Refactoring: new packages console, http, Progress is interface.

2026-01-11 03:11:50 +00:00 · 2014-02-19 13:08:55 +04:00
parent bd119dbfed
commit 2d589bd23d
18 changed files with 193 additions and 138 deletions
--- a/aptly/interfaces.go
+++ b/aptly/interfaces.go
@@ -4,6 +4,7 @@ package aptly

 import (
 	"github.com/smira/aptly/utils"
+	"io"
 	"os"
 )

@@ -13,7 +14,7 @@ import (
 type PackagePool interface {
 	Path(filename string, hashMD5 string) (string, error)
 	RelativePath(filename string, hashMD5 string) (string, error)
-	FilepathList(progress *utils.Progress) ([]string, error)
+	FilepathList(progress Progress) ([]string, error)
 	Remove(path string) (size int64, err error)
 }

@@ -26,3 +27,30 @@ type PublishedStorage interface {
 	LinkFromPool(prefix string, component string, poolDirectory string, sourcePool PackagePool, sourcePath string) (string, error)
 	ChecksumsForFile(path string) (utils.ChecksumInfo, error)
 }
+
+// Progress is a progress displaying entity, it allows progress bars & simple prints
+type Progress interface {
+	// Writer interface to support progress bar ticking
+	io.Writer
+	// Start makes progress start its work
+	Start()
+	// Shutdown shuts down progress display
+	Shutdown()
+	// InitBar starts progressbar for count bytes or count items
+	InitBar(count int64, isBytes bool)
+	// ShutdownBar stops progress bar and hides it
+	ShutdownBar()
+	// AddBar increments progress for progress bar
+	AddBar(count int)
+	// Printf does printf but in safe manner: not overwriting progress bar
+	Printf(msg string, a ...interface{})
+}
+
+// Downloader is parallel HTTP fetcher
+type Downloader interface {
+	Download(url string, destination string, result chan<- error)
+	DownloadWithChecksum(url string, destination string, result chan<- error, expected utils.ChecksumInfo, ignoreMismatch bool)
+	Pause()
+	Resume()
+	Shutdown()
+}
--- a/cmd_db_cleanup.go
+++ b/cmd_db_cleanup.go
@@ -20,7 +20,7 @@ func aptlyDbCleanup(cmd *commander.Command, args []string) error {
 	// collect information about references packages...
 	existingPackageRefs := debian.NewPackageRefList()

-	context.downloader.GetProgress().Printf("Loading mirrors and snapshots...\n")
+	context.progress.Printf("Loading mirrors and snapshots...\n")
 	repoCollection := debian.NewRemoteRepoCollection(context.database)
 	err = repoCollection.ForEach(func(repo *debian.RemoteRepo) error {
 		err := repoCollection.LoadComplete(repo)
@@ -48,14 +48,14 @@ func aptlyDbCleanup(cmd *commander.Command, args []string) error {
 	}

 	// ... and compare it to the list of all packages
-	context.downloader.GetProgress().Printf("Loading list of all packages...\n")
+	context.progress.Printf("Loading list of all packages...\n")
 	packageCollection := debian.NewPackageCollection(context.database)
 	allPackageRefs := packageCollection.AllPackageRefs()

 	toDelete := allPackageRefs.Substract(existingPackageRefs)

 	// delete packages that are no longer referenced
-	context.downloader.GetProgress().Printf("Deleting unreferenced packages (%d)...\n", toDelete.Len())
+	context.progress.Printf("Deleting unreferenced packages (%d)...\n", toDelete.Len())

 	context.database.StartBatch()
 	err = toDelete.ForEach(func(ref []byte) error {
@@ -71,9 +71,9 @@ func aptlyDbCleanup(cmd *commander.Command, args []string) error {
 	}

 	// now, build a list of files that should be present in Repository (package pool)
-	context.downloader.GetProgress().Printf("Building list of files referenced by packages...\n")
+	context.progress.Printf("Building list of files referenced by packages...\n")
 	referencedFiles := make([]string, 0, existingPackageRefs.Len())
-	context.downloader.GetProgress().InitBar(int64(existingPackageRefs.Len()), false)
+	context.progress.InitBar(int64(existingPackageRefs.Len()), false)

 	err = existingPackageRefs.ForEach(func(key []byte) error {
 		pkg, err := packageCollection.ByKey(key)
@@ -85,7 +85,7 @@ func aptlyDbCleanup(cmd *commander.Command, args []string) error {
 			return err
 		}
 		referencedFiles = append(referencedFiles, paths...)
-		context.downloader.GetProgress().AddBar(1)
+		context.progress.AddBar(1)

 		return nil
 	})
@@ -94,11 +94,11 @@ func aptlyDbCleanup(cmd *commander.Command, args []string) error {
 	}

 	sort.Strings(referencedFiles)
-	context.downloader.GetProgress().ShutdownBar()
+	context.progress.ShutdownBar()

 	// build a list of files in the package pool
-	context.downloader.GetProgress().Printf("Building list of files in package pool...\n")
-	existingFiles, err := context.packagePool.FilepathList(context.downloader.GetProgress())
+	context.progress.Printf("Building list of files in package pool...\n")
+	existingFiles, err := context.packagePool.FilepathList(context.progress)
 	if err != nil {
 		return fmt.Errorf("unable to collect file paths: %s", err)
 	}
@@ -107,10 +107,10 @@ func aptlyDbCleanup(cmd *commander.Command, args []string) error {
 	filesToDelete := utils.StrSlicesSubstract(existingFiles, referencedFiles)

 	// delete files that are no longer referenced
-	context.downloader.GetProgress().Printf("Deleting unreferenced files (%d)...\n", len(filesToDelete))
+	context.progress.Printf("Deleting unreferenced files (%d)...\n", len(filesToDelete))

 	if len(filesToDelete) > 0 {
-		context.downloader.GetProgress().InitBar(int64(len(filesToDelete)), false)
+		context.progress.InitBar(int64(len(filesToDelete)), false)
 		totalSize := int64(0)
 		for _, file := range filesToDelete {
 			size, err := context.packagePool.Remove(file)
@@ -118,12 +118,12 @@ func aptlyDbCleanup(cmd *commander.Command, args []string) error {
 				return err
 			}

-			context.downloader.GetProgress().AddBar(1)
+			context.progress.AddBar(1)
 			totalSize += size
 		}
-		context.downloader.GetProgress().ShutdownBar()
+		context.progress.ShutdownBar()

-		context.downloader.GetProgress().Printf("Disk space freed: %.2f GiB...\n", float64(totalSize)/1024.0/1024.0/1024.0)
+		context.progress.Printf("Disk space freed: %.2f GiB...\n", float64(totalSize)/1024.0/1024.0/1024.0)
 	}
 	return err
 }
--- a/cmd_mirror.go
+++ b/cmd_mirror.go
@@ -201,7 +201,7 @@ func aptlyMirrorUpdate(cmd *commander.Command, args []string) error {

 	packageCollection := debian.NewPackageCollection(context.database)

-	err = repo.Download(context.downloader, packageCollection, context.packagePool, ignoreMismatch)
+	err = repo.Download(context.progress, context.downloader, packageCollection, context.packagePool, ignoreMismatch)
 	if err != nil {
 		return fmt.Errorf("unable to update: %s", err)
 	}
--- a/console/progress.go
+++ b/console/progress.go
@@ -1,8 +1,9 @@
-package utils
+package console

 import (
 	"fmt"
 	"github.com/cheggaaa/pb"
+	"github.com/smira/aptly/aptly"
 )

 const (
@@ -26,6 +27,11 @@ type Progress struct {
 	barShown bool
 }

+// Check interface
+var (
+	_ aptly.Progress = (*Progress)(nil)
+)
+
 // NewProgress creates new progress instance
 func NewProgress() *Progress {
 	return &Progress{
@@ -47,7 +53,7 @@ func (p *Progress) Shutdown() {
 	<-p.stopped
 }

-// InitBar creates progressbar for count bytes
+// InitBar starts progressbar for count bytes or count items
 func (p *Progress) InitBar(count int64, isBytes bool) {
 	if p.bar != nil {
 		panic("bar already initialized")
--- a/console/terminal.go
+++ b/console/terminal.go
@@ -1,6 +1,6 @@
 // +build !freebsd

-package utils
+package console

 import (
 	"code.google.com/p/go.crypto/ssh/terminal"
--- a/console/terminal_bsd.go
+++ b/console/terminal_bsd.go
@@ -1,6 +1,6 @@
 // +build freebsd

-package utils
+package console

 // RunningOnTerminal checks whether stdout is terminal
 //
--- a/debian/debian.go
+++ b/debian/debian.go
@@ -0,0 +1,2 @@
+// Package debian implements Debian-specific repository handling
+package debian
--- a/debian/debian_test.go
+++ b/debian/debian_test.go
@@ -0,0 +1,11 @@
+package debian
+
+import (
+	. "launchpad.net/gocheck"
+	"testing"
+)
+
+// Launch gocheck tests
+func Test(t *testing.T) {
+	TestingT(t)
+}
--- a/debian/remote.go
+++ b/debian/remote.go
@@ -1,4 +1,3 @@
-// Package debian implements Debian-specific repository handling
 package debian

 import (
@@ -7,6 +6,7 @@ import (
 	"fmt"
 	"github.com/smira/aptly/aptly"
 	"github.com/smira/aptly/database"
+	"github.com/smira/aptly/http"
 	"github.com/smira/aptly/utils"
 	"github.com/ugorji/go/codec"
 	"log"
@@ -162,7 +162,7 @@ func (repo *RemoteRepo) PackageURL(filename string) *url.URL {
 }

 // Fetch updates information about repository
-func (repo *RemoteRepo) Fetch(d utils.Downloader, verifier utils.Verifier) error {
+func (repo *RemoteRepo) Fetch(d aptly.Downloader, verifier utils.Verifier) error {
 	var (
 		release *os.File
 		err     error
@@ -170,13 +170,13 @@ func (repo *RemoteRepo) Fetch(d utils.Downloader, verifier utils.Verifier) error

 	if verifier == nil {
 		// 0. Just download release file to temporary URL
-		release, err = utils.DownloadTemp(d, repo.ReleaseURL("Release").String())
+		release, err = http.DownloadTemp(d, repo.ReleaseURL("Release").String())
 		if err != nil {
 			return err
 		}
 	} else {
 		// 1. try InRelease file
-		inrelease, err := utils.DownloadTemp(d, repo.ReleaseURL("InRelease").String())
+		inrelease, err := http.DownloadTemp(d, repo.ReleaseURL("InRelease").String())
 		if err != nil {
 			goto splitsignature
 		}
@@ -191,12 +191,12 @@ func (repo *RemoteRepo) Fetch(d utils.Downloader, verifier utils.Verifier) error

 	splitsignature:
 		// 2. try Release + Release.gpg
-		release, err = utils.DownloadTemp(d, repo.ReleaseURL("Release").String())
+		release, err = http.DownloadTemp(d, repo.ReleaseURL("Release").String())
 		if err != nil {
 			return err
 		}

-		releasesig, err := utils.DownloadTemp(d, repo.ReleaseURL("Release.gpg").String())
+		releasesig, err := http.DownloadTemp(d, repo.ReleaseURL("Release.gpg").String())
 		if err != nil {
 			return err
 		}
@@ -298,10 +298,10 @@ ok:
 }

 // Download downloads all repo files
-func (repo *RemoteRepo) Download(d utils.Downloader, packageCollection *PackageCollection, packagePool aptly.PackagePool, ignoreMismatch bool) error {
+func (repo *RemoteRepo) Download(progress aptly.Progress, d aptly.Downloader, packageCollection *PackageCollection, packagePool aptly.PackagePool, ignoreMismatch bool) error {
 	list := NewPackageList()

-	d.GetProgress().Printf("Downloading & parsing package files...\n")
+	progress.Printf("Downloading & parsing package files...\n")

 	// Download and parse all Packages & Source files
 	packagesURLs := [][]string{}
@@ -324,7 +324,7 @@ func (repo *RemoteRepo) Download(d utils.Downloader, packageCollection *PackageC

 	for _, info := range packagesURLs {
 		url, kind := info[0], info[1]
-		packagesReader, packagesFile, err := utils.DownloadTryCompression(d, url, repo.ReleaseFiles, ignoreMismatch)
+		packagesReader, packagesFile, err := http.DownloadTryCompression(d, url, repo.ReleaseFiles, ignoreMismatch)
 		if err != nil {
 			return err
 		}
@@ -355,16 +355,16 @@ func (repo *RemoteRepo) Download(d utils.Downloader, packageCollection *PackageC
 		}
 	}

-	d.GetProgress().Printf("Saving packages to database...\n")
+	progress.Printf("Saving packages to database...\n")

-	d.GetProgress().InitBar(int64(list.Len()), false)
+	progress.InitBar(int64(list.Len()), false)

 	packageCollection.db.StartBatch()
 	count := 0

 	// Save package meta information to DB
 	err := list.ForEach(func(p *Package) error {
-		d.GetProgress().AddBar(1)
+		progress.AddBar(1)
 		count++
 		if count > 1000 {
 			count = 0
@@ -385,9 +385,9 @@ func (repo *RemoteRepo) Download(d utils.Downloader, packageCollection *PackageC
 		return fmt.Errorf("unable to save packages to db: %s", err)
 	}

-	d.GetProgress().ShutdownBar()
+	progress.ShutdownBar()

-	d.GetProgress().Printf("Building download queue...\n")
+	progress.Printf("Building download queue...\n")

 	// Build download queue
 	queued := make(map[string]PackageDownloadTask, list.Len())
@@ -420,9 +420,9 @@ func (repo *RemoteRepo) Download(d utils.Downloader, packageCollection *PackageC
 	// free up package list, we don't need it after this point
 	list = nil

-	d.GetProgress().Printf("Download queue: %d items, %.2f GiB size\n", count, float64(downloadSize)/(1024.0*1024.0*1024.0))
+	progress.Printf("Download queue: %d items, %.2f GiB size\n", count, float64(downloadSize)/(1024.0*1024.0*1024.0))

-	d.GetProgress().InitBar(downloadSize, true)
+	progress.InitBar(downloadSize, true)

 	// Download all package files
 	ch := make(chan error, len(queued))
@@ -445,7 +445,7 @@ func (repo *RemoteRepo) Download(d utils.Downloader, packageCollection *PackageC
 		count--
 	}

-	d.GetProgress().ShutdownBar()
+	progress.ShutdownBar()

 	if len(errors) > 0 {
 		return fmt.Errorf("download errors:\n  %s\n", strings.Join(errors, "\n  "))
--- a/debian/remote_test.go
+++ b/debian/remote_test.go
@@ -3,21 +3,17 @@ package debian
 import (
 	"errors"
 	"github.com/smira/aptly/aptly"
+	"github.com/smira/aptly/console"
 	"github.com/smira/aptly/database"
 	"github.com/smira/aptly/files"
+	"github.com/smira/aptly/http"
 	"github.com/smira/aptly/utils"
 	"io"
 	"io/ioutil"
 	. "launchpad.net/gocheck"
 	"os"
-	"testing"
 )

-// Launch gocheck tests
-func Test(t *testing.T) {
-	TestingT(t)
-}
-
 type NullVerifier struct {
 }

@@ -69,7 +65,8 @@ type RemoteRepoSuite struct {
 	PackageListMixinSuite
 	repo              *RemoteRepo
 	flat              *RemoteRepo
-	downloader        *utils.FakeDownloader
+	downloader        *http.FakeDownloader
+	progress          aptly.Progress
 	db                database.Storage
 	packageCollection *PackageCollection
 	packagePool       aptly.PackagePool
@@ -80,14 +77,17 @@ var _ = Suite(&RemoteRepoSuite{})
 func (s *RemoteRepoSuite) SetUpTest(c *C) {
 	s.repo, _ = NewRemoteRepo("yandex", "http://mirror.yandex.ru/debian/", "squeeze", []string{"main"}, []string{}, false)
 	s.flat, _ = NewRemoteRepo("exp42", "http://repos.express42.com/virool/precise/", "./", []string{}, []string{}, false)
-	s.downloader = utils.NewFakeDownloader().ExpectResponse("http://mirror.yandex.ru/debian/dists/squeeze/Release", exampleReleaseFile)
+	s.downloader = http.NewFakeDownloader().ExpectResponse("http://mirror.yandex.ru/debian/dists/squeeze/Release", exampleReleaseFile)
+	s.progress = console.NewProgress()
 	s.db, _ = database.OpenDB(c.MkDir())
 	s.packageCollection = NewPackageCollection(s.db)
 	s.packagePool = files.NewPackagePool(c.MkDir())
 	s.SetUpPackages()
+	s.progress.Start()
 }

 func (s *RemoteRepoSuite) TearDownTest(c *C) {
+	s.progress.Shutdown()
 	s.db.Close()
 }

@@ -176,7 +176,7 @@ func (s *RemoteRepoSuite) TestFetch(c *C) {
 }

 func (s *RemoteRepoSuite) TestFetchNullVerifier1(c *C) {
-	downloader := utils.NewFakeDownloader()
+	downloader := http.NewFakeDownloader()
 	downloader.ExpectError("http://mirror.yandex.ru/debian/dists/squeeze/InRelease", errors.New("404"))
 	downloader.ExpectResponse("http://mirror.yandex.ru/debian/dists/squeeze/Release", exampleReleaseFile)
 	downloader.ExpectResponse("http://mirror.yandex.ru/debian/dists/squeeze/Release.gpg", "GPG")
@@ -189,7 +189,7 @@ func (s *RemoteRepoSuite) TestFetchNullVerifier1(c *C) {
 }

 func (s *RemoteRepoSuite) TestFetchNullVerifier2(c *C) {
-	downloader := utils.NewFakeDownloader()
+	downloader := http.NewFakeDownloader()
 	downloader.ExpectResponse("http://mirror.yandex.ru/debian/dists/squeeze/InRelease", exampleReleaseFile)

 	err := s.repo.Fetch(downloader, &NullVerifier{})
@@ -242,7 +242,7 @@ func (s *RemoteRepoSuite) TestDownload(c *C) {
 	s.downloader.ExpectResponse("http://mirror.yandex.ru/debian/dists/squeeze/main/binary-i386/Packages", examplePackagesFile)
 	s.downloader.ExpectResponse("http://mirror.yandex.ru/debian/pool/main/a/amanda/amanda-client_3.3.1-3~bpo60+1_amd64.deb", "xyz")

-	err = s.repo.Download(s.downloader, s.packageCollection, s.packagePool, false)
+	err = s.repo.Download(s.progress, s.downloader, s.packageCollection, s.packagePool, false)
 	c.Assert(err, IsNil)
 	c.Assert(s.downloader.Empty(), Equals, true)
 	c.Assert(s.repo.packageRefs, NotNil)
@@ -275,7 +275,7 @@ func (s *RemoteRepoSuite) TestDownloadWithSources(c *C) {
 	s.downloader.AnyExpectResponse("http://mirror.yandex.ru/debian/pool/main/a/access-modifier-checker/access-modifier-checker_1.0.orig.tar.gz", "abcd")
 	s.downloader.AnyExpectResponse("http://mirror.yandex.ru/debian/pool/main/a/access-modifier-checker/access-modifier-checker_1.0-4.debian.tar.gz", "abcde")

-	err = s.repo.Download(s.downloader, s.packageCollection, s.packagePool, false)
+	err = s.repo.Download(s.progress, s.downloader, s.packageCollection, s.packagePool, false)
 	c.Assert(err, IsNil)
 	c.Assert(s.downloader.Empty(), Equals, true)
 	c.Assert(s.repo.packageRefs, NotNil)
@@ -300,7 +300,7 @@ func (s *RemoteRepoSuite) TestDownloadWithSources(c *C) {
 }

 func (s *RemoteRepoSuite) TestDownloadFlat(c *C) {
-	downloader := utils.NewFakeDownloader()
+	downloader := http.NewFakeDownloader()
 	downloader.ExpectResponse("http://repos.express42.com/virool/precise/Release", exampleReleaseFile)
 	downloader.ExpectError("http://repos.express42.com/virool/precise/Packages.bz2", errors.New("HTTP 404"))
 	downloader.ExpectError("http://repos.express42.com/virool/precise/Packages.gz", errors.New("HTTP 404"))
@@ -310,7 +310,7 @@ func (s *RemoteRepoSuite) TestDownloadFlat(c *C) {
 	err := s.flat.Fetch(downloader, nil)
 	c.Assert(err, IsNil)

-	err = s.flat.Download(downloader, s.packageCollection, s.packagePool, false)
+	err = s.flat.Download(s.progress, downloader, s.packageCollection, s.packagePool, false)
 	c.Assert(err, IsNil)
 	c.Assert(downloader.Empty(), Equals, true)
 	c.Assert(s.flat.packageRefs, NotNil)
@@ -328,7 +328,7 @@ func (s *RemoteRepoSuite) TestDownloadFlat(c *C) {
 func (s *RemoteRepoSuite) TestDownloadWithSourcesFlat(c *C) {
 	s.flat.DownloadSources = true

-	downloader := utils.NewFakeDownloader()
+	downloader := http.NewFakeDownloader()
 	downloader.ExpectResponse("http://repos.express42.com/virool/precise/Release", exampleReleaseFile)
 	downloader.ExpectError("http://repos.express42.com/virool/precise/Packages.bz2", errors.New("HTTP 404"))
 	downloader.ExpectError("http://repos.express42.com/virool/precise/Packages.gz", errors.New("HTTP 404"))
@@ -344,7 +344,7 @@ func (s *RemoteRepoSuite) TestDownloadWithSourcesFlat(c *C) {
 	err := s.flat.Fetch(downloader, nil)
 	c.Assert(err, IsNil)

-	err = s.flat.Download(downloader, s.packageCollection, s.packagePool, false)
+	err = s.flat.Download(s.progress, downloader, s.packageCollection, s.packagePool, false)
 	c.Assert(err, IsNil)
 	c.Assert(downloader.Empty(), Equals, true)
 	c.Assert(s.flat.packageRefs, NotNil)
--- a/utils/download.go
+++ b/utils/download.go
@@ -1,9 +1,11 @@
-package utils
+package http

 import (
 	"compress/bzip2"
 	"compress/gzip"
 	"fmt"
+	"github.com/smira/aptly/aptly"
+	"github.com/smira/aptly/utils"
 	"io"
 	"io/ioutil"
 	"net/http"
@@ -12,19 +14,9 @@ import (
 	"strings"
 )

-// Downloader is parallel HTTP fetcher
-type Downloader interface {
-	Download(url string, destination string, result chan<- error)
-	DownloadWithChecksum(url string, destination string, result chan<- error, expected ChecksumInfo, ignoreMismatch bool)
-	Pause()
-	Resume()
-	Shutdown()
-	GetProgress() *Progress
-}
-
 // Check interface
 var (
-	_ Downloader = &downloaderImpl{}
+	_ aptly.Downloader = (*downloaderImpl)(nil)
 )

 // downloaderImpl is implementation of Downloader interface
@@ -34,7 +26,7 @@ type downloaderImpl struct {
 	stopped  chan bool
 	pause    chan bool
 	unpause  chan bool
-	progress *Progress
+	progress aptly.Progress
 	threads  int
 }

@@ -43,13 +35,13 @@ type downloadTask struct {
 	url            string
 	destination    string
 	result         chan<- error
-	expected       ChecksumInfo
+	expected       utils.ChecksumInfo
 	ignoreMismatch bool
 }

 // NewDownloader creates new instance of Downloader which specified number
 // of threads
-func NewDownloader(threads int) Downloader {
+func NewDownloader(threads int, progress aptly.Progress) aptly.Downloader {
 	downloader := &downloaderImpl{
 		queue:    make(chan *downloadTask, 1000),
 		stop:     make(chan bool),
@@ -57,11 +49,9 @@ func NewDownloader(threads int) Downloader {
 		pause:    make(chan bool),
 		unpause:  make(chan bool),
 		threads:  threads,
-		progress: NewProgress(),
+		progress: progress,
 	}

-	downloader.progress.Start()
-
 	for i := 0; i < downloader.threads; i++ {
 		go downloader.process()
 	}
@@ -79,8 +69,6 @@ func (downloader *downloaderImpl) Shutdown() {
 	for i := 0; i < downloader.threads; i++ {
 		<-downloader.stopped
 	}
-
-	downloader.progress.Shutdown()
 }

 // Pause pauses task processing
@@ -97,19 +85,14 @@ func (downloader *downloaderImpl) Resume() {
 	}
 }

-// Resume resumes task processing
-func (downloader *downloaderImpl) GetProgress() *Progress {
-	return downloader.progress
-}
-
 // Download starts new download task
 func (downloader *downloaderImpl) Download(url string, destination string, result chan<- error) {
-	downloader.DownloadWithChecksum(url, destination, result, ChecksumInfo{Size: -1}, false)
+	downloader.DownloadWithChecksum(url, destination, result, utils.ChecksumInfo{Size: -1}, false)
 }

 // DownloadWithChecksum starts new download task with checksum verification
 func (downloader *downloaderImpl) DownloadWithChecksum(url string, destination string, result chan<- error,
-	expected ChecksumInfo, ignoreMismatch bool) {
+	expected utils.ChecksumInfo, ignoreMismatch bool) {
 	downloader.queue <- &downloadTask{url: url, destination: destination, result: result, expected: expected, ignoreMismatch: ignoreMismatch}
 }

@@ -144,17 +127,13 @@ func (downloader *downloaderImpl) handleTask(task *downloadTask) {
 	}
 	defer outfile.Close()

-	checksummer := NewChecksumWriter()
-	writers := []io.Writer{outfile}
+	checksummer := utils.NewChecksumWriter()
+	writers := []io.Writer{outfile, downloader.progress}

 	if task.expected.Size != -1 {
 		writers = append(writers, checksummer)
 	}

-	if downloader.progress != nil {
-		writers = append(writers, downloader.progress)
-	}
-
 	w := io.MultiWriter(writers...)

 	_, err = io.Copy(w, resp.Body)
@@ -216,14 +195,14 @@ func (downloader *downloaderImpl) process() {
 // DownloadTemp starts new download to temporary file and returns File
 //
 // Temporary file would be already removed, so no need to cleanup
-func DownloadTemp(downloader Downloader, url string) (*os.File, error) {
-	return DownloadTempWithChecksum(downloader, url, ChecksumInfo{Size: -1}, false)
+func DownloadTemp(downloader aptly.Downloader, url string) (*os.File, error) {
+	return DownloadTempWithChecksum(downloader, url, utils.ChecksumInfo{Size: -1}, false)
 }

 // DownloadTempWithChecksum is a DownloadTemp with checksum verification
 //
 // Temporary file would be already removed, so no need to cleanup
-func DownloadTempWithChecksum(downloader Downloader, url string, expected ChecksumInfo, ignoreMismatch bool) (*os.File, error) {
+func DownloadTempWithChecksum(downloader aptly.Downloader, url string, expected utils.ChecksumInfo, ignoreMismatch bool) (*os.File, error) {
 	tempdir, err := ioutil.TempDir(os.TempDir(), "aptly")
 	if err != nil {
 		return nil, err
@@ -269,7 +248,7 @@ var compressionMethods = []struct {

 // DownloadTryCompression tries to download from URL .bz2, .gz and raw extension until
 // it finds existing file.
-func DownloadTryCompression(downloader Downloader, url string, expectedChecksums map[string]ChecksumInfo, ignoreMismatch bool) (io.Reader, *os.File, error) {
+func DownloadTryCompression(downloader aptly.Downloader, url string, expectedChecksums map[string]utils.ChecksumInfo, ignoreMismatch bool) (io.Reader, *os.File, error) {
 	var err error

 	for _, method := range compressionMethods {
--- a/utils/download_test.go
+++ b/utils/download_test.go
@@ -1,8 +1,11 @@
-package utils
+package http

 import (
 	"errors"
 	"fmt"
+	"github.com/smira/aptly/aptly"
+	"github.com/smira/aptly/console"
+	"github.com/smira/aptly/utils"
 	"io"
 	"io/ioutil"
 	. "launchpad.net/gocheck"
@@ -10,20 +13,15 @@ import (
 	"net/http"
 	"os"
 	"runtime"
-	"testing"
 	"time"
 )

-// Launch gocheck tests
-func Test(t *testing.T) {
-	TestingT(t)
-}
-
 type DownloaderSuite struct {
 	tempfile *os.File
 	l        net.Listener
 	url      string
 	ch       chan bool
+	progress aptly.Progress
 }

 var _ = Suite(&DownloaderSuite{})
@@ -44,9 +42,14 @@ func (s *DownloaderSuite) SetUpTest(c *C) {
 		http.Serve(s.l, mux)
 		s.ch <- true
 	}()
+
+	s.progress = console.NewProgress()
+	s.progress.Start()
 }

 func (s *DownloaderSuite) TearDownTest(c *C) {
+	s.progress.Shutdown()
+
 	s.l.Close()
 	<-s.ch

@@ -57,7 +60,7 @@ func (s *DownloaderSuite) TearDownTest(c *C) {
 func (s *DownloaderSuite) TestStartupShutdown(c *C) {
 	goroutines := runtime.NumGoroutine()

-	d := NewDownloader(10)
+	d := NewDownloader(10, s.progress)
 	d.Shutdown()

 	// wait for goroutines to shutdown
@@ -69,7 +72,7 @@ func (s *DownloaderSuite) TestStartupShutdown(c *C) {
 }

 func (s *DownloaderSuite) TestPauseResume(c *C) {
-	d := NewDownloader(2)
+	d := NewDownloader(2, s.progress)
 	defer d.Shutdown()

 	d.Pause()
@@ -77,7 +80,7 @@ func (s *DownloaderSuite) TestPauseResume(c *C) {
 }

 func (s *DownloaderSuite) TestDownloadOK(c *C) {
-	d := NewDownloader(2)
+	d := NewDownloader(2, s.progress)
 	defer d.Shutdown()
 	ch := make(chan error)

@@ -87,48 +90,48 @@ func (s *DownloaderSuite) TestDownloadOK(c *C) {
 }

 func (s *DownloaderSuite) TestDownloadWithChecksum(c *C) {
-	d := NewDownloader(2)
+	d := NewDownloader(2, s.progress)
 	defer d.Shutdown()
 	ch := make(chan error)

-	d.DownloadWithChecksum(s.url+"/test", s.tempfile.Name(), ch, ChecksumInfo{}, false)
+	d.DownloadWithChecksum(s.url+"/test", s.tempfile.Name(), ch, utils.ChecksumInfo{}, false)
 	res := <-ch
 	c.Assert(res, ErrorMatches, ".*size check mismatch 12 != 0")

-	d.DownloadWithChecksum(s.url+"/test", s.tempfile.Name(), ch, ChecksumInfo{Size: 12, MD5: "abcdef"}, false)
+	d.DownloadWithChecksum(s.url+"/test", s.tempfile.Name(), ch, utils.ChecksumInfo{Size: 12, MD5: "abcdef"}, false)
 	res = <-ch
 	c.Assert(res, ErrorMatches, ".*md5 hash mismatch \"a1acb0fe91c7db45ec4d775192ec5738\" != \"abcdef\"")

-	d.DownloadWithChecksum(s.url+"/test", s.tempfile.Name(), ch, ChecksumInfo{Size: 12, MD5: "abcdef"}, true)
+	d.DownloadWithChecksum(s.url+"/test", s.tempfile.Name(), ch, utils.ChecksumInfo{Size: 12, MD5: "abcdef"}, true)
 	res = <-ch
 	c.Assert(res, IsNil)

-	d.DownloadWithChecksum(s.url+"/test", s.tempfile.Name(), ch, ChecksumInfo{Size: 12, MD5: "a1acb0fe91c7db45ec4d775192ec5738"}, false)
+	d.DownloadWithChecksum(s.url+"/test", s.tempfile.Name(), ch, utils.ChecksumInfo{Size: 12, MD5: "a1acb0fe91c7db45ec4d775192ec5738"}, false)
 	res = <-ch
 	c.Assert(res, IsNil)

-	d.DownloadWithChecksum(s.url+"/test", s.tempfile.Name(), ch, ChecksumInfo{Size: 12, MD5: "a1acb0fe91c7db45ec4d775192ec5738", SHA1: "abcdef"}, false)
+	d.DownloadWithChecksum(s.url+"/test", s.tempfile.Name(), ch, utils.ChecksumInfo{Size: 12, MD5: "a1acb0fe91c7db45ec4d775192ec5738", SHA1: "abcdef"}, false)
 	res = <-ch
 	c.Assert(res, ErrorMatches, ".*sha1 hash mismatch \"921893bae6ad6fd818401875d6779254ef0ff0ec\" != \"abcdef\"")

-	d.DownloadWithChecksum(s.url+"/test", s.tempfile.Name(), ch, ChecksumInfo{Size: 12, MD5: "a1acb0fe91c7db45ec4d775192ec5738",
+	d.DownloadWithChecksum(s.url+"/test", s.tempfile.Name(), ch, utils.ChecksumInfo{Size: 12, MD5: "a1acb0fe91c7db45ec4d775192ec5738",
 		SHA1: "921893bae6ad6fd818401875d6779254ef0ff0ec"}, false)
 	res = <-ch
 	c.Assert(res, IsNil)

-	d.DownloadWithChecksum(s.url+"/test", s.tempfile.Name(), ch, ChecksumInfo{Size: 12, MD5: "a1acb0fe91c7db45ec4d775192ec5738",
+	d.DownloadWithChecksum(s.url+"/test", s.tempfile.Name(), ch, utils.ChecksumInfo{Size: 12, MD5: "a1acb0fe91c7db45ec4d775192ec5738",
 		SHA1: "921893bae6ad6fd818401875d6779254ef0ff0ec", SHA256: "abcdef"}, false)
 	res = <-ch
 	c.Assert(res, ErrorMatches, ".*sha256 hash mismatch \"b3c92ee1246176ed35f6e8463cd49074f29442f5bbffc3f8591cde1dcc849dac\" != \"abcdef\"")

-	d.DownloadWithChecksum(s.url+"/test", s.tempfile.Name(), ch, ChecksumInfo{Size: 12, MD5: "a1acb0fe91c7db45ec4d775192ec5738",
+	d.DownloadWithChecksum(s.url+"/test", s.tempfile.Name(), ch, utils.ChecksumInfo{Size: 12, MD5: "a1acb0fe91c7db45ec4d775192ec5738",
 		SHA1: "921893bae6ad6fd818401875d6779254ef0ff0ec", SHA256: "b3c92ee1246176ed35f6e8463cd49074f29442f5bbffc3f8591cde1dcc849dac"}, false)
 	res = <-ch
 	c.Assert(res, IsNil)
 }

 func (s *DownloaderSuite) TestDownload404(c *C) {
-	d := NewDownloader(2)
+	d := NewDownloader(2, s.progress)
 	defer d.Shutdown()
 	ch := make(chan error)

@@ -138,7 +141,7 @@ func (s *DownloaderSuite) TestDownload404(c *C) {
 }

 func (s *DownloaderSuite) TestDownloadConnectError(c *C) {
-	d := NewDownloader(2)
+	d := NewDownloader(2, s.progress)
 	defer d.Shutdown()
 	ch := make(chan error)

@@ -148,7 +151,7 @@ func (s *DownloaderSuite) TestDownloadConnectError(c *C) {
 }

 func (s *DownloaderSuite) TestDownloadFileError(c *C) {
-	d := NewDownloader(2)
+	d := NewDownloader(2, s.progress)
 	defer d.Shutdown()
 	ch := make(chan error)

@@ -158,7 +161,7 @@ func (s *DownloaderSuite) TestDownloadFileError(c *C) {
 }

 func (s *DownloaderSuite) TestDownloadTemp(c *C) {
-	d := NewDownloader(2)
+	d := NewDownloader(2, s.progress)
 	defer d.Shutdown()

 	f, err := DownloadTemp(d, s.url+"/test")
@@ -175,20 +178,20 @@ func (s *DownloaderSuite) TestDownloadTemp(c *C) {
 }

 func (s *DownloaderSuite) TestDownloadTempWithChecksum(c *C) {
-	d := NewDownloader(2)
+	d := NewDownloader(2, s.progress)
 	defer d.Shutdown()

-	f, err := DownloadTempWithChecksum(d, s.url+"/test", ChecksumInfo{Size: 12, MD5: "a1acb0fe91c7db45ec4d775192ec5738",
+	f, err := DownloadTempWithChecksum(d, s.url+"/test", utils.ChecksumInfo{Size: 12, MD5: "a1acb0fe91c7db45ec4d775192ec5738",
 		SHA1: "921893bae6ad6fd818401875d6779254ef0ff0ec", SHA256: "b3c92ee1246176ed35f6e8463cd49074f29442f5bbffc3f8591cde1dcc849dac"}, false)
 	defer f.Close()
 	c.Assert(err, IsNil)

-	_, err = DownloadTempWithChecksum(d, s.url+"/test", ChecksumInfo{Size: 13}, false)
+	_, err = DownloadTempWithChecksum(d, s.url+"/test", utils.ChecksumInfo{Size: 13}, false)
 	c.Assert(err, ErrorMatches, ".*size check mismatch 12 != 13")
 }

 func (s *DownloaderSuite) TestDownloadTempError(c *C) {
-	d := NewDownloader(2)
+	d := NewDownloader(2, s.progress)
 	defer d.Shutdown()

 	f, err := DownloadTemp(d, s.url+"/doesntexist")
@@ -206,10 +209,10 @@ const (
 func (s *DownloaderSuite) TestDownloadTryCompression(c *C) {
 	var buf []byte

-	expectedChecksums := map[string]ChecksumInfo{
-		"file.bz2": ChecksumInfo{Size: int64(len(bzipData))},
-		"file.gz":  ChecksumInfo{Size: int64(len(gzipData))},
-		"file":     ChecksumInfo{Size: int64(len(rawData))},
+	expectedChecksums := map[string]utils.ChecksumInfo{
+		"file.bz2": utils.ChecksumInfo{Size: int64(len(bzipData))},
+		"file.gz":  utils.ChecksumInfo{Size: int64(len(gzipData))},
+		"file":     utils.ChecksumInfo{Size: int64(len(rawData))},
 	}

 	// bzip2 only available
@@ -278,6 +281,6 @@ func (s *DownloaderSuite) TestDownloadTryCompressionErrors(c *C) {
 	d.ExpectError("http://example.com/file.bz2", errors.New("404"))
 	d.ExpectError("http://example.com/file.gz", errors.New("404"))
 	d.ExpectResponse("http://example.com/file", rawData)
-	_, _, err = DownloadTryCompression(d, "http://example.com/file", map[string]ChecksumInfo{"file": ChecksumInfo{Size: 7}}, false)
+	_, _, err = DownloadTryCompression(d, "http://example.com/file", map[string]utils.ChecksumInfo{"file": utils.ChecksumInfo{Size: 7}}, false)
 	c.Assert(err, ErrorMatches, "checksums don't match.*")
 }
--- a/utils/fake.go
+++ b/utils/fake.go
@@ -1,7 +1,9 @@
-package utils
+package http

 import (
 	"fmt"
+	"github.com/smira/aptly/aptly"
+	"github.com/smira/aptly/utils"
 	"io"
 	"os"
 	"path/filepath"
@@ -18,12 +20,11 @@ type expectedRequest struct {
 type FakeDownloader struct {
 	expected    []expectedRequest
 	anyExpected map[string]expectedRequest
-	progress    *Progress
 }

 // Check interface
 var (
-	_ Downloader = &FakeDownloader{}
+	_ aptly.Downloader = (*FakeDownloader)(nil)
 )

 // NewFakeDownloader creates new expected downloader
@@ -31,8 +32,6 @@ func NewFakeDownloader() *FakeDownloader {
 	result := &FakeDownloader{}
 	result.expected = make([]expectedRequest, 0)
 	result.anyExpected = make(map[string]expectedRequest)
-	result.progress = NewProgress()
-	result.progress.Start()
 	return result
 }

@@ -60,7 +59,7 @@ func (f *FakeDownloader) Empty() bool {
 }

 // DownloadWithChecksum performs fake download by matching against first expectation in the queue or any expectation, with cheksum verification
-func (f *FakeDownloader) DownloadWithChecksum(url string, filename string, result chan<- error, expected ChecksumInfo, ignoreMismatch bool) {
+func (f *FakeDownloader) DownloadWithChecksum(url string, filename string, result chan<- error, expected utils.ChecksumInfo, ignoreMismatch bool) {
 	var expectation expectedRequest
 	if len(f.expected) > 0 && f.expected[0].URL == url {
 		expectation, f.expected = f.expected[0], f.expected[1:]
@@ -90,7 +89,7 @@ func (f *FakeDownloader) DownloadWithChecksum(url string, filename string, resul
 	}
 	defer outfile.Close()

-	cks := NewChecksumWriter()
+	cks := utils.NewChecksumWriter()
 	w := io.MultiWriter(outfile, cks)

 	_, err = w.Write([]byte(expectation.Response))
@@ -117,12 +116,11 @@ func (f *FakeDownloader) DownloadWithChecksum(url string, filename string, resul

 // Download performs fake download by matching against first expectation in the queue
 func (f *FakeDownloader) Download(url string, filename string, result chan<- error) {
-	f.DownloadWithChecksum(url, filename, result, ChecksumInfo{Size: -1}, false)
+	f.DownloadWithChecksum(url, filename, result, utils.ChecksumInfo{Size: -1}, false)
 }

 // Shutdown does nothing
 func (f *FakeDownloader) Shutdown() {
-	f.progress.Shutdown()
 }

 // Pause does nothing
@@ -132,8 +130,3 @@ func (f *FakeDownloader) Pause() {
 // Resume does nothing
 func (f *FakeDownloader) Resume() {
 }
-
-// GetProgress does nothing
-func (f *FakeDownloader) GetProgress() *Progress {
-	return f.progress
-}
--- a/http/http.go
+++ b/http/http.go
@@ -0,0 +1,2 @@
+// Package http provides all HTTP-related operations
+package http
--- a/http/http_test.go
+++ b/http/http_test.go
@@ -0,0 +1,11 @@
+package http
+
+import (
+	. "launchpad.net/gocheck"
+	"testing"
+)
+
+// Launch gocheck tests
+func Test(t *testing.T) {
+	TestingT(t)
+}
--- a/main.go
+++ b/main.go
@@ -5,9 +5,11 @@ import (
 	"github.com/gonuts/commander"
 	"github.com/gonuts/flag"
 	"github.com/smira/aptly/aptly"
+	"github.com/smira/aptly/console"
 	"github.com/smira/aptly/database"
 	"github.com/smira/aptly/debian"
 	"github.com/smira/aptly/files"
+	"github.com/smira/aptly/http"
 	"github.com/smira/aptly/utils"
 	"os"
 	"path/filepath"
@@ -48,7 +50,8 @@ take snapshots and publish them back as Debian repositories.`,
 }

 var context struct {
-	downloader        utils.Downloader
+	progress          aptly.Progress
+	downloader        aptly.Downloader
 	database          database.Storage
 	packagePool       aptly.PackagePool
 	publishedStorage  aptly.PublishedStorage
@@ -116,7 +119,11 @@ func main() {
 		context.architecturesList = strings.Split(optionArchitectures, ",")
 	}

-	context.downloader = utils.NewDownloader(utils.Config.DownloadConcurrency)
+	context.progress = console.NewProgress()
+	context.progress.Start()
+	defer context.progress.Shutdown()
+
+	context.downloader = http.NewDownloader(utils.Config.DownloadConcurrency, context.progress)
 	defer context.downloader.Shutdown()

 	context.database, err = database.OpenDB(filepath.Join(utils.Config.RootDir, "db"))
--- a/utils/utils.go
+++ b/utils/utils.go
@@ -0,0 +1,2 @@
+// Package utils collects various services: simple operations, compression, etc.
+package utils
--- a/utils/utils_test.go
+++ b/utils/utils_test.go
@@ -0,0 +1,11 @@
+package utils
+
+import (
+	. "launchpad.net/gocheck"
+	"testing"
+)
+
+// Launch gocheck tests
+func Test(t *testing.T) {
+	TestingT(t)
+}