Minimal Rails 3 support for RubyMine: Creates the old Rails 2 scripts that simply executes Rails 3 'rails' command.

rubymine.rb

#!/usr/bin/env ruby
#
# Helper script to temporary fix some RubyMine 2.0.2 functionality by
# creating old-style Rails 2 scripts. This enables me actually to
# run & debug apps and use the Rails console.
#
# On my machine I have to increase the debugger timeout to connect to a
# Rails 3 app on Ruby 1.9.1. This is done for OS X by modify the Info.plist
# to increase the timeout.
#
# The defaults are '/Applications/RubyMine 2.0.2.app/Contents/Info.plist'
# for the plist and 30 for the timeout. You can pass these settings to
# the script as parameters:
#
# ./rubymine.rb /Users/John/Applications/RubyMine 2.0.2.app/Contents/Info.plist 45
#
# To use the feature you have to install the 'plist' gem:
#
# gem install plist
#
# Optinally you may want also to tweak the memory and parallel garbage collector threads
# to increase the RubyMine performance.
#

require 'FileUtils'

# Create Rails 2 style scripts
[ 'script/console',
  'script/dbconsole',
  'script/destroy',
  'script/generate',
  'script/performance/benchmarker',
  'script/performance/profiler',
  'script/plugin',
  'script/runner',
  'script/server'
].each do |script|
  FileUtils.mkdir_p 'script/performance'
  File.open(script, 'w') do |file| 
    file.write <<SCRIPT
#!/usr/bin/env ruby
exec 'script/rails #{ script.split('/').last }'
SCRIPT
    file.chmod(0755)
  end
end

# RubyMine configuration tuning
if File.exist?('/Applications/RubyMine 2.0.2.app/Contents/Info.plist')
  begin
    require 'plist'
    
    config = ARGV[0] || '/Applications/RubyMine 2.0.2.app/Contents/Info.plist'
    info = Plist::parse_xml(config)
    #info['Java']['VMOptions'] = '-Xms256m -Xmx1024m -XX:MaxPermSize=256m -XX:+UseParallelGC -XX:ParallelGCThreads=4 -XX:+UseAdaptiveSizePolicy -Xbootclasspath/a:../lib/boot.jar -ea'
    info['Java']['Properties']['ruby.debug.timeout'] = ARGV[1] || '30'
    File.open(config, 'w') {|f| f.write(info.to_plist) }
    
  rescue LoadError
    puts 'Install the \'plist\' gem to increase debugger timeout automatically.'
  end
end

Forget this gist! EAP with Rails 3 support is available: http://confluence.jetbrains.net/display/RUBYDEV/RubyMine+EAP