Populating fields

DevX has some helpers to populate fields from environmental variables, files, or auto-generate values.

Config

stack.cue

package main

import (
    "stakpak.dev/devx/v1"
    "stakpak.dev/devx/v1/traits"
)

stack: v1.#Stack & {
    components: {
        cowsay: {
            traits.#Workload
            containers: default: {
                image: "docker/whalesay"
                command: ["cowsay"]
                args: ["Hello DevX!"]
                env: {
                    ENV:     string @guku(env=ENV)        // environment variable ENV=dev
                    VERSION: string @guku(file="VERSION") // VERSION file
                    ENV_GEN: string @guku(generate)       // autogenerated value
                }
            }
        }
    }
}

builder.cue

package main

import (
    "stakpak.dev/devx/v2alpha1"
    "stakpak.dev/devx/v2alpha1/environments"
)

builders: v2alpha1.#Environments & {
    dev: environments.#Compose
}

VERSION

v0.2.0

Build

ENV=dev devx build dev

Result

docker-compose.yml

version: "3"
volumes: {}
services:
  cowsay:
    image: docker/whalesay
    environment:
      ENV: dev
      VERSION: v0.2.0
      ENV_GEN: dummy
    depends_on: []
    command:
      - cowsay
      - Hello DevX!
    restart: always
    volumes: []