chore(workflows): Fix merge conflicts with master

www/reference/.cache/commonjs/dev-loader.js

@@ -0,0 +1,197 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+
+exports.__esModule = true;
+exports.default = void 0;
+
+var _loader = require("./loader");
+
+var _findPath = require("./find-path");
+
+var _socketIo = _interopRequireDefault(require("./socketIo"));
+
+var _normalizePagePath = _interopRequireDefault(require("./normalize-page-path"));
+
+var _isEqual = _interopRequireDefault(require("lodash/isEqual"));
+
+// TODO move away from lodash
+const preferDefault = m => m && m.default || m;
+
+function mergePageEntry(cachedPage, newPageData) {
+  return { ...cachedPage,
+    payload: { ...cachedPage.payload,
+      json: newPageData.result,
+      page: { ...cachedPage.payload.page,
+        staticQueryResults: newPageData.staticQueryResults
+      }
+    }
+  };
+}
+
+class DevLoader extends _loader.BaseLoader {
+  constructor(asyncRequires, matchPaths) {
+    const loadComponent = chunkName => {
+      if (!this.asyncRequires.components[chunkName]) {
+        throw new Error(`We couldn't find the correct component chunk with the name "${chunkName}"`);
+      }
+
+      return this.asyncRequires.components[chunkName]().then(preferDefault) // loader will handle the case when component is error
+      .catch(err => err);
+    };
+
+    super(loadComponent, matchPaths);
+    this.asyncRequires = asyncRequires;
+    const socket = (0, _socketIo.default)();
+    this.notFoundPagePathsInCaches = new Set();
+
+    if (socket) {
+      socket.on(`message`, msg => {
+        if (msg.type === `staticQueryResult`) {
+          this.handleStaticQueryResultHotUpdate(msg);
+        } else if (msg.type === `pageQueryResult`) {
+          this.handlePageQueryResultHotUpdate(msg);
+        } else if (msg.type === `stalePageData`) {
+          this.handleStalePageDataMessage(msg);
+        }
+      });
+    } else if (process.env.NODE_ENV !== `test`) {
+      console.warn(`Could not get web socket`);
+    }
+  }
+
+  updateAsyncRequires(asyncRequires) {
+    this.asyncRequires = asyncRequires;
+  }
+
+  loadPage(pagePath) {
+    const realPath = (0, _findPath.findPath)(pagePath);
+    return super.loadPage(realPath).then(result => {
+      if (this.isPageNotFound(realPath)) {
+        this.notFoundPagePathsInCaches.add(realPath);
+      }
+
+      return result;
+    });
+  }
+
+  loadPageDataJson(rawPath) {
+    return super.loadPageDataJson(rawPath).then(data => {
+      // when we can't find a proper 404.html we fallback to dev-404-page
+      // we need to make sure to mark it as not found.
+      if (data.status === _loader.PageResourceStatus.Error && rawPath !== `/dev-404-page/`) {
+        console.error(`404 page could not be found. Checkout https://www.gatsbyjs.org/docs/how-to/adding-common-features/add-404-page/`);
+        return this.loadPageDataJson(`/dev-404-page/`).then(result => Object.assign({}, data, result));
+      }
+
+      return data;
+    });
+  }
+
+  doPrefetch(pagePath) {
+    if (process.env.GATSBY_EXPERIMENTAL_QUERY_ON_DEMAND) {
+      return Promise.resolve();
+    }
+
+    return super.doPrefetch(pagePath).then(result => result.payload);
+  }
+
+  handleStaticQueryResultHotUpdate(msg) {
+    const newResult = msg.payload.result;
+    const cacheKey = msg.payload.id;
+    const cachedResult = this.staticQueryDb[cacheKey];
+
+    if (!(0, _isEqual.default)(newResult, cachedResult)) {
+      this.staticQueryDb[cacheKey] = newResult;
+
+      ___emitter.emit(`staticQueryResult`, newResult);
+    }
+  }
+
+  handlePageQueryResultHotUpdate(msg) {
+    var _this$pageDataDb$get;
+
+    const newPageData = msg.payload.result;
+    const pageDataDbCacheKey = (0, _normalizePagePath.default)(msg.payload.id);
+    const cachedPageData = (_this$pageDataDb$get = this.pageDataDb.get(pageDataDbCacheKey)) === null || _this$pageDataDb$get === void 0 ? void 0 : _this$pageDataDb$get.payload;
+
+    if (!(0, _isEqual.default)(newPageData, cachedPageData)) {
+      // TODO: if this is update for current page and there are any new static queries added
+      // that are not yet cached, there is currently no trigger to fetch them (yikes)
+      // always update canonical key for pageDataDb
+      this.pageDataDb.set(pageDataDbCacheKey, {
+        pagePath: pageDataDbCacheKey,
+        payload: newPageData,
+        status: `success`
+      });
+      const cachedPage = this.pageDb.get(pageDataDbCacheKey);
+
+      if (cachedPage) {
+        this.pageDb.set(pageDataDbCacheKey, mergePageEntry(cachedPage, newPageData));
+      } // Additionally if those are query results for "/404.html"
+      // we have to update all paths user wanted to visit, but didn't have
+      // page for it, because we do store them under (normalized) path
+      // user wanted to visit
+
+
+      if (pageDataDbCacheKey === `/404.html`) {
+        this.notFoundPagePathsInCaches.forEach(notFoundPath => {
+          const previousPageDataEntry = this.pageDataDb.get(notFoundPath);
+
+          if (previousPageDataEntry) {
+            this.pageDataDb.set(notFoundPath, { ...previousPageDataEntry,
+              payload: newPageData
+            });
+          }
+
+          const previousPageEntry = this.pageDb.get(notFoundPath);
+
+          if (previousPageEntry) {
+            this.pageDb.set(notFoundPath, mergePageEntry(previousPageEntry, newPageData));
+          }
+        });
+      }
+
+      ___emitter.emit(`pageQueryResult`, newPageData);
+    }
+  }
+
+  handleStalePageDataMessage(msg) {
+    msg.payload.stalePageDataPaths.forEach(dirtyQueryId => {
+      if (dirtyQueryId === `/dev-404-page/` || dirtyQueryId === `/404.html`) {
+        // those pages are not on demand so skipping
+        return;
+      }
+
+      const normalizedId = (0, _normalizePagePath.default)(dirtyQueryId); // We can't just delete items in caches, because then
+      // using history.back() would show dev-404 page
+      // due to our special handling of it in root.js (loader.isPageNotFound check)
+      // so instead we mark it as stale and instruct loader's async methods
+      // to refetch resources if they are marked as stale
+
+      const cachedPageData = this.pageDataDb.get(normalizedId);
+
+      if (cachedPageData) {
+        // if we have page data in cache, mark it as stale
+        this.pageDataDb.set(normalizedId, { ...cachedPageData,
+          stale: true
+        });
+      }
+
+      const cachedPage = this.pageDb.get(normalizedId);
+
+      if (cachedPage) {
+        // if we have page data in cache, mark it as stale
+        this.pageDb.set(normalizedId, { ...cachedPage,
+          payload: { ...cachedPage.payload,
+            stale: true
+          }
+        });
+      }
+    });
+  }
+
+}
+
+var _default = DevLoader;
+exports.default = _default;