It looks like PR#1126 may have broken reactive builds; metadata.yaml is overwritten?

[ajkavanagh]

Bug Description

It looks like PR#1126 may have broken charm-build (the reactive builders) metadata.yaml creation, as it seems to immediately overwrite it. This is with --channel=latest/edge (2.3.0.post16+gited81be8). At least I think that is what may be going on. I was testing latest/edge for the ability to build on lunar (23.04).

The offending line appears to be at https://github.com/canonical/charmcraft/blob/ed81be89193deede1c4266c4c369ed7ce7d6b0be/charmcraft/commands/build.py#L181

The issue is that the built charms' metadata should look like this:

"name": "mysql-innodb-cluster"
"summary": "MySQL InnoDB Cluster"
"maintainer": "OpenStack Charmers <openstack-charmers@lists.ubuntu.com>"
"description": |
  MySQL InnoDB Cluster Charm deploys and manages the lifecycle of a
  MySQL InnoDB Cluster.
"tags":
- "openstack"
- "databases"
"series":
- "focal"
- "jammy"
- "lunar"
"requires":
  "certificates":
    "interface": "tls-certificates"
"provides":
  "shared-db":
    "interface": "mysql-shared"
  "db-router":
    "interface": "mysql-router"
  "db-monitor":
    "interface": "mysql-monitor"
    "scope": "container"
  "prometheus":
    "interface": "http"
"peers":
  "coordinator":
    "interface": "coordinator"
  "cluster":
    "interface": "mysql-innodb-cluster"
"resources":
  "mysql-shell":
    "type": "file"
    "filename": "mysql-shell.snap"
    "description": |
      Snap for mysql-shell
  "mysqld-exporter":
    "type": "file"
    "filename": "mysqld-exporter.snap"
    "description": |
      snap for mysqld prometheus exporter
"subordinate": !!bool "false"

but actually looks like this:

name: mysql-innodb-cluster
summary: MySQL InnoDB Cluster
maintainer: OpenStack Charmers <openstack-charmers@lists.ubuntu.com>
description: |
  MySQL InnoDB Cluster Charm deploys and manages the lifecycle of a
  MySQL InnoDB Cluster.
tags:
- databases
subordinate: false
series:
- focal
- jammy
- lunar
provides:
  shared-db:
    interface: mysql-shared
  db-router:
    interface: mysql-router
  db-monitor:
    interface: mysql-monitor
    scope: container
  prometheus:
    interface: http
...

To Reproduce

# fetch any reactive charm source, with a charmcraft.yaml
charmcraft pack
unzip -p <charm> metadata.yaml

Environment

• Ubuntu 22.04
• charmcraft latest/edge

charmcraft.yaml

type: charm

parts:
  charm:
    plugin: reactive
    reactive-charm-build-arguments:
      - --binary-wheels-from-source
      - --verbose
    build-packages:
      - tox
      - git
      - python3-dev
      - libffi-dev
      - libmysqlclient-dev
      - pkg-config
    source: src/
    build-snaps:
      - charm/latest/edge
    build-environment:
      - CHARM_INTERFACES_DIR: $CRAFT_PROJECT_DIR/interfaces/
      - CHARM_LAYERS_DIR: $CRAFT_PROJECT_DIR/layers/

bases:
  - build-on:
      - name: ubuntu
        channel: "20.04"
        architectures: [amd64]
    run-on:
      - name: ubuntu
        channel: "20.04"
        architectures: [amd64]
  - build-on:
      - name: ubuntu
        channel: "20.04"
        architectures: [s390x]
    run-on:
      - name: ubuntu
        channel: "20.04"
        architectures: [s390x]
  - build-on:
      - name: ubuntu
        channel: "20.04"
        architectures: [ppc64el]
    run-on:
      - name: ubuntu
        channel: "20.04"
        architectures: [ppc64el]
  - build-on:
      - name: ubuntu
        channel: "20.04"
        architectures: [arm64]
    run-on:
      - name: ubuntu
        channel: "20.04"
        architectures: [arm64]
  - build-on:
      - name: ubuntu
        channel: "22.04"
        architectures: [amd64]
    run-on:
      - name: ubuntu
        channel: "22.04"
        architectures: [amd64]
  - build-on:
      - name: ubuntu
        channel: "22.04"
        architectures: [s390x]
    run-on:
      - name: ubuntu
        channel: "22.04"
        architectures: [s390x]
  - build-on:
      - name: ubuntu
        channel: "22.04"
        architectures: [ppc64el]
    run-on:
      - name: ubuntu
        channel: "22.04"
        architectures: [ppc64el]
  - build-on:
      - name: ubuntu
        channel: "22.04"
        architectures: [arm64]
    run-on:
      - name: ubuntu
        channel: "22.04"
        architectures: [arm64]
  - build-on:
      - name: ubuntu
        channel: "23.04"
        architectures: [amd64]
    run-on:
      - name: ubuntu
        channel: "23.04"
        architectures: [amd64]
  - build-on:
      - name: ubuntu
        channel: "23.04"
        architectures: [s390x]
    run-on:
      - name: ubuntu
        channel: "23.04"
        architectures: [s390x]
  - build-on:
      - name: ubuntu
        channel: "23.04"
        architectures: [ppc64el]
    run-on:
      - name: ubuntu
        channel: "23.04"
        architectures: [ppc64el]
  - build-on:
      - name: ubuntu
        channel: "23.04"
        architectures: [arm64]
    run-on:
      - name: ubuntu
        channel: "23.04"
        architectures: [arm64]

Relevant log output

Log file too long, sadly.

[syu-w]

Hi, do you able to give me the repo of that reactive charm?

[ajkavanagh]

Hi, do you able to give me the repo of that reactive charm?

Sure, yes. it's https://opendev.org/openstack/charm-mysql-innodb-cluster

However, I'm converting it to a binary reactive charm (with lunar support), which is where I hit the issue: https://review.opendev.org/c/openstack/charm-mysql-innodb-cluster/+/886634

However, it should be reproducible with any charmcraft charm that uses the reactive plugin (note the review 886634 uses the reactive plugin, the master branch doesn't (yet)). Thanks.

[ajkavanagh]

Thanks very much for the fix @syu-w !

[syu-w]

@ajkavanagh do you able to confirm it is working now?

[ajkavanagh]

@syu-w I can confirm that I've built the mysql-innodb-cluster charm with 2.3.0.post17+git35adadf and the metadata.yam, config.yaml and actions.yaml are all as per the generated output of charm build. Also the lunar (23.04) base also works. Thanks!