update golangci-lint and replace deprecated calls to io/ioutil

utils/checksum_test.go

@@ -1,7 +1,6 @@
 package utils
 
 import (
-	"io/ioutil"
 	"os"
 
 	. "gopkg.in/check.v1"
@@ -14,7 +13,7 @@ type ChecksumSuite struct {
 var _ = Suite(&ChecksumSuite{})
 
 func (s *ChecksumSuite) SetUpTest(c *C) {
-	s.tempfile, _ = ioutil.TempFile(c.MkDir(), "aptly-test")
+	s.tempfile, _ = os.CreateTemp(c.MkDir(), "aptly-test")
 	s.tempfile.WriteString(testString)
 }
 

utils/compress_test.go

@@ -18,7 +18,7 @@ var _ = Suite(&CompressSuite{})
 const testString = "Quick brown fox jumps over black dog and runs away... Really far away... who knows?"
 
 func (s *CompressSuite) SetUpTest(c *C) {
-	s.tempfile, _ = ioutil.TempFile(c.MkDir(), "aptly-test")
+	s.tempfile, _ = os.CreateTemp(c.MkDir(), "aptly-test")
 	s.tempfile.WriteString(testString)
 }
 

utils/copyfile_test.go

@@ -1,7 +1,6 @@
 package utils
 
 import (
-	"io/ioutil"
 	"os"
 	"path/filepath"
 
@@ -16,7 +15,7 @@ type CopyfileSuite struct {
 var _ = Suite(&CopyfileSuite{})
 
 func (s *CopyfileSuite) SetUpSuite(c *C) {
-	s.source, _ = ioutil.TempFile(c.MkDir(), "source-file")
+	s.source, _ = os.CreateTemp(c.MkDir(), "source-file")
 	s.dest = filepath.Join(filepath.Dir(s.source.Name()), "destination-file")
 }
 

utils/utils_test.go

@@ -2,7 +2,6 @@ package utils
 
 import (
 	"fmt"
-	"io/ioutil"
 	"log"
 	"os"
 	"testing"
@@ -22,7 +21,7 @@ type UtilsSuite struct {
 var _ = Suite(&UtilsSuite{})
 
 func (s *UtilsSuite) SetUpSuite(c *C) {
-	s.tempfile, _ = ioutil.TempFile(c.MkDir(), "aptly-test-inaccessible")
+	s.tempfile, _ = os.CreateTemp(c.MkDir(), "aptly-test-inaccessible")
 	if err := os.Chmod(s.tempfile.Name(), 0000); err != nil {
 		log.Fatalln(err)
 	}