Summary:
`metro-bundler` v0.21 contains a rewritten bundling mechanism, with simplified logic and much faster rebuild times, called delta bundler. This release contains a couple of breaking changes:
* Now, when using a custom transformer, the list of additional babel plugins to apply are passed to the `transform()` method. These are used in non-dev mode for optimization purposes (Check 367a5f5db8 (diff-40653f0c822ac59a5af13d5b4ab31d84) to see how to handle them from the transformer).
* Now, when using a custom transformer outputting `rawMappings`, the transformer does not need to call the `compactMappings` method before returning (check d74685fd1d (diff-40653f0c822ac59a5af13d5b4ab31d84) for more info).
* We've removed support for two config parameters: `postProcessModules` and `postProcessBundleSourcemap`.
Reviewed By: davidaurelio
Differential Revision: D6186035
fbshipit-source-id: 242c5c2a954c6b9b6f339d345f888eaa44704579
Summary:
Prettier 1.7.0 has config file + pragma support so this works really well with the current prettier usage. Also added a prettier script to run it (taken mostly from the relay repo) and ran it which caused 1 files to change (probably wasn't updated when upgrading prettier to 1.7.0).
**Test plan**
Made sure flow still checked
Run 'yarn prettier', should format only files with `format` using the config in package.json.
Closes https://github.com/facebook/react-native/pull/16176
Differential Revision: D6256899
Pulled By: shergin
fbshipit-source-id: 646d90c15db8032b7b551da228d26d370babf125
Summary:
Adds the dependency to the Babel preset's package.json and enables the plugin only when `**` exists in a source file.
This is https://github.com/facebook/react-native/pull/12339 with merge conflicts resolved and putting the plugin behind a cheaper heuristic.
Closes https://github.com/facebook/react-native/pull/16191
Differential Revision: D6023857
Pulled By: hramos
fbshipit-source-id: 16f4a5f14780c27d2ef95fa7e8d8b611fa992aa0
Summary:
This is first PR from the series I am going to be sending as a result of fixing 0.50-stable test suite. This one removes `mockFS` dependency that has been causing failures on Node 6.x container.
Here's build before this change: https://circleci.com/gh/facebook/react-native/22529
Here's build after this change: https://circleci.com/gh/facebook/react-native/22538 (green)
Note that the CI may be still red as there are other PRs to be addressed. You can see this in the wild on 0.50.
Closes https://github.com/facebook/react-native/pull/16301
Differential Revision: D6031352
Pulled By: hramos
fbshipit-source-id: 5c97ae6c87864c094e29e5d8987521071c67f5bd
Summary:
local-cli now depends on the node-notifier package but it wasn't listed in package.json.
Closes https://github.com/facebook/react-native/pull/15905
Reviewed By: TheSavior
Differential Revision: D5814773
Pulled By: hramos
fbshipit-source-id: 3c397b0a21fea5009f35a69515e70a6d78ece375
Summary:
This change only affects tests run with Jest. `require('/images/image1.png')` will be replaced with
```
Object {
"testUri": "relative/path/to/images/image1.png",
}
```
in the Jest snapshot instead of always being 1 returned by RelativeImageStub. This change makes it possible to test conditional asset loading in components.
The problem with this change is that it will probably break a lot of existing snapshots, but that should be easily fixed when a project updates to a new version of React Native by running `jest -u` to update all snapshots.
A component can have conditional asset loading based on its props, this logic would be nice to test with Jest snapshots. This problem has been discussed in https://github.com/facebook/jest/issues/2838.
* **Who does this affect**: Everyone using `Image` in Jest snapshots
* **How to migrate**: Running `jest -u` will update the snapshots, the snapshots should be reviewed that they are correct.
* **Why make this breaking change**: It enables testing of conditional asset loading.
* **Severity (number of people affected x effort)**: Low.
Closes https://github.com/facebook/react-native/pull/13319
Reviewed By: rafeca
Differential Revision: D5708180
Pulled By: mjesun
fbshipit-source-id: 16ac42004d597db08545a21d4fffe95c5ee7e21f
Summary:
Several of the jest-related devDependencies are not directly used -- removing them from package.json.
Closes https://github.com/facebook/react-native/pull/15345
Differential Revision: D5553879
Pulled By: mjesun
fbshipit-source-id: 5ceacaa29bb7e80746a97345fb105ff19ccbf716
Summary:
There are several npm packages that are no longer used and do not show up when grepping the code base. Also the "async" dependency is used only in CI and should be moved to devDependencies.
Closes https://github.com/facebook/react-native/pull/13517
Differential Revision: D4963775
Pulled By: hramos
fbshipit-source-id: 8b6d2d67e65c8ba19c7f91ecfdd70ef731c7c46b
Summary:
Adding a Babel plugin that will analyze the file looking for any potential candidate to use `regenerator-runtime`, and if so, will inject dynamically the module. The module is injected per file, so we avoid polluting the global environment. The plugin is also able to inject the `require` call beforehand, so that the inliner can pick them and inline them.
The Babel plugin is part of `react-native-babel-preset`, so as long as you are using this preset you are safe. If not, you should include the specific transformer into your list of plugins, as `react-native-babel-preset/transforms/transform-regenerator-runtime-insertion.js`.
Reviewed By: davidaurelio
Differential Revision: D5388655
fbshipit-source-id: dc403f3d5e2d807529eb8569a85c45fec36a6a3e
Summary:
Many issues filed on Github are missing platform/toolchain version information. Others have different ways of writing it, and require the issue writer to look in multiple places for these versions.
Other CLI tools like Ionic have this function, and it's incredibly useful. Related to https://github.com/facebook/react-native/issues/14420
Run in terminal/command prompt `react-native info`
```
trevors-imac:AwesomeProject tabrindle$ react-native info
Versions:
React Native: 1000.0.0
OS: macOS Sierra
Node: v6.10.3
Yarn: 0.24.5
npm: 5.0.0
Xcode: Xcode 8.3.3 Build version 8E3004b
```
- CLA signed ✅
- Verify functionality + implementation
Closes https://github.com/facebook/react-native/pull/14428
Differential Revision: D5392446
Pulled By: hramos
fbshipit-source-id: 460079f3860c0af1e0b77bf26552c26032e974be
Summary: Move the returned type of `getPolyfills` from a standard `Array` to a read-only one, so that we make sure the array is not modified once created. Also, refactor the list of polyfills included by default to a generic, central file, then require it both from the CLI utils as well as the development server.
Reviewed By: jeanlauliac
Differential Revision: D5406553
fbshipit-source-id: ab980288bb1c625338de469da77dd6fc70bcedbc
Summary:
Adding a Babel plugin that will analyze the file looking for any potential candidate to use `regenerator-runtime`, and if so, will inject dynamically the module. The module is injected per file, so we avoid polluting the global environment. The plugin is also able to inject the `require` call beforehand, so that the inliner can pick them and inline them.
The Babel plugin is part of `react-native-babel-preset`, so as long as you are using this preset you are safe. If not, you should include the specific transformer into your list of plugins, as `react-native-babel-preset/transforms/transform-regenerator-runtime-insertion.js`.
Reviewed By: davidaurelio
Differential Revision: D5321193
fbshipit-source-id: fd4805b28c8a2b986842e23570a64003370d2067
Summary:
There were still some references to "packager/" that are no longer used since the `packager` directory has been deleted after moving to Metro. Cleaned up the ones that were doing nothing and updated the references that are still meaningful.
Closes https://github.com/facebook/react-native/pull/14881
Reviewed By: cpojer
Differential Revision: D5380731
Pulled By: javache
fbshipit-source-id: 1355268f48db47343d0d38fae2598b64c8c01475
Summary: Upgrade metro-bundler to v0.9.0. This version has no functional change. The only change is that the structure of the npm package reflects the structure of the source code.
Reviewed By: bestander
Differential Revision: D5315651
fbshipit-source-id: 3a69337106d4ccf708823c80d304941973360e8e
Summary: Upgrades `babel-preset-fbjs` to v2.1.4, which has better support for moving es2015 imports around.
Reviewed By: BYK
Differential Revision: D5287818
fbshipit-source-id: a2fa7b0267b913f126b37946cf24dd4c5146c245
Summary: Upgrades `babel-transform-react-native` to v2.0.0, which exposes a factory function. That way, the preset will include/exclude dev tools according to `process.env.NODE_ENV` even when that value changes over time.
Reviewed By: cpojer
Differential Revision: D5246801
fbshipit-source-id: 74a1e7e0fb1476750e1fe21ce4befd475907b415
Summary:
This diff cleans up some cruft and adds some features:
* It removes the usage of an env variable to control workers.
* It removes the lazy and handwavy calculation on how many workers to use for jest-haste-map. Jest itself uses the maximum amount of workers available and it has never been reported as an issue – especially since it is a one-time startup cost of about 3 seconds on a cold cache only.
* It adds a `--max-workers` flag to replace the env variable. This one is able to control both the number of workers for `jest-haste-map` as well as the transformers.
* It makes the transformers run in the parent process if 1 or fewer workers are are specified. This should help with debugging.
Once you approve this diff, I will publish a new version of metro to npm and update the version used in RN and remove the use of the env variable altogether: https://our.intern.facebook.com/intern/biggrep/?corpus=xplat&filename=&case=false&view=default&extre=&s=REACT_NATIVE_MAX_WORKERS&engine=apr_strmatch&context=false&filter[uninteresting]=false&filter[intern]=false&filter[test]=false&grep_regex=
Note: the process of adding a CLI option is really broken. Commander also has a weird API. We should consider building a better public API for Metro and then consider how to build a new CLI on top of it and simplify our internal integration. I really don't like how Metro is integrated across pieces of the RN cli in ways that is hard to manage. But that is a larger task for another time :)
Reviewed By: jeanlauliac
Differential Revision: D5217726
fbshipit-source-id: 74efddbb87755a9e744c816fbc62efa21f6a79bf
Summary: Moves type definitions for uglify and babel from React Native to Metro Bundler. We need it there.
Reviewed By: cpojer
Differential Revision: D5217795
fbshipit-source-id: 9ec349cd8caf077eaa3c6fa3d090ffd47893e967
Summary: This should fix the e2e test for OSS.
Reviewed By: cpojer
Differential Revision: D5164267
fbshipit-source-id: d858b4811f0eb80ca7363177f4f384b66af13994
Summary: This allows us to get the new fix for recovery on duplicate modules.
Reviewed By: cpojer
Differential Revision: D5128975
fbshipit-source-id: 5a2b60430bbca1806a97798c482af8522366e071
Summary: in order to prepare open sourcing React Native Packager, we have to move scripts specific to React Native to a directory that will continue to exist.
Reviewed By: javache
Differential Revision: D5112193
fbshipit-source-id: eac77d0d981aecef7ee52365a6856340420a5638
Summary:
The `env` option has been broken in Babel for a while (https://github.com/babel/babel/issues/4539), and will be deprecated (https://github.com/babel/babel/issues/5276).
I am changing this code to the way Babel < 6.10 interpreted the `env` option. This should fix the `__source` JSX transform which was applied in DEV in the past, but stopped getting applied because of the Babel bug.
I also changed the `filename` passed by Babel to be relative (currently, to `fbsource` but open to other options). This way DEV builds are still reproducible.
This still needs some help from davidaurelio to make the root location more foolproof. I'd also appreciate zertosh taking a look in case there's a better way to "anchor" the relative path. All I need is to for `react-third-party/react-devtools/react-devtools` and `babelTransformer.js` to agree on what the relative path base is.
Closes https://github.com/facebook/react-native/pull/13893
Reviewed By: gaearon
Differential Revision: D5035892
Pulled By: davidaurelio
fbshipit-source-id: 19ffeb867d7ed5928e9de05dcec9ba85bf961dd5
Summary: I found myself a few times wanting that transform, that makes it slightly simpler to have bound method. So I propose we add it. Not a big deal though. Note it also allows static properties with the same syntax, that is handy.
Reviewed By: davidaurelio
Differential Revision: D5051579
fbshipit-source-id: 7ebf7c709bf52a30a525550c1eda1a6a2f7b8e1e
Summary:
Hi,
Today I upgraded from RN 0.44 to 0.45.0-rc.0 and noticed I add to include either `CxxBridge` or `BatchedBridge` in the React subspecs in my Podfile to get my project to compile again (https://github.com/facebook/react-native/issues/13010).
Adding `BatchedBridge` works fine. However I wanted to try `CxxBridge` as described in 5aca739cc2 but couldn't do it since the required `third-party-podspecs` folder with `Folly.podspec`, `GLog.podspec` and `DoubleConversion.podspec` hadn't been included in the npm release.
So here is the fix for that.
It should be included in the next 0.45.0-rc release.
Let me know what you think.
Closes https://github.com/facebook/react-native/pull/13922
Differential Revision: D5051477
Pulled By: javache
fbshipit-source-id: e5c527f1ee9c84734d3e3a3d85ec3f1e5d648bef
Summary: That module is not used anymore, remove it and its dependency `joi`.
Reviewed By: cpojer
Differential Revision: D5028909
fbshipit-source-id: 90b9b156fbfe642cce93a530faf8ce91c5b848f5
Summary: This is not used by live code anymore.
Reviewed By: cpojer
Differential Revision: D5029114
fbshipit-source-id: 9ab9f6075407623debfe23bc121cc48ae8903917
Summary:
I suggest we grab our own version of worker-farm, since there are a few changes we'd like to do. There are two reasons for forking:
* the original project does not seem maintained anymore, with a PR remaining unanswered (https://github.com/rvagg/node-worker-farm/pull/42);
* we don't need to keep the level of genericity of the original project: for example, we don't need the option `maxConcurrentCallsPerWorker`, that we always keep to one.
Forking gives us opportunity to simplify the code for our use case. Later on we could reuse it for other projects such as `jest`.
A few things we'd like to do:
* remove special node options from the forks, such as `--inspect`, or even, allow adding special options (if you want to debug a worker specifically for example);
* allow us to pipe `stdout` and `stderr` instead of having transform spit stuff out to the parent process output;
* remove code managing `maxConcurrentCallsPerWorker` and clean up the code in general;
* add `flow` typing.
Reviewed By: davidaurelio
Differential Revision: D4993300
fbshipit-source-id: 10f0c2a18b010c2a8b2e2afebcb3aab3504d7923
Summary: This update carries with it Babylon 6.17.0 which adds support for flow type spread, and babel-eslint 7.2.3, which has a fix for working with flow type spreads. The other upgrades are to dedupe the babel deps.
Reviewed By: bestander
Differential Revision: D4922240
fbshipit-source-id: e42d708ad8de1084e31e9be5678d3a3a665fdfa1
Summary:
Immutable doesn't seem to be used in react-native anymore so I've removed it as a dependency.
Ensure that all tests pass.
Closes https://github.com/facebook/react-native/pull/13471
Differential Revision: D4877659
Pulled By: javache
fbshipit-source-id: f06996d6d0af73e5bd0108cec75370eec66ca038
Summary:
There's something wrong with the Linux binary in Flow v0.44.1. It doesn't work. Flow v0.44.2 fixes, however CircleCI may have cached Flow v0.44.1. Putting this PR up in case it's needed.
yarn install
yarn run flow
Closes https://github.com/facebook/react-native/pull/13549
Differential Revision: D4902838
Pulled By: gabelevi
fbshipit-source-id: 7f5223f7447dc0387955a94a0945915521a508c4
Summary:
ericvicenti Here is the latest updates and fixes for the container testing. Everything should be good to go now, the update for `inotify.max_user_watches` should fix the E2E test issues you were seeing locally.
The update to the packer prevents excessively large filename lengths due to the hash used in the name and splits them into directories instead. I was getting errors locally on the E2E because the hash filename was over 248 characters which was causing issues on the base image file system. It might not have appeared in circle due to another file system being used with different limits. I can separate it out into another PR if you want though.
* Turned jenkins instrumentation parallelism up to 3
* Disabled various instrumentation tests that seemed to have inconsistent results from
Jenkins by default
* Install google-chrome in the android base image so the chrome debug E2E test does not fail
* Turned back on E2E tests
cc normanjoyner
Closes https://github.com/facebook/react-native/pull/13417
Differential Revision: D4876137
Pulled By: ericvicenti
fbshipit-source-id: 31e033c1e34b02acb5484478414197ac9eb11f95
Summary:
I'm not sure why we rely on react-dom, so this is an attempt to remove it.
Closes https://github.com/facebook/react-native/pull/13425
Reviewed By: gaearon
Differential Revision: D4862718
Pulled By: ericvicenti
fbshipit-source-id: b9fb9937bff445311880fb923e0b5eb362ca291b
Summary:
This should resolve the following npm deprecation warning:
```
WARN deprecated node-uuid@1.4.7: Use uuid module instead
```
Existing tests should cover this already.
Closes https://github.com/facebook/react-native/pull/13194
Differential Revision: D4796723
Pulled By: javache
fbshipit-source-id: 2783f5d04c696b887de2ab2d32805e4661484a83
Summary:
> Explain the **motivation** for making this change. What existing problem does the pull request solve?
Of the three dependencies I have that rely on `glob`, react-native is the only one not on 7.x. If react-native can upgrade, then npm can deduplicate the glob dependency.
```console
$ npm ls glob
├─┬ eslint@3.13.1
│ └── glob@7.1.1
├─┬ jest@18.1.0
│ └─┬ jest-cli@18.1.0
│ └─┬ istanbul-api@1.1.0
│ ├─┬ fileset@2.0.3
│ │ └── glob@7.1.1
│ ├─┬ istanbul-lib-report@1.0.0-alpha.3
│ │ └─┬ rimraf@2.5.4
│ │ └── glob@7.1.1
│ └─┬ istanbul-lib-source-maps@1.1.0
│ └─┬ rimraf@2.5.4
│ └── glob@7.1.1
└─┬ react-native@0.39.2
├── glob@5.0.15
└─┬ rimraf@2.5.4
└── glob@7.1.1
```
**Test plan (required)**
> Demonstrate the code is solid. Example: The exact commands you ran and their output, screenshots / videos if the pull req
Closes https://github.com/facebook/react-native/pull/11893
Differential Revision: D4796721
Pulled By: javache
fbshipit-source-id: 6e7424dd731329f982c2f6c05b40dec8febf2e57
Summary:
fs-extra's first stable release is out since 1 of November.
I think its time to upgrade to 1.0.0. We've been running 1.0.0 locally and is having no problems with it.
**Test plan (required)**
Walked through the commits from 0.30 to 1.0.0 and no breaking changes has been made to the repository. https://github.com/jprichardson/node-fs-extra/compare/1.0.0...1.x
Closes https://github.com/facebook/react-native/pull/11542
Reviewed By: zertosh
Differential Revision: D4444576
Pulled By: hramos
fbshipit-source-id: 520311af8dc0911c026c08bdb74bec6572e7e17f
Summary:
Moves stack trace symbolication to a worker process.
The worker process is spawned laziliy, and is treated as an exclusive resource (requests are queued).
This helps keeping the server process responsive when symbolicating.
Reviewed By: cpojer
Differential Revision: D4602722
fbshipit-source-id: 5da97e53afd9a1ab981c5ba4b02a7d1d869dee71
Summary: Renaming since a file with the same name as a package confuses packager
Reviewed By: cpojer
Differential Revision: D4613215
fbshipit-source-id: 5cfae71d0bb1eef2675689b37a9b42596d25678d
Summary:
Created a containerized environment to run unit and integration tests for both javascript and android as well as a Jenkinsfile using the new 2.0 Pipeline syntax for integration into a Jenkins CI cluster.
Here is a quick summary of the changes:
* The android image is built from two separate dockerfiles. There is a base image that handles the heavy lifting of dependencies that are infrequently changed while the secondary image extends the base and allows for much quicker incremental builds on code updates.
* The javascript image is simple and is relatively quick to build, therefore there is no base image for any react specific javascript dependencies and it is all packaged in a single docker image.
* A new `scripts/docker` has been created including some javascript files and shell scripts to aid in the running of the tests
* The instrumentation test runner script can be passed various flags to control which tests run since the entire suite takes a significant amount of time to run synchronously
* Jen
Closes https://github.com/facebook/react-native/pull/11902
Differential Revision: D4609238
Pulled By: ericvicenti
fbshipit-source-id: a317f3ac3be898180b009254a9604ca7d579a8b9
Summary:
The first time I tried to commit this changeset, it was causing many new packages to be installed, because the dependency would depend on newer versions that what we have installed. So, I had made a diff so upgrade all the babel packages. Unfortunately this caused some problem as the newer versions of Babel are more strict on some syntaxes. Of course, these have to be addressed, but I don't want this changeset to be coupled with Babel upgrades and the issues that arise from it.
So instead, I decided to install the slightly older version of the async-to-generator module. At first I tried with just doing:
yarn add babel-plugin-transform-async-to-generator@6.16.0
But, `yarn` is stubborn: because this module depends on a caret version of `babel-helper-remap-async-to-generator`, it installs the very last version of it, that itself needs more recent versions of other Babel modules. So, instead, I add to install a slightly older version of the dependency manually, then then the plugin:
yarn add babel-helper-remap-async-to-generator@6.16.0
yarn add babel-plugin-transform-async-to-generator@6.16.0
This allows us to have a `yarn.lock` with only a minimal amount of changes, and uncouple this change from any Babel upgrades. Because we only have a few new modules, the `node_modules` folder also stays the same, 133M, and it gives us confidence this will not cause significant startup time regressions.
Reviewed By: cpojer
Differential Revision: D4578733
fbshipit-source-id: deb0f720b895b7196aaf432adec3e56f18663940
Summary:
allow-large-files
By using async/await the code is (1) less nested, (2) more compact and (3) more robust (no exceptions running away, and much less risks of forgetting to call the callback/resolve, or mistakenly calling it twice). I now tend to think we could switch to it for all the callsites that are not in a perf-critical path.
I switched from 'request' to 'node-fetch' because 'request' has an annoying callback with 2 arguments. So it's simpler to use an interface that's (1) already returning a Promise and (2) that is becoming standard.
This changeset was a way for me to start experiment with introducing async/await in packager codebase, and it looks pretty good so far.
Reviewed By: cpojer
Differential Revision: D4559167
fbshipit-source-id: 89a328c5766c2ba890e9d0e67a81a38dac6cfc73
Summary:
Syncs the latest changes from the React GitHub repo and takes a dependency on React 16 alpha.
I had to hide the type checker stuff behind `__DEV__` because they now throw in production.
Also disabled flow for findNodeHandle for now since we have some further clean up to do.
Reviewed By: spicyj
Differential Revision: D4526535
fbshipit-source-id: af5d282e75afbb293560b62fc72657461c24bdd1
Summary:
We should unmock React just because we do that elsewhere and tests work better
that way. I was trying to get React tests working in this repo but because
we do so many special things in the React Core repo I gave up.
These test run in the React Core repo already.
Reviewed By: spicyj, bvaughn
Differential Revision: D4541126
fbshipit-source-id: ffbb1b76aac910a976222db91b80b8839fcecc60
Summary:
This downloads, uncompresses, and configures folly and its
dependencies: boost, double-conversion, and glog.
Reviewed By: bestander
Differential Revision: D4434066
fbshipit-source-id: 8f9d18448ef139e450a8c45a64d6a066d731ac8f
Summary:
We stopped using Yeoman in https://github.com/facebook/react-native/pull/10786
I almost forgot to remove the now-unused dependency :)
**Test Plan**
- Published react-native to Sinopia
- Ran `react-native init MyApp`
- The app was generated correctly
- The app's node_modules folder doesn't contain Yeoman
Reviewed By: cpojer
Differential Revision: D4291619
fbshipit-source-id: 44c1ef8035fa2d8c40d4e8c505207245e1a95d3c
Summary:
This removes support for `require('image!…')`, which has been deprecated for a long time.
It is still possible to use images that are already bundled by the native app using the `nativeImageSource` module.
Check http://facebook.github.io/react-native/docs/images.html for detailed documentation.
Reviewed By: matryoshcow
Differential Revision: D4231208
fbshipit-source-id: 05ec4c1ca0fabdc3fbb652f8ad1acdf240a67955
Summary:
This is the manually imported version of https://github.com/facebook/react-native/pull/10786
This was mostly straigthforward by replacing the local-cli folder with the version I had in my local git checkout,
plus a few other files I listed with git diff --name-only.
Reviewed By: hramos
Differential Revision: D4201118
fbshipit-source-id: 4d0fb54b0edda9de1abba427958e420fd2ac105c
Summary:
* `module-deps` isn't unused anywhere - though it once was part of the packager.
* `jstransform` is used in `/website`, but that has its own `package.json` - which is meant to be installed when you're going to push a site update (see the README).
* `JSONStream`,`duplexer`, `opener` and `split` are used internally (that's why they're devDeps).
Reviewed By: davidaurelio
Differential Revision: D4147609
fbshipit-source-id: 75c5f3568a55c49cd2802165cd1f23aa84c07943
Summary:
This diff updates `lodash` so that it's optimally deduped, resulting in:
* reducing the packager's load time by ~300-400ms.
* reduces the size of `node_modules` from ~225MB to ~148MB.
* reduces the time to do a clean `yarn install` from 35s to 18s.
Lots of dependencies (including every `babel-*`) use `lodash@4`, by having `lodash@3` as a root dependency, each package had to have it's own copy of `lodash@4`. Now, there's only one.
The uses of `lodash` in RN are restricted to the CLI/packager, and the uses are pretty basic. The breaking APIs don't really seem to affect us https://github.com/lodash/lodash/wiki/Changelog#v400.
Reviewed By: bestander
Differential Revision: D4124836
fbshipit-source-id: 0849c385fcafe10b463e684fea47be6775982386