How to use s4cmd to upload public objects to S3

s3cmd has a parameter that lets you set public read permissions to objects you upload.

By using s3cmd put --acl-public (...) or s3cmd put -P (...) you can upload files and set its permissions to public in one go.

I prefer to use s4cmd instead, but the documentation is confusing when it comes to setting permissions

--API-ACL=ACL         The canned ACL to apply to the object.
--API-GrantFullControl=GRANTFULLCONTROL
                      Gives the grantee READ, READ_ACP, and WRITE_ACP
                      permissions on the object.
--API-GrantReadACP=GRANTREADACP
                      Allows grantee to read the object ACL.
--API-GrantRead=GRANTREAD
                      Allows grantee to read the object data and its
                      metadata.
--API-GrantWriteACP=GRANTWRITEACP
                      Allows grantee to write the ACL for the applicable

So here’s the (very simple) solution:

$ s4cmd put --API-ACL=public-read (...)

Please mind you must have S3::PutObjectACL permissions to make this work.