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 189
def *(other)
  result = @items * other
  case result
  when Array
    FileList.new.import(result)
  else
    result
  end
end

<<(obj) click to toggle source

# File lib/rake/file_list.rb, line 199
def <<(obj)
  resolve
  @items << Rake.from_pathname(obj)
  self
end

==(array) click to toggle source

A FileList is equal through array equality.

# File lib/rake/file_list.rb, line 167
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 160
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 << Rake.from_pathname(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 << Rake.from_pathname(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 183
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 206
def resolve
  if @pending
    @pending = false
    @pending_add.each do |fn| resolve_add(fn) end
    @pending_add = []
    resolve_exclude
  end
  self
end

to_a() click to toggle source

Return the internal array object.

# File lib/rake/file_list.rb, line 172
def to_a
  resolve
  @items
end

to_ary() click to toggle source

Return the internal array object.

# File lib/rake/file_list.rb, line 178
def to_ary
  to_a
end