Fix resolving source package exports condition from self reference

Author: devongovett

crates/parcel-resolver/src/package_json.rs

@@ -375,7 +375,7 @@ impl PackageJson {
       }
 
       if let Ok(realpath) = path.canonicalize(&cache) {
-        let is_src = realpath != path && !realpath.in_node_modules();
+        let is_src = !realpath.in_node_modules();
         is_source = Some(is_src);
         is_src
       } else {

packages/utils/node-resolver-core/test/fixture/packages/self-source/compiled.js

@@ -0,0 +1,7 @@
+{
+  "name": "self-source",
+  "exports": {
+    "source": "./source.js",
+    "default": "./compiled.js"
+  }
+}

packages/utils/node-resolver-core/test/fixture/packages/self-source/package.json

@@ -2396,6 +2396,19 @@ describe('resolver', function () {
         path.join(rootDir, 'packages/self/bar.js'),
       );
     });
+
+    it('should support resolving package self with source field', async function () {
+      let resolved = await resolver.resolve({
+        env: NODE_INCLUDE_ENV,
+        filename: 'self-source',
+        specifierType: 'esm',
+        parent: path.join(rootDir, 'packages/self-source/foo.js'),
+      });
+      assert.equal(
+        resolved?.filePath,
+        path.join(rootDir, 'packages/self-source/source.js'),
+      );
+    });
   });
 
   describe('symlinks', function () {