summaryrefslogtreecommitdiff
path: root/src/rebar_escripter.erl
blob: b51a2a5cbe634de75786f90c828ec7cae39750f8 (plain)
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
%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
%% ex: ts=4 sw=4 et
%% -------------------------------------------------------------------
%%
%% rebar: Erlang Build Tools
%%
%% Copyright (c) 2009 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.
%% -------------------------------------------------------------------
-module(rebar_escripter).

-export([escriptize/2,
         clean/2]).

-include("rebar.hrl").
-include_lib("kernel/include/file.hrl").

%% ===================================================================
%% Public API
%% ===================================================================

escriptize(Config, AppFile) ->
    %% Extract the application name from the archive -- this is the default
    %% name of the generated script
    AppName = rebar_app_utils:app_name(AppFile),

    %% Get the output filename for the escript -- this may include dirs
    Filename = rebar_config:get_local(Config, escript_name, AppName),
    ok = filelib:ensure_dir(Filename),

    %% Look for a list of other applications (dependencies) to include
    %% in the output file. We then use the .app files for each of these
    %% to pull in all the .beam files.
    InclBeams = get_app_beams(
                  rebar_config:get_local(Config, escript_incl_apps, []), []),

    %% Look for a list extra files to include in the output file.
    %% For internal rebar-private use only. Do not use outside rebar.
    InclExtra = get_extra(Config),

    %% Construct the archive of everything in ebin/ dir -- put it on the
    %% top-level of the zip file so that code loading works properly.
    Files = load_files("*", "ebin") ++ InclBeams ++ InclExtra,

    case zip:create("mem", Files, [memory]) of
        {ok, {"mem", ZipBin}} ->
            %% Archive was successfully created. Prefix that binary with our
            %% header and write to our escript file
            Shebang = rebar_config:get(Config, escript_shebang,
                                       "#!/usr/bin/env escript\n"),
            Comment = rebar_config:get(Config, escript_comment, "%%\n"),
            EmuArgs = rebar_config:get(Config, escript_emu_args, "%%!\n"),
            Script = iolist_to_binary([Shebang, Comment, EmuArgs, ZipBin]),
            case file:write_file(Filename, Script) of
                ok ->
                    ok;
                {error, WriteError} ->
                    ?ERROR("Failed to write ~p script: ~p\n",
                           [AppName, WriteError]),
                    ?ABORT
            end;
        {error, ZipError} ->
            ?ERROR("Failed to construct ~p escript: ~p\n",
                   [AppName, ZipError]),
            ?ABORT
    end,

    %% Finally, update executable perms for our script
    {ok, #file_info{mode = Mode}} = file:read_file_info(Filename),
    ok = file:change_mode(Filename, Mode bor 8#00111),
    ok.

clean(Config, AppFile) ->
    %% Extract the application name from the archive -- this is the default
    %% name of the generated script
    AppName = rebar_app_utils:app_name(AppFile),

    %% Get the output filename for the escript -- this may include dirs
    Filename = rebar_config:get_local(Config, escript_name, AppName),
    rebar_file_utils:delete_each([Filename]).

%% ===================================================================
%% Internal functions
%% ===================================================================

get_app_beams([], Acc) ->
    Acc;
get_app_beams([App | Rest], Acc) ->
    case code:lib_dir(App, ebin) of
        {error, bad_name} ->
            ?ABORT("Failed to get ebin/ directory for "
                   "~p escript_incl_apps.", [App]);
        Path ->
            Acc2 = [{filename:join([App, ebin, F]),
                     file_contents(filename:join(Path, F))} ||
                       F <- filelib:wildcard("*", Path)],
            get_app_beams(Rest, Acc2 ++ Acc)
    end.

get_extra(Config) ->
    Extra = rebar_config:get_local(Config, escript_incl_extra, []),
    lists:foldl(fun({Wildcard, Dir}, Files) ->
                        load_files(Wildcard, Dir) ++ Files
                end, [], Extra).

load_files(Wildcard, Dir) ->
    [read_file(Filename, Dir) || Filename <- filelib:wildcard(Wildcard, Dir)].

read_file(Filename, Dir) ->
    {Filename, file_contents(filename:join(Dir, Filename))}.

file_contents(Filename) ->
    {ok, Bin} = file:read_file(Filename),
    Bin.