PSCompletions

4.3.2

core/completion/unix.ps1

                                Add-Member -InputObject $PSCompletions -MemberType ScriptMethod generate_completion {}

Add-Member -InputObject $PSCompletions -MemberType ScriptMethod handle_completion {

    foreach ($_ in $this.alias.keys) {

        Register-ArgumentCompleter -CommandName $_ -ScriptBlock {

            param($word_to_complete, $command_ast, $cursor_position)

            $space_tab = if (!$word_to_complete.length) { 1 }else { 0 }

            $input_arr = @()

            $matches = [regex]::Matches($command_ast.CommandElements, "(?:`"[^`"]*`"|'[^']*'|\S)+")

            foreach ($match in $matches) { $input_arr += $match.Value }

            $alias = $input_arr[0]

            $PSCompletions.current_cmd = $root = $PSCompletions.alias.$alias

            $input_arr = if ($input_arr.Count -le 1) { , @() } else { $input_arr[1..($input_arr.Count - 1)] }

            $filter_list = $PSCompletions.get_completion()

            $PSCompletions.menu.show_powershell_menu($filter_list)

            $PSCompletions.current_cmd = $null

        }

    }

}