Error message for improperly packaged boxes [GH-198]

CHANGELOG.md

@@ -8,6 +8,7 @@
     power off the system. [GH-575]
   - Tweaks to SSH to hopefully be more reliable in coming up.
   - Helpful error message when SCP is unavailable in the guest. [GH-568]
+  - Error message for improperly packaged box files. [GH-198]
 
 ## 0.8.10 (December 10, 2011)
 

lib/vagrant/action/box/unpackage.rb

@@ -48,7 +48,11 @@ module Vagrant
         def decompress
           Dir.chdir(@env["box_directory"]) do
             @env[:ui].info I18n.t("vagrant.actions.box.unpackage.extracting")
+            begin
               Archive::Tar::Minitar.unpack(@env["download.temp_path"], @env["box_directory"].to_s)
+            rescue SystemCallError
+              raise Errors::BoxUnpackageFailure
+            end
           end
         end
       end

lib/vagrant/errors.rb

@@ -118,6 +118,11 @@ module Vagrant
       error_key(:does_not_exist, "vagrant.actions.vm.check_box")
     end
 
+    class BoxUnpackageFailure < VagrantError
+      status_code(57)
+      error_key(:untar_failure, "vagrant.actions.box.unpackage")
+    end
+
     class BoxVerificationFailed < VagrantError
       status_code(15)
       error_key(:failed, "vagrant.actions.box.verify")

templates/locales/en.yml

@@ -432,6 +432,10 @@ en:
             A box already exists under the name of '%{name}'. This may or may
             not be the same box you are trying to add. Please use another name
             or remove the previous box then try to add it again.
+          untar_failure: |-
+            Failed to untar the box file. This is usually because you're
+            attempting to add a box that isn't a valid box file. Please
+            double check that the box file is properly packaged.
         verify:
           verifying: "Verifying box..."
           failed: |-