1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
|
%% -*- 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 provider uses the lib_dir setting of the state. It searches the
%%% Lib Dirs looking for all OTP Applications that are available. When it finds
%%% those OTP Applications it loads the information about them and adds them to
%%% the state of available apps. This implements the rcl_provider behaviour.
-module(rcl_prv_discover).
-behaviour(rcl_provider).
-export([init/1,
do/1,
format_error/1]).
-include_lib("relcool/include/relcool.hrl").
%%============================================================================
%% API
%%============================================================================
-spec init(rcl_state:t()) -> {ok, rcl_state:t()}.
init(State) ->
{ok, State}.
%% @doc recursively dig down into the library directories specified in the state
%% looking for OTP Applications
-spec do(rcl_state:t()) -> {ok, rcl_state:t()} | relcool:error().
do(State) ->
LibDirs = get_lib_dirs(State),
rcl_log:info(rcl_state:log(State),
fun() ->
["Resolving OTP Applications from directories:\n",
[[rcl_util:indent(1), LibDir, "\n"] || LibDir <- LibDirs]]
end),
AppMeta0 = lists:flatten(ec_plists:map(fun discover_dir/1, LibDirs)),
Errors = [case El of
{error, Ret} -> Ret;
_ -> El
end
|| El <- AppMeta0,
case El of
{error, _} ->
true;
_ ->
false
end],
lists:filter(fun({error, _}) -> true;
(_) -> false
end, AppMeta0),
case Errors of
[] ->
AppMeta1 = lists:flatten(AppMeta0),
rcl_log:debug(rcl_state:log(State),
fun() ->
["Resolved the following OTP Applications from the system: \n",
[[rcl_app_info:format(1, App), "\n"] || App <- AppMeta1]]
end),
{ok, rcl_state:available_apps(State, AppMeta1)};
_ ->
?RCL_ERROR(Errors)
end.
-spec format_error([ErrorDetail::term()]) -> iolist().
format_error(ErrorDetails)
when erlang:is_list(ErrorDetails) ->
[[format_detail(ErrorDetail), "\n"] || ErrorDetail <- ErrorDetails].
%%%===================================================================
%%% Internal Functions
%%%===================================================================
get_lib_dirs(State) ->
LibDirs0 = rcl_state:lib_dirs(State),
add_rebar_deps_dir(State, LibDirs0).
-spec add_rebar_deps_dir(rcl_state:t(), [file:name()]) -> [file:name()].
add_rebar_deps_dir(State, LibDirs) ->
ExcludeRebar = rcl_state:get(State, discover_exclude_rebar, false),
case ExcludeRebar of
true ->
add_system_lib_dir(State, LibDirs);
false ->
%% Check to see if there is a rebar.config. If so then look for a deps
%% dir. If both are there then we add that to the lib dirs.
{ok, Cwd} = file:get_cwd(),
RebarConfig = filename:join([Cwd, "rebar.config"]),
DepsDir = filename:join([Cwd, "deps"]),
case filelib:is_regular(RebarConfig) andalso filelib:is_dir(DepsDir) of
true ->
add_system_lib_dir(State, [filename:absname(Cwd) | LibDirs]);
false ->
add_system_lib_dir(State, LibDirs)
end
end.
-spec add_system_lib_dir(rcl_state:t(), [file:name()]) -> [file:name()].
add_system_lib_dir(State, LibDirs) ->
ExcludeSystem = rcl_state:get(State, discover_exclude_system, false),
case ExcludeSystem of
true ->
LibDirs;
false ->
SystemLibDir0 = code:lib_dir(),
case filelib:is_dir(SystemLibDir0) of
true ->
[SystemLibDir0 | LibDirs];
false ->
LibDirs
end
end.
-spec format_detail(ErrorDetail::term()) -> iolist().
format_detail({accessing, File, eaccess}) ->
io_lib:format("permission denied accessing file ~s", [File]);
format_detail({accessing, File, Type}) ->
io_lib:format("error (~p) accessing file ~s", [Type, File]);
format_detail({no_beam_files, EbinDir}) ->
io_lib:format("no beam files found in directory ~s", [EbinDir]);
format_detail({not_a_directory, EbinDir}) ->
io_lib:format("~s is not a directory when it should be a directory", [EbinDir]);
format_detail({unable_to_load_app, AppDir, _}) ->
io_lib:format("Unable to load the application metadata from ~s", [AppDir]);
format_detail({invalid_app_file, File}) ->
io_lib:format("Application metadata file exists but is malformed: ~s",
[File]);
format_detail({unversioned_app, AppDir, _AppName}) ->
io_lib:format("Application metadata exists but version is not available: ~s",
[AppDir]);
format_detail({app_info_error, Detail}) ->
rcl_app_info:format_error(Detail).
-spec discover_dir(file:name()) ->
[rcl_app_info:t() | {error, Reason::term()}] |
rcl_app_info:t() | {error, Reason::term()}.
discover_dir(File) ->
case filelib:is_dir(File) of
true ->
case file:list_dir(File) of
{error, Reason} ->
{error, {accessing, File, Reason}};
{ok, List} ->
ec_plists:map(fun discover_dir/1, [filename:join([File, Dir]) || Dir <- List])
end;
false ->
is_valid_otp_app(File)
end.
-spec is_valid_otp_app(file:name()) -> [rcl_app_info:t() | {error, Reason::term()} | []].
is_valid_otp_app(File) ->
%% Is this an ebin dir?
EbinDir = filename:dirname(File),
case filename:basename(EbinDir) of
"ebin" ->
case lists:suffix(".app", File) of
true ->
has_at_least_one_beam(EbinDir, File);
false ->
[]
end;
_ ->
[]
end.
-spec has_at_least_one_beam(file:name(), file:filename()) ->
rcl_app_info:t() | {error, Reason::term()}.
has_at_least_one_beam(EbinDir, File) ->
case file:list_dir(EbinDir) of
{ok, List} ->
case lists:any(fun(NFile) -> lists:suffix(".beam", NFile) end, List) of
true ->
gather_application_info(EbinDir, File);
false ->
{error, {no_beam_files, EbinDir}}
end;
_ ->
{error, {not_a_directory, EbinDir}}
end.
-spec gather_application_info(file:name(), file:filename()) ->
rcl_app_info:t() | {error, Reason::term()}.
gather_application_info(EbinDir, File) ->
AppDir = filename:dirname(EbinDir),
case file:consult(File) of
{ok, [{application, AppName, AppDetail}]} ->
get_vsn(AppDir, AppName, AppDetail);
{error, Reason} ->
{error, {unable_to_load_app, AppDir, Reason}};
_ ->
{error, {invalid_app_file, File}}
end.
-spec get_vsn(file:name(), atom(), proplists:proplist()) ->
rcl_app_info:t() | {error, Reason::term()}.
get_vsn(AppDir, AppName, AppDetail) ->
case proplists:get_value(vsn, AppDetail) of
undefined ->
{error, {unversioned_app, AppDir, AppName}};
AppVsn ->
case get_deps(AppDir, AppName, AppVsn, AppDetail) of
{ok, App} ->
App;
{error, Detail} ->
{error, {app_info_error, Detail}}
end
end.
-spec get_deps(file:name(), atom(), string(), proplists:proplist()) ->
{ok, rcl_app_info:t()} | {error, Reason::term()}.
get_deps(AppDir, AppName, AppVsn, AppDetail) ->
ActiveApps = proplists:get_value(applications, AppDetail, []),
LibraryApps = proplists:get_value(included_applications, AppDetail, []),
rcl_app_info:new(AppName, AppVsn, AppDir, ActiveApps, LibraryApps).
%%%===================================================================
%%% Test Functions
%%%===================================================================
-ifndef(NOTEST).
-include_lib("eunit/include/eunit.hrl").
-endif.
|
