Add .error! for powershell_exec

This matches powershell_out and it's something we need to easily migrate resources to the new helper.

Signed-off-by: Tim Smith <tsmith@chef.io>

2 files changed, 24 insertions, 1 deletions

diff --git a/lib/chef/mixin/powershell_exec.rb b/lib/chef/mixin/powershell_exec.rb
index 1a60a3d480..e3410e007f 100644
--- a/lib/chef/mixin/powershell_exec.rb
+++ b/lib/chef/mixin/powershell_exec.rb
@@ -20,7 +20,7 @@ require_relative "../powershell"
 # The powershell_exec mixin provides in-process access to PowerShell engine via
 # a COM interop (installed by the Chef Client installer).
 #
-# powershell_exec returns a Chef::PowerShell object that provides 3 methods:
+# powershell_exec returns a Chef::PowerShell object that provides 4 methods:
 #
 # .result - returns a hash representing the results returned by executing the
 #           PowerShell script block
@@ -28,6 +28,7 @@ require_relative "../powershell"
 #           PowerShell error stream during execution
 # .error? - returns true if there were error messages written to the PowerShell
 #           error stream during execution
+# .error! - raise Chef::PowerShell::CommandFailed if there was an error
 #
 # Some examples of usage:
 #
@@ -100,6 +101,14 @@ class Chef
       def powershell_exec(script)
         Chef::PowerShell.new(script)
       end
+
+      # The same as the #powershell_exec method except this will raise
+      # Chef::PowerShell::CommandFailed if the command fails
+      def powershell_exec!(script)
+        cmd = Chef::PowerShell.new(script)
+        cmd.error!
+        cmd
+      end
     end
   end
 end
diff --git a/lib/chef/powershell.rb b/lib/chef/powershell.rb
index b1f8c5396c..9790a3c10f 100644
--- a/lib/chef/powershell.rb
+++ b/lib/chef/powershell.rb
@@ -39,12 +39,26 @@ class Chef
       exec(script)
     end
 
+    #
+    # Was there an error running the command
+    #
+    # @return [Boolean]
+    #
     def error?
       return true if errors.count > 0
 
       false
     end
 
+    class CommandFailed < RuntimeError; end
+
+    #
+    # @raise [Chef::PowerShell::CommandFailed] raise if the command failed
+    #
+    def error!
+      raise Chef::PowerShell::CommandFailed, "Unexpected exit in PowerShell command: #{@errors}" if error?
+    end
+
     private
 
     def exec(script)