108 lines
3.6 KiB
PowerShell
108 lines
3.6 KiB
PowerShell
<#
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.DESCRIPTION
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Parses a semver version string into its components and supports operations around it that we use for versioning our packages.
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See https://azure.github.io/azure-sdk/policies_releases.html#package-versioning
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Example: 1.2.3-preview.4
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Components: Major.Minor.Patch-PrereleaseLabel.PrereleaseNumber
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Note: A builtin Powershell version of SemVer exists in 'System.Management.Automation'. At this time, it does not parsing of PrereleaseNumber. It's name is also type accelerated to 'SemVer'.
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#>
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class AzureEngSemanticVersion {
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[int] $Major
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[int] $Minor
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[int] $Patch
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[string] $PrereleaseLabel
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[int] $PrereleaseNumber
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[bool] $IsPrerelease
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[string] $RawVersion
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static [AzureEngSemanticVersion] ParseVersionString([string] $versionString)
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{
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try {
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return [AzureEngSemanticVersion]::new($versionString)
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}
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catch {
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return $null
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}
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}
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AzureEngSemanticVersion([string] $versionString){
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# Regex inspired but simplifie from https://semver.org/#is-there-a-suggested-regular-expression-regex-to-check-a-semver-string
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$SEMVER_REGEX = "^(?<major>0|[1-9]\d*)\.(?<minor>0|[1-9]\d*)\.(?<patch>0|[1-9]\d*)(?:-?(?<prelabel>[a-zA-Z-]*)(?:\.?(?<prenumber>0|[1-9]\d*)))?$"
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if ($versionString -match $SEMVER_REGEX) {
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if ($null -eq $matches['prelabel']) {
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# artifically provide these values for non-prereleases to enable easy sorting of them later than prereleases.
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$prelabel = "zzz"
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$prenumber = 999;
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$isPre = $false;
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}
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else {
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$prelabel = $matches["prelabel"]
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$prenumber = [int]$matches["prenumber"]
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$isPre = $true;
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}
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$this.Major = [int]$matches.Major
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$this.Minor = [int]$matches.Minor
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$this.Patch = [int]$matches.Patch
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$this.PrereleaseLabel = $prelabel
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$this.PrereleaseNumber = $prenumber
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$this.IsPrerelease = $isPre
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$this.RawVersion = $versionString
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}
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else
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{
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throw "Invalid version string: '$versionString'"
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}
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}
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# If a prerelease label exists, it must be 'preview', and similar semantics used in our release guidelines
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# See https://azure.github.io/azure-sdk/policies_releases.html#package-versioning
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[bool] HasValidPrereleaseLabel(){
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if ($this.IsPrerelease -eq $true) {
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if ($this.PrereleaseLabel -ne 'preview') {
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Write-Error "Unexpected pre-release identifier '$this.PrereleaseLabel', should be 'preview'"
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return $false;
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}
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if ($this.PrereleaseNumber -lt 1)
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{
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Write-Error "Unexpected pre-release version '$this.PrereleaseNumber', should be >= '1'"
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return $false;
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}
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}
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return $true;
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}
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[string] ToString(){
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if ($this.IsPrerelease -eq $false)
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{
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$versionString = "{0}.{1}.{2}" -F $this.Major, $this.Minor, $this.Patch
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}
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else
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{
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$versionString = "{0}.{1}.{2}-{3}.{4}" -F $this.Major, $this.Minor, $this.Patch, $this.PrereleaseLabel, $this.PrereleaseNumber
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}
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return $versionString;
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}
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[void] IncrementAndSetToPrerelease(){
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if ($this.IsPrerelease -eq $false)
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{
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$this.PrereleaseLabel = 'preview'
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$this.PrereleaseNumber = 1
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$this.Minor++
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$this.Patch = 0
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$this.IsPrerelease = $true
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}
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else
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{
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$this.PrereleaseNumber++
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}
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}
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}
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