A Restore logs restored <old> <new> for each pane

A script holding serials from before a Restore could not find its panes: the
replacement numbers them afresh. The dump now keeps each pane's serial (0 in
older dumps), and the replacement's log says `restored <old> <new>` for each
after its `restore <path>`.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 6 insertions, 1 deletions

diff --git a/src/ninep/events.zig b/src/ninep/events.zig
index 1c66c18f..0e489be7 100644
--- a/src/ninep/events.zig
+++ b/src/ninep/events.zig
@@ -934,8 +934,13 @@ test "a Dump written and a Restore made are in the log, with their files" {
         const log = try freezeLog(core);
         defer core.gpa.free(log.bytes);
         var want: [64]u8 = undefined;
-        try testing.expect(std.mem.endsWith(u8, log.bytes, try std.fmt.bufPrint(&want, "{s} /tmp/pardes.dump.zon\n", .{what})));
+        try testing.expect(std.mem.indexOf(u8, log.bytes, try std.fmt.bufPrint(&want, "{s} /tmp/pardes.dump.zon\n", .{what})) != null);
     }
+    // The replacement's last says which serial each pane had.
+    const log = try freezeLog(restored);
+    defer restored.gpa.free(log.bytes);
+    var want: [64]u8 = undefined;
+    try testing.expect(std.mem.endsWith(u8, log.bytes, try std.fmt.bufPrint(&want, "restore /tmp/pardes.dump.zon\nrestored {d} {d}\n", .{ p.panes[0].?.serial, restored.panes[0].?.serial })));
 }
 
 test "opens of the log share the open records, and a closed one frees its record" {