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.
DEFAULT_IGNORE_PATTERNS
DEFAULT_IGNORE_PROCS
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

[](*args) click to toggle source

Create a new file list including the files listed. Similar to:

FileList.new(*args)

# File lib/rake/file_list.rb, line 393
def [](*args)
  new(*args)
end

glob(pattern, *args) click to toggle source

Get a sorted list of files matching the pattern. This method should be preferred to Dir and Dir.glob because the files returned are guaranteed to be sorted.

# File lib/rake/file_list.rb, line 400
def glob(pattern, *args)
  Dir.glob(pattern, *args).sort
end

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

egrep(pattern, *options) { |fn, count, line| ... } click to toggle source

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.

# File lib/rake/file_list.rb, line 289
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

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

excluded_from_list?(fn) click to toggle source

Should the given file name be excluded from the list?

NOTE: This method was formerly 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.

# File lib/rake/file_list.rb, line 360
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

existing() click to toggle source

Return a new file list that only contains file names from the current file list that exist on the file system.

# File lib/rake/file_list.rb, line 316
def existing
  select { |fn| File.exist?(fn) }
end

existing!() click to toggle source

Modify the current file list so that it contains only file name that exist on the file system.

# File lib/rake/file_list.rb, line 322
def existing!
  resolve
  @items = @items.select { |fn| File.exist?(fn) }
  self
end

ext(newext='') click to toggle source

Return a new FileList with String#ext 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.

# File lib/rake/file_list.rb, line 280
def ext(newext='')
  collect { |fn| fn.ext(newext) }
end

gsub(pat, rep) click to toggle source

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']

# File lib/rake/file_list.rb, line 249
def gsub(pat, rep)
  inject(FileList.new) { |res, fn| res << fn.gsub(pat, rep) }
end

gsub!(pat, rep) click to toggle source

Same as gsub except that the original file list is modified.

# File lib/rake/file_list.rb, line 260
def gsub!(pat, rep)
  each_with_index { |fn, i| self[i] = fn.gsub(pat, rep) }
  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 Object#is_a?

# 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?

pathmap(spec=nil) click to toggle source

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.)

# File lib/rake/file_list.rb, line 268
def pathmap(spec=nil)
  collect { |fn| fn.pathmap(spec) }
end

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

sub(pat, rep) click to toggle source

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']

# File lib/rake/file_list.rb, line 238
def sub(pat, rep)
  inject(FileList.new) { |res, fn| res << fn.sub(pat, rep) }
end

sub!(pat, rep) click to toggle source

Same as sub except that the original file list is modified.

# File lib/rake/file_list.rb, line 254
def sub!(pat, rep)
  each_with_index { |fn, i| self[i] = fn.sub(pat, rep) }
  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

to_s() click to toggle source

Convert a FileList to a string by joining all elements with a space.

# File lib/rake/file_list.rb, line 340
def to_s
  resolve
  self.join(' ')
end

Private Instance Methods

add_matching(pattern) click to toggle source

Add matching glob patterns.

# File lib/rake/file_list.rb, line 346
def add_matching(pattern)
  FileList.glob(pattern).each do |fn|
    self << fn unless excluded_from_list?(fn)
  end
end