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81 lines
1.8 KiB
81 lines
1.8 KiB
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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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
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import (
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"fmt"
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"strconv"
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"strings"
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)
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type SemVer struct {
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Major uint
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Minor uint
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Patch uint
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}
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func NewSemVer(version string) (*SemVer, error) {
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result := &SemVer{}
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parts := strings.SplitN(version, ".", 3)
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if len(parts) > 3 {
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return nil, fmt.Errorf("invalid semantic version: %s", version)
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}
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major, err := strconv.ParseUint(parts[0], 10, 0)
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if err != nil {
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return nil, fmt.Errorf("invalid semantic version: %s", version)
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}
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result.Major = uint(major)
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if len(parts) < 3 {
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if len(parts) < 2 {
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if len(parts) < 1 {
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return nil, fmt.Errorf("invalid semantic version: %s", version)
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}
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} else {
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minor, err := strconv.ParseUint(parts[1], 10, 0)
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if err != nil {
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return nil, fmt.Errorf("invalid semantic version: %s", version)
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}
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result.Minor = uint(minor)
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}
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} else {
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patch, err := strconv.ParseUint(parts[2], 10, 0)
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if err != nil {
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return nil, fmt.Errorf("invalid semantic version: %s", version)
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}
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result.Patch = uint(patch)
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}
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return result, nil
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}
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func (s *SemVer) String() string {
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result := strconv.Itoa(int(s.Major))
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if s.Minor != 0 || s.Patch != 0 {
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result = result + "." + strconv.Itoa(int(s.Minor))
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}
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if s.Patch != 0 {
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result = result + "." + strconv.Itoa(int(s.Patch))
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}
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return result
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}
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