command curl -sSL https://rvm.io/mpapis.asc | gpg --import -
command curl -sSL https://rvm.io/pkuczynski.asc | gpg --import -

\curl -sSL https://get.rvm.io | bash
# \curl -sSL https://get.rvm.io | bash -s stable --ruby
rvm install 2.3.0
gem install bundle

sudo apt install git postgresql libpq-dev nodejs

cat >> ~/.railsrc << HERE_DOC
-d postgresql # use postgresql
HERE_DOC

rails db:system:change --to=postgresql

rails new myapp
# to specify version you can use
rails _5.2.1_ new myapp
cd myapp
rails db:create
git init . && git add . && git commit -m "rails new myapp"

# config/initializers/generators.rb
Rails.application.config.generators do |g|
  g.helper false
end

bin/rails g migration enable_extension_for_uuid
last_migration
# add following line to migration
  def change
    # if you do not have priviledged deploy user than run as root
    # sudo su - postgres; psql ; CREATE EXTENSION pgcrypto;
    enable_extension 'pgcrypto' unless extension_enabled?('pgcrypto')
  end

cat >> config/initializers/generators.rb << HERE_DOC
Rails.application.config.generators do |g|
  g.orm :active_record, primary_key_type: :uuid
end
HERE_DOC

rake db:create db:migrate
git add .
git commit -m 'Enable uuid in postgresql'

  t.references :post, type: :uuid, index: true

DETAIL:  Key columns "post_id" and "id" are of incompatible types: bigint and uuid.

rails g controller pages index --no-stylesheets --no-helper --no-assets --no-jbuilder

sed -i "" -e '/^end$/i \
  # root page\
  root "pages#index"\
' config/routes.rb

rubocop --auto-correct # to autocorrent correct some files (except lineLength)

# initial scale on mobile devices
sed -i app/views/layouts/application.html.erb -e '/title/a \
    <meta content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" name="viewport">'

# Gemfile
# pick icons
gem 'fontello_rails_converter'

# select some fonts http://fontello.com/ and download zip to `tmp/fontello.zip`
bundle exec fontello convert --no-download
# restart rails server and open http://localhost:3000/fontello-demo.html
gnome-open http://localhost:300`expr $(get_current_viewport) + 1`/fontello-demo.html

# when you want to update you can
fontello open
# select new icons
bundle exec fontello convert

# app/assets/stylesheets/application.sass
// vendor
@import 'fontello'

# app/layouts/application.html.erb
<i class="demo-icon icon-mobile"></i>

fontello-cli --config fontello/config.json open

cp ~/Downloads/config.json fontello/
fontello-cli --config fontello/config.json install

gnome-open fontello/demo.html

cat >> .gitignore << 'HERE_DOC'
# vim temp files
*.swp
*.swo
# carrierwave upload files
/public/uploads
# gedit files
*~
# vagrant files
.vagrant
# byebug
.byebug_history
# rspec temporary file
spec/examples.txt
HERE_DOC
git commit -am "Update .gitignore"

cat >> Gemfile << HERE_DOC
group :development do
  # pretty print Ruby objects in full color
  gem 'awesome_print', require: 'ap'
  # static analysis security vulnerability scanner, run: `brakeman`
  gem 'brakeman', '~> 3.5.0', require: false
  # detect N+1 sql queries
  gem 'bullet'
  # detect out-of-date or vulnerable gems, run: `gemsurance`
  gem 'gemsurance'
  # automatic reload
  gem 'guard-livereload', require: false
  # open emails in browser
  gem 'letter_opener'
  # detect file changes
  gem 'listen', '~> 3.0.5'
  # support for Rails Panel - chrome extension
  gem 'meta_request'
  # debugger
  gem 'pry'
  gem 'pry-rails'
  # ruby static code analyzer
  gem 'rubocop', require: false
  # spring speeds up development by keeping your application running in the
  # background. Read more: https://github.com/rails/spring
  gem 'spring'
  gem 'spring-watcher-listen', '~> 2.0.0'
HERE_DOC

  # do not show assets in log\
  # gem "quiet_assets # can not find rails 5 version"\

  # irbtools includes interactive_editor gem (vim inside irb)\
  # just create ~/.irbrc with\
  # require "rubygems"\
  # require "irbtools"\
  gem "irbtools", require: "irbtools/binding"\

  # is not needed since rails will show line on which there is
  # exception (no need to insert console and use on web page).
  gem better_errors

  # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
  gem 'web-console', '>= 3.3.0'

  # config/application.rb
  # run with rails s -p b 0.0.0.0 to allow local network, allow remote requests\
  config.web_console.whiny_requests = false'

cat >> Gemfile << HERE_DOC
# adding vendor prefixes to css rules
gem "autoprefixer-rails"

# sets timezone based on browser timezone for each request
gem "browser-timezone-rails"
HERE_DOC

# need some js for timezone
cat >> app/assets/javascripts/application.js << HERE_DOC
//= require js.cookie
//= require jstz
//= require browser_timezone_rails/set_time_zone
HERE_DOC

bundle
guard init livereload
# gem https://github.com/guard/guard-livereload suggest some old extension
# https://addons.mozilla.org/en-US/firefox/addon/livereload/ but there is new
# https://addons.mozilla.org/en-US/firefox/addon/livereload-web-extension
# or you can use rack-livereload
# I receive error No such middleware to insert before: ActionDispatch::Static
# so better is to use browser plugin instead of gem 'rack-livereload'
# sed -i config/environments/development.rb -e '/^end/i \
#   # livereload\
#   # use rack-livereload or browser extension\
#   # if guard is not running, there is an error in js console:\
#   # Cross-origin plugin content from  must have a visible size larger than 400 x\
#   # 300 pixels, or it will be blocked. Invisible content is always blocked.\
#   config.middleware.insert_after ActionDispatch::Static, Rack::LiveReload\
# '

When I get error with command
RAILS_ENV=production rails assets:precompile
 No such middleware to insert before: ActionDispatch::Static
Than solution is to add `gem 'rails_12factor`, group: :production`
https://github.com/AssetSync/asset_sync/issues/221#issuecomment-75492905


cat > config/initializers/bullet.rb << HERE_DOC
if defined? Bullet
  Bullet.enable = true
  Bullet.alert = true
  Bullet.rails_logger = true
end
HERE_DOC

git add . && git commit -m "Adding guard and other useful gems"

# to run guard live reload, first increase max watches than just run guard
# https://github.com/guard/listen/wiki/Increasing-the-amount-of-inotify-watchers
# echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo
sysctl -p
guard -d
# livereload debug with `guard -d`. Error if you also run it on another project
# there should not be eventmachine.rb:530:in `start_tcp_server': no acceptor (port is in use or requires root privileges) (RuntimeError)

npm install typeface-roboto
mkdir app/assets/stylesheets/plugins
cat >> app/assets/stylesheets/plugins << HERE_DOC
@font-face {
  font-family: 'Roboto';
  font-style: normal;
  font-weight: 400;
  src: local('Roboto Regular'), local('Roboto-Regular'), asset-url('typeface-roboto/files/roboto-latin-400.woff') format('woff'), asset-url('typeface-roboto/files/roboto-latin-400.woff2') format('woff2');
}
@font-face {
  font-family: 'Roboto';
  font-style: normal;
  font-weight: 500;
  src: local('Roboto Medium'), local('Roboto-Medium'), asset-url('typeface-roboto/files/roboto-latin-500.woff') format('woff'), asset-url('typeface-roboto/files/roboto-latin-500.woff2') format('woff2');
}
@font-face {
  font-family: 'Roboto';
  font-style: normal;
  font-weight: 600;
  src: local('Roboto SemiBold'), local('Roboto-SemiBold'), asset-url('typeface-roboto/files/roboto-latin-500.woff') format('woff'), asset-url('typeface-roboto/files/roboto-latin-500.woff2') format('woff2');
}
@font-face {
  font-family: 'Roboto';
  font-style: normal;
  font-weight: 700;
  src: local('Roboto Bold'), local('Roboto-Bold'), asset-url('typeface-roboto/files/roboto-latin-700.woff') format('woff'), asset-url('typeface-roboto/files/roboto-latin-700.woff2') format('woff2');
}
HERE_DOC

cat >> app/assets/stylesheets/application.sass << HERE_DOC
// plugins
@import 'plugins/roboto_font_face'
HERE_DOC

cat >> app/assets/stylesheets/common/body.sass << HERE_DOC
body
  font-family: 'Roboto', sans-serif
HERE_DOC

sed -i app/views/layouts/application.html.erb -e '/yield/c \
  <div class="text-center">\
    <span class="notice text-success" id="notice"></span>\
    <span class="alert text-danger" id="alert"></span>\
  </div>\
  <script>\
    <%=raw "flash_message(document.getElementById('notice'), '#{j notice}');" if notice %>\
    <%=raw "flash_message(document.getElementById('alert'), '#{j alert}');" if alert %>\
  </script>\
\
  <article>\
    <%= yield %>\
  </article>'

cat > app/assets/javascripts/main.js.erb << 'HERE_DOC'
var FLASH_LETTER_STEP = 10;
var FLASH_DURATION = 5000;
function flash_appear(element, message, i) {
  if (i == undefined)
    i = 0;
  element.innerText = message.substring(0,i);
   setTimeout(function(){ 
    if (i<message.length)
      flash_appear(element, message, i+1);
  }, FLASH_LETTER_STEP);
}
function flash_dissapear(element, message, i) {
  if (message == undefined)
    message = element.innerText;
  if (i == undefined)
    i = message.length-1;
  element.innerText = message.substring(0,i);
  setTimeout(function(){ 
    if (i>0)
      flash_dissapear(element, message,i-1);
  }, FLASH_LETTER_STEP);
}

function flash_message(element, message) {
  flash_appear(element, message);
  setTimeout(function(){ flash_dissapear(element); }, FLASH_DURATION);
}
HERE_DOC
git add . && git commit -m "Adding flash to layout"

echo '
# css mixin library http://bourbon.io/
gem "bourbon", '~> 5.0.0.beta' # bourbon 5 is requred by bitters 1.3
# https://github.com/thoughtbot/bitters/issues/235
gem "neat"
' >> Gemfile
echo '
@import "bourbon";
@import "base/base"; // this is http://bitters.bourbon.io/
@import "neat";
' > app/assets/stylesheets/application.scss
git rm app/assets/stylesheets/application.css

bundle
gem install bitters
cd app/assets/stylesheets && bitters install
sed -i '/grid-settings/c @import "grid-settings";' base/_base.scss
cd -

git add . && git commit -m "Adding bourbon, neat and bitters scss"

sed -i Gemfile -e '/group :development do/a  \
  # slim templating\
  gem "slim-rails"'

gem install html2slim
erb2slim app/views/leads/index.html.erb

development: &default
  secret_key_base: <%= ENV["SECRET_KEY_BASE"] || 'some_secret' %>

test: *default
production:
  <<: *default
  monitor_mode: true

cat > config/secrets.yml << HERE_DOC
shared:
  secret_key_base: <%= ENV["SECRET_KEY_BASE"] || 'some_secret' %>

  # sending emails
  smtp_username: <%= ENV["SMTP_USERNAME"] %>
  smtp_password: <%= ENV["SMTP_PASSWORD"] %>

  # for all outgoing emails
  mailer_sender: <%= ENV["MAILER_SENDER"] || "My Company <[email protected]>" %>


# `shared` is automatically included, no need to write
# shared: &default
# development: *default
# or
# development:
#   <<: *default
HERE_DOC

git add . && git commit -m "Simplify secrets"

rails generate mailer UserMailer hello
git add . && git commit -am "rails generate mailer UserMailer hello"

sed -i app/mailers/application_mailer.rb -e '/default/c \
  default from: Rails.application.secrets.mailer_sender'

# if you need to get from rails 4 use { port: Rails::Server.new.options[:Port] }
# in config/environments/development.rb and also include
# require 'rails/commands/server` on the top of the file

# for rails 5 you can use Rack::Server.new.options[:Port] and no need to
# require anything, but it works only if you provide -p param to rails s
# and it should be callend only once, like I did in const.rb

# config/application.rb
    link = {
      host: (Rails.env.production? ? 'myapp.herokuapp.com' : 'localhost'),
      # in test we set up port manually to 3333 in test/a/capybara.rb
      port: (Rails.env.production? ? nil : Rails.env.development? ? Rack::Server.new.options[:Port] : 3333),
    }
    # for link urls in emails
    config.action_mailer.default_url_options = link
    # for link urls in rails console
    config.after_initialize do
      Rails.application.routes.default_url_options = link
    end
    # for asset-url or img_tag in emails
    config.action_mailer.asset_host = "//#{link[:host]}:#{link[:port]}"

sed -i '/group :development do/a  \
  # open emails in browser\
  gem "letter_opener"' Gemfile
sed -i '/^end$/i \  config.action_mailer.delivery_method = :letter_opener' config/environments/development.rb 
bundle && git add . && git commit -m "Letter opener to see emails in browser"
rails runner UserMailer.hello.deliver

echo "gem 'clearance'" >> Gemfile && bundle
rails generate clearance:install
rake db:migrate
rails generate clearance:routes
git add . && git commit -m "rails g clearance:install"

sed -i '/<body>/a \\n\
  <nav>\
    <% if signed_in? %>\
      <%= current_user.email %>\
      <%= button_to "Sign out", sign_out_path, method: :delete %>\
    <% else %>\
      <%= link_to "Sign in", sign_in_path %>\
    <% end %>\
  </nav>\
' app/views/layouts/application.html.erb
git add . && git commit -m "Adding sign signout path"

rails g scaffold company name:string user:references --no-stylesheets --no-helper --no-assets --no-jbuilder
# --no-fixture --no-test-framework
# or put in config/environments/development.rb
  config.generators do |generate|
    generate.helper false
    generate.stylesheets false
  end

sed -i '/companies/a \  root "companies#index"' config/routes.rb
rake db:migrate && git add . && git commit -m "rails g scaffold company name:string user:references"

export RAILS_MAX_THREADS=1
curl $u/action_with_sleep_10 &
curl $u/action_with_sleep_10 &
# real 10s
# real 20s


export RAILS_MAX_THREADS=2
curl $u/action_with_sleep_10 &
curl $u/action_with_sleep_10 &
# real 10s
# real 10s

cat >> Gemfile <<HERE_DOC
gem 'puma'
HERE_DOC
bundle

# Rails 5 puma is default, and config/puma.rb is used, so do not need Procfile
# but is it advisable to write it and put rake db:migrate so you do not need to
# run migration after you deploy. Restart is not needed as it was needed after
# heroku run rake db:migrate (there are no exception, but update was not
# actually saved in new columns, so restart was needed)
cat >> Procfile <<HERE_DOC
web: bundle exec puma -C config/puma.rb
worker: bin/delayed_job run --queues=webapp,mailers
release: rake db:migrate
HERE_DOC

# if you use unicorn and sidekiq than Procfile will be
web: bundle exec unicorn -p $PORT -c ./config/unicorn.rb
worker: sidekiq
release: rake db:migrate

# default puma config is fine, but on production should include those lines
cat >> config/puma.rb <<HERE_DOC
# should match number of CPU cores: grep -c processor /proc/cpuinfo
workers Integer(ENV['WEB_CONCURRENCY'] || 2)
threads_count = Integer(ENV['RAILS_MAX_THREADS'] || 5)
threads threads_count, threads_count

preload_app!

rackup      DefaultRackup
port        ENV['PORT']     || 3000
environment ENV['RACK_ENV'] || 'development'

on_worker_boot do
  # Worker specific setup for Rails 4.1+
  # See: https://devcenter.heroku.com/articles/deploying-rails-applications-with-the-puma-web-server#on-worker-boot
  ActiveRecord::Base.establish_connection
end
HERE_DOC

# on development always use single mode
mkdir config/puma
cat >> config/puma/development.rb <<HERE_DOC
workers 0
HERE_DOC

sudo systemctl daemon-reload
sudo systemctl enable puma.service
sudo systemctl start puma.service

  passenger_enabled on;

bundle lock --add-platform x86_64-linux

heroku apps:info
heroku stack
heroku stack:set heroku-16

export MYAPP_NAME=my-app # only dash, not underscore
# # postgresql on production
# sed -i Gemfile -e "/gem 'sqlite3/c \
# gem 'pg'"
# sed -i '/adapter: sqlite3/c \  adapter: postgresql' config/database.yml
# sed -i "/development.sqlite3/c \  database: ${MYAPP_NAME}_dev" config/database.yml
# sed -i "/test.sqlite3/c \  database: ${MYAPP_NAME}_test" config/database.yml
# sed -i "/production.sqlite3/c \  database: ${MYAPP_NAME}_prod" config/database.yml
#
# rails in production use: production: url: <%= ENV['DATABASE_URL'] %>

cat >> Gemfile << HERE_DOC
# heroku uses this 12 factor gem
gem 'rails_12factor', group: :production
HERE_DOC
bundle
git commit -am "Heroku uses 12factor gem"

heroku apps:create $MYAPP_NAME # heroku create application name, no underscores
heroku addons:create heroku-postgresql:hobby-dev # this will set DATABASE_URL
git push heroku master --set-upstream

# heroku run rails db:setup will raise error:
# PG::ConnectionBad: FATAL:  permission denied for database "postgres"
# DETAIL:  User does not have CONNECT privilege
# https://kb.heroku.com/why-am-i-seeing-user-does-not-have-connect-privilege-error-with-heroku-postgres-on-review-apps
# so instead of create you just need to run migration and seed
heroku run rails db:migrate db:seed

# heroku pg:info
# heroku pg:reset --confirm $MYAPP_NAME
# heroku pg:reset --confirm `[[ $(git remote get-url heroku) =~ https...git.heroku.com.(.*).git ]] && echo ${BASH_REMATCH[1]}`
# heroku pg:reset --confirm ${PWD##*/}
# heroku restart
#
# I do not know how to drop db since db:migrate:reset does not work either

# sometimes you need to recompile assets when you change secrets but assets are
# not changed, and you need to purge cache, install plugin
# https://github.com/heroku/heroku-repo
# heroku plugins:install heroku-repo
# heroku repo:purge_cache

rails db:drop
heroku pg
# find name after "Add-on:"
heroku pg:pull postgresql-name-on-heroku my_rails_app_development
# or in one command
bundle exec rake db:drop
rails db:drop && heroku pg:pull `heroku pg|grep Add|awk '{print $2}'` `bundle exec rails runner "puts ActiveRecord::Base.configurations['development']['database']"`
# or dump in one command
DISABLE_DATABASE_ENVIRONMENT_CHECK=1 rails db:drop && heroku pg:pull `heroku pg|grep Add|awk '{print $2}'` `bundle exec rails runner "puts ActiveRecord::Base.configurations['development'][:database]"`

# also pushing
# heroku pg:reset --confirm `[[ $(git remote get-url heroku) =~ https...git.heroku.com.(.*).git ]] && echo ${BASH_REMATCH[1]}`
heroku pg:push `bundle exec rails runner "puts ActiveRecord::Base.configurations['development'][:database]"` `heroku pg|grep Add|awk '{print $2}'`

WARNING: Rails was not able to disable referential integrity.

This is most likely caused due to missing permissions.
Rails needs superuser privileges to disable referential integrity.

    cause: PG::InsufficientPrivilege: ERROR:  permission denied: "RI_ConstraintTrigger_a_16717182" is a system trigger

rails aborted!

ActiveRecord::InvalidForeignKey: PG::ForeignKeyViolation: ERROR:  insert or update on table "posts" violates foreign key constraint "fk_rails_5b5ddfd518"
DETAIL:  Key (user_id)=(338193910) is not present in table "users".

heroku run rake db:populate_sample_data DISABLE_DATABASE_ENVIRONMENT_CHECK=1

heroku plugins:install heroku-repo
heroku repo:purge_cache -a appname
git commit --allow-empty -m "Purge cache"
git push heroku master

heroku plugins:install heroku-builds
heroku builds:cache:purge -a example-app

heroku repo:reset

heroku certs
heroku certs:info

heroku pg:backups:capture # it will create b002.dump
heroku pg:backups:download # it will download to latest.dump

export DUMP_FILE=tmp/b001.dump
export DATABASE_NAME=$(rails runner 'puts ActiveRecord::Base.configurations["development"]["database"]')

# pg_dump $DATABASE_NAME > $DUMP_FILE
# we must use heroku style, replace: mypassword myuser and mydb
# PGPASSWORD=mypassword pg_dump -Fc --no-acl --no-owner -h localhost -U myuser $DATABASE_NAME > $DUMP_FILE
pg_dump -Fc --no-acl --no-owner $DATABASE_NAME > $DUMP_FILE
scp $DUMP_FILE 192.168.1.3:
ssh 192.168.1.3
sudo cp b001.dump /var/www/html/

heroku pg:backups restore --confirm move-index http://trkcam.duckdns.org/b001.dump DATABASE_URL
heroku pg:backups

chmod a+r $DUMP_FILE

rake db:drop db:create db:migrate

# textual dump
psql $DATABASE_NAME < $DUMP_FILE

# binary dump
# this works when pg_dump version are different and `heroku pg:pull postgresql-symmetrical my_dev` does not work
sudo su postgres -c "pg_restore -d $DATABASE_NAME --clean --no-acl --no-owner -h localhost $DUMP_FILE"

ActiveRecord::StatementInvalid (PG::NotNullViolation: ERROR:  null value in column "id" violates not-null constraint

\d users
Column          |            Type             | Collation | Nullable | Default
----------------+-----------------------------+-----------+----------+---------
 id             | integer                     |           | not null | nextval('payments_id_seq'::regclass)

\d payments
Column          |            Type             | Collation | Nullable | Default 
-------------------+--------------------------+-----------+----------+---------
 id             | integer                     |           | not null | 

heroku pg:backups restore --confirm playcityapi https://s3.amazonaws.com/duleorlovic-test-us-east-1/b001.dump DATABASE_URL

heroku addons:create heroku-postgresql:hobby-basic
# Creating heroku-postgresql:hobby-basic on ⬢ myapp... $9/month
# Database has been created and is available
#  ! This database is empty. If upgrading, you can transfer
#  ! data from another database with pg:copy
# Created postgresql-defined-42601 as HEROKU_POSTGRESQL_CHARCOAL_URL
# Use heroku addons:docs heroku-postgresql to view documentation

heroku pg:copy DATABASE_URL HEROKU_POSTGRESQL_CHARCOAL_URL
# ▸    WARNING: Destructive action
#  ▸    This command will remove all data from CHARCOAL
#  ▸    Data from DATABASE will then be transferred to CHARCOAL
#  ▸    To proceed, type myapp or re-run this command with --confirm myapp
# 
# > myapp
# Starting copy of DATABASE to CHARCOAL... done
# Copying... done

heroku pg:info
heroku addons:create heroku-postgresql:standard-0
# save the variable name HEROKU_POSTGRESQL_{some color}_URL
heroku maintenance:on
heroku pg:copy DATABASE_URL HEROKU_POSTGRESQL_color_URL
heroku pg:promote HEROKU_POSTGRESQL_color_URL
heroku maintenance:off
# this is not neccessary since it is updated
# heroku config:set DATABASE_URL=....url from config
heroku addons:destroy HEROKU_POSTGRESQL_color_old_URL

heroku config:pull -f .env.production 
heroku config:push --file=.env.production 

heroku pg:copy DATABASE_URL HEROKU_POSTGRESQL_TEAL_URL
heroku pg:promote HEROKU_POSTGRESQL_TEAL_URL
heroku config # find color of old database
heroku addons:destroy HEROKU_POSTGRESQL_NAVY_URL

# deploy to heroku
heroku buildpacks:set heroku/ruby # https://github.com/heroku/heroku-buildpack-ruby
heroku buildpacks:add --index 1 heroku/nodejs # https://github.com/heroku/heroku-buildpack-nodejs

heroku buildpacks # should return  1. nodejs  2. ruby (latest wins :)

# .buildpacks
https://github.com/heroku/heroku-buildpack-ruby
https://github.com/heroku/heroku-buildpack-nodejs

# package.json
  "engines": {
    "node": "14.x"
  }

git rm -rf public
echo '/public
/node_modules' >> .gitignore
git add .gitignore
git commit -m "Remove public folder from git repo"

echo '{
  "name": "rootApp",
  "scripts": {
  },
  "dependencies": {
    "myappAngular": "file:./client"
  },
  "cacheDirectories": [
    "client/node_modules",
    "client/bower_components"
  ]
}
' > package.json
git add package.json && git commit -m "Add package.json for nodejs buildpack detect"

cd client
sed -i "/dist: 'dist/c \  dist: '../../public'," gulp/conf.js
sed -i '/"scripts":/a \    "postinstall": "bower install && gulp build",' package.json
sed -i '/"devDependencies":/c \  "dependencies": {\
    "bower": "*",' package.json
git add . && git commit -m "Configure postinstall gulp build"
cd ..

git push heroku
heroku config # NPM_CONFIG_PRODUCTION=true NODE_ENV=production NODE_MODULES_CACHE=true
heroku open
# usefull command to test is `npm install`
# git commit --amend --allow-empty --no-edit && echo "output is saved: cat log/heroku.log" && git push heroku -f > log/heroku.log 2>&1 && heroku run bash -c 'mysql -v'

# app/controllers/index_controller.rb
class IndexController < ApplicationController
  def index
    interval_sleep
    render json: { hello: :there }
  end

  def interval_sleep
    # 40ms - 200ms
    sleep(rand(2..10).to_f / 50)
  end
end

# bin/siege.sh
#! /bin/bash

CONCURRENCY=30
URL='http://localhost:3000/index'
CONTENT_TYPE='application/json'
REPS=20

siege -b --content-type $CONTENT_TYPE -c $CONCURRENCY -r $REPS $URL

# flags:
#   -b - benchmark means no gap between requests
#   -c - concurrency is number of requests to make at one time
#   -r - repititions is the number of times to run
#         the same amount of concurrent requests

heroku labs:enable log-runtime-metrics
heroku restart

2020-11-19T10:21:34.368101+00:00 heroku[web.5]: source=web.5 dyno=heroku.30259387.5e6b3e82-4fd2-40b2-a3da-a22a1b27aa4a sample#memory_total=725.98MB sample#memory_rss=721.84MB sample#memory_cache=4.04MB sample#memory_swap=0.11MB sample#memory_pgpgin=188980pages sample#memory_pgpgout=3156pages sample#memory_quota=1024.00MB