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## The contents of this file are subject to the Mozilla Public License
## Version 1.1 (the "License"); you may not use this file except in
## compliance with the License. You may obtain a copy of the License
## at http://www.mozilla.org/MPL/
##
## Software distributed under the License is distributed on an "AS IS"
## basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
## the License for the specific language governing rights and
## limitations under the License.
##
## The Original Code is RabbitMQ.
##
## The Initial Developer of the Original Code is GoPivotal, Inc.
## Copyright (c) 2007-2017 Pivotal Software, Inc. All rights reserved.
defmodule Rabbitmq.CLI.AutoComplete do
alias RabbitMQ.CLI.Core.Parser, as: Parser
alias RabbitMQ.CLI.Core.CommandModules, as: CommandModules
@spec complete(String.t, [String.t]) :: [String.t]
def complete(_, []) do
[]
end
def complete(script_name, args) do
case Parser.parse_global(args) do
{_, %{script_name: _args_script_name}, _} ->
complete(args);
_ ->
complete(["--script-name", script_name | args])
end
end
defp complete(tokens) do
{command, command_name, _, _, _} = Parser.parse(tokens)
last_token = List.last(tokens)
case {command, command_name} do
## No command provided
{_, ""} -> complete_default_opts(last_token);
## Command is not found/incomplete
{:no_command, command_name} ->
complete_command_name(command_name);
{{:suggest, _}, command_name} ->
complete_command_name(command_name);
## Command is found
{command, _} ->
complete_command_opts(command, last_token)
end
|> Enum.sort
end
defp complete_default_opts(opt) do
Parser.default_switches
|> Keyword.keys
|> Enum.map(fn(sw) -> "--" <> to_string(sw) end)
|> select_starts_with(opt)
|> format_options
end
defp complete_command_name(command_name) do
module_map = CommandModules.module_map
case module_map[command_name] do
nil ->
module_map
|> Map.keys
|> select_starts_with(command_name)
_ ->
command_name
end
end
defp complete_command_opts(command, <<"-", _ :: binary>> = opt) do
switches = command.switches
|> Keyword.keys
|> Enum.map(fn(sw) -> "--" <> to_string(sw) end)
# aliases = command.aliases
# |> Keyword.keys
# |> Enum.map(fn(al) -> "-" <> to_string(al) end)
select_starts_with(switches, opt)
|> format_options
end
defp complete_command_opts(_, _) do
[]
end
defp select_starts_with(list, prefix) do
Enum.filter(list, fn(el) -> String.starts_with?(el, prefix) end)
end
defp format_options(options) do
options
|> Enum.map(fn(opt) -> String.replace(opt, "_", "-") end)
end
end
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