"ssh-config --host [x]" returns incorrect output

[saintaardvark]

Not sure if this is a bug or poor understanding of ssh-config intent, so please close if necessary.

"vagrant ssh-config" takes a --host argument, which I assume is meant to return the SSH configuration for just that host. (This is also assumed by ServerSpec, which parses the output of "vagrant ssh-config --host [x]" to get SSH details for multi-host vagrant instances.) However, instead of returning the SSH config for just host [x], it returns the SSH config for all hosts, each with a "Host [x]" directive. I've confirmed this with version 1.6.5 of Vagrant.

Example: I have a Vagrantfile that looks like this:

Vagrant.configure("2") do |config|
  config.vm.define "coney" do |coney|
    coney.vm.box = "precise32"
    coney.vm.hostname = "coney.rabbit"
    coney.vm.box_url = "http://files.vagrantup.com/precise32.box"
    coney.vm.network "private_network", ip: "192.168.50.10"
  end
  config.vm.define "rabbit" do |rabbit|
    rabbit.vm.box = "precise32"
    rabbit.vm.hostname = "rabbit.rabbit"
    rabbit.vm.box_url = "http://files.vagrantup.com/precise32.box"
    rabbit.vm.network "private_network", ip: "192.168.50.11"
    end
  end
end

Here's what vagrant ssh-config returns:

$ vagrant ssh-config
Host coney
  HostName 127.0.0.1
  User vagrant
  Port 2222
  UserKnownHostsFile /dev/null
  StrictHostKeyChecking no
  PasswordAuthentication no
  IdentityFile /Users/hugh/.vagrant.d/insecure_private_key
  IdentitiesOnly yes
  LogLevel FATAL

Host rabbit
  HostName 127.0.0.1
  User vagrant
  Port 2200
  UserKnownHostsFile /dev/null
  StrictHostKeyChecking no
  PasswordAuthentication no
  IdentityFile /Users/hugh/.vagrant.d/insecure_private_key
  IdentitiesOnly yes
  LogLevel FATAL

Given that, I'd expect the output of vagrant ssh-config --host coney to return just that machine's config. Instead, I see this:

$ vagrant ssh-config --host coney
Host coney
  HostName 127.0.0.1
  User vagrant
  Port 2222
  UserKnownHostsFile /dev/null
  StrictHostKeyChecking no
  PasswordAuthentication no
  IdentityFile /Users/hugh/.vagrant.d/insecure_private_key
  IdentitiesOnly yes
  LogLevel FATAL

Host coney
  HostName 127.0.0.1
  User vagrant
  Port 2200
  UserKnownHostsFile /dev/null
  StrictHostKeyChecking no
  PasswordAuthentication no
  IdentityFile /Users/hugh/.vagrant.d/insecure_private_key
  IdentitiesOnly yes
  LogLevel FATAL

That seems incorrect to me; I would argue that either "--host" should print one-and-only-one config, or the "--host" argument should be dropped entirely (and folks can parse the output on their own if they only need one host).

Thanks, and please let me know if you need any further information.

[mitchellh]

You can do vagrant ssh-config coney. :)