fix: detect React Compiler in babel config files and package.json babel field

.changeset/fix-babel-compiler-detection-1448.md

@@ -0,0 +1,6 @@
+---
+"@react-doctor/core": patch
+"react-doctor": patch
+---
+
+Detect React Compiler in babel config files and package.json babel field. Previously, projects using babel-plugin-react-compiler in package.json babel config or babel config files would fail detection, causing React Compiler-gated rules like context-provider-value-from-unmemoized-local-literal to incorrectly fire. Fixes #1448.

packages/core/src/project-info/detectors.ts

@@ -2003,7 +2003,7 @@ const analyzeConfigNode = (
 };
 
 const hasCompilerInConfigFile = (filePath: string): boolean =>
-  analyzeConfigModuleExport(filePath, "default", false, 0, new Set<string>());
+  analyzeConfigModuleExport(filePath, "default", true, 0, new Set<string>());
 
 const hasCompilerInConfigFiles = (directory: string, filenames: string[]): boolean =>
   filenames.some((filename) => hasCompilerInConfigFile(path.join(directory, filename)));
@@ -2014,7 +2014,7 @@ const hasCompilerInPackageJsonConfig = (packageJson: PackageJson): boolean =>
     ts.parseJsonText("package.json", JSON.stringify(packageJson.babel)),
     "package.json#babel",
     "default",
-    false,
+    true,
     0,
     new Set<string>(),
   );

packages/core/tests/discover-project.test.ts

@@ -1238,6 +1238,23 @@ describe("discoverProject", () => {
     expect(discoverProject(projectDirectory).hasReactCompiler).toBe(true);
   });
 
+  it("detects React Compiler from package.json babel config", () => {
+    const projectDirectory = path.join(tempDirectory, "package-json-babel-react-compiler");
+    fs.mkdirSync(projectDirectory, { recursive: true });
+    fs.writeFileSync(
+      path.join(projectDirectory, "package.json"),
+      JSON.stringify({
+        name: "package-json-babel-react-compiler",
+        dependencies: { react: "^18.0.0" },
+        babel: {
+          plugins: ["babel-plugin-react-compiler"],
+        },
+      }),
+    );
+
+    expect(discoverProject(projectDirectory).hasReactCompiler).toBe(true);
+  });
+
   it("detects React Compiler from its compatibility runtime", () => {
     const projectDirectory = path.join(tempDirectory, "runtime-react-compiler");
     fs.mkdirSync(projectDirectory, { recursive: true });