Replace usage of deprecated ioutil

Author: akrylysov

db.go

@@ -419,7 +419,11 @@ func (db *DB) FileSize() (int64, error) {
 		return 0, err
 	}
 	for _, file := range files {
-		size += file.Size()
+		info, err := file.Info()
+		if err != nil {
+			return 0, err
+		}
+		size += info.Size()
 	}
 	return size, nil
 }

db_test.go

@@ -6,7 +6,6 @@ import (
 	"flag"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"log"
 	"os"
 	"path/filepath"
@@ -30,7 +29,7 @@ var (
 func TestMain(m *testing.M) {
 	flag.Parse()
 	if !testing.Verbose() {
-		SetLogger(log.New(ioutil.Discard, "", 0))
+		SetLogger(log.New(io.Discard, "", 0))
 	}
 	// Run tests against all file systems.
 	for _, fsys := range []fs.FileSystem{fs.Mem, fs.OSMMap, fs.OS} {
@@ -43,6 +42,7 @@ func TestMain(m *testing.M) {
 			os.Exit(exitCode)
 		}
 	}
+	_ = cleanDir(testDBName)
 	os.Exit(0)
 }
 
@@ -87,6 +87,17 @@ func TestHeaderSize(t *testing.T) {
 	}
 }
 
+func cleanDir(path string) error {
+	files, err := testFS.ReadDir(path)
+	if err != nil {
+		return err
+	}
+	for _, file := range files {
+		_ = testFS.Remove(filepath.Join(testDBName, file.Name()))
+	}
+	return nil
+}
+
 func createTestDB(opts *Options) (*DB, error) {
 	if opts == nil {
 		opts = &Options{FileSystem: testFS}
@@ -95,15 +106,10 @@ func createTestDB(opts *Options) (*DB, error) {
 			opts.FileSystem = testFS
 		}
 	}
-	path := testDBName
-	files, err := testFS.ReadDir(path)
-	if err != nil && !os.IsNotExist(err) {
+	if err := cleanDir(testDBName); err != nil {
 		return nil, err
 	}
-	for _, file := range files {
-		_ = testFS.Remove(filepath.Join(path, file.Name()))
-	}
-	return Open(path, opts)
+	return Open(testDBName, opts)
 }
 
 func TestEmpty(t *testing.T) {

file_test.go

@@ -30,7 +30,7 @@ func (fs *errfs) Rename(oldpath, newpath string) error {
 	return errfileError
 }
 
-func (fs *errfs) ReadDir(name string) ([]os.FileInfo, error) {
+func (fs *errfs) ReadDir(name string) ([]os.DirEntry, error) {
 	return nil, errfileError
 }
 

fs/fs.go

@@ -56,7 +56,7 @@ type FileSystem interface {
 	Rename(oldpath, newpath string) error
 
 	// ReadDir reads the directory and returns a list of directory entries.
-	ReadDir(name string) ([]os.FileInfo, error)
+	ReadDir(name string) ([]os.DirEntry, error)
 
 	// CreateLockFile creates a lock file.
 	CreateLockFile(name string, perm os.FileMode) (LockFile, bool, error)

fs/mem.go

@@ -70,15 +70,15 @@ func (fs *memFS) Rename(oldpath, newpath string) error {
 	return os.ErrNotExist
 }
 
-func (fs *memFS) ReadDir(dir string) ([]os.FileInfo, error) {
+func (fs *memFS) ReadDir(dir string) ([]os.DirEntry, error) {
 	dir = filepath.Clean(dir)
-	var fis []os.FileInfo
+	var entries []os.DirEntry
 	for name, f := range fs.files {
 		if filepath.Dir(name) == dir {
-			fis = append(fis, f)
+			entries = append(entries, f)
 		}
 	}
-	return fis, nil
+	return entries, nil
 }
 
 type memFile struct {
@@ -223,6 +223,14 @@ func (f *memFile) Sys() interface{} {
 	return nil
 }
 
+func (f *memFile) Type() os.FileMode {
+	return f.perm
+}
+
+func (f *memFile) Info() (os.FileInfo, error) {
+	return f.Stat()
+}
+
 func (f *memFile) Slice(start int64, end int64) ([]byte, error) {
 	if f.closed {
 		return nil, os.ErrClosed

fs/os.go

@@ -1,7 +1,6 @@
 package fs
 
 import (
-	"io/ioutil"
 	"os"
 )
 
@@ -34,8 +33,8 @@ func (fs *osFS) Rename(oldpath, newpath string) error {
 	return os.Rename(oldpath, newpath)
 }
 
-func (fs *osFS) ReadDir(name string) ([]os.FileInfo, error) {
-	return ioutil.ReadDir(name)
+func (fs *osFS) ReadDir(name string) ([]os.DirEntry, error) {
+	return os.ReadDir(name)
 }
 
 type osFile struct {

fs/os_mmap_unix.go

@@ -1,4 +1,4 @@
-// +build !windows
+//go:build !windows
 
 package fs
 

fs/os_mmap_windows.go

@@ -1,4 +1,4 @@
-// +build windows
+//go:build windows
 
 package fs
 

fs/os_unix.go

@@ -1,4 +1,4 @@
-// +build !windows
+//go:build !windows
 
 package fs
 

fs/os_windows.go

@@ -1,4 +1,4 @@
-// +build windows
+//go:build windows
 
 package fs