Returns true if newer is newer than all old_list.
Non-existent files are older than any file.
FileUtils.uptodate?('hello.o',%w(hello.c hello.h))or# system 'make hello.o'
# File lib/fileutils.rb, line 141
def uptodate?(new, old_list, options = nil)
raise ArgumentError, 'uptodate? does not accept any option' if options
return false unless File.exist?(new)
new_time = File.mtime(new)
old_list.each do |old|
if File.exist?(old)
return false unless new_time > File.mtime(old)
end
end
true
end