chore(gatsby): migrate normalize-page-path to typescript (#22188)

Author: martijnjanssen

packages/gatsby/src/utils/normalize-page-path.js

@@ -0,0 +1,29 @@
+// This is a duplicate of the runtime util
+// file cache-dir/normalize-page-path.js
+// While still a duplicate, this one is
+// rewritten in typescript
+export function normalizePagePath(path: string): string {
+  if (path === undefined) {
+    return path
+  }
+  if (path === `/`) {
+    return `/`
+  }
+  if (path.charAt(path.length - 1) === `/`) {
+    return path.slice(0, -1)
+  }
+  return path
+}
+
+export function denormalizePagePath(path: string): string {
+  if (path === undefined) {
+    return path
+  }
+  if (path === `/`) {
+    return `/`
+  }
+  if (path.charAt(path.length - 1) !== `/`) {
+    return path + `/`
+  }
+  return path
+}

packages/gatsby/src/utils/normalize-page-path.ts

@@ -4,7 +4,7 @@ const path = require(`path`)
 const { store } = require(`../redux`)
 const fs = require(`fs`)
 const pageDataUtil = require(`../utils/page-data`)
-const normalizePagePath = require(`../utils/normalize-page-path`)
+import { normalizePagePath, denormalizePagePath } from "./normalize-page-path"
 const telemetry = require(`gatsby-telemetry`)
 const url = require(`url`)
 const { createHash } = require(`crypto`)
@@ -16,19 +16,6 @@ type QueryResult = {
 
 type QueryResultsMap = Map<string, QueryResult>
 
-const denormalize = path => {
-  if (path === undefined) {
-    return path
-  }
-  if (path === `/`) {
-    return `/`
-  }
-  if (path.charAt(path.length - 1) !== `/`) {
-    return path + `/`
-  }
-  return path
-}
-
 /**
  * Get cached page query result for given page path.
  * @param {string} pagePath Path to a page.
@@ -40,7 +27,7 @@ const getCachedPageData = async (
 ): QueryResult => {
   const { program, pages } = store.getState()
   const publicDir = path.join(program.directory, `public`)
-  if (pages.has(denormalize(pagePath)) || pages.has(pagePath)) {
+  if (pages.has(denormalizePagePath(pagePath)) || pages.has(pagePath)) {
     try {
       const pageData = await pageDataUtil.read({ publicDir }, pagePath)