Add more PowerShell scripts for automating releases

.github/copilot-instructions.md

@@ -24,7 +24,7 @@ These instructions define how GitHub Copilot should assist with this project. Th
 > Notable `.editorconfig` rules: C/C++ files use 4-space indentation, `crlf` line endings, and `latin1` charset — avoid non-ASCII characters in source files.
 - **Documentation**: The project provides documentation on [Microsoft Learn](https://learn.microsoft.com/windows/win32/dxmath/directxmath-portal) with additional wiki pages available on [GitHub](https://github.com/microsoft/DirectXMath/wiki/). The project does **not** use Doxygen.
 - **Error Handling**: The majority of functions have no error conditions and do not throw C++ exceptions which is why they are marked `noexcept`. A few functions have `bool` results to indicate success or failure.
-- **Testing**: Unit tests for this project are implemented in this repository [Test Suite](https://github.com/walbourn/directxmathtest/) and can be run using CTest per the instructions at [Test Documentation](https://github.com/walbourn/directxmathtest/wiki). See [test copilot instructions](https://github.com/walbourn/directxmathtest/blob/main/.github/copilot-instructions.md) for additional information on the tests.
+- **Testing**: Unit tests for this project are implemented in a separate repository [Test Suite](https://github.com/walbourn/directxmathtest/) and can be run using CTest per the instructions at [Test Documentation](https://github.com/walbourn/directxmathtest/wiki). See [test copilot instructions](https://github.com/walbourn/directxmathtest/blob/main/.github/copilot-instructions.md) for additional information on the tests.
 - **Security**: This project uses secure coding practices from the Microsoft Secure Coding Guidelines, and is subject to the `SECURITY.md` file in the root of the repository.
 - **Dependencies**: The project has minimal dependencies, primarily relying on compiler intrinsics. It is designed to be self-contained and portable across different platforms and toolsets.
 - **Continuous Integration**: This project has 18 GitHub Actions workflows covering MSVC, Clang/LLVM, GCC (WSL), ARM64, Address Sanitizer, CodeQL, and super-linter. Workflows are in `.github/workflows/` and include compiler-specific builds (`msvc.yml`, `clangcl.yml`, `cxx.yml`), platform-specific builds (`arm64.yml`, `wsl.yml`), extension tests (`shmath.yml`, `xdsp.yml`), and static analysis (`codeql.yml`, `lint.yml`, `asan.yml`). Azure DevOps pipeline configurations are in `.azuredevops/`.
@@ -438,7 +438,7 @@ These were legacy types originally from xboxmath on the Xbox 360 which no longer
 
 - [Source git repository on GitHub](https://github.com/microsoft/DirectXMath.git)
 - [DirectXMath wiki git repository on GitHub](https://github.com/microsoft/DirectXMath.wiki.git)
-- [DirectXMath test suite git repository on GitHub](https://github.com/walbourn/directxmathtest.wiki.git).
+- [DirectXMath test suite git repository on GitHub](https://github.com/walbourn/directxmathtest.git)
 - [C++ Core Guidelines](https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines)
 - [Microsoft Secure Coding Guidelines](https://learn.microsoft.com/en-us/security/develop/secure-coding-guidelines)
 - [CMake Documentation](https://cmake.org/documentation/)
@@ -493,7 +493,7 @@ Use these established guards — do not invent new ones:
 | `_M_ARM64EC` | ARM64EC ABI (ARM64 code with x64 interop using ARM-NEON) for MSVC |
 | `__aarch64__` / `__x86_64__` / `__i386__` / `__powerpc64__` | Additional architecture-specific symbols for MinGW/GNUC (`#if`) |
 
-> `_M_ARM`/ `__arm__` is legacy 32-bit ARM which is deprecated.
+> `_M_ARM` / `__arm__` is legacy 32-bit ARM which is deprecated.
 
 ## Code Review Instructions
 
@@ -511,3 +511,27 @@ When reviewing code, focus on the following aspects:
 - Ensure that all public functions and classes are covered by unit tests located on [GitHub](https://github.com/walbourn/directxmathtest.git) where applicable. Report any gaps in test coverage.
 - Check for performance implications, especially in geometry processing algorithms.
 - Provide brutally honest feedback on code quality, design, and potential improvements as needed.
+
+## Release Process
+
+1. Ensure all changes are merged into the `main` branch and that all tests pass.
+2. Git pull the local repository to ensure it is up to date with the `main` branch.
+3. Run the PowerShell script `build\preparerelease.ps1` which will generate a topic branch for the release, update the version number in `CMakeLists.txt`, the `README.md` file, the release notes in the nuspec files, and create a stub in the `CHANGELOG.md` file for the new release.
+4. Edit the `CHANGELOG.md` file to update it with a summary of changes.
+5. Submit the topic branch for review and merge into `main` once approved. Allow the GitHub Actions workflows and the Azure DevOps pipelines to complete successfully before proceeding.
+6. Run the PowerShell script `build\completerelease.ps1` which will set a tag on the project repo and the test repo, and create a release on GitHub with the release notes from `CHANGELOG.md`. Ensure you have set up GPG signing for your GitHub account so that the tags will be verified.
+7. Git pull the local repository to ensure it is up to date with the `main` branch. Be sure to include `--tags`.
+8. Push the `main` branch to the MSCodeHub mirror repository. Be sure to include `--tags`.
+9. Create a PR on MSCodeHub from the `main` branch to the `release` branch.
+10. Merge the PR on MSCodeHub to update the release branch, which will trigger the Azure DevOps pipeline to build the NuGet package.
+11. Download the GitHub source .zip archive from the release. Unzip and compare to the local repo to ensure it matches — keep in mind there may be some CR/LF differences. Run minisign on the .zip to generate a signature file, and upload the signature file to the release assets.
+12. Run the PowerShell script `build\promotenuget.ps1` with the `-Release` parameter to promote the version to the Release view on the project-scoped ADO feed.
+13. Run the MSCodeHub pipeline to publish the NuGet package to nuget.org. The pipeline will automatically push the most recent package promoted to the Release view to nuget.org.
+14. Git pull a local repository of VCPKG to `d:\vcpkg` in sync with the `main` branch of the VCPKG repository.
+15. Run the PowerShell script `build\updatevcpkg.ps1` to update the DirectXMath port in VCPKG with the new release version. This will edit the files in `ports\directxmath`.
+16. Test the VCPKG port using all appropriate triplets and features.
+17. Run `.\vcpkg --x-add-version directxmath` to update the VCPKG versioning history.
+18. Submit a PR to the VCPKG GitHub repository to update the DirectXMath port. The PR will be reviewed and merged by the VCPKG maintainers.
+19. For the DirectXMath release to be included in the next Windows SDK, prepare a PR for the MSCodeHub project from the `main` branch to the `ms_sdk_release` branch. When the PR is complete, the Azure DevOps pipeline will automatically build vpack and submit a PR for further review.
+
+> When fully completed, be sure to update the GitHub release with links to the matching NuGet packages and the VCPKG port.

.github/linters/.powershell-psscriptanalyzer.psd1

@@ -1,5 +1,5 @@
 # PSScriptAnalyzerSettings.psd1
 @{
     Severity=@('Error','Warning')
-    ExcludeRules=@('PSAvoidUsingWriteHost')
+    ExcludeRules=@('PSAvoidUsingWriteHost', 'PSUseShouldProcessForStateChangingFunctions')
 }

build/completerelease.ps1

@@ -0,0 +1,275 @@
+<#
+
+.NOTES
+Copyright (c) Microsoft Corporation.
+Licensed under the MIT License.
+
+.SYNOPSIS
+Completes the release process by creating verified GitHub tags and a release.
+
+.DESCRIPTION
+Creates GPG-signed annotated tags on both the DirectXMath repository and the
+DirectXMath test suite repository (Tests/), then publishes a GitHub release on
+the DirectXMath repository using the signed tag.
+
+Tags are signed locally with 'git tag -s', which requires GPG signing to be
+configured in git and the signing key to be registered with GitHub. This
+produces the Verified badge in the GitHub UI.
+
+Run this script after the release PR (prepared by preparerelease.ps1) has been
+merged into the main branch.
+
+.PARAMETER PAT
+GitHub Personal Access Token with 'repo' scope, used to publish the GitHub
+release on microsoft/DirectXMath. Can also be provided via the GITHUB_TOKEN
+environment variable. If neither is provided, the script attempts to obtain a
+token from the 'gh' CLI.
+
+.PARAMETER SkipTestRepo
+If set, skips creating a tag on the test suite repository (Tests/).
+
+.PARAMETER WhatIf
+Shows what would happen without creating tags, pushing, or publishing a release.
+
+.LINK
+https://github.com/microsoft/DirectXMath/wiki
+
+#>
+
+[Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSAvoidUsingEmptyCatchBlock', '')]
+param(
+    [string]$PAT = "",
+    [switch]$SkipTestRepo,
+    [switch]$WhatIf
+)
+
+$reporoot  = Split-Path -Path $PSScriptRoot -Parent
+$readme    = Join-Path $reporoot "README.md"
+$history   = Join-Path $reporoot "CHANGELOG.md"
+$testsroot = Join-Path $reporoot "Tests"
+
+#--- Validate script location ---
+
+if ((-Not (Test-Path $readme)) -Or (-Not (Test-Path $history))) {
+    Write-Error "ERROR: Unexpected location of script file!" -ErrorAction Stop
+}
+
+#--- Validate local repo state ---
+
+$branch = git -C $reporoot branch --show-current
+if ($branch -ne "main") {
+    Write-Error "ERROR: Must be on the 'main' branch (currently on '$branch')!" -ErrorAction Stop
+}
+
+Write-Host "Fetching from origin..."
+git -C $reporoot fetch -q origin
+if ($LastExitCode -ne 0) {
+    Write-Error "ERROR: Failed to fetch from origin!" -ErrorAction Stop
+}
+
+$headHash   = git -C $reporoot rev-parse HEAD
+$remoteHash = git -C $reporoot rev-parse "origin/main"
+if ($headHash -ne $remoteHash) {
+    Write-Error "ERROR: Local 'main' is not in sync with origin. Run 'git pull' first." -ErrorAction Stop
+}
+
+#--- Derive release info from README.md ---
+
+$rawreleasedate = $(Get-Content $readme) | Select-String -Pattern "^## [A-Z][a-z]+ (?:\d+,?\s+)?\d{4}" | Select-Object -First 1
+if ([string]::IsNullOrEmpty($rawreleasedate)) {
+    Write-Error "ERROR: Failed to find a release date header in README.md!" -ErrorAction Stop
+}
+
+$releasename = ($rawreleasedate.ToString() -replace '^## ', '').Trim()
+
+try {
+    $releaseDateTime = [datetime]::Parse($releasename)
+}
+catch {
+    Write-Error "ERROR: Failed to parse release date '$releasename': $_" -ErrorAction Stop
+}
+
+$releasetag = (Get-Date -Date $releaseDateTime -Format "MMMyyyy").ToLower()
+
+Write-Host "  Release Name: $releasename"
+Write-Host "   Release Tag: $releasetag"
+
+#--- Extract release notes from CHANGELOG.md ---
+
+$changelog  = Get-Content $history
+$notesStart = -1
+$notesEnd   = $changelog.Count - 1
+
+for ($i = 0; $i -lt $changelog.Count; $i++) {
+    if ($changelog[$i] -match "^### $([regex]::Escape($releasename))") {
+        $notesStart = $i + 1
+    }
+    elseif ($notesStart -ge 0 -and $changelog[$i] -match "^### ") {
+        $notesEnd = $i - 1
+        break
+    }
+}
+
+if ($notesStart -lt 0) {
+    Write-Error "ERROR: Could not find release notes for '$releasename' in CHANGELOG.md!" -ErrorAction Stop
+}
+
+$releaseNotes = (($changelog[$notesStart..$notesEnd] | Where-Object { $_ -ne "" }) -join "`n").Trim()
+
+Write-Host "Release Notes:"
+Write-Host $releaseNotes
+Write-Host ""
+
+#--- Acquire GitHub token ---
+
+if ($PAT.Length -eq 0) {
+    $PAT = [string]$env:GITHUB_TOKEN
+}
+
+if ($PAT.Length -eq 0) {
+    try {
+        $ghToken = & gh auth token 2>$null
+        if ($LASTEXITCODE -eq 0 -and -not [string]::IsNullOrWhiteSpace($ghToken)) {
+            $PAT = $ghToken.Trim()
+            Write-Host "Using token from 'gh' CLI."
+        }
+    }
+    catch {
+        # gh CLI not available
+    }
+}
+
+if ($PAT.Length -eq 0) {
+    Write-Error "ERROR: No GitHub token found. Provide -PAT, set GITHUB_TOKEN, or sign in with 'gh auth login'." -ErrorAction Stop
+}
+
+$apiHeaders = @{
+    "Accept"               = "application/vnd.github+json"
+    "Authorization"        = "Bearer $PAT"
+    "X-GitHub-Api-Version" = "2022-11-28"
+}
+
+#--- Helper: create a GPG-signed tag locally and push it ---
+
+function Push-SignedTag {
+    param(
+        [Parameter(Mandatory)] [string]$RepoPath,
+        [Parameter(Mandatory)] [string]$TagName,
+        [Parameter(Mandatory)] [string]$Message
+    )
+
+    # Check whether the tag already exists locally
+    $existing = git -C $RepoPath tag -l $TagName
+    if (-not [string]::IsNullOrEmpty($existing)) {
+        Write-Error "ERROR: Tag '$TagName' already exists in '$RepoPath'!" -ErrorAction Stop
+    }
+
+    if ($WhatIf) {
+        Write-Host "[WhatIf] Would create signed tag '$TagName' in '$RepoPath' and push to origin"
+        return
+    }
+
+    Write-Host "Creating signed tag '$TagName'..."
+    git -C $RepoPath tag -s $TagName -m $Message
+    if ($LastExitCode -ne 0) {
+        Write-Error "ERROR: Failed to create signed tag '$TagName'. Ensure GPG signing is configured." -ErrorAction Stop
+    }
+
+    Write-Host "Pushing tag '$TagName' to origin..."
+    git -C $RepoPath push origin $TagName
+    if ($LastExitCode -ne 0) {
+        git -C $RepoPath tag -d $TagName 2>$null
+        Write-Error "ERROR: Failed to push tag '$TagName' to origin." -ErrorAction Stop
+    }
+}
+
+#--- Helper: create a GitHub release ---
+
+function New-GitHubRelease {
+    param(
+        [Parameter(Mandatory)] [string]$Owner,
+        [Parameter(Mandatory)] [string]$Repo,
+        [Parameter(Mandatory)] [string]$TagName,
+        [Parameter(Mandatory)] [string]$ReleaseName,
+        [Parameter(Mandatory)] [string]$ReleaseBody
+    )
+
+    # Check whether a release already exists for this tag
+    $checkUri = "https://api.github.com/repos/$Owner/$Repo/releases/tags/$TagName"
+    $releaseExists = $false
+
+    try {
+        $null = Invoke-RestMethod -Uri $checkUri -Method Get -Headers $apiHeaders -ErrorAction Stop
+        $releaseExists = $true
+    }
+    catch {
+        $sc = $null
+        try { $sc = [int]$_.Exception.Response.StatusCode } catch { }
+        if ($sc -ne 404) {
+            Write-Error "ERROR: Failed to check for existing release '$TagName' on ${Owner}/${Repo}: $_" -ErrorAction Stop
+        }
+        # 404 = no release exists yet, which is expected
+    }
+
+    if ($releaseExists) {
+        Write-Error "ERROR: Release '$TagName' already exists on ${Owner}/${Repo}!" -ErrorAction Stop
+    }
+
+    if ($WhatIf) {
+        Write-Host "[WhatIf] Would create release '$TagName' on ${Owner}/${Repo}"
+        return
+    }
+
+    $payload = @{
+        tag_name    = $TagName
+        name        = $ReleaseName
+        body        = $ReleaseBody
+        draft       = $false
+        prerelease  = $false
+        make_latest = "true"
+    } | ConvertTo-Json
+
+    Write-Host "Creating release '$TagName' on ${Owner}/${Repo}..."
+
+    try {
+        $result = Invoke-RestMethod -Uri "https://api.github.com/repos/$Owner/$Repo/releases" `
+            -Method Post -Headers $apiHeaders -Body $payload -ContentType "application/json" -ErrorAction Stop
+        Write-Host "  Created: $($result.html_url)"
+    }
+    catch {
+        Write-Error "ERROR: Failed to create release '$TagName' on ${Owner}/${Repo}: $_" -ErrorAction Stop
+    }
+}
+
+#--- Create verified tag and release on microsoft/DirectXMath ---
+
+Push-SignedTag -RepoPath $reporoot -TagName $releasetag -Message $releasename
+
+New-GitHubRelease `
+    -Owner         "microsoft" `
+    -Repo          "DirectXMath" `
+    -TagName       $releasetag `
+    -ReleaseName   $releasename `
+    -ReleaseBody   $releaseNotes
+
+#--- Create verified tag on walbourn/directxmathtest ---
+
+if (-Not $SkipTestRepo) {
+    if (-Not (Test-Path $testsroot)) {
+        Write-Warning "WARNING: Tests/ folder not found at '$testsroot'. Skipping test suite tag."
+    }
+    else {
+        Push-SignedTag -RepoPath $testsroot -TagName $releasetag -Message $releasename
+    }
+}
+
+#--- Done ---
+
+if (-Not $WhatIf) {
+    Write-Host ""
+    Write-Host "Release complete. Sync the new tags locally with:"
+    Write-Host "  git pull --tags"
+    if (-Not $SkipTestRepo) {
+        Write-Host "  git -C Tests pull --tags"
+    }
+}