* lib/rake: Import Rake 0.9.2

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32217 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 403 insertions, 0 deletions

diff --git a/lib/rake/file_list.rb b/lib/rake/file_list.rb
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+require 'rake/cloneable'
+require 'rake/file_utils_ext'
+require 'rake/pathmap'
+
+######################################################################
+module Rake
+
+  # #########################################################################
+  # A FileList is essentially an array with a few helper methods defined to
+  # make file manipulation a bit easier.
+  #
+  # FileLists are lazy.  When given a list of glob patterns for possible files
+  # to be included in the file list, instead of searching the file structures
+  # to find the files, a FileList holds the pattern for latter use.
+  #
+  # This allows us to define a number of FileList to match any number of
+  # files, but only search out the actual files when then FileList itself is
+  # actually used.  The key is that the first time an element of the
+  # FileList/Array is requested, the pending patterns are resolved into a real
+  # list of file names.
+  #
+  class FileList
+
+    include Cloneable
+
+    # == Method Delegation
+    #
+    # The lazy evaluation magic of FileLists happens by implementing all the
+    # array specific methods to call +resolve+ before delegating the heavy
+    # lifting to an embedded array object (@items).
+    #
+    # In addition, there are two kinds of delegation calls.  The regular kind
+    # delegates to the @items array and returns the result directly.  Well,
+    # almost directly.  It checks if the returned value is the @items object
+    # itself, and if so will return the FileList object instead.
+    #
+    # The second kind of delegation call is used in methods that normally
+    # return a new Array object.  We want to capture the return value of these
+    # methods and wrap them in a new FileList object.  We enumerate these
+    # methods in the +SPECIAL_RETURN+ list below.
+
+    # List of array methods (that are not in +Object+) that need to be
+    # delegated.
+    ARRAY_METHODS = (Array.instance_methods - Object.instance_methods).map { |n| n.to_s }
+
+    # List of additional methods that must be delegated.
+    MUST_DEFINE = %w[to_a inspect <=>]
+
+    # List of methods that should not be delegated here (we define special
+    # versions of them explicitly below).
+    MUST_NOT_DEFINE = %w[to_a to_ary partition *]
+
+    # List of delegated methods that return new array values which need
+    # wrapping.
+    SPECIAL_RETURN = %w[
+      map collect sort sort_by select find_all reject grep
+      compact flatten uniq values_at
+      + - & |
+    ]
+
+    DELEGATING_METHODS = (ARRAY_METHODS + MUST_DEFINE - MUST_NOT_DEFINE).collect{ |s| s.to_s }.sort.uniq
+
+    # Now do the delegation.
+    DELEGATING_METHODS.each_with_index do |sym, i|
+      if SPECIAL_RETURN.include?(sym)
+        ln = __LINE__+1
+        class_eval %{
+          def #{sym}(*args, &block)
+            resolve
+            result = @items.send(:#{sym}, *args, &block)
+            FileList.new.import(result)
+          end
+        }, __FILE__, ln
+      else
+        ln = __LINE__+1
+        class_eval %{
+          def #{sym}(*args, &block)
+            resolve
+            result = @items.send(:#{sym}, *args, &block)
+            result.object_id == @items.object_id ? self : result
+          end
+        }, __FILE__, ln
+      end
+    end
+
+    # Create a file list from the globbable patterns given.  If you wish to
+    # perform multiple includes or excludes at object build time, use the
+    # "yield self" pattern.
+    #
+    # Example:
+    #   file_list = FileList.new('lib/**/*.rb', 'test/test*.rb')
+    #
+    #   pkg_files = FileList.new('lib/**/*') do |fl|
+    #     fl.exclude(/\bCVS\b/)
+    #   end
+    #
+    def initialize(*patterns)
+      @pending_add = []
+      @pending = false
+      @exclude_patterns = DEFAULT_IGNORE_PATTERNS.dup
+      @exclude_procs = DEFAULT_IGNORE_PROCS.dup
+      @items = []
+      patterns.each { |pattern| include(pattern) }
+      yield self if block_given?
+    end
+
+    # Add file names defined by glob patterns to the file list.  If an array
+    # is given, add each element of the array.
+    #
+    # Example:
+    #   file_list.include("*.java", "*.cfg")
+    #   file_list.include %w( math.c lib.h *.o )
+    #
+    def include(*filenames)
+      # TODO: check for pending
+      filenames.each do |fn|
+        if fn.respond_to? :to_ary
+          include(*fn.to_ary)
+        else
+          @pending_add << fn
+        end
+      end
+      @pending = true
+      self
+    end
+    alias :add :include
+
+    # Register a list of file name patterns that should be excluded from the
+    # list.  Patterns may be regular expressions, glob patterns or regular
+    # strings.  In addition, a block given to exclude will remove entries that
+    # return true when given to the block.
+    #
+    # Note that glob patterns are expanded against the file system. If a file
+    # is explicitly added to a file list, but does not exist in the file
+    # system, then an glob pattern in the exclude list will not exclude the
+    # file.
+    #
+    # Examples:
+    #   FileList['a.c', 'b.c'].exclude("a.c") => ['b.c']
+    #   FileList['a.c', 'b.c'].exclude(/^a/)  => ['b.c']
+    #
+    # If "a.c" is a file, then ...
+    #   FileList['a.c', 'b.c'].exclude("a.*") => ['b.c']
+    #
+    # If "a.c" is not a file, then ...
+    #   FileList['a.c', 'b.c'].exclude("a.*") => ['a.c', 'b.c']
+    #
+    def exclude(*patterns, &block)
+      patterns.each do |pat|
+        @exclude_patterns << pat
+      end
+      if block_given?
+        @exclude_procs << block
+      end
+      resolve_exclude if ! @pending
+      self
+    end
+
+
+    # Clear all the exclude patterns so that we exclude nothing.
+    def clear_exclude
+      @exclude_patterns = []
+      @exclude_procs = []
+      self
+    end
+
+    # Define equality.
+    def ==(array)
+      to_ary == array
+    end
+
+    # Return the internal array object.
+    def to_a
+      resolve
+      @items
+    end
+
+    # Return the internal array object.
+    def to_ary
+      to_a
+    end
+
+    # Lie about our class.
+    def is_a?(klass)
+      klass == Array || super(klass)
+    end
+    alias kind_of? is_a?
+
+    # Redefine * to return either a string or a new file list.
+    def *(other)
+      result = @items * other
+      case result
+      when Array
+        FileList.new.import(result)
+      else
+        result
+      end
+    end
+
+    # Resolve all the pending adds now.
+    def resolve
+      if @pending
+        @pending = false
+        @pending_add.each do |fn| resolve_add(fn) end
+        @pending_add = []
+        resolve_exclude
+      end
+      self
+    end
+
+    def resolve_add(fn)
+      case fn
+      when %r{[*?\[\{]}
+        add_matching(fn)
+      else
+        self << fn
+      end
+    end
+    private :resolve_add
+
+    def resolve_exclude
+      reject! { |fn| exclude?(fn) }
+      self
+    end
+    private :resolve_exclude
+
+    # Return a new FileList with the results of running +sub+ against each
+    # element of the original list.
+    #
+    # Example:
+    #   FileList['a.c', 'b.c'].sub(/\.c$/, '.o')  => ['a.o', 'b.o']
+    #
+    def sub(pat, rep)
+      inject(FileList.new) { |res, fn| res << fn.sub(pat,rep) }
+    end
+
+    # Return a new FileList with the results of running +gsub+ against each
+    # element of the original list.
+    #
+    # Example:
+    #   FileList['lib/test/file', 'x/y'].gsub(/\//, "\\")
+    #      => ['lib\\test\\file', 'x\\y']
+    #
+    def gsub(pat, rep)
+      inject(FileList.new) { |res, fn| res << fn.gsub(pat,rep) }
+    end
+
+    # Same as +sub+ except that the original file list is modified.
+    def sub!(pat, rep)
+      each_with_index { |fn, i| self[i] = fn.sub(pat,rep) }
+      self
+    end
+
+    # Same as +gsub+ except that the original file list is modified.
+    def gsub!(pat, rep)
+      each_with_index { |fn, i| self[i] = fn.gsub(pat,rep) }
+      self
+    end
+
+    # Apply the pathmap spec to each of the included file names, returning a
+    # new file list with the modified paths.  (See String#pathmap for
+    # details.)
+    def pathmap(spec=nil)
+      collect { |fn| fn.pathmap(spec) }
+    end
+
+    # Return a new FileList with <tt>String#ext</tt> method applied to
+    # each member of the array.
+    #
+    # This method is a shortcut for:
+    #
+    #    array.collect { |item| item.ext(newext) }
+    #
+    # +ext+ is a user added method for the Array class.
+    def ext(newext='')
+      collect { |fn| fn.ext(newext) }
+    end
+
+
+    # Grep each of the files in the filelist using the given pattern. If a
+    # block is given, call the block on each matching line, passing the file
+    # name, line number, and the matching line of text.  If no block is given,
+    # a standard emacs style file:linenumber:line message will be printed to
+    # standard out.  Returns the number of matched items.
+    def egrep(pattern, *options)
+      matched = 0
+      each do |fn|
+        begin
+          open(fn, "rb", *options) do |inf|
+            count = 0
+            inf.each do |line|
+              count += 1
+              if pattern.match(line)
+                matched += 1
+                if block_given?
+                  yield fn, count, line
+                else
+                  puts "#{fn}:#{count}:#{line}"
+                end
+              end
+            end
+          end
+        rescue StandardError => ex
+          $stderr.puts "Error while processing '#{fn}': #{ex}"
+        end
+      end
+      matched
+    end
+
+    # Return a new file list that only contains file names from the current
+    # file list that exist on the file system.
+    def existing
+      select { |fn| File.exist?(fn) }
+    end
+
+    # Modify the current file list so that it contains only file name that
+    # exist on the file system.
+    def existing!
+      resolve
+      @items = @items.select { |fn| File.exist?(fn) }
+      self
+    end
+
+    # FileList version of partition.  Needed because the nested arrays should
+    # be FileLists in this version.
+    def partition(&block)       # :nodoc:
+      resolve
+      result = @items.partition(&block)
+      [
+        FileList.new.import(result[0]),
+        FileList.new.import(result[1]),
+      ]
+    end
+
+    # Convert a FileList to a string by joining all elements with a space.
+    def to_s
+      resolve
+      self.join(' ')
+    end
+
+    # Add matching glob patterns.
+    def add_matching(pattern)
+      Dir[pattern].each do |fn|
+        self << fn unless exclude?(fn)
+      end
+    end
+    private :add_matching
+
+    # Should the given file name be excluded?
+    def exclude?(fn)
+      return true if @exclude_patterns.any? do |pat|
+        case pat
+        when Regexp
+          fn =~ pat
+        when /[*?]/
+          File.fnmatch?(pat, fn, File::FNM_PATHNAME)
+        else
+          fn == pat
+        end
+      end
+      @exclude_procs.any? { |p| p.call(fn) }
+    end
+
+    DEFAULT_IGNORE_PATTERNS = [
+      /(^|[\/\\])CVS([\/\\]|$)/,
+      /(^|[\/\\])\.svn([\/\\]|$)/,
+      /\.bak$/,
+      /~$/
+    ]
+    DEFAULT_IGNORE_PROCS = [
+      proc { |fn| fn =~ /(^|[\/\\])core$/ && ! File.directory?(fn) }
+    ]
+
+    def import(array)
+      @items = array
+      self
+    end
+
+    class << self
+      # Create a new file list including the files listed. Similar to:
+      #
+      #   FileList.new(*args)
+      def [](*args)
+        new(*args)
+      end
+    end
+  end
+end
+
+module Rake
+  class << self
+
+    # Yield each file or directory component.
+    def each_dir_parent(dir)    # :nodoc:
+      old_length = nil
+      while dir != '.' && dir.length != old_length
+        yield(dir)
+        old_length = dir.length
+        dir = File.dirname(dir)
+      end
+    end
+  end
+end # module Rake