`publishDir` checksum method

[matthdsm]

New feature

Hi

I'd like to propose a new directive for publishdir.
It would be useful to have a checksum directive which generates a checksum for the files it writes out. This can be a boolean or perhaps a closure to further filter which files get checksummed.

Usage scenario

Checksums are useful in a scenario where data needs to be verified for transfer of archiving. Having a built-in would streamline this process.

I'm aware this could be easily done with a module, but it seems like this would be in place here too.

Suggest implementation

Add directive to publishDir to generate file.txt.md5 for file.txt

[apeltzer]

Maybe allowing both sha256sum and md5sum should be something to consider.

[matthdsm]

Could be a flag 👍🏻

[ewels]

x-ref #2491 which is relevant but different (here we are talking about generating checksums for outputs, that issue is about checking checksums for inputs).

#2676 is probably a duplicate of this issue, though it's a little unclear what the OP wanted there.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[ewels]

Could tie this into a plug-in that outputs a JSON of all publishDir files

[matthdsm]

Would be nice for testing!

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[ewels]

Still valid