Add repos uses flow syntax

repositories.json

@@ -59,6 +59,17 @@
       "*.xsl"
     ]
   },
+  {
+    "repository": "facebook/relay",
+    "commit": "1709304a30c36cc064656570d3e8146032a45d49",
+    "glob": [
+      "**/*.js"
+    ]
+  },
+  {
+    "repository": "facebook/stylex",
+    "commit": "14635baa4cdb79596306e5c1f0d689e3d9404f6d"
+  },
   {
     "repository": "formio/angular",
     "commit": "0a1b36e24b0571fee15b9578996b5121f32b46be"
@@ -130,6 +141,10 @@
     "repository": "prettier/prettier",
     "commit": "c9a0d5a8cecc76a10c819057e1c60df50d4bdd55"
   },
+  {
+    "repository": "react/metro",
+    "commit": "44505d8f8ca9c5e901c94287c60769a7cf5405f9"
+  },
   {
     "repository": "react/react",
     "commit": "80b1cab397764f83efb9828563a259c8052ded0c",

src/prepare-repository.ts

@@ -2,6 +2,7 @@ import fs from "node:fs/promises";
 import path from "node:path";
 import spawn from "nano-spawn";
 import { cloneRepository, type Repository } from "./repositories.ts";
+import setupRepository from "./setup-repository.ts";
 import {
   commitChanges,
   readFile,
@@ -43,6 +44,8 @@ export async function prepareRepository(
   await preparePrettierIgnoreFile(directory, repository);
   await spawn("git", ["init"], { cwd: directory });
 
+  await setupRepository(directory, repository);
+
   // There are junk files in `microsoft/vscode` can't commit
   const files = await removeFilesCannotAdd(directory);
   await Promise.all(

src/setup-repository.ts

@@ -0,0 +1,45 @@
+import assert from "node:assert";
+import fs from "node:fs/promises";
+import path from "node:path";
+import { type Repository } from "./repositories.ts";
+
+async function updateFile(
+  file: string,
+  process: (text: string) => Promise<string> | string,
+) {
+  let text = await fs.readFile(file, "utf8");
+  text = await process(text);
+  await fs.writeFile(file, text);
+}
+
+async function setupRepository(directory: string, repository: Repository) {
+  if (
+    repository.repository === "facebook/relay" ||
+    repository.repository === "react/metro"
+  ) {
+    await updateFile(path.join(directory, ".prettierrc.js"), (text) => {
+      text = text.replace("plugins,", "");
+      text = text.replaceAll("parser: 'hermes'", "parser: 'flow'");
+      return text;
+    });
+  } else if (repository.repository === "facebook/stylex") {
+    await updateFile(path.join(directory, "package.json"), (text) => {
+      const packageJson = JSON.parse(text);
+      const { prettier } = packageJson;
+
+      assert.ok(Array.isArray(prettier.plugins));
+      delete packageJson.prettier.plugins;
+
+      assert.ok(Array.isArray(prettier.overrides));
+      for (const { options } of prettier.overrides) {
+        if (options.parser === "hermes") {
+          options.parser = "flow";
+        }
+      }
+
+      return JSON.stringify(packageJson, undefined, 2);
+    });
+  }
+}
+
+export default setupRepository;