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60 lines
1.6 KiB
60 lines
1.6 KiB
/*
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Copyright The Helm Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package registry // import "helm.sh/helm/v4/pkg/registry"
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import (
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"fmt"
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"github.com/Masterminds/semver/v3"
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)
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func GetTagMatchingVersionOrConstraint(tags []string, versionString string) (string, error) {
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var constraint *semver.Constraints
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if versionString == "" {
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// If the string is empty, set a wildcard constraint
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constraint, _ = semver.NewConstraint("*")
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} else {
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// when customer inputs a specific version, check whether there's an exact match first
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for _, v := range tags {
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if versionString == v {
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return v, nil
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}
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}
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// Otherwise set constraint to the string given
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var err error
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constraint, err = semver.NewConstraint(versionString)
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if err != nil {
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return "", err
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}
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}
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// Otherwise try to find the first available version matching the string,
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// in case it is a constraint
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for _, v := range tags {
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test, err := semver.NewVersion(v)
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if err != nil {
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continue
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}
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if constraint.Check(test) {
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return v, nil
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}
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}
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return "", fmt.Errorf("could not locate a version matching provided version string %s", versionString)
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}
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