Stream snapshot file listings

internal/restic/restic_test.go

@@ -233,6 +233,36 @@ printf '%%s\n' 'Files: 1 new, 1 removed, 2 changed'
 	}
 }
 
+func TestListStreamsSnapshotNodes(t *testing.T) {
+	dir := t.TempDir()
+	argsPath := filepath.Join(dir, "args")
+	script := filepath.Join(dir, "restic")
+	body := fmt.Sprintf(`#!/bin/sh
+printf '%%s\n' "$@" > '%s'
+printf '%%s\n' '{"struct_type":"snapshot","id":"snap"}'
+printf '%%s\n' '{"struct_type":"node","path":"/mnt/user","type":"dir"}'
+printf '%%s\n' '{"struct_type":"node","path":"/mnt/user/file.txt","type":"file","size":12}'
+`, argsPath)
+	if err := os.WriteFile(script, []byte(body), 0700); err != nil {
+		t.Fatal(err)
+	}
+	runner := &Runner{Binary: script, RuntimeDir: dir, Secrets: fakeSecrets{"password": "secret"}}
+	repo := model.Repository{Type: model.RepositoryLocal, Location: "/repo", PasswordRef: "password"}
+	items, err := runner.List(context.Background(), repo, "snap", "/mnt/user")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(items) != 2 || items[0]["path"] != "/mnt/user" || items[1]["path"] != "/mnt/user/file.txt" {
+		t.Fatalf("unexpected items: %+v", items)
+	}
+	args, _ := os.ReadFile(argsPath)
+	for _, expected := range []string{"ls", "snap", "--json", "/mnt/user"} {
+		if !strings.Contains(string(args), expected) {
+			t.Fatalf("arguments missing %q: %s", expected, args)
+		}
+	}
+}
+
 func TestStatsUsesRequestedRepositoryCountingMode(t *testing.T) {
 	dir := t.TempDir()
 	argsPath := filepath.Join(dir, "args")