[Bug 1479] New: --compare-dest suppresses output file if same timestamp present

[samba-bugs at samba.org]

https://bugzilla.samba.org/show_bug.cgi?id=1479

           Summary: --compare-dest suppresses output file if same timestamp
                    present
           Product: rsync
           Version: 2.5.7
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: P3
         Component: core
        AssignedTo: wayned at samba.org
        ReportedBy: sfink at reactrix.com
         QAContact: rsync-qa at samba.org


If I try to rsync a file that has an exact size & timestamp match in my
--compare-dest directory, then the file is not created in the output directory.
This behavior is as documented, but it is inconvenient for my application: I
repeatedly rsync a directory of files from a slow server, and I want to use
another directory as a cache on the destination machine without influencing the
correctness of the transfer. I don't want to use --link-dest because it changes
the semantics; it's too easy to mangle a file when it's hard linked. I am
working around the problem by messing up the timestamps of everything in my
compare-dest directory. I think this means that it can use the compare-dest as a
hash matching source, but will still create the output file in all cases.

So this bug is a feature request for a --copy-dest or
--create-the-output-file-anyway-please option. Or maybe it's just my way of
asking if I'm being an idiot.

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