func checkMinimalContainer(t *testing.T, acipath string, expectedManifest schema.ImageManifest) {
// Check that there are no files in the rootfs
files, err := ioutil.ReadDir(path.Join(acipath, aci.RootfsDir))
if err != nil {
t.Errorf("%v", err)
}
if len(files) != 0 {
t.Errorf("rootfs in aci contains files, should be empty")
}
// Check that the manifest is no bigger than it needs to be
manblob, err := ioutil.ReadFile(path.Join(acipath, aci.ManifestFile))
if err != nil {
t.Errorf("%v", err)
}
var man schema.ImageManifest
err = man.UnmarshalJSON(manblob)
if err != nil {
t.Errorf("invalid manifest schema: %v", err)
}
if str := pretty.Compare(man, expectedManifest); str != "" {
t.Errorf("unexpected manifest:\n%s", str)
}
}
// ManifestFromImage extracts a new schema.ImageManifest from the given ACI image.
func ManifestFromImage(rs io.ReadSeeker) (*schema.ImageManifest, error) {
var im schema.ImageManifest
tr, err := NewCompressedTarReader(rs)
if err != nil {
return nil, err
}
defer tr.Close()
for {
hdr, err := tr.Next()
switch err {
case io.EOF:
return nil, errors.New("missing manifest")
case nil:
if filepath.Clean(hdr.Name) == ManifestFile {
data, err := ioutil.ReadAll(tr)
if err != nil {
return nil, err
}
if err := im.UnmarshalJSON(data); err != nil {
return nil, err
}
return &im, nil
}
default:
return nil, fmt.Errorf("error extracting tarball: %v", err)
}
}
}
func validate(imOK bool, im io.Reader, rfsOK bool, files []string) error {
defer func() {
if rc, ok := im.(io.Closer); ok {
rc.Close()
}
}()
if !imOK {
return ErrNoManifest
}
if !rfsOK {
return ErrNoRootFS
}
b, err := ioutil.ReadAll(im)
if err != nil {
return fmt.Errorf("error reading image manifest: %v", err)
}
var a schema.ImageManifest
if err := a.UnmarshalJSON(b); err != nil {
return fmt.Errorf("image manifest validation failed: %v", err)
}
if a.ACVersion.LessThanMajor(schema.AppContainerVersion) {
return ErrOldVersion{
version: a.ACVersion,
}
}
for _, f := range files {
if !strings.HasPrefix(f, "rootfs") {
return fmt.Errorf("unrecognized file path in layout: %q", f)
}
}
return nil
}
func createImageManifest(imj string) (*schema.ImageManifest, error) {
var im schema.ImageManifest
err := im.UnmarshalJSON([]byte(imj))
if err != nil {
return nil, err
}
return &im, nil
}
func prettyPrintMan(manblob []byte) []byte {
var man schema.ImageManifest
err := man.UnmarshalJSON(manblob)
if err != nil {
panic(err)
}
manblob2, err := json.MarshalIndent(man, "", " ")
if err != nil {
panic(err)
}
return manblob2
}
// CatManifest will print to stdout the manifest from the ACI stored at
// aciPath, optionally inserting whitespace to make it more human readable.
func CatManifest(aciPath string, prettyPrint bool) (err error) {
finfo, err := os.Stat(aciPath)
switch {
case os.IsNotExist(err):
return fmt.Errorf("no such file or directory: %s", aciPath)
case err != nil:
return err
case finfo.IsDir():
return fmt.Errorf("%s is a directory, not an ACI", aciPath)
default:
break
}
file, err := os.Open(aciPath)
if err != nil {
return err
}
defer file.Close()
tr, err := aci.NewCompressedTarReader(file)
if err != nil {
return fmt.Errorf("error decompressing image: %v", err)
}
defer tr.Close()
for {
hdr, err := tr.Next()
switch {
case err == io.EOF:
return fmt.Errorf("manifest not found in ACI %s", aciPath)
case err != nil:
return err
case hdr.Name == "manifest":
manblob, err := ioutil.ReadAll(tr)
if err != nil {
return err
}
var man schema.ImageManifest
err = man.UnmarshalJSON(manblob)
if err != nil {
return err
}
return util.PrintManifest(&man, prettyPrint)
}
}
}
func checkManifest(t *testing.T, workingDir string, wantedManifest schema.ImageManifest) {
acipath := path.Join(workingDir, ".acbuild", "currentaci")
manblob, err := ioutil.ReadFile(path.Join(acipath, aci.ManifestFile))
if err != nil {
panic(err)
}
var man schema.ImageManifest
err = man.UnmarshalJSON(manblob)
if err != nil {
t.Errorf("invalid manifest schema: %v", err)
}
if str := pretty.Compare(man, wantedManifest); str != "" {
t.Errorf("unexpected manifest:\n%s", str)
}
}
// ReplaceManifest will replace the manifest in the expanded ACI stored at
// a.CurrentACIPath with the new manifest stored at manifestPath
func (a *ACBuild) ReplaceManifest(manifestPath string) (err error) {
if err = a.lock(); err != nil {
return err
}
defer func() {
if err1 := a.unlock(); err == nil {
err = err1
}
}()
finfo, err := os.Stat(manifestPath)
switch {
case os.IsNotExist(err):
return fmt.Errorf("no such file or directory: %s", manifestPath)
case err != nil:
return err
case finfo.IsDir():
return fmt.Errorf("%s is a directory", manifestPath)
default:
break
}
manblob, err := ioutil.ReadFile(manifestPath)
if err != nil {
return err
}
// Marshal and Unmarshal the manifest to assert that it's valid and to
// strip any whitespace
var man schema.ImageManifest
err = man.UnmarshalJSON(manblob)
if err != nil {
return err
}
manblob, err = man.MarshalJSON()
if err != nil {
return err
}
return ioutil.WriteFile(path.Join(a.CurrentACIPath, aci.ManifestFile), manblob, 0755)
}
func testCat(t *testing.T, workingDir string) {
wantedManblob, err := ioutil.ReadFile(path.Join(workingDir, ".acbuild", "currentaci", aci.ManifestFile))
if err != nil {
panic(err)
}
wantedManblob = append(wantedManblob, byte('\n'))
var man schema.ImageManifest
err = man.UnmarshalJSON(wantedManblob)
if err != nil {
panic(err)
}
_, manblob, _, err := runACBuild(workingDir, "cat-manifest")
if err != nil {
t.Fatalf("%v", err)
}
if manblob != string(wantedManblob) {
t.Fatalf("printed manifest and manifest on disk differ")
}
wantedManblob = prettyPrintMan(wantedManblob)
wantedManblob = append(wantedManblob, byte('\n'))
_, manblob, _, err = runACBuild(workingDir, "cat-manifest", "--pretty-print")
if err != nil {
t.Fatalf("%v", err)
}
if manblob != string(wantedManblob) {
t.Fatalf("pretty printed manifest and manifest on disk differ")
}
checkManifest(t, workingDir, man)
checkEmptyRootfs(t, workingDir)
}
