Bivek/invoker

An Utility to manage all your processes in development envionment

Invoker is a gem for managing processes in development environment.

Usage

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 and 2.0.

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 = zsh -c 'bundle exec rails s -p 5000'

[dj]
directory = /home/gnufied/god_particle
command = zsh -c 'bundle exec ruby script/delayed_job'

[events]
directory = /home/gnufied/god_particle
command = zsh -c '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.

Now additionally you can control individual process by,

# 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

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.

Using with rbenv or rvm

The way rbenv and rvm work sometimes creates problems when you are trying to use a process supervisor like invoker. There are couple of things to keep in mind, If you are running invoker with Ruby version x, but your application requires Ruby version Y:

• When using rbenv, you can define the command with environment variable RBENV_VERSION=Y and then start your application. In other words:

    command = RBENV_VERSION=2.0.0-p0 zsh -c "bundle exec rails s"
  

• Unless version of Ruby using which you are running invoker command and version of Ruby you are using in the application is same, you almost always will want to use zsh -c or bash -c. RVM in particular requires a login shell and hence sometimes you may have to use bash -lc. For example:

    command = bash -lc "rvm 2.0.0-p0 do bundle exec rails s"
  

Bug reports and Feature requests

Please use Github Issue Tracker for feature requests or bug reports.