Milas Bowman b2cd089bae build: respect dependency order for classic builder
When using the "classic" (non-BuildKit) builder, ensure that
services are iterated in dependency order for a build so that
it's possible to guarantee the presence of a base image that's
been added as a dependency with `depends_on`. This is a very
common pattern when using base images with Compose.

A fix for BuildKit is blocked currently until we can rely on a
newer version of the engine (see docker/compose#9324)[^1].

[^1]: https://github.com/docker/compose/issues/9232#issuecomment-1060389808

Signed-off-by: Milas Bowman <milas.bowman@docker.com>
2022-06-22 16:24:30 -04:00

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services:
base:
image: base
build:
context: .
dockerfile: base.dockerfile
service:
depends_on:
- base
build:
context: .
dockerfile: service.dockerfile