This is the Atom version of SyncFileYouWant plugin. It supports syncing and merging (with meld merge) files between folders.
To utilize this plugin, first set up the settings in your plugin setting by clicking "ctrl + ," or "cmd + ," if you are on Mac. Put the source and destination folder names in the settings pair.
SyncFileYouWant plugin will automatically take care of sub directories if they are of the same structure in source and destination.
Right click on the file you want to sync/merge. Choose Sync File to sync and Merge File with Meldmerge to merge.
In order to use merge functionality, you need to install meld merge first and put the meld.exe location into your setting.
Search and install it via atom's package manager.
MIT