.

wcfs/internal/zdata/δftail.go

@@ -302,13 +302,11 @@ func (δFtail *ΔFtail) Track(file *ZBigFile, blk int64, path []btree.LONode, bl
 	}
 }
 
-// rebuild1IfNeeded rebuilds vδE for a file if there is such need.
+// vδEForFile returns vδE and current root for specified file.
 //
-// It also returns corresponding δftail.root for convenience.
-// the only case when vδE actually needs to be rebuilt is when the file just started to be tracked.
-//
-// XXX naming -> vδEForFile ?  vδEBuildIfNeeded?
-func (δFtail *ΔFtail) rebuild1IfNeeded(foid zodb.Oid) (vδE []_ΔFileEpoch, headRoot zodb.Oid, err error) {
+// It builds vδE for that file if there is such need.
+// The only case when vδE actually needs to be built is when the file just started to be tracked.
+func (δFtail *ΔFtail) vδEForFile(foid zodb.Oid) (vδE []_ΔFileEpoch, headRoot zodb.Oid, err error) {
 	δFtail.mu.Lock() // TODO verify that there is no in-progress writers
 	defer δFtail.mu.Unlock()
 
@@ -661,7 +659,7 @@ func (δFtail *ΔFtail) SliceByFileRev(zfile *ZBigFile, lo, hi zodb.Tid) /*reado
 	//     δFile	────────o───────o──────x─────x────────────────────────
 
 
-	vδE, headRoot, err := δFtail.rebuild1IfNeeded(foid)
+	vδE, headRoot, err := δFtail.vδEForFile(foid)
 	if err != nil {
 		panic(err) // XXX
 	}
@@ -981,7 +979,7 @@ func (δFtail *ΔFtail) _BlkRevAt(ctx context.Context, zfile *ZBigFile, blk int6
 		panicf("zconn.at out of bounds: zconn.at: @%s,  (tail, head] = (@%s, @%s]", zconnAt, tail, head)
 	}
 
-	vδE, headRoot, err := δFtail.rebuild1IfNeeded(foid)
+	vδE, headRoot, err := δFtail.vδEForFile(foid)
 	if err != nil {
 		return zodb.InvalidTid, false, err
 	}