rush – manage your unix systems with pure Ruby

rush is a unix integration library and an interactive shell which uses pure Ruby syntax. Walk directory trees; create, copy, search, and destroy files; find and kill processes - everything you’d normally do with shell commands, now in the strict and elegant world of Ruby.

Usage

Count the number of classes in your project using bash:

find myproj -name \*.rb | xargs grep '^\s*class' | wc -l

In rush, this is:

myproj['**/*.rb'].search(/^\s*class/).lines.size

Pesky stray mongrels? In bash:

kill `ps aux | grep mongrel_rails | grep -v grep | cut -c 10-20`

In rush:

processes.filter(:cmdline => /mongrel_rails/).kill

As a library

require 'rubygems'
require 'rush'

file = Rush['/tmp/myfile']
file.write "hello"
puts file.contents
file.destroy

puts Rush.my_process.pid
puts Rush.processes.size
puts Rush.bash("echo SHELL COMMAND | tr A-Z a-z")
puts Rush.launch_dir['*.rb'].search(/Rush/).entries.inspect

Invoking the shell

Run the “rush” binary to enter the interactive shell.

Remote access and clustering

rush can control any number of remote machines from a single location. Copy files or directories between servers as seamlessly as if it was all local.

Example of remote access:

local = Rush::Box.new('localhost')
remote = Rush::Box.new('my.remote.server.com')
local_dir = local['/Users/adam/myproj/']
remote_dir = remote['/home/myproj/app/']

local_dir.copy_to remote_dir
remote_dir['**/.svn/'].each { |d| d.destroy }

Clustering:

local_dir = Rush::Box.new('localhost')['/Users/adam/server_logs/'].create
servers = %w(www1 www2 www3).map { |n| Rush::Box.new(n) }
servers.each { |s| s['/var/log/nginx/access.log'].copy_to local_dir["#{s.host}_access.log"] }

Reference

For more details on syntax and commands, see: