Create binstub without bundler, document it all agnostically

You can use MRSK with something other than Rails.

README.md

@@ -1,10 +1,10 @@
 # MRSK
 
-MRSK deploys Rails apps in containers to servers running Docker with zero downtime. It uses the dynamic reverse-proxy Traefik to hold requests while the new application container is started and the old one is stopped. It works seamlessly across multiple hosts, using SSHKit to execute commands.
+MRSK deploys web apps in containers to servers running Docker with zero downtime. It uses the dynamic reverse-proxy Traefik to hold requests while the new application container is started and the old one is stopped. It works seamlessly across multiple hosts, using SSHKit to execute commands.
 
 ## Installation
 
-Install MRSK globally with `gem install mrsk`. Then, inside your app directory, run `mrsk install`. Now edit the new file `config/deploy.yml`. It could look as simple as this:
+Install MRSK globally with `gem install mrsk`. Then, inside your app directory, run `mrsk init` (or `mrsk init --bundle` within Rails apps where you want a bin/mrsk binstub). Now edit the new file `config/deploy.yml`. It could look as simple as this:
 
 ```yaml
 service: hey
@@ -20,10 +20,12 @@ env:
     - RAILS_MASTER_KEY
 ```
 
-Now you're ready to deploy a multi-arch image to the servers:
+Then edit your `.env` file to add your registry password as `MRSK_REGISTRY_PASSWORD` (and your `RAILS_MASTER_KEY` for production with a Rails app).
+
+Now you're ready to deploy to the servers:
 
 ```
-RAILS_MASTER_KEY=123 MRSK_REGISTRY_PASSWORD=pw mrsk deploy
+mrsk deploy
 ```
 
 This will:

lib/mrsk/cli/main.rb

@@ -74,22 +74,29 @@ class Mrsk::Cli::Main < Mrsk::Cli::Base
     end
   end
 
-  desc "install", "Create config stub in config/deploy.yml and binstub in bin/mrsk"
-  option :skip_binstub, type: :boolean, default: false, desc: "Skip adding MRSK to the Gemfile and creating bin/mrsk binstub"
-  def install
+  desc "init", "Create config stub in config/deploy.yml and env stub in .env"
+  option :bundle, type: :boolean, default: false, desc: "Add MRSK to the Gemfile and create a bin/mrsk binstub"
+  def init
     require "fileutils"
 
     if (deploy_file = Pathname.new(File.expand_path("config/deploy.yml"))).exist?
       puts "Config file already exists in config/deploy.yml (remove first to create a new one)"
     else
+      FileUtils.mkdir_p deploy_file.dirname
       FileUtils.cp_r Pathname.new(File.expand_path("templates/deploy.yml", __dir__)), deploy_file
       puts "Created configuration file in config/deploy.yml"
     end
 
-    unless options[:skip_binstub]
+    unless (deploy_file = Pathname.new(File.expand_path(".env"))).exist?
+      FileUtils.cp_r Pathname.new(File.expand_path("templates/template.env", __dir__)), deploy_file
+      puts "Created .env file"
+    end
+
+    if options[:bundle]
       if (binstub = Pathname.new(File.expand_path("bin/mrsk"))).exist?
         puts "Binstub already exists in bin/mrsk (remove first to create a new one)"
       else
+        puts "Adding MRSK to Gemfile and bundle..."
         `bundle add mrsk`
         `bundle binstubs mrsk`
         puts "Created binstub file in bin/mrsk"

lib/mrsk/cli/templates/template.env

@@ -0,0 +1,2 @@
+MRSK_REGISTRY_PASSWORD=change-this
+RAILS_MASTER_KEY=another-env