Flav/create fake doc script

front/scripts/upload_fake_data_source_document.ts

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+import { getDustDataSourcesBucket } from "@app/lib/file_storage";
+import { makeScript } from "@app/scripts/helpers";
+
+const fakeDocument = {
+  document_id: "not_found",
+  full_text: "",
+  sections: {
+    prefix: null,
+    content: null,
+    sections: [],
+  },
+};
+
+// Some data sources don't have a proper document in GCS, this script uploads a fake one.
+// Relocation workflows expect a document to be present in GCS for each data source document.
+makeScript(
+  {
+    path: {
+      type: "string",
+      demandOption: true,
+    },
+  },
+  async ({ path, execute }, logger) => {
+    const fileStorage = getDustDataSourcesBucket();
+
+    if (execute) {
+      await fileStorage
+        .file(path)
+        .save(Buffer.from(JSON.stringify(fakeDocument, null, 2)), {
+          contentType: "application/json",
+        });
+
+      logger.info(
+        `Successfully uploaded fake document to gs://${fileStorage.name}/${path}`
+      );
+    } else {
+      logger.info(
+        `About to upload fake document to gs://${fileStorage.name}/${path}`
+      );
+    }
+  }
+);