From bedb65f35b35feda7b9511f45739ea4b8c9a1c5e Mon Sep 17 00:00:00 2001
From: Samantha Nguyen <contact@samanthanguyen.me>
Date: Wed, 5 Jun 2024 11:39:01 -0500
Subject: [PATCH] feat: add support for `compilerOptions.moduleDetection`

Introduced in TypeScript 4.7:
- https://www.typescriptlang.org/tsconfig/#moduleDetection
- https://www.typescriptlang.org/docs/handbook/release-notes/typescript-4-7.html#control-over-module-detection
---
 src/lib.rs                  | 17 +++++++++++++++++
 test/tsconfig.complete.json |  3 ++-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/lib.rs b/src/lib.rs
index 7ccae0a..99ed354 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -360,6 +360,7 @@ pub struct CompilerOptions {
     pub jsx: Option<Jsx>,
     pub lib: Option<Vec<Lib>>,
     pub module: Option<Module>,
+    pub module_detection: Option<ModuleDetectionMode>,
     pub no_emit: Option<bool>,
     pub out_dir: Option<String>,
     pub out_file: Option<String>,
@@ -453,6 +454,22 @@ pub struct CompilerOptions {
     pub watch_file: Option<String>,
 }
 
+/// Module detection mode
+///
+/// This setting controls how TypeScript determines whether a file is a script or a module.
+/// These choices include:
+///   - "auto" (default) - TypeScript will not only look for import and export statements, but it will also check whether the "type" field in a package.json is set to "module" when running with module: nodenext or node16, and check whether the current file is a JSX file when running under jsx: react-jsx.
+///   - "legacy" - The same behavior as 4.6 and prior, usings import and export statements to determine whether a file is a module.
+///   - "force" - Ensures that every non-declaration file is treated as a module.
+#[derive(Deserialize, Debug, PartialEq, Copy, Clone, Default)]
+#[serde(rename_all = "lowercase")]
+pub enum ModuleDetectionMode {
+	#[default]
+	Auto,
+	Legacy,
+	Force,
+}
+
 /// Module resolution mode
 ///
 /// Specify the module resolution strategy: 'node' (Node.js) or 'classic' (used in TypeScript before the release of 1.6). You probably won’t need to use classic in modern code.
diff --git a/test/tsconfig.complete.json b/test/tsconfig.complete.json
index 1d64282..2324676 100644
--- a/test/tsconfig.complete.json
+++ b/test/tsconfig.complete.json
@@ -82,6 +82,7 @@
     "removeComments": false, // Remove all comments except copy-right header comments beginning with //!
     "experimentalDecorators": true, // Enables experimental support for ES7 decorators.
     "emitDecoratorMetadata": true, // Enables experimental support for emitting type metadata for decorators.
+    "moduleDetection": "auto", // Controls how TypeScript determines whether a file is a script or a module.
 
     // Source map options
     "sourceMap": false, // Generates corresponding '.map' file.
@@ -103,4 +104,4 @@
     "noLib": false, // Do not include the default library file (lib.d.ts).
     "pretty": true, // Stylize errors and messages using color and context.
   }
-}
\ No newline at end of file
+}