What is Invoker?
Invoker is a utility belt for managing processes in development environment. Use it for managing multiple processes with ease.
How to use it?
First we need to install invoker gem to get command line utility called invoker, we can do that via:
~> gem install invoker
Currently it only works with Ruby >= 1.9.3.
You need to start by creating a
ini file which will define processes you want to manage using invoker. An example
ini file is included in the repo.
[rails] directory = /home/gnufied/god_particle command = bundle exec rails s -p 5000 [dj] directory = /home/gnufied/god_particle command = bundle exec ruby script/delayed_job [events] directory = /home/gnufied/god_particle command = bundle exec ruby script/event_server
After that you can start process manager via:
~> invoker start invoker.ini
Above command will start all your processes in one terminal with their stdout/stderr merged and labelled. You
can also start
Invoker by daeomonizing it, via:
~> invoker start invoker.ini -d
.dev TLD support for OSX and Linux.
You can access http services managed by invoker via
command_label.dev domain locally.
To make it work though, you need to run following command, just once from anywhere:
~> sudo invoker setup # read below if you are migrating from Pow
This feature has been well tested to work on both
If you decide to remove Invoker, you can remove things installed by Invoker using command
~> sudo invoker uninstall
Now because invoker is making your app server available on a domain. It requires
control over port(or needs to know the port) on which your applications will be listening. This can be simply done by replacing specific port number in
ini file with
$PORT or by specifying
a port key. For example:
[terminal] directory = /home/gnufied/ayr-terminal port = 3000 command = node app [cms] directory = /home/gnufied/mezzainine command = python manage.py runserver $PORT --noreload [typo] directory = /home/gnufied/typo command = bundle exec rails s -p $PORT
Now these services can be accessed via
http://typo.dev. You can also access them via wildcard subdomains such as
You can also access any external http process via
.dev DNS by running
~> invoker add_http wordpress 8080
Above command will make wordpress available on
wordpress.dev even if
wordpress was original not started by Invoker. You can access any randomly
started process via Invoker like this.
Invoker uses a self-signed certificate to make all your web applications available via
https as well. You absolutely don't have to do anything. Access your webapps on
Invoker is 100% compatbile with
Procfile format used by Heroku. If you
have been using a
Procfile to bootstrap your development stack, you can
keep using it with
The only thing to remember is, your
$PORT in command - for
.dev domain feature to work
rails: cd $HOME/rails_app && bundle exec rails s -p $PORT cms: cd $HOME/cms && python manage.py runserver $PORT
Additionally Invoker allows you to manage individual processes. You can start/stop/restart
different processes managed by invoker without affecting others. Following commands work
for processes started by
Procfile as well.
# Will try to stop running delayed job by sending SIGINT to the process ~> invoker remove dj # If Process can't be killed by SIGINT send a custom signal ~> invoker remove dj -s 9 # add and start running ~> invoker add dj # List currently running processes managed by invoker ~> invoker list # Restart process given by command Label ~> invoker reload dj # Restart process given by command label using specific signal for killing ~> invoker reload dj -s 9 # tail logs of specified process. This is specially useful if you started # invoker daemonized or you want to watch logs of just one process discarding # others. ~> invoker tail dj
You can also enable OSX notifications for crashed processes by installing terminal-notifier gem. It is not a dependency, but can be useful if something crashed and you weren't paying attention.
Migrating from Pow
If you are migrating from Pow then first step before running
invoker setup is to uninstall Pow:
curl get.pow.cx/uninstall.sh | sh
After that you should run
as usual. If for some reason you can't uninstall Pow via above
command (in case you installed Pow using homebrew), then you
should remove Pow daemon manually.
invoker setup you will
have to switch off wi-fi and then switch it on for
resettng OSX network configuration.