commands/up: automatically install providers

lib/vagrant/environment.rb

@@ -309,6 +309,7 @@ module Vagrant
     def default_provider(**opts)
       opts[:exclude]       = Set.new(opts[:exclude]) if opts[:exclude]
       opts[:force_default] = true if !opts.key?(:force_default)
+      opts[:check_usable] = true if !opts.key?(:check_usable)
 
       default = ENV["VAGRANT_DEFAULT_PROVIDER"]
       default = nil if default == ""
@@ -376,6 +377,7 @@ module Vagrant
 
       # Find the matching implementation
       ordered.each do |_, key, impl, _|
+        return key if !opts[:check_usable]
         return key if impl.usable?(false)
       end
 

plugins/commands/up/command.rb

@@ -1,4 +1,5 @@
 require 'optparse'
+require 'set'
 
 require "vagrant"
 
@@ -16,6 +17,7 @@ module VagrantPlugins
       def execute
         options = {}
         options[:destroy_on_error] = true
+        options[:install_provider] = true
         options[:parallel] = true
         options[:provision_ignore_sentinel] = false
 
@@ -41,6 +43,11 @@ module VagrantPlugins
                "Back the machine with a specific provider") do |provider|
             options[:provider] = provider
           end
+
+          o.on("--[no-]install-provider",
+               "If possible, install the provider if it isn't installed") do |p|
+            options[:install_provider] = p
+          end
         end
 
         # Parse the options
@@ -53,9 +60,7 @@ module VagrantPlugins
         # Go over each VM and bring it up
         @logger.debug("'Up' each target VM...")
 
-        # Build up the batch job of what we'll do
-        machines = []
-        @env.batch(options[:parallel]) do |batch|
+        # Get the names of the machines we want to bring up
         names = argv
         if names.empty?
           autostart = false
@@ -70,7 +75,17 @@ module VagrantPlugins
           names = nil if autostart && names.empty?
         end
 
+        # Build up the batch job of what we'll do
+        machines = []
         if names
+          # If we're installing providers, then do that. We don't
+          # parallelize this step because it is likely the same provider
+          # anyways.
+          if options[:install_provider]
+            install_providers(names)
+          end
+
+          @env.batch(options[:parallel]) do |batch|
             with_target_vms(names, provider: options[:provider]) do |machine|
               @env.ui.info(I18n.t(
                 "vagrant.commands.up.upping",
@@ -106,6 +121,44 @@ module VagrantPlugins
         # Success, exit status 0
         0
       end
+
+      protected
+
+      def install_providers(names)
+        # First create a set of all the providers we need to check for.
+        # Most likely this will be a set of one.
+        providers = Set.new
+        names.each do |name|
+          providers.add(@env.default_provider(machine: name.to_sym, check_usable: false))
+        end
+
+        # Go through and determine if we can install the providers
+        providers.delete_if do |name|
+          !@env.can_install_provider?(name)
+        end
+
+        # Install the providers if we have to
+        providers.each do |name|
+          # Find the provider. Ignore if we can't find it, this error
+          # will pop up later in the process.
+          parts = Vagrant.plugin("2").manager.providers[name]
+          next if !parts
+
+          # If the provider is already installed, then our work here is done
+          cls = parts[0]
+          next if cls.installed?
+
+          # Some human-friendly output
+          ui = Vagrant::UI::Prefixed.new(@env.ui, "")
+          ui.output(I18n.t(
+            "vagrant.installing_provider",
+            provider: name.to_s))
+          ui.detail(I18n.t("vagrant.installing_provider_detail"))
+
+          # Install the provider
+          @env.install_provider(name)
+        end
+      end
     end
   end
 end

plugins/providers/virtualbox/provider.rb

@@ -5,6 +5,15 @@ module VagrantPlugins
     class Provider < Vagrant.plugin("2", :provider)
       attr_reader :driver
 
+      def self.installed?
+        Driver::Meta.new
+        true
+      rescue Vagrant::Errors::VirtualBoxInvalidVersion
+        return false
+      rescue Vagrant::Errors::VirtualBoxNotDetected
+        return false
+      end
+
       def self.usable?(raise_error=false)
         # Instantiate the driver, which will determine the VirtualBox
         # version and all that, which checks for VirtualBox being present

templates/locales/en.yml

@@ -154,6 +154,13 @@ en:
       Inserting generated public key within guest...
     inserting_remove_key: |-
       Removing insecure key from the guest if it's present...
+    installing_provider: |-
+      Provider '%{provider}' not found. We'll automatically install it now...
+    installing_provider_detail: |-
+      The installation process will start below. Human interaction may be
+      required at some points. If you're uncomfortable with automatically
+      installing this provider, you can safely Ctrl-C this process and install
+      it manually.
     list_commands: |-
       Below is a listing of all available Vagrant commands and a brief
       description of what they do.