From 232e2db6741f7b3daa1b51cab7a341fbcb1a65ae Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Leosvel=20P=C3=A9rez=20Espinosa?=
 <leosvel.perez.espinosa@gmail.com>
Date: Thu, 25 Jul 2024 12:47:50 +0200
Subject: [PATCH] fix(js): generate exports without the filename for barrel
 files

---
 .../package-json/update-package-json.spec.ts  | 25 +++++++++++++++++--
 .../utils/package-json/update-package-json.ts |  7 +++++-
 2 files changed, 29 insertions(+), 3 deletions(-)

diff --git a/packages/js/src/utils/package-json/update-package-json.spec.ts b/packages/js/src/utils/package-json/update-package-json.spec.ts
index 2a9b8020615b0..56acde3b54455 100644
--- a/packages/js/src/utils/package-json/update-package-json.spec.ts
+++ b/packages/js/src/utils/package-json/update-package-json.spec.ts
@@ -200,6 +200,7 @@ describe('getUpdatedPackageJsonContent', () => {
               'proj/src/foo.ts',
               'proj/src/bar.ts',
               'proj/migrations.json',
+              'proj/feature/index.ts',
             ],
             outputPath: 'dist/proj',
             projectRoot: 'proj',
@@ -219,6 +220,8 @@ describe('getUpdatedPackageJsonContent', () => {
           './bar': './src/bar.js',
           './package.json': './package.json',
           './migrations.json': './migrations.json',
+          './feature': './feature/index.js',
+          './feature/index': './feature/index.js',
         },
       });
 
@@ -231,7 +234,11 @@ describe('getUpdatedPackageJsonContent', () => {
           },
           {
             main: 'proj/src/index.ts',
-            additionalEntryPoints: ['proj/src/foo.ts', 'proj/src/bar.ts'],
+            additionalEntryPoints: [
+              'proj/src/foo.ts',
+              'proj/src/bar.ts',
+              'proj/feature/index.ts',
+            ],
             outputPath: 'dist/proj',
             projectRoot: 'proj',
             format: ['esm'],
@@ -250,6 +257,8 @@ describe('getUpdatedPackageJsonContent', () => {
           './foo': './src/foo.js',
           './bar': './src/bar.js',
           './package.json': './package.json',
+          './feature': './feature/index.js',
+          './feature/index': './feature/index.js',
         },
       });
 
@@ -262,7 +271,11 @@ describe('getUpdatedPackageJsonContent', () => {
           },
           {
             main: 'proj/src/index.ts',
-            additionalEntryPoints: ['proj/src/foo.ts', 'proj/src/bar.ts'],
+            additionalEntryPoints: [
+              'proj/src/foo.ts',
+              'proj/src/bar.ts',
+              'proj/feature/index.ts',
+            ],
             outputPath: 'dist/proj',
             projectRoot: 'proj',
             format: ['cjs', 'esm'],
@@ -289,6 +302,14 @@ describe('getUpdatedPackageJsonContent', () => {
             import: './src/bar.js',
             default: './src/bar.cjs',
           },
+          './feature': {
+            import: './feature/index.js',
+            default: './feature/index.cjs',
+          },
+          './feature/index': {
+            import: './feature/index.js',
+            default: './feature/index.cjs',
+          },
           './package.json': './package.json',
         },
       });
diff --git a/packages/js/src/utils/package-json/update-package-json.ts b/packages/js/src/utils/package-json/update-package-json.ts
index 14366be160fb5..558d254963df4 100644
--- a/packages/js/src/utils/package-json/update-package-json.ts
+++ b/packages/js/src/utils/package-json/update-package-json.ts
@@ -261,8 +261,13 @@ export function getExports(
         options.projectRoot
       );
       const sourceFilePath = relativeDir + fileName;
-      const entryFilepath = sourceFilePath.replace(/^\.\/src\//, './');
+      const entryRelativeDir = relativeDir.replace(/^\.\/src\//, './');
+      const entryFilepath = entryRelativeDir + fileName;
       const isJsFile = jsRegex.test(fileExt);
+      if (isJsFile && fileName === 'index') {
+        const barrelEntry = entryRelativeDir.replace(/\/$/, '');
+        exports[barrelEntry] = sourceFilePath + options.fileExt;
+      }
       exports[isJsFile ? entryFilepath : entryFilepath + fileExt] =
         sourceFilePath + (isJsFile ? options.fileExt : fileExt);
     }