## USAGE: rails new <app name> -m path/to/file.rb

# Modified Gemfile
# replaced sqlite3 with postgresql
# if you still want to use sqlite3 comment out the next couple lines
gsub_file 'Gemfile', "# Use sqlite3", "# Use postgresql"
gsub_file 'Gemfile', "gem 'sqlite3'", "gem 'pg'"

# sass-rails is outdated, replaced with sassc-rails gem
gsub_file 'Gemfile', "gem 'sass-rails', '~> 5.0'", "gem 'sassc-rails'"

# inserted gems required for bootstrap
insert_into_file 'Gemfile',
"\n\n# gems required for bootstrap
gem 'sprockets-rails'
gem 'bootstrap'
gem 'jquery-rails'",
after: "gem 'bootsnap', '>= 1.1.0', require: false"

# Renamed application.css to application.scss
copy_file 'app/assets/stylesheets/application.css', 'app/assets/stylesheets/application.scss'
remove_file 'app/assets/stylesheets/application.css'

# Modified application.scss for bootstrap
gsub_file 'app/assets/stylesheets/application.scss', '= require_tree .', ''
gsub_file 'app/assets/stylesheets/application.scss', '= require_self', ''
append_to_file 'app/assets/stylesheets/application.scss', "@import 'bootstrap';"

# Modified application.js file for bootstrap
insert_into_file 'app/assets/javascripts/application.js',
    "\n//= require jquery3\n//= require popper\n//= require bootstrap-sprockets",
    after: '//= require rails-ujs'