Small ruby script to print the Profiles from ~/.aws/config

awsprofiles.rb

require 'colorize'
require 'inifile'

show_details  = ARGV.include? '-d'
filter        = ARGV.select { |a| not a.start_with?('-') }
filter        = '.*' if filter.empty?
ini           = IniFile.load('/Users/igor/.aws/config')
output        = []

def random_colors
  skip_colors = [:black, :light_black, :blue, :light_blue, :default]
  return String.colors.shuffle.select { |c| not skip_colors.include? c}
end

def get_account(arn)
  return arn.scan(/arn:aws:.*:(.*):.*/).last.first
end

def color_params(ini)
  colors  = random_colors
  src     = { }

  ini.each do |s,k,v|
    case k
    when 'source_profile' then src[v] = v.colorize(colors[src.length])
    when 'role_arn'       then
      acct = get_account(v)
      src[acct] = acct.colorize(colors[src.length % colors.length])
    end
  end
  return src
end

def color_profiles(ini)
  colors  = random_colors
  tar     = { }

  ini.each_section do |s|
    prof = s.gsub(/^profile /, '')
    tar[prof] = prof.colorize(colors[tar.length % colors.length])
  end
  return tar
end

profiles  = color_profiles(ini)
params    = color_params(ini)

sections = ini.sections.select { |s| s =~ /#{filter}/ }
sections.each do |s|
  prof = s.gsub(/^profile /, '')
  output << "Profile #{profiles[prof]}"

  if show_details
    if ini[s].has_key?('source_profile')
      p = ini[s]['source_profile']
      output << "  Source Profile: #{params[p]}"
    end

    if ini[s].has_key?('role_arn')
      p = ini[s]['role_arn']
      output << "  Account: #{params[get_account(p)]}"
    end
  end
end

output.each { |s| puts s }

Gemfile

source 'https://rubygems.org'

gem 'colorize'
gem 'inifile'