Runtime Modules

AsCode comes with a variety of modules available like http, math, encoding/json, etc. All this modules are available runtime through the load statement. This example shows the usage of this modules and some others.

Basic Module

The load statement expects at least two arguments; the first is the name of the module, and the same the symbol to extract to it. The runtime modules always define a symbol called equals to the last part of the module name.

load("encoding/base64", "base64")
load("http", "http")

This modules are very usuful to do basic operations such as encoding of strings, like in this case to base64 or to make HTTP requests.

dec = base64.encode("ascode is amazing")

msg = http.get("" % dec)


ascode is amazing

Advanced Modules

Also, AsCode has some more specif modules, like the docker module. The docker modules allow you to manipulate docker image names.

load("docker", "docker")

A docker image tag can be defined using semver, instead of using the infamous ‘latest’ tag, or fixing a particular version. This allows us to be up-to-date without breaking our deployment.

golang = docker.image("golang", "1.13.x")

We can use this in the definition of resources, allowing use to upgrade the version of our containers in every terraform apply

p = tf.provider("docker", "2.7.0")
container = p.resource.container("golang", image=golang.version(full=True))

version queries the docker repository and returns the correct tag.



resource "docker_container" "foo" {
  provider = docker.id_01E4KHW2RSW0FQM93KN5W70Y42
  image    = ""