rush is a replacement for the unix shell (bash, zsh, etc) which uses pure Ruby syntax. Grep through files, find and kill processes, copy files - everything you do in the shell, now in Ruby. Previously if you wanted to count the number of classes in your project, you might use a bash command like:
find myproj -name \*.rb | xargs grep '^\s*class' | wc -l
In rush, this is:
myproj['**/*.rb'].search(/^\s*class/).lines.size
How about killing those pesky stray mongrels? Before:
kill `ps aux | grep mongrel_rails | grep -v grep | cut -c 10-20`
After:
processes.filter(:cmdline => /mongrel_rails/).kill
But rush is more than just an interactive shell and a library: it can also control any number of remote machines from a single location. Copy files or directories between servers as seamlessly as if it was all local. bash and ssh, we love you, but your era is past.
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? Well, if you insist:
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"] }