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Symlink support for packager 

Summary:
I saw we have quite a few user requests for symlink support...

**Test plan (required)**

1. Create a symlink in `node_modules` (for instance use `npm link`)
2. Run `npm start`
3. Profit!

**Code formatting**

Look around. Match the style of the rest of the codebase. See also the simple [style guide](https://github.com/facebook/react-native/blob/master/CONTRIBUTING.md#style-guide).

For more info, see the ["Pull Requests" section of our "Contributing" guidelines](https://github.com/facebook/react-native/blob/master/CONTRIBUTING.md#pull-requests).
Closes https://github.com/facebook/react-native/pull/9009

Differential Revision: D3648828

Pulled By: matryoshcow

fbshipit-source-id: 99cf313bfa70324ca904fa6919ef112180974e9e
This commit is contained in:
Kureev Alexey 2016-08-01 04:37:34 -07:00 committed by Facebook Github Bot 9
parent f634a0fc23
commit 5cf7f040a5
2 changed files with 20 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
local-cli/server/findSymlinksPaths.js Normal file
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@ -0,0 +1,15 @@
const path = require('path');
const fs = require('fs');
module.exports = function findSymlinksPaths(lookupFolder) {
const timeStart = Date.now();
const folders = fs.readdirSync(lookupFolder);
const resolvedSymlinks = folders.map(folder => path.resolve(lookupFolder, folder))
.filter(folderPath => fs.lstatSync(folderPath).isSymbolicLink())
.map(symlink => path.resolve(process.cwd(), fs.readlinkSync(symlink)));
const timeEnd = Date.now();
console.log(`Scanning ${folders.length} folders for symlinks in ${lookupFolder} (${timeEnd - timeStart}ms)`);
return resolvedSymlinks;
};

6
local-cli/server/server.js
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@ -12,12 +12,16 @@ const chalk = require('chalk');
const formatBanner = require('./formatBanner');
const path = require('path');
const runServer = require('./runServer');
const findSymlinksPaths = require('./findSymlinksPaths');
/**
* Starts the React Native Packager Server.
*/
function server(argv, config, args) {
args.projectRoots = args.projectRoots.concat(args.root);
args.projectRoots = args.projectRoots.concat(
args.root,
findSymlinkPaths(path.resolve(process.cwd(), 'node_modules'))
);
console.log(formatBanner(
'Running packager on port ' + args.port + '.\n\n' +