Selective “force” re-sync with syncthing

To synchronize files from one of my servers to my local machine I use syncthing with the server’s folder in “Send Only” mode. Usually this works flawlessly. As files are added to the directory, syncthing copies them to my local machine without a hitch. However, sometimes it doesn’t work, and the remote files will just never show up. In this case syncthing provides the “Override Changes” button, but this is usually not what I want to do. I don’t want to re-sync all of the files from master to my local machine, I just want to sync a single file, or folders worth of files.

In this case there’s a neat little trick you can do, which is obvious in hindsight but it took me a while to think of it: just update the mtimes. SSH onto the server and run something like:

$ find /path/to/folder/to/force/sync -type f -print0 | xargs -0 -n1 touch

This will go through every file in the folder we want to sync and update its mtime (using touch) to be the current time. Once syncthing re-scans the directory, it will see these updated mtimes and push the files down.

 
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