require 'optparse' if RUBY_PLATFORM =~ /mswin32/ then abort("Inspector is only for Unix") end OPTIONS = { :pid_path => File.expand_path(RAILS_ROOT + '/tmp/pids'), :pattern => "dispatch.*.pid", :ps => "ps -o pid,state,user,start,time,pcpu,vsz,majflt,command -p %s" } class Inspector def self.inspect(pid_path, pattern) new(pid_path, pattern).inspect end def initialize(pid_path, pattern) @pid_path, @pattern = pid_path, pattern end def inspect header = `#{OPTIONS[:ps] % 1}`.split("\n")[0] + "\n" lines = pids.collect { |pid| `#{OPTIONS[:ps] % pid}`.split("\n")[1] } puts(header + lines.join("\n")) end private def pids pid_files.collect do |pid_file| File.read(pid_file).to_i end end def pid_files Dir.glob(@pid_path + "/" + @pattern) end end ARGV.options do |opts| opts.banner = "Usage: inspector [options]" opts.separator "" opts.on <<-EOF Description: Displays system information about Rails dispatchers (or other processes that use pid files) through the ps command. Examples: inspector # default ps on all tmp/pids/dispatch.*.pid files inspector -s 'ps -o user,start,majflt,pcpu,vsz -p %s' # custom ps, %s is where the pid is interleaved EOF opts.on(" Options:") opts.on("-s", "--ps=command", "default: #{OPTIONS[:ps]}", String) { |v| OPTIONS[:ps] = v } opts.on("-p", "--pidpath=path", "default: #{OPTIONS[:pid_path]}", String) { |v| OPTIONS[:pid_path] = v } opts.on("-r", "--pattern=pattern", "default: #{OPTIONS[:pattern]}", String) { |v| OPTIONS[:pattern] = v } opts.separator "" opts.on("-h", "--help", "Show this help message.") { puts opts; exit } opts.parse! end Inspector.inspect(OPTIONS[:pid_path], OPTIONS[:pattern])