How to use '_multibuild' like spec when compiling the container

[arsenalpoll]

I found that when using '.spec' compilation, you can use _multibuild to define multiple compilations

Example: aa.spec bb.spec cc.spec

Now I have the same requirement for docker build, I want to use Dockerfile-a Dockerfile-b Dockerfile-c to multibuild like spec.

But I found that only one Dockerfile can be used, Dockerfile-a cannot be used, defining _multibuild has no effect

my example : https://build.opensuse.org/package/show/home:arsenalpoll/multibuild_container

[kkaempf]

• deleted comment - 🤦🏻‍♂️
  found: Mulitple spec files & _multibuild flavors open-build-service#8847 (comment)

[anmazzotti]

@arsenalpoll a bit late, but there's an example you may find useful: https://build.opensuse.org/package/show/isv:Rancher:Elemental:Dev/elemental-channel

The caveat is that all the Dockerfiles need to be extracted (in _service), and they must follow the Dockerfile.FLAVOR naming convention (from _multibuild).