Class: Rake::FileList

Inherits:
Object
  • Object
show all
Includes:
Cloneable
Defined in:
lib/rake/file_list.rb

Overview

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.

Constant Summary collapse

ARRAY_METHODS =

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

(Array.instance_methods - Object.instance_methods).
map { |n| n.to_s }
MUST_DEFINE =

List of additional methods that must be delegated.

%w[inspect <=>]
MUST_NOT_DEFINE =

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

%w[to_a to_ary partition *]
SPECIAL_RETURN =

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

%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).
map { |s| s.to_s }.sort.uniq
DEFAULT_IGNORE_PATTERNS = 
[
  /(^|[\/\\])CVS([\/\\]|$)/,
  /(^|[\/\\])\.svn([\/\\]|$)/,
  /\.bak$/,
  /~$/
]
DEFAULT_IGNORE_PROCS = 
[
  proc { |fn| fn =~ /(^|[\/\\])core$/ && ! File.directory?(fn) }
]

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Cloneable

#initialize_copy

Constructor Details

#initialize(*patterns) {|_self| ... } ⇒ FileList

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

Yields:

  • (_self)

Yield Parameters:



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# 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

Class Method Details

.[](*args) ⇒ Object

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

FileList.new(*args)



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# File 'lib/rake/file_list.rb', line 387

def [](*args)
  new(*args)
end

.glob(pattern, *args) ⇒ Object

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



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# File 'lib/rake/file_list.rb', line 394

def glob(pattern, *args)
  Dir.glob(pattern, *args).sort
end

Instance Method Details

#*(other) ⇒ Object

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



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# 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

#==(array) ⇒ Object

A FileList is equal through array equality.



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# File 'lib/rake/file_list.rb', line 167

def ==(array)
  to_ary == array
end

#clear_exclude ⇒ Object

Clear all the exclude patterns so that we exclude nothing.



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# File 'lib/rake/file_list.rb', line 160

def clear_exclude
  @exclude_patterns = []
  @exclude_procs = []
  self
end

#egrep(pattern, *options) ⇒ Object

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.



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# File 'lib/rake/file_list.rb', line 283

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) ⇒ Object

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']



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# 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

#excluded_from_list?(fn) ⇒ Boolean

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.

Returns:

  • (Boolean) 


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# File 'lib/rake/file_list.rb', line 354

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 ⇒ Object

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



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# File 'lib/rake/file_list.rb', line 310

def existing
  select { |fn| File.exist?(fn) }
end

#existing! ⇒ Object

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



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# File 'lib/rake/file_list.rb', line 316

def existing!
  resolve
  @items = @items.select { |fn| File.exist?(fn) }
  self
end

#ext(newext = '') ⇒ Object

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.



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# File 'lib/rake/file_list.rb', line 274

def ext(newext='')
  collect { |fn| fn.ext(newext) }
end

#gsub(pat, rep) ⇒ Object

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']



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# File 'lib/rake/file_list.rb', line 243

def gsub(pat, rep)
  inject(FileList.new) { |res, fn| res << fn.gsub(pat, rep) }
end

#gsub!(pat, rep) ⇒ Object

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



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# File 'lib/rake/file_list.rb', line 254

def gsub!(pat, rep)
  each_with_index { |fn, i| self[i] = fn.gsub(pat, rep) }
  self
end

#import(array) ⇒ Object

:nodoc:



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# File 'lib/rake/file_list.rb', line 378

def import(array) # :nodoc:
  @items = array
  self
end

#include(*filenames) ⇒ Object Also known as: add

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 )



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# 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

#is_a?(klass) ⇒ Boolean Also known as: kind_of?

Lie about our class.

Returns:

  • (Boolean) 


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# File 'lib/rake/file_list.rb', line 183

def is_a?(klass)
  klass == Array || super(klass)
end

#partition(&block) ⇒ Object

FileList version of partition. Needed because the nested arrays should be FileLists in this version.



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# File 'lib/rake/file_list.rb', line 324

def partition(&block)       # :nodoc:
  resolve
  result = @items.partition(&block)
  [
    FileList.new.import(result[0]),
    FileList.new.import(result[1]),
  ]
end

#pathmap(spec = nil) ⇒ Object

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.)



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# File 'lib/rake/file_list.rb', line 262

def pathmap(spec=nil)
  collect { |fn| fn.pathmap(spec) }
end

#resolve ⇒ Object

Resolve all the pending adds now.



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# File 'lib/rake/file_list.rb', line 200

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) ⇒ Object

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']



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# File 'lib/rake/file_list.rb', line 232

def sub(pat, rep)
  inject(FileList.new) { |res, fn| res << fn.sub(pat, rep) }
end

#sub!(pat, rep) ⇒ Object

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



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# File 'lib/rake/file_list.rb', line 248

def sub!(pat, rep)
  each_with_index { |fn, i| self[i] = fn.sub(pat, rep) }
  self
end

#to_a ⇒ Object

Return the internal array object.



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# File 'lib/rake/file_list.rb', line 172

def to_a
  resolve
  @items
end

#to_ary ⇒ Object

Return the internal array object.



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# File 'lib/rake/file_list.rb', line 178

def to_ary
  to_a
end

#to_s ⇒ Object

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



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# File 'lib/rake/file_list.rb', line 334

def to_s
  resolve
  self.join(' ')
end