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// Copyright 2013 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package names
import (
"fmt"
"regexp"
"strings"
)
var validUnit = regexp.MustCompile("^" + ServiceSnippet + "/" + NumberSnippet + "$")
// UnitTag returns the tag for the unit with the given name.
// It will panic if the given unit name is not valid.
func UnitTag(unitName string) string {
// Replace only the last "/" with "-".
i := strings.LastIndex(unitName, "/")
if i <= 0 || !IsUnit(unitName) {
panic(fmt.Sprintf("%q is not a valid unit name", unitName))
}
unitName = unitName[:i] + "-" + unitName[i+1:]
return makeTag(UnitTagKind, unitName)
}
// IsUnit returns whether name is a valid unit name.
func IsUnit(name string) bool {
return validUnit.MatchString(name)
}
// UnitService returns the name of the service that the unit is
// associated with. It panics if unitName is not a valid unit name.
func UnitService(unitName string) string {
s := validUnit.FindStringSubmatch(unitName)
if s == nil {
panic(fmt.Sprintf("%q is not a valid unit name", unitName))
}
return s[1]
}
func unitTagSuffixToId(s string) string {
// Replace only the last "-" with "/", as it is valid for service
// names to contain hyphens.
if i := strings.LastIndex(s, "-"); i > 0 {
s = s[:i] + "/" + s[i+1:]
}
return s
}
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