`vagrant ssh-config` outputs .ssh/config ready entry for current environment

bin/vagrant-ssh-config

@@ -0,0 +1,28 @@
+#!/usr/bin/env ruby
+begin
+  require File.expand_path('../../.bundle/environment', __FILE__)
+rescue LoadError
+  # Fallback on rubygems
+  require "rubygems"
+end
+
+require 'git-style-binary/command'
+
+# Get library
+libdir = File.join(File.dirname(__FILE__), '..', 'lib')
+require File.expand_path('vagrant', libdir)
+
+GitStyleBinary.command do
+  short_desc "outputs .ssh/config valid syntax for connecting to this environment via ssh"
+  banner <<-EOS
+Usage: #{command.full_name} #{all_options_string}
+
+Outputs a .ssh/config valid entry for connecting (via SCP, git, etc.)
+to the current environment.
+
+EOS
+
+  run do |command|
+    Vagrant::Commands.execute(:ssh_config)
+  end
+end

lib/vagrant/commands.rb

@@ -61,6 +61,18 @@ module Vagrant
       env.ssh.connect
     end
 
+    # Outputs a valid entry for .ssh/config which can be used to connect
+    # to this environment.
+    def ssh_config
+      env.require_persisted_vm
+      puts TemplateRenderer.render("ssh_config", {
+        :host_key => "vagrant",
+        :ssh_user => env.config.ssh.username,
+        :ssh_port => env.ssh.port,
+        :private_key_path => env.config.ssh.private_key_path
+      })
+    end
+
     # Halts a running vagrant instance. This forcibly halts the instance;
     # it is the equivalent of pulling the power on a machine. The instance
     # can be restarted again with {up}.

templates/ssh_config.erb

@@ -0,0 +1,7 @@
+Host <%= host_key %>
+  HostName localhost
+  User <%= ssh_user %>
+  Port <%= ssh_port %>
+  UserKnownHostsFile /dev/null
+  StrictHostKeyChecking no
+  IdentityFile <%= private_key_path %>

test/vagrant/commands_test.rb

@@ -108,6 +108,27 @@ class CommandsTest < Test::Unit::TestCase
       end
     end
 
+    context "ssh-config" do
+      setup do
+        @ssh = mock("ssh")
+        @ssh.stubs(:port).returns(2197)
+        @env.stubs(:ssh).returns(@ssh)
+      end
+
+      should "output rendered template" do
+        result = mock("result")
+        Vagrant::Util::TemplateRenderer.expects(:render).with("ssh_config", {
+          :host_key => "vagrant",
+          :ssh_user => @env.config.ssh.username,
+          :ssh_port => @env.ssh.port,
+          :private_key_path => @env.config.ssh.private_key_path
+        }).returns(result)
+
+        @commands.expects(:puts).with(result).once
+        @commands.ssh_config
+      end
+    end
+
     context "suspend" do
       setup do
         @persisted_vm.stubs(:suspend)