lua_to_yaml

README

goluamapper: Lua to YAML example

The example in main.go shows how a global variable defined in a Lua script can be converted into YAML

Here are the contents of an example Lua script, porter.lua:

local name = "cloud-communicator"
local version = "0.1.0"

local registryHost = "r.mysite.io"
local registryRepo = "trogdor-burninator/" .. name

local command = "/usr/local/bin/talk-to-the-cloud"
local provider = "aws"
local installArgs = {"--setup", "--provider", provider, "-f", provider .. "-setup.conf"}
local uninstallArgs = {"--teardown", "--provider", provider, "-f", provider .. "-teardown.conf"}

bundle = {
    name =  name,
    version = version,
    description = "this thing talks to the cloud. no joke.",
    invocationImage = registryHost .. "/" .. registryRepo .. ":" .. version,
    mixins = {"exec"},
    install = {
        {
            description = "Install " .. name,
            exec = {command = command, arguments = installArgs}
        }
    },
    uninstall = {
        {
            description = "Uninstall " .. name,
            exec = {command = command, arguments = uninstallArgs}
        }
    }
}

To run, clone the repo, cd to this directory and run:

go run . porter.lua bundle

The first arg ("porter.lua") is the path to the Lua script, and the second arg ("bundle") is the name of the global variable defined in the Lua script you want to use at your root object.

Resulting YAML (see porter.yaml):

name: cloud-communicator
version: 0.1.0
description: this thing talks to the cloud. no joke.
invocationimage: r.mysite.io/trogdor-burninator/cloud-communicator:0.1.0
mixins:
- exec
install:
- description: Install cloud-communicator
  exec:
    command: /usr/local/bin/talk-to-the-cloud
    arguments:
    - --setup
    - --provider
    - aws
    - -f
    - aws-setup.conf
uninstall:
- description: Uninstall cloud-communicator
  exec:
    command: /usr/local/bin/talk-to-the-cloud
    arguments:
    - --teardown
    - --provider
    - aws
    - -f
    - aws-teardown.con