Feature idea: vars

[teej]

There should be a way to pass in vars from the command line or a local vars file

[teej]

Vars

First pass proposal at vars behavior

YAML/CLI

titan.yml

vars:
  - name: foobar
    type: string
    default: some_default_value
    sensitive: true
databases:
  - name: "db_{{ var.foobar }}"

titan plan --config titan.yml --vars '{"foobar": "blimblam"}'
titan plan --config titan.yml --vars 'foobar: blimblam'

Python

from titan.blueprint import Blueprint
from titan import var

# Deferred style
db = Database(name=var.foobar)
# Interpolation style
db = Database(name="db_{{var.foobar}}")
Blueprint(resources=[db], vars={"foobar": "blimblam"})