Add additional debug logging to export

server/utils/ZipHelper.ts

@@ -4,6 +4,7 @@ import JSZip from "jszip";
 import { find } from "lodash";
 import tmp from "tmp";
 import { ValidationError } from "@server/errors";
+import Logger from "@server/logging/Logger";
 import { trace } from "@server/logging/tracing";
 import { deserializeFilename } from "./fs";
 
@@ -83,6 +84,7 @@ export default class ZipHelper {
    * @returns pathname of the temporary file where the zip was written to disk
    */
   public static async toTmpFile(zip: JSZip): Promise<string> {
+    Logger.debug("utils", "Creating tmp file…");
     return new Promise((resolve, reject) => {
       tmp.file(
         {
@@ -93,13 +95,38 @@ export default class ZipHelper {
           if (err) {
             return reject(err);
           }
+
+          let previousMetadata: JSZip.JSZipMetadata = {
+            percent: 0,
+            currentFile: null,
+          };
+
           zip
-            .generateNodeStream({
-              type: "nodebuffer",
-              streamFiles: true,
-            })
+            .generateNodeStream(
+              {
+                type: "nodebuffer",
+                streamFiles: true,
+              },
+              (metadata) => {
+                const percent = Math.round(metadata.percent);
+                if (percent !== previousMetadata.percent) {
+                  previousMetadata = {
+                    currentFile: metadata.currentFile,
+                    percent,
+                  };
+                  Logger.debug(
+                    "utils",
+                    `Writing zip file progress… %${percent}`,
+                    { currentFile: metadata.currentFile }
+                  );
+                }
+              }
+            )
             .pipe(fs.createWriteStream(path))
-            .on("finish", () => resolve(path))
+            .on("finish", () => {
+              Logger.debug("utils", "Writing zip complete", { path });
+              return resolve(path);
+            })
             .on("error", reject);
         }
       );