internal/Invoke-TagCommand.ps1

function Invoke-TagCommand ([string]$Tag, [string]$Keyword)
{
<#
.SYNOPSIS
    An internal command, feel free to ignore.
     
.EXAMPLE
    Tag-Command -Tag Restore -Keyword Restore
    Tag-Command -Tag Backup -Keyword Backup
    Tag-Command -Tag Orphan -Keyword Orphan
    Tag-Command -Tag DisasterRecovery -Keyword Attach
    Tag-Command -Tag DisasterRecovery -Keyword Detach
    Tag-Command -Tag Snapshot -Keyword Snapshot
    Tag-Command -Tag Memory -Keyword Memory
    Tag-Command -Tag DisasterRecovery -Keyword Restore
    Tag-Command -Tag DisasterRecovery -Keyword Backup
    Tag-Command -Tag Storage -Keyword disk
    Tag-Command -Tag Storage -Keyword storage
    Tag-Command -Tag Migration -Keyword "Copy-"
    Tag-Command -Tag SPN -Keyword Kerberos
    Tag-Command -Tag SPN -Keyword SPN
    Tag-Command -Tag CIM -Keyword CimSession
    Tag-Command -Tag SQLWMI -Keyword Invoke-ManagedComputerCommand
    Tag-Command -Tag WSMan -Keyword Invoke-Command
 
#>

    
    $tagsRex = ([regex]'(?m)^[\s]{0,15}Tags:(.*)$')
    $modulepath = (Get-Module -Name dbatools).Path
    $directory = Split-Path $modulepath
    $basedir = "$directory\functions\"
    Import-Module $modulepath -force
    $allfiles = Get-ChildItem $basedir
    foreach ($f in $allfiles)
    {
        if ($f -eq "Find-DbaCommand.ps1") { continue }
        
        $content = Get-Content $f.fullname
        if ($content -like "*$keyword*")
        {
            Write-Warning "$f needs a tag tag"
            $cmdname = $f.name.replace('.ps1', '')
                        
            $fullhelp = get-help $cmdname -full
            
            $as = $fullhelp.alertset | out-string
            
            $tags = $tagsrex.Match($as).Groups[1].Value
            
            if ($tags)
            {
                $tags = $tags.ToString().split(',').Trim()
                Write-Warning "adding tags to existing ones"
                if ($tag -in $tags)
                {
                    Write-Warning "tag $tag is already present"
                    continue
                }
                $out = @()
                foreach ($line in $content)
                {
                    if ($line.trim().startsWith('Tags:'))
                    {
                        $out += "$line, $tag"
                    }
                    else
                    {
                        $out += $line
                    }
                }
                Write-Warning "replacing content into $($f.fullname)"
                $out -join "`r`n" | Set-Content $f.fullname -Encoding UTF8
                
            }
            else
            {
                Write-warning "need to add tags"
                $out = @()
                foreach ($line in $content)
                {
                    if ($line.startsWith('.NOTES'))
                    {
                        $out += '.NOTES'
                        $out += "Tags: $tag"
                    }
                    else
                    {
                        $out += $line
                    }
                }
                Write-Warning "replacing content into $($f.fullname)"
                $out -join "`r`n" | Set-Content $f.fullname -Encoding UTF8
            }
        }
    }
}