Scratch docker container

[aslafy-z]

Hello,
I would like to bundle some apps into a scratch container for it to work with multi-arch without having to publish multiple images.

I've tried

FROM scratch
ADD --chmod=755 https://cosmo.zip/pub/cosmos/v/3.9.2/bin/dash /bin/sh
ADD --chmod=755 https://cosmo.zip/pub/cosmos/v/3.9.2/bin/cp.ape /bin/cp
ENTRYPOINT ["/bin/sh"]

But it fails with

exec /bin/sh: exec format error

Any idea if it is possible?

[franalbani]

I guess those files are APE, so you need to wrap them with ape or use the binfmt_misc trick.

Try adding this:

ADD --chmod=755 https://cosmo.zip/pub/cosmos/v/3.9.2/bin/ape-x86_64.elf /bin/ape

And then wrap sh with it. But already we can see that it is for x86_64 so it won't achieve what you want.

I'm curious why you need docker just to bundle some binaries?

Is your idea that docker run thisimage will open a shell+utils in every platform?

Could we achieve the same using the zipos feature of APE binaries?