replace ioutil to os (Deprecated from Go 1.16)

gomockhandler.go

@@ -4,7 +4,6 @@ import (
 	"errors"
 	"flag"
 	"fmt"
-	"io/ioutil"
 	"log"
 	"os"
 	"path/filepath"
@@ -117,7 +116,7 @@ func prepareMockgenRunner() mockgen.Runner {
 // Plundered from golang/mock/mockgen/parse.go.
 // packageNameOfDir get package import path via dir
 func packageNameOfDir(srcDir string) (string, error) {
-	files, err := ioutil.ReadDir(srcDir)
+	files, err := os.ReadDir(srcDir)
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -153,7 +152,7 @@ func parsePackageImport(srcDir string) (string, error) {
 	if moduleMode != "off" {
 		currentDir := srcDir
 		for {
-			dat, err := ioutil.ReadFile(filepath.Join(currentDir, "go.mod"))
+			dat, err := os.ReadFile(filepath.Join(currentDir, "go.mod"))
 			if os.IsNotExist(err) {
 				if currentDir == filepath.Dir(currentDir) {
 					// at the root

internal/command/generate_config.go

@@ -1,7 +1,6 @@
 package command
 
 import (
-	"io/ioutil"
 	"log"
 	"os"
 	"path/filepath"
@@ -60,7 +59,7 @@ func (r Runner) GenerateConfig() {
 		log.Fatalf("failed to run mockgen: %v \nPlease run `%s` and check if mockgen works correctly with your options", err, r.MockgenRunner)
 	}
 
-	file, err := ioutil.ReadFile(r.MockgenRunner.GetDestination())
+	file, err := os.ReadFile(r.MockgenRunner.GetDestination())
 	if err != nil {
 		log.Fatalf("failed read file. filename: %s, err: %w", r.MockgenRunner.GetDestination(), err)
 	}

internal/command/mockgen.go

@@ -3,7 +3,6 @@ package command
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
 	"log"
 	"os"
 	"path/filepath"
@@ -82,7 +81,7 @@ func (r Runner) Mockgen() {
 			if err != nil {
 				return fmt.Errorf("failed to run mockgen: %v \nPlease run `%s` and check if mockgen works correctly with your options", err, runner)
 			}
-			file, err := ioutil.ReadFile(runner.GetDestination())
+			file, err := os.ReadFile(runner.GetDestination())
 			if err != nil {
 				return fmt.Errorf("failed read file. filename: %s, err: %w", runner.GetDestination(), err)
 			}

internal/mockgen/runner.go

@@ -2,7 +2,6 @@ package mockgen
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
@@ -32,7 +31,7 @@ func Checksum(r Runner) (string, error) {
 		return "", fmt.Errorf("failed to run mockgen: %v \nPlease run `%s` and check if mockgen works correctly with your options", err, r)
 	}
 
-	tmpFile, err := ioutil.ReadFile(tmpFilePath)
+	tmpFile, err := os.ReadFile(tmpFilePath)
 	if err != nil {
 		return "", fmt.Errorf("failed read file. filename: %s, err: %w", tmpFilePath, err)
 	}
@@ -55,7 +54,7 @@ func replaceTmpPathWithOriginal(tmpFilePath string, tmpFile []byte) string {
 }
 
 func SourceChecksum(r Runner) (string, error) {
-	file, err := ioutil.ReadFile(r.GetSource())
+	file, err := os.ReadFile(r.GetSource())
 	if err != nil {
 		return "", fmt.Errorf("failed read file. filename: %s, err: %w", r.GetSource(), err)
 	}

internal/repository/config/config.go

@@ -3,7 +3,6 @@ package config
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"os"
 
 	"github.com/sanposhiho/gomockhandler/internal/model"
@@ -20,7 +19,7 @@ func (r *Repository) Put(m *model.Config, path string) error {
 	if err != nil {
 		return fmt.Errorf("json marshal: %w", err)
 	}
-	return ioutil.WriteFile(path, d, 0644)
+	return os.WriteFile(path, d, 0644)
 }
 
 func (r *Repository) Get(path string) (*model.Config, error) {
@@ -29,7 +28,7 @@ func (r *Repository) Get(path string) (*model.Config, error) {
 		return nil, err
 	}
 
-	raw, err := ioutil.ReadFile(path)
+	raw, err := os.ReadFile(path)
 	if err != nil {
 		return nil, fmt.Errorf("read file: %w", err)
 	}

internal/util/files.go

@@ -5,14 +5,13 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
 )
 
 func Tree(dir string) ([]string, error) {
-	files, err := ioutil.ReadDir(dir)
+	files, err := os.ReadDir(dir)
 	if err != nil {
 		return []string{}, fmt.Errorf("failed to get dir: %w", err)
 	}