commands/version: check latest version

plugins/commands/version/command.rb

@@ -0,0 +1,60 @@
+require "json"
+require "optparse"
+require "tempfile"
+
+require "vagrant/util/downloader"
+
+module VagrantPlugins
+  module CommandVersion
+    class Command < Vagrant.plugin("2", :command)
+      def self.synopsis
+        "prints current and latest Vagrant version"
+      end
+
+      def execute
+        opts = OptionParser.new do |o|
+          o.banner = "Usage: vagrant version"
+        end
+
+        # Parse the options
+        argv = parse_options(opts)
+        return if !argv
+
+        # Output the currently installed version instantly.
+        @env.ui.output(I18n.t(
+          "vagrant.version_current", version: Vagrant::VERSION))
+        @env.ui.machine("version-installed", Vagrant::VERSION)
+
+        # Load the latest installed version to output that.
+        tf  = Tempfile.new("vagrant")
+        tf.close
+        url = "http://www.vagrantup.com/latest-version.json"
+        Vagrant::Util::Downloader.new(url, tf.path).download!
+
+        # Parse the JSON result
+        data = JSON.parse(File.read(tf.path))
+
+        # Output latest version
+        @env.ui.output(I18n.t(
+          "vagrant.version_latest", version: data["version"]))
+        @env.ui.machine("version-latest", data["version"])
+
+        # Determine if its a new version, and if so, output some more
+        # information.
+        current = Gem::Version.new(Vagrant::VERSION)
+        latest  = Gem::Version.new(data["version"])
+        if current >= latest
+          @env.ui.success(" \n" + I18n.t(
+            "vagrant.version_latest_installed"))
+          return 0
+        end
+
+        # Out of date! Let the user know how to upgrade.
+        @env.ui.output(" \n" + I18n.t(
+          "vagrant.version_upgrade_howto", version: latest.to_s))
+
+        0
+      end
+    end
+  end
+end

plugins/commands/version/plugin.rb

@@ -0,0 +1,18 @@
+require "vagrant"
+
+module VagrantPlugins
+  module CommandVersion
+    class Plugin < Vagrant.plugin("2")
+      name "version command"
+      description <<-DESC
+      The `version` command prints the currently installed version
+      as well as the latest available version.
+      DESC
+
+      command("version") do
+        require File.expand_path("../command", __FILE__)
+        Command
+      end
+    end
+  end
+end

templates/locales/en.yml

@@ -223,6 +223,23 @@ en:
       up some disk space.
 
       Press any other key to continue.
+    version_current: |-
+      Installed Version: %{version}
+    version_latest: |-
+      Latest Version: %{version}
+    version_latest_installed: |-
+      You're running an up-to-date version of Vagrant!
+    version_upgrade_howto: |-
+      To upgrade to the latest version, visit the downloads page and
+      download and install the latest version of Vagrant from the URL
+      below:
+
+        http://www.vagrantup.com/downloads.html
+
+      If you're curious what changed in the latest release, view the
+      CHANGELOG below:
+
+        https://github.com/mitchellh/vagrant/blob/v%{version}/CHANGELOG.md
     cfengine_config:
       classes_array: |-
         The 'classes' configuration must be an array.

website/docs/source/layouts/layout.erb

@@ -123,6 +123,7 @@
 									<li<%= sidebar_current("cli-status") %>><a href="/v2/cli/status.html">status</a></li>
 									<li<%= sidebar_current("cli-suspend") %>><a href="/v2/cli/suspend.html">suspend</a></li>
 									<li<%= sidebar_current("cli-up") %>><a href="/v2/cli/up.html">up</a></li>
+									<li<%= sidebar_current("cli-version") %>><a href="/v2/cli/version.html">version</a></li>
 									<li<%= sidebar_current("cli-nonprimary") %>><a href="/v2/cli/non-primary.html">More Commands</a></li>
 									<li<%= sidebar_current("cli-machinereadable") %>><a href="/v2/cli/machine-readable.html">Machine Readable Output</a></li>
 								</ul>

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

@@ -0,0 +1,15 @@
+---
+page_title: "vagrant version - Command-Line Interface"
+sidebar_current: "cli-version"
+---
+
+# Version
+
+**Command: `vagrant version`**
+
+This command tells you the version of Vagrant you have installed
+as well as the latest version of Vagrant that is currently available.
+
+In order to determine the latest available Vagrant version, this
+command must make a network call. If you only want to see the currently
+installed version, use `vagrant --version`.