%% -*- mode: Erlang; fill-column: 80; comment-column: 75; -*-
%%% Copyright 2012 Erlware, LLC. All Rights Reserved.
%%%
%%% This file is provided to you under the Apache License,
%%% Version 2.0 (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.apache.org/licenses/LICENSE-2.0
%%%
%%% Unless required by applicable law or agreed to in writing,
%%% software distributed under the License is distributed on an
%%% "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
%%% KIND, either express or implied. See the License for the
%%% specific language governing permissions and limitations
%%% under the License.
%%%---------------------------------------------------------------------------
%%% @author Eric Merritt <[email protected]>
%%% @copyright (C) 2012 Erlware, LLC.
%%%
%%% @doc This module represents useful, relevant information about an
%%% application. The relevant information is.
%%%
%%% <ul>
%%% <li> Name - The application name as an atom </li>
%%% <li> Vsn - The application version as a list </li>
%%% <li> The root directory of the application. The directory that contains the
%%% ebin/src/priv etc </li>
%%% <li> Active Deps - The Active or 'application' dependencies of the OTP
%%% App. That is the things in the 'applications' property of the application
%%% metadata </li>
%%% <li> Library Deps - The Inactive or Library dependencies of the ATP
%%% app. That is the things in the 'included_applications property of the
%%% application metadata.
%%% </ul>
%%%
-module(rcl_app_info).
-export([new/0,
new/5,
name/1,
name/2,
vsn/1,
vsn/2,
vsn_as_string/1,
dir/1,
dir/2,
active_deps/1,
active_deps/2,
library_deps/1,
library_deps/2,
format_error/1,
format/2,
format/1]).
-export_type([t/0]).
-include_lib("relcool/include/relcool.hrl").
-record(app_info_t, {name :: atom(),
vsn :: ec_semver:semver(),
dir :: file:name(),
active_deps :: [atom()],
library_deps :: [atom()]}).
%%============================================================================
%% types
%%============================================================================
-opaque t() :: record(app_info_t).
%%============================================================================
%% API
%% ============================================================================
%% @doc Build a new, empty, app info value. This is not of a lot of use and you
%% probably wont be doing this much.
-spec new() -> {ok, t()}.
new() ->
{ok, #app_info_t{}}.
%% @doc build a complete version of the app info with all fields set.
-spec new(atom(), string(), file:name(), [atom()], [atom()]) ->
{ok, t()} | relcool:error().
new(AppName, Vsn, Dir, ActiveDeps, LibraryDeps)
when erlang:is_atom(AppName),
erlang:is_list(Dir),
erlang:is_list(ActiveDeps),
erlang:is_list(LibraryDeps) ->
case parse_version(Vsn) of
{fail, _} ->
?RCL_ERROR({vsn_parse, AppName});
ParsedVsn ->
{ok, #app_info_t{name=AppName, vsn=ParsedVsn, dir=Dir,
active_deps=ActiveDeps,
library_deps=LibraryDeps}}
end.
-spec name(t()) -> atom().
name(#app_info_t{name=Name}) ->
Name.
-spec name(t(), atom()) -> t().
name(AppInfo=#app_info_t{}, AppName)
when erlang:is_atom(AppName) ->
AppInfo#app_info_t{name=AppName}.
-spec vsn(t()) -> ec_semver:semver().
vsn(#app_info_t{vsn=Vsn}) ->
Vsn.
-spec vsn_as_string(t()) -> string().
vsn_as_string(#app_info_t{vsn=Vsn}) ->
erlang:binary_to_list(erlang:iolist_to_binary(ec_semver:format(Vsn))).
-spec vsn(t(), string()) -> {ok, t()} | relcool:error().
vsn(AppInfo=#app_info_t{name=AppName}, AppVsn)
when erlang:is_list(AppVsn) ->
case parse_version(AppVsn) of
{fail, _} ->
?RCL_ERROR({vsn_parse, AppName});
ParsedVsn ->
{ok, AppInfo#app_info_t{vsn=ParsedVsn}}
end.
-spec dir(t()) -> file:name().
dir(#app_info_t{dir=Dir}) ->
Dir.
-spec dir(t(), file:name()) -> t().
dir(AppInfo=#app_info_t{}, Dir) ->
AppInfo#app_info_t{dir=Dir}.
-spec active_deps(t()) -> [atom()].
active_deps(#app_info_t{active_deps=Deps}) ->
Deps.
-spec active_deps(t(), [atom()]) -> t().
active_deps(AppInfo=#app_info_t{}, ActiveDeps)
when erlang:is_list(ActiveDeps) ->
AppInfo#app_info_t{active_deps=ActiveDeps}.
-spec library_deps(t()) -> [atom()].
library_deps(#app_info_t{library_deps=Deps}) ->
Deps.
-spec library_deps(t(), [atom()]) -> t().
library_deps(AppInfo=#app_info_t{}, LibraryDeps)
when erlang:is_list(LibraryDeps) ->
AppInfo#app_info_t{library_deps=LibraryDeps}.
-spec format_error(Reason::term()) -> iolist().
format_error({vsn_parse, AppName}) ->
io_lib:format("Error parsing version for ~p",
[AppName]).
-spec format(t()) -> iolist().
format(AppInfo) ->
format(0, AppInfo).
-spec format(non_neg_integer(), t()) -> iolist().
format(Indent, #app_info_t{name=Name, vsn=Vsn, dir=Dir,
active_deps=Deps, library_deps=LibDeps}) ->
[rcl_util:indent(Indent), erlang:atom_to_list(Name), "-", ec_semver:format(Vsn),
": ", Dir, "\n",
rcl_util:indent(Indent + 1), "Active Dependencies:\n",
[[rcl_util:indent(Indent + 2), erlang:atom_to_list(Dep), ",\n"] || Dep <- Deps],
rcl_util:indent(Indent + 1), "Library Dependencies:\n",
[[rcl_util:indent(Indent + 2), erlang:atom_to_list(LibDep), ",\n"] || LibDep <- LibDeps]].
%%%===================================================================
%%% Internal Functions
%%%===================================================================
parse_version(Vsn)
when erlang:is_list(Vsn) ->
ec_semver:parse(Vsn);
parse_version(Vsn = {_, {_, _}}) ->
Vsn.
