%% =====================================================================
%% This library is free software; you can redistribute it and/or modify
%% it under the terms of the GNU Lesser General Public License as
%% published by the Free Software Foundation; either version 2 of the
%% License, or (at your option) any later version.
%%
%% This library is distributed in the hope that it will be useful, but
%% WITHOUT ANY WARRANTY; without even the implied warranty of
%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
%% Lesser General Public License for more details.
%%
%% You should have received a copy of the GNU Lesser General Public
%% License along with this library; if not, write to the Free Software
%% Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
%% USA
%%
%% @copyright 2001-2007 Richard Carlsson
%% @author Richard Carlsson <[email protected]>
%% @version {@version}
%% @end
%% =====================================================================
%% TODO: check weirdness in name generation for @spec f(TypeName, ...) -> ...
%% TODO: option for ignoring functions matching some pattern ('..._test_'/0)
%% TODO: @private_type tag, opaque unless generating private docs?
%% TODO: document the record type syntax
%% TODO: some 'skip' option for ignoring particular modules?
%% TODO: multiline comment support (needs modified comment representation)
%% TODO: config-file for default settings
%% TODO: config: locations of all local docdirs; generate local doc-index page
%% TODO: config: URL:s of offline apps
%% TODO: config: default stylesheet
%% TODO: config: default header/footer, etc.
%% TODO: offline linkage
%% TODO: including source code, explicitly and/or automatically
%% @doc EDoc - the Erlang program documentation generator.
%%
%% This module provides the main user interface to EDoc.
%% <ul>
%% <li><a href="overview-summary.html">EDoc User Manual</a></li>
%% <li><a href="overview-summary.html#Running_EDoc">Running EDoc</a></li>
%% </ul>
-module(edoc).
-export([files/1, files/2,
application/1, application/2, application/3,
toc/1, toc/2, toc/3,
run/2,
file/1, file/2,
read/1, read/2,
layout/1, layout/2,
get_doc/1, get_doc/2, get_doc/3,
read_comments/1, read_comments/2,
read_source/1, read_source/2]).
-compile({no_auto_import,[error/1]}).
-include("edoc.hrl").
%% @spec (Name::filename()) -> ok
%% @equiv file(Name, [])
%% @deprecated See {@link file/2} for details.
file(Name) ->
file(Name, []).
%% @spec file(filename(), proplist()) -> ok
%%
%% @type filename() = //kernel/file:filename()
%% @type proplist() = [term()]
%%
%% @deprecated This is part of the old interface to EDoc and is mainly
%% kept for backwards compatibility. The preferred way of generating
%% documentation is through one of the functions {@link application/2}
%% and {@link files/2}.
%%
%% @doc Reads a source code file and outputs formatted documentation to
%% a corresponding file.
%%
%% Options:
%% <dl>
%% <dt>{@type {dir, filename()@}}
%% </dt>
%% <dd>Specifies the output directory for the created file. (By
%% default, the output is written to the directory of the source
%% file.)
%% </dd>
%% <dt>{@type {source_suffix, string()@}}
%% </dt>
%% <dd>Specifies the expected suffix of the input file. The default
%% value is `".erl"'.
%% </dd>
%% <dt>{@type {file_suffix, string()@}}
%% </dt>
%% <dd>Specifies the suffix for the created file. The default value is
%% `".html"'.
%% </dd>
%% </dl>
%%
%% See {@link get_doc/2} and {@link layout/2} for further
%% options.
%%
%% For running EDoc from a Makefile or similar, see
%% {@link edoc_run:file/1}.
%%
%% @see read/2
%% NEW-OPTIONS: source_suffix, file_suffix, dir
%% INHERIT-OPTIONS: read/2
file(Name, Options) ->
Text = read(Name, Options),
SrcSuffix = proplists:get_value(source_suffix, Options,
?DEFAULT_SOURCE_SUFFIX),
BaseName = filename:basename(Name, SrcSuffix),
Suffix = proplists:get_value(file_suffix, Options,
?DEFAULT_FILE_SUFFIX),
Dir = proplists:get_value(dir, Options, filename:dirname(Name)),
Encoding = [{encoding, edoc_lib:read_encoding(Name, [])}],
edoc_lib:write_file(Text, Dir, BaseName ++ Suffix, Encoding).
%% TODO: better documentation of files/1/2, application/1/2/3
%% @spec (Files::[filename()]) -> ok
files(Files) ->
files(Files, []).
%% @spec (Files::[filename()],
%% Options::proplist()) -> ok
%% @doc Runs EDoc on a given set of source files. See {@link run/2} for
%% details, including options.
%% @equiv run([], Files, Options)
files(Files, Options) ->
run(Files, Options).
%% @spec (Application::atom()) -> ok
%% @equiv application(Application, [])
application(App) ->
application(App, []).
%% @spec (Application::atom(), Options::proplist()) -> ok
%% @doc Run EDoc on an application in its default app-directory. See
%% {@link application/3} for details.
%% @see application/1
application(App, Options) when is_atom(App) ->
case code:lib_dir(App) of
Dir when is_list(Dir) ->
application(App, Dir, Options);
_ ->
edoc_report:report("cannot find application directory for '~s'.",
[App]),
exit(error)
end.
%% @spec (Application::atom(), Dir::filename(), Options::proplist())
%% -> ok
%% @doc Run EDoc on an application located in the specified directory.
%% Tries to automatically set up good defaults. Unless the user
%% specifies otherwise:
%% <ul>
%% <li>The `doc' subdirectory will be used as the target directory, if
%% it exists; otherwise the application directory is used.
%% </li>
%% <li>The source code is assumed to be located in the `src'
%% subdirectory, if it exists, or otherwise in the application
%% directory itself.
%% </li>
%% <li>The {@link run/2. `subpackages'} option is turned on. All found
%% source files will be processed.
%% </li>
%% <li>The `include' subdirectory is automatically added to the
%% include path. (Only important if {@link read_source/2.
%% preprocessing} is turned on.)
%% </li>
%% </ul>
%%
%% See {@link run/2} for details, including options.
%%
%% @see application/2
application(App, Dir, Options) when is_atom(App) ->
Src = edoc_lib:try_subdir(Dir, ?SOURCE_DIR),
Overview = filename:join(edoc_lib:try_subdir(Dir, ?EDOC_DIR),
?OVERVIEW_FILE),
Opts = Options ++ [{source_path, [Src]},
subpackages,
{title, io_lib:fwrite("The ~s application", [App])},
{overview, Overview},
{dir, filename:join(Dir, ?EDOC_DIR)},
{includes, [filename:join(Dir, "include")]}],
Opts1 = set_app_default(App, Dir, Opts),
%% Recursively document all subpackages of '' - i.e., everything.
run([], [{application, App} | Opts1]).
%% Try to set up a default application base URI in a smart way if the
%% user has not specified it explicitly.
set_app_default(App, Dir0, Opts) ->
case proplists:get_value(app_default, Opts) of
undefined ->
AppName = atom_to_list(App),
Dir = edoc_lib:simplify_path(filename:absname(Dir0)),
AppDir = case filename:basename(Dir) of
AppName ->
filename:dirname(Dir);
_ ->
?APP_DEFAULT
end,
[{app_default, AppDir} | Opts];
_ ->
Opts
end.
opt_defaults() ->
[].
opt_negations() ->
[{no_preprocess, preprocess},
{no_subpackages, subpackages},
{no_report_missing_types, report_missing_types}].
%% @spec run(Files::[filename()],
%% Options::proplist()) -> ok
%% @doc Runs EDoc on a given set of source files. Note
%% that the doclet plugin module has its own particular options; see the
%% `doclet' option below.
%%
%% Also see {@link layout/2} for layout-related options, and
%% {@link get_doc/2} for options related to reading source
%% files.
%%
%% Options:
%% <dl>
%% <dt>{@type {app_default, string()@}}
%% </dt>
%% <dd>Specifies the default base URI for unknown applications.
%% </dd>
%% <dt>{@type {application, App::atom()@}}
%% </dt>
%% <dd>Specifies that the generated documentation describes the
%% application `App'. This mainly affects generated references.
%% </dd>
%% <dt>{@type {dir, filename()@}}
%% </dt>
%% <dd>Specifies the target directory for the generated documentation.
%% </dd>
%% <dt>{@type {doc_path, [string()]@}}
%% </dt>
%% <dd>Specifies a list of URI:s pointing to directories that contain
%% EDoc-generated documentation. URI without a `scheme://' part are
%% taken as relative to `file://'. (Note that such paths must use
%% `/' as separator, regardless of the host operating system.)
%% </dd>
%% <dt>{@type {doclet, Module::atom()@}}
%% </dt>
%% <dd>Specifies a callback module to be used for creating the
%% documentation. The module must export a function `run(Cmd, Ctxt)'.
%% The default doclet module is {@link edoc_doclet}; see {@link
%% edoc_doclet:run/2} for doclet-specific options.
%% </dd>
%% <dt>{@type {file_suffix, string()@}}
%% </dt>
%% <dd>Specifies the suffix used for output files. The default value is
%% `".html"'. Note that this also affects generated references.
%% </dd>
%% <dt>{@type {new, boolean()@}}
%% </dt>
%% <dd>If the value is `true', any existing `edoc-info' file in the
%% target directory will be ignored and overwritten. The default
%% value is `false'.
%% </dd>
%% <dt>{@type {source_path, [filename()]@}}
%% </dt>
%% <dd>Specifies a list of file system paths used to locate the source
%% code for packages.
%% </dd>
%% <dt>{@type {source_suffix, string()@}}
%% </dt>
%% <dd>Specifies the expected suffix of input files. The default
%% value is `".erl"'.
%% </dd>
%% <dt>{@type {subpackages, boolean()@}}
%% </dt>
%% <dd>If the value is `true', all subpackages of specified packages
%% will also be included in the documentation. The default value is
%% `false'. `no_subpackages' is an alias for `{subpackages,
%% false}'.
%%
%% Subpackage source files are found by recursively searching
%% for source code files in subdirectories of the known source code
%% root directories. (Also see the `source_path' option.) Directory
%% names must begin with a lowercase letter and contain only
%% alphanumeric characters and underscore, or they will be ignored.
%% (For example, a subdirectory named `test-files' will not be
%% searched.)
%% </dd>
%% </dl>
%%
%% @see files/2
%% @see application/2
%% NEW-OPTIONS: source_path, application
%% INHERIT-OPTIONS: init_context/1
%% INHERIT-OPTIONS: expand_sources/2
%% INHERIT-OPTIONS: target_dir_info/5
%% INHERIT-OPTIONS: edoc_lib:find_sources/2
%% INHERIT-OPTIONS: edoc_lib:run_doclet/2
%% INHERIT-OPTIONS: edoc_lib:get_doc_env/3
run(Files, Opts0) ->
Opts = expand_opts(Opts0),
Ctxt = init_context(Opts),
Dir = Ctxt#context.dir,
Path = proplists:append_values(source_path, Opts),
Ss = sources(Path, Opts),
{Ss1, Ms} = expand_sources(expand_files(Files) ++ Ss, Opts),
App = proplists:get_value(application, Opts, ?NO_APP),
{App1, Ms1} = target_dir_info(Dir, App, Ms, Opts),
Ms2 = edoc_lib:unique(lists:sort(Ms1)),
Env = edoc_lib:get_doc_env(App1, Ms2, Opts),
Ctxt1 = Ctxt#context{env = Env},
Cmd = #doclet_gen{sources = Ss1,
app = App1,
modules = Ms2
},
F = fun (M) ->
M:run(Cmd, Ctxt1)
end,
edoc_lib:run_doclet(F, Opts).
expand_opts(Opts0) ->
proplists:substitute_negations(opt_negations(),
Opts0 ++ opt_defaults()).
%% NEW-OPTIONS: dir
%% DEFER-OPTIONS: run/2
init_context(Opts) ->
#context{dir = proplists:get_value(dir, Opts, ?CURRENT_DIR),
opts = Opts
}.
%% INHERIT-OPTIONS: edoc_lib:find_sources/2
sources(Path, Opts) ->
edoc_lib:find_sources(Path, Opts).
%% Expand user-specified sets of files.
expand_files([F | Fs]) ->
[{filename:basename(F), filename:dirname(F)} |
expand_files(Fs)];
expand_files([]) ->
[].
%% Create the (assumed) full module names. Keep only the first source
%% for each module, but preserve the order of the list.
%% NEW-OPTIONS: source_suffix
%% DEFER-OPTIONS: run/2
expand_sources(Ss, Opts) ->
Suffix = proplists:get_value(source_suffix, Opts,
?DEFAULT_SOURCE_SUFFIX),
Ss1 = [{F,D} || {F,D} <- Ss],
expand_sources(Ss1, Suffix, sets:new(), [], []).
expand_sources([{F, D} | Fs], Suffix, S, As, Ms) ->
M = list_to_atom(filename:rootname(F, Suffix)),
case sets:is_element(M, S) of
true ->
expand_sources(Fs, Suffix, S, As, Ms);
false ->
S1 = sets:add_element(M, S),
expand_sources(Fs, Suffix, S1, [{M, F, D} | As],
[M | Ms])
end;
expand_sources([], _Suffix, _S, As, Ms) ->
{lists:reverse(As), lists:reverse(Ms)}.
%% NEW-OPTIONS: new
target_dir_info(Dir, App, Ms, Opts) ->
case proplists:get_bool(new, Opts) of
true ->
{App, Ms};
false ->
{App1, Ms1} = edoc_lib:read_info_file(Dir),
{if App == ?NO_APP -> App1;
true -> App
end,
Ms ++ Ms1}
end.
%% @hidden Not official yet
toc(Dir) ->
toc(Dir, []).
%% @equiv toc(Dir, Paths, [])
%% @hidden Not official yet
%% NEW-OPTIONS: doc_path
toc(Dir, Opts) ->
Paths = proplists:append_values(doc_path, Opts)
++ edoc_lib:find_doc_dirs(),
toc(Dir, Paths, Opts).
%% @doc Create a meta-level table of contents.
%% @hidden Not official yet
%% INHERIT-OPTIONS: init_context/1
%% INHERIT-OPTIONS: edoc_lib:run_doclet/2
%% INHERIT-OPTIONS: edoc_lib:get_doc_env/3
toc(Dir, Paths, Opts0) ->
Opts = expand_opts(Opts0 ++ [{dir, Dir}]),
Ctxt = init_context(Opts),
Env = edoc_lib:get_doc_env('', [], Opts),
Ctxt1 = Ctxt#context{env = Env},
F = fun (M) ->
M:run(#doclet_toc{paths=Paths}, Ctxt1)
end,
edoc_lib:run_doclet(F, Opts).
%% @spec read(File::filename()) -> string()
%% @equiv read(File, [])
read(File) ->
read(File, []).
%% @spec read(File::filename(), Options::proplist()) -> string()
%%
%% @doc Reads and processes a source file and returns the resulting
%% EDoc-text as a string. See {@link get_doc/2} and {@link layout/2} for
%% options.
%%
%% @see file/2
%% INHERIT-OPTIONS: get_doc/2, layout/2
read(File, Opts) ->
{_ModuleName, Doc} = get_doc(File, Opts),
layout(Doc, Opts).
%% @spec layout(Doc::edoc_module()) -> string()
%% @equiv layout(Doc, [])
layout(Doc) ->
layout(Doc, []).
%% @spec layout(Doc::edoc_module(), Options::proplist()) -> string()
%%
%% @doc Transforms EDoc module documentation data to text. The default
%% layout creates an HTML document.
%%
%% Options:
%% <dl>
%% <dt>{@type {layout, Module::atom()@}}
%% </dt>
%% <dd>Specifies a callback module to be used for formatting. The
%% module must export a function `module(Doc, Options)'. The
%% default callback module is {@link edoc_layout}; see {@link
%% edoc_layout:module/2} for layout-specific options.
%% </dd>
%% </dl>
%%
%% @see layout/1
%% @see run/2
%% @see read/2
%% @see file/2
%% INHERIT-OPTIONS: edoc_lib:run_layout/2
layout(Doc, Opts) ->
F = fun (M) ->
M:module(Doc, Opts)
end,
edoc_lib:run_layout(F, Opts).
%% @spec (File) -> [comment()]
%% @type comment() = {Line, Column, Indentation, Text}
%% where
%% Line = integer(),
%% Column = integer(),
%% Indentation = integer(),
%% Text = [string()]
%% @equiv read_comments(File, [])
read_comments(File) ->
read_comments(File, []).
%% @spec read_comments(File::filename(), Options::proplist()) ->
%% [comment()]
%%
%% @doc Extracts comments from an Erlang source code file. See the
%% module {@link //syntax_tools/erl_comment_scan} for details on the
%% representation of comments. Currently, no options are avaliable.
read_comments(File, _Opts) ->
erl_comment_scan:file(File).
%% @spec (File) -> [syntaxTree()]
%% @equiv read_source(File, [])
read_source(Name) ->
read_source(Name, []).
%% @spec read_source(File::filename(), Options::proplist()) ->
%% [syntaxTree()]
%%
%% @type syntaxTree() = //syntax_tools/erl_syntax:syntaxTree()
%%
%% @doc Reads an Erlang source file and returns the list of "source code
%% form" syntax trees.
%%
%% Options:
%% <dl>
%% <dt>{@type {preprocess, boolean()@}}
%% </dt>
%% <dd>If the value is `true', the source file will be read via the
%% Erlang preprocessor (`epp'). The default value is `false'.
%% `no_preprocess' is an alias for `{preprocess, false}'.
%%
%% Normally, preprocessing is not necessary for EDoc to work, but
%% if a file contains too exotic definitions or uses of macros, it
%% will not be possible to read it without preprocessing. <em>Note:
%% comments in included files will not be available to EDoc, even
%% with this option enabled.</em>
%% </dd>
%% <dt>{@type {includes, Path::[string()]@}}
%% </dt>
%% <dd>Specifies a list of directory names to be searched for include
%% files, if the `preprocess' option is turned on. Also used with
%% the `@headerfile' tag. The default value is the empty list. The
%% directory of the source file is always automatically appended to
%% the search path.
%% </dd>
%% <dt>{@type {macros, [{atom(), term()@}]@}}
%% </dt>
%% <dd>Specifies a list of pre-defined Erlang preprocessor (`epp')
%% macro definitions, used if the `preprocess' option is turned on.
%% The default value is the empty list.</dd>
%% <dt>{@type {report_missing_types, boolean()@}}
%% </dt>
%% <dd>If the value is `true', warnings are issued for missing types.
%% The default value is `false'.
%% `no_report_missing_types' is an alias for
%% `{report_missing_types, false}'.
%% </dd>
%% </dl>
%%
%% @see get_doc/2
%% @see //syntax_tools/erl_syntax
%% NEW-OPTIONS: [no_]preprocess (preprocess -> includes, macros)
read_source(Name, Opts0) ->
Opts = expand_opts(Opts0),
case read_source_1(Name, Opts) of
{ok, Forms} ->
check_forms(Forms, Name),
Forms;
{error, R} ->
edoc_report:error({"error reading file '~ts'.",
[edoc_lib:filename(Name)]}),
exit({error, R})
end.
read_source_1(Name, Opts) ->
case proplists:get_bool(preprocess, Opts) of
true ->
read_source_2(Name, Opts);
false ->
epp_dodger:quick_parse_file(Name, Opts ++ [{no_fail, false}])
end.
read_source_2(Name, Opts) ->
Includes = proplists:append_values(includes, Opts)
++ [filename:dirname(Name)],
Macros = proplists:append_values(macros, Opts),
%% epp:parse_file(Name, Includes, Macros).
parse_file(Name, Includes, Macros).
%% The code below has been copied from epp.erl.
%%
%% Copy the line of the last token to the last token that will be
%% part of the parse tree.
%%
%% The last line is used in edoc_extract:find_type_docs() to determine
%% if a type declaration is followed by a comment.
%% <example>
%% -type t() :: [
%% {tag, integer()}
%% ].
%% %% Protocol options.
%% </example>
%% The line of the dot token will be copied to the integer token.
parse_file(Name, Includes, Macros) ->
case parse_file(utf8, Name, Includes, Macros) of
invalid_unicode ->
parse_file(latin1, Name, Includes, Macros);
Ret ->
Ret
end.
parse_file(DefEncoding, Name, Includes, Macros) ->
Options = [{name, Name},
{includes, Includes},
{macros, Macros},
{default_encoding, DefEncoding}],
case epp:open([extra | Options]) of
{ok, Epp, Extra} ->
try parse_file(Epp) of
Forms ->
Encoding = proplists:get_value(encoding, Extra),
case find_invalid_unicode(Forms) of
invalid_unicode when Encoding =/= utf8 ->
invalid_unicode;
_ ->
{ok, Forms}
end
after _ = epp:close(Epp)
end;
Error ->
Error
end.
find_invalid_unicode([H|T]) ->
case H of
{error,{_Line,file_io_server,invalid_unicode}} ->
invalid_unicode;
_Other ->
find_invalid_unicode(T)
end;
find_invalid_unicode([]) -> none.
parse_file(Epp) ->
case scan_and_parse(Epp) of
{ok, Form} ->
[Form | parse_file(Epp)];
{error, E} ->
[{error, E} | parse_file(Epp)];
{eof, Location} ->
[{eof, Location}]
end.
scan_and_parse(Epp) ->
case epp:scan_erl_form(Epp) of
{ok, Toks0} ->
Toks = fix_last_line(Toks0),
case erl_parse:parse_form(Toks) of
{ok, Form} ->
{ok, Form};
Else ->
Else
end;
Else ->
Else
end.
fix_last_line(Toks0) ->
Toks1 = lists:reverse(Toks0),
LastLine = erl_scan:line(hd(Toks1)),
fll(Toks1, LastLine, []).
fll([{Category, Anno0, Symbol} | L], LastLine, Ts) ->
Anno = erl_anno:set_line(LastLine, Anno0),
lists:reverse(L, [{Category, Anno, Symbol} | Ts]);
fll([T | L], LastLine, Ts) ->
fll(L, LastLine, [T | Ts]);
fll(L, _LastLine, Ts) ->
lists:reverse(L, Ts).
check_forms(Fs, Name) ->
Fun = fun (F) ->
case erl_syntax:type(F) of
error_marker ->
case erl_syntax:error_marker_info(F) of
{L, M, D} ->
edoc_report:error(L, Name, {format_error, M, D});
Other ->
edoc_report:report(Name, "unknown error in "
"source code: ~w.", [Other])
end,
exit(error);
_ ->
ok
end
end,
lists:foreach(Fun, Fs).
%% @spec get_doc(File::filename()) -> {ModuleName, edoc_module()}
%% @equiv get_doc(File, [])
get_doc(File) ->
get_doc(File, []).
%% @spec get_doc(File::filename(), Options::proplist()) ->
%% {ModuleName, edoc_module()}
%% ModuleName = atom()
%%
%% @type edoc_module(). The EDoc documentation data for a module,
%% expressed as an XML document in {@link //xmerl. XMerL} format. See
%% the file <a href="../priv/edoc.dtd">`edoc.dtd'</a> for details.
%%
%% @doc Reads a source code file and extracts EDoc documentation data.
%% Note that without an environment parameter (see {@link get_doc/3}),
%% hypertext links may not be correct.
%%
%% Options:
%% <dl>
%% <dt>{@type {def, Macros@}}
%% </dt>
%% <dd><ul>
%% <li>`Macros' = {@type Macro | [Macro]}</li>
%% <li>`Macro' = {@type {Name::atom(), Text::string()@}}</li>
%% </ul>
%% Specifies a set of EDoc macro definitions. See
%% <a href="overview-summary.html#Macro_expansion">Inline macro expansion</a>
%% for details.
%% </dd>
%% <dt>{@type {hidden, boolean()@}}
%% </dt>
%% <dd>If the value is `true', documentation of hidden functions will
%% also be included. The default value is `false'.
%% </dd>
%% <dt>{@type {private, boolean()@}}
%% </dt>
%% <dd>If the value is `true', documentation of private functions will
%% also be included. The default value is `false'.
%% </dd>
%% <dt>{@type {todo, boolean()@}}
%% </dt>
%% <dd>If the value is `true', To-Do notes written using `@todo' or
%% `@TODO' tags will be included in the documentation. The default
%% value is `false'.
%% </dd>
%% </dl>
%%
%% See {@link read_source/2}, {@link read_comments/2} and {@link
%% edoc_lib:get_doc_env/3} for further options.
%%
%% @see get_doc/3
%% @see run/2
%% @see edoc_extract:source/5
%% @see read/2
%% @see layout/2
%% INHERIT-OPTIONS: get_doc/3
%% INHERIT-OPTIONS: edoc_lib:get_doc_env/3
get_doc(File, Opts) ->
Env = edoc_lib:get_doc_env(Opts),
get_doc(File, Env, Opts).
%% @spec get_doc(File::filename(), Env::edoc_lib:edoc_env(),
%% Options::proplist()) -> {ModuleName, edoc_module()}
%% ModuleName = atom()
%%
%% @doc Like {@link get_doc/2}, but for a given environment
%% parameter. `Env' is an environment created by {@link
%% edoc_lib:get_doc_env/3}.
%% INHERIT-OPTIONS: read_source/2, read_comments/2, edoc_extract:source/5
%% DEFER-OPTIONS: get_doc/2
get_doc(File, Env, Opts) ->
edoc_extract:source(File, Env, Opts).
