On Mon, 2008-07-07 at 12:49 +0200, Hendrik Maryns wrote: > I just read the thread > http://lists.samba.org/archive/rsync/2004-June/009678.html which > describes how --keep-dirlinks came to be. My use case is similar, but > I’d like a similar option for files as well. > > Setup: in my public_html I have some symlinks which I send over as > files, with -L (for various reasons: partly, because they are copies of > current work which is done elsewhere, or because several websites use > the same files, such as SSI footers). However, I also want to check > whether my colleague changed the files on the server, so first I do an > update. However, this replaces the links with the files themselves. > > My current usage is: > > # First look whether stuff changed on the other side (shouldn’t) > # rsync -rtKPuzb webserver:public_html/ /home/hendrik/public_html/Hendrik/ > # Then put changes from here. > rsync -rtkKLPzC --delete --delete-excluded > --exclude-from=/home/hendrik/.website-exclude > /home/hendrik/public_html/Hendrik/ webserver:public_html > > As you can see, I have the first line commented out, because it replaces > symlinks. I’d like something similar to --keep-dirlinks which follows > links on the receiver and compares the files linked to with those sent. > > Is this possible, or is it an RFE?
If files aren't supposed to change directly on the server, it seems to me that you could just drop the first command, add -uvv to the second command, watch for any "FILE is newer" messages, and handle those files manually. If files do change, consider using the two-way synchronizer Unison ( http://www.cis.upenn.edu/~bcpierce/unison/ ); it can update files through symlinks, but I don't think it has an equivalent to --delete-excluded. A --keep-links option may still be worth having in rsync. Updating a file atomically through a symlink is nontrivial (one has to readlink the chain of symlinks and combine the paths to find the ultimate location to rename to), but Unison implements this, so I don't see why rsync couldn't. Matt
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