Class: Jets::Application

Inherits:
Object
  • Object
show all
Extended by:
Memoist
Includes:
Middleware, Singleton
Defined in:
lib/jets/application.rb

Defined Under Namespace

Modules: Middleware

Constant Summary collapse

ENV_MAP =

Use the shorter name in stack names, but use the full name when it comes to checking for the env.

Example:

Jets.env: 'development'
Jets.config.project_namespace: 'demo-dev'

{
  development: 'dev',
  production: 'prod',
  staging: 'stag',
}

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Middleware

#assemble_app, #call

Class Method Details

.default_iam_policy ⇒ Object 



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# File 'lib/jets/application.rb', line 148

def self.default_iam_policy
  project_namespace = Jets.project_namespace
  logs = {
    action: ["logs:*"],
    effect: "Allow",
    resource: "arn:aws:logs:#{Jets.aws.region}:#{Jets.aws.}:log-group:/aws/lambda/#{project_namespace}-*",
  }
  s3_bucket = Jets.aws.s3_bucket
  s3_readonly = {
    action: ["s3:Get*", "s3:List*"],
    effect: "Allow",
    resource: "arn:aws:s3:::#{s3_bucket}*",
  }
  s3_bucket = {
    action: ["s3:ListAllMyBuckets", "s3:HeadBucket"],
    effect: "Allow",
    resource: "arn:aws:s3:::*", # scoped to all buckets
  }
  policies = [logs, s3_readonly, s3_bucket]

  if Jets::Stack.has_resources?
    cloudformation = {
      action: ["cloudformation:DescribeStacks"],
      effect: "Allow",
      resource: "arn:aws:cloudformation:#{Jets.aws.region}:#{Jets.aws.}:stack/#{project_namespace}*",
    }
    policies << cloudformation
  end
  policies
end

Instance Method Details

#aws ⇒ Object 



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# File 'lib/jets/application.rb', line 217

def aws
  Jets::AwsInfo.new
end

#config ⇒ Object

Default config



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# File 'lib/jets/application.rb', line 27

def config
  config = ActiveSupport::OrderedOptions.new

  config.prewarm = ActiveSupport::OrderedOptions.new
  config.prewarm.enable = true
  config.prewarm.rate = '30 minutes'
  config.prewarm.concurrency = 2
  config.prewarm.public_ratio = 3
  config.prewarm.rack_ratio = 5

  config.gems = ActiveSupport::OrderedOptions.new
  config.gems.sources = [
    'https://gems.lambdagems.com'
  ]

  config.inflections = ActiveSupport::OrderedOptions.new
  config.inflections.irregular = {}

  config.assets = ActiveSupport::OrderedOptions.new
  config.assets.folders = %w[public]
  config.assets.base_url = nil # IE: https://cloudfront.com/my/base/path
  config.assets.max_age = 3600
  config.assets.cache_control = nil # IE: public, max-age=3600 , max_age is a shorter way to set cache_control.

  config.ruby = ActiveSupport::OrderedOptions.new
  config.ruby.lazy_load = true # also set in config/environments files

  config
end

#configure(&block) ⇒ Object 



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# File 'lib/jets/application.rb', line 11

def configure(&block)
  instance_eval(&block) if block
end

#eval_app_config ⇒ Object 



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# File 'lib/jets/application.rb', line 98

def eval_app_config
  app_config = "#{Jets.root}config/application.rb"
  load app_config if File.exist?(app_config)
end

#internal_autoload_paths ⇒ Object 



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# File 'lib/jets/application.rb', line 66

def internal_autoload_paths
  internal = File.expand_path("../internal", __FILE__)
  paths = %w[
    app/controllers
    app/models
    app/jobs
  ]
  paths.map { |path| "#{internal}/#{path}" }
end

#load_app_config ⇒ Object

First time loading this might not have all the values. Some values like project_namespace depend on project_name. Loading the config twice resolves the chicken and egg problem here.



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# File 'lib/jets/application.rb', line 88

def load_app_config
  eval_app_config
  # Normalize config and setup some shortcuts
  set_dependent_configs! # things like project_namespace that need project_name
  eval_app_config # twice to fix values that rely on the dependent configs

  set_iam_policy # relies on dependent values, must be called late
  normalize_env_vars!
end

#load_configs ⇒ Object 



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# File 'lib/jets/application.rb', line 76

def load_configs
  # The Jets default/application.rb is loaded.
  load File.expand_path("../default/application.rb", __FILE__)
  # Then project config/application.rb is loaded.
  load_app_config
  load_db_config
  load_environments_config
end

#load_db_config ⇒ Object 



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# File 'lib/jets/application.rb', line 191

def load_db_config
  config.database = {}

  Jets::Dotenv.load!
  database_yml = "#{Jets.root}config/database.yml"
  if File.exist?(database_yml)
    text = Jets::Erb.result(database_yml)
    db_config = YAML.load(text)
    config.database = db_config
  end
end

#load_environments_config ⇒ Object 



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# File 'lib/jets/application.rb', line 103

def load_environments_config
  env_file = "#{Jets.root}config/environments/#{Jets.env}.rb"
  if File.exist?(env_file)
    code = IO.read(env_file)
    instance_eval(code)
  end
end

#load_inflections ⇒ Object 



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# File 'lib/jets/application.rb', line 22

def load_inflections
  Jets::Inflections.load!
end

#load_routes ⇒ Object 



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# File 'lib/jets/application.rb', line 212

def load_routes
  routes_file = "#{Jets.root}config/routes.rb"
  require routes_file if File.exist?(routes_file)
end

#normalize_env_vars! ⇒ Object

It is pretty easy to attempt to set environment variables without the correct AWS Environment.Variables path struture. Auto-fix it for convenience.



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# File 'lib/jets/application.rb', line 182

def normalize_env_vars!
  environment = config.function.environment
  if environment and !environment.to_h.key?(:variables)
    config.function.environment = {
      variables: environment.to_h
    }
  end
end

#reload_configs! ⇒ Object

After the mimimal template gets build, we need to reload it for the full stack creation. This allows us to reference IAM policies configs that depend on the creation of the s3 bucket.



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# File 'lib/jets/application.rb', line 144

def reload_configs!
  load_configs
end

#routes ⇒ Object

Naming it routes because config/routes.rb requires

Jets.application.routes.draw do

for scaffolding to work.



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# File 'lib/jets/application.rb', line 208

def routes
  @router ||= Jets::Router.new
end

#set_dependent_configs! ⇒ Object 



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# File 'lib/jets/application.rb', line 123

def set_dependent_configs!
  # env_extra can be also be set with JETS_ENV_EXTRA.
  # JETS_ENV_EXTRA higher precedence than config.env_extra
  config.env_extra = ENV['JETS_ENV_EXTRA'] if ENV['JETS_ENV_EXTRA']
  # IE: With env_extra: project-dev-1
  #     Without env_extra: project-dev
  config.short_env = ENV_MAP[Jets.env.to_sym] || Jets.env
  # table_namespace does not have the env_extra, more common case desired.
  config.table_namespace = [config.project_name, config.short_env].compact.join('-')

  config.project_namespace = Jets.project_namespace
end

#set_iam_policy ⇒ Object 



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# File 'lib/jets/application.rb', line 136

def set_iam_policy
  config.iam_policy ||= self.class.default_iam_policy
  config.managed_policy_definitions ||= [] # default empty
end

#setup! ⇒ Object 



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# File 'lib/jets/application.rb', line 15

def setup!
  load_configs # load config object so following methods can use it
  load_inflections
  setup_auto_load_paths
  load_routes
end

#setup_auto_load_paths ⇒ Object 



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# File 'lib/jets/application.rb', line 58

def setup_auto_load_paths
  autoload_paths = config.autoload_paths + config.extra_autoload_paths
  autoload_paths = autoload_paths.uniq.map { |p| "#{Jets.root}#{p}" }
  # internal_autoload_paths are last
  autoload_paths += internal_autoload_paths
  ActiveSupport::Dependencies.autoload_paths += autoload_paths
end