Add package 'jdupes'

[jbruchon]

Motivation: Motivation: Add a package for 'jdupes' as requested on Reddit.
Linked issues: N/A

Checklist

Builds with make all-supported but I do not have a Synology NAS to install them onto.

[Zaxim]

Is this request going to be merged soon? I'd love to have a jdupes package built in, as running it over a mounted share is agonizingly slow.

[jbruchon]

It's been nearly a year. Is this ever going to be merged?

[mneuron]

I crosscompiled the files on my DS918+ and it works flawless.
I recommend a merge!

[trlafleur]

would love to see this as a built-in function....

[jbruchon]

I'm disappointed that I put the effort into doing this and it still isn't merged, especially with users actively calling for a merge, an approval from what I assume is a project contributor, and a report of a confirmed working build on real hardware. I would greatly appreciate either a hasty merge or a clear explanation of the reason that the merge has been held back for 13 months.

[m4tt075]

Understood. The explanation is very simple: Lack of "management" resources. There is currently only one person (@ymartin59), who ensures quality, oversees merging and publications and his resources are limited too.

What I understand is, is that jdupes should be included as one of the tools in the SynoCli Files package. Up until recently, there was no proof of concept for those kind of SynoCli packages. However, the first one, SynoCli Net, has recently been finalized and merged. I'm willing to look into it and see whether I can draft the SynoCli Files one. @ymartin59 still would have to merge it eventually, but it might help getting the ball rolling...

[m4tt075]

@jbruchon OK. Here we go. Many thanks for your contribution! I'm looking into merging your work as part of the SynoCLI-file package. If you are still interested, please feel free to track any progress in issue #3250 and PR #3598.

For everyone, test-builds of the SynCLI-file package for all currently supported DSM5.2, 6.1 and 6.2 platforms are available here: https://github.com/m4tt075/spksrc/releases/tag/synoclifile-2
Please report any issues in #3250, not here.