Fix deprecated uses of ioutil

cmd/init.go

@@ -4,7 +4,6 @@ import (
 	"bufio"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"sort"
@@ -134,7 +133,7 @@ var initCmd = &cobra.Command{
 		_, err = os.Stat(indexFilePath)
 		if os.IsNotExist(err) {
 			// Create file
-			err = ioutil.WriteFile(indexFilePath, []byte{}, 0644)
+			err = os.WriteFile(indexFilePath, []byte{}, 0644)
 			if err != nil {
 				fmt.Printf("Error creating index file: %s\n", err)
 				os.Exit(1)

core/download.go

@@ -6,7 +6,6 @@ import (
 	"fmt"
 	"golang.org/x/exp/slices"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -108,7 +107,7 @@ func (d *downloadSessionInternal) SaveIndex() error {
 	if err != nil {
 		return fmt.Errorf("failed to serialise index: %w", err)
 	}
-	err = ioutil.WriteFile(filepath.Join(d.cacheFolder, "index.json"), data, 0644)
+	err = os.WriteFile(filepath.Join(d.cacheFolder, "index.json"), data, 0644)
 	if err != nil {
 		return fmt.Errorf("failed to write index: %w", err)
 	}
@@ -146,7 +145,7 @@ func reuseExistingFile(cacheHandle *CacheIndexHandle, hashesToObtain []string, m
 
 func downloadNewFile(task *downloadTask, cacheFolder string, hashesToObtain []string, index *CacheIndex) (CompletedDownload, error) {
 	// Create temp file to download to
-	tempFile, err := ioutil.TempFile(filepath.Join(cacheFolder, "temp"), "download-tmp")
+	tempFile, err := os.CreateTemp(filepath.Join(cacheFolder, "temp"), "download-tmp")
 	if err != nil {
 		return CompletedDownload{}, fmt.Errorf("failed to create temporary file for download: %w", err)
 	}
@@ -551,7 +550,7 @@ func CreateDownloadSession(mods []*Mod, hashesToObtain []string) (DownloadSessio
 	if err != nil {
 		return nil, fmt.Errorf("failed to create cache temp directory: %w", err)
 	}
-	cacheIndexData, err := ioutil.ReadFile(filepath.Join(cachePath, "index.json"))
+	cacheIndexData, err := os.ReadFile(filepath.Join(cachePath, "index.json"))
 	if err != nil {
 		if !os.IsNotExist(err) {
 			return nil, fmt.Errorf("failed to read cache index file: %w", err)

core/index.go

@@ -4,7 +4,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"sort"
@@ -183,7 +182,7 @@ var ignoreDefaults = []string{
 }
 
 func readGitignore(path string) (*gitignore.GitIgnore, bool) {
-	data, err := ioutil.ReadFile(path)
+	data, err := os.ReadFile(path)
 	if err != nil {
 		// TODO: check for read errors (and present them)
 		return gitignore.CompileIgnoreLines(ignoreDefaults...), false

curseforge/import.go

@@ -8,7 +8,6 @@ import (
 	"fmt"
 	"github.com/packwiz/packwiz/curseforge/packinterop"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"runtime"
@@ -97,7 +96,7 @@ var importCmd = &cobra.Command{
 			// Check if file is a zip
 			if string(header) == "PK" {
 				// Read the whole file (as bufio doesn't work for zips)
-				zipData, err := ioutil.ReadAll(buf)
+				zipData, err := io.ReadAll(buf)
 				if err != nil {
 					fmt.Printf("Error reading file: %s\n", err)
 					os.Exit(1)
@@ -142,7 +141,7 @@ var importCmd = &cobra.Command{
 			_, err = os.Stat(indexFilePath)
 			if os.IsNotExist(err) {
 				// Create file
-				err = ioutil.WriteFile(indexFilePath, []byte{}, 0644)
+				err = os.WriteFile(indexFilePath, []byte{}, 0644)
 				if err != nil {
 					fmt.Printf("Error creating index file: %s\n", err)
 					os.Exit(1)

curseforge/packinterop/disk.go

@@ -3,7 +3,6 @@ package packinterop
 import (
 	"bufio"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 )
@@ -68,7 +67,7 @@ func (s diskPackSource) GetFileList() ([]ImportPackFile, error) {
 }
 
 func (s diskPackSource) GetPackFile() ImportPackFile {
-	rc := ioutil.NopCloser(s.MetaSource)
+	rc := io.NopCloser(s.MetaSource)
 	return readerFile{s.MetaName, &rc}
 }
 

curseforge/packinterop/translation.go

@@ -6,7 +6,6 @@ import (
 	"fmt"
 	"github.com/packwiz/packwiz/core"
 	"io"
-	"io/ioutil"
 	"os"
 )
 
@@ -20,7 +19,7 @@ func ReadMetadata(s ImportPackSource) ImportPackMetadata {
 	}
 
 	// Read the whole file (as we are going to parse it multiple times)
-	fileData, err := ioutil.ReadAll(rdr)
+	fileData, err := io.ReadAll(rdr)
 	if err != nil {
 		fmt.Printf("Error reading file: %s\n", err)
 		os.Exit(1)