Added some helper scripts (#660)

build/downloadbuild.ps1

@@ -0,0 +1,146 @@
+<#
+
+.NOTES
+Copyright (c) Microsoft Corporation.
+Licensed under the MIT License.
+
+.SYNOPSIS
+Downloads build artifacts from Azure DevOps for DirectXTex.
+
+.DESCRIPTION
+This script is used as part of the internal release process for DirectXTex.
+
+.PARAMETER BuildId
+This is the specific build to get artifacts from.
+
+.PARAMETER PAT
+Requires an ADO PAT with 'Build > Read' scope. Can be provided via the ADO_PERSONAL_ACCESS_TOKEN environment variable or as a parameter.
+
+.LINK
+https://github.com/microsoft/DirectXTex/wiki
+
+#>
+
+param(
+    [Parameter(Mandatory)]
+    [int]$BuildId,
+    [string]$PAT = ""
+)
+
+# Parse PAT
+if ($PAT.Length -eq 0) {
+    $PAT = $env:ADO_PERSONAL_ACCESS_TOKEN
+
+    if ($PAT.Length -eq 0) {
+        Write-Error "##[error]This script requires a valid ADO Personal Access Token!" -ErrorAction Stop
+    }
+}
+
+# Initial REST query
+$headers = @{
+    "Content-Type" = "application/json"
+    Authorization = "Basic " + [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(":$PAT"))
+}
+
+$uriFormat = "https://dev.azure.com/MSCodeHub/ca4f06c8-d88d-40fb-ada3-b70b24a98714/_apis/build/builds/{0}/artifacts?artifactName={1}&api-version=7.1"
+
+$uriarm64 = $uriFormat -f $BuildId, "DirectXTex_Binaries_Release_ARM64"
+$uriamd64 = $uriFormat -f $BuildId, "DirectXTex_Binaries_Release_x64"
+
+try
+{
+    Write-Host "Checking if build and artifacts exist..."
+    $responseamd64 = Invoke-RestMethod -Uri $uriamd64 -Method Get -Headers $headers
+    $responsearm64 = Invoke-RestMethod -Uri $uriarm64 -Method Get -Headers $headers
+}
+catch
+{
+    Write-Error "##[error]Build $BuildId not found!" -ErrorAction Continue
+}
+
+$ProgressPreference = 'SilentlyContinue'
+
+$tempFolderPath = Join-Path $Env:Temp $(New-Guid)
+New-Item -Type Directory -Path $tempFolderPath | Out-Null
+
+Write-Host $tempFolderPath
+
+$headers = @{
+    Authorization = "Basic " + [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(":$PAT"))
+    Accept = "application/zip"
+}
+
+Add-Type -A System.IO.Compression.FileSystem
+
+# Download artifacts for ARM64
+foreach ($artifact in $responsearm64) {
+    $artifactName = $artifact.name
+    $downloadUrl = $artifact.resource.downloadUrl
+    $outputFile = Join-Path $tempFolderPath "$artifactName.zip"
+
+    try
+    {
+        Write-Host "Downloading $artifactName to $outputFile..."
+        Invoke-WebRequest -Uri $downloadUrl -Headers $headers -OutFile $outputFile
+    }
+    catch
+    {
+        Write-Error "##[error]Failed to download $artifactName!" -ErrorAction Continue
+    }
+
+    try
+    {
+        Write-Host "Extracting $artifactName..."
+        [IO.Compression.ZipFile]::ExtractToDirectory($outputFile, $tempFolderPath)
+    }
+    catch
+    {
+        Write-Error "##[error]Failed to extract $artifactName!" -ErrorAction Continue
+    }
+}
+
+# Download artifacts for X64
+foreach ($artifact in $responseamd64) {
+    $artifactName = $artifact.name
+    $downloadUrl = $artifact.resource.downloadUrl
+    $outputFile = Join-Path $tempFolderPath "$artifactName.zip"
+
+    try
+    {
+        Write-Host "Downloading $artifactName to $outputFile..."
+        Invoke-WebRequest -Uri $downloadUrl -Headers $headers -OutFile $outputFile
+    }
+    catch
+    {
+        Write-Error "##[error]Failed to download $artifactName!" -ErrorAction Continue
+    }
+
+    try
+    {
+        Write-Host "Extracting $artifactName..."
+        [IO.Compression.ZipFile]::ExtractToDirectory($outputFile, $tempFolderPath)
+    }
+    catch
+    {
+        Write-Error "##[error]Failed to extract $artifactName!" -ErrorAction Continue
+    }
+}
+
+# Extract command-line tool binaries
+$exes = @(
+    "Texassemble",
+    "Texconv",
+    "Texdiag"
+) 
+
+$binPath = Join-Path $tempFolderPath "DirectXTex_Binaries_Release_ARM64"
+foreach ($exe in $exes) {
+    $srcPath = "{0}\{1}\Bin\Desktop_2022_Win10\ARM64\Release\{1}_arm64.exe" -f $binPath, $exe
+    Copy-Item -Path $srcPath -Destination "." -ErrorAction Stop
+}
+
+$binPath = Join-Path $tempFolderPath "DirectXTex_Binaries_Release_x64"
+foreach ($exe in $exes) {
+    $srcPath = "{0}\{1}\Bin\Desktop_2022\x64\Release\{1}.exe" -f $binPath, $exe
+    Copy-Item -Path $srcPath -Destination "." -ErrorAction Stop
+}