commands/plugin: vagrant plugin install can accept multiple

CHANGELOG.md

@@ -30,6 +30,8 @@ IMPROVEMENTS:
     plugins, respecting any constraints set.
   - commands/plugin: `vagrant plugin uninstall` can now uninstall multiple
     plugins.
+  - commands/plugin: `vagrant plugin install` can now install multiple
+    plugins.
 
 BUG FIXES:
 

plugins/commands/plugin/command/install.rb

@@ -13,7 +13,7 @@ module VagrantPlugins
           options = { verbose: false }
 
           opts = OptionParser.new do |o|
-            o.banner = "Usage: vagrant plugin install <name> [-h]"
+            o.banner = "Usage: vagrant plugin install <name>... [-h]"
             o.separator ""
             build_install_opts(o, options)
 
@@ -28,13 +28,15 @@ module VagrantPlugins
           raise Vagrant::Errors::CLIInvalidUsage, :help => opts.help.chomp if argv.length < 1
 
           # Install the gem
+          argv.each do |name|
             action(Action.action_install, {
               :plugin_entry_point => options[:entry_point],
               :plugin_version     => options[:plugin_version],
               :plugin_sources     => options[:plugin_sources],
-            :plugin_name        => argv[0],
+              :plugin_name        => name,
               :plugin_verbose     => options[:verbose]
             })
+          end
 
           # Success, exit status 0
           0

website/docs/source/v2/cli/plugin.html.md

@@ -20,7 +20,7 @@ of subcommands:
 
 # Plugin Install
 
-**Command: `vagrant plugin install <name>`**
+**Command: `vagrant plugin install <name>...`**
 
 This installs a plugin with the given name or file path. If the name
 is not a path to a file, then the plugin is installed from remote
@@ -28,6 +28,10 @@ repositories, usually [RubyGems](http://rubygems.org). This command will
 also update a plugin if it is already installed, but you can also use
 `vagrant plugin update` for that.
 
+If multiple names are specified, multiple plugins will be installed. If
+flags are given below, the flags will apply to _all_ plugins being installed
+by the current command invocation.
+
 This command accepts optional command-line flags:
 
 * `--entry-point ENTRYPOINT` - By default, installed plugins are loaded