module Rake::AltSystem

# File lib/rake/alt_system.rb, line 36
def define_module_function(name, &block)
 define_method(name, &block)
 module_function(name)
end

# File lib/rake/alt_system.rb, line 97
def backticks(cmd)
 kernel_backticks(repair_command(cmd))
end

# File lib/rake/alt_system.rb, line 71
def find_runnable(file)
 if file =~ RUNNABLE_PATTERN
 file
 else
 RUNNABLE_EXTS.each { |ext|
 test = "#{file}.#{ext}"
 return test if File.exist?(test)
 }
 nil
 end
end

# File lib/rake/alt_system.rb, line 51
def repair_command(cmd)
 "call " + (
 if cmd =~ %r!\A\s*\".*?\"!
 # already quoted
 cmd
 elsif match = cmd.match(%r!\A\s*(\S+)!)
 if match[1] =~ %r!/!
 # avoid x/y.bat interpretation as x with option /y
 %Q!"#{match[1]}"! + match.post_match
 else
 # a shell command will fail if quoted
 cmd
 end
 else
 # empty or whitespace
 cmd
 end
 )
end

# File lib/rake/alt_system.rb, line 83
def system(cmd, *args)
 repaired = (
 if args.empty?
 [repair_command(cmd)]
 elsif runnable = find_runnable(cmd)
 [File.expand_path(runnable), *args]
 else
 # non-existent file
 [cmd, *args]
 end
 )
 kernel_system(*repaired)
end