remove deprecated ioutils package

Author: ryarnyah

cmd/dblock/dblock.go

@@ -4,7 +4,6 @@ import (
 	"encoding/json"
 	"flag"
 	"fmt"
-	"io/ioutil"
 	"log"
 	"os"
 
@@ -42,15 +41,18 @@ func persistModel(m *model.DatabaseSchema) {
 	if err != nil {
 		glog.Fatal(err)
 	}
-	err = ioutil.WriteFile(*schemaLockFile, b, 0644)
+	err = os.WriteFile(*schemaLockFile, b, 0644)
 	if err != nil {
 		glog.Fatal(err)
 	}
 	glog.Info("Database schemas has been writen successfully.")
 }
 
 func main() {
-	flag.Set("logtostderr", "true")
+	err := flag.Set("logtostderr", "true")
+	if err != nil {
+		glog.Fatal(err.Error())
+	}
 	flag.Usage = func() {
 		fmt.Fprintf(os.Stderr, BANNER, version.VERSION, version.GITCOMMIT)
 		flag.PrintDefaults()
@@ -75,7 +77,7 @@ func main() {
 	if err != nil {
 		glog.Fatal(err)
 	}
-	b, err := ioutil.ReadFile(*schemaLockFile)
+	b, err := os.ReadFile(*schemaLockFile)
 	if err != nil {
 		glog.Fatal(err)
 	}
@@ -100,7 +102,7 @@ func main() {
 		if err != nil {
 			log.Fatal(err)
 		}
-		err = ioutil.WriteFile(*errorFile, b, 0644)
+		err = os.WriteFile(*errorFile, b, 0644)
 		if err != nil {
 			log.Fatal(err)
 		}

pkg/provider/file/file.go

@@ -3,7 +3,7 @@ package file
 import (
 	"encoding/json"
 	"flag"
-	"io/ioutil"
+	"os"
 
 	"github.com/ryarnyah/dblock/pkg/model"
 	"github.com/ryarnyah/dblock/pkg/provider"
@@ -20,7 +20,7 @@ func init() {
 }
 
 func (s fileProvider) GetCurrentModel() (*model.DatabaseSchema, error) {
-	b, err := ioutil.ReadFile(*fileSource)
+	b, err := os.ReadFile(*fileSource)
 	if err != nil {
 		return nil, err
 	}

pkg/provider/file/file_test.go

@@ -2,7 +2,6 @@ package file
 
 import (
 	"encoding/json"
-	"io/ioutil"
 	"os"
 	"reflect"
 	"testing"
@@ -22,14 +21,14 @@ func TestFileNotFound(t *testing.T) {
 
 func TestDefunctFile(t *testing.T) {
 	fileProvider := fileProvider{}
-	f, err := ioutil.TempFile("", "test-file")
+	f, err := os.CreateTemp("", "test-file")
 	if err != nil {
 		t.Fatal(err)
 	}
 	defer os.Remove(f.Name())
 	*fileSource = f.Name()
 
-	f.WriteString("very bad file")
+	_, _ = f.WriteString("very bad file")
 	_, err = fileProvider.GetCurrentModel()
 	if err == nil {
 		t.Fatal("must be unable to parse file")
@@ -38,7 +37,7 @@ func TestDefunctFile(t *testing.T) {
 
 func TestLoadModelFromFile(t *testing.T) {
 	fileProvider := fileProvider{}
-	f, err := ioutil.TempFile("", "test-file")
+	f, err := os.CreateTemp("", "test-file")
 	if err != nil {
 		t.Fatal(err)
 	}