See also:
Suppose you want a reactive-based charm. Such a charm cannot be initialised with Charmcraft. However, it can be packed with Charmcraft. This document shows you how.
Introduced in Charmcraft 1.4.
The reactive way to write a charm represents an old standard. The recommended way to create a charm now is using Charmcraft and Ops.
To pack a reactive-based charm with Charmcraft, in the charm directory create a charmcraft.yaml file with the part definition for a reactive-based charm:
type: "charm"
bases:
- build-on:
- name: "ubuntu"
channel: "20.04"
run-on:
- name: "ubuntu"
channel: "20.04"
parts:
charm:
source: .
plugin: reactive
build-snaps: [charm]
Done. Now you can go ahead and pack your reactive-based charm with Charmcraft in the usual way using charmcraft pack.