"Mirroring" should prune files at the destination not found at source

[chipzoller]

There either needs to be a switch in the cp command to prune files at the destination not found at the source, or the existing behavior should be altered to more accurately reflect how "mirroring" is defined. When a directory is "mirrored" to a target directory, that means at the end of the operation, the two should be identical. With s5cmd using the -n -s -u switches does not produce this result and only adds files not found at the target.

[chipzoller]

When using the term "mirroring" I'm referring to the help for s5cmd cp:

09. Mirror a directory to target S3 prefix
     > s5cmd cp -n -s -u dir/ s3://bucket/target-prefix/

10. Mirror an S3 prefix to target S3 prefix
    > s5cmd cp -n -s -u s3://bucket/source-prefix/* s3://bucket/target-prefix/

[chipzoller]

Any comment on this or?

[igungor]

You're right. The wording of "mirror" is incorrect in this context. We should change it to something more accurate.

[chipzoller]

Alternatively, add an action "mirror" option that performs mirroring.

[igungor]

Mirroring (or sync) is requested before at #3.