Move from deprecated ioutil to os and io packages (#744)

main/commands/all/api/shared.go

@@ -6,7 +6,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"net/url"
 	"os"
@@ -56,10 +55,10 @@ func loadArg(arg string) (out io.Reader, err error) {
 		data, err = fetchHTTPContent(arg)
 
 	case arg == "stdin:":
-		data, err = ioutil.ReadAll(os.Stdin)
+		data, err = io.ReadAll(os.Stdin)
 
 	default:
-		data, err = ioutil.ReadFile(arg)
+		data, err = os.ReadFile(arg)
 	}
 
 	if err != nil {

main/commands/all/convert.go

@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"net/url"
 	"os"
@@ -77,10 +76,10 @@ func loadArg(arg string) (out io.Reader, err error) {
 		data, err = FetchHTTPContent(arg)
 
 	case arg == "stdin:":
-		data, err = ioutil.ReadAll(os.Stdin)
+		data, err = io.ReadAll(os.Stdin)
 
 	default:
-		data, err = ioutil.ReadFile(arg)
+		data, err = os.ReadFile(arg)
 	}
 
 	if err != nil {

main/confloader/external/external.go

@@ -5,7 +5,6 @@ package external
 import (
 	"bytes"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"net/url"
 	"os"
@@ -24,10 +23,10 @@ func ConfigLoader(arg string) (out io.Reader, err error) {
 		data, err = FetchHTTPContent(arg)
 
 	case arg == "stdin:":
-		data, err = ioutil.ReadAll(os.Stdin)
+		data, err = io.ReadAll(os.Stdin)
 
 	default:
-		data, err = ioutil.ReadFile(arg)
+		data, err = os.ReadFile(arg)
 	}
 
 	if err != nil {

main/run.go

@@ -2,7 +2,6 @@ package main
 
 import (
 	"fmt"
-	"io/ioutil"
 	"log"
 	"os"
 	"os/signal"
@@ -126,7 +125,7 @@ func getRegepxByFormat() string {
 }
 
 func readConfDir(dirPath string) {
-	confs, err := ioutil.ReadDir(dirPath)
+	confs, err := os.ReadDir(dirPath)
 	if err != nil {
 		log.Fatalln(err)
 	}