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From: Fiona Ebner <f.ebner@proxmox.com>
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Subject: Re: [pve-devel] [PATCH docs] backup: warn that tar does not honor
 exclusion pattern with a trailing slash
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Am 31.05.24 um 12:07 schrieb Fiona Ebner:
> As reported in the community forum [0], for tar, an exclusion pattern
> with a trailing slash will not match a folder with that name. For
> rsync and proxmox-backup-client however, such a pattern will exclude
> a directory with that name, but not a file.
> 
> rsync is used for 'suspend' mode backup and tar is used for all
> non-PBS backups to create the archive. So currently, in the presence
> of an exclusion pattern with a trailing slash, there is inconsistency
> between different backup modes (because for 'suspend' mode, rsync will
> already do the exclusion too) as well as between PBS and non-PBS
> backups.
> 
> There doesn't seem to be a straight-forward way to align the behavior
> for tar with command-line options exactly. The trailing slash can't be
> removed from the pattern, because that would also match files.
> Matching with
>> some/pattern/*
>> some/pattern/.*
> rather than
>> some/pattern/
> gets pretty close, which was suggested by Dominik. Just the empty
> directory is still included.
> 
> In any case, modifying current behavior would be a breaking change, so
> actually aligning the exclusion (more closely) is better done in the
> next major release.
> 
> Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>

Ping (it seems the related docs patch here was not yet applied yet,
while the warning in pve-container was).


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