Terraform Javascript Provider

The JavaScript provider is used to perform javascript operations on data obtained during Terraform runs. For example a resource has a property that is a JSON formatted string, and you need the value from one of the nested properties you can use the JavaScript provider to parse the JSON string and return the value.

The provider uses otto to run JavaScript code and includes the underscore library.

Example Usage

variable "data" {
  type = "string"
  default = "{\"foo\": \"bar\"}"
}

provider "javascript" {}

resource "javascript_script" "s" {
  script = "context.foo = JSON.parse(context.json_string).foo"
  context = {
    json_string = "${var.data}"
  }
}

output val {
  value = "${javascript_script.s.context.foo}"
}

// val = "bar"

---

Argument Reference

The JavaScript provider currently takes no arguments

Resources

• javascript_script

javascript_script

Runs a piece of javascript code and returns an updated context object. The context object can be set with initial values an can be updated by the script by referencing it with context.*. The global variable operation is also set and available to the script. This allows for specific code to be run based on the operation type. Please note that all values in context are converted to strings due to the way terraform handles TypeMap values

Argument Reference

• script - (Required) The javascript to run
• context - (Optional) Optional TypeMap to make available in the script

Building

If the builds in the current release do not include the OS you require, you can download the source and create a custom distribution.

Requirements

• go tools installed
• docker installed
• source cloned to $GOPATH/src/github.com/bhoriuchi/terraform-provider-javascript

Steps

The following will set the build environment and use a docker instance to build the requested distribution packages.

1. cd to $GOPATH/src/github.com/bhoriuchi/terraform-provider-javascript
2. Set the environment variable GOX_OS_ARCH to the desired os/architecture combination. See gox usage
3. run make dist

Credits

• Build scripts and project outline copied from https://github.com/prudhvitella/terraform-provider-infoblox