A command to wait for sync

I would like a command that blocks until the current folder is fully synchronized.

Why? I have a directory on my "local" machine with my data and my remote computer that I ssh into, which processes the data. Sometimes I make a small change to the data and want to process it. Let's say I process the data with make. Right now, if I make a small change locally and then immediately type in make, my remote server won't see the changes for several seconds, which means I don't know what I'm making.

So, instead of typing in make on my local server, I type in something like syncthing sync && make

• syncthing sync immediately fails if all of my remotes are not connected
• Then it makes sure that the synchronization is complete, which means that local and remote servers have detected and transferred all changes
• syncthing exits (no error code), which means that the files match the remote files.
• make is now sure to complete properly

There are no alternatives other than waiting, and there's no way to know how long to wait.

I write this like "syncthing sync" verifies that all files are synced the syncthing folder that $PWD is contained in, it could alternately be all syncthing folders that are "mounted" on the local machine.

Start with the proposed syncthing sync command and trace how the current folder, remote connections, and synchronization state are exposed. Clarify the folder scope and failure behavior described in the issue, then verify that the command waits for detected and transferred changes before make runs.