prune ignore labels

[celogeek]

I'm trying vykar, and start using different labels as I'm saving many accounts and directories.

Here a short example of the issue:

config

repositories:
  - url: ./backup

encryption:
  passphrase: "secret"

retention:
  keep_daily: 7
  keep_weekly: 4

So I have 2 sources. One have the label "a" and the other the label "b"

When I run a backup

$ vykar backup a
Files: 1, Original: 2 B, Compressed: 37 B, Deduplicated: 37 B, Current: a
Snapshot created: 2fef13d7
  Source: a (label: a)
  Files: 1, Original: 2 B, Compressed: 37 B, Deduplicated: 37 B

$ vykar backup b
Files: 1, Original: 2 B, Compressed: 37 B, Deduplicated: 37 B, Current: b
Snapshot created: 94eb08da
  Source: b (label: b)
  Files: 1, Original: 2 B, Compressed: 37 B, Deduplicated: 37 B

$ vykar list
 ID        Date              Host             Label  Source  Files  Size
 2fef13d7  2026-05-10 16:23  MyHost  a      a           1  37 B
 94eb08da  2026-05-10 16:23  MyHost  b      b           1  37 B

But then if I run the prune command

$ vykar prune
Pruned 1 snapshots (kept 1), freed 2 chunks (168 B)

It only keep the last one no matter the label:

$ vykar list
 ID        Date              Host             Label  Source  Files  Size
 94eb08da  2026-05-10 16:23  MyHost  b      b           1  37 B

This setup (without sources), is what I would like to setup on a server.

I've got on this server vykar-server in append only, preventing any client to clean themself the repo,
And I've got a local client where I can run prune from time to time.

The issue, is that without the sources, the prune take all the labels as 1 source, and then apply the policy on it.

I've try to set a random sources like

sources:
  - path: z

And this time the prune preserve each label properly.

So I guess the tools has a bug when the sources is missing

[m3nu]

Thanks for the report! Looking into it.

[m3nu]

Confirmed bug, fixed in e5ff2a8.

Root cause: prune was branching on whether the local config had a sources: block. With sources it grouped snapshots by source_label and applied retention per-group; without sources it pooled every snapshot into one bucket and ignored labels entirely. That's why your dummy sources: [path: z] workaround restored the correct behavior — it just flipped the branch.

The label is intrinsic to each snapshot (recorded at backup time), so the local config's source list shouldn't affect the grouping. After the fix, prune always groups by source_label — your original setup (no sources:, central-server prune) now works as expected.

Will go out in the next release.