go: removed io/ioutil

Since the minimum required version of Go has been bumped to 1.16, the
deprecation of io/ioutil can now be acted upon. This Commit removes the
remaining dependencies on ioutil and replaces them with their io or os
counterparts.

Signed-off-by: Moritz Poldrack <git@moritz.sh>
Acked-by: Robin Jarry <robin@jarry.cc>

20 files changed, 34 insertions, 47 deletions

diff --git a/commands/account/recover.go b/commands/account/recover.go
index 7a1100e4..682a99c5 100644
--- a/commands/account/recover.go
+++ b/commands/account/recover.go
@@ -3,7 +3,7 @@ package account
 import (
 	"bytes"
 	"errors"
-	"io/ioutil"
+	"io"
 	"os"
 	"path/filepath"
 
@@ -89,7 +89,7 @@ func (Recover) Execute(aerc *widgets.Aerc, args []string) error {
 			return nil, err
 		}
 		defer recoverFile.Close()
-		data, err := ioutil.ReadAll(recoverFile)
+		data, err := io.ReadAll(recoverFile)
 		if err != nil {
 			return nil, err
 		}
diff --git a/commands/msg/forward.go b/commands/msg/forward.go
index d89667ae..040360ea 100644
--- a/commands/msg/forward.go
+++ b/commands/msg/forward.go
@@ -6,7 +6,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"math/rand"
 	"os"
 	"path"
@@ -124,7 +123,7 @@ func (forward) Execute(aerc *widgets.Aerc, args []string) error {
 	}
 
 	if attachFull {
-		tmpDir, err := ioutil.TempDir("", "aerc-tmp-attachment")
+		tmpDir, err := os.MkdirTemp("", "aerc-tmp-attachment")
 		if err != nil {
 			return err
 		}
diff --git a/commands/msgview/open.go b/commands/msgview/open.go
index 05a3c63c..f3723fbc 100644
--- a/commands/msgview/open.go
+++ b/commands/msgview/open.go
@@ -3,7 +3,6 @@ package msgview
 import (
 	"fmt"
 	"io"
-	"io/ioutil"
 	"mime"
 	"os"
 	"time"
@@ -60,7 +59,7 @@ func (Open) Execute(aerc *widgets.Aerc, args []string) error {
 			}
 		}
 
-		tmpFile, err := ioutil.TempFile(os.TempDir(), "aerc-*"+extension)
+		tmpFile, err := os.CreateTemp(os.TempDir(), "aerc-*"+extension)
 		if err != nil {
 			aerc.PushError(err.Error())
 			return
diff --git a/completer/completer.go b/completer/completer.go
index 202607a9..bbeb5f1c 100644
--- a/completer/completer.go
+++ b/completer/completer.go
@@ -5,7 +5,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"mime"
 	"net/mail"
 	"os/exec"
@@ -100,7 +99,7 @@ func (c *Completer) completeAddress(s string) ([]string, string, error) {
 
 	completions, err := readCompletions(stdout)
 	if err != nil {
-		buf, _ := ioutil.ReadAll(stderr)
+		buf, _ := io.ReadAll(stderr)
 		msg := strings.TrimSpace(string(buf))
 		if msg != "" {
 			msg = ": " + msg
diff --git a/config/config.go b/config/config.go
index 66c6dd19..c6fe70ee 100644
--- a/config/config.go
+++ b/config/config.go
@@ -3,7 +3,6 @@ package config
 import (
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"log"
 	"net/url"
 	"os"
@@ -407,7 +406,7 @@ func installTemplate(root, name string) error {
 	}
 	var data []byte
 	for _, dir := range searchDirs {
-		data, err = ioutil.ReadFile(path.Join(dir, name))
+		data, err = os.ReadFile(path.Join(dir, name))
 		if err == nil {
 			break
 		}
@@ -415,7 +414,7 @@ func installTemplate(root, name string) error {
 	if err != nil {
 		return err
 	}
-	err = ioutil.WriteFile(path.Join(root, name), data, 0o644)
+	err = os.WriteFile(path.Join(root, name), data, 0o644)
 	if err != nil {
 		return err
 	}
diff --git a/lib/crypto/gpg/gpgbin/decrypt.go b/lib/crypto/gpg/gpgbin/decrypt.go
index 09626303..86d5575e 100644
--- a/lib/crypto/gpg/gpgbin/decrypt.go
+++ b/lib/crypto/gpg/gpgbin/decrypt.go
@@ -3,7 +3,6 @@ package gpgbin
 import (
 	"bytes"
 	"io"
-	"io/ioutil"
 
 	"git.sr.ht/~rjarry/aerc/models"
 )
@@ -12,7 +11,7 @@ import (
 // the signature is also verified
 func Decrypt(r io.Reader) (*models.MessageDetails, error) {
 	md := new(models.MessageDetails)
-	orig, err := ioutil.ReadAll(r)
+	orig, err := io.ReadAll(r)
 	if err != nil {
 		return md, err
 	}
diff --git a/lib/crypto/gpg/gpgbin/verify.go b/lib/crypto/gpg/gpgbin/verify.go
index 5079a0a2..8208dc0d 100644
--- a/lib/crypto/gpg/gpgbin/verify.go
+++ b/lib/crypto/gpg/gpgbin/verify.go
@@ -3,7 +3,6 @@ package gpgbin
 import (
 	"bytes"
 	"io"
-	"io/ioutil"
 	"os"
 
 	"git.sr.ht/~rjarry/aerc/models"
@@ -15,7 +14,7 @@ func Verify(m io.Reader, s io.Reader) (*models.MessageDetails, error) {
 	args := []string{"--verify"}
 	if s != nil {
 		// Detached sig, save the sig to a tmp file and send msg over stdin
-		sig, err := ioutil.TempFile("", "sig")
+		sig, err := os.CreateTemp("", "sig")
 		if err != nil {
 			return nil, err
 		}
@@ -24,7 +23,7 @@ func Verify(m io.Reader, s io.Reader) (*models.MessageDetails, error) {
 		defer os.Remove(sig.Name())
 		args = append(args, sig.Name(), "-")
 	}
-	orig, err := ioutil.ReadAll(m)
+	orig, err := io.ReadAll(m)
 	if err != nil {
 		return nil, err
 	}
diff --git a/lib/crypto/pgp/pgp.go b/lib/crypto/pgp/pgp.go
index 689bae3f..f5612eea 100644
--- a/lib/crypto/pgp/pgp.go
+++ b/lib/crypto/pgp/pgp.go
@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path"
 	"strings"
@@ -122,7 +121,7 @@ func (m *Mail) Decrypt(r io.Reader, decryptKeys openpgp.PromptFunction) (*models
 	if pgpReader.MessageDetails.IsSigned {
 		// we should consume the UnverifiedBody until EOF in order
 		// to get the correct signature data
-		data, err := ioutil.ReadAll(pgpReader.MessageDetails.UnverifiedBody)
+		data, err := io.ReadAll(pgpReader.MessageDetails.UnverifiedBody)
 		if err != nil {
 			return nil, err
 		}
diff --git a/lib/messageview.go b/lib/messageview.go
index e0e86ea1..6ad86c9c 100644
--- a/lib/messageview.go
+++ b/lib/messageview.go
@@ -3,7 +3,6 @@ package lib
 import (
 	"bytes"
 	"io"
-	"io/ioutil"
 
 	"github.com/ProtonMail/go-crypto/openpgp"
 	"github.com/emersion/go-message"
@@ -77,7 +76,7 @@ func NewMessageStoreView(messageInfo *models.MessageInfo,
 				cb(nil, err)
 				return
 			}
-			msv.message, err = ioutil.ReadAll(md.Body)
+			msv.message, err = io.ReadAll(md.Body)
 			if err != nil {
 				cb(nil, err)
 				return
diff --git a/lib/parse/hyperlinks_test.go b/lib/parse/hyperlinks_test.go
index f16392a5..ba67664b 100644
--- a/lib/parse/hyperlinks_test.go
+++ b/lib/parse/hyperlinks_test.go
@@ -1,7 +1,7 @@
 package parse_test
 
 import (
-	"io/ioutil"
+	"io"
 	"strings"
 	"testing"
 
@@ -75,7 +75,7 @@ func TestHyperlinks(t *testing.T) {
 
 		// make sure reader is exact copy of input reader
 		reader, links := parse.HttpLinks(strings.NewReader(test.text))
-		if data, err := ioutil.ReadAll(reader); err != nil {
+		if data, err := io.ReadAll(reader); err != nil {
 			t.Errorf("could not read text: %v", err)
 		} else if string(data) != test.text {
 			t.Errorf("did not copy input reader correctly")
diff --git a/logging/logger.go b/logging/logger.go
index cf7192eb..0e87fe06 100644
--- a/logging/logger.go
+++ b/logging/logger.go
@@ -2,7 +2,7 @@ package logging
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io"
 	"log"
 	"os"
 )
@@ -24,7 +24,7 @@ func Init() {
 
 func ErrorLogger() *log.Logger {
 	if err == nil {
-		return log.New(ioutil.Discard, "", log.LstdFlags)
+		return log.New(io.Discard, "", log.LstdFlags)
 	}
 	return err
 }
diff --git a/widgets/compose.go b/widgets/compose.go
index 670f4f2a..5106e17d 100644
--- a/widgets/compose.go
+++ b/widgets/compose.go
@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/textproto"
 	"os"
 	"os/exec"
@@ -92,7 +91,7 @@ func NewComposer(aerc *Aerc, acct *AccountView, conf *config.AercConfig,
 		logging.Errorf("could not complete header: %v", err)
 	})
 
-	email, err := ioutil.TempFile("", "aerc-compose-*.eml")
+	email, err := os.CreateTemp("", "aerc-compose-*.eml")
 	if err != nil {
 		// TODO: handle this better
 		return nil, err
@@ -454,7 +453,7 @@ func (c *Composer) readSignatureFromFile() []byte {
 	if err != nil {
 		return nil
 	}
-	signature, err := ioutil.ReadFile(sigFile)
+	signature, err := os.ReadFile(sigFile)
 	if err != nil {
 		c.aerc.PushError(
 			fmt.Sprintf(" Error loading signature from file: %v", sigFile))
diff --git a/worker/lib/parse_test.go b/worker/lib/parse_test.go
index 7e5bb367..227b121e 100644
--- a/worker/lib/parse_test.go
+++ b/worker/lib/parse_test.go
@@ -2,7 +2,6 @@ package lib
 
 import (
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -12,7 +11,7 @@ import (
 
 func TestMessageInfoParser(t *testing.T) {
 	rootDir := "testdata/message/valid"
-	msgFiles, err := ioutil.ReadDir(rootDir)
+	msgFiles, err := os.ReadDir(rootDir)
 	die(err)
 
 	for _, fi := range msgFiles {
@@ -37,7 +36,7 @@ func TestMessageInfoParser(t *testing.T) {
 
 func TestMessageInfoHandledError(t *testing.T) {
 	rootDir := "testdata/message/invalid"
-	msgFiles, err := ioutil.ReadDir(rootDir)
+	msgFiles, err := os.ReadDir(rootDir)
 	die(err)
 
 	for _, fi := range msgFiles {
diff --git a/worker/lib/search.go b/worker/lib/search.go
index 551d33cd..fe1ec114 100644
--- a/worker/lib/search.go
+++ b/worker/lib/search.go
@@ -1,7 +1,7 @@
 package lib
 
 import (
-	"io/ioutil"
+	"io"
 	"net/textproto"
 	"strings"
 	"unicode"
@@ -129,7 +129,7 @@ func searchMessage(message RawMessage, criteria *searchCriteria,
 			return false, err
 		}
 		defer reader.Close()
-		bytes, err := ioutil.ReadAll(reader)
+		bytes, err := io.ReadAll(reader)
 		if err != nil {
 			return false, err
 		}
@@ -141,7 +141,7 @@ func searchMessage(message RawMessage, criteria *searchCriteria,
 			return false, err
 		}
 		defer reader.Close()
-		bytes, err := ioutil.ReadAll(reader)
+		bytes, err := io.ReadAll(reader)
 		if err != nil {
 			return false, err
 		}
diff --git a/worker/maildir/search.go b/worker/maildir/search.go
index 6260deb4..2ad1c0e1 100644
--- a/worker/maildir/search.go
+++ b/worker/maildir/search.go
@@ -1,7 +1,7 @@
 package maildir
 
 import (
-	"io/ioutil"
+	"io"
 	"net/textproto"
 	"strings"
 	"unicode"
@@ -151,7 +151,7 @@ func (w *Worker) searchKey(key uint32, criteria *searchCriteria,
 		if err != nil {
 			return false, err
 		}
-		bytes, err := ioutil.ReadAll(reader)
+		bytes, err := io.ReadAll(reader)
 		if err != nil {
 			return false, err
 		}
@@ -163,7 +163,7 @@ func (w *Worker) searchKey(key uint32, criteria *searchCriteria,
 			return false, err
 		}
 		defer reader.Close()
-		bytes, err := ioutil.ReadAll(reader)
+		bytes, err := io.ReadAll(reader)
 		if err != nil {
 			return false, err
 		}
diff --git a/worker/maildir/worker.go b/worker/maildir/worker.go
index 9f9fee9a..e482f4e0 100644
--- a/worker/maildir/worker.go
+++ b/worker/maildir/worker.go
@@ -6,7 +6,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/url"
 	"os"
 	"os/exec"
@@ -543,7 +542,7 @@ func (w *Worker) handleFetchFullMessages(msg *types.FetchFullMessages) error {
 			return err
 		}
 		defer r.Close()
-		b, err := ioutil.ReadAll(r)
+		b, err := io.ReadAll(r)
 		if err != nil {
 			return err
 		}
diff --git a/worker/mbox/io.go b/worker/mbox/io.go
index 67290482..31a906cc 100644
--- a/worker/mbox/io.go
+++ b/worker/mbox/io.go
@@ -3,7 +3,6 @@ package mboxer
 import (
 	"errors"
 	"io"
-	"io/ioutil"
 	"time"
 
 	"git.sr.ht/~rjarry/aerc/models"
@@ -23,7 +22,7 @@ func Read(r io.Reader) ([]lib.RawMessage, error) {
 			return nil, err
 		}
 
-		content, err := ioutil.ReadAll(msg)
+		content, err := io.ReadAll(msg)
 		if err != nil {
 			return nil, err
 		}
diff --git a/worker/mbox/models.go b/worker/mbox/models.go
index 849133c1..eec73379 100644
--- a/worker/mbox/models.go
+++ b/worker/mbox/models.go
@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"io/ioutil"
 
 	"git.sr.ht/~rjarry/aerc/models"
 	"git.sr.ht/~rjarry/aerc/worker/lib"
@@ -150,7 +149,7 @@ func (f *container) newUid() (next uint32) {
 }
 
 func (f *container) Append(r io.Reader, flags []models.Flag) error {
-	data, err := ioutil.ReadAll(r)
+	data, err := io.ReadAll(r)
 	if err != nil {
 		return err
 	}
@@ -170,7 +169,7 @@ type message struct {
 }
 
 func (m *message) NewReader() (io.ReadCloser, error) {
-	return ioutil.NopCloser(bytes.NewReader(m.content)), nil
+	return io.NopCloser(bytes.NewReader(m.content)), nil
 }
 
 func (m *message) ModelFlags() ([]models.Flag, error) {
diff --git a/worker/mbox/worker.go b/worker/mbox/worker.go
index 1e3ab982..78a9b1b6 100644
--- a/worker/mbox/worker.go
+++ b/worker/mbox/worker.go
@@ -4,7 +4,7 @@ import (
 	"bytes"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/url"
 	"os"
 	"path/filepath"
@@ -224,7 +224,7 @@ func (w *mboxWorker) handleMessage(msg types.WorkerMessage) error {
 				continue
 			}
 			defer r.Close()
-			b, err := ioutil.ReadAll(r)
+			b, err := io.ReadAll(r)
 			if err != nil {
 				logging.Errorf("could not get message reader: %w", err)
 				continue
diff --git a/worker/notmuch/worker.go b/worker/notmuch/worker.go
index e6a9a492..903460eb 100644
--- a/worker/notmuch/worker.go
+++ b/worker/notmuch/worker.go
@@ -9,7 +9,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/url"
 	"os"
 	"os/exec"
@@ -396,7 +396,7 @@ func (w *worker) handleFetchFullMessages(msg *types.FetchFullMessages) error {
 			return err
 		}
 		defer r.Close()
-		b, err := ioutil.ReadAll(r)
+		b, err := io.ReadAll(r)
 		if err != nil {
 			return err
 		}