Summary:
React dev tools have been broken since we moved to web worker but we had a gigantic upsell for them. This must be a very frustrating experience for people just starting to use react native to be told to use something and see that it doesn't work.
Removing that upsell until it works again
<img width="1090" alt="screen shot 2016-02-04 at 2 00 37 pm" src="https://cloud.githubusercontent.com/assets/197597/12831501/8eba3f4e-cb49-11e5-8bdc-84f902053321.png">
Closes https://github.com/facebook/react-native/pull/5768
Reviewed By: svcscm
Differential Revision: D2903017
Pulled By: vjeux
fb-gh-sync-id: 731c5fefbef1a5249d632fc62ca36813533f2639
Summary:
The JavaScript ecosystem doesn't have the notion of a built-in native module loader. Even Node is decoupled from its module loader. The module loader system is just JS that runs on top of the global `process` object which has all the built-in goodies.
Additionally there is no such thing as a global require. That is something unique to our providesModule system. In other module systems such as node, every require is contextual. Even registered npm names are localized by version.
The only global namespace that is accessible to the host environment is the global object. Normally module systems attaches itself onto the hooks provided by the host environment on the global object.
Currently, we have two forms of dispatch that reaches directly into the module system. executeJSCall which reaches directly into require. Everything now calls through the BatchedBridge module (except one RCTLog edge case that I will fix). I propose that the executors calls directly onto `BatchedBridge` through an instance on the global so that everything is guaranteed to go through it. It becomes the main communication hub.
I also propose that we drop the dynamic requires inside of MessageQueue/BatchBridge and instead have the modules register themselves with the bridge.
executeJSCall was originally modeled after the XHP equivalent. The XHP equivalent was designed that way because the act of doing the call was the thing that defined a dependency on the module from the page. However, that is not how React Native works.
The JS side is driving the dependencies by virtue of requiring new modules and frameworks and the existence of dependencies is driven by the JS side, so this design doesn't make as much sense.
The main driver for this is to be able to introduce a new module system like Prepack's module system. However, it also unlocks the possibility to do dead module elimination even in our current module system. It is currently not possible because we don't know which module might be called from native.
Since the module system now becomes decoupled we could publish all our providesModule modules as npm/CommonJS modules using a rewrite script. That's what React Core does.
That way people could use any CommonJS bundler such as Webpack, Closure Compiler, Rollup or some new innovation to create a JS bundle.
This diff expands the executeJSCalls to the BatchedBridge's three individual pieces to make them first class instead of being dynamic. This removes one layer of abstraction. Hopefully we can also remove more of the things that register themselves with the BatchedBridge (various EventEmitters) and instead have everything go through the public protocol. ReactMethod/RCT_EXPORT_METHOD.
public
Reviewed By: vjeux
Differential Revision: D2717535
fb-gh-sync-id: 70114f05483124f5ac5c4570422bb91a60a727f6
Summary: public
This is not only to put the files on a place where it makes more sense but also to allow to use ES6 features on them as `/packager` is not whitelisted on `babel`.
Reviewed By: mkonicek
Differential Revision: D2577267
fb-gh-sync-id: b69a17c0aad349a3eda987e33d1778d97a8e1549
Christopher Chedeau
Sebastian Markbage
Martín Bigio
