aboutsummaryrefslogtreecommitdiffstats
path: root/src/rlx_util.erl
blob: 5d3744d7cfcfa4d833915be8d0e9713262970566 (plain) (blame)
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
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
%% -*- erlang-indent-level: 4; indent-tabs-mode: nil; fill-column: 80 -*-
%%% 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 Trivial utility file to help handle common tasks
-module(rlx_util).

-export([get_code_paths/2,
         release_output_dir/2,
         make_script/2,
         mkdir_p/1,
         to_binary/1,
         to_string/1,
         to_atom/1,
         is_error/1,
         error_reason/1,
         indent/1,
         optional_to_string/1,
         wildcard_paths/1,
         render/1,
         render/2,
         load_file/3,
         template_files/0,
         escript_foldl/3,
         intensity/0,
         symlink_or_copy/2]).

-export([os_type/1]).

-define(DFLT_INTENSITY,   high).
-define(ONE_LEVEL_INDENT, "     ").

-include_lib("kernel/include/file.hrl").
%%============================================================================
%% types
%%============================================================================


%%============================================================================
%% API
%%============================================================================

%% @doc Generates the correct set of code paths for the system.
-spec get_code_paths(rlx_release:t(), file:name()) -> [file:name()].
get_code_paths(Release, OutDir) ->
    LibDir = filename:join(OutDir, "lib"),
    [filename:join([LibDir,
                    erlang:atom_to_list(rlx_app_info:name(App)) ++ "-" ++
                        rlx_app_info:original_vsn(App), "ebin"]) ||
        App <- rlx_release:application_details(Release)].

-spec release_output_dir(rlx_state:t(), rlx_release:t()) -> string().
release_output_dir(State, Release) ->
    OutputDir = rlx_state:output_dir(State),
    filename:join([OutputDir,
                   "releases",
                   rlx_release:vsn(Release)]).

-spec make_script([term()],
                  fun(([term()]) -> Res)) -> Res.
make_script(Options, RunFun) ->
    %% Erts 5.9 introduced a non backwards compatible option to
    %% erlang this takes that into account
    Erts = erlang:system_info(version),
    case ec_semver:gte(Erts, "5.9") of
        true ->
            RunFun([no_warn_sasl | Options]);
        _ ->
            RunFun(Options)
    end.

%% @doc Makes a directory including parent dirs if they are missing.
-spec mkdir_p(string()) -> ok | {error, Reason::file:posix()}.
mkdir_p(Path) ->
    %% We are exploiting a feature of ensuredir that that creates all
    %% directories up to the last element in the filename, then ignores
    %% that last element. This way we ensure that the dir is created
    %% and not have any worries about path names
    DirName = filename:join([filename:absname(Path), "tmp"]),
    filelib:ensure_dir(DirName).

%% @doc ident to the level specified
-spec indent(non_neg_integer()) -> iolist().
indent(Amount) when erlang:is_integer(Amount) ->
    [?ONE_LEVEL_INDENT || _ <- lists:seq(1, Amount)].

-spec to_binary(iolist() | binary()) -> binary().
to_binary(String) when erlang:is_list(String) ->
    erlang:iolist_to_binary(String);
to_binary(Bin) when erlang:is_binary(Bin) ->
    Bin.

-spec to_string(binary() | string() | atom()) -> string().
to_string(Binary) when erlang:is_binary(Binary) ->
    erlang:binary_to_list(Binary);
to_string(Atom) when erlang:is_atom(Atom) ->
    erlang:atom_to_list(Atom);
to_string(Else) when erlang:is_list(Else) ->
    Else.

-spec to_atom(atom() | string() | binary()) -> atom().
to_atom(Binary)
  when erlang:is_binary(Binary) ->
    erlang:list_to_atom(to_string(Binary));
to_atom(String)
  when erlang:is_list(String) ->
    erlang:list_to_atom(String);
to_atom(Atom)
  when erlang:is_atom(Atom) ->
    Atom.

%% @doc get the reason for a particular relx error
-spec error_reason(relx:error()) -> any().
error_reason({error, {_, Reason}}) ->
    Reason.
%% @doc check to see if the value is a relx error
-spec is_error(relx:error() | any()) -> boolean().
is_error({error, _}) ->
    true;
is_error(_) ->
    false.

%% @doc convert optional argument to empty string if undefined
optional_to_string(undefined) ->
    "";
optional_to_string(Value) when is_list(Value) ->
    case io_lib:printable_list(Value) of
        true ->
            Value;
        false ->
            ""
    end.

%% @doc expand wildcards and names in the given paths
-spec wildcard_paths([file:filename_all()]) -> [string()].
wildcard_paths(Paths) ->
    [filename:absname(Expanded) || Path <- Paths, Expanded <- wildcard(Path)].

%% In case the given directory does not expand,
%% we return it back in a list so we trigger the
%% proper error reportings.
-spec wildcard(file:filename_all()) -> [string()].
wildcard(Path) when is_binary(Path) ->
    wildcard(binary_to_list(Path));
wildcard(Path) when is_list(Path) ->
    case filelib:wildcard(Path) of
        []   -> [Path];
        Paths -> Paths
    end.

-spec render(binary() | iolist()) ->
                {ok, binary()} | {error, render_failed}.
render(Template) ->
    render(Template, []).

-spec render(binary() | iolist(), proplists:proplist()) ->
                {ok, binary()} | {error, render_failed}.
render(Template, Data) when is_list(Template) ->
    render(ec_cnv:to_binary(Template), Data);
render(Template, Data) when is_binary(Template) ->
    case catch bbmustache:render(Template, Data,
                                 [{key_type, atom}]) of
        Bin when is_binary(Bin) -> {ok, Bin};
        _ -> {error, render_failed}
    end.

load_file(Files, escript, Name) ->
    {Name, Bin} = lists:keyfind(Name, 1, Files),
    Bin;
load_file(_Files, file, Name) ->
    {ok, Bin} = file:read_file(Name),
    Bin.

template_files() ->
    find_priv_templates() ++ escript_files().

find_priv_templates() ->
    Files = filelib:wildcard(filename:join([code:priv_dir(relx), "templates", "*"])),
    lists:map(fun(File) ->
                      {ok, Bin} = file:read_file(File),
                      {filename:basename(File), Bin}
              end, Files).

%% Scan the current escript for available files
escript_files() ->
    try
        {ok, Files} = escript_foldl(
                        fun(Name, _, GetBin, Acc) ->
                                [{filename:basename(Name), GetBin()} | Acc]
                        end, [], filename:absname(escript:script_name())),
        Files
    catch
        _:_ ->
            []
    end.

escript_foldl(Fun, Acc, File) ->
    case escript:extract(File, []) of
        {ok, [_Shebang, _Comment, _EmuArgs, Body]} ->
            case Body of
                {source, BeamCode} ->
                    GetInfo = fun() -> file:read_file_info(File) end,
                    GetBin = fun() -> BeamCode end,
                    {ok, Fun(".", GetInfo, GetBin, Acc)};
                {beam, BeamCode} ->
                    GetInfo = fun() -> file:read_file_info(File) end,
                    GetBin = fun() -> BeamCode end,
                    {ok, Fun(".", GetInfo, GetBin, Acc)};
                {archive, ArchiveBin} ->
                    zip:foldl(Fun, Acc, {File, ArchiveBin})
            end;
        {error, _} = Error ->
            Error
    end.

symlink_or_copy(Source, Target) ->
    case file:make_symlink(Source, Target) of
        ok ->
            ok;
        {error, eexist} ->
            {error, eexist};
        {error, Err} ->
            case {os:type(), Err} of
                {{win32, _}, eperm} ->
                    % We get eperm on Windows if we do not have
                    %   SeCreateSymbolicLinkPrivilege
                    % Try the next alternative
                    win32_make_junction_or_copy(Source, Target);
                _ ->
                    % On other systems we try to copy next
                    cp_r(Source, Target)
            end
    end.

cp_r(Source, Target) ->
    ec_file:copy(Source, Target, [{recursive, true}, {fileinfo, [mode, time, owner, group]}]).

win32_make_junction_or_copy(Source, Target) ->
    case filelib:is_dir(Source) of
        true ->
            win32_make_junction(Source, Target);
        _ ->
            cp_r(Source, Target)
    end.

win32_make_junction(Source, Target) ->
    % The mklink will fail if the target already exists, check for that first
    case file:read_link_info(Target) of
        {error, enoent} ->
            win32_make_junction_cmd(Source, Target);
        {ok, #file_info{type = symlink}} ->
            case file:read_link(Target) of
                {ok, Source} ->
                    ok;
                {ok, _} ->
                    ok = file:del_dir(Target),
                    win32_make_junction_cmd(Source, Target);
                {error, Reason} ->
                    {error, {readlink, Reason}}
            end;
        {ok, #file_info{type = _Type}} ->
            % Directory already exists, so we overwrite the copy
            cp_r(Source, Target);
        Error ->
            Error
    end.

win32_make_junction_cmd(Source, Target) ->
    S = unicode:characters_to_list(Source),
    T = unicode:characters_to_list(Target),
    Cmd = "cmd /c mklink /j " ++ filename:nativename(T) ++ " " ++ filename:nativename(S),
    case os:cmd(Cmd) of
        "Junction created " ++ _ ->
            ok;
        [] ->
            % When mklink fails it prints the error message to stderr which
            % is not picked up by os:cmd() hence this case switch is for
            % an empty message
            cp_r(Source, Target)
    end.

%% @doc Returns the color intensity, we first check the application envorinment
%% if that is not set we check the environment variable RELX_COLOR.
intensity() ->
    case application:get_env(relx, color_intensity) of
        undefined ->
            R = case os:getenv("RELX_COLOR") of
                    "high" ->
                        high;
                    "low" ->
                        low;
                    _ ->
                        ?DFLT_INTENSITY
                end,
            application:set_env(relx, color_intensity, R),
            R;
        {ok, Mode} ->
            Mode
    end.

os_type(State) ->
  case include_erts_is_win32(State) of
    true -> {win32,nt};
    false -> os:type()
  end.

include_erts_is_win32(State) ->
  case rlx_state:get(State, include_erts, true) of
    true -> false;
    false -> false;
    Path -> is_win32_erts(Path,State)
  end.

is_win32_erts(Path,State) ->
  case filelib:wildcard(filename:join([Path,"bin","erl.exe"])) of
    [] -> false;
    _ ->
      ec_cmd_log:info(rlx_state:log(State),
        "Including Erts is win32 ~n", []),
      true
  end.




%%%===================================================================
%%% Test Functions
%%%===================================================================