vagrant box remove doesn't need provider if box only has one [GH-1032]

CHANGELOG.md

@@ -8,6 +8,8 @@ FEATURES:
 
 IMPROVEMENTS:
 
+  - `vagrant box remove` works with only the name of the box if that
+    box exists only backed by one provider. [GH-1032]
   - `vagrant destroy` returns exit status 1 if any of the confirmations
     are declined. [GH-923]
 

plugins/commands/box/command/remove.rb

@@ -12,7 +12,27 @@ module VagrantPlugins
           # Parse the options
           argv = parse_options(opts)
           return if !argv
-          raise Vagrant::Errors::CLIInvalidUsage, :help => opts.help.chomp if argv.length < 2
+          raise Vagrant::Errors::CLIInvalidUsage, :help => opts.help.chomp if argv.length < 1
+
+          if !argv[1]
+            # Try to automatically determine the provider.
+            providers = []
+            @env.boxes.all.each do |name, provider|
+              if name == argv[0]
+                providers << provider
+              end
+            end
+
+            if providers.length > 1
+              @env.ui.error(
+                I18n.t("vagrant.commands.box.remove_must_specify_provider",
+                       name: args[0],
+                       providers: providers.join(", ")))
+              return 1
+            end
+
+            argv[1] = providers[0] || ""
+          end
 
           b = nil
           begin

templates/locales/en.yml

@@ -656,6 +656,17 @@ en:
         vm_not_created: "VM not created. Moving on..."
         vm_not_running: "VM is not currently running. Please bring it up to run this command."
       box:
+        remove_must_specify_provider: |-
+          Multiple providers were found for the box '%{name}'. Please specify
+          the specific provider for the box you want to remove. The list of
+          providers backing this box is:
+
+          '%{providers}'
+
+          To remove the box for a specific provider, run the following command,
+          filling in PROVIDER with one of the providers above:
+
+          vagrant box remove '%{name}' PROVIDER
         no_installed_boxes: "There are no installed boxes! Use `vagrant box add` to add some."
         removing: |-
           Removing box '%{name}' with provider '%{provider}'...