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pkg/chrootarchive: pass TarOptions via CLI arg

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Signed-off-by: Tibor Vass <teabee89@gmail.com>
This commit is contained in:
Tibor Vass 2014-11-08 10:38:42 -05:00 committed by unclejack
parent 0357b26c1b
commit 3ac6394b80
5 changed files with 58 additions and 4 deletions
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1
builder/internals.go
View file

@ -48,7 +48,6 @@ func (b *Builder) readContext(context io.Reader) error {
return err
}
os.MkdirAll(tmpdirPath, 0700)
if err := chrootarchive.Untar(b.context, tmpdirPath, nil); err != nil {
return err
}

3
graph/load.go
View file

@ -10,6 +10,7 @@ import (
"github.com/docker/docker/engine"
"github.com/docker/docker/image"
"github.com/docker/docker/pkg/archive"
"github.com/docker/docker/pkg/chrootarchive"
"github.com/docker/docker/pkg/log"
)
@ -53,7 +54,7 @@ func (s *TagStore) CmdLoad(job *engine.Job) engine.Status {
excludes[i] = k
i++
}
if err := archive.Untar(repoFile, repoDir, &archive.TarOptions{Excludes: excludes}); err != nil {
if err := chrootarchive.Untar(repoFile, repoDir, &archive.TarOptions{Excludes: excludes}); err != nil {
return job.Error(err)
}

18
pkg/chrootarchive/archive.go
View file

@ -1,11 +1,14 @@
package chrootarchive
import (
"bytes"
"encoding/json"
"flag"
"fmt"
"io"
"os"
"runtime"
"strings"
"syscall"
"github.com/docker/docker/pkg/archive"
@ -22,7 +25,12 @@ func untar() {
if err := syscall.Chdir("/"); err != nil {
fatal(err)
}
if err := archive.Untar(os.Stdin, "/", nil); err != nil {
options := new(archive.TarOptions)
dec := json.NewDecoder(strings.NewReader(flag.Arg(1)))
if err := dec.Decode(options); err != nil {
fatal(err)
}
if err := archive.Untar(os.Stdin, "/", options); err != nil {
fatal(err)
}
os.Exit(0)
@ -33,12 +41,18 @@ var (
)
func Untar(archive io.Reader, dest string, options *archive.TarOptions) error {
var buf bytes.Buffer
enc := json.NewEncoder(&buf)
if err := enc.Encode(options); err != nil {
return fmt.Errorf("Untar json encode: %v", err)
}
if _, err := os.Stat(dest); os.IsNotExist(err) {
if err := os.MkdirAll(dest, 0777); err != nil {
return err
}
}
cmd := reexec.Command("docker-untar", dest)
cmd := reexec.Command("docker-untar", dest, buf.String())
cmd.Stdin = archive
out, err := cmd.CombinedOutput()
if err != nil {

39
pkg/chrootarchive/archive_test.go Normal file
View file

@ -0,0 +1,39 @@
package chrootarchive
import (
"io/ioutil"
"os"
"path/filepath"
"testing"
"github.com/docker/docker/pkg/archive"
)
func TestChrootTarUntar(t *testing.T) {
tmpdir, err := ioutil.TempDir("", "docker-TestChrootTarUntar")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpdir)
src := filepath.Join(tmpdir, "src")
if err := os.MkdirAll(src, 0700); err != nil {
t.Fatal(err)
}
if err := ioutil.WriteFile(filepath.Join(src, "toto"), []byte("hello toto"), 0644); err != nil {
t.Fatal(err)
}
if err := ioutil.WriteFile(filepath.Join(src, "lolo"), []byte("hello lolo"), 0644); err != nil {
t.Fatal(err)
}
stream, err := archive.Tar(src, archive.Uncompressed)
if err != nil {
t.Fatal(err)
}
dest := filepath.Join(tmpdir, "src")
if err := os.MkdirAll(dest, 0700); err != nil {
t.Fatal(err)
}
if err := Untar(stream, dest, &archive.TarOptions{Excludes: []string{"lolo"}}); err != nil {
t.Fatal(err)
}
}

1
pkg/chrootarchive/init.go
View file

@ -10,6 +10,7 @@ import (
func init() {
reexec.Register("docker-untar", untar)
reexec.Register("docker-applyLayer", applyLayer)
reexec.Init()
}
func fatal(err error) {