// 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)
}
}
}
// CatManifest will print to stdout the manifest from the expanded ACI stored
// at a.CurrentACIPath, optionally inserting whitespace to make it more human
// readable.
func (a *ACBuild) CatManifest(prettyPrint bool) (err error) {
if err = a.lock(); err != nil {
return err
}
defer func() {
if err1 := a.unlock(); err == nil {
err = err1
}
}()
man, err := util.GetManifest(a.CurrentACIPath)
if err != nil {
return err
}
return util.PrintManifest(man, prettyPrint)
}