s3util-rs 0.2.1

S3 utility commands (cp, mv, rm, etc.)
Documentation 
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use std::str::FromStr;

use aws_sdk_s3::types::ObjectCannedAcl;

const INVALID_ACL_VALUE: &str = "invalid acl value. valid choices: private | public-read | public-read-write | authenticated-read | aws-exec-read | bucket-owner-read | bucket-owner-full-control .";

pub fn parse_canned_acl(canned_acl: &str) -> Result<String, String> {
    #[allow(deprecated)]
    if matches!(
        ObjectCannedAcl::from_str(canned_acl).unwrap(),
        ObjectCannedAcl::Unknown(_)
    ) {
        return Err(INVALID_ACL_VALUE.to_string());
    }

    Ok(canned_acl.to_string())
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn accepts_known_canned_acls() {
        for acl in [
            "private",
            "public-read",
            "public-read-write",
            "authenticated-read",
            "aws-exec-read",
            "bucket-owner-read",
            "bucket-owner-full-control",
        ] {
            assert_eq!(parse_canned_acl(acl).unwrap(), acl);
        }
    }

    #[test]
    fn rejects_unknown_canned_acl() {
        let err = parse_canned_acl("not-a-real-acl").unwrap_err();
        assert!(err.contains("invalid acl value"));
    }
}