rsync - Feb 2014 - [Bug 10448] New: Please include the --ignore-case patch by default

https://bugzilla.samba.org/show_bug.cgi?id=10448

           Summary: Please include the --ignore-case patch by default
           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'm not sure why --ignore-case isn't provided as a standard flag for
current
versions of rsync, but I think it should be included as it's incredibly
useful,
especially since Windows and OS X systems both default to case insensitive
while Linux tends to have case-insensitive file systems a lot more often, plus
it's possible for all free to to have any combination of sensitivity and
insensitivity which can be a nightmare to manage properly.

Anyway, I'd like to recommend that --ignore-case be provided by default in a
future release. I'd even go a step further and recommend providing a
soft-error
if rsync detects that it is syncing from a case sensitive system to a
case-insensitive one or vice-versa so that users are warned of any potential
issues with files or even directories that may end being overwritten, or copied
again and again.

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Wayne Davison <wayned at samba.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
            Version|3.1.0                       |3.1.1
            Summary|Please include the          |Finish implementing the
                   |--ignore-case patch by      |--ignore-case feature
                   |default                     |

--- Comment #1 from Wayne Davison <wayned at samba.org> 2014-02-24
19:20:44 UTC ---
The current patch is only a partial implementation of the feature, so it is not
yet ready for merging into the main code.

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--- Comment #2 from John Pierman <haqthat at gmail.com> ---
tested with 3.07 and 3.1 with --ignore-case patch applied

cd /tmp
mkdir -p a/b/c/d/e/f
mkdir -p A/b/C/D/e/F
add some files to a/b/c/d/e/f/
rsync -r --ignore-case a/ A/
>> creates b/c/d/e/f/<files>
Why is it not ignoring case?  I expect it to add all files in 'f' to
'F'

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--- Comment #3 from John Pierman <haqthat at gmail.com> ---
Because you're not running it on a case-ignoring filesystem.  That patch is
(sadly) only a partially effective set of changes that helps rsync to deal with
a filesystem that doesn't differentiate upper-/lower-case when naming files.
Rsync's main algorithm of probing for files by name (via stat) didn't
change,
and thus it doesn't try to find an alternate name for the same file if the
filesystem isn't conglomerating them together (and indeed, it totally fails
to
notice if the case on a filename has changed on the server compared to the
file's name on the receiver).

For a means of fixing this, I'm imaging having the code that is used for
--delete-during getting modified to notice changes in case and trying to fix
them (even if rsync isn't doing a delete-during run).  If that were done,
the
patch would probably then be in good enough shape to finally be included in the
main code.

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