Add preinstall script

Signed-off-by: Miki <miki@amazon.com>

.npmignore

@@ -14,7 +14,7 @@ packages/eslint-plugin
 types/
 
 # ignore everything in `scripts` except postinstall.js
-scripts/!(postinstall.js)
+scripts/!(postinstall.js|preinstall.js)
 
 src/**/*.!(scss)
 

package.json

@@ -36,6 +36,7 @@
     "yo-doc": "yo ./generator-oui/app/documentation.js",
     "release": "node ./scripts/release.js",
     "postinstall": "node ./scripts/postinstall.js",
+    "preinstall": "node ./scripts/preinstall.js",
     "version": "node ./scripts/update-changelog-version.js"
   },
   "repository": {

scripts/preinstall.js

@@ -0,0 +1,118 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+const { rmSync, readdirSync } = require('fs');
+const { join } = require('path');
+
+const { INIT_CWD, PWD = process.cwd() } = process.env;
+
+// Only run when installed as a dep
+if (!INIT_CWD?.startsWith?.(PWD)) {
+  const depsToKeep = [
+    '@types',
+    'csstype',
+    'is-buffer',
+    'is-plain-obj',
+    'mdast-util-definitions',
+    'mdast-util-to-hast',
+    'mdurl',
+    'react-focus-lock',
+    'react-focus-on',
+    'react-is',
+    'react-remove-scroll',
+    'react-remove-scroll-bar',
+    'react-style-singleton',
+    'rehype-react',
+    'remark-parse',
+    'remark-rehype',
+    'unified',
+    'unist-builder',
+    'unist-util-generated',
+    'unist-util-is',
+    'unist-util-position',
+    'unist-util-remove-position',
+    'unist-util-stringify-position',
+    'unist-util-visit',
+    'unist-util-visit-parents',
+    'use-callback-ref',
+    'use-sidecar',
+    'uuid',
+    'vfile-message',
+  ];
+
+  for (const name of readdirSync('node_modules')) {
+    if (!depsToKeep.includes(name)) rmSync(join('node_modules', name), { recursive: true, force: true });
+  }
+
+  const typesToKeep = [
+    'chroma-js',
+    'lodash',
+    'mdast',
+    'numeral',
+    'prismjs',
+    'prop-types',
+    'react',
+    'react-beautiful-dnd',
+    'react-dom',
+    'react-input-autosize',
+    'react-virtualized-auto-sizer',
+    'react-window',
+    'refractor',
+    'resize-observer-browser',
+    'scheduler',
+    'unist',
+    'vfile-message',
+  ];
+
+  for (const name of readdirSync('node_modules/@types')) {
+    if (!typesToKeep.includes(name)) rmSync(join('node_modules/@types', name), { recursive: true, force: true });
+  }
+
+  const toDeleteFromRoot = [
+    '.DS_Store',
+    '.cache-loader',
+    '.eslintcache',
+    '.git',
+    '.idea',
+    '.nvmrc',
+    '.vscode',
+    'docs',
+    'generator-oui',
+    'packages/eslint-plugin',
+    'packages/react-datepicker',
+    'reports',
+    'src-docs',
+    'test',
+    'tmp',
+    'tsconfig-builttypes.json',
+    'tsconfig.json',
+    'types',
+    'wiki',
+    'yarn-error.log',
+    'yarn.lock',
+  ];
+
+  for (const name of toDeleteFromRoot) {
+    rmSync(name, { recursive: true, force: true });
+  }
+
+  const scriptsToKeep = [
+    'postinstall.js',
+    'preinstall.js'
+  ];
+
+  for (const name of readdirSync('scripts')) {
+    if (!scriptsToKeep.includes(name)) rmSync(join('scripts', name), { recursive: true, force: true });
+  }
+
+  const deleteNonSCSS = (loc) => {
+    for (const entry of readdirSync(loc, { withFileTypes: true })) {
+      if (entry.isDirectory()) deleteNonSCSS(join(loc, entry.name));
+      else if (entry.isFile() && !entry.name.endsWith('.scss')) rmSync(join(loc, entry.name), { force: true });
+    }
+  };
+
+  deleteNonSCSS('src');
+}