Shell quote/unquote command Line Powershell

shellquote.ps1

function BuildCommandLine([string[]] $ArgumentList) {
  $special_chars = '[\x00-\x20"^%~!@&?*<>|()\\=]'
  $quoted_args = $ArgumentList | foreach {
    if ($_ -match $special_chars) {
      # Double all double-quote characters.
      $_ = $_ -replace '"', '""' 
      # Wrap in double-quote characters.
      $_ = """$_"""           
      # Double all backslashes that are followed by \.
      $_ = $_ -replace '[\\]+(?=")', '$0$0' 
    }
    $_
  } 
  $quoted_args -join " "
}

# PowerShell equivalent of CommandLineToArgvW.
# https://docs.microsoft.com/en-us/windows/desktop/api/shellapi/nf-shellapi-commandlinetoargvw
function ParseCommandLine([string] $CommandLine) {
  $CommandLine | foreach {
    $arg = $null      # Argument currently being built by the parser.
    $q = $false       # True when parsing a quoted substring (between ").
    for (; $_ -or $arg -ne $null; $_ = $_.Remove(0, $Matches[0].Length)) {
      if ($_ -match '^(\\\\)+(?=\\?")') {     # Backslashes are escaped
        $arg += '\' * ($Matches[0].Length/2)  # as \\, but only before ".
      } elseif ($_ -match '^\\"' -or ($q -and $_ -match '^""')) {
        $arg += '"'   # Quotes are escaped as \", in quoted str also "".
      } elseif ($_ -match '^"') {
        $q = -not $q  # Unescaped quote: begin/end of quoted substring.
        $arg += ''    # Empty args happen; if $arg is null, change to ''.
      } elseif ($_ -match '^$' -or (-not $q -and $_ -match '^[ `t]+')) {
        $arg          # End of cmd, or space/tab outside quotes: emit arg.
        $arg = $null  # Init next arg. Note: null $arg += 'string' is ok.
      } elseif ($_ -match '^.') {
        $arg += $Matches[0]  # Char w/o special purpose: append to arg.
      }
    }
  }
}