charmcraftst124

Caution

This project is deprecated. Use charmcraft >=3.3.0 instead

Pack multi-base charms (that include base Ubuntu 24.04) with a single charmcraft.yaml and git branch using the upcoming ST124 - Multi-base platforms in craft tools "shorthand notation" charmcraft.yaml syntax

Installation

Install pipx: https://pipx.pypa.io/stable/installation/

pipx install charmcraftst124

Usage

Step 1: Update charmcraft.yaml to supported syntax

Only ST124 "shorthand notation" syntax is supported

Example

platforms:
  ubuntu@22.04:amd64:
  ubuntu@22.04:arm64:
  ubuntu@24.04:amd64:
  ubuntu@24.04:arm64:

Under the platforms key, build-on and build-for syntax are not supported

The base and bases keys are not supported

Step 2: Pack platform

charmcraftst124 pack --platform ubuntu@22.04:amd64

See charmcraftst124 pack --help for more information

To pack multiple platforms, run charmcraftst124 pack once for each platform

Why is only "shorthand notation" syntax supported?

"Shorthand notation" is used when build-on is identical to build-for. (For example, "ubuntu@22.04:amd64" means build on Ubuntu 22.04 amd64 and build for Ubuntu 22.04 amd64.)

For charms that depend (directly or indirectly) on Python packages with C extensions (e.g. pyyaml), charmcraft will build wheels where the C extensions only work on build-on.

For example, if a charm is built with

platforms:
  foo:
    build-on: ubuntu@22.04:amd64
    build-for:
      - ubuntu@22.04:amd64
      - ubuntu@22.04:arm64

the wheels in the *.charm file will contain C extensions that only work on amd64, not arm64.

The vast majority of charms have at least one Python dependency with C extensions, so the vast majority of charms should use "shorthand notation".