[cli] very rough working stylex cli

package.json

@@ -41,8 +41,8 @@
     "@types/jest": "^29.5.11",
     "babel-plugin-syntax-hermes-parser": "^0.18.2",
     "benchmark": "^2.1.4",
-    "esbuild": "^0.19.12",
     "cross-env": "^7.0.3",
+    "esbuild": "^0.19.12",
     "eslint": "8.56.0",
     "eslint-config-prettier": "^9.1.0",
     "eslint-plugin-ft-flow": "^3.0.2",

packages/cli/package.json

@@ -2,7 +2,7 @@
   "name": "@stylexjs/cli",
   "version": "0.5.1",
   "description": "A cli to compile a folder with stylex",
-  "main": "./lib/index.js",
+  "main": "./src/index.js",
   "repository": "https://www.github.com/facebook/stylex",
   "license": "MIT",
   "scripts": {
@@ -23,7 +23,7 @@
     "@stylexjs/scripts": "0.5.1"
   },
   "bin": {
-    "stylex": "./lib/index.js"
+    "stylex": "./src/index.js"
   },
   "jest": {},
   "files": [

packages/cli/src/errors.js

@@ -0,0 +1,18 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow strict
+ */
+
+type Errors = $ReadOnly<{
+  dirNotFound: Error,
+}>;
+
+const errors: Errors = {
+  dirNotFound: new Error('Invalid Directory: Not Found'),
+};
+
+export default errors;

packages/cli/src/files.js

@@ -0,0 +1,57 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow strict
+ */
+
+// import type { Rule } from '@stylexjs/babel-plugin';
+
+import fs from 'fs';
+import path from 'path';
+import errors from './errors';
+
+// gets the directory for compiled styles (creates it if it doesn't exist)
+export function makeCompiledDir(compiledDir: string): void {
+  if (!fs.existsSync(compiledDir)) {
+    console.log('made dir', compiledDir);
+    fs.mkdirSync(compiledDir);
+  }
+}
+
+export function getInputDirectoryFiles(inputDir: string): Array<string> {
+  if (!fs.existsSync(inputDir)) {
+    throw errors.dirNotFound;
+  } else {
+    const files = fs.readdirSync(inputDir, { recursive: true });
+    return files.filter((file) => {
+      const maybeDir = path.join(inputDir, file);
+      return !isDir(maybeDir);
+    });
+  }
+}
+
+// takes in the compiled rules and writes them to a file at the top of the compiled directory
+export function writeCompiledCSS(filePath: string, compiledCSS: string): void {
+  fs.writeFileSync(filePath, compiledCSS);
+}
+
+export function writeCompiledJS(path: string, code: string): void {
+  makeDirExistRecursive(path);
+  fs.writeFileSync(path, code, {});
+}
+
+export function isDir(path: string): boolean {
+  return fs.lstatSync(path).isDirectory();
+}
+
+function makeDirExistRecursive(filePath: string): ?boolean {
+  const dirName = path.dirname(filePath);
+  if (fs.existsSync(dirName)) {
+    return true;
+  }
+  makeDirExistRecursive(dirName);
+  fs.mkdirSync(dirName);
+}