fix(gatsby): Add directory to GatsbyCacheLmdb

packages/gatsby/src/utils/__tests__/cache-lmdb.ts

@@ -13,7 +13,7 @@ describeWhenLMDB(`cache-lmdb`, () => {
 
   beforeAll(async () => {
     const { default: GatsbyCacheLmdb } = await import(`../cache-lmdb`)
-    cache = new GatsbyCacheLmdb({ name: `__test__` })
+    cache = new GatsbyCacheLmdb({ name: `__test__` }).init()
     const fileDir = path.join(
       process.cwd(),
       `.cache/caches-lmdb-${process.env.JEST_WORKER_ID}`

packages/gatsby/src/utils/cache-lmdb.ts

@@ -1,4 +1,5 @@
 import { open, RootDatabase, Database } from "lmdb-store"
+import fs from "fs-extra"
 import path from "path"
 
 // Since the regular GatsbyCache saves to "caches" this should be "caches-lmdb"
@@ -16,9 +17,17 @@ export default class GatsbyCacheLmdb {
   private static store
   private db: Database | undefined
   public readonly name: string
+  // Needed for plugins that want to write data to the cache directory
+  public readonly directory: string
 
   constructor({ name = `db` }: { name: string }) {
     this.name = name
+    this.directory = path.join(process.cwd(), `.cache/caches/${name}`)
+  }
+
+  init(): GatsbyCacheLmdb {
+    fs.ensureDirSync(this.directory)
+    return this
   }
 
   private static getStore(): RootDatabase {

packages/gatsby/src/utils/get-cache.ts

@@ -8,7 +8,7 @@ export const getCache = (name: string): GatsbyCache => {
   if (!cache) {
     if (isLmdbStore()) {
       const GatsbyCacheLmdb = require(`./cache-lmdb`).default
-      cache = new GatsbyCacheLmdb({ name }) as GatsbyCache
+      cache = new GatsbyCacheLmdb({ name }).init() as GatsbyCache
     } else {
       cache = new GatsbyCache({ name }).init()
     }