Summary:
We don't (yet) treat these the same as any other modules because we still have special resolution rules for them in the packager allowing the use of `providesModule`, but I believe this allows people to use npm react in their RN projects and not have duplicate copies of React. Fixesfacebook/react-native#2985.
This relies on fbjs 0.6, which includes `.flow` files alongside the `.js` files to allow them to be typechecked without additional configuration. This also uses react 0.14.5, which shims a couple of files (as `.native.js`) to avoid DOM-specific bits. Once we fix these in React, we will use the same code on web and native. Hopefully we can also remove the packager support I'm adding here for `.native.js`.
This diff is not the desired end state for us – ideally the packager would know nothing of react or fbjs, and we'll get there eventually by not relying on `providesModule` in order to load react and fbjs modules. (fbjs change posted here but not merged yet: https://github.com/facebook/fbjs/pull/84.)
This should also allow relay to work seamlessly with RN, but I haven't verified this.
public
Reviewed By: sebmarkbage
Differential Revision: D2786197
fb-gh-sync-id: ff50f28445e949edc9501f4b599df7970813870d
Summary: @public
We've been forgiving unresolved modules errors in the past but we've realized that doing so makes the codebase a bit unstable as people don't make sure to fix these errors. From now on we'll early fail and stop the packager when any module cannot be resolved (including assets)
Reviewed By: @amasad
Differential Revision: D2518076
fb-gh-sync-id: e170d95b905cc29afbe46e24b65425ddd887f77c
Summary: @public
This moves us from warnings on name collisions to errors. If the error happens in initialization it will fatal out.
However, if the error happens while working (after initialization) then I did my best to make it recoverable. The rational behind this is that if you're working and you're changing names, you may introduce a duplication while moving things around. It will suck if you have to restart the server every time you do that.
Reviewed By: @frantic
Differential Revision: D2493098
Summary: @public
Have a top-level debug namespace: `ReactNativePackager`
And add a couple of debugs in the transformer. This is ground work for adding a verbose option.
Reviewed By: @DmitrySoshnikov
Differential Revision: D2489960
Summary: @public
The issue of colliding haste modules have came up many times and have wasted countless engineering hours. This will start warning about it and will also start selecting modules at random so that people don't depend on undefined behavior.
Additionally, this surfaced an issue where with assets we may fatally throw if the directory doesn't exist. This is fixed by checking the existence of the directory before trying to match files in it.
Reviewed By: @jingc
Differential Revision: D2478480
