Prysless

prysless aims to integrate ruby programs in terminal sessions with lowest harm.

It is based on pry REPL, hence the name.

Installation

Add this line to your application's Gemfile:

gem 'prysless'

And then execute:

$ bundle

Or install it yourself as:

$ gem install prysless

All the configuring is done via environment variables, so to me it adds up to editing my bashrc

For example:

export PRYSLESS_ALIASES='l=ls:c=cd'
export PRYSLESS_LIBRARY_PATH="$HOME/dev/ec2l/lib"
export PRYSLESS_REQUIRE="e=ec2l/Ec2l/Client.new:a=pry/[]"

PRYSLESS_REQUIRE tells prysless what objects to preload and how to name them.

So, for example:

e=ec2l/Ec2l/Client.new

Will load into the variable named e Ec2l::Client.new after requiring 'ec2l'.

Because I use the development version of ec2l and not the gem directly, I added my ec2l development library directory to PRYSLESS_LIBRARY_PATH.

Also, I like to add an alias to prysless_store command:

alias p=prysless_store

Just run

prysless

Once in pry shell, you'll be able to access the variables you defined:

[1] pry(<Prysless::Shell>)> e
=> <Ec2l::Client:0x000000022f5e70
...
[2] pry(<Prysless::Shell>)> cd e

[4] pry(<Ec2l::Client>):1> show-doc ins

Lets say you need to share data between your session and an external program:

[8] pry(#<Prysless::Shell>)> s.blah = 'test'
=> "test"

Now on your shell, provided 'p' is an alias to prysless_store:

$ echo I need to $(p blah) some more
I need to test some more