kernel/v2: fix push strategy config lookup

plugins/kernel_v2/config/push.rb

@@ -21,18 +21,18 @@ module VagrantPlugins
 
         # Compile all the provider configurations
         @__defined_pushes.each do |name, tuples|
-          # Find the configuration class for this push
-          config_class = Vagrant.plugin("2").manager.push_configs[name]
-          config_class ||= Vagrant::Config::V2::DummyConfig
-
-          # Load it up
-          config = config_class.new
-
           # Capture the strategy so we can use it later. This will be used in
           # the block iteration for merging/overwriting
           strategy = name
           strategy = tuples[0][0] if tuples[0]
 
+          # Find the configuration class for this push
+          config_class = Vagrant.plugin("2").manager.push_configs[strategy]
+          config_class ||= Vagrant::Config::V2::DummyConfig
+
+          # Load it up
+          config = config_class.new
+
           begin
             tuples.each do |s, b|
               # Update the strategy if it has changed, reseting the current

plugins/pushes/local-exec/plugin.rb

@@ -8,13 +8,13 @@ module VagrantPlugins
       Run a local command or script to push
       DESC
 
-      config(:local_exec, :push) do
+      config(:"local-exec", :push) do
         require File.expand_path("../config", __FILE__)
         init!
         Config
       end
 
-      push(:local_exec) do
+      push(:"local-exec") do
         require File.expand_path("../push", __FILE__)
         init!
         Push

plugins/pushes/local-exec/push.rb

@@ -1,6 +1,6 @@
 require "fileutils"
 require "tempfile"
-require "vagrant/util/subprocess"
+require "vagrant/util/safe_exec"
 
 require_relative "errors"
 
@@ -38,16 +38,7 @@ module VagrantPlugins
 
       # Execute the script, raising an exception if it fails.
       def execute!(*cmd)
-        result = Vagrant::Util::Subprocess.execute(*cmd)
-
-        if result.exit_code != 0
-          raise Errors::CommandFailed,
-            cmd:    cmd.join(" "),
-            stdout: result.stdout,
-            stderr: result.stderr
-        end
-
-        result
+        Vagrant::Util::SafeExec.exec(cmd[0], *cmd[1..-1])
       end
     end
   end