Feature request: support Finch for container related workflows

[dreamorosi]

Describe your idea/feature/enhancement

Finch is an open-source container runtime client for MacOS that has been published by AWS and has an Open Source license. Finch's command-line syntax is not 100% compatible with that of docker but is quite close.

In anticipation of broader adoption of the tool by the community, SAM CLI could support it for all container-related workflows as a Docker replacement.

Proposal

At the moment there are certain workflows (i.e. sam invoke local) that require a docker daemon running on the host machine. It would be great if the SAM CLI could add support to finch either via flag or by transparently checking which one of the two engines is available and use that one (if both available default to one).

This won't require any updates to the SAM Spec.

Additional Details

Finch Launch Blog post: https://aws.amazon.com/blogs/opensource/introducing-finch-an-open-source-client-for-container-development/
Video: https://www.youtube.com/watch?v=S7JwFFZ-7_Q

[github-actions]

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[monirul]

Hi,
Unlink docker, Finch does not expose any unix socket. Since SAM CLI uses docker py which rely on the unix socket to communicate with docker engine, SAM CLI will not work with finch.