eslint-plugin-specs prepublish step

Summary:
#Changelog: [Internal] - This is an attempt to fix public publishing of eslint-plugin-specs. Currently, internal consumption of this package assumes access to `react-native-codegen/src` but for external usage, we leverage the published `react-native-codegen` which transforms files out to the `lib` folder vs. `src`.

For a similar-ish suit, this change is adding a prepublish step that will very basically update the references.

Reviewed By: mdvacca

Differential Revision: D32910080

fbshipit-source-id: f5e508090cbbf5097a848ddef3b721002a6c6277

packages/eslint-plugin-specs/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@react-native/eslint-plugin-specs",
-  "version": "0.0.1",
+  "version": "0.0.2",
   "description": "ESLint rules to validate NativeModule and Component Specs",
   "main": "index.js",
   "repository": {
@@ -8,6 +8,9 @@
     "url": "git@github.com:facebook/react-native.git",
     "directory": "packages/eslint-plugin-specs"
   },
+  "scripts": {
+    "prepublish": "node prepublish.js"
+  },
   "dependencies": {
     "@babel/core": "^7.14.0",
     "@babel/plugin-transform-flow-strip-types": "^7.0.0",

packages/eslint-plugin-specs/prepublish.js

@@ -0,0 +1,44 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+const fs = require('fs');
+
+/**
+ * script to prepare package for publish.
+ *
+ * Due to differences to how we consume internal packages, update a flag
+ */
+
+fs.readFile('./react-native-modules.js', 'utf8', function (readError, source) {
+  if (readError != null) {
+    return console.error(
+      'Failed to read react-native-modules.js for publish',
+      readError,
+    );
+  }
+
+  const result = source.replace(
+    'const PACKAGE_USAGE = false;',
+    'const PACKAGE_USAGE = true;',
+  );
+
+  fs.writeFile(
+    './react-native-modules.js',
+    result,
+    'utf8',
+    function (writeError) {
+      if (writeError != null) {
+        return console.error(
+          'Failed to update react-native-modules.js for publish',
+          writeError,
+        );
+      }
+    },
+  );
+});

packages/eslint-plugin-specs/react-native-modules.js

@@ -13,6 +13,8 @@
 const path = require('path');
 const withBabelRegister = require('./with-babel-register');
 
+// We run yarn prepublish before publishing package which will set this value to true
+const PACKAGE_USAGE = false;
 const ERRORS = {
   misnamedHasteModule(hasteModuleName) {
     return `Module ${hasteModuleName}: All files using TurboModuleRegistry must start with Native.`;
@@ -24,15 +26,28 @@ let RNParserUtils;
 
 function requireModuleParser() {
   if (RNModuleParser == null || RNParserUtils == null) {
-    const config = {
-      only: [/react-native-codegen\/src\//],
-      plugins: [require('@babel/plugin-transform-flow-strip-types').default],
-    };
+    // If using this externally, we leverage react-native-codegen as published form
+    if (!PACKAGE_USAGE) {
+      const config = {
+        only: [/react-native-codegen\/src\//],
+        plugins: [require('@babel/plugin-transform-flow-strip-types').default],
+      };
 
-    withBabelRegister(config, () => {
-      RNModuleParser = require('react-native-codegen/src/parsers/flow/modules');
-      RNParserUtils = require('react-native-codegen/src/parsers/flow/utils');
-    });
+      withBabelRegister(config, () => {
+        RNModuleParser = require('react-native-codegen/src/parsers/flow/modules');
+        RNParserUtils = require('react-native-codegen/src/parsers/flow/utils');
+      });
+    } else {
+      const config = {
+        only: [/react-native-codegen\/lib\//],
+        plugins: [require('@babel/plugin-transform-flow-strip-types').default],
+      };
+
+      withBabelRegister(config, () => {
+        RNModuleParser = require('react-native-codegen/lib/parsers/flow/modules');
+        RNParserUtils = require('react-native-codegen/lib/parsers/flow/utils');
+      });
+    }
   }
 
   return {