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/*
* Copyright (c) SAS Institute, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package rpmutils
import (
"fmt"
"sort"
)
// NEVRA holds the name, epoch, version, release and arch of the RPM, which uniquely identifies it
type NEVRA struct {
Name string
Epoch string
Version string
Release string
Arch string
}
// TODO: in v2 change epoch to an int
func (nevra *NEVRA) String() string {
return fmt.Sprintf("%s-%s:%s-%s.%s.rpm", nevra.Name, nevra.Epoch, nevra.Version, nevra.Release, nevra.Arch)
}
// NEVRAcmp compares two RPM versions. It returns -1 if a < b, 1 if a > b, and 0 if a == b
func NEVRAcmp(a NEVRA, b NEVRA) int {
if res := Vercmp(a.Epoch, b.Epoch); res != 0 {
return res
}
if res := Vercmp(a.Version, b.Version); res != 0 {
return res
}
if res := Vercmp(a.Release, b.Release); res != 0 {
return res
}
return 0
}
// NEVRASlice is used to sort a list of NEVRAs and implements sort.Interface
type NEVRASlice []NEVRA
func (s NEVRASlice) Len() int {
return len(s)
}
func (s NEVRASlice) Less(i, j int) bool {
return NEVRAcmp(s[i], s[j]) == -1
}
func (s NEVRASlice) Swap(i, j int) {
n := s[i]
s[i] = s[j]
s[j] = n
}
// Sort a list of NEVRAs in-place
func (s NEVRASlice) Sort() {
sort.Sort(s)
}
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