imagetools: implement inspect for manifest list
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>pull/25/head
Tonis Tiigi
6 years ago
parent
a0719aee88
commit
0a28ec6f38
@ -0,0 +1,92 @@
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package imagetools
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import (
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"bytes"
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"context"
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"io"
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"net/http"
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"github.com/containerd/containerd/remotes"
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"github.com/containerd/containerd/remotes/docker"
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clitypes "github.com/docker/cli/cli/config/types"
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"github.com/docker/distribution/reference"
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ocispec "github.com/opencontainers/image-spec/specs-go/v1"
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)
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type Auth interface {
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GetAuthConfig(registryHostname string) (clitypes.AuthConfig, error)
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}
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type Opt struct {
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Auth Auth
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}
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type Resolver struct {
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r remotes.Resolver
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}
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func New(opt Opt) *Resolver {
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resolver := docker.NewResolver(docker.ResolverOptions{
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Client: http.DefaultClient,
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Credentials: toCredentialsFunc(opt.Auth),
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})
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return &Resolver{
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r: resolver,
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}
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}
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func (r *Resolver) Get(ctx context.Context, in string) ([]byte, ocispec.Descriptor, error) {
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ref, err := parseRef(in)
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if err != nil {
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return nil, ocispec.Descriptor{}, err
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}
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in, desc, err := r.r.Resolve(ctx, ref.String())
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if err != nil {
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return nil, ocispec.Descriptor{}, err
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}
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fetcher, err := r.r.Fetcher(ctx, in)
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if err != nil {
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return nil, ocispec.Descriptor{}, err
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}
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rc, err := fetcher.Fetch(ctx, desc)
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if err != nil {
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return nil, ocispec.Descriptor{}, err
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}
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buf := &bytes.Buffer{}
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_, err = io.Copy(buf, rc)
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rc.Close()
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if err != nil {
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return nil, ocispec.Descriptor{}, err
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}
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return buf.Bytes(), desc, nil
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}
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func parseRef(s string) (reference.Named, error) {
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ref, err := reference.ParseNormalizedNamed(s)
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if err != nil {
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return nil, err
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}
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ref = reference.TagNameOnly(ref)
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return ref, nil
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}
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func toCredentialsFunc(a Auth) func(string) (string, string, error) {
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return func(host string) (string, string, error) {
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if host == "registry-1.docker.io" {
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host = "https://index.docker.io/v1/"
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}
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ac, err := a.GetAuthConfig(host)
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if err != nil {
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return "", "", err
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}
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if ac.IdentityToken != "" {
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return "", ac.IdentityToken, nil
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}
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return ac.Username, ac.Password, nil
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}
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}
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@ -0,0 +1,74 @@
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package imagetools
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import (
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"encoding/json"
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"fmt"
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"io"
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"os"
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"strings"
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"text/tabwriter"
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"github.com/containerd/containerd/platforms"
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"github.com/docker/distribution/reference"
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ocispec "github.com/opencontainers/image-spec/specs-go/v1"
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)
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func PrintManifestList(dt []byte, desc ocispec.Descriptor, refstr string, out io.Writer) error {
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ref, err := parseRef(refstr)
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if err != nil {
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return err
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}
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var mfst ocispec.Index
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if err := json.Unmarshal(dt, &mfst); err != nil {
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return err
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}
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w := tabwriter.NewWriter(out, 0, 0, 1, ' ', 0)
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fmt.Fprintf(w, "Name:\t%s\n", ref.String())
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fmt.Fprintf(w, "MediaType:\t%s\n", desc.MediaType)
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fmt.Fprintf(w, "Digest:\t%s\n", desc.Digest)
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fmt.Fprintf(w, "\t\n")
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fmt.Fprintf(w, "Manifests:\t\n")
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w.Flush()
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pfx := " "
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w = tabwriter.NewWriter(os.Stdout, 0, 0, 1, ' ', 0)
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for i, m := range mfst.Manifests {
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if i != 0 {
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fmt.Fprintf(w, "\t\n")
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}
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cr, err := reference.WithDigest(ref, m.Digest)
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if err != nil {
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return err
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}
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fmt.Fprintf(w, "%sName:\t%s\n", pfx, cr.String())
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fmt.Fprintf(w, "%sMediaType:\t%s\n", pfx, m.MediaType)
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if p := m.Platform; p != nil {
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fmt.Fprintf(w, "%sPlatform:\t%s\n", pfx, platforms.Format(*p))
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if p.OSVersion != "" {
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fmt.Fprintf(w, "%sOSVersion:\t%s\n", pfx, p.OSVersion)
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}
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if len(p.OSFeatures) > 0 {
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fmt.Fprintf(w, "%sOSFeatures:\t%s\n", pfx, strings.Join(p.OSFeatures, ", "))
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}
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if len(m.URLs) > 0 {
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fmt.Fprintf(w, "%sURLs:\t%s\n", pfx, strings.Join(m.URLs, ", "))
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}
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if len(m.Annotations) > 0 {
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w.Flush()
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w2 := tabwriter.NewWriter(os.Stdout, 0, 0, 1, ' ', 0)
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pfx2 := pfx + " "
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for k, v := range m.Annotations {
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fmt.Fprintf(w2, "%s%s:\t%s\n", pfx2, k, v)
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}
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w2.Flush()
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}
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}
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}
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return w.Flush()
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}
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