In Files

  • rake/file_list.rb

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) 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 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 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 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 rake/file_list.rb, line 167
def ==(array)
  to_ary == array
end
add(*filenames) click to toggle source
Alias for: include
clear_exclude() click to toggle source

Clear all the exclude patterns so that we exclude nothing.

 
               # File 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 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 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.

 
               # File rake/file_list.rb, line 183
def is_a?(klass)
  klass == Array || super(klass)
end
Also aliased as: kind_of?
kind_of?(klass) click to toggle source
Alias for: is_a?
resolve() click to toggle source

Resolve all the pending adds now.

 
               # File 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 rake/file_list.rb, line 172
def to_a
  resolve
  @items
end
to_ary() click to toggle source

Return the internal array object.

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

Commenting is here to help enhance the documentation. For example, code samples, or clarification of the documentation.

If you have questions about Ruby or the documentation, please post to one of the Ruby mailing lists. You will get better, faster, help that way.

If you wish to post a correction of the docs, please do so, but also file bug report so that it can be corrected for the next release. Thank you.

If you want to help improve the Ruby documentation, please visit Documenting-ruby.org.

blog comments powered by Disqus