178 lines
3.7 KiB
Go
178 lines
3.7 KiB
Go
package versions
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import (
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"errors"
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"fmt"
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"strconv"
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"strings"
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)
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/*
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Copyright NetFoundry Inc.
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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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https://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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type VersionProvider interface {
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Version() string
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BuildDate() string
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Revision() string
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AsVersionInfo() *VersionInfo
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EncoderDecoder() VersionEncDec
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}
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type VersionEncDec interface {
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Encode(*VersionInfo) ([]byte, error)
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Decode([]byte) (*VersionInfo, error)
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}
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func init() {
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v, err := ParseSemVer("0.0.0")
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if err != nil {
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panic(err)
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}
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developmentVersion = v
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}
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var developmentVersion *SemVer
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func MustParseSemVer(version string) *SemVer {
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v, err := ParseSemVer(version)
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if err != nil {
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panic(err)
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}
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return v
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}
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func ParseSemVer(version string) (*SemVer, error) {
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result := &SemVer{}
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if err := result.parse(version); err != nil {
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return nil, err
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}
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return result, nil
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}
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type SemVer struct {
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parts []uint
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}
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func (self *SemVer) parse(version string) error {
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version = strings.TrimPrefix(version, "v")
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for _, part := range strings.Split(version, ".") {
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if err := self.parsePart(part); err != nil {
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return err
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}
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}
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return nil
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}
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func (self *SemVer) parsePart(part string) error {
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val, err := strconv.ParseInt(part, 10, 32)
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if err == nil {
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self.parts = append(self.parts, uint(val))
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}
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return err
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}
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func (self *SemVer) CompareTo(version *SemVer) int {
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for idx, part := range self.parts {
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if len(version.parts) < idx+1 {
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return 1
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}
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if part > version.parts[idx] {
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return 1
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}
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if part < version.parts[idx] {
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return -1
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}
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}
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if len(version.parts) > len(self.parts) {
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return -1
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}
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return 0
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}
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func (self *SemVer) Equals(version *SemVer) bool {
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return self.CompareTo(version) == 0
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}
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func (self *SemVer) String() string {
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if len(self.parts) == 0 {
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return ""
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}
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result := strings.Builder{}
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result.WriteString(fmt.Sprintf("%v", self.parts[0]))
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for _, part := range self.parts[1:] {
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result.WriteString(fmt.Sprintf(".%v", part))
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}
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return result.String()
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}
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type VersionInfo struct {
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Version string
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Revision string
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BuildDate string
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OS string
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Arch string
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}
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func (self *VersionInfo) GetVersion() (*SemVer, error) {
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return ParseSemVer(self.Version)
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}
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func (self *VersionInfo) HasMinimumVersion(compareVersionStr string) (bool, error) {
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if self == nil {
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return false, errors.New("version is nil")
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}
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compareVersion, err := ParseSemVer(compareVersionStr)
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if err != nil {
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return false, nil
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}
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version, err := self.GetVersion()
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if err != nil {
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return false, err
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}
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return version.CompareTo(compareVersion) >= 0 || version.Equals(developmentVersion), nil
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}
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type VersionEncDecImpl struct{}
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var StdVersionEncDec = VersionEncDecImpl{}
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func (encDec *VersionEncDecImpl) Encode(info *VersionInfo) ([]byte, error) {
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out := fmt.Sprintf("%v|%v|%v|%v|%v", info.Version, info.Revision, info.BuildDate, info.OS, info.Arch)
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return []byte(out), nil
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}
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func (encDec *VersionEncDecImpl) Decode(info []byte) (*VersionInfo, error) {
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values := strings.Split(string(info), "|")
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if len(values) != 5 {
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return nil, fmt.Errorf("could not parse version info, expected 5 values got %d", len(values))
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}
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return &VersionInfo{
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Version: values[0],
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Revision: values[1],
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BuildDate: values[2],
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OS: values[3],
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Arch: values[4],
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}, nil
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}
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