Invalid Guardfile - how should I debug?

[jonallured]

I'm new to Guard and I'm having a hard time getting this gem working. I was able to get other guards working, but not this one. When I try to use it, I get this error:

ERROR: Invalid Guardfile, original error is:
undefined method `keys' for nil:NilClass

Here's what's in my Guardfile:

opts = {
:hostname => "somehost",
:user => "someuser",
:remote => "somepath",
:debug => true,
:growl => true
}

group 'flopbox' do
guard 'flopbox', opts do
watch(/.*/)
end
end

Basically the default from the README. I just don't know how to debug this error message, seems like it could be anything...

Thanks!
Jon

[sgtpep]

The same for me. Trying to investigate (but sadly I don't know Ruby well).

[vincentchu]

Can you guys provide a backtrace? Cheers.

[jonallured]

Hi Vincent,

There's no backtrace, here's my complete terminal output:

$ guard
ERROR: Invalid Guardfile, original error is:
undefined method `keys' for nil:NilClass

But then it occurred to me that since the Guardfile is just Ruby, I could wrap the blocks in a before/rescue and then get a backtrace that way, so I altered the Guardfile like this:

begin
  group 'flopbox' do
    guard 'flopbox', opts do
      watch(/.*/)
    end
  end
rescue Exception => e
  puts e.inspect
  puts e.backtrace
end

And then this is the terminal output I get:

$ guard
#<NoMethodError: undefined method `keys' for nil:NilClass>
/Users/jon/.rvm/gems/ruby-1.9.2-p180/gems/net-ssh-2.2.1/lib/net/ssh.rb:160:in `start'
/Users/jon/.rvm/gems/ruby-1.9.2-p180/gems/net-sftp-2.0.5/lib/net/sftp.rb:31:in `start'
/Users/jon/.rvm/gems/ruby-1.9.2-p180/gems/guard-flopbox-1.4/lib/guard/flopbox.rb:12:in `initialize'
/Users/jon/.rvm/gems/ruby-1.9.2-p180/gems/guard-0.6.3/lib/guard.rb:89:in `new'
/Users/jon/.rvm/gems/ruby-1.9.2-p180/gems/guard-0.6.3/lib/guard.rb:89:in `add_guard'
/Users/jon/.rvm/gems/ruby-1.9.2-p180/gems/guard-0.6.3/lib/guard/dsl.rb:130:in `guard'
/Users/jon/Desktop/guard_test/Guardfile:16:in `block in instance_eval_guardfile'
/Users/jon/.rvm/gems/ruby-1.9.2-p180/gems/guard-0.6.3/lib/guard/dsl.rb:121:in `call'
/Users/jon/.rvm/gems/ruby-1.9.2-p180/gems/guard-0.6.3/lib/guard/dsl.rb:121:in `group'
/Users/jon/Desktop/guard_test/Guardfile:15:in `instance_eval_guardfile'
/Users/jon/.rvm/gems/ruby-1.9.2-p180/gems/guard-0.6.3/lib/guard/dsl.rb:27:in `instance_eval'
/Users/jon/.rvm/gems/ruby-1.9.2-p180/gems/guard-0.6.3/lib/guard/dsl.rb:27:in `instance_eval_guardfile'
/Users/jon/.rvm/gems/ruby-1.9.2-p180/gems/guard-0.6.3/lib/guard/dsl.rb:11:in `evaluate_guardfile'
/Users/jon/.rvm/gems/ruby-1.9.2-p180/gems/guard-0.6.3/lib/guard.rb:34:in `start'
/Users/jon/.rvm/gems/ruby-1.9.2-p180/gems/guard-0.6.3/lib/guard/cli.rb:17:in `start'
/Users/jon/.rvm/gems/ruby-1.9.2-p180/gems/thor-0.14.6/lib/thor/task.rb:22:in `run'
/Users/jon/.rvm/gems/ruby-1.9.2-p180/gems/thor-0.14.6/lib/thor/invocation.rb:118:in `invoke_task'
/Users/jon/.rvm/gems/ruby-1.9.2-p180/gems/thor-0.14.6/lib/thor.rb:263:in `dispatch'
/Users/jon/.rvm/gems/ruby-1.9.2-p180/gems/thor-0.14.6/lib/thor/base.rb:389:in `start'
/Users/jon/.rvm/gems/ruby-1.9.2-p180/gems/guard-0.6.3/bin/guard:6:in `<top (required)>'
/Users/jon/.rvm/gems/ruby-1.9.2-p180/bin/guard:19:in `load'
/Users/jon/.rvm/gems/ruby-1.9.2-p180/bin/guard:19:in `<main>'

Does that help?

Thanks!
Jon

[vincentchu]

jonallurd --

Your options need to include a key called :sftp_options which should be a additional options hash to the box you're trying to SFTP to. If you don't want to pass any additional options, just leave it blank. For example:

opts = {
  # other options
  :sftp_opts => {}
}