Replace deprecated ioutil with io and os

https://pkg.go.dev/io/ioutil is deprecated since Go 1.16.

commands/commandeer.go

@@ -16,7 +16,7 @@ package commands
 import (
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net"
 	"os"
 	"path/filepath"
@@ -201,7 +201,7 @@ func newCommandeer(mustHaveConfigFile, failOnInitErr, running bool, h *hugoBuild
 		rebuildDebouncer = debounce.New(4 * time.Second)
 	}
 
-	out := ioutil.Discard
+	out := io.Discard
 	if !h.quiet {
 		out = os.Stdout
 	}
@@ -221,7 +221,7 @@ func newCommandeer(mustHaveConfigFile, failOnInitErr, running bool, h *hugoBuild
 		running:            running,
 
 		// This will be replaced later, but we need something to log to before the configuration is read.
-		logger: loggers.NewLogger(jww.LevelWarn, jww.LevelError, out, ioutil.Discard, running),
+		logger: loggers.NewLogger(jww.LevelWarn, jww.LevelError, out, io.Discard, running),
 	}
 
 	return c, c.loadConfig()

commands/commands_test.go

@@ -15,7 +15,6 @@ package commands
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -402,7 +401,7 @@ PostProcess: {{ $foo.RelPermalink }}
 
 func writeFile(t testing.TB, filename, content string) {
 	must(t, os.MkdirAll(filepath.Dir(filename), os.FileMode(0755)))
-	must(t, ioutil.WriteFile(filename, []byte(content), os.FileMode(0755)))
+	must(t, os.WriteFile(filename, []byte(content), os.FileMode(0755)))
 }
 
 func must(t testing.TB, err error) {

commands/hugo.go

@@ -18,7 +18,7 @@ package commands
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"os"
 	"os/signal"
 	"path/filepath"
@@ -138,10 +138,10 @@ func initializeConfig(mustHaveConfigFile, failOnInitErr, running bool,
 
 func (c *commandeer) createLogger(cfg config.Provider) (loggers.Logger, error) {
 	var (
-		logHandle       = ioutil.Discard
+		logHandle       = io.Discard
 		logThreshold    = jww.LevelWarn
 		logFile         = cfg.GetString("logFile")
-		outHandle       = ioutil.Discard
+		outHandle       = io.Discard
 		stdoutThreshold = jww.LevelWarn
 	)
 
@@ -157,7 +157,7 @@ func (c *commandeer) createLogger(cfg config.Provider) (loggers.Logger, error) {
 				return nil, newSystemError("Failed to open log file:", logFile, err)
 			}
 		} else {
-			logHandle, err = ioutil.TempFile("", "hugo")
+			logHandle, err = os.CreateTemp("", "hugo")
 			if err != nil {
 				return nil, newSystemError(err)
 			}

commands/import_jekyll.go

@@ -17,7 +17,7 @@ import (
 	"bytes"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"os"
 	"path/filepath"
 	"regexp"
@@ -164,7 +164,7 @@ func (i *importCmd) importFromJekyll(cmd *cobra.Command, args []string) error {
 func (i *importCmd) getJekyllDirInfo(fs afero.Fs, jekyllRoot string) (map[string]bool, bool) {
 	postDirs := make(map[string]bool)
 	hasAnyPost := false
-	if entries, err := ioutil.ReadDir(jekyllRoot); err == nil {
+	if entries, err := os.ReadDir(jekyllRoot); err == nil {
 		for _, entry := range entries {
 			if entry.IsDir() {
 				subDir := filepath.Join(jekyllRoot, entry.Name())
@@ -186,7 +186,7 @@ func (i *importCmd) retrieveJekyllPostDir(fs afero.Fs, dir string) (bool, bool)
 		return true, !isEmpty
 	}
 
-	if entries, err := ioutil.ReadDir(dir); err == nil {
+	if entries, err := os.ReadDir(dir); err == nil {
 		for _, entry := range entries {
 			if entry.IsDir() {
 				subDir := filepath.Join(dir, entry.Name())
@@ -247,7 +247,7 @@ func (i *importCmd) loadJekyllConfig(fs afero.Fs, jekyllRoot string) map[string]
 
 	defer f.Close()
 
-	b, err := ioutil.ReadAll(f)
+	b, err := io.ReadAll(f)
 	if err != nil {
 		return nil
 	}
@@ -310,7 +310,7 @@ func (i *importCmd) copyJekyllFilesAndFolders(jekyllRoot, dest string, jekyllPos
 	if err != nil {
 		return err
 	}
-	entries, err := ioutil.ReadDir(jekyllRoot)
+	entries, err := os.ReadDir(jekyllRoot)
 	if err != nil {
 		return err
 	}
@@ -386,7 +386,7 @@ func convertJekyllPost(path, relPath, targetDir string, draft bool) error {
 	targetParentDir := filepath.Dir(targetFile)
 	os.MkdirAll(targetParentDir, 0777)
 
-	contentBytes, err := ioutil.ReadFile(path)
+	contentBytes, err := os.ReadFile(path)
 	if err != nil {
 		jww.ERROR.Println("Read file error:", path)
 		return err