/
tag_selected.go
66 lines (51 loc) · 1.69 KB
/
tag_selected.go
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// Copyright 2024 The Carvel Authors.
// SPDX-License-Identifier: Apache-2.0
package image
import (
"fmt"
ctlconf "carvel.dev/kbld/pkg/kbld/config"
ctlreg "carvel.dev/kbld/pkg/kbld/registry"
"carvel.dev/vendir/pkg/vendir/versions"
"carvel.dev/vendir/pkg/vendir/versions/v1alpha1"
regname "github.com/google/go-containerregistry/pkg/name"
)
// TagSelectedImage represents an image that will be resolved into url+digest
type TagSelectedImage struct {
url string
selection *v1alpha1.VersionSelection
registry ctlreg.Registry
}
func NewTagSelectedImage(url string, selection *v1alpha1.VersionSelection,
registry ctlreg.Registry) TagSelectedImage {
return TagSelectedImage{url, selection, registry}
}
func (i TagSelectedImage) URL() (string, []ctlconf.Origin, error) {
repo, err := regname.NewRepository(i.url, regname.WeakValidation)
if err != nil {
return "", nil, err
}
var tag string
switch {
case i.selection.Semver != nil:
tags, err := i.registry.ListTags(repo)
if err != nil {
return "", nil, err
}
matchedVers := versions.NewRelaxedSemversNoErr(tags).FilterPrereleases(i.selection.Semver.Prereleases)
if len(i.selection.Semver.Constraints) > 0 {
matchedVers, err = matchedVers.FilterConstraints(i.selection.Semver.Constraints)
if err != nil {
return "", nil, fmt.Errorf("Selecting versions: %s", err)
}
}
highestVersion, found := matchedVers.Highest()
if !found {
return "", nil, fmt.Errorf("Expected to find at least one version, but did not")
}
tag = highestVersion
default:
return "", nil, fmt.Errorf("Unknown tag selection strategy")
}
// tag value is included by ResolvedImage
return NewResolvedImage(i.url+":"+tag, i.registry).URL()
}