bsb -watch being called from packager can cause some difficulties

[desmond-dsouza]

It looks like calling bsb -watch and the native packager go together here: https://github.com/react-community/reason-react-native-scripts/blob/master/src/util/packager.js#L72-L75

ReasonML's editor support has shifted towards a language-server which itself runs bsb whenever needed, automatically regenerating the js files and piping errors back to the specific editor (I use VScode and it does work this way). The two bsb's can apparently conflict on such things as the single .merlin file.

Would you be open to separating the bsb -watch? I would suggest it not be included, and the README steps can tell the user that bsb-(re)compiling is needed e.g. through their editor setup or by them manually keeping a bsb -watch running in terminal (ReasonML and Bucklescript users probably know about bsb -make-world -clean-world -w already).

[desmond-dsouza]

I've tried the following:

• npm start (which kicks off its bsb -w)
• kill -9 the_bsb_process_id
• Continue editing and saving in editor

The built-in language server does the right thing, which triggers the packager, which pushes the app update. So this should work.