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bb6f0f8e26
This is the stage 1 effort for an image library that can be eventually used by buildah and podman alike. In eventuality, the main goal of the library (package) is to: * provide a consistent approach to resolving image names in various forms (from users). * based on the result of the above, provide image methods that in a singular spot but separate from the runtime. * reduce the cruft and bloat in the current podman runtime. The goal of stage 1 is to demonstrate fast, accurate image resolution for both local and remote images resulting in an image object as part of the return. Signed-off-by: baude <bbaude@redhat.com> Closes: #463 Approved by: baude
43 lines
1.2 KiB
Go
43 lines
1.2 KiB
Go
package image
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import (
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"github.com/containers/image/docker/reference"
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"github.com/containers/storage"
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"github.com/pkg/errors"
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)
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func getTags(nameInput string) (reference.NamedTagged, bool, error) {
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inputRef, err := reference.Parse(nameInput)
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if err != nil {
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return nil, false, errors.Wrapf(err, "unable to obtain tag from input name")
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}
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tagged, isTagged := inputRef.(reference.NamedTagged)
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return tagged, isTagged, nil
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}
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// findImageInRepotags takes an imageParts struct and searches images' repotags for
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// a match on name:tag
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func findImageInRepotags(search imageParts, images []*storage.Image) (*storage.Image, error) {
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var results []*storage.Image
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for _, image := range images {
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for _, name := range image.Names {
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d, err := decompose(name)
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// if we get an error, ignore and keep going
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if err != nil {
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continue
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}
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if d.name == search.name && d.tag == search.tag {
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results = append(results, image)
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break
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}
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}
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}
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if len(results) == 0 {
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return &storage.Image{}, errors.Errorf("unable to find a name and tag match for %s in repotags", search)
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} else if len(results) > 1 {
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return &storage.Image{}, errors.Errorf("found multiple name and tag matches for %s in repotags", search)
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}
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return results[0], nil
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}
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