Comment 0 for bug 1594794

snapcraft.yaml requires the version key, which is often redundant.

Plugins will often know the version number (such as encoded in Python setup.py files), but that is just for a single part.

Perhaps the version should optionally accept a part name instead of a version number, causing the version number of the part as reported by the plugin to be used for the snap (or an error raised if the plugin does not support it).

name: juju-deployer
summary: Juju deployment lifecycle management
description: Juju deployment lifecycle management
version: juju-deployer
apps:
    juju-deployer:
        command: juju-deployer
parts:
    juju-deployer:
        plugin: python3
        source: lp:juju-deployer