How do you use this?

[contentfree]

Please update your readme / docs to share how you're using this with buildx. Is it provided during buildx create?

[le0m]

Sorry for the veeeery long delay, I didn't see the issue until now 😞
I added some info on how to use this on the readme.

[contentfree]

How does one provide the info for ECR / docker login? I've done that locally but I'm still unable to successfully push builds up with buildx --push. (I get lots of error: failed to do request: Post "https://xxxx.dkr.ecr.us-east-1.amazonaws.com/v2/my/stuff/blobs/uploads/": EOF

[le0m]

Did you configure your machine to authenticate using aws cli, ie. running aws sts get-caller-identity in a terminal shows your information?

The repository of the aws-ecr-get-login-password binary has a little more information on which environment variables are used to infer authentication. You can also read more on AWS CLI docs.