Final round of updates, everything except mirror download should be ready

aptly/interfaces.go

@@ -44,6 +44,12 @@ type LocalPackagePool interface {
 	GenerateTempPath(filename string) (string, error)
 	// Link generates hardlink to destination path
 	Link(path, dstPath string) error
+	// Symlink generates symlink to destination path
+	Symlink(path, dstPath string) error
+	// FullPath generates full path to the file in pool
+	//
+	// Please use with care: it's not supposed to be used to access files
+	FullPath(path string) string
 }
 
 // PublishedStorage is abstraction of filesystem storing all published repositories

cmd/mirror_update.go

@@ -123,14 +123,14 @@ func aptlyMirrorUpdate(cmd *commander.Command, args []string) error {
 	ch := make(chan error, count)
 
 	// In separate goroutine (to avoid blocking main), push queue to downloader
-	go func() {
+	/*go func() {
 		for _, task := range queue {
 			context.Downloader().DownloadWithChecksum(repo.PackageURL(task.RepoURI).String(), task.DestinationPath, ch, task.Checksums, ignoreMismatch, maxTries)
 		}
 
 		// We don't need queue after this point
 		queue = nil
-	}()
+	}()*/
 
 	// Wait for all downloads to finish
 	var errors []string

cmd/package_show.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"os"
 
+	"github.com/smira/aptly/aptly"
 	"github.com/smira/aptly/deb"
 	"github.com/smira/aptly/query"
 	"github.com/smira/commander"
@@ -87,11 +88,17 @@ func aptlyPackageShow(cmd *commander.Command, args []string) error {
 
 		if withFiles {
 			fmt.Printf("Files in the pool:\n")
+			packagePool := context.PackagePool()
 			for _, f := range p.Files() {
-				path, err := context.PackagePool().Path(f.Filename, f.Checksums)
+				path, err := f.GetPoolPath(packagePool)
 				if err != nil {
 					return err
 				}
+
+				if pp, ok := packagePool.(aptly.LocalPackagePool); ok {
+					path = pp.FullPath(path)
+				}
+
 				fmt.Printf("  %s\n", path)
 			}
 			fmt.Printf("\n")

context/context.go

@@ -204,8 +204,7 @@ func (context *AptlyContext) Downloader() aptly.Downloader {
 		if downloadLimit == 0 {
 			downloadLimit = context.config().DownloadLimit
 		}
-		context.downloader = http.NewDownloader(context.config().DownloadConcurrency,
-			downloadLimit*1024, context._progress())
+		context.downloader = http.NewDownloader(downloadLimit*1024, context._progress())
 	}
 
 	return context.downloader
@@ -416,7 +415,6 @@ func (context *AptlyContext) Shutdown() {
 		context.database = nil
 	}
 	if context.downloader != nil {
-		context.downloader.Abort()
 		context.downloader = nil
 	}
 	if context.progress != nil {
@@ -431,7 +429,6 @@ func (context *AptlyContext) Cleanup() {
 	defer context.Unlock()
 
 	if context.downloader != nil {
-		context.downloader.Shutdown()
 		context.downloader = nil
 	}
 	if context.progress != nil {

deb/deb.go

@@ -12,7 +12,9 @@ import (
 
 	"github.com/h2non/filetype/matchers"
 	"github.com/mkrautz/goar"
+	"github.com/pkg/errors"
 
+	"github.com/smira/aptly/aptly"
 	"github.com/smira/aptly/utils"
 	"github.com/smira/go-xz"
 	"github.com/smira/lzma"
@@ -105,13 +107,7 @@ func GetControlFileFromDsc(dscFile string, verifier utils.Verifier) (Stanza, err
 }
 
 // GetContentsFromDeb returns list of files installed by .deb package
-func GetContentsFromDeb(packageFile string) ([]string, error) {
-	file, err := os.Open(packageFile)
-	if err != nil {
-		return nil, err
-	}
-	defer file.Close()
-
+func GetContentsFromDeb(file aptly.ReadSeekerCloser, packageFile string) ([]string, error) {
 	library := ar.NewReader(file)
 	for {
 		header, err := library.Next()
@@ -119,7 +115,7 @@ func GetContentsFromDeb(packageFile string) ([]string, error) {
 			return nil, fmt.Errorf("unable to find data.tar.* part in %s", packageFile)
 		}
 		if err != nil {
-			return nil, fmt.Errorf("unable to read .deb archive from %s: %s", packageFile, err)
+			return nil, errors.Wrapf(err, "unable to read .deb archive from %s", packageFile)
 		}
 
 		if strings.HasPrefix(header.Name, "data.tar") {
@@ -142,7 +138,7 @@ func GetContentsFromDeb(packageFile string) ([]string, error) {
 				} else {
 					ungzip, err := gzip.NewReader(bufReader)
 					if err != nil {
-						return nil, fmt.Errorf("unable to ungzip data.tar.gz from %s: %s", packageFile, err)
+						return nil, errors.Wrapf(err, "unable to ungzip data.tar.gz from %s", packageFile)
 					}
 					defer ungzip.Close()
 					tarInput = ungzip
@@ -152,7 +148,7 @@ func GetContentsFromDeb(packageFile string) ([]string, error) {
 			case "data.tar.xz":
 				unxz, err := xz.NewReader(bufReader)
 				if err != nil {
-					return nil, fmt.Errorf("unable to unxz data.tar.xz from %s: %s", packageFile, err)
+					return nil, errors.Wrapf(err, "unable to unxz data.tar.xz from %s", packageFile)
 				}
 				defer unxz.Close()
 				tarInput = unxz
@@ -172,7 +168,7 @@ func GetContentsFromDeb(packageFile string) ([]string, error) {
 					return results, nil
 				}
 				if err != nil {
-					return nil, fmt.Errorf("unable to read .tar archive from %s: %s", packageFile, err)
+					return nil, errors.Wrapf(err, "unable to read .tar archive from %s", packageFile)
 				}
 
 				if tarHeader.Typeflag == tar.TypeDir {

deb/deb_test.go

@@ -1,6 +1,7 @@
 package deb
 
 import (
+	"os"
 	"path/filepath"
 	"runtime"
 
@@ -59,13 +60,19 @@ func (s *DebSuite) TestGetControlFileFromDsc(c *C) {
 }
 
 func (s *DebSuite) TestGetContentsFromDeb(c *C) {
-	contents, err := GetContentsFromDeb(s.debFile)
+	f, err := os.Open(s.debFile)
+	c.Assert(err, IsNil)
+	contents, err := GetContentsFromDeb(f, s.debFile)
 	c.Check(err, IsNil)
 	c.Check(contents, DeepEquals, []string{"usr/share/doc/libboost-program-options-dev/changelog.gz",
 		"usr/share/doc/libboost-program-options-dev/copyright"})
+	c.Assert(f.Close(), IsNil)
 
-	contents, err = GetContentsFromDeb(s.debFile2)
+	f, err = os.Open(s.debFile2)
+	c.Assert(err, IsNil)
+	contents, err = GetContentsFromDeb(f, s.debFile2)
 	c.Check(err, IsNil)
 	c.Check(contents, DeepEquals, []string{"usr/bin/hardlink", "usr/share/man/man1/hardlink.1.gz",
 		"usr/share/doc/hardlink/changelog.gz", "usr/share/doc/hardlink/copyright", "usr/share/doc/hardlink/NEWS.Debian.gz"})
+	c.Assert(f.Close(), IsNil)
 }

deb/import.go

@@ -116,19 +116,24 @@ func ImportPackageFiles(list *PackageList, packageFiles []string, forceReplace b
 			continue
 		}
 
+		var files PackageFiles
+
+		if isSourcePackage {
+			files = p.Files()
+		}
+
 		var checksums utils.ChecksumInfo
 		checksums, err = utils.ChecksumsForFile(file)
 		if err != nil {
 			return nil, nil, err
 		}
 
-		if isSourcePackage {
-			p.UpdateFiles(append(p.Files(), PackageFile{Filename: filepath.Base(file), Checksums: checksums}))
-		} else {
-			p.UpdateFiles([]PackageFile{{Filename: filepath.Base(file), Checksums: checksums}})
+		mainPackageFile := PackageFile{
+			Filename:  filepath.Base(file),
+			Checksums: checksums,
 		}
 
-		err = pool.Import(file, checksums)
+		mainPackageFile.PoolPath, err = pool.Import(file, mainPackageFile.Filename, &mainPackageFile.Checksums, false)
 		if err != nil {
 			reporter.Warning("Unable to import file %s into pool: %s", file, err)
 			failedFiles = append(failedFiles, file)
@@ -137,13 +142,10 @@ func ImportPackageFiles(list *PackageList, packageFiles []string, forceReplace b
 
 		candidateProcessedFiles = append(candidateProcessedFiles, file)
 
-		// go over all files, except for the last one (.dsc/.deb itself)
-		for _, f := range p.Files() {
-			if filepath.Base(f.Filename) == filepath.Base(file) {
-				continue
-			}
+		// go over all the other files
+		for _, f := range files {
 			sourceFile := filepath.Join(filepath.Dir(file), filepath.Base(f.Filename))
-			err = pool.Import(sourceFile, f.Checksums)
+			f.PoolPath, err = pool.Import(sourceFile, f.Filename, &f.Checksums, false)
 			if err != nil {
 				reporter.Warning("Unable to import file %s into pool: %s", sourceFile, err)
 				failedFiles = append(failedFiles, file)
@@ -157,6 +159,8 @@ func ImportPackageFiles(list *PackageList, packageFiles []string, forceReplace b
 			continue
 		}
 
+		p.UpdateFiles(append(files, mainPackageFile))
+
 		if restriction != nil && !restriction.Matches(p) {
 			reporter.Warning("%s has been ignored as it doesn't match restriction", p)
 			failedFiles = append(failedFiles, file)

deb/package.go

@@ -418,7 +418,7 @@ func (p *Package) CalculateContents(packagePool aptly.PackagePool, progress aptl
 	}
 
 	file := p.Files()[0]
-	path, err := packagePool.Path(file.Filename, file.Checksums)
+	poolPath, err := file.GetPoolPath(packagePool)
 	if err != nil {
 		if progress != nil {
 			progress.ColoredPrintf("@y[!]@| @!Failed to build pool path: @| %s", err)
@@ -426,7 +426,16 @@ func (p *Package) CalculateContents(packagePool aptly.PackagePool, progress aptl
 		return nil, err
 	}
 
-	contents, err := GetContentsFromDeb(path)
+	reader, err := packagePool.Open(poolPath)
+	if err != nil {
+		if progress != nil {
+			progress.ColoredPrintf("@y[!]@| @!Failed to open package in pool: @| %s", err)
+		}
+		return nil, err
+	}
+	defer reader.Close()
+
+	contents, err := GetContentsFromDeb(reader, file.Filename)
 	if err != nil {
 		if progress != nil {
 			progress.ColoredPrintf("@y[!]@| @!Failed to generate package contents: @| %s", err)
@@ -547,7 +556,7 @@ func (p *Package) LinkFromPool(publishedStorage aptly.PublishedStorage, packageP
 	}
 
 	for i, f := range p.Files() {
-		sourcePath, err := packagePool.Path(f.Filename, f.Checksums)
+		sourcePoolPath, err := f.GetPoolPath(packagePool)
 		if err != nil {
 			return err
 		}
@@ -555,7 +564,7 @@ func (p *Package) LinkFromPool(publishedStorage aptly.PublishedStorage, packageP
 		relPath := filepath.Join("pool", component, poolDir)
 		publishedDirectory := filepath.Join(prefix, relPath)
 
-		err = publishedStorage.LinkFromPool(publishedDirectory, packagePool, sourcePath, f.Checksums, force)
+		err = publishedStorage.LinkFromPool(publishedDirectory, packagePool, sourcePoolPath, f.Checksums, force)
 		if err != nil {
 			return err
 		}
@@ -604,14 +613,9 @@ type PackageDownloadTask struct {
 // DownloadList returns list of missing package files for download in format
 // [[srcpath, dstpath]]
 func (p *Package) DownloadList(packagePool aptly.PackagePool) (result []PackageDownloadTask, err error) {
-	result = make([]PackageDownloadTask, 0, 1)
+	/*result = make([]PackageDownloadTask, 0, 1)
 
 	for _, f := range p.Files() {
-		poolPath, err := packagePool.Path(f.Filename, f.Checksums)
-		if err != nil {
-			return nil, err
-		}
-
 		verified, err := f.Verify(packagePool)
 		if err != nil {
 			return nil, err
@@ -622,7 +626,8 @@ func (p *Package) DownloadList(packagePool aptly.PackagePool) (result []PackageD
 		}
 	}
 
-	return result, nil
+	return result, nil*/
+	panic("NEEDS REWORK")
 }
 
 // VerifyFiles verifies that all package files have neen correctly downloaded
@@ -645,7 +650,7 @@ func (p *Package) FilepathList(packagePool aptly.PackagePool) ([]string, error)
 	result := make([]string, len(p.Files()))
 
 	for i, f := range p.Files() {
-		result[i], err = packagePool.RelativePath(f.Filename, f.Checksums)
+		result[i], err = f.GetPoolPath(packagePool)
 		if err != nil {
 			return nil, err
 		}

deb/package_files.go

@@ -4,7 +4,6 @@ import (
 	"encoding/binary"
 	"fmt"
 	"hash/fnv"
-	"os"
 	"path/filepath"
 	"sort"
 	"strconv"
@@ -20,18 +19,20 @@ type PackageFile struct {
 	Filename string
 	// Hashes for the file
 	Checksums utils.ChecksumInfo
+	// PoolPath persists relative path to file in the package pool
+	PoolPath string
 	// Temporary field used while downloading, stored relative path on the mirror
 	downloadPath string
 }
 
 // Verify that package file is present and correct
 func (f *PackageFile) Verify(packagePool aptly.PackagePool) (bool, error) {
-	poolPath, err := packagePool.Path(f.Filename, f.Checksums)
+	poolPath, err := f.GetPoolPath(packagePool)
 	if err != nil {
 		return false, err
 	}
 
-	st, err := os.Stat(poolPath)
+	st, err := packagePool.Stat(poolPath)
 	if err != nil {
 		return false, nil
 	}
@@ -41,6 +42,19 @@ func (f *PackageFile) Verify(packagePool aptly.PackagePool) (bool, error) {
 	return st.Size() == f.Checksums.Size, nil
 }
 
+// GetPoolPath returns path to the file in the pool
+//
+// For legacy packages which do not have PoolPath field set, that calculates LegacyPath via pool
+func (f *PackageFile) GetPoolPath(packagePool aptly.PackagePool) (string, error) {
+	var err error
+
+	if f.PoolPath == "" {
+		f.PoolPath, err = packagePool.LegacyPath(f.Filename, &f.Checksums)
+	}
+
+	return f.PoolPath, err
+}
+
 // DownloadURL return relative URL to package download location
 func (f *PackageFile) DownloadURL() string {
 	return filepath.Join(f.downloadPath, f.Filename)

deb/package_files_test.go

@@ -1,7 +1,7 @@
 package deb
 
 import (
-	"os"
+	"io/ioutil"
 	"path/filepath"
 
 	"github.com/smira/aptly/files"
@@ -30,19 +30,15 @@ func (s *PackageFilesSuite) SetUpTest(c *C) {
 
 func (s *PackageFilesSuite) TestVerify(c *C) {
 	packagePool := files.NewPackagePool(c.MkDir())
-	poolPath, _ := packagePool.Path(s.files[0].Filename, s.files[0].Checksums)
 
 	result, err := s.files[0].Verify(packagePool)
 	c.Check(err, IsNil)
 	c.Check(result, Equals, false)
 
-	err = os.MkdirAll(filepath.Dir(poolPath), 0755)
-	c.Assert(err, IsNil)
+	tmpFilepath := filepath.Join(c.MkDir(), "file")
+	c.Assert(ioutil.WriteFile(tmpFilepath, []byte("abcde"), 0777), IsNil)
 
-	file, err := os.Create(poolPath)
-	c.Assert(err, IsNil)
-	file.WriteString("abcde")
-	file.Close()
+	s.files[0].PoolPath, _ = packagePool.Import(tmpFilepath, s.files[0].Filename, &s.files[0].Checksums, false)
 
 	result, err = s.files[0].Verify(packagePool)
 	c.Check(err, IsNil)

deb/package_test.go

@@ -2,12 +2,11 @@ package deb
 
 import (
 	"bytes"
-	"os"
+	"io/ioutil"
 	"path/filepath"
 	"regexp"
 
 	"github.com/smira/aptly/files"
-	"github.com/smira/aptly/utils"
 
 	. "gopkg.in/check.v1"
 )
@@ -367,15 +366,12 @@ func (s *PackageSuite) TestLinkFromPool(c *C) {
 	publishedStorage := files.NewPublishedStorage(c.MkDir(), "", "")
 	p := NewPackageFromControlFile(s.stanza)
 
-	poolPath, _ := packagePool.Path(p.Files()[0].Filename, p.Files()[0].Checksums)
-	err := os.MkdirAll(filepath.Dir(poolPath), 0755)
-	c.Assert(err, IsNil)
+	tmpFilepath := filepath.Join(c.MkDir(), "file")
+	c.Assert(ioutil.WriteFile(tmpFilepath, nil, 0777), IsNil)
 
-	file, err := os.Create(poolPath)
-	c.Assert(err, IsNil)
-	file.Close()
+	p.Files()[0].PoolPath, _ = packagePool.Import(tmpFilepath, p.Files()[0].Filename, &p.Files()[0].Checksums, false)
 
-	err = p.LinkFromPool(publishedStorage, packagePool, "", "non-free", false)
+	err := p.LinkFromPool(publishedStorage, packagePool, "", "non-free", false)
 	c.Check(err, IsNil)
 	c.Check(p.Files()[0].Filename, Equals, "alien-arena-common_7.40-2_i386.deb")
 	c.Check(p.Files()[0].downloadPath, Equals, "pool/non-free/a/alien-arena")
@@ -396,48 +392,46 @@ func (s *PackageSuite) TestFilepathList(c *C) {
 }
 
 func (s *PackageSuite) TestDownloadList(c *C) {
-	packagePool := files.NewPackagePool(c.MkDir())
-	p := NewPackageFromControlFile(s.stanza)
-	p.Files()[0].Checksums.Size = 5
-	poolPath, _ := packagePool.Path(p.Files()[0].Filename, p.Files()[0].Checksums)
+	c.Fail()
+	/*
+		packagePool := files.NewPackagePool(c.MkDir())
+		p := NewPackageFromControlFile(s.stanza)
+		p.Files()[0].Checksums.Size = 5
+		poolPath, _ := packagePool.Path(p.Files()[0].Filename, p.Files()[0].Checksums)
 
-	list, err := p.DownloadList(packagePool)
-	c.Check(err, IsNil)
-	c.Check(list, DeepEquals, []PackageDownloadTask{
-		{
-			RepoURI:         "pool/contrib/a/alien-arena/alien-arena-common_7.40-2_i386.deb",
-			DestinationPath: poolPath,
-			Checksums: utils.ChecksumInfo{Size: 5,
-				MD5:    "1e8cba92c41420aa7baa8a5718d67122",
-				SHA1:   "46955e48cad27410a83740a21d766ce362364024",
-				SHA256: "eb4afb9885cba6dc70cccd05b910b2dbccc02c5900578be5e99f0d3dbf9d76a5"}}})
+		list, err := p.DownloadList(packagePool)
+		c.Check(err, IsNil)
+		c.Check(list, DeepEquals, []PackageDownloadTask{
+			{
+				RepoURI:         "pool/contrib/a/alien-arena/alien-arena-common_7.40-2_i386.deb",
+				DestinationPath: poolPath,
+				Checksums: utils.ChecksumInfo{Size: 5,
+					MD5:    "1e8cba92c41420aa7baa8a5718d67122",
+					SHA1:   "46955e48cad27410a83740a21d766ce362364024",
+					SHA256: "eb4afb9885cba6dc70cccd05b910b2dbccc02c5900578be5e99f0d3dbf9d76a5"}}})
 
-	err = os.MkdirAll(filepath.Dir(poolPath), 0755)
-	c.Assert(err, IsNil)
+		err = os.MkdirAll(filepath.Dir(poolPath), 0755)
+		c.Assert(err, IsNil)
 
-	file, err := os.Create(poolPath)
-	c.Assert(err, IsNil)
-	file.WriteString("abcde")
-	file.Close()
+		file, err := os.Create(poolPath)
+		c.Assert(err, IsNil)
+		file.WriteString("abcde")
+		file.Close()
 
-	list, err = p.DownloadList(packagePool)
-	c.Check(err, IsNil)
-	c.Check(list, DeepEquals, []PackageDownloadTask{})
+		list, err = p.DownloadList(packagePool)
+		c.Check(err, IsNil)
+		c.Check(list, DeepEquals, []PackageDownloadTask{})*/
 }
 
 func (s *PackageSuite) TestVerifyFiles(c *C) {
 	p := NewPackageFromControlFile(s.stanza)
 
 	packagePool := files.NewPackagePool(c.MkDir())
-	poolPath, _ := packagePool.Path(p.Files()[0].Filename, p.Files()[0].Checksums)
 
-	err := os.MkdirAll(filepath.Dir(poolPath), 0755)
-	c.Assert(err, IsNil)
+	tmpFilepath := filepath.Join(c.MkDir(), "file")
+	c.Assert(ioutil.WriteFile(tmpFilepath, []byte("abcde"), 0777), IsNil)
 
-	file, err := os.Create(poolPath)
-	c.Assert(err, IsNil)
-	file.WriteString("abcde")
-	file.Close()
+	p.Files()[0].PoolPath, _ = packagePool.Import(tmpFilepath, p.Files()[0].Filename, &p.Files()[0].Checksums, false)
 
 	result, err := p.VerifyFiles(packagePool)
 	c.Check(err, IsNil)

deb/publish_test.go

@@ -132,11 +132,10 @@ func (s *PublishedRepoSuite) SetUpTest(c *C) {
 	s.repo5, _ = NewPublishedRepo("files:other", "ppa", "maverick", []string{"source"}, []string{"main"}, []interface{}{s.localRepo}, s.factory)
 	s.repo5.SkipContents = true
 
-	poolPath, _ := s.packagePool.Path(s.p1.Files()[0].Filename, s.p1.Files()[0].Checksums)
-	err := os.MkdirAll(filepath.Dir(poolPath), 0755)
-	f, err := os.Create(poolPath)
-	c.Assert(err, IsNil)
-	f.Close()
+	tmpFilepath := filepath.Join(c.MkDir(), "file")
+	c.Assert(ioutil.WriteFile(tmpFilepath, nil, 0777), IsNil)
+
+	s.p1.Files()[0].PoolPath, _ = s.packagePool.Import(tmpFilepath, s.p1.Files()[0].Filename, &s.p1.Files()[0].Checksums, false)
 }
 
 func (s *PublishedRepoSuite) TearDownTest(c *C) {

files/package_pool.go

@@ -164,7 +164,7 @@ func (pool *PackagePool) Import(srcPath, basename string, checksums *utils.Check
 		}
 
 		// trying to overwrite file?
-		return "", fmt.Errorf("unable to import into pool: file %s already exists", poolPath)
+		return "", fmt.Errorf("unable to import into pool: file %s already exists", fullPoolPath)
 	}
 
 	if pool.supportLegacyPaths {
@@ -254,6 +254,18 @@ func (pool *PackagePool) Link(path, dstPath string) error {
 	return os.Link(filepath.Join(pool.rootPath, path), dstPath)
 }
 
+// Symlink generates symlink to destination path
+func (pool *PackagePool) Symlink(path, dstPath string) error {
+	return os.Symlink(filepath.Join(pool.rootPath, path), dstPath)
+}
+
+// FullPath generates full path to the file in pool
+//
+// Please use with care: it's not supposed to be used to access files
+func (pool *PackagePool) FullPath(path string) string {
+	return filepath.Join(pool.rootPath, path)
+}
+
 // GenerateTempPath generates temporary path for download (which is fast to import into package pool later on)
 func (pool *PackagePool) GenerateTempPath(filename string) (string, error) {
 	random := uuid.NewRandom().String()

files/package_pool_test.go

@@ -189,6 +189,24 @@ func (s *PackagePoolSuite) TestLink(c *C) {
 	c.Check(info.Sys().(*syscall.Stat_t).Nlink > 2, Equals, true)
 }
 
+func (s *PackagePoolSuite) TestSymlink(c *C) {
+	path, err := s.pool.Import(s.debFile, filepath.Base(s.debFile), &s.checksum, false)
+	c.Check(err, IsNil)
+
+	tmpDir := c.MkDir()
+	dstPath := filepath.Join(tmpDir, filepath.Base(s.debFile))
+	c.Check(s.pool.Symlink(path, dstPath), IsNil)
+
+	info, err := os.Stat(dstPath)
+	c.Assert(err, IsNil)
+	c.Check(info.Size(), Equals, int64(2738))
+	c.Check(info.Sys().(*syscall.Stat_t).Nlink > 2, Equals, true)
+
+	info, err = os.Lstat(dstPath)
+	c.Assert(err, IsNil)
+	c.Check(info.Sys().(*syscall.Stat_t).Mode&syscall.S_IFMT, Equals, uint16(syscall.S_IFLNK))
+}
+
 func (s *PackagePoolSuite) TestGenerateRandomPath(c *C) {
 	path, err := s.pool.GenerateTempPath("a.deb")
 	c.Check(err, IsNil)