argument + # Pathname#link is confusing and *obsoleted* because the receiver/argument # order is inverted to corresponding system call. def link(old) warn 'Pathname#link is obsoleted. Use Pathname#make_link.' File.link(old, @path) end - # Pathname#symlink is confusing and obsoleted because the receiver/argument + # Pathname#symlink is confusing and *obsoleted* because the receiver/argument # order is inverted to corresponding system call. def symlink(old) warn 'Pathname#symlink is obsoleted. Use Pathname#make_symlink.' @@ -580,33 +680,78 @@ end class Pathname # * FileTest * + + # See FileTest.blockdev?. def blockdev?() FileTest.blockdev?(@path) end + + # See FileTest.chardev?. def chardev?() FileTest.chardev?(@path) end + + # See FileTest.executable?. def executable?() FileTest.executable?(@path) end + + # See FileTest.executable_real?. def executable_real?() FileTest.executable_real?(@path) end + + # See FileTest.exist?. def exist?() FileTest.exist?(@path) end + + # See FileTest.grpowned?. def grpowned?() FileTest.grpowned?(@path) end + + # See FileTest.directory?. def directory?() FileTest.directory?(@path) end + + # See FileTest.file?. def file?() FileTest.file?(@path) end + + # See FileTest.pipe?. def pipe?() FileTest.pipe?(@path) end + + # See FileTest.socket?. def socket?() FileTest.socket?(@path) end + + # See FileTest.owned?. def owned?() FileTest.owned?(@path) end + + # See FileTest.readable?. def readable?() FileTest.readable?(@path) end + + # See FileTest.readable_real?. def readable_real?() FileTest.readable_real?(@path) end + + # See FileTest.setuid?. def setuid?() FileTest.setuid?(@path) end + + # See FileTest.setgid?. def setgid?() FileTest.setgid?(@path) end + + # See FileTest.size. def size() FileTest.size(@path) end + + # See FileTest.size?. def size?() FileTest.size?(@path) end + + # See FileTest.sticky?. def sticky?() FileTest.sticky?(@path) end + + # See FileTest.symlink?. def symlink?() FileTest.symlink?(@path) end + + # See FileTest.writable?. def writable?() FileTest.writable?(@path) end + + # See FileTest.writable_real?. def writable_real?() FileTest.writable_real?(@path) end + + # See FileTest.zero?. def zero?() FileTest.zero?(@path) end end class Pathname # * Dir * - def Pathname.glob(*args) + # See Dir.glob. Returns or yields Pathname objects. + def Pathname.glob(*args) # :yield: p if block_given? Dir.glob(*args) {|f| yield Pathname.new(f) } else @@ -614,55 +759,65 @@ class Pathname # * Dir * end end + # See Dir.getwd. Returns the current working directory as a Pathname. def Pathname.getwd() Pathname.new(Dir.getwd) end class << self; alias pwd getwd end - # Pathname#chdir is obsoleted at 1.8.1. - # - def chdir(&block) # compatibility to 1.8.0. + # Pathname#chdir is *obsoleted* at 1.8.1. + def chdir(&block) warn "Pathname#chdir is obsoleted. Use Dir.chdir." Dir.chdir(@path, &block) end - # Pathname#chroot is obsoleted at 1.8.1. - # - def chroot # compatibility to 1.8.0. + # Pathname#chroot is *obsoleted* at 1.8.1. + def chroot warn "Pathname#chroot is obsoleted. Use Dir.chroot." Dir.chroot(@path) end - def rmdir() Dir.rmdir(@path) end + # Return the entries (files and subdirectories) in the directory, each as a + # Pathname object. def entries() Dir.entries(@path).map {|f| Pathname.new(f) } end - # Pathname#each_entry iterates over entries of the directory. - # It's yields Pathname objects for each entry. + # Iterates over the entries (files and subdirectories) in the directory. It + # yields a Pathname object for each entry. # - # This method is exist since 1.8.1. - def each_entry(&block) Dir.foreach(@path) {|f| yield Pathname.new(f) } end + # This method has existed since 1.8.1. + def each_entry(&block) # :yield: p + Dir.foreach(@path) {|f| yield Pathname.new(f) } + end - # Pathname#dir_foreach is obsoleted at 1.8.1. - # - def dir_foreach(*args, &block) # compatibility to 1.8.0. obsoleted. + # Pathname#dir_foreach is *obsoleted* at 1.8.1. + def dir_foreach(*args, &block) warn "Pathname#dir_foreach is obsoleted. Use Pathname#each_entry." each_entry(*args, &block) end + # See Dir.mkdir. Create the referenced directory. def mkdir(*args) Dir.mkdir(@path, *args) end - def opendir(&block) Dir.open(@path, &block) end + + # See Dir.rmdir. Remove the referenced directory. + def rmdir() Dir.rmdir(@path) end + + # See Dir.open. + def opendir(&block) # :yield: dir + Dir.open(@path, &block) + end end class Pathname # * Find * - # Pathname#find is a iterator to traverse directory tree in depth first - # manner. It yields a pathname for each file under the directory which - # is pointed by self. # - # Since it is implemented by find.rb, Find.prune can be used to control the - # traverse. + # Pathname#find is an iterator to traverse a directory tree in a depth first + # manner. It yields a Pathname for each file under "this" directory. # - # If self is `.', yielded pathnames begin with a filename in the current - # directory, not `./'. - def find(&block) + # Since it is implemented by find.rb, Find.prune can be used + # to control the traverse. + # + # If +self+ is ., yielded pathnames begin with a filename in the + # current directory, not ./. + # + def find(&block) # :yield: p require 'find' if @path == '.' Find.find(@path) {|f| yield Pathname.new(f.sub(%r{\A\./}, '')) } @@ -674,12 +829,15 @@ end class Pathname # * FileUtils * + # See FileUtils.mkpath. Creates a full path, including any + # intermediate directories that don't yet exist. def mkpath require 'fileutils' FileUtils.mkpath(@path) nil end + # See FileUtils.rm_r. Deletes a directory and all beneath it. def rmtree # The name "rmtree" is borrowed from File::Path of Perl. # File::Path provides "mkpath" and "rmtree". @@ -691,6 +849,8 @@ end class Pathname # * mixed * + # Removes a file or directory, using File.unlink or + # Dir.unlink as necessary. def unlink() if FileTest.directory? @path Dir.unlink @path @@ -700,9 +860,8 @@ class Pathname # * mixed * end alias delete unlink - # This method is obsoleted at 1.8.1. - # - def foreach(*args, &block) # compatibility to 1.8.0. obsoleted. + # This method is *obsoleted* at 1.8.1. Use #each_line or #each_entry. + def foreach(*args, &block) warn "Pathname#foreach is obsoleted. Use each_line or each_entry." if FileTest.directory? @path # For polymorphism between Dir.foreach and IO.foreach, -- cgit v1.2.3