use createPage singleton in dev-404-page

closes gatsbyjs#3551
fabrictech · Jan 29, 2018 · a03310a · a03310a
1 parent a72c87e
commit a03310a
Showing 1 changed file with 11 additions and 5 deletions.
diff --git a/packages/gatsby/src/internal-plugins/dev-404-page/gatsby-node.js b/packages/gatsby/src/internal-plugins/dev-404-page/gatsby-node.js
@@ -1,18 +1,24 @@
 const path = require(`path`)
 const fs = require(`fs-extra`)
 
+let createdPage = false
+
 exports.createPages = async ({ store, boundActionCreators }) => {
   if (process.env.NODE_ENV !== `production`) {
     const { program } = store.getState()
     const { createPage } = boundActionCreators
     const currentPath = path.join(__dirname, `./raw_dev-404-page.js`)
     const newPath = path.join(program.directory, `.cache`, `dev-404-page.js`)
 
-    await fs.copy(currentPath, newPath)
+    if (!createdPage) {
+      createdPage = true
+
+      await fs.copy(currentPath, newPath)
 
-    createPage({
-      component: newPath,
-      path: `/dev-404-page/`,
-    })
+      createPage({
+        component: newPath,
+        path: `/dev-404-page/`,
+      })
+    }
   }
 }