Add release preparation script

eng/scripts/Prepare-Release.ps1

@@ -0,0 +1,215 @@
+[CmdletBinding()]
+param(
+    [Parameter(Mandatory=$true)]
+    $package
+)
+
+function Get-LevenshteinDistance {
+    <#
+        .SYNOPSIS
+            Get the Levenshtein distance between two strings.
+        .DESCRIPTION
+            The Levenshtein Distance is a way of quantifying how dissimilar two strings (e.g., words) are to one another by counting the minimum number of operations required to transform one string into the other.
+        .EXAMPLE
+            Get-LevenshteinDistance 'kitten' 'sitting'
+        .LINK
+            http://en.wikibooks.org/wiki/Algorithm_Implementation/Strings/Levenshtein_distance#C.23
+            http://en.wikipedia.org/wiki/Edit_distance
+            https://communary.wordpress.com/
+            https://github.com/gravejester/Communary.PASM
+        .NOTES
+            Author: Øyvind Kallstad
+            Date: 07.11.2014
+            Version: 1.0
+    #>
+    [CmdletBinding()]
+    param(
+        [Parameter(Position = 0)]
+        [string]$String1,
+
+        [Parameter(Position = 1)]
+        [string]$String2,
+
+        # Makes matches case-sensitive. By default, matches are not case-sensitive.
+        [Parameter()]
+        [switch] $CaseSensitive,
+
+        # A normalized output will fall in the range 0 (perfect match) to 1 (no match).
+        [Parameter()]
+        [switch] $NormalizeOutput
+    )
+
+    if (-not($CaseSensitive)) {
+        $String1 = $String1.ToLowerInvariant()
+        $String2 = $String2.ToLowerInvariant()
+    }
+
+    $d = New-Object 'Int[,]' ($String1.Length + 1), ($String2.Length + 1)
+    for ($i = 0; $i -le $d.GetUpperBound(0); $i++) {
+        $d[$i,0] = $i
+    }
+
+    for ($i = 0; $i -le $d.GetUpperBound(1); $i++) {
+        $d[0,$i] = $i
+    }
+
+    for ($i = 1; $i -le $d.GetUpperBound(0); $i++) {
+        for ($j = 1; $j -le $d.GetUpperBound(1); $j++) {
+            $cost = [Convert]::ToInt32((-not($String1[$i–1] -ceq $String2[$j–1])))
+            $min1 = $d[($i–1),$j] + 1
+            $min2 = $d[$i,($j–1)] + 1
+            $min3 = $d[($i–1),($j–1)] + $cost
+            $d[$i,$j] = [Math]::Min([Math]::Min($min1,$min2),$min3)
+        }
+    }
+
+    $distance = ($d[$d.GetUpperBound(0),$d.GetUpperBound(1)])
+
+    if ($NormalizeOutput) {
+        return (1 – ($distance) / ([Math]::Max($String1.Length,$String2.Length)))
+    }
+
+    else {
+        return $distance
+    }
+}
+
+$ErrorPreference = 'Stop'
+$repoRoot = Resolve-Path "$PSScriptRoot/../..";
+
+if (!(Get-Command az)) {
+  throw 'You must have the Azure CLI installed: https://aka.ms/azure-cli'
+}
+
+. ${repoRoot}\eng\common\scripts\SemVer.ps1
+. ${repoRoot}\eng\common\scripts\ChangeLog-Operations.ps1
+
+$packageDirectory = Get-ChildItem "$repoRoot/sdk" -Directory -Recurse -Depth 2 -Filter $package
+$serviceDirectory = $packageDirectory.Parent.Name
+
+Write-Host "Source directory $serviceDirectory"
+
+$existing = Invoke-WebRequest "https://api.nuget.org/v3-flatcontainer/$($package.ToLower())/index.json" | ConvertFrom-Json;
+
+$libraryType = "Preview";
+$latestVersion = "unknown";
+foreach ($existingVersion in $existing.versions)
+{
+    $parsedVersion = [AzureEngSemanticVersion]::new($existingVersion)
+    if (!$parsedVersion.IsPrerelease)
+    {
+        $libraryType = "GA"
+    }
+
+    $latestVersion = $existingVersion;
+}
+
+$currentProjectVersion = ([xml](Get-Content "$packageDirectory/src/*.csproj")).Project.PropertyGroup.Version
+
+Write-Host
+Write-Host "Latest released version $latestVersion, library type $libraryType" -ForegroundColor Green
+
+$newVersion = Read-Host -Prompt "Input the new version or press Enter to use use current project version '$currentProjectVersion'"
+
+if (!$newVersion)
+{
+    $newVersion = $currentProjectVersion;
+}
+
+$releaseType = "None";
+$parsedNewVersion = [AzureEngSemanticVersion]::new($newVersion)
+if ($parsedNewVersion.Major -ne $parsedVersion.Major)
+{
+    $releaseType = "Major"
+}
+elseif ($parsedNewVersion.Minor -ne $parsedVersion.Minor)
+{
+    $releaseType = "Minor"
+}
+elseif ($parsedNewVersion.Patch -ne $parsedVersion.Patch)
+{
+    $releaseType = "Bugfix"
+}
+elseif ($parsedNewVersion.IsPrerelease)
+{
+    $releaseType = "Bugfix"
+}
+
+Write-Host
+Write-Host "Detected released type $releaseType" -ForegroundColor Green
+
+Write-Host
+Write-Host "Updating versions" -ForegroundColor Green
+
+& "$repoRoot\eng\scripts\Update-PkgVersion.ps1" -ServiceDirectory $serviceDirectory -PackageName $package -NewVersionString $newVersion
+
+$date = Get-Date
+$month = $date.ToString("MMMM")
+if ($date.Day -gt 15)
+{
+    $month = $date.AddMonths(1).ToString("MMMM")
+}
+Write-Host
+Write-Host "Assuming release is in $month" -ForegroundColor Green
+
+$commonParameter = @("--organization", "https://dev.azure.com/azure-sdk", "-o", "json", "--only-show-errors")
+
+$workItems = az boards query @commonParameter --project Release --wiql "SELECT [ID], [State], [Iteration Path], [Title] FROM WorkItems WHERE [State] <> 'Closed' AND [Iteration Path] under 'Release\2020\$month' AND [Title] contains '.NET'" | ConvertFrom-Json;
+
+Write-Host
+Write-Host "The following work items exist:"
+foreach ($item in $workItems)
+{
+    $id = $item.fields."System.ID";
+    $title = $item.fields."System.Title";
+    $path = $item.fields."System.IterationPath";
+    Write-Host "$id - $path - $title" 
+}
+
+# Sort using fuzzy match
+$workItems = $workItems | Sort-Object -property @{Expression = { Get-LevenshteinDistance $_.fields."System.Title" $package -NormalizeOutput }}
+$mostProbable = $workItems | Select-Object -Last 1
+
+$issueId = Read-Host -Prompt "Input the work item ID or press Enter to use '$($mostProbable.fields."System.ID") - $($mostProbable.fields."System.Title")'"
+
+if (!$issueId)
+{
+    $issueId = $mostProbable.fields."System.ID"
+}
+
+$fields = @{
+    "Permalink usetag"="https://github.com/Azure/azure-sdk-for-net/sdk/$serviceDirectory/$package/README.md"
+    "Package Registry Permalink"="https://nuget.org/packages/$package/$newVersion"
+    "Library Type"=$libraryType
+    "Release Type"=$releaseType
+    "Version Number"=$newVersion
+}
+
+Write-Host
+Write-Host "Going to set the following fields:" -ForegroundColor Green
+
+foreach ($field in $fields.Keys)
+{
+    Write-Host "    $field = $($fields[$field])"
+}
+
+$decision = $Host.UI.PromptForChoice("Updating work item https://dev.azure.com/azure-sdk/Release/_workitems/edit/$issueId", 'Are you sure you want to proceed?', @('&Yes'; '&No'), 0)
+
+if ($decision -eq 0)
+{
+    az boards work-item update @commonParameter --id $issueId --state Active > $null
+    foreach ($field in $fields.Keys)
+    {
+        az boards work-item update @commonParameter --id $issueId -f "$field=$($fields[$field])" > $null
+    }
+}
+
+$changeLogEntry = Get-ChangeLogEntry -ChangeLogLocation "$packageDirectory/CHANGELOG.md" -VersionString $newVersion
+
+$githubAnchor = $changeLogEntry.ReleaseTitle.Replace("## ", "").Replace(".", "").Replace("(", "").Replace(")", "").Replace(" ", "-")
+Write-Host
+Write-Host "Snippet for the centralized CHANGELOG:" -ForegroundColor Green
+Write-Host "dotnet add package $package --version $newVersion"
+Write-Host "### $package [Changelog](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/$serviceDirectory/$package/CHANGELOG.md#$githubAnchor)"
+$changeLogEntry.ReleaseContent | Write-Host 
+