Link shared libs to allow re-using them in both in public and fb-internal plugins

Summary:
Link plugin shared libraries to the "plugins/node_modules" dir so they can be used as peer dependencies by both public and fb-internal plugins.

```
plugins
- node_modules
-- fb_shared_lib (symlink pointing to "plugins/fb/fb_shared_lib")
-- public_shared_lib (symlink pointing to "plugins/public/public_shared_lib")
- fb
-- fb_shared_lib
-- fb_plugin (can now use both fb_shared_lib and public_shared_lib as peer dependencies)
- public
-- public_shared_lib
-- public_plugin (can now use both public_shared_lib and fb_shared_lib (optionally if it's an fb-internal repo) as peer dependencies)
```

Reviewed By: passy

Differential Revision: D27034936

fbshipit-source-id: 68ee5312060ff57649ae061dd7dd14f8beb6d4a1

desktop/plugins/package.json

@@ -7,7 +7,8 @@
     "url": "https://fb.workplace.com/groups/flippersupport/"
   },
   "devDependencies": {
-    "fs-extra": "^9.0.1"
+    "fs-extra": "^9.0.1",
+    "p-map": "^4.0.0"
   },
   "scripts": {
     "postinstall": "../ts-node ./postinstall.ts"

desktop/plugins/postinstall.ts

@@ -10,6 +10,7 @@
 import {execSync} from 'child_process';
 import path from 'path';
 import fs from 'fs-extra';
+import pmap from 'p-map';
 
 async function postinstall() {
   const publicPluginsDir = path.join(__dirname, 'public');
@@ -24,6 +25,42 @@ async function postinstall() {
       stdio: 'inherit',
     });
   }
+  const [publicPackages, fbPackages] = await Promise.all([
+    fs.readdir(publicPluginsDir),
+    fs.readdir(fbPluginsDir).catch(() => [] as string[]),
+  ]);
+  const packages = [
+    ...publicPackages.map((p) => path.join(publicPluginsDir, p)),
+    ...fbPackages.map((p) => path.join(fbPluginsDir, p)),
+  ];
+  const modulesDir = path.join(__dirname, 'node_modules');
+  await pmap(packages, async (packageDir) => {
+    const packageJsonPath = path.join(packageDir, 'package.json');
+    if (!(await fs.pathExists(packageJsonPath))) {
+      return;
+    }
+    const packageJson = await fs.readJson(
+      path.join(packageDir, 'package.json'),
+    );
+    if (
+      packageJson.keywords &&
+      packageJson.keywords.includes('flipper-plugin')
+    ) {
+      return;
+    }
+    const destPath = path.join(modulesDir, packageJson.name);
+    console.log(
+      `linking ${path.relative(__dirname, destPath)} to ${path.relative(
+        __dirname,
+        packageDir,
+      )}`,
+    );
+    if (await fs.pathExists(destPath)) {
+      return;
+    }
+    await fs.ensureDir(path.dirname(destPath));
+    await fs.symlink(packageDir, destPath, 'junction');
+  });
 }
 
 postinstall()

desktop/plugins/yarn.lock

@@ -2,11 +2,24 @@
 # yarn lockfile v1
 
 
+aggregate-error@^3.0.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/aggregate-error/-/aggregate-error-3.1.0.tgz#92670ff50f5359bdb7a3e0d40d0ec30c5737687a"
+  integrity sha512-4I7Td01quW/RpocfNayFdFVk1qSuoh0E7JrbRJ16nH01HhKFQ88INq9Sd+nd72zqRySlr9BmDA8xlEJ6vJMrYA==
+  dependencies:
+    clean-stack "^2.0.0"
+    indent-string "^4.0.0"
+
 at-least-node@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/at-least-node/-/at-least-node-1.0.0.tgz#602cd4b46e844ad4effc92a8011a3c46e0238dc2"
   integrity sha512-+q/t7Ekv1EDY2l6Gda6LLiX14rU9TV20Wa3ofeQmwPFZbOMo9DXrLbOjFaaclkXKWidIaopwAObQDqwWtGUjqg==
 
+clean-stack@^2.0.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/clean-stack/-/clean-stack-2.2.0.tgz#ee8472dbb129e727b31e8a10a427dee9dfe4008b"
+  integrity sha512-4diC9HaTE+KRAMWhDhrGOECgWZxoevMc5TlkObMqNSsVU62PYzXZ/SMTjzyGAFF1YusgxGcSWTEXBhp0CPwQ1A==
+
 fs-extra@^9.0.1:
   version "9.0.1"
   resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-9.0.1.tgz#910da0062437ba4c39fedd863f1675ccfefcb9fc"
@@ -22,6 +35,11 @@ graceful-fs@^4.1.6, graceful-fs@^4.2.0:
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.4.tgz#2256bde14d3632958c465ebc96dc467ca07a29fb"
   integrity sha512-WjKPNJF79dtJAVniUlGGWHYGz2jWxT6VhN/4m1NdkbZ2nOsEF+cI1Edgql5zCRhs/VsQYRvrXctxktVXZUkixw==
 
+indent-string@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/indent-string/-/indent-string-4.0.0.tgz#624f8f4497d619b2d9768531d58f4122854d7251"
+  integrity sha512-EdDDZu4A2OyIK7Lr/2zG+w5jmbuk1DVBnEwREQvBzspBJkCEbRa8GxU1lghYcaGJCnRWibjDXlq779X1/y5xwg==
+
 jsonfile@^6.0.1:
   version "6.0.1"
   resolved "https://registry.yarnpkg.com/jsonfile/-/jsonfile-6.0.1.tgz#98966cba214378c8c84b82e085907b40bf614179"
@@ -31,6 +49,13 @@ jsonfile@^6.0.1:
   optionalDependencies:
     graceful-fs "^4.1.6"
 
+p-map@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/p-map/-/p-map-4.0.0.tgz#bb2f95a5eda2ec168ec9274e06a747c3e2904d2b"
+  integrity sha512-/bjOqmgETBYB5BoEeGVea8dmvHb2m9GLy1E9W43yeyfP6QQCZGFNa+XRceJEuDB6zqr+gKpIAmlLebMpykw/MQ==
+  dependencies:
+    aggregate-error "^3.0.0"
+
 universalify@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/universalify/-/universalify-1.0.0.tgz#b61a1da173e8435b2fe3c67d29b9adf8594bd16d"