Start server as vagrant command

Gemfile

@@ -7,3 +7,5 @@ if File.exist?(File.expand_path("../../vagrant-spec", __FILE__))
 else
   gem 'vagrant-spec', git: "https://github.com/hashicorp/vagrant-spec.git", branch: :main
 end
+
+gem "pry-byebug"

bin/vagrant-server.rb

@@ -9,12 +9,12 @@ require 'grpc/health/v1/health_services_pb'
 
 class PluginService < Hashicorp::Vagrant::RubyVagrant::Service
   def get_plugins(req, _unused_call)
+    
     plugins = [Hashicorp::Vagrant::Plugin.new(name: "test")]
     Hashicorp::Vagrant::GetPluginsResponse.new(
       plugins: plugins
     )
   end
-
 end
 
 def main

plugins/commands/serve/command.rb

@@ -0,0 +1,59 @@
+require_relative "./service/plugin_service"
+require "optparse"
+require 'grpc'
+require 'grpc/health/checker'
+require 'grpc/health/v1/health_services_pb'
+
+module VagrantPlugins
+  module CommandServe
+    class Command < Vagrant.plugin("2", :command)
+
+      DEFAULT_PORT = 10001
+
+      def self.synopsis
+        "start Vagrant server"
+      end
+
+      def execute
+        options = {}
+
+        opts = OptionParser.new do |o|
+          o.banner = "Usage: vagrant serve"
+          o.separator ""
+          o.separator "Options:"
+          o.separator ""
+
+          o.on("--port PORT", "Port to start the GRPC server on, defaults to 10001") do |port|
+            options[:port] = port
+          end
+        end
+
+        # Parse the options
+        argv = parse_options(opts)
+        return if !argv
+        options[:port] ||= DEFAULT_PORT
+        serve(options[:port])
+      end
+
+      private
+
+      def serve(port=10001)
+        s = GRPC::RpcServer.new
+        # Listen on port 10001 on all interfaces. Update for production use.
+        s.add_http2_port("[::]:#{port}", :this_port_is_insecure)
+      
+        s.handle(VagrantPlugins::CommandServe::Serve::PluginService.new)
+      
+        health_checker = Grpc::Health::Checker.new
+        health_checker.add_status(
+          "Service::PluginService",
+          Grpc::Health::V1::HealthCheckResponse::ServingStatus::SERVING)
+        s.handle(health_checker)
+      
+        STDOUT.puts "1|1|tcp|127.0.0.1:#{port}|grpc"
+        STDOUT.flush
+        s.run_till_terminated_or_interrupted([1, 'int', 'SIGQUIT', 'SIGINT'])
+      end
+    end
+  end
+end

plugins/commands/serve/plugin.rb

@@ -0,0 +1,17 @@
+require "vagrant"
+
+module VagrantPlugins
+  module CommandServe
+    class Plugin < Vagrant.plugin("2")
+      name "start Vagrant server"
+      description <<-DESC
+      Start Vagrant in server mode
+      DESC
+
+      command("serve") do
+        require File.expand_path("../command", __FILE__)
+        Command
+      end
+    end
+  end
+end

plugins/commands/serve/service/plugin_service.rb

@@ -0,0 +1,18 @@
+require_relative 'proto/gen/ruby-server_pb'
+require_relative 'proto/gen/ruby-server_services_pb'
+
+module VagrantPlugins
+  module CommandServe
+    module Serve
+      class PluginService < Hashicorp::Vagrant::RubyVagrant::Service
+        def get_plugins(req, _unused_call)
+          
+          plugins = [Hashicorp::Vagrant::Plugin.new(name: "test")]
+          Hashicorp::Vagrant::GetPluginsResponse.new(
+            plugins: plugins
+          )
+        end
+      end
+    end
+  end
+end

vagrant.gemspec

@@ -19,6 +19,7 @@ Gem::Specification.new do |s|
   s.add_dependency "childprocess", "~> 4.1.0"
   s.add_dependency "ed25519", "~> 1.2.4"
   s.add_dependency "erubi"
+  s.add_dependency "grpc"
   s.add_dependency "hashicorp-checkpoint", "~> 0.1.5"
   s.add_dependency "i18n", "~> 1.8"
   s.add_dependency "listen", "~> 3.6"