containerd/bundle/bundle.go
Michael Crosby dd39b4dcf0 Add basic bundle, spec, and config types
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
2016-12-09 14:27:31 -08:00

62 lines
1 KiB
Go

package bundle
import (
"encoding/json"
"os"
"path/filepath"
"github.com/opencontainers/runtime-spec/specs-go"
)
const configName = "config.json"
func New(path string, s *specs.Spec) (*Bundle, error) {
if err := os.Mkdir(path, 0700); err != nil {
return nil, err
}
b := &Bundle{
Path: path,
}
if err := os.Mkdir(filepath.Join(path, "rootfs"), 0700); err != nil {
b.Delete()
return nil, err
}
f, err := os.Create(filepath.Join(path, configName))
if err != nil {
b.Delete()
return nil, err
}
err = json.NewEncoder(f).Encode(s)
f.Close()
if err != nil {
b.Delete()
return nil, err
}
return b, nil
}
func Load(path string) (*Bundle, error) {
// TODO: do validation
return &Bundle{
Path: path,
}, nil
}
type Bundle struct {
Path string
}
func (b *Bundle) Config() (*specs.Spec, error) {
var s specs.Spec
f, err := os.Open(filepath.Join(b.Path, configName))
if err != nil {
return nil, err
}
err = json.NewDecoder(f).Decode(&s)
f.Close()
return &s, err
}
func (b *Bundle) Delete() error {
return os.RemoveAll(b.Path)
}