go1.24: fix lint, unit and system tests

- development env: base on debian trixie with go1.24
- lint: run with default config
- fix lint errors
- fix unit tests
- fix system test

azure/package_pool.go

@@ -29,7 +29,7 @@ func NewPackagePool(accountName, accountKey, container, prefix, endpoint string)
 	return &PackagePool{az: azctx}, nil
 }
 
-// String
+// String returns the storage as string
 func (pool *PackagePool) String() string {
 	return pool.az.String()
 }
@@ -104,7 +104,7 @@ func (pool *PackagePool) Open(path string) (aptly.ReadSeekerCloser, error) {
 	if err != nil {
 		return nil, errors.Wrapf(err, "error creating tempfile for %s", path)
 	}
-	defer os.Remove(temp.Name())
+	defer func () { _ = os.Remove(temp.Name()) }()
 
 	_, err = pool.az.client.DownloadFile(context.TODO(), pool.az.container, path, temp, nil)
 	if err != nil {
@@ -156,7 +156,7 @@ func (pool *PackagePool) Import(srcPath, basename string, checksums *utils.Check
 	if err != nil {
 		return "", err
 	}
-	defer source.Close()
+	defer func() { _ = source.Close() }()
 
 	err = pool.az.putFile(path, source, checksums.MD5)
 	if err != nil {

azure/package_pool_test.go

@@ -2,7 +2,7 @@ package azure
 
 import (
 	"context"
-	"io/ioutil"
+	"io"
 	"os"
 	"path/filepath"
 	"runtime"
@@ -69,8 +69,8 @@ func (s *PackagePoolSuite) TestFilepathList(c *C) {
 	c.Check(err, IsNil)
 	c.Check(list, DeepEquals, []string{})
 
-	s.pool.Import(s.debFile, "a.deb", &utils.ChecksumInfo{}, false, s.cs)
-	s.pool.Import(s.debFile, "b.deb", &utils.ChecksumInfo{}, false, s.cs)
+	_, _ = s.pool.Import(s.debFile, "a.deb", &utils.ChecksumInfo{}, false, s.cs)
+	_, _ = s.pool.Import(s.debFile, "b.deb", &utils.ChecksumInfo{}, false, s.cs)
 
 	list, err = s.pool.FilepathList(nil)
 	c.Check(err, IsNil)
@@ -81,8 +81,8 @@ func (s *PackagePoolSuite) TestFilepathList(c *C) {
 }
 
 func (s *PackagePoolSuite) TestRemove(c *C) {
-	s.pool.Import(s.debFile, "a.deb", &utils.ChecksumInfo{}, false, s.cs)
-	s.pool.Import(s.debFile, "b.deb", &utils.ChecksumInfo{}, false, s.cs)
+	_, _ = s.pool.Import(s.debFile, "a.deb", &utils.ChecksumInfo{}, false, s.cs)
+	_, _ = s.pool.Import(s.debFile, "b.deb", &utils.ChecksumInfo{}, false, s.cs)
 
 	size, err := s.pool.Remove("c7/6b/4bd12fd92e4dfe1b55b18a67a669_a.deb")
 	c.Check(err, IsNil)
@@ -247,7 +247,7 @@ func (s *PackagePoolSuite) TestOpen(c *C) {
 
 	f, err := s.pool.Open(path)
 	c.Assert(err, IsNil)
-	contents, err := ioutil.ReadAll(f)
+	contents, err := io.ReadAll(f)
 	c.Assert(err, IsNil)
 	c.Check(len(contents), Equals, 2738)
 	c.Check(f.Close(), IsNil)

azure/public.go

@@ -18,7 +18,7 @@ import (
 
 // PublishedStorage abstract file system with published files (actually hosted on Azure)
 type PublishedStorage struct {
-	prefix    string
+	// FIXME: unused ???? prefix    string
 	az        *azContext
 	pathCache map[string]map[string]string
 }
@@ -38,7 +38,7 @@ func NewPublishedStorage(accountName, accountKey, container, prefix, endpoint st
 	return &PublishedStorage{az: azctx}, nil
 }
 
-// String
+// String returns the storage as string
 func (storage *PublishedStorage) String() string {
 	return storage.az.String()
 }
@@ -65,7 +65,7 @@ func (storage *PublishedStorage) PutFile(path string, sourceFilename string) err
 	if err != nil {
 		return err
 	}
-	defer source.Close()
+	defer func() { _ = source.Close() }()
 
 	err = storage.az.putFile(path, source, sourceMD5)
 	if err != nil {
@@ -158,7 +158,7 @@ func (storage *PublishedStorage) LinkFromPool(publishedPrefix, publishedRelPath,
 	if err != nil {
 		return err
 	}
-	defer source.Close()
+	defer func() { _ = source.Close() }()
 
 	err = storage.az.putFile(relFilePath, source, sourceMD5)
 	if err == nil {
@@ -193,7 +193,9 @@ func (storage *PublishedStorage) internalCopyOrMoveBlob(src, dst string, metadat
 	if err != nil {
 		return fmt.Errorf("error acquiring lease on source blob %s", src)
 	}
-	defer blobLeaseClient.BreakLease(context.Background(), &lease.BlobBreakOptions{BreakPeriod: to.Ptr(int32(60))})
+	defer func() {
+		_, _ = blobLeaseClient.BreakLease(context.Background(), &lease.BlobBreakOptions{BreakPeriod: to.Ptr(int32(60))})
+	}()
 
 	dstBlobClient := containerClient.NewBlobClient(dst)
 	copyResp, err := dstBlobClient.StartCopyFromURL(context.Background(), srcBlobClient.URL(), &blob.StartCopyFromURLOptions{

azure/public_test.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"crypto/md5"
 	"crypto/rand"
-	"io/ioutil"
+	"io"
 	"os"
 	"path/filepath"
         "bytes"
@@ -36,7 +36,7 @@ func randString(n int) string {
 	}
 	const alphanum = "0123456789abcdefghijklmnopqrstuvwxyz"
 	var bytes = make([]byte, n)
-	rand.Read(bytes)
+	_, _ = rand.Read(bytes)
 	for i, b := range bytes {
 		bytes[i] = alphanum[b%byte(len(alphanum))]
 	}
@@ -87,7 +87,7 @@ func (s *PublishedStorageSuite) TearDownTest(c *C) {
 func (s *PublishedStorageSuite) GetFile(c *C, path string) []byte {
         resp, err := s.storage.az.client.DownloadStream(context.Background(), s.storage.az.container, path, nil)
 	c.Assert(err, IsNil)
-	data, err := ioutil.ReadAll(resp.Body)
+	data, err := io.ReadAll(resp.Body)
 	c.Assert(err, IsNil)
 	return data
 }
@@ -121,7 +121,7 @@ func (s *PublishedStorageSuite) TestPutFile(c *C) {
 	filename := "a/b.txt"
 
 	dir := c.MkDir()
-	err := ioutil.WriteFile(filepath.Join(dir, "a"), content, 0644)
+	err := os.WriteFile(filepath.Join(dir, "a"), content, 0644)
 	c.Assert(err, IsNil)
 
 	err = s.storage.PutFile(filename, filepath.Join(dir, "a"))
@@ -140,7 +140,7 @@ func (s *PublishedStorageSuite) TestPutFilePlus(c *C) {
 	filename := "a/b+c.txt"
 
 	dir := c.MkDir()
-	err := ioutil.WriteFile(filepath.Join(dir, "a"), content, 0644)
+	err := os.WriteFile(filepath.Join(dir, "a"), content, 0644)
 	c.Assert(err, IsNil)
 
 	err = s.storage.PutFile(filename, filepath.Join(dir, "a"))
@@ -258,7 +258,7 @@ func (s *PublishedStorageSuite) TestRemoveDirsPlus(c *C) {
 
 func (s *PublishedStorageSuite) TestRenameFile(c *C) {
 	dir := c.MkDir()
-	err := ioutil.WriteFile(filepath.Join(dir, "a"), []byte("Welcome to Azure!"), 0644)
+	err := os.WriteFile(filepath.Join(dir, "a"), []byte("Welcome to Azure!"), 0644)
 	c.Assert(err, IsNil)
 
 	err = s.storage.PutFile("source.txt", filepath.Join(dir, "a"))
@@ -280,18 +280,18 @@ func (s *PublishedStorageSuite) TestLinkFromPool(c *C) {
 	cs := files.NewMockChecksumStorage()
 
 	tmpFile1 := filepath.Join(c.MkDir(), "mars-invaders_1.03.deb")
-	err := ioutil.WriteFile(tmpFile1, []byte("Contents"), 0644)
+	err := os.WriteFile(tmpFile1, []byte("Contents"), 0644)
 	c.Assert(err, IsNil)
 	cksum1 := utils.ChecksumInfo{MD5: "c1df1da7a1ce305a3b60af9d5733ac1d"}
 
 	tmpFile2 := filepath.Join(c.MkDir(), "mars-invaders_1.03.deb")
-	err = ioutil.WriteFile(tmpFile2, []byte("Spam"), 0644)
+	err = os.WriteFile(tmpFile2, []byte("Spam"), 0644)
 	c.Assert(err, IsNil)
 	cksum2 := utils.ChecksumInfo{MD5: "e9dfd31cc505d51fc26975250750deab"}
 
 	tmpFile3 := filepath.Join(c.MkDir(), "netboot/boot.img.gz")
-	os.MkdirAll(filepath.Dir(tmpFile3), 0777)
-	err = ioutil.WriteFile(tmpFile3, []byte("Contents"), 0644)
+	_ = os.MkdirAll(filepath.Dir(tmpFile3), 0777)
+	err = os.WriteFile(tmpFile3, []byte("Contents"), 0644)
 	c.Assert(err, IsNil)
 	cksum3 := utils.ChecksumInfo{MD5: "c1df1da7a1ce305a3b60af9d5733ac1d"}