Ignore emacs lockfiles (#20497)

Fixes: #15278 > Bug report > When using next dev with emacs, as you develop, emacs creates symbolic link files starting with .# as lock files. Next.js seems to attempt to load these but fails, spewing out errors constantly. Prevents dev server from crashing when emacs creates lockfiles tested with: - GNU Emacs 27.1 - OSX 11.1 - Node v15.4.0
vercel · Dec 29, 2020 · f2f9090a50f42bb894fc7ea3db48e1b125ea85fa · f2f9090
1 parent 3140e40
commit f2f9090a50f42bb894fc7ea3db48e1b125ea85fa
Unified Split

Showing with 10 additions and 1 deletion.

+1 −0 .gitignore

+9 −1 packages/next/build/webpack-config.ts
diff --git a/.gitignore b/.gitignore
@@ -25,6 +25,7 @@ test/**/next-env.d.ts
 
 # Editors
 **/.idea
+**/.#*
 
 # examples
 examples/**/out

diff --git a/packages/next/build/webpack-config.ts b/packages/next/build/webpack-config.ts
@@ -712,6 +712,8 @@ export default async function getBaseWebpackConfig(
     callback()
   }
 
+  const emacsLockfilePattern = '**/.#*'
+
   let webpackConfig: webpack.Configuration = {
     externals: !isServer
       ? // make sure importing "next" is handled gracefully for client
@@ -788,7 +790,13 @@ export default async function getBaseWebpackConfig(
       }
     },
     watchOptions: {
-      ignored: ['**/.git/**', '**/node_modules/**', '**/.next/**'],
+      ignored: [
+        '**/.git/**',
+        '**/node_modules/**',
+        '**/.next/**',
+        // can be removed after https://github.com/paulmillr/chokidar/issues/955 is released
+        emacsLockfilePattern,
+      ],
     },
     output: {
       ...(isWebpack5