61 lines
1.7 KiB
Go
61 lines
1.7 KiB
Go
package docker
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import (
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"encoding/json"
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"fmt"
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"net/http"
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"github.com/containers/image/docker/reference"
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"github.com/containers/image/image"
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"github.com/containers/image/types"
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"github.com/pkg/errors"
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)
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// Image is a Docker-specific implementation of types.Image with a few extra methods
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// which are specific to Docker.
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type Image struct {
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types.Image
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src *dockerImageSource
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}
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// newImage returns a new Image interface type after setting up
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// a client to the registry hosting the given image.
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// The caller must call .Close() on the returned Image.
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func newImage(ctx *types.SystemContext, ref dockerReference) (types.Image, error) {
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s, err := newImageSource(ctx, ref, nil)
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if err != nil {
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return nil, err
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}
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img, err := image.FromSource(s)
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if err != nil {
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return nil, err
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}
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return &Image{Image: img, src: s}, nil
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}
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// SourceRefFullName returns a fully expanded name for the repository this image is in.
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func (i *Image) SourceRefFullName() string {
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return i.src.ref.ref.Name()
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}
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// GetRepositoryTags list all tags available in the repository. Note that this has no connection with the tag(s) used for this specific image, if any.
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func (i *Image) GetRepositoryTags() ([]string, error) {
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url := fmt.Sprintf(tagsURL, reference.Path(i.src.ref.ref))
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res, err := i.src.c.makeRequest("GET", url, nil, nil)
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if err != nil {
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return nil, err
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}
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defer res.Body.Close()
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if res.StatusCode != http.StatusOK {
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// print url also
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return nil, errors.Errorf("Invalid status code returned when fetching tags list %d", res.StatusCode)
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}
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type tagsRes struct {
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Tags []string
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}
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tags := &tagsRes{}
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if err := json.NewDecoder(res.Body).Decode(tags); err != nil {
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return nil, err
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}
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return tags.Tags, nil
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}
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