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version.go
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version.go
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// SPDX-FileCopyrightText: 2024 SAP SE or an SAP affiliate company and Gardener contributors
//
// SPDX-License-Identifier: Apache-2.0
package version
import (
"fmt"
"strings"
"github.com/Masterminds/semver/v3"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
)
var (
// ConstraintK8sGreaterEqual126 is a version constraint for versions >= 1.26.
ConstraintK8sGreaterEqual126 *semver.Constraints
// ConstraintK8sLess126 is a version constraint for versions < 1.26.
ConstraintK8sLess126 *semver.Constraints
// ConstraintK8sGreaterEqual127 is a version constraint for versions >= 1.27.
ConstraintK8sGreaterEqual127 *semver.Constraints
// ConstraintK8sLess127 is a version constraint for versions < 1.27.
ConstraintK8sLess127 *semver.Constraints
// ConstraintK8sGreaterEqual128 is a version constraint for versions >= 1.28.
ConstraintK8sGreaterEqual128 *semver.Constraints
// ConstraintK8sEqual128 is a version constraint for versions == 1.28.
ConstraintK8sEqual128 *semver.Constraints
// ConstraintK8sGreaterEqual129 is a version constraint for versions >= 1.29.
ConstraintK8sGreaterEqual129 *semver.Constraints
)
func init() {
var err error
ConstraintK8sGreaterEqual126, err = semver.NewConstraint(">= 1.26-0")
utilruntime.Must(err)
ConstraintK8sLess126, err = semver.NewConstraint("< 1.26-0")
utilruntime.Must(err)
ConstraintK8sGreaterEqual127, err = semver.NewConstraint(">= 1.27-0")
utilruntime.Must(err)
ConstraintK8sLess127, err = semver.NewConstraint("< 1.27-0")
utilruntime.Must(err)
ConstraintK8sGreaterEqual128, err = semver.NewConstraint(">= 1.28-0")
utilruntime.Must(err)
ConstraintK8sEqual128, err = semver.NewConstraint("~ 1.28.x-0")
utilruntime.Must(err)
ConstraintK8sGreaterEqual129, err = semver.NewConstraint(">= 1.29-0")
utilruntime.Must(err)
}
// CompareVersions returns true if the constraint <version1> compared by <operator> to <version2>
// returns true, and false otherwise.
// The comparison is based on semantic versions, i.e. <version1> and <version2> will be converted
// if needed.
func CompareVersions(version1, operator, version2 string) (bool, error) {
var (
v1 = normalize(version1)
v2 = normalize(version2)
)
return CheckVersionMeetsConstraint(v1, fmt.Sprintf("%s %s", operator, v2))
}
// CheckVersionMeetsConstraint returns true if the <version> meets the <constraint>.
func CheckVersionMeetsConstraint(version, constraint string) (bool, error) {
c, err := semver.NewConstraint(constraint)
if err != nil {
return false, err
}
v, err := semver.NewVersion(normalize(version))
if err != nil {
return false, err
}
return c.Check(v), nil
}
func normalize(version string) string {
v := strings.Replace(version, "v", "", -1)
idx := strings.IndexAny(v, "-+")
if idx != -1 {
v = v[:idx]
}
return v
}
// VersionRange represents a version range of type [AddedInVersion, RemovedInVersion).
type VersionRange struct {
AddedInVersion string
RemovedInVersion string
}
// Contains returns true if the range contains the given version, false otherwise.
// The range contains the given version only if it's greater or equal than AddedInVersion (always true if AddedInVersion is empty),
// and less than RemovedInVersion (always true if RemovedInVersion is empty).
func (r *VersionRange) Contains(version string) (bool, error) {
var constraint string
switch {
case r.AddedInVersion != "" && r.RemovedInVersion == "":
constraint = ">= " + r.AddedInVersion
case r.AddedInVersion == "" && r.RemovedInVersion != "":
constraint = "< " + r.RemovedInVersion
case r.AddedInVersion != "" && r.RemovedInVersion != "":
constraint = fmt.Sprintf(">= %s, < %s", r.AddedInVersion, r.RemovedInVersion)
default:
constraint = "*"
}
return CheckVersionMeetsConstraint(version, constraint)
}
// SupportedVersionRange returns the supported version range for the given API.
func (r *VersionRange) SupportedVersionRange() string {
switch {
case r.AddedInVersion != "" && r.RemovedInVersion == "":
return "versions >= " + r.AddedInVersion
case r.AddedInVersion == "" && r.RemovedInVersion != "":
return "versions < " + r.RemovedInVersion
case r.AddedInVersion != "" && r.RemovedInVersion != "":
return fmt.Sprintf("versions >= %s, < %s", r.AddedInVersion, r.RemovedInVersion)
default:
return "all kubernetes versions"
}
}