How to update ACL for all S3 objects in a folder with AWS CLI?

Question

As part of an automated process in CodeBuild I want to update Access Control List for all files in a given folder (or more specifically all objects with given prefix). How to do it in a single line of bash code?

Answer 1

The following one liner works perfectly

aws s3api list-objects --bucket $BUCKET_NAME$ --prefix $FOLDER_NAME$ --query "(Contents)[].[Key]" --output text | while read line ; do aws s3api put-object-acl --acl public-read --bucket $BUCKET_NAME$ --key $line ; done

it's not formatted as code, so that it's readable without scrolling!

Answer 2

You can use aws s3 cp

aws s3 cp --grants foo=bar=baz s3://mybucket/mydir s3://mybucket/mydir

Reference https://docs.aws.amazon.com/cli/latest/reference/s3/cp.html