summaryrefslogtreecommitdiff
path: root/src/rebar_upgrade.erl
blob: 0b39035dd6f8680389406a257f9b28e7507760cf (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
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
%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
%% ex: ts=4 sw=4 et
%% -------------------------------------------------------------------
%%
%% rebar: Erlang Build Tools
%%
%% Copyright (c) 2011 Joe Williams (joe@joetify.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_upgrade).

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

-export(['generate-upgrade'/2]).

-define(TMP, "_tmp").

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

'generate-upgrade'(_Config, ReltoolFile) ->
    %% Get the old release path
    ReltoolConfig = rebar_rel_utils:load_config(ReltoolFile),
    TargetParentDir = rebar_rel_utils:get_target_parent_dir(ReltoolConfig),
    TargetDir = rebar_rel_utils:get_target_dir(ReltoolConfig),

    OldVerPath = filename:join([TargetParentDir,
                      rebar_rel_utils:get_previous_release_path()]),

    %% Run checks to make sure that building a package is possible
    {NewVerPath, NewName, NewVer} = run_checks(OldVerPath, ReltoolConfig),
    NameVer = NewName ++ "_" ++ NewVer,

    %% Save the code path prior to doing anything
    OrigPath = code:get_path(),

    %% Prepare the environment for building the package
    ok = setup(OldVerPath, NewVerPath, NewName, NewVer, NameVer),

    %% Build the package
    run_systools(NameVer, NewName),

    %% Boot file changes
    {ok, _} = boot_files(TargetDir, NewVer, NewName),

    %% Extract upgrade and tar it back up with changes
    make_tar(NameVer),

    %% Clean up files that systools created
    ok = cleanup(NameVer),

    %% Restore original path
    true = code:set_path(OrigPath),

    ok.

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

run_checks(OldVerPath, ReltoolConfig) ->
    true = rebar_utils:prop_check(filelib:is_dir(OldVerPath),
                      "Release directory doesn't exist (~p)~n", [OldVerPath]),

    {Name, Ver} = rebar_rel_utils:get_reltool_release_info(ReltoolConfig),

    NewVerPath = filename:join([
                      rebar_rel_utils:get_target_parent_dir(ReltoolConfig),
                      Name]),
    true = rebar_utils:prop_check(filelib:is_dir(NewVerPath),
                      "Release directory doesn't exist (~p)~n", [NewVerPath]),

    {NewName, NewVer} = rebar_rel_utils:get_rel_release_info(Name, NewVerPath),
    {OldName, OldVer} = rebar_rel_utils:get_rel_release_info(Name, OldVerPath),

    true = rebar_utils:prop_check(NewName == OldName,
                      "New and old .rel release names do not match~n", []),
    true = rebar_utils:prop_check(Name == NewName,
                      "Reltool and .rel release names do not match~n", []),
    true = rebar_utils:prop_check(NewVer =/= OldVer,
                      "New and old .rel contain the same version~n", []),
    true = rebar_utils:prop_check(Ver == NewVer,
                      "Reltool and .rel versions do not match~n", []),

    {NewVerPath, NewName, NewVer}.

setup(OldVerPath, NewVerPath, NewName, NewVer, NameVer) ->
    Src = filename:join([NewVerPath, "releases",
                         NewVer, NewName ++ ".rel"]),
    Dst = filename:join([".", NameVer ++ ".rel"]),
    {ok, _} = file:copy(Src, Dst),
    ok = code:add_pathsa(
           lists:append([
                         filelib:wildcard(filename:join([OldVerPath,
                                                         "releases", "*"])),
                         filelib:wildcard(filename:join([OldVerPath,
                                                         "lib", "*", "ebin"])),
                         filelib:wildcard(filename:join([NewVerPath,
                                                         "lib", "*", "ebin"])),
                         filelib:wildcard(filename:join([NewVerPath, "*"]))
                        ])).

run_systools(NewVer, Name) ->
    Opts = [silent],
    NameList = [Name],
    case systools:make_relup(NewVer, NameList, NameList, Opts) of
        {error, _, _Message} ->
            ?ABORT("Systools aborted with: ~p~n", [_Message]);
        _ ->
            ?DEBUG("Relup created~n", []),
            case systools:make_script(NewVer, Opts) of
                {error, _, _Message1} ->
                    ?ABORT("Systools aborted with: ~p~n", [_Message1]);
                _ ->
                    ?DEBUG("Script created~n", []),
                    case systools:make_tar(NewVer, Opts) of
                        {error, _, _Message2} ->
                            ?ABORT("Systools aborted with: ~p~n", [_Message2]);
                        _ ->
                            ok
                    end
            end
    end.

boot_files(TargetDir, Ver, Name) ->
    ok = file:make_dir(filename:join([".", ?TMP])),
    ok = file:make_dir(filename:join([".", ?TMP, "releases"])),
    ok = file:make_dir(filename:join([".", ?TMP, "releases", Ver])),
    ok = file:make_symlink(
           filename:join(["start.boot"]),
           filename:join([".", ?TMP, "releases", Ver, Name ++ ".boot"])),
    {ok, _} = file:copy(
                filename:join([TargetDir, "releases", Ver, "start_clean.boot"]),
                filename:join([".", ?TMP, "releases", Ver, "start_clean.boot"])),
    {ok, _} = file:copy(
                filename:join([TargetDir, "releases", Ver, "vm.args"]),
                filename:join([".", ?TMP, "releases", Ver, "vm.args"])).

make_tar(NameVer) ->
    Filename = NameVer ++ ".tar.gz",
    {ok, Cwd} = file:get_cwd(),
    Absname = filename:join([Cwd, Filename]),
    ok = file:set_cwd(?TMP),
    ok = erl_tar:extract(Absname, [compressed]),
    ok = file:delete(Absname),
    {ok, Tar} = erl_tar:open(Absname, [write, compressed]),
    ok = erl_tar:add(Tar, "lib", []),
    ok = erl_tar:add(Tar, "releases", []),
    ok = erl_tar:close(Tar),
    ok = file:set_cwd(Cwd),
    ?CONSOLE("~s upgrade package created~n", [NameVer]).

cleanup(NameVer) ->
    ?DEBUG("Removing files needed for building the upgrade~n", []),
    Files = [
             filename:join([".", NameVer ++ ".rel"]),
             filename:join([".", NameVer ++ ".boot"]),
             filename:join([".", NameVer ++ ".script"]),
             filename:join([".", "relup"])
            ],
    lists:foreach(fun(F) -> ok = file:delete(F) end, Files),

    ok = remove_dir_tree(?TMP).

%% adapted from http://www.erlang.org/doc/system_principles/create_target.html
remove_dir_tree(Dir) ->
    remove_all_files(".", [Dir]).
remove_all_files(Dir, Files) ->
    lists:foreach(fun(File) ->
                          FilePath = filename:join([Dir, File]),
                          {ok, FileInfo, Link} = file_info(FilePath),
                          case {Link, FileInfo#file_info.type} of
                              {false, directory} ->
                                  {ok, DirFiles} = file:list_dir(FilePath),
                                  remove_all_files(FilePath, DirFiles),
                                  file:del_dir(FilePath);
                              _ ->
                                  file:delete(FilePath)
                          end
                  end, Files).

file_info(Path) ->
    case file:read_file_info(Path) of
        {ok, Info} ->
            {ok, Info, false};
        {error, enoent} ->
            {ok, Info} = file:read_link_info(Path),
            {ok, Info, true};
        Error ->
            Error
    end.