Class: Terraspace::Compiler::Strategy::Tfvar::Layer

Inherits:
Object
  • Object
show all
Extended by:
Memoist
Includes:
Layering, Plugin::Expander::Friendly
Defined in:
lib/terraspace/compiler/strategy/tfvar/layer.rb

Instance Method Summary collapse

Methods included from Plugin::Expander::Friendly

#friendly_name

Methods included from Layering

#layers, #main_layers, #post_layers, #pre_layers

Constructor Details

#initialize(mod) ⇒ Layer

Returns a new instance of Layer.



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# File 'lib/terraspace/compiler/strategy/tfvar/layer.rb', line 36

def initialize(mod)
  @mod = mod
end

Instance Method Details

#full_layering ⇒ Object 



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# File 'lib/terraspace/compiler/strategy/tfvar/layer.rb', line 60

def full_layering
  # layers is defined in Terraspace::Layering module
  layers.inject([]) do |sum, layer|
    sum += layer_levels(layer) unless layer.nil?
    sum
  end
end

#full_paths(tfvars_dir) ⇒ Object 



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# File 'lib/terraspace/compiler/strategy/tfvar/layer.rb', line 47

def full_paths(tfvars_dir)
  layer_paths = full_layering.map do |layer|
    [
      "#{tfvars_dir}/#{layer}.tfvars",
      "#{tfvars_dir}/#{layer}.rb",
    ]
  end.flatten

  layer_paths.select do |path|
    File.exist?(path)
  end
end

#layer_levels(prefix = nil) ⇒ Object

adds prefix and to each layer pair that has base and Terraspace.env. IE:

"#{prefix}/base"
"#{prefix}/#{Terraspace.env}"



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# File 'lib/terraspace/compiler/strategy/tfvar/layer.rb', line 73

def layer_levels(prefix=nil)
  levels = ["base", Terraspace.env, @mod.instance].reject(&:blank?) # layer levels. @mod.instance can be nil
  env_levels = levels.map { |l| "#{Terraspace.env}/#{l}" } # env folder also
  levels = levels + env_levels
  levels.map! do |i|
    # base layer has prefix of '', reject with blank so it doesnt produce '//'
    [prefix, i].reject(&:blank?).join('/')
  end
  levels.unshift(prefix) unless prefix.blank? # IE: tfvars/us-west-2.tfvars
  levels
end

#paths ⇒ Object 



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# File 'lib/terraspace/compiler/strategy/tfvar/layer.rb', line 40

def paths
  project_paths = full_paths(project_tfvars_dir)
  stack_paths   = full_paths(stack_tfvars_dir)
  project_paths + stack_paths
end

#plugins ⇒ Object 



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# File 'lib/terraspace/compiler/strategy/tfvar/layer.rb', line 85

def plugins
  layers = []
  Terraspace::Plugin.layer_classes.each do |klass|
    layer = klass.new

    # region is high up because its simpler and the more common case is a single provider
    layers << layer.region

    namespace = friendly_name(layer.namespace)

    # namespace is a simple way keep different tfvars between different engineers on different accounts
    layers << namespace
    layers << "#{namespace}/#{layer.region}"

    # in case using multiple providers and one region
    layers << layer.provider
    layers << "#{layer.provider}/#{layer.region}" # also in case another provider has colliding regions

    # Most general layering
    layers << "#{layer.provider}/#{namespace}"
    layers << "#{layer.provider}/#{namespace}/#{layer.region}"
  end
  layers
end

#project_tfvars_dir ⇒ Object 



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# File 'lib/terraspace/compiler/strategy/tfvar/layer.rb', line 110

def project_tfvars_dir
  "#{Terraspace.root}/config/terraform/tfvars"
end

#stack_tfvars_dir ⇒ Object

seed dir takes higher precedence than the tfvars folder within the stack module. Example:

seed/tfvars/stacks/demo (folder must have *.tfvars or *.rb files)
app/stacks/demo/tfvars

This allows user to take over the tfvars embedded in the stack if they need to. Generally, putting tfvars in within the app/stacks/MOD/tfvars folder seems cleaner and easier to follow.

Will also consider app/modules/demo/tfvars. Though modules to be reuseable and stacks is where business logic should go.



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# File 'lib/terraspace/compiler/strategy/tfvar/layer.rb', line 125

def stack_tfvars_dir
  seed_dir = "#{Terraspace.root}/seed/tfvars/#{@mod.build_dir(disable_instance: true)}"
  mod_dir = "#{@mod.root}/tfvars"

  empty = Dir.glob("#{seed_dir}/*").empty?
  empty ? mod_dir : seed_dir
end