drone-test/.drone.yml

---
kind: pipeline
name: build-amd64

platform:
  os: linux
  arch: amd64

steps:
- name: build
  pull: always
  image: spritsail/docker-build
  settings:
    repo: thisisatestbuildamd64

- name: test
  pull: never
  image: thisisatestbuildamd64
  commands:
  - uname -m

- name: publish
  pull: always
  image: spritsail/docker-publish
  settings:
    from: thisisatestbuildamd64
    repo: frebib/drone-test
    tags:
    - latest-amd64
  environment:
    DOCKER_PASSWORD:
      from_secret: docker_password
    DOCKER_USERNAME:
      from_secret: docker_username

---
kind: pipeline
name: build-arm64

platform:
  os: linux
  arch: arm64

steps:
- name: build
  pull: always
  image: spritsail/docker-build
  settings:
    repo: thisisatestbuildarm64

- name: test
  pull: never
  image: thisisatestbuildarm64
  commands:
  - uname -m

- name: publish
  pull: always
  image: spritsail/docker-publish
  settings:
    from: thisisatestbuildarm64
    repo: frebib/drone-test
    tags:
    - latest-arm64
  environment:
    DOCKER_PASSWORD:
      from_secret: docker_password
    DOCKER_USERNAME:
      from_secret: docker_username

---
kind: pipeline
name: manifest

platform:
  os: linux
  # arch doesn't matter- whatever is free

clone:
  disable: true

steps:
- name: push-manifest
  pull: always
  image: plugins/manifest
  settings:
    platforms: linux/amd64,linux/arm64
    template: frebib/drone-test:latest-ARCH
    target: frebib/drone-test:latest
  when:
    status:
    - success
    - failure
  environment:
    DOCKER_PASSWORD:
      from_secret: docker_password
    DOCKER_USERNAME:
      from_secret: docker_username

depends_on:
- build-amd64
- build-arm64

---
kind: signature
hmac: b91ccfe31caf41e29e513ff66196177b7892722d376489d096589ab7ec6fe9f8

...