Merge pull request hashicorp#1783 from Aigeruth/issue-654

Check for binaries as part of Subprocess

lib/vagrant/errors.rb

@@ -163,6 +163,14 @@ class CLIInvalidOptions < VagrantError
       error_key(:cli_invalid_options)
     end
 
+    class CommandUnavailable < VagrantError
+      error_key(:command_unavailable)
+    end
+
+    class CommandUnavailableWindows < VagrantError
+      error_key(:command_unavailable_windows)
+    end
+
     class ConfigInvalid < VagrantError
       error_key(:config_invalid)
     end

lib/vagrant/util/subprocess.rb

@@ -5,6 +5,7 @@
 
 require 'vagrant/util/platform'
 require 'vagrant/util/safe_chdir'
+require 'vagrant/util/which'
 
 module Vagrant
   module Util
@@ -26,6 +27,11 @@ def self.execute(*command, &block)
       def initialize(*command)
         @options = command.last.is_a?(Hash) ? command.pop : {}
         @command = command
+        @command[0] = Which.which(@command[0]) unless File.exists? @command[0]
+        unless @command[0]
+          raise Errors::CommandUnavailableWindows if Platform.windows?
+          raise Errors::CommandUnavailable
+        end
         @logger  = Log4r::Logger.new("vagrant::util::subprocess")
       end
 

templates/locales/en.yml

@@ -167,6 +167,8 @@ en:
         available below.
 
         %{help}
+      command_unavailable: "command binary could not be found. Is this application installed?"
+      command_unavailable_windows: "command executable not found in any directories in the %PATH% variable."
       config_invalid: |-
         There are errors in the configuration of this machine. Please fix
         the following errors and try again: