feat(gatsby): graphql engine (#33030)

* feat: graphql engine

* lint

* generate schema snapshot for v4 only

* fix stack-trace utils

* prevent schema snapshotting in workers

* address engine PR review comments

* revert require.resolve

Author: vladar

packages/gatsby-plugin-utils/src/types.ts

@@ -52,6 +52,10 @@ export interface IPluginRefObject {
   resolve: string
   options?: IPluginRefOptions
   parentDir?: string
+
+  subPluginPaths?: Array<string>
+  module?: any
+  modulePath?: string
 }
 
 export type PluginRef = string | IPluginRefObject

packages/gatsby-plugin-utils/src/utils/plugin-options-schema-joi-type.ts

@@ -1198,7 +1198,7 @@ interface Context {
 
 interface State {
   key?: string
-  path?: string
+  path: Array<string | number>
   parent?: any
   reference?: any
   ancestors?: any

packages/gatsby/cache-dir/query-engine/index.d.ts

@@ -0,0 +1,31 @@
+// IGatsbyPage, SystemPath and copied/inlined from redux/types so this file is self contained
+type SystemPath = string
+type Identifier = string
+
+export interface IGatsbyPage {
+  internalComponentName: string
+  path: string
+  matchPath: undefined | string
+  component: SystemPath
+  componentChunkName: string
+  isCreatedByStatefulCreatePages: boolean
+  context: Record<string, unknown>
+  updatedAt: number
+  // eslint-disable-next-line @typescript-eslint/naming-convention
+  pluginCreator___NODE: Identifier
+  pluginCreatorId: Identifier
+  componentPath: SystemPath
+  ownerNodeId: Identifier
+}
+
+// also inlined
+export interface IQueryResult {
+  errors?: Array<Error>
+  data?: any
+}
+
+export class GraphQLEngine {
+  constructor({ dbPath }: { dbPath: string })
+  runQuery(query: string, context: Record<string, any>): Promise<IQueryResult>
+  findPageByPath(pathName: string): IGatsbyPage | undefined
+}

packages/gatsby/package.json

@@ -24,6 +24,7 @@
     "@types/http-proxy": "^1.17.4",
     "@typescript-eslint/eslint-plugin": "^4.29.3",
     "@typescript-eslint/parser": "^4.29.3",
+    "@vercel/webpack-asset-relocator-loader": "^1.6.0",
     "address": "1.1.2",
     "anser": "^2.0.1",
     "autoprefixer": "^10.2.4",