mirror of
https://github.com/processone/ejabberd.git
synced 2024-12-22 17:28:25 +01:00
464 lines
18 KiB
Erlang
464 lines
18 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : ejabberd_doc.erl
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%%% Purpose : Options documentation generator
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%%%
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%%% ejabberd, Copyright (C) 2002-2021 ProcessOne
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%%%
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%%% This program is free software; you can redistribute it and/or
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%%% modify it under the terms of the GNU General Public License as
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%%% published by the Free Software Foundation; either version 2 of the
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%%% License, or (at your option) any later version.
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%%%
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%%% This program is distributed in the hope that it will be useful,
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%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
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%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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%%% General Public License for more details.
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%%%
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%%% You should have received a copy of the GNU General Public License along
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%%% with this program; if not, write to the Free Software Foundation, Inc.,
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%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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%%%
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%%%----------------------------------------------------------------------
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-module(ejabberd_doc).
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%% API
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-export([man/0, man/1, have_a2x/0]).
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-include("translate.hrl").
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%%%===================================================================
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%%% API
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%%%===================================================================
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man() ->
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man(<<"en">>).
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man(Lang) when is_list(Lang) ->
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man(list_to_binary(Lang));
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man(Lang) ->
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{ModDoc, SubModDoc} =
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lists:foldl(
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fun(M, {Mods, SubMods} = Acc) ->
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case lists:prefix("mod_", atom_to_list(M)) orelse
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lists:prefix("Elixir.Mod", atom_to_list(M)) of
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true ->
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try M:mod_doc() of
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#{desc := Descr} = Map ->
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DocOpts = maps:get(opts, Map, []),
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Example = maps:get(example, Map, []),
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{[{M, Descr, DocOpts, #{example => Example}}|Mods], SubMods};
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#{opts := DocOpts} ->
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{ParentMod, Backend} = strip_backend_suffix(M),
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{Mods, dict:append(ParentMod, {M, Backend, DocOpts}, SubMods)}
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catch _:undef ->
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case erlang:function_exported(
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M, mod_options, 1) of
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true ->
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warn("module ~s is not documented", [M]);
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false ->
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ok
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end,
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Acc
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end;
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false ->
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Acc
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end
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end, {[], dict:new()}, ejabberd_config:beams(all)),
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Doc = lists:flatmap(
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fun(M) ->
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try M:doc()
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catch _:undef -> []
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end
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end, ejabberd_config:callback_modules(all)),
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Options =
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["TOP LEVEL OPTIONS",
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"-----------------",
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tr(Lang, ?T("This section describes top level options of ejabberd.")),
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io_lib:nl()] ++
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lists:flatmap(
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fun(Opt) ->
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opt_to_man(Lang, Opt, 1)
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end, lists:keysort(1, Doc)),
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ModDoc1 = lists:map(
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fun({M, Descr, DocOpts, Ex}) ->
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case dict:find(M, SubModDoc) of
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{ok, Backends} ->
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{M, Descr, DocOpts, Backends, Ex};
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error ->
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{M, Descr, DocOpts, [], Ex}
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end
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end, ModDoc),
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ModOptions =
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[io_lib:nl(),
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"MODULES",
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"-------",
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"[[modules]]",
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tr(Lang, ?T("This section describes options of all ejabberd modules.")),
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io_lib:nl()] ++
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lists:flatmap(
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fun({M, Descr, DocOpts, Backends, Example}) ->
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ModName = atom_to_list(M),
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[io_lib:nl(),
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ModName,
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lists:duplicate(length(atom_to_list(M)), $~),
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"[[" ++ ModName ++ "]]",
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io_lib:nl()] ++
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tr_multi(Lang, Descr) ++ [io_lib:nl()] ++
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opts_to_man(Lang, [{M, '', DocOpts}|Backends]) ++
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format_example(0, Lang, Example)
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end, lists:keysort(1, ModDoc1)),
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ListenOptions =
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[io_lib:nl(),
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"LISTENERS",
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"-------",
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"[[listeners]]",
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tr(Lang, ?T("This section describes options of all ejabberd listeners.")),
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io_lib:nl(),
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"TODO"],
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AsciiData =
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[[unicode:characters_to_binary(Line), io_lib:nl()]
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|| Line <- man_header(Lang) ++ Options ++ [io_lib:nl()]
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++ ModOptions ++ ListenOptions ++ man_footer(Lang)],
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warn_undocumented_modules(ModDoc1),
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warn_undocumented_options(Doc),
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write_man(AsciiData).
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%%%===================================================================
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%%% Internal functions
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%%%===================================================================
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opts_to_man(Lang, [{_, _, []}]) ->
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Text = tr(Lang, ?T("The module has no options.")),
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[Text, io_lib:nl()];
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opts_to_man(Lang, Backends) ->
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lists:flatmap(
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fun({_, Backend, DocOpts}) when DocOpts /= [] ->
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Text = if Backend == '' ->
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tr(Lang, ?T("Available options"));
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true ->
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lists:flatten(
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io_lib:format(
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tr(Lang, ?T("Available options for '~s' backend")),
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[Backend]))
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end,
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[Text ++ ":", lists:duplicate(length(Text)+1, $^)|
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lists:flatmap(
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fun(Opt) -> opt_to_man(Lang, Opt, 1) end,
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lists:keysort(1, DocOpts))] ++ [io_lib:nl()];
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(_) ->
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[]
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end, Backends).
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opt_to_man(Lang, {Option, Options}, Level) ->
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[format_option(Lang, Option, Options)|format_desc(Lang, Options)] ++
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format_example(Level, Lang, Options);
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opt_to_man(Lang, {Option, Options, Children}, Level) ->
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[format_option(Lang, Option, Options)|format_desc(Lang, Options)] ++
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lists:append(
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[[H ++ ":"|T]
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|| [H|T] <- lists:map(
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fun(Opt) -> opt_to_man(Lang, Opt, Level+1) end,
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lists:keysort(1, Children))]) ++
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[io_lib:nl()|format_example(Level, Lang, Options)].
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format_option(Lang, Option, #{note := Note, value := Val}) ->
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"\n\n_Note_ about the next option: " ++ Note ++ ":\n\n"++
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"*" ++ atom_to_list(Option) ++ "*: 'pass:[" ++
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tr(Lang, Val) ++ "]'::";
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format_option(Lang, Option, #{value := Val}) ->
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"*" ++ atom_to_list(Option) ++ "*: 'pass:[" ++
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tr(Lang, Val) ++ "]'::";
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format_option(_Lang, Option, #{}) ->
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"*" ++ atom_to_list(Option) ++ "*::".
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format_desc(Lang, #{desc := Desc}) ->
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tr_multi(Lang, Desc).
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format_example(Level, Lang, #{example := [_|_] = Example}) ->
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case lists:all(fun is_list/1, Example) of
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true ->
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if Level == 0 ->
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["*Example*:",
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"^^^^^^^^^^"];
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true ->
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["+", "*Example*:", "+"]
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end ++ format_yaml(Example);
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false when Level == 0 ->
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["Examples:",
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"^^^^^^^^^"] ++
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lists:flatmap(
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fun({Text, Lines}) ->
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[tr(Lang, Text)] ++ format_yaml(Lines)
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end, Example);
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false ->
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lists:flatmap(
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fun(Block) ->
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["+", "''''", "+"|Block]
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end,
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lists:map(
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fun({Text, Lines}) ->
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[tr(Lang, Text), "+"] ++ format_yaml(Lines)
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end, Example))
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end;
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format_example(_, _, _) ->
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[].
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format_yaml(Lines) ->
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["==========================",
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"[source,yaml]",
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"----"|Lines] ++
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["----",
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"=========================="].
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man_header(Lang) ->
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["ejabberd.yml(5)",
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"===============",
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":doctype: manpage",
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":version: " ++ binary_to_list(ejabberd_config:version()),
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io_lib:nl(),
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"NAME",
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"----",
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"ejabberd.yml - " ++ tr(Lang, ?T("main configuration file for ejabberd.")),
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io_lib:nl(),
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"SYNOPSIS",
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"--------",
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"ejabberd.yml",
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io_lib:nl(),
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"DESCRIPTION",
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"-----------",
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tr(Lang, ?T("The configuration file is written in "
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"https://en.wikipedia.org/wiki/YAML[YAML] language.")),
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io_lib:nl(),
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tr(Lang, ?T("WARNING: YAML is indentation sensitive, so make sure you respect "
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"indentation, or otherwise you will get pretty cryptic "
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"configuration errors.")),
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io_lib:nl(),
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tr(Lang, ?T("Logically, configuration options are splitted into 3 main categories: "
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"'Modules', 'Listeners' and everything else called 'Top Level' options. "
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"Thus this document is splitted into 3 main chapters describing each "
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"category separately. So, the contents of ejabberd.yml will typically "
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"look like this:")),
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io_lib:nl(),
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"==========================",
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"[source,yaml]",
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"----",
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"hosts:",
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" - example.com",
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" - domain.tld",
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"loglevel: info",
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"...",
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"listen:",
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" -",
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" port: 5222",
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" module: ejabberd_c2s",
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" ...",
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"modules:",
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" mod_roster: {}",
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" ...",
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"----",
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"==========================",
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io_lib:nl(),
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tr(Lang, ?T("Any configuration error (such as syntax error, unknown option "
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"or invalid option value) is fatal in the sense that ejabberd will "
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"refuse to load the whole configuration file and will not start or will "
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"abort configuration reload.")),
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io_lib:nl(),
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tr(Lang, ?T("All options can be changed in runtime by running 'ejabberdctl "
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"reload-config' command. Configuration reload is atomic: either all options "
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"are accepted and applied simultaneously or the new configuration is "
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"refused without any impact on currently running configuration.")),
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io_lib:nl(),
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tr(Lang, ?T("Some options can be specified for particular virtual host(s) only "
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"using 'host_config' or 'append_host_config' options. Such options "
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"are called 'local'. Examples are 'modules', 'auth_method' and 'default_db'. "
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"The options that cannot be defined per virtual host are called 'global'. "
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"Examples are 'loglevel', 'certfiles' and 'listen'. It is a configuration "
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"mistake to put 'global' options under 'host_config' or 'append_host_config' "
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"section - ejabberd will refuse to load such configuration.")),
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io_lib:nl(),
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str:format(
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tr(Lang, ?T("It is not recommended to write ejabberd.yml from scratch. Instead it is "
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"better to start from \"default\" configuration file available at ~s. "
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"Once you get ejabberd running you can start changing configuration "
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"options to meet your requirements.")),
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[default_config_url()]),
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io_lib:nl(),
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str:format(
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tr(Lang, ?T("Note that this document is intended to provide comprehensive description of "
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"all configuration options that can be consulted to understand the meaning "
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"of a particular option, its format and possible values. It will be quite "
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"hard to understand how to configure ejabberd by reading this document only "
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"- for this purpose the reader is recommended to read online Configuration "
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"Guide available at ~s.")),
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[configuration_guide_url()]),
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io_lib:nl()].
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man_footer(Lang) ->
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{Year, _, _} = date(),
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[io_lib:nl(),
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"AUTHOR",
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"------",
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"https://www.process-one.net[ProcessOne].",
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io_lib:nl(),
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"VERSION",
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"-------",
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str:format(
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tr(Lang, ?T("This document describes the configuration file of ejabberd ~ts. "
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"Configuration options of other ejabberd versions "
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"may differ significantly.")),
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[ejabberd_config:version()]),
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io_lib:nl(),
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"REPORTING BUGS",
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"--------------",
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tr(Lang, ?T("Report bugs to <https://github.com/processone/ejabberd/issues>")),
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io_lib:nl(),
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"SEE ALSO",
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"---------",
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tr(Lang, ?T("Default configuration file")) ++ ": " ++ default_config_url(),
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io_lib:nl(),
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tr(Lang, ?T("Main site")) ++ ": <https://ejabberd.im>",
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io_lib:nl(),
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tr(Lang, ?T("Documentation")) ++ ": <https://docs.ejabberd.im>",
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io_lib:nl(),
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tr(Lang, ?T("Configuration Guide")) ++ ": " ++ configuration_guide_url(),
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io_lib:nl(),
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tr(Lang, ?T("Source code")) ++ ": <https://github.com/processone/ejabberd>",
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io_lib:nl(),
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"COPYING",
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"-------",
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"Copyright (c) 2002-" ++ integer_to_list(Year) ++
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" https://www.process-one.net[ProcessOne]."].
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tr(Lang, {Format, Args}) ->
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unicode:characters_to_list(
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str:format(
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translate:translate(Lang, iolist_to_binary(Format)),
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Args));
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tr(Lang, Txt) ->
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unicode:characters_to_list(translate:translate(Lang, iolist_to_binary(Txt))).
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tr_multi(Lang, Txt) when is_binary(Txt) ->
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tr_multi(Lang, [Txt]);
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tr_multi(Lang, {Format, Args}) ->
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tr_multi(Lang, [{Format, Args}]);
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tr_multi(Lang, Lines) when is_list(Lines) ->
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[tr(Lang, Txt) || Txt <- Lines].
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write_man(AsciiData) ->
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case file:get_cwd() of
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{ok, Cwd} ->
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AsciiDocFile = filename:join(Cwd, "ejabberd.yml.5.txt"),
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ManPage = filename:join(Cwd, "ejabberd.yml.5"),
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case file:write_file(AsciiDocFile, AsciiData) of
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ok ->
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Ret = run_a2x(Cwd, AsciiDocFile),
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%%file:delete(AsciiDocFile),
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case Ret of
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ok ->
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{ok, lists:flatten(
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io_lib:format(
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"The manpage saved as ~ts", [ManPage]))};
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{error, Error} ->
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{error, lists:flatten(
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io_lib:format(
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"Failed to generate manpage: ~ts", [Error]))}
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end;
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{error, Reason} ->
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{error, lists:flatten(
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io_lib:format(
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"Failed to write to ~ts: ~s",
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[AsciiDocFile, file:format_error(Reason)]))}
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end;
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{error, Reason} ->
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{error, lists:flatten(
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io_lib:format("Failed to get current directory: ~s",
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[file:format_error(Reason)]))}
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end.
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have_a2x() ->
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case os:find_executable("a2x") of
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false -> false;
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Path -> {true, Path}
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end.
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run_a2x(Cwd, AsciiDocFile) ->
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case have_a2x() of
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false ->
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{error, "a2x was not found: do you have 'asciidoc' installed?"};
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{true, Path} ->
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Cmd = lists:flatten(
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io_lib:format("~ts -f manpage ~ts -D ~ts",
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[Path, AsciiDocFile, Cwd])),
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case os:cmd(Cmd) of
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"" -> ok;
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Ret -> {error, Ret}
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end
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end.
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warn_undocumented_modules(Docs) ->
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lists:foreach(
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fun({M, _, DocOpts, Backends, _}) ->
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warn_undocumented_module(M, DocOpts),
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lists:foreach(
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fun({SubM, _, SubOpts}) ->
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warn_undocumented_module(SubM, SubOpts)
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end, Backends)
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end, Docs).
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warn_undocumented_module(M, DocOpts) ->
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try M:mod_options(ejabberd_config:get_myname()) of
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Defaults ->
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lists:foreach(
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fun(OptDefault) ->
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Opt = case OptDefault of
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O when is_atom(O) -> O;
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{O, _} -> O
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end,
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case lists:keymember(Opt, 1, DocOpts) of
|
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false ->
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warn("~s: option ~s is not documented",
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[M, Opt]);
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true ->
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ok
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end
|
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end, Defaults)
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catch _:undef ->
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ok
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end.
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|
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warn_undocumented_options(Docs) ->
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Opts = lists:flatmap(
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fun(M) ->
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try M:options() of
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Defaults ->
|
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lists:map(
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fun({O, _}) -> O;
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(O) when is_atom(O) -> O
|
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end, Defaults)
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catch _:undef ->
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[]
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end
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end, ejabberd_config:callback_modules(all)),
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lists:foreach(
|
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fun(Opt) ->
|
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case lists:keymember(Opt, 1, Docs) of
|
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false ->
|
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warn("option ~s is not documented", [Opt]);
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true ->
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ok
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end
|
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end, Opts).
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|
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warn(Format, Args) ->
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io:format(standard_error, "Warning: " ++ Format ++ "~n", Args).
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strip_backend_suffix(M) ->
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[H|T] = lists:reverse(string:tokens(atom_to_list(M), "_")),
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{list_to_atom(string:join(lists:reverse(T), "_")), list_to_atom(H)}.
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default_config_url() ->
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"<https://github.com/processone/ejabberd/blob/" ++
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binary_to_list(binary:part(ejabberd_config:version(), {0,5})) ++
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"/ejabberd.yml.example>".
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configuration_guide_url() ->
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"<https://docs.ejabberd.im/admin/configuration>".
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