Terrafied

A simple Ruby DSL for Terraform, somewhere in-between Terraframe and Terrafiddle

It avoids using method_missing and does not dynamically define the helper methods to make debugging easier.

Installation

Add this line to your application's Gemfile:

gem 'terrafied'

And then execute:

$ bundle

Or install it yourself as:

$ gem install terrafied

Usage

Once you import the module the provider and resource methods are available.

resource takes 3 arguments - a type, a name for the resource and a 'spec' hash.

provider takes 2 arguments - a type and a 'spec' hash

require 'terrafied'

resource "type", "name",
         foo: "one",
         bar: false

Outputs:

{
  "provider": {
  },
  "resource": {
    "type": {
      "name": {
        "foo": "one",
        "bar": false
      }
    }
  }
}

There are 2 helper methods (borrowed from terraframe) for looking up resource attributes.

output-of:

output_of('aws_elb', 'name', 'dns_name')
# => "${aws_elb.name.dns_name}"

id-of:

id_of('aws_elb', 'name')
# => "${aws_elb.name.id}"

If you call use_resource_shortcuts! then most aws resources have shortcut methods you can use.

Where possible I have defaulted the name parameter to be the resource name (and the description if you are forced to provide one), hope you find it useful.

require 'terrafied'
use_resource_shortcuts!

provider 'aws',
         region: 'eu-west-1',
         access_key: "BLAH",
         secret_key: "BLAGBLOOPBLAH"

VPC_NAME = 'example'
aws_vpc VPC_NAME,
        tags: { Name: VPC_NAME },
        cidr_block: '172.20.0.0/20'

aws_internet_gateway 'production',
                     vpc_id: id_of('aws_vpc', VPC_NAME)

Outputs:

{
  "provider": {
    "aws": {
      "region": "eu-west-1",
      "access_key": "BLAH",
      "secret_key": "BLAGBLOOPBLAH"
    }
  },
  "resource": {
    "aws_vpc": {
      "example": {
        "tags": {
          "Name": "example"
        },
        "cidr_block": "172.20.0.0/20"
      }
    },
    "aws_internet_gateway": {
      "production": {
        "vpc_id": "${aws_vpc.example.id}"
      }
    }
  }
}

You can add new aliases with add_resource_alias (Please add them in and do a pull request though)

require 'terrafied'

add_resource_alias 'new_resource_type'

new_resource_type 'name',
                  name: "Something",
                  foo: false

## Outputs
# {
#   "provider": {
#   },
#   "resource": {
#     "new_resource_type": {
#       "name": {
#         "name": "Something",
#         "foo": false
#       }
#     }
#   }
# }

Development

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/thattommyhall/terrafied. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

The gem is available as open source under the terms of the MIT License.