Added Powershell script to run the Release Audit Tool

Author: NightOwl888

.gitignore

@@ -396,4 +396,24 @@ FodyWeavers.xsd
 
 # JetBrains Rider
 *.sln.iml
+
+###########################################
+#                 Custom
+###########################################
+
+# BeyondCompare .orig files (when doing conflict resolution)
+*.orig
+
+# Build artifacts
+_artifacts/
+
+# Rider / ReSharper
 .idea/
+*.sln.iml
+
+# Rider - allow shared inspection + code style profiles
+!.idea/.idea.SPDX.CodeAnalysis/.idea/inspectionProfiles/
+!.idea/.idea.SPDX.CodeAnalysis/.idea/codeStyles/
+
+# Custom Tools
+.tools/*

.rat-excludes

@@ -0,0 +1,17 @@
+# Note: these patterns are applied to single files or directories, not full paths
+# coverage/* will ignore any coverage dir, but airflow/www/static/coverage/* will match nothing
+
+.git/*
+.rat-excludes
+.gitignore
+.gitattributes
+
+# Exclude build assets
+lib/*
+obj/*
+bin/*
+_artifacts/*
+_site/*
+
+# Exclude auto-generated designers
+.*\.Designer\.cs

rat.ps1

@@ -0,0 +1,114 @@
+<#
+    Licensed to the Apache Software Foundation (ASF) under one or more
+    contributor license agreements.  See the NOTICE file distributed with
+    this work for additional information regarding copyright ownership.
+    The ASF licenses this file to You under the Apache License, Version 2.0
+    (the "License"); you may not use this file except in compliance with
+    the License.  You may obtain a copy of the License at
+
+         https://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+#>
+
+<#
+.SYNOPSIS
+    Helper script to download and run the Apache Release Audit Tool (RAT).
+
+.DESCRIPTION
+    This script automates use of the Apache RAT tool during release preparation.
+    It ensures that the RAT JAR is available locally (downloading it if needed)
+    and then runs it against the source tree to check for missing license headers
+    and other compliance issues.
+
+    By default, the tool is downloaded into a `.tools/rat` directory located next
+    to this script. The script always runs RAT with the repository root (same
+    directory as this script) as the target directory.
+
+.PARAMETER Version
+    The version of Apache RAT to use (default: 0.16).
+
+.PARAMETER ExcludeFileName
+    Name of an exclude file containing path patterns that RAT should ignore.
+    This file should be located next to the script. Default: rat-exclude.txt
+
+.REQUIREMENTS
+    - Java 8+ must be installed and available on the PATH.
+    - Internet connection (for first run, to download RAT).
+
+.EXAMPLE
+    pwsh ./rat.ps1
+
+    Runs Apache RAT (default version 0.16) with exclusions from `rat-exclude.txt`.
+
+.EXAMPLE
+    pwsh ./rat.ps1 -Version 0.16 -ExcludeFileName custom-exclude.txt
+
+    Runs Apache RAT version 0.16 using the specified exclude file.
+
+.NOTES
+    This script is intended for use by release managers when preparing official
+    ASF releases. It is not normally required for day-to-day development.
+#>
+param(
+    [string]$Version = "0.16",
+    [string]$ExcludeFileName = ".rat-excludes"
+)
+
+# Script directory (works in PowerShell Core and Windows PowerShell)
+$scriptDir = $PSScriptRoot
+
+# Tool paths (kept under the script dir)
+$ratDir = Join-Path $scriptDir ".tools\rat"
+$ratJar = Join-Path $ratDir "apache-rat-$Version.jar"
+$ratUrl = "https://repo1.maven.org/maven2/org/apache/rat/apache-rat/$Version/apache-rat-$Version.jar"
+
+# Exclude file path (resolved relative to script dir)
+$ratExcludeFile = Join-Path $scriptDir $ExcludeFileName
+
+# Ensure tool folder exists and jar is present (download if missing)
+if (-not (Test-Path $ratDir)) {
+    New-Item -ItemType Directory -Path $ratDir | Out-Null
+}
+
+if (-not (Test-Path $ratJar)) {
+    Write-Host "Downloading Apache RAT $Version to $ratJar ..."
+    Invoke-WebRequest -Uri $ratUrl -OutFile $ratJar
+}
+
+# If exclude file is optional, optionally warn if missing:
+if (-not (Test-Path $ratExcludeFile)) {
+    Write-Host "Warning: exclude file '$ratExcludeFile' not found. Continuing without --exclude-file."
+    $useExclude = $false
+} else {
+    $useExclude = $true
+}
+
+# Run from the script directory so '.' means the repository root next to this script
+Push-Location $scriptDir
+try {
+    $argsList = @(
+        "-jar", $ratJar,
+        "--dir", ".",
+        "--addLicense",
+        "--force"
+    )
+
+    if ($useExclude) {
+        $argsList += @("--exclude-file", $ratExcludeFile)
+    }
+
+    # Call java with argument list. Use & to invoke program.
+    & java @argsList
+
+    if ($LASTEXITCODE -ne 0) {
+        throw "RAT exited with code $LASTEXITCODE"
+    }
+}
+finally {
+    Pop-Location
+}