From 9a9ea0b794fe1ea6ac34e94563a313acc2a42772 Mon Sep 17 00:00:00 2001
From: Mathieu Hofman <mathieu@agoric.com>
Date: Tue, 27 Dec 2022 00:13:55 +0000
Subject: [PATCH] feat(swingset-tools): [replay] Option to load snapshots
 through config

---
 .../SwingSet/misc-tools/replay-transcript.js  | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/packages/SwingSet/misc-tools/replay-transcript.js b/packages/SwingSet/misc-tools/replay-transcript.js
index ae0d6709c48..2893270f80c 100644
--- a/packages/SwingSet/misc-tools/replay-transcript.js
+++ b/packages/SwingSet/misc-tools/replay-transcript.js
@@ -141,6 +141,9 @@ const argv = yargsParser(process.argv.slice(2), {
     recordXsnapTrace: false,
     useXsnapDebug: false,
   },
+  config: {
+    config: true,
+  },
   configuration: {
     'duplicate-arguments-array': false,
     'flatten-duplicate-arrays': false,
@@ -978,6 +981,23 @@ async function replay(transcriptFile) {
             );
           }
         }
+
+        const loadSnapshots = [].concat(
+          argv.loadSnapshots?.[transcriptNum] || [],
+        );
+        for (const snapshotID of loadSnapshots) {
+          // eslint-disable-next-line no-await-in-loop
+          await loadSnapshot(
+            {
+              snapshotID,
+              vatID,
+            },
+            argv.keepWorkerExplicitLoad ||
+              (argv.keepWorkerHashDifference &&
+                (loadSnapshots.length > 1 ||
+                  !uniqueSnapshotIDs.includes(snapshotID))),
+          );
+        }
       }
     }
   } finally {