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%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
%% ex: ts=4 sw=4 et
%% -------------------------------------------------------------------
%%
%% rebar: Erlang Build Tools
%%
%% Copyright (c) 2010 Dave Smith (dizzyd@dizzyd.com)
%%
%% Permission is hereby granted, free of charge, to any person obtaining a copy
%% of this software and associated documentation files (the "Software"), to deal
%% in the Software without restriction, including without limitation the rights
%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
%% copies of the Software, and to permit persons to whom the Software is
%% furnished to do so, subject to the following conditions:
%%
%% The above copyright notice and this permission notice shall be included in
%% all copies or substantial portions of the Software.
%%
%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
%% THE SOFTWARE.
%% -------------------------------------------------------------------
%% @author Dave Smith <dizzyd@dizzyd.com>
%% @doc rebar_edoc supports the following command:
%% <ul>
%% <li>doc (essentially erl -noshell -run edoc_run application
%% "'$(&lt;app_name&gt;)'"
%% '"."' '[&lt;options&gt;]')</li>
%% </ul>
%% EDoc options can be given in the <code>edoc_opts</code> option in
%% <code>rebar.config</code>.
%% @copyright 2010 Dave Smith
%% -------------------------------------------------------------------
-module(rebar_edoc).
-export([doc/2]).
-include("rebar.hrl").
%% ===================================================================
%% Public API
%% ===================================================================
doc(Config, File) ->
%% Save code path
CodePath = setup_code_path(),
%% Get the edoc_opts and app file info
EDocOpts = rebar_config:get(Config, edoc_opts, []),
{ok, Config1, AppName, _AppData} =
rebar_app_utils:load_app_file(Config, File),
case needs_regen(EDocOpts) of
true ->
?INFO("Regenerating edocs for ~p\n", [AppName]),
ok = edoc:application(AppName, ".", EDocOpts);
false ->
?INFO("Skipping regeneration of edocs for ~p\n", [AppName]),
ok
end,
%% Restore code path
true = code:set_path(CodePath),
{ok, Config1}.
%% ===================================================================
%% Internal functions
%% ===================================================================
setup_code_path() ->
%% Setup code path prior to calling edoc so that edown, asciiedoc,
%% and the like can work properly when generating their own
%% documentation.
CodePath = code:get_path(),
true = code:add_patha(rebar_utils:ebin_dir()),
CodePath.
-type path_spec() :: {'file', file:filename()} | file:filename().
-spec newer_file_exists(Paths::[path_spec()], OldFile::string()) -> boolean().
newer_file_exists(Paths, OldFile) ->
OldModTime = filelib:last_modified(OldFile),
ThrowIfNewer = fun(Fn, _Acc) ->
FModTime = filelib:last_modified(Fn),
(FModTime > OldModTime) andalso
throw({newer_file_exists, {Fn, FModTime}})
end,
try
lists:foldl(fun({file, F}, _) ->
ThrowIfNewer(F, false);
(P, _) ->
filelib:fold_files(P, ".*.erl", true,
ThrowIfNewer, false)
end, undefined, Paths)
catch
throw:{newer_file_exists, {Filename, FMod}} ->
?DEBUG("~p is more recent than ~p: "
"~120p > ~120p\n",
[Filename, OldFile, FMod, OldModTime]),
true
end.
%% Needs regen if any dependent file is changed since the last
%% edoc run. Dependent files are the erlang source files,
%% and the overview file, if it exists.
-spec needs_regen(edoc:proplist()) -> boolean().
needs_regen(EDocOpts) ->
DocDir = proplists:get_value(dir, EDocOpts, "doc"),
EDocInfoName = filename:join(DocDir, "edoc-info"),
OverviewFile = proplists:get_value(overview, EDocOpts, "overview.edoc"),
EDocOverviewName = filename:join(DocDir, OverviewFile),
SrcPaths = proplists:get_value(source_path, EDocOpts, ["src"]),
newer_file_exists([{file, EDocOverviewName} | SrcPaths], EDocInfoName).
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