Revert "use new azure-sdk"

This reverts commit e2cbd637b8. # Conflicts: # azure/public.go # go.sum # Conflicts: # go.mod # go.sum
2026-01-11 03:11:50 +00:00 · 2025-01-12 00:09:12 +01:00
parent 96026eada8
commit 4ea1610c3a
7 changed files with 151 additions and 167 deletions
--- a/azure/azure.go
+++ b/azure/azure.go
@@ -5,35 +5,28 @@ package azure
 import (
 	"context"
 	"encoding/hex"
-	"errors"
 	"fmt"
 	"io"
-	"os"
+	"net/url"
 	"path/filepath"
 	"time"

-	"github.com/Azure/azure-sdk-for-go/sdk/azcore"
-	"github.com/Azure/azure-sdk-for-go/sdk/storage/azblob"
-	"github.com/Azure/azure-sdk-for-go/sdk/storage/azblob/blob"
+	"github.com/Azure/azure-storage-blob-go/azblob"
 	"github.com/aptly-dev/aptly/aptly"
 )

 func isBlobNotFound(err error) bool {
-	var respErr *azcore.ResponseError
-	if errors.As(err, &respErr) {
-		return respErr.StatusCode == 404 // BlobNotFound
-	}
-	return false
+	storageError, ok := err.(azblob.StorageError)
+	return ok && storageError.ServiceCode() == azblob.ServiceCodeBlobNotFound
 }

 type azContext struct {
-	client    *azblob.Client
-	container string
+	container azblob.ContainerURL
 	prefix    string
 }

 func newAzContext(accountName, accountKey, container, prefix, endpoint string) (*azContext, error) {
-	cred, err := azblob.NewSharedKeyCredential(accountName, accountKey)
+	credential, err := azblob.NewSharedKeyCredential(accountName, accountKey)
 	if err != nil {
 		return nil, err
 	}
@@ -42,14 +35,15 @@ func newAzContext(accountName, accountKey, container, prefix, endpoint string) (
 		endpoint = fmt.Sprintf("https://%s.blob.core.windows.net", accountName)
 	}

-	serviceClient, err := azblob.NewClientWithSharedKeyCredential(endpoint, cred, nil)
+	url, err := url.Parse(fmt.Sprintf("%s/%s", endpoint, container))
 	if err != nil {
 		return nil, err
 	}

+	containerURL := azblob.NewContainerURL(*url, azblob.NewPipeline(credential, azblob.PipelineOptions{}))
+
 	result := &azContext{
-		client:    serviceClient,
-		container: container,
+		container: containerURL,
 		prefix:    prefix,
 	}

@@ -60,6 +54,10 @@ func (az *azContext) blobPath(path string) string {
 	return filepath.Join(az.prefix, path)
 }

+func (az *azContext) blobURL(path string) azblob.BlobURL {
+	return az.container.NewBlobURL(az.blobPath(path))
+}
+
 func (az *azContext) internalFilelist(prefix string, progress aptly.Progress) (paths []string, md5s []string, err error) {
 	const delimiter = "/"
 	paths = make([]string, 0, 1024)
@@ -69,33 +67,27 @@ func (az *azContext) internalFilelist(prefix string, progress aptly.Progress) (p
 		prefix += delimiter
 	}

-	ctx := context.Background()
-	maxResults := int32(1)
-	pager := az.client.NewListBlobsFlatPager(az.container, &azblob.ListBlobsFlatOptions{
-		Prefix:     &prefix,
-		MaxResults: &maxResults,
-		Include:    azblob.ListBlobsInclude{Metadata: true},
-	})
-
-	// Iterate over each page
-	for pager.More() {
-		page, err := pager.NextPage(ctx)
+	for marker := (azblob.Marker{}); marker.NotDone(); {
+		listBlob, err := az.container.ListBlobsFlatSegment(
+			context.Background(), marker, azblob.ListBlobsSegmentOptions{
+				Prefix:     prefix,
+				MaxResults: 1,
+				Details:    azblob.BlobListingDetails{Metadata: true}})
 		if err != nil {
 			return nil, nil, fmt.Errorf("error listing under prefix %s in %s: %s", prefix, az, err)
 		}

-		for _, blob := range page.Segment.BlobItems {
-			if prefix == "" {
-				paths = append(paths, *blob.Name)
-			} else {
-				name := *blob.Name
-				paths = append(paths, name[len(prefix):])
-			}
-			b := *blob
-			md5 := b.Properties.ContentMD5
-			md5s = append(md5s, fmt.Sprintf("%x", md5))
+		marker = listBlob.NextMarker

+		for _, blob := range listBlob.Segment.BlobItems {
+			if prefix == "" {
+				paths = append(paths, blob.Name)
+			} else {
+				paths = append(paths, blob.Name[len(prefix):])
+			}
+			md5s = append(md5s, fmt.Sprintf("%x", blob.Properties.ContentMD5))
 		}
+
 		if progress != nil {
 			time.Sleep(time.Duration(500) * time.Millisecond)
 			progress.AddBar(1)
@@ -105,27 +97,28 @@ func (az *azContext) internalFilelist(prefix string, progress aptly.Progress) (p
 	return paths, md5s, nil
 }

-func (az *azContext) putFile(blobName string, source io.Reader, sourceMD5 string) error {
-	uploadOptions := &azblob.UploadFileOptions{
-		BlockSize:   4 * 1024 * 1024,
-		Concurrency: 8,
+func (az *azContext) putFile(blob azblob.BlobURL, source io.Reader, sourceMD5 string) error {
+	uploadOptions := azblob.UploadStreamToBlockBlobOptions{
+		BufferSize: 4 * 1024 * 1024,
+		MaxBuffers: 8,
 	}

-	path := az.blobPath(blobName)
 	if len(sourceMD5) > 0 {
 		decodedMD5, err := hex.DecodeString(sourceMD5)
 		if err != nil {
 			return err
 		}
-		uploadOptions.HTTPHeaders = &blob.HTTPHeaders{
-			BlobContentMD5: decodedMD5,
+		uploadOptions.BlobHTTPHeaders = azblob.BlobHTTPHeaders{
+			ContentMD5: decodedMD5,
 		}
 	}

-	var err error
-	if file, ok := source.(*os.File); ok {
-		_, err = az.client.UploadFile(context.TODO(), az.container, path, file, uploadOptions)
-	}
+	_, err := azblob.UploadStreamToBlockBlob(
+		context.Background(),
+		source,
+		blob.ToBlockBlobURL(),
+		uploadOptions,
+	)

 	return err
 }
--- a/azure/package_pool.go
+++ b/azure/package_pool.go
@@ -5,6 +5,7 @@ import (
 	"os"
 	"path/filepath"

+	"github.com/Azure/azure-storage-blob-go/azblob"
 	"github.com/aptly-dev/aptly/aptly"
 	"github.com/aptly-dev/aptly/utils"
 	"github.com/pkg/errors"
@@ -40,7 +41,10 @@ func (pool *PackagePool) buildPoolPath(filename string, checksums *utils.Checksu
 	return filepath.Join(hash[0:2], hash[2:4], hash[4:32]+"_"+filename)
 }

-func (pool *PackagePool) ensureChecksums(poolPath string, checksumStorage aptly.ChecksumStorage) (*utils.ChecksumInfo, error) {
+func (pool *PackagePool) ensureChecksums(
+	poolPath string,
+	checksumStorage aptly.ChecksumStorage,
+) (*utils.ChecksumInfo, error) {
 	targetChecksums, err := checksumStorage.Get(poolPath)
 	if err != nil {
 		return nil, err
@@ -48,7 +52,8 @@ func (pool *PackagePool) ensureChecksums(poolPath string, checksumStorage aptly.

 	if targetChecksums == nil {
 		// we don't have checksums stored yet for this file
-		download, err := pool.az.client.DownloadStream(context.Background(), pool.az.container, poolPath, nil)
+		blob := pool.az.blobURL(poolPath)
+		download, err := blob.Download(context.Background(), 0, 0, azblob.BlobAccessConditions{}, false, azblob.ClientProvidedKeyOptions{})
 		if err != nil {
 			if isBlobNotFound(err) {
 				return nil, nil
@@ -58,7 +63,7 @@ func (pool *PackagePool) ensureChecksums(poolPath string, checksumStorage aptly.
 		}

 		targetChecksums = &utils.ChecksumInfo{}
-		*targetChecksums, err = utils.ChecksumsForReader(download.Body)
+		*targetChecksums, err = utils.ChecksumsForReader(download.Body(azblob.RetryReaderOptions{}))
 		if err != nil {
 			return nil, errors.Wrapf(err, "error checksumming blob at %s", poolPath)
 		}
@@ -87,49 +92,46 @@ func (pool *PackagePool) LegacyPath(_ string, _ *utils.ChecksumInfo) (string, er
 }

 func (pool *PackagePool) Size(path string) (int64, error) {
-	serviceClient := pool.az.client.ServiceClient()
-	containerClient := serviceClient.NewContainerClient(pool.az.container)
-	blobClient := containerClient.NewBlobClient(path)
-
-	props, err := blobClient.GetProperties(context.TODO(), nil)
+	blob := pool.az.blobURL(path)
+	props, err := blob.GetProperties(context.Background(), azblob.BlobAccessConditions{}, azblob.ClientProvidedKeyOptions{})
 	if err != nil {
 		return 0, errors.Wrapf(err, "error examining %s from %s", path, pool)
 	}

-	return *props.ContentLength, nil
+	return props.ContentLength(), nil
 }

 func (pool *PackagePool) Open(path string) (aptly.ReadSeekerCloser, error) {
+	blob := pool.az.blobURL(path)
+
 	temp, err := os.CreateTemp("", "blob-download")
 	if err != nil {
-		return nil, errors.Wrapf(err, "error creating tempfile for %s", path)
+		return nil, errors.Wrap(err, "error creating temporary file for blob download")
 	}
+
 	defer os.Remove(temp.Name())

-	_, err = pool.az.client.DownloadFile(context.TODO(), pool.az.container, path, temp, nil)
+	err = azblob.DownloadBlobToFile(context.Background(), blob, 0, 0, temp, azblob.DownloadFromBlobOptions{})
 	if err != nil {
-		return nil, errors.Wrapf(err, "error downloading blob %s", path)
+		return nil, errors.Wrapf(err, "error downloading blob at %s", path)
 	}

 	return temp, nil
 }

 func (pool *PackagePool) Remove(path string) (int64, error) {
-	serviceClient := pool.az.client.ServiceClient()
-	containerClient := serviceClient.NewContainerClient(pool.az.container)
-	blobClient := containerClient.NewBlobClient(path)
-
-	props, err := blobClient.GetProperties(context.TODO(), nil)
+	blob := pool.az.blobURL(path)
+	props, err := blob.GetProperties(context.Background(), azblob.BlobAccessConditions{}, azblob.ClientProvidedKeyOptions{})
 	if err != nil {
-		return 0, errors.Wrapf(err, "error examining %s from %s", path, pool)
+		return 0, errors.Wrapf(err, "error getting props of %s from %s", path, pool)
 	}

-	_, err = pool.az.client.DeleteBlob(context.Background(), pool.az.container, path, nil)
+	_, err = blob.Delete(context.Background(), azblob.DeleteSnapshotsOptionNone, azblob.BlobAccessConditions{})
 	if err != nil {
 		return 0, errors.Wrapf(err, "error deleting %s from %s", path, pool)
 	}

-	return *props.ContentLength, nil
+	return props.ContentLength(), nil
 }

 func (pool *PackagePool) Import(srcPath, basename string, checksums *utils.ChecksumInfo, _ bool, checksumStorage aptly.ChecksumStorage) (string, error) {
@@ -143,6 +145,7 @@ func (pool *PackagePool) Import(srcPath, basename string, checksums *utils.Check
 	}

 	path := pool.buildPoolPath(basename, checksums)
+	blob := pool.az.blobURL(path)
 	targetChecksums, err := pool.ensureChecksums(path, checksumStorage)
 	if err != nil {
 		return "", err
@@ -158,7 +161,7 @@ func (pool *PackagePool) Import(srcPath, basename string, checksums *utils.Check
 	}
 	defer source.Close()

-	err = pool.az.putFile(path, source, checksums.MD5)
+	err = pool.az.putFile(blob, source, checksums.MD5)
 	if err != nil {
 		return "", err
 	}
--- a/azure/package_pool_test.go
+++ b/azure/package_pool_test.go
@@ -7,7 +7,7 @@ import (
 	"path/filepath"
 	"runtime"

-        "github.com/Azure/azure-sdk-for-go/sdk/storage/azblob"
+	"github.com/Azure/azure-storage-blob-go/azblob"
 	"github.com/aptly-dev/aptly/aptly"
 	"github.com/aptly-dev/aptly/files"
 	"github.com/aptly-dev/aptly/utils"
@@ -50,10 +50,8 @@ func (s *PackagePoolSuite) SetUpTest(c *C) {

 	s.pool, err = NewPackagePool(s.accountName, s.accountKey, container, "", s.endpoint)
 	c.Assert(err, IsNil)
-        publicAccessType := azblob.PublicAccessTypeContainer
-        _, err = s.pool.az.client.CreateContainer(context.TODO(), s.pool.az.container, &azblob.CreateContainerOptions{
-            Access: &publicAccessType,
-        })
+	cnt := s.pool.az.container
+	_, err = cnt.Create(context.Background(), azblob.Metadata{}, azblob.PublicAccessContainer)
 	c.Assert(err, IsNil)

 	s.prefixedPool, err = NewPackagePool(s.accountName, s.accountKey, container, prefix, s.endpoint)
--- a/azure/public.go
+++ b/azure/public.go
@@ -3,21 +3,20 @@ package azure
 import (
 	"context"
 	"fmt"
+	"net/http"
 	"os"
 	"path/filepath"
 	"time"

-	"github.com/Azure/azure-sdk-for-go/sdk/azcore/to"
-	"github.com/Azure/azure-sdk-for-go/sdk/storage/azblob/blob"
-	"github.com/Azure/azure-sdk-for-go/sdk/storage/azblob/lease"
+	"github.com/Azure/azure-storage-blob-go/azblob"
 	"github.com/aptly-dev/aptly/aptly"
 	"github.com/aptly-dev/aptly/utils"
-	"github.com/google/uuid"
 	"github.com/pkg/errors"
 )

 // PublishedStorage abstract file system with published files (actually hosted on Azure)
 type PublishedStorage struct {
+	container azblob.ContainerURL
 	prefix    string
 	az        *azContext
 	pathCache map[string]map[string]string
@@ -67,7 +66,7 @@ func (storage *PublishedStorage) PutFile(path string, sourceFilename string) err
 	}
 	defer source.Close()

-	err = storage.az.putFile(path, source, sourceMD5)
+	err = storage.az.putFile(storage.az.blobURL(path), source, sourceMD5)
 	if err != nil {
 		err = errors.Wrap(err, fmt.Sprintf("error uploading %s to %s", sourceFilename, storage))
 	}
@@ -77,15 +76,14 @@ func (storage *PublishedStorage) PutFile(path string, sourceFilename string) err

 // RemoveDirs removes directory structure under public path
 func (storage *PublishedStorage) RemoveDirs(path string, _ aptly.Progress) error {
-	path = storage.az.blobPath(path)
 	filelist, err := storage.Filelist(path)
 	if err != nil {
 		return err
 	}

 	for _, filename := range filelist {
-		blob := filepath.Join(path, filename)
-		_, err := storage.az.client.DeleteBlob(context.Background(), storage.az.container, blob, nil)
+		blob := storage.az.blobURL(filepath.Join(path, filename))
+		_, err := blob.Delete(context.Background(), azblob.DeleteSnapshotsOptionNone, azblob.BlobAccessConditions{})
 		if err != nil {
 			return fmt.Errorf("error deleting path %s from %s: %s", filename, storage, err)
 		}
@@ -96,8 +94,8 @@ func (storage *PublishedStorage) RemoveDirs(path string, _ aptly.Progress) error

 // Remove removes single file under public path
 func (storage *PublishedStorage) Remove(path string) error {
-	path = storage.az.blobPath(path)
-	_, err := storage.az.client.DeleteBlob(context.Background(), storage.az.container, path, nil)
+	blob := storage.az.blobURL(path)
+	_, err := blob.Delete(context.Background(), azblob.DeleteSnapshotsOptionNone, azblob.BlobAccessConditions{})
 	if err != nil {
 		err = errors.Wrap(err, fmt.Sprintf("error deleting %s from %s: %s", path, storage, err))
 	}
@@ -116,8 +114,9 @@ func (storage *PublishedStorage) LinkFromPool(publishedPrefix, publishedRelPath,
 	sourcePath string, sourceChecksums utils.ChecksumInfo, force bool) error {

 	relFilePath := filepath.Join(publishedRelPath, fileName)
-	prefixRelFilePath := filepath.Join(publishedPrefix, relFilePath)
-	poolPath := storage.az.blobPath(prefixRelFilePath)
+	// prefixRelFilePath := filepath.Join(publishedPrefix, relFilePath)
+	// FIXME: check how to integrate publishedPrefix:
+	poolPath := storage.az.blobPath(fileName)

 	if storage.pathCache == nil {
 		storage.pathCache = make(map[string]map[string]string)
@@ -160,7 +159,7 @@ func (storage *PublishedStorage) LinkFromPool(publishedPrefix, publishedRelPath,
 	}
 	defer source.Close()

-	err = storage.az.putFile(relFilePath, source, sourceMD5)
+	err = storage.az.putFile(storage.az.blobURL(relFilePath), source, sourceMD5)
 	if err == nil {
 		pathCache[relFilePath] = sourceMD5
 	} else {
@@ -177,58 +176,57 @@ func (storage *PublishedStorage) Filelist(prefix string) ([]string, error) {
 }

 // Internal copy or move implementation
-func (storage *PublishedStorage) internalCopyOrMoveBlob(src, dst string, metadata map[string]*string, move bool) error {
+func (storage *PublishedStorage) internalCopyOrMoveBlob(src, dst string, metadata azblob.Metadata, move bool) error {
 	const leaseDuration = 30
-	leaseID := uuid.NewString()

-	serviceClient := storage.az.client.ServiceClient()
-	containerClient := serviceClient.NewContainerClient(storage.az.container)
-	srcBlobClient := containerClient.NewBlobClient(src)
-	blobLeaseClient, err := lease.NewBlobClient(srcBlobClient, &lease.BlobClientOptions{LeaseID: to.Ptr(leaseID)})
-	if err != nil {
-		return fmt.Errorf("error acquiring lease on source blob %s", src)
+	dstBlobURL := storage.az.blobURL(dst)
+	srcBlobURL := storage.az.blobURL(src)
+	leaseResp, err := srcBlobURL.AcquireLease(context.Background(), "", leaseDuration, azblob.ModifiedAccessConditions{})
+	if err != nil || leaseResp.StatusCode() != http.StatusCreated {
+		return fmt.Errorf("error acquiring lease on source blob %s", srcBlobURL)
 	}
+	defer srcBlobURL.BreakLease(context.Background(), azblob.LeaseBreakNaturally, azblob.ModifiedAccessConditions{})
+	srcBlobLeaseID := leaseResp.LeaseID()

-	_, err = blobLeaseClient.AcquireLease(context.Background(), leaseDuration, nil)
-	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))})
-
-	dstBlobClient := containerClient.NewBlobClient(dst)
-	copyResp, err := dstBlobClient.StartCopyFromURL(context.Background(), srcBlobClient.URL(), &blob.StartCopyFromURLOptions{
-		Metadata: metadata,
-	})
-
+	copyResp, err := dstBlobURL.StartCopyFromURL(
+		context.Background(),
+		srcBlobURL.URL(),
+		metadata,
+		azblob.ModifiedAccessConditions{},
+		azblob.BlobAccessConditions{},
+		azblob.DefaultAccessTier,
+		nil)
 	if err != nil {
 		return fmt.Errorf("error copying %s -> %s in %s: %s", src, dst, storage, err)
 	}

-	copyStatus := *copyResp.CopyStatus
+	copyStatus := copyResp.CopyStatus()
 	for {
-		if copyStatus == blob.CopyStatusTypeSuccess {
+		if copyStatus == azblob.CopyStatusSuccess {
 			if move {
-				_, err := storage.az.client.DeleteBlob(context.Background(), storage.az.container, src, &blob.DeleteOptions{
-					AccessConditions: &blob.AccessConditions{
-						LeaseAccessConditions: &blob.LeaseAccessConditions{
-							LeaseID: &leaseID,
-						},
-					},
-				})
+				_, err = srcBlobURL.Delete(
+					context.Background(),
+					azblob.DeleteSnapshotsOptionNone,
+					azblob.BlobAccessConditions{
+						LeaseAccessConditions: azblob.LeaseAccessConditions{LeaseID: srcBlobLeaseID},
+					})
 				return err
 			}
 			return nil
-		} else if copyStatus == blob.CopyStatusTypePending {
+		} else if copyStatus == azblob.CopyStatusPending {
 			time.Sleep(1 * time.Second)
-			getMetadata, err := dstBlobClient.GetProperties(context.TODO(), nil)
+			blobPropsResp, err := dstBlobURL.GetProperties(
+				context.Background(),
+				azblob.BlobAccessConditions{LeaseAccessConditions: azblob.LeaseAccessConditions{LeaseID: srcBlobLeaseID}},
+				azblob.ClientProvidedKeyOptions{})
 			if err != nil {
-				return fmt.Errorf("error getting copy progress %s", dst)
+				return fmt.Errorf("error getting destination blob properties %s", dstBlobURL)
 			}
-			copyStatus = *getMetadata.CopyStatus
+			copyStatus = blobPropsResp.CopyStatus()

-			_, err = blobLeaseClient.RenewLease(context.Background(), nil)
+			_, err = srcBlobURL.RenewLease(context.Background(), srcBlobLeaseID, azblob.ModifiedAccessConditions{})
 			if err != nil {
-				return fmt.Errorf("error renewing source blob lease %s", src)
+				return fmt.Errorf("error renewing source blob lease %s", srcBlobURL)
 			}
 		} else {
 			return fmt.Errorf("error copying %s -> %s in %s: %s", dst, src, storage, copyStatus)
@@ -243,9 +241,7 @@ func (storage *PublishedStorage) RenameFile(oldName, newName string) error {

 // SymLink creates a copy of src file and adds link information as meta data
 func (storage *PublishedStorage) SymLink(src string, dst string) error {
-	metadata := make(map[string]*string)
-	metadata["SymLink"] = &src
-	return storage.internalCopyOrMoveBlob(src, dst, metadata, false /* do not remove src */)
+	return storage.internalCopyOrMoveBlob(src, dst, azblob.Metadata{"SymLink": src}, false /* move */)
 }

 // HardLink using symlink functionality as hard links do not exist
@@ -255,33 +251,28 @@ func (storage *PublishedStorage) HardLink(src string, dst string) error {

 // FileExists returns true if path exists
 func (storage *PublishedStorage) FileExists(path string) (bool, error) {
-	serviceClient := storage.az.client.ServiceClient()
-	containerClient := serviceClient.NewContainerClient(storage.az.container)
-	blobClient := containerClient.NewBlobClient(path)
-	_, err := blobClient.GetProperties(context.Background(), nil)
+	blob := storage.az.blobURL(path)
+	resp, err := blob.GetProperties(context.Background(), azblob.BlobAccessConditions{}, azblob.ClientProvidedKeyOptions{})
 	if err != nil {
 		if isBlobNotFound(err) {
 			return false, nil
 		}
-		return false, fmt.Errorf("error checking if blob %s exists: %v", path, err)
+		return false, err
+	} else if resp.StatusCode() == http.StatusOK {
+		return true, nil
 	}
-	return true, nil
+	return false, fmt.Errorf("error checking if blob %s exists %d", blob, resp.StatusCode())
 }

 // ReadLink returns the symbolic link pointed to by path.
 // This simply reads text file created with SymLink
 func (storage *PublishedStorage) ReadLink(path string) (string, error) {
-	serviceClient := storage.az.client.ServiceClient()
-	containerClient := serviceClient.NewContainerClient(storage.az.container)
-	blobClient := containerClient.NewBlobClient(path)
-	props, err := blobClient.GetProperties(context.Background(), nil)
+	blob := storage.az.blobURL(path)
+	resp, err := blob.GetProperties(context.Background(), azblob.BlobAccessConditions{}, azblob.ClientProvidedKeyOptions{})
 	if err != nil {
-		return "", fmt.Errorf("failed to get blob properties: %v", err)
+		return "", err
+	} else if resp.StatusCode() != http.StatusOK {
+		return "", fmt.Errorf("error checking if blob %s exists %d", blob, resp.StatusCode())
 	}
-
-	metadata := props.Metadata
-	if originalBlob, exists := metadata["original_blob"]; exists {
-		return *originalBlob, nil
-	}
-	return "", fmt.Errorf("error reading link %s: %v", path, err)
+	return resp.NewMetadata()["SymLink"], nil
 }
--- a/azure/public_test.go
+++ b/azure/public_test.go
@@ -7,11 +7,8 @@ import (
 	"io/ioutil"
 	"os"
 	"path/filepath"
-        "bytes"

-        "github.com/Azure/azure-sdk-for-go/sdk/azcore"
-        "github.com/Azure/azure-sdk-for-go/sdk/storage/azblob"
-        "github.com/Azure/azure-sdk-for-go/sdk/storage/azblob/blob"
+	"github.com/Azure/azure-storage-blob-go/azblob"
 	"github.com/aptly-dev/aptly/files"
 	"github.com/aptly-dev/aptly/utils"
 	. "gopkg.in/check.v1"
@@ -69,10 +66,8 @@ func (s *PublishedStorageSuite) SetUpTest(c *C) {

 	s.storage, err = NewPublishedStorage(s.accountName, s.accountKey, container, "", s.endpoint)
 	c.Assert(err, IsNil)
-        publicAccessType := azblob.PublicAccessTypeContainer
-        _, err = s.storage.az.client.CreateContainer(context.Background(), s.storage.az.container, &azblob.CreateContainerOptions{
-            Access: &publicAccessType,
-        })
+	cnt := s.storage.az.container
+	_, err = cnt.Create(context.Background(), azblob.Metadata{}, azblob.PublicAccessContainer)
 	c.Assert(err, IsNil)

 	s.prefixedStorage, err = NewPublishedStorage(s.accountName, s.accountKey, container, prefix, s.endpoint)
@@ -80,39 +75,41 @@ func (s *PublishedStorageSuite) SetUpTest(c *C) {
 }

 func (s *PublishedStorageSuite) TearDownTest(c *C) {
-        _, err := s.storage.az.client.DeleteContainer(context.Background(), s.storage.az.container, nil)
+	cnt := s.storage.az.container
+	_, err := cnt.Delete(context.Background(), azblob.ContainerAccessConditions{})
 	c.Assert(err, IsNil)
 }

 func (s *PublishedStorageSuite) GetFile(c *C, path string) []byte {
-        resp, err := s.storage.az.client.DownloadStream(context.Background(), s.storage.az.container, path, nil)
+	blob := s.storage.az.container.NewBlobURL(path)
+	resp, err := blob.Download(context.Background(), 0, azblob.CountToEnd, azblob.BlobAccessConditions{}, false, azblob.ClientProvidedKeyOptions{})
 	c.Assert(err, IsNil)
-	data, err := ioutil.ReadAll(resp.Body)
+	body := resp.Body(azblob.RetryReaderOptions{MaxRetryRequests: 3})
+	data, err := ioutil.ReadAll(body)
 	c.Assert(err, IsNil)
 	return data
 }

 func (s *PublishedStorageSuite) AssertNoFile(c *C, path string) {
-        serviceClient := s.storage.az.client.ServiceClient()
-        containerClient := serviceClient.NewContainerClient(s.storage.az.container)
-        blobClient := containerClient.NewBlobClient(path)
-        _, err := blobClient.GetProperties(context.Background(), nil)
+	_, err := s.storage.az.container.NewBlobURL(path).GetProperties(
+		context.Background(), azblob.BlobAccessConditions{}, azblob.ClientProvidedKeyOptions{})
 	c.Assert(err, NotNil)
-
-        storageError, ok := err.(*azcore.ResponseError)
+	storageError, ok := err.(azblob.StorageError)
 	c.Assert(ok, Equals, true)
-	c.Assert(storageError.StatusCode, Equals, 404)
+	c.Assert(string(storageError.ServiceCode()), Equals, string(string(azblob.StorageErrorCodeBlobNotFound)))
 }

 func (s *PublishedStorageSuite) PutFile(c *C, path string, data []byte) {
 	hash := md5.Sum(data)
-        uploadOptions := &azblob.UploadStreamOptions{
-            HTTPHeaders: &blob.HTTPHeaders{
-            	BlobContentMD5: hash[:],
-            },
-        }
-        reader := bytes.NewReader(data)
-        _, err := s.storage.az.client.UploadStream(context.Background(), s.storage.az.container, path, reader, uploadOptions)
+	_, err := azblob.UploadBufferToBlockBlob(
+		context.Background(),
+		data,
+		s.storage.az.container.NewBlockBlobURL(path),
+		azblob.UploadToBlockBlobOptions{
+			BlobHTTPHeaders: azblob.BlobHTTPHeaders{
+				ContentMD5: hash[:],
+			},
+		})
 	c.Assert(err, IsNil)
 }

@@ -333,7 +330,7 @@ func (s *PublishedStorageSuite) TestLinkFromPool(c *C) {

 	// 2nd link from pool, providing wrong path for source file
 	//
-	// this test should check that file already exists in Azure and skip upload (which would fail if not skipped)
+	// this test should check that file already exists in S3 and skip upload (which would fail if not skipped)
 	s.prefixedStorage.pathCache = nil
 	err = s.prefixedStorage.LinkFromPool("", filepath.Join("pool", "main", "m/mars-invaders"), "mars-invaders_1.03.deb", pool, "wrong-looks-like-pathcache-doesnt-work", cksum1, false)
 	c.Check(err, IsNil)
--- a/context/context.go
+++ b/context/context.go
@@ -100,6 +100,7 @@ func (context *AptlyContext) config() *utils.ConfigStructure {
 			configLocations := []string{homeLocation, "/usr/local/etc/aptly.conf", "/etc/aptly.conf"}

 			for _, configLocation := range configLocations {
+				// FIXME: check if exists, check if readable
 				err = utils.LoadConfig(configLocation, &utils.Config)
 				if os.IsPermission(err) || os.IsNotExist(err) {
 					continue
--- a/deb/list.go
+++ b/deb/list.go
@@ -598,6 +598,7 @@ func (l *PackageList) Filter(options FilterOptions) (*PackageList, error) {
 					//
 					// when follow-all-variants is enabled, we need to try to expand anyway,
 					// as even if dependency is satisfied now, there might be other ways to satisfy dependency
+					// FIXME: do not search twice
 					if result.Search(dep, false, true) != nil {
 						if options.DependencyOptions&DepVerboseResolve == DepVerboseResolve && options.Progress != nil {
 							options.Progress.ColoredPrintf("@{y}Already satisfied dependency@|: %s with %s", &dep, result.Search(dep, true, true))