Daemonize

[AlexWayfer]

Hello!

How can I run filewatcher in background?

My case:

#!/usr/bin/env ruby

def bash(command)
  system "bash -c \"#{command}\""
end

bash "filewatcher 'some_files' 'some_command' &"
bash "tail -f some_log_file"

When I press Ctrl+C in tail — filewatcher is also stopping.

I want to stop tail, but not filewatcher.

Thanks!

[thomasfl]

The --restart option makes filewatcher run the command supplied as a parameter in the background:

    $ filewatcher --restart  "**/*.html" "webserver"

Every time an html file changes, filewatcher will kill the webserver process and start it again in a new process.

So if you want to run filewatcher in the background, you can actually supply filewatcher as a command to filewatcher itself. I haven't tested this, but it may look something like this:

    $ filewatcher --restart  "**/*.html" "$ filewatcher --restart  '**/*.html' 'tail -f some_log_file'"

If you wan't to get some hints on how to run things in the background, please have a look at

https://github.com/thomasfl/filewatcher/blob/master/bin/filewatcher

Processes are run in the background simply by using

  pid = Process.spawn(env, cmd)

I have to admit I am not sure what you are trying to accomplish.

[AlexWayfer]

Okay, that's example for my case:

#!/usr/bin/env ruby

def bash(command)
    system "bash -c \"#{command}\""
end

def server(command)
    pumactl = "pumactl #{command} -F config/puma.rb"
    bash pumactl
    return unless %i(start restart).include?(command) && environment == 'development'
    bash 'pkill -f filewatcher'
    bash "filewatcher '**/*.{rb,ru,yml}' '#{pumactl}' > /dev/null &"
end

def monitor_server
    bash "tail -f log/{stdout,stderr} -q"
end

## Runtime
case ARGV[0]
when 'start'
    server :start
when 'stop'
    server :stop
when 'restart'
    server :restart
when 'monitor'
    monitor_server
when 'devel'
    server :restart
    puts 'Waiting for logs...'
    sleep 2
    monitor_server
end

[AlexWayfer]

Processes without daemonizing binds to Ruby script, as I think (also with &, or Process.spawn). So… When I press Ctrl+C — it's stop all binded processes too. But… I want to stop tail, not filewatcher. It's must be self-daemonizing, as I think (as puma) for that. But how? Or is there some workarounds?

[AlexWayfer]

Maybe that can be some helpful for your gem?