Detect watch being executed from a middleware

[alendit]

A middleware might wish to implement a different behavaiour based on the information if the code is being run from an editor of as a part of a watch. Currently, I don't see any obvious way to solve an issue like nikitakit/hydrogen-python#25.

Am I missing something, or do the call to middleware.execute could use so optional parameter indicating that it's called from a watch?

[nikitakit]

I just wanted to jump in and provide some past context, although I'm no longer involved in new hydrogen development.

I had originally included this feature in the plugin API, but was instructed to remove it as part of code review (see #1179 and search for the callWatches flag). Of course, the boolean flag was just a first pass, and with greater effort it's possible to design a more general solution e.g.,

• Converting watches into a plugin and adding a "priority" argument when installing middleware, so that plugins could choose to run before any watches trigger and only see user-initiated requests
• Or, annotating each action with a more detailed description of its source (i.e. user-initiated, or the name of the middleware that triggered it)

Now that the plugin API is already public, there are also compatibility considerations involved when changing the API.