Add Alter The Rails Setup Script as a Rails TIL

Author: jbranchaud

README.md

@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
 
-_1373 TILs and counting..._
+_1374 TILs and counting..._
 
 ---
 
@@ -812,6 +812,7 @@ _1373 TILs and counting..._
 - [Allow List Params Anywhere With Strong Params](rails/allow-list-params-anywhere-with-strong-params.md)
 - [All or Nothing Database Transactions](rails/all-or-nothing-database-transactions.md)
 - [Alphabetize Schema Columns To Keep Them Consistent](rails/alphabetize-schema-columns-to-keep-them-consistent.md)
+- [Alter The Rails Setup Script](rails/alter-the-rails-setup-script.md)
 - [Assert Two Arrays Have The Same Items With RSpec](rails/assert-two-arrays-have-the-same-items-with-rspec.md)
 - [Attach A File With Capybara](rails/attach-a-file-with-capybara.md)
 - [Attribute Getter without the Recursion](rails/attribute-getter-without-the-recursion.md)

rails/alter-the-rails-setup-script.md

@@ -0,0 +1,38 @@
+# Alter The Rails Setup Script
+
+When you generate a new Rails app, a set of scripts are put in the `bin/`
+folder of your new app. These _bin scripts_ are ruby scripts that you can use
+to run `rails` commands, `rake` commands, as well as `setup` your rails
+project.
+
+These scripts can be modified like you'd modify any other ruby code.
+
+In fact, the `setup` scripts encourages you to modify it by providing an
+example of an additional setup step you can add.
+
+```bash
+#!/usr/bin/env ruby
+require "fileutils"
+
+# ...
+
+FileUtils.chdir APP_ROOT do
+  # This script is a way to set up or update your development environment automatically.
+  # This script is idempotent, so that you can run it at any time and get an expectable outcome.
+  # Add necessary setup steps to this file.
+
+  puts "\n== Installing dependencies =="
+  system! "gem install bundler --conservative"
+  system("bundle check") || system!("bundle install")
+
+  # puts "\n== Copying sample files =="
+  # unless File.exist?("config/database.yml")
+  #   FileUtils.cp "config/database.yml.sample", "config/database.yml"
+  # end
+
+  # ...
+end
+```
+
+There are several steps built in, but it provides an example of how you can
+copy a sample YAML file to be the actual version of that YAML file.