Update global assemblyinfo with build number

update-global-assemblyinfo.ps1

$assemblyFile = "$env:APPVEYOR_BUILD_FOLDER\src\GlobalAssemblyInfo.cs"

$regex = new-object System.Text.RegularExpressions.Regex ('(AssemblyInformationalVersion(Attribute)?\s*\(\s*\")(.*)(\"\s*\))', 
         [System.Text.RegularExpressions.RegexOptions]::MultiLine)

$content = [IO.File]::ReadAllText($assemblyFile)

$version = $null
$match = $regex.Match($content)
if($match.Success) {
    $version = $match.groups[3].value
}

# new version
$version = "$version.$env:APPVEYOR_BUILD_NUMBER"

# update assembly info
$content = $regex.Replace($content, '${1}' + $version + '${4}')
[IO.File]::WriteAllText($assemblyFile, $content)

# update AppVeyor build
Update-AppveyorBuild -Version $version

I totally agree @ma499

@FeodorFitsner do you guys have a kinda usable "AppVeyor-Contrib" repo? Great place to consolidate things like this!