class Rake::FileList

######################################################################### 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.

Constants

ARRAY_METHODS

List of array methods (that are not in Object) that need to be delegated.

DELEGATING_METHODS
MUST_DEFINE

List of additional methods that must be delegated.

MUST_NOT_DEFINE

List of methods that should not be delegated here (we define special versions of them explicitly below).

SPECIAL_RETURN

List of delegated methods that return new array values which need wrapping.

Public Class Methods

new(*patterns) { |self| ... } click to toggle source

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
# File lib/rake/file_list.rb, line 99
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

Public Instance Methods

*(other) click to toggle source

Redefine * to return either a string or a new file list.

# File lib/rake/file_list.rb, line 190
def *(other)
  result = @items * other
  case result
  when Array
    FileList.new.import(result)
  else
    result
  end
end
==(array) click to toggle source

Define equality.

# File lib/rake/file_list.rb, line 168
def ==(array)
  to_ary == array
end
add(*filenames)
Alias for: include
clear_exclude() click to toggle source

Clear all the exclude patterns so that we exclude nothing.

# File lib/rake/file_list.rb, line 161
def clear_exclude
  @exclude_patterns = []
  @exclude_procs = []
  self
end
exclude(*patterns, &block) click to toggle source

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']
# File lib/rake/file_list.rb, line 150
def exclude(*patterns, &block)
  patterns.each do |pat|
    @exclude_patterns << pat
  end
  @exclude_procs << block if block_given?
  resolve_exclude unless @pending
  self
end
include(*filenames) click to toggle source

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 )
# File lib/rake/file_list.rb, line 116
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
Also aliased as: add
is_a?(klass) click to toggle source

Lie about our class.

Calls superclass method
# File lib/rake/file_list.rb, line 184
def is_a?(klass)
  klass == Array || super(klass)
end
Also aliased as: kind_of?
kind_of?(klass)
Alias for: is_a?
resolve() click to toggle source

Resolve all the pending adds now.

# File lib/rake/file_list.rb, line 201
def resolve
  if @pending
    @pending = false
    @pending_add.each do |fn| resolve_add(fn) end
    @pending_add = []
    resolve_exclude
  end
  self
end
resolve_add(fn) click to toggle source
# File lib/rake/file_list.rb, line 211
    def resolve_add(fn)
      case fn
      when %r{[*?\[\{]}
        add_matching(fn)
      else
        self << fn
      end
    end
    private :resolve_add

    def resolve_exclude
      reject! { |fn| excluded_from_list?(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, "r", *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)
      FileList.glob(pattern).each do |fn|
        self << fn unless excluded_from_list?(fn)
      end
    end
    private :add_matching

    # Should the given file name be excluded from the list?
    #
    # NOTE: This method was formally named "exclude?", but Rails
    # introduced an exclude? method as an array method and setup a
    # conflict with file list. We renamed the method to avoid
    # confusion. If you were using "FileList#exclude?" in your user
    # code, you will need to update.
    def excluded_from_list?(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

      # Get a sorted list of files matching the pattern. This method
      # should be prefered to Dir[pattern] and Dir.glob(pattern) because
      # the files returned are guaranteed to be sorted.
      def glob(pattern, *args)
        Dir.glob(pattern, *args).sort
      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
to_a() click to toggle source

Return the internal array object.

# File lib/rake/file_list.rb, line 173
def to_a
  resolve
  @items
end
to_ary() click to toggle source

Return the internal array object.

# File lib/rake/file_list.rb, line 179
def to_ary
  to_a
end