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Express guide to a rails 3.2+ testing custom app subdomains using cucumber capybara with a pow setup... along with devise mailer config helper example (useful if you need to test various auth situations for custom subdomains in a rails app).

If you haven't used pow, I wouldn't recommend it for local web dev... there's much better gems for local web dev like unicorn-rails or passenger nginx standalone are far better choices IMHO. I use pow for all the local name redirects to a port like explained below, with a rails dev server listening on that port running unicorn-rails.

So we're going to use it for the awesome subdomain redirect to a local customapp.dev on a specific port magic mojo.

First install pow.cx

• now go to pow.cx and install
• cd ~/.pow

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If you run into terminal error too many open files

Below are the steps to increase the limit environment setting for maxflies

Show current config:

launchctl limit

maxfiles 256 unlimited

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# rbenv & brew git/bash completion terminal setup
# for dev desktop only on osx
# Run the following commands in order to use this script:
################################################################
# !! => Update/Install xcode Command Line Tools <= !!
# In your shell/terminal:
# Homebrew perms needed:
# sudo chown -R root:admin /usr/local
# sudo chown -R root:admin /Library/Caches/Homebrew
# ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

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# *** Application-specific options follow here ***

#
# The MySQL server
#
[mysqld]

# The maximum amount of concurrent sessions the MySQL server will
# allow. One of these connections will be reserved for a user with
# SUPER privileges to allow the administrator to login even if the

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[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0

# The maximum amount of concurrent sessions the MySQL server will
# allow. One of these connections will be reserved for a user with
# SUPER privileges to allow the administrator to login even if the

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# https://medium.com/@frontman/how-to-parse-yaml-string-via-command-line-374567512303

alias yaml2json="python3 -c 'import sys,json,yaml;f=open(sys.argv[1]);d=yaml.safe_load(f);f.close();print(json.dumps(d))'"

# yaml2json ./vars.yml | jq ...

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[user]
    name = yourname
    email = yourname @ whatever
[core]
    excludesfile = yourhomedir/.gitignore
    #git config --global core.eol lf
    #git config --global core.autocrlf input
    eol = lf
    autocrlf = input
    #git rm -rf --cached .

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# sudo rm -rf /Library/Frameworks/Python.framework
sudo rm -rf /Library/Frameworks/Python.framework/Versions/2.7
sudo rm -rf "/Applications/Python 2.7"

cd /usr/local/bin && \
sudo ls -l /usr/local/bin | grep '../Library/Frameworks/Python.framework/Versions/2.7' | awk '{print $9}' | xargs rm

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Mac Homebrew (RVM/MySQL/Redis) setup

Follow the steps below to setup a local development environment:

XQuartz

Recommended to download latest XQuartz

iTerm2

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# just an active_record migration example for reference
# source of this logic: https://github.com/rails/rails/blob/master/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb

class CreateMetaTexts < ActiveRecord::Migration
  def up
    create_table :meta_texts do |t|

      t.text :default_text_63KB, limit: 63.kilobytes # 64512 < 65535 limit for when text datatype changes to mediumtext datatype 
      t.text :medium_text_64KB, limit: 64.kilobytes # 65536 > 65535 limit and triggers text datatype to mediumtext datatype
      t.text :medium_text_15MB, limit: 15.megabytes # 15728640 < 16777215 limit for when mediumtext changes to longtext datatype