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require 'rake/cloneable'
require 'rake/file_utils_ext'
require 'rake/pathmap'
######################################################################
module Rake
# #########################################################################
# 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.
#
class FileList
include Cloneable
# == Method Delegation
#
# The lazy evaluation magic of FileLists happens by implementing all the
# array specific methods to call +resolve+ before delegating the heavy
# lifting to an embedded array object (@items).
#
# In addition, there are two kinds of delegation calls. The regular kind
# delegates to the @items array and returns the result directly. Well,
# almost directly. It checks if the returned value is the @items object
# itself, and if so will return the FileList object instead.
#
# The second kind of delegation call is used in methods that normally
# return a new Array object. We want to capture the return value of these
# methods and wrap them in a new FileList object. We enumerate these
# methods in the +SPECIAL_RETURN+ list below.
# List of array methods (that are not in +Object+) that need to be
# delegated.
ARRAY_METHODS = (Array.instance_methods - Object.instance_methods).map { |n| n.to_s }
# List of additional methods that must be delegated.
MUST_DEFINE = %w[to_a inspect <=>]
# List of methods that should not be delegated here (we define special
# versions of them explicitly below).
MUST_NOT_DEFINE = %w[to_a to_ary partition *]
# List of delegated methods that return new array values which need
# wrapping.
SPECIAL_RETURN = %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).collect{ |s| s.to_s }.sort.uniq
# Now do the delegation.
DELEGATING_METHODS.each_with_index do |sym, i|
if SPECIAL_RETURN.include?(sym)
ln = __LINE__+1
class_eval %{
def #{sym}(*args, &block)
resolve
result = @items.send(:#{sym}, *args, &block)
FileList.new.import(result)
end
}, __FILE__, ln
else
ln = __LINE__+1
class_eval %{
def #{sym}(*args, &block)
resolve
result = @items.send(:#{sym}, *args, &block)
result.object_id == @items.object_id ? self : result
end
}, __FILE__, ln
end
end
# 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
#
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
# 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 )
#
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
alias :add :include
# 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']
#
def exclude(*patterns, &block)
patterns.each do |pat|
@exclude_patterns << pat
end
if block_given?
@exclude_procs << block
end
resolve_exclude if ! @pending
self
end
# Clear all the exclude patterns so that we exclude nothing.
def clear_exclude
@exclude_patterns = []
@exclude_procs = []
self
end
# Define equality.
def ==(array)
to_ary == array
end
# Return the internal array object.
def to_a
resolve
@items
end
# Return the internal array object.
def to_ary
to_a
end
# Lie about our class.
def is_a?(klass)
klass == Array || super(klass)
end
alias kind_of? is_a?
# Redefine * to return either a string or a new file list.
def *(other)
result = @items * other
case result
when Array
FileList.new.import(result)
else
result
end
end
# Resolve all the pending adds now.
def resolve
if @pending
@pending = false
@pending_add.each do |fn| resolve_add(fn) end
@pending_add = []
resolve_exclude
end
self
end
def resolve_add(fn)
case fn
when %r{[*?\[\{]}
add_matching(fn)
else
self << fn
end
end
private :resolve_add
def resolve_exclude
reject! { |fn| exclude?(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:ascii-8bit", *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
$stderr.puts "Error while processing '#{fn}': #{ex}"
end
end
matched
end
# Return a new file list that only contains file names from the current
# file list that exist on the file system.
def existing
select { |fn| File.exist?(fn) }
end
# Modify the current file list so that it contains only file name that
# exist on the file system.
def existing!
resolve
@items = @items.select { |fn| File.exist?(fn) }
self
end
# FileList version of partition. Needed because the nested arrays should
# be FileLists in this version.
def partition(&block) # :nodoc:
resolve
result = @items.partition(&block)
[
FileList.new.import(result[0]),
FileList.new.import(result[1]),
]
end
# Convert a FileList to a string by joining all elements with a space.
def to_s
resolve
self.join(' ')
end
# Add matching glob patterns.
def add_matching(pattern)
Dir[pattern].each do |fn|
self << fn unless exclude?(fn)
end
end
private :add_matching
# Should the given file name be excluded?
def exclude?(fn)
return true if @exclude_patterns.any? do |pat|
case pat
when Regexp
fn =~ pat
when /[*?]/
File.fnmatch?(pat, fn, File::FNM_PATHNAME)
else
fn == pat
end
end
@exclude_procs.any? { |p| p.call(fn) }
end
DEFAULT_IGNORE_PATTERNS = [
/(^|[\/\\])CVS([\/\\]|$)/,
/(^|[\/\\])\.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
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
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