Class: Stacco::Template

Inherits:
Object
  • Object
show all
Defined in:
lib/stacco/template.rb

Direct Known Subclasses

Base

Defined Under Namespace

Classes: Base, ColonPath, ConcatenatedPath, Mapping, Old, Path, Resource, StackVar, Type, Var

Constant Summary collapse

AttachmentTypes = 
{
  Set[Type[:ec2, :vpc], Type[:ec2, :internet_gateway]] => Type[:ec2, :vpc_gateway_attachment],
}

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Template

Returns a new instance of Template.



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# File 'lib/stacco/template.rb', line 28

def initialize
  @parameters = []
  @resources = []
end

Instance Method Details

#attach(resource_a, resource_b, opts = {}) ⇒ Object 



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# File 'lib/stacco/template.rb', line 122

def attach(resource_a, resource_b, opts = {})
end

#export_for_json(o, is_key = false) ⇒ Object 



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# File 'lib/stacco/template.rb', line 163

def export_for_json(o, is_key = false)
  case o
  when Numeric
    o.to_s
  when TrueClass, FalseClass
    o.to_s
  when NilClass
    raise ArgumentError, o
  when Var
    if is_key
      o.to_s
    else
      {"Ref" => o.to_s}
    end
  when Symbol
    ConcatenatedPath[o].to_s
  when Path
    o.to_s
  when Array
    o.map{ |el| export_for_json(el) }
  when Hash
    nh = {}
    o.each{ |k, v| nh[ export_for_json(k, true) ] = export_for_json(v) }
    nh
  when Regexp
    o.source
  else
    o
  end
end

#mapping(name, hsh) ⇒ Object 



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# File 'lib/stacco/template.rb', line 118

def mapping(name, hsh)
  @mappings.push [name, hsh]
end

#parameter(name, type, opts = {}) ⇒ Object 



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# File 'lib/stacco/template.rb', line 108

def parameter(name, type, opts = {})
  @parameters.push [name, type, opts]
end

#render ⇒ Object 



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# File 'lib/stacco/template.rb', line 125

def render
  tpl = {AWSTemplateFormatVersion: "2010-09-09"}
  tpl[:description] = "Stacco stack"

  tpl[:Mappings] = {}

  @mappings.each do |(name, hsh)|
    name = [name] if name.kind_of?(String) or name.kind_of?(Symbol)
    tpl[:Mappings][Mapping[*name]] = hsh
  end

  tpl[:Parameters] = {}

  @parameters.each do |(name, type, args)|
    name = [name] if name.kind_of?(String) or name.kind_of?(Symbol)
    constraints = {}
    args.merge(type: type.camelize).each do |k,v|
      constraints[k.camelize] = v
    end

    tpl[:Parameters][name] = constraints
  end

  tpl[:Resources] = {}

  @resources.each do |(name, type, args)|
    name = [name] if name.kind_of?(String) or name.kind_of?(Symbol)
    properties = {}
    args.each do |k,v|
      properties[k.camelize] = v
    end

    tpl[:Resources][name] = {"Type" => type, "DependsOn" => [], "Properties" => properties}
  end

  tpl
end

#resource(type, opts = {}) ⇒ Object 



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# File 'lib/stacco/template.rb', line 112

def resource(type, opts = {})
  name = type.resource(opts.delete(:name))
  @resources.push [name, type, opts]
  name
end

#to_json(opts = {}) ⇒ Object 



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# File 'lib/stacco/template.rb', line 194

def to_json(opts = {})
  self.export_for_json(self.render).to_json
end

#udscript(roles, vars) ⇒ Object 



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# File 'lib/stacco/template.rb', line 33

def udscript(roles, vars)
  roles = roles.map{ |role| role.intern }

  unless roles.include? :backend
    vars = vars.dup
    vars.delete 'wallet_data'
  end

  lns = []
  lns.concat(vars.map do |k, v|
    var_val = v.include?("\0") ? Base64.encode64(v) : v
    "export #{k.to_s.upcase}=#{Shellwords.escape(var_val)}\n"
  end)
  lns.concat Stacco::Resources::CloudInit::CommonScript
  roles.each{ |role| lns.concat Stacco::Resources::CloudInit::RoleScripts[role] }
  lns
end