[compiler:babel] Don't read config files when not running as part of

user's pipeline

When the user app has a babel.config file that is missing the compiler,
strange things happen as babel does some strange merging of options from
the user's config and in various callsites like in our eslint rule and
healthcheck script. To minimize odd behavior, we default to not reading
the user's babel.config

Fixes #29135

ghstack-source-id: d6fdc43c5c9107645f36718203873aa3f6228475
Pull Request resolved: #29211

compiler/packages/babel-plugin-react-compiler/src/Babel/RunReactCompilerBabelPlugin.ts

@@ -36,6 +36,8 @@ export function runBabelPluginReactCompiler(
       "babel-plugin-fbt-runtime",
     ],
     sourceType: "module",
+    configFile: false,
+    babelrc: false,
   });
   invariant(
     result?.code != null,

compiler/packages/eslint-plugin-react-compiler/src/rules/ReactCompilerRule.ts

@@ -143,6 +143,8 @@ const rule: Rule.RuleModule = {
             [BabelPluginReactCompiler, options],
           ],
           sourceType: "module",
+          configFile: false,
+          babelrc: false,
         });
       } catch (err) {
         if (isReactCompilerError(err) && Array.isArray(err.details)) {

compiler/packages/react-compiler-healthcheck/src/checks/reactCompiler.ts

@@ -85,6 +85,8 @@ function runBabelPluginReactCompiler(
     retainLines: true,
     plugins: [[BabelPluginReactCompiler, options]],
     sourceType: "module",
+    configFile: false,
+    babelrc: false,
   });
   if (result?.code == null) {
     throw new Error(

compiler/packages/snap/src/compiler.ts

@@ -333,6 +333,8 @@ export async function transformFixtureInput(
     sourceType: "module",
     ast: includeEvaluator,
     cloneInputAst: includeEvaluator,
+    configFile: false,
+    babelrc: false,
   });
   invariant(
     forgetResult?.code != null,
@@ -355,6 +357,8 @@ export async function transformFixtureInput(
       const result = transformFromAstSync(forgetResult.ast, forgetOutput, {
         presets,
         filename: virtualFilepath,
+        configFile: false,
+        babelrc: false,
       });
       if (result?.code == null) {
         return {
@@ -379,6 +383,8 @@ export async function transformFixtureInput(
       const result = transformFromAstSync(inputAst, input, {
         presets,
         filename: virtualFilepath,
+        configFile: false,
+        babelrc: false,
       });
 
       if (result?.code == null) {