[Bug 10475] New: Delete based upon enclosing folder

[samba-bugs at samba.org]

https://bugzilla.samba.org/show_bug.cgi?id=10475

           Summary: Delete based upon enclosing folder
           Product: rsync
           Version: 3.1.0
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: core
        AssignedTo: wayned at samba.org
        ReportedBy: me at haravikk.com
         QAContact: rsync-qa at samba.org


I was happy to see the (fairly) recently added --delete-during, however I think
it could be taken a step further.

I'd like to propose a --delete-outside flag, this would behave exactly as
--delete-during does, however rather than postponing the deletions to the very
end, they are instead performed when the directory they belong to is closed.

For example, while scanning a directory /foo rsync descends into a directory
/foo/bar. Once inside it finds various files such as /foo/bar/a, /foo/bar/b
etc. and also discovers some deletions such as /foo/bar/1 and /foo/bar/2. When
it discovers these deletions they are queued up, as normal for --delete-during,
however, they are deleted immediately after processing of /foo/bar is complete.


The advantages to this behaviour is that features such as --fuzzy,
--partial-dir etc. will function normally as deletions don't occur early.
However, once the to-be-deleted files are no longer required, they can be
discarded. This removes the need for a backup to take place with enough free
space leftover for deleted files plus any new ones (plus any in-transit ones).
Basically instead of requiring enough free space for all to-be-deleted files,
it is limited to only such files that are in any single directory.


I'm not sure about a name for the flag, --delete-outside doesn't seem very
specific, maybe --delete-hierarchical? I'm not sure.

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