Class: Spring::Client::Run

Inherits:
Command
  • Object
show all
Defined in:
lib/spring/client/run.rb

Constant Summary collapse

SERVER_COMMAND = 
[
  File.join(*RbConfig::CONFIG.values_at('bindir', 'RUBY_INSTALL_NAME')),
  "-I", File.expand_path("../../..", __FILE__),
  "-r", "spring/server",
  "-r", "bundler/setup",
  "-e", "Spring::Server.boot"
]
FORWARDED_SIGNALS = 
%w(INT QUIT USR1 USR2 INFO)

Instance Attribute Summary

Attributes inherited from Command

#args, #env

Instance Method Summary collapse

Methods inherited from Command

call, #initialize

Constructor Details

This class inherits a constructor from Spring::Client::Command

Instance Method Details

#boot_server ⇒ Object 



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# File 'lib/spring/client/run.rb', line 63

def boot_server
  env.socket_path.unlink if env.socket_path.exist?
  Process.spawn(*SERVER_COMMAND)
  sleep 0.1 until env.socket_path.exist?
end

#call ⇒ Object 



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# File 'lib/spring/client/run.rb', line 19

def call
  Spring.verify_environment!
  boot_server unless env.server_running?

  application, client = UNIXSocket.pair

  server = UNIXSocket.open(env.socket_name)

  verify_server_version(server)
  server.send_io client
  server.puts rails_env_for(args.first)

  application.send_io STDOUT
  application.send_io STDERR
  application.send_io STDIN

  application.puts args.length

  args.each do |arg|
    application.puts  arg.length
    application.write arg
  end

  pid = server.gets
  pid = pid.chomp if pid

  # We must not close the client socket until we are sure that the application has
  # received the FD. Otherwise the FD can end up getting closed while it's in the server
  # socket buffer on OS X. This doesn't happen on Linux.
  client.close

  if pid && !pid.empty?
    forward_signals(pid.to_i)
    exit application.read.to_i
  else
    exit 1
  end
rescue Errno::ECONNRESET
  exit 1
ensure
  application.close if application
  server.close if server
end

#forward_signals(pid) ⇒ Object 



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# File 'lib/spring/client/run.rb', line 92

def forward_signals(pid)
  (FORWARDED_SIGNALS & Signal.list.keys).each do |sig|
    trap(sig) { Process.kill(sig, -Process.getpgid(pid)) }
  end
end

#rails_env_for(command_name) ⇒ Object 



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# File 'lib/spring/client/run.rb', line 82

def rails_env_for(command_name)
  command = Spring.command(command_name)

  if command.respond_to?(:env)
    command.env
  else
    ENV['RAILS_ENV'] || ENV['RACK_ENV'] || 'development'
  end
end

#verify_server_version(server) ⇒ Object 



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# File 'lib/spring/client/run.rb', line 69

def verify_server_version(server)
  server_version = server.gets.chomp
  if server_version != env.version
    STDERR.puts <<-ERROR
There is a version mismatch beween the spring client and the server.
You should restart the server and make sure to use the same version.

CLIENT: #{env.version}, SERVER: #{server_version}
ERROR
    exit 1
  end
end