137 строки
4.7 KiB
Go
137 строки
4.7 KiB
Go
/*
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_____ _____ _____ ____ ______ _____ ------
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| --- | | | | |-----| |---- | | |-----| |----- ------
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| ____| |_____ | ____| | ____| | |_____| _____| |_____ |_____
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Licensed under the MIT License <http://opensource.org/licenses/MIT>.
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Copyright © 2020-2024 Microsoft Corporation. All rights reserved.
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Author : <blobfusedev@microsoft.com>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE
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*/
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package common
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import (
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"errors"
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"strconv"
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"strings"
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)
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const Blobfuse2ListContainerURL = "https://blobfuse2.blob.core.windows.net/release"
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const BlobFuse2WarningsURL = "https://aka.ms/blobfuse2warnings"
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const BlobFuse2BlockingURL = "https://aka.ms/blobfuse2blockers"
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type Version struct {
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segments []int64
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preview bool
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original string
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}
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// To keep the code simple, we assume we only use a simple subset of semantic versions.
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// Namely, the version is either a normal stable version, or a pre-release version with '~preview' or '-preview' attached.
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// Examples: 10.1.0, 11.2.0-preview.1, 11.2.0~preview.1
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func ParseVersion(raw string) (*Version, error) {
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const standardError = "invalid version string"
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rawSegments := strings.Split(raw, ".")
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if !(len(rawSegments) == 3 || (len(rawSegments) == 4 && (strings.Contains(rawSegments[2], "-") || strings.Contains(rawSegments[2], "~")))) {
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return nil, errors.New(standardError)
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}
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v := &Version{segments: make([]int64, 4), original: raw}
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for i, str := range rawSegments {
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//For any case such as SemVer-preview.1, SemVer-beta.1, SemVer-alpha.1 this would be true, and we assume the version to be a preview version.
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if strings.Contains(str, "-") || strings.Contains(str, "~") {
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if i != 2 {
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return nil, errors.New(standardError)
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}
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v.preview = true
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//Splitting the string into two pieces and extracting SemVer which is always at 0th index
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str = strings.Split(strings.Split(str, "-")[0], "~")[0]
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}
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val, err := strconv.ParseInt(str, 10, 64)
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if err != nil {
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return nil, errors.New(standardError)
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}
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v.segments[i] = val
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}
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return v, nil
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}
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// compare this version (v) to another version (v2)
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// return -1 if v is smaller/older than v2
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// return 0 if v is equal to v2
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// return 1 if v is bigger/newer than v2
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func (v Version) compare(v2 Version) int {
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// short-circuit if the two version have the exact same raw string, no need to compare
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if v.original == v2.original {
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return 0
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}
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// TODO: Make sure preview version is smaller than GA version
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// compare the major/minor/patch version
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// if v has a bigger number, it is newer
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for i := 0; i < 3; i++ {
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if v.segments[i] > v2.segments[i] {
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return 1
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} else if v.segments[i] < v2.segments[i] {
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return -1
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}
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}
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// if both or neither versions are previews, then they are equal
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// usually this shouldn't happen since we already checked whether the two versions have equal raw string
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// however, it is entirely possible that we have new kinds of pre-release versions that this code is not parsing correctly
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// in this case we consider both pre-release version equal anyways
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if v.preview && v2.preview {
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if v.segments[3] > v2.segments[3] {
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return 1
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} else if v.segments[3] < v2.segments[3] {
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return -1
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} else {
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return 0
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}
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} else if !v.preview && !v2.preview {
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return 0
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} else if v.preview && !v2.preview {
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return -1
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}
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return 1
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}
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// detect if version v is older than v2
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func (v Version) OlderThan(v2 Version) bool {
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return v.compare(v2) == -1
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}
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// detect if version v is newer than v2
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func (v Version) NewerThan(v2 Version) bool {
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return v.compare(v2) == 1
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}
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