Fix db lookup for wal file

db.go

@@ -244,7 +244,13 @@ func (db *DB) shadowWALExists() (bool, error) {
 // contents of the database page.
 func (db *DB) recoverShadowWALOnly() error {
 	db.logger.Printf("recovering: shadow WAL only")
-	panic("TODO")
+
+	// TODO: Verify last page in shadow WAL matches data in DB.
+
+	db.processedWALByteN = 0
+	db.pendingWALByteN = 0
+
+	return nil
 }
 
 // recoverRealAndShadowWALs verifies the last page of the real & shadow WALs match.

file_system.go

@@ -1,9 +1,11 @@
 package litestream
 
 import (
+	"fmt"
 	"log"
 	"os"
 	"path/filepath"
+	"sort"
 	"sync"
 
 	"bazil.org/fuse/fs"
@@ -71,12 +73,24 @@ func (f *FileSystem) Open() error {
 
 // DB returns the DB object associated with path.
 func (f *FileSystem) DB(path string) *DB {
+	fmt.Println("dbg/dbs", path, "--", f.DBPaths())
+
 	f.mu.RLock()
 	defer f.mu.RUnlock()
 	db := f.dbs[path]
 	return db
 }
 
+// DBPaths returns a sorted list of all paths managed by the file system.
+func (f *FileSystem) DBPaths() []string {
+	a := make([]string, 0, len(f.dbs))
+	for k := range f.dbs {
+		a = append(a, k)
+	}
+	sort.Strings(a)
+	return a
+}
+
 // OpenDB initializes a DB for a given path.
 func (f *FileSystem) OpenDB(path string) error {
 	f.mu.Lock()

node.go

@@ -64,9 +64,12 @@ func (n *Node) IsWAL() bool {
 // DB returns the DB object associated with the node, if any.
 // If node points to a "-wal" file then the associated DB is returned.
 func (n *Node) DB() *DB {
-	if strings.HasPrefix(n.path, sqlite.WALSuffix) {
+	println("dbg/node.db", n.path, strings.HasPrefix(n.path, sqlite.WALSuffix))
+	if strings.HasSuffix(n.path, sqlite.WALSuffix) {
+		println("dbg/node.db.trim", n.path, strings.TrimSuffix(n.path, sqlite.WALSuffix))
 		return n.fs.DB(strings.TrimSuffix(n.path, sqlite.WALSuffix))
 	}
+	println("dbg/node.db.other", n.path)
 	return n.fs.DB(n.path)
 }