feat: support custom source root

Cargo.toml

@@ -36,7 +36,7 @@ quote              = { version = "1.0.35" }
 rayon              = { version = "1.8.1" }
 regex              = { version = "1.10.3" }
 rkyv               = { version = "0.7.43" }
-rspack_sources     = { version = "=0.2.7" }
+rspack_sources     = { version = "=0.2.9" }
 rustc-hash         = { version = "1.1.0" }
 schemars           = { version = "0.8.16" }
 serde              = { version = "1.0.196" }

crates/rspack_plugin_devtool/src/lib.rs

@@ -136,6 +136,7 @@ pub struct SourceMapDevToolPlugin {
   no_sources: bool,
   public_path: Option<String>,
   module: bool,
+  source_root: Option<String>,
   #[derivative(Debug = "ignore")]
   test: Option<TestFn>,
 }
@@ -178,6 +179,7 @@ impl SourceMapDevToolPlugin {
       no_sources: options.no_sources,
       public_path: options.public_path,
       module: options.module,
+      source_root: options.source_root,
       test: options.test,
     }
   }
@@ -301,7 +303,7 @@ impl Plugin for SourceMapDevToolPlugin {
             let mut has_name = used_names_set.contains(&source_name);
             if !has_name {
               used_names_set.insert(source_name.clone());
-              *source = source_name;
+              *source = Cow::from(source_name);
               continue;
             }
 
@@ -323,7 +325,7 @@ impl Plugin for SourceMapDevToolPlugin {
             has_name = used_names_set.contains(&source_name);
             if !has_name {
               used_names_set.insert(source_name.clone());
-              *source = source_name;
+              *source = Cow::from(source_name);
               continue;
             }
 
@@ -333,13 +335,16 @@ impl Plugin for SourceMapDevToolPlugin {
               has_name = used_names_set.contains(&source_name);
             }
             used_names_set.insert(source_name.clone());
-            *source = source_name;
+            *source = Cow::from(source_name);
           }
           if self.no_sources {
             for content in source_map.sources_content_mut() {
-              *content = String::default();
+              *content = Cow::from(String::default());
             }
           }
+          if let Some(source_root) = &self.source_root {
+            source_map.set_source_root(Some(source_root.clone()));
+          }
           let mut source_map_buffer = Vec::new();
           source_map
             .to_writer(&mut source_map_buffer)
@@ -791,11 +796,11 @@ impl EvalSourceMapDevToolPlugin {
     for source in map.sources_mut() {
       let resource_path = normalize_custom_filename(source);
       let resource_path = contextify(&compilation.options.context, resource_path);
-      *source = resource_path;
+      *source = Cow::from(resource_path);
     }
     if self.no_sources {
       for content in map.sources_content_mut() {
-        *content = String::default();
+        *content = Cow::from(String::default());
       }
     }
     let mut map_buffer = Vec::new();

packages/rspack/tests/configCases/plugins/source-map-dev-tool-plugin-source-root/index.js

@@ -0,0 +1,8 @@
+it("should generate the correct sourceRoot in SourceMap", function () {
+	const fs = require("fs");
+	const path = require("path");
+	const source = JSON.parse(fs.readFileSync(__filename + ".map", "utf-8"));
+	expect(source.sourceRoot).toContain(
+		path.resolve(__dirname, "../folder") + "/"
+	);
+});

packages/rspack/tests/configCases/plugins/source-map-dev-tool-plugin-source-root/webpack.config.js

@@ -0,0 +1,21 @@
+const path = require("path");
+const rspack = require("@rspack/core");
+
+/**
+ * @type {import("@rspack/core").Configuration}
+ */
+module.exports = {
+	node: {
+		__dirname: false,
+		__filename: false
+	},
+	output: {
+		filename: "[name].js"
+	},
+	plugins: [
+		new rspack.SourceMapDevToolPlugin({
+			filename: "[file].map",
+			sourceRoot: path.join(__dirname, "folder") + "/"
+		})
+	]
+};