env

#!/usr/bin/env ruby
require 'optparse'
options = {}

opts = OptionParser.new
opts.banner = "Usage: env [options] command"

opts.on("-e", "--environment ENVIRONMENT", "chimera environment to run in") do |env|
  options[:env] = env
end

opts.on("-h", "--help", "display this help") do
  puts opts
  exit
end

opts.on("-r", "--chroot", "use chroot jail to launch scripts") do |chroot|
  options[:chroot] = true
end
opts.parse!

cwd = Dir.pwd
if (options[:env])
  environment = options[:env]
elsif (not options[:env] and cwd =~ /chimera\/_env?\/([^\/]+)\//) 
  environment = $1
else
  puts "UNKNOWN ENVIRONMENT"
end
cmd = ARGV[0]
if not cmd
  puts opts
  puts "NO COMMAND GIVEN TO RUN" 
exit
end

pass_on = []
ENV["ENV_NAME"] = environment
ENV["ENV_ROOT"] = "/chimera/env/#{environment}"

index = 1
while index < ARGV.length do
  pass_on.push(ARGV[index])
  index = index + 1
end

c_pre = "/chimera/env/#{environment}"

chroot = options[:chroot]
if not chroot
  ENV["PATH"] = "#{c_pre}/usr/local/sbin:#{c_pre}/usr/local/bin:#{c_pre}/usr/sbin:#{c_pre}/usr/bin:#{c_pre}/sbin:#{c_pre}/bin:" + ENV["PATH"]
  ENV["LD_LIBRARY_PATH"] = "#{c_pre}/usr/lib:#{c_pre}/lib"
#  ENV["LD_PRELOAD"] = "#{c_pre}/usr/lib:#{c_pre}/lib"
  Kernel.exec("#{cmd}", *pass_on)
else
  
  ENV["PATH"] = "#/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:" + ENV["PATH"]
  
  ENV["LD_LIBRARY_PATH"] = "/usr/lib:/lib"
  Dir.chroot("#{c_pre}")
  #Dir.chdir("/usr/sbin")
  #puts Dir.entries(".").join("\n")
  Kernel.system("#{cmd}", *pass_on)
end