fix(pkg): stop using outdated ioutil package

Author: nicklasfrahm

pkg/engine/config.go

@@ -2,7 +2,7 @@ package engine
 
 import (
 	"errors"
-	"io/ioutil"
+	"os"
 	"strings"
 
 	"github.com/nicklasfrahm/k3se/pkg/sshx"
@@ -98,7 +98,7 @@ func (c *Config) Verify() error {
 // LoadConfig sets up the configuration parser and loads
 // the configuration file.
 func LoadConfig(configFile string) (*Config, error) {
-	configBytes, err := ioutil.ReadFile(configFile)
+	configBytes, err := os.ReadFile(configFile)
 	if err != nil {
 		return nil, err
 	}

pkg/engine/engine.go

@@ -3,7 +3,7 @@ package engine
 import (
 	"bytes"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/url"
 	"os"
@@ -309,7 +309,7 @@ func (e *Engine) KubeConfig(outputPath string) error {
 	}
 
 	// Read existing local config.
-	oldConfigBytes, err := ioutil.ReadFile(outputPath)
+	oldConfigBytes, err := os.ReadFile(outputPath)
 	if err != nil {
 		if !os.IsNotExist(err) {
 			return err
@@ -354,7 +354,7 @@ func (e *Engine) fetchInstallationScript() ([]byte, error) {
 		}
 		defer resp.Body.Close()
 
-		e.installer, err = ioutil.ReadAll(resp.Body)
+		e.installer, err = io.ReadAll(resp.Body)
 		if err != nil {
 			return nil, err
 		}

pkg/sshx/client.go

@@ -3,8 +3,8 @@ package sshx
 import (
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"net"
+	"os"
 	"os/user"
 
 	"github.com/pkg/sftp"
@@ -99,7 +99,7 @@ func (client *Client) normalizeConfig(config *Config) (*ssh.ClientConfig, error)
 			config.KeyFile = userInfo.HomeDir + config.KeyFile[1:]
 		}
 
-		keyBytes, err := ioutil.ReadFile(config.KeyFile)
+		keyBytes, err := os.ReadFile(config.KeyFile)
 		if err != nil {
 			return nil, err
 		}