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version_rule.go
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version_rule.go
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package helm
import (
"github.com/Masterminds/semver"
)
// A chart version rule defines the rules for allowed chart versions
type ChartVersionRule struct {
s string
constraint *semver.Constraints
}
func NewChartVersionRule(ver string) (ChartVersionRule, error) {
s := ver
if len(ver) == 0 {
s = "*"
}
constraint, err := semver.NewConstraint(s)
if err != nil {
return ChartVersionRule{}, err
}
return ChartVersionRule{
constraint: constraint,
s: s,
}, nil
}
// Allowed returns true if the version provided is allowed by the ChartVersionRule
func (cv ChartVersionRule) Allowed(s string) (bool, error) {
test, err := semver.NewVersion(s)
if err != nil {
return false, err
}
if cv.constraint.Check(test) {
return true, nil
}
return false, nil
}
func (cv ChartVersionRule) String() string {
return cv.s
}
// MoreRecentThan returns True if a is more recent than b
func MoreRecentThan(a, b string) (bool, error) {
aver, err := semver.NewVersion(a)
if err != nil {
return false, err
}
bver, err := semver.NewVersion(b)
if err != nil {
return false, err
}
return aver.GreaterThan(bver), nil
}
// Equal returns True if a is equal to b
func Equal(a, b string) (bool, error) {
aver, err := semver.NewVersion(a)
if err != nil {
return false, err
}
bver, err := semver.NewVersion(b)
if err != nil {
return false, err
}
return aver.Equal(bver), nil
}