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imagetools: add create support

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Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
This commit is contained in:
Tonis Tiigi
2019-04-18 14:29:02 -07:00
parent 2f668d555c
commit 80ad78e372
3 changed files with 403 additions and 13 deletions
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29
util/imagetools/inspect.go
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@ -35,35 +35,52 @@ func New(opt Opt) *Resolver {
}
}
func (r *Resolver) Get(ctx context.Context, in string) ([]byte, ocispec.Descriptor, error) {
func (r *Resolver) Resolve(ctx context.Context, in string) (string, ocispec.Descriptor, error) {
ref, err := parseRef(in)
if err != nil {
return nil, ocispec.Descriptor{}, err
return "", ocispec.Descriptor{}, err
}
in, desc, err := r.r.Resolve(ctx, ref.String())
if err != nil {
return "", ocispec.Descriptor{}, err
}
return in, desc, nil
}
func (r *Resolver) Get(ctx context.Context, in string) ([]byte, ocispec.Descriptor, error) {
in, desc, err := r.Resolve(ctx, in)
if err != nil {
return nil, ocispec.Descriptor{}, err
}
fetcher, err := r.r.Fetcher(ctx, in)
dt, err := r.GetDescriptor(ctx, in, desc)
if err != nil {
return nil, ocispec.Descriptor{}, err
}
return dt, desc, nil
}
func (r *Resolver) GetDescriptor(ctx context.Context, in string, desc ocispec.Descriptor) ([]byte, error) {
fetcher, err := r.r.Fetcher(ctx, in)
if err != nil {
return nil, err
}
rc, err := fetcher.Fetch(ctx, desc)
if err != nil {
return nil, ocispec.Descriptor{}, err
return nil, err
}
buf := &bytes.Buffer{}
_, err = io.Copy(buf, rc)
rc.Close()
if err != nil {
return nil, ocispec.Descriptor{}, err
return nil, err
}
return buf.Bytes(), desc, nil
return buf.Bytes(), nil
}
func parseRef(s string) (reference.Named, error) {