set SEALED flag when segment is sealed

Author: MarinPostma

libsql-wal/src/segment/mod.rs

@@ -32,6 +32,7 @@ bitflags::bitflags! {
         /// This is true for a segment created by a primary, but a replica may insert frames in any
         /// order, as long as commit boundaries are preserved.
         const FRAME_UNORDERED = 1 << 0;
+        const SEALED          = 1 << 1;
     }
 }
 

libsql-wal/src/segment/sealed.rs

@@ -17,7 +17,7 @@ use crate::io::file::{BufCopy, FileExt};
 use crate::LIBSQL_MAGIC;
 
 use super::compacted::{CompactedSegmentDataFooter, CompactedSegmentDataHeader};
-use super::{frame_offset, page_offset, Frame, FrameHeader, Segment, SegmentHeader};
+use super::{frame_offset, page_offset, Frame, FrameHeader, Segment, SegmentHeader, SegmentFlags};
 
 /// an immutable, wal segment
 #[derive(Debug)]
@@ -191,6 +191,10 @@ impl<F: FileExt> SealedSegment<F> {
         let index_offset = header.index_offset.get();
         let index_len = header.index_size.get();
 
+        if !header.flags().contains(SegmentFlags::SEALED) {
+            todo!("recover");
+        }
+
         if header.is_empty() {
             std::fs::remove_file(path)?;
             return Ok(None);