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%% -*- 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]).
%% public api
'generate-upgrade'(_Config, ReltoolFile) ->
case rebar_config:get_global(previous_release, false) of
false ->
?ABORT("previous_release=PATH is required to "
"create upgrade package~n", []);
OldVerPath ->
%% Run checks to make sure that building a package is possible
{NewName, NewVer} = run_checks(OldVerPath, ReltoolFile),
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, NewName, NewVer, NameVer),
%% Build the package
run_systools(NameVer, NewName),
%% Boot file changes
{ok, _} = boot_files(NewVer, NewName),
%% Extract upgrade and tar it back up with changes
make_tar(NameVer),
%% Clean up files that systools created
ok = cleanup(NameVer, NewName, NewVer),
%% Restore original path
true = code:set_path(OrigPath),
ok
end.
%% internal api
run_checks(OldVerPath, ReltoolFile) ->
true = prop_check(filelib:is_dir(OldVerPath),
"Release directory doesn't exist (~p)~n", [OldVerPath]),
{Name, Ver} = get_release_name(ReltoolFile),
NamePath = filename:join([".", Name]),
true = prop_check(filelib:is_dir(NamePath),
"Release directory doesn't exist (~p)~n", [NamePath]),
{NewName, NewVer} = get_release_version(Name, NamePath),
{OldName, OldVer} = get_release_version(Name, OldVerPath),
true = prop_check(NewName == OldName,
"New and old .rel release names do not match~n", []),
true = prop_check(Name == NewName,
"Reltool and .rel release names do not match~n", []),
true = prop_check(NewVer =/= OldVer,
"New and old .rel contain the same version~n", []),
true = prop_check(Ver == NewVer,
"Reltool and .rel versions do not match~n", []),
{NewName, NewVer}.
get_release_name(ReltoolFile) ->
%% expect sys to be the first proplist in reltool.config
case file:consult(ReltoolFile) of
{ok, [{sys, Config}| _]} ->
%% expect the first rel in the proplist to be the one you want
{rel, Name, Ver, _} = proplists:lookup(rel, Config),
{Name, Ver};
_ ->
?ABORT("Failed to parse ~s~n", [ReltoolFile])
end.
get_release_version(Name, Path) ->
[RelFile] = filelib:wildcard(filename:join([Path, "releases", "*",
Name ++ ".rel"])),
[BinDir|_] = re:replace(RelFile, Name ++ "\\.rel", ""),
{ok, [{release, {Name1, Ver}, _, _}]} =
file:consult(filename:join([binary_to_list(BinDir),
Name ++ ".rel"])),
{Name1, Ver}.
prop_check(true, _, _) -> true;
prop_check(false, Msg, Args) -> ?ABORT(Msg, Args).
setup(OldVerPath, NewName, NewVer, NameVer) ->
NewRelPath = filename:join([".", NewName]),
Src = filename:join([NewRelPath, "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([NewRelPath,
"lib", "*", "ebin"])),
filelib:wildcard(filename:join([NewRelPath, "*"]))
])).
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(Ver, Name) ->
ok = file:make_dir(filename:join([".", "releases"])),
ok = file:make_dir(filename:join([".", "releases", Ver])),
ok = file:make_symlink(filename:join(["start.boot"]),
filename:join([".", "releases", Ver, Name ++ ".boot"])),
{ok, _} = file:copy(filename:join([".", Name, "releases", Ver, "start_clean.boot"]),
filename:join([".", "releases", Ver, "start_clean.boot"])).
make_tar(NameVer) ->
Filename = NameVer ++ ".tar.gz",
ok = erl_tar:extract(Filename, [compressed]),
ok = file:delete(Filename),
{ok, Tar} = erl_tar:open(Filename, [write, compressed]),
ok = erl_tar:add(Tar, "lib", []),
ok = erl_tar:add(Tar, "releases", []),
ok = erl_tar:close(Tar),
?CONSOLE("~s upgrade package created~n", [NameVer]).
cleanup(NameVer, Name, Ver) ->
?DEBUG("Removing files needed for building the upgrade~n", []),
Files = [
filename:join([".", "releases", Ver, Name ++ ".boot"]),
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("releases"),
ok = remove_dir_tree("lib").
%% taken 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} = file:read_file_info(FilePath),
case FileInfo#file_info.type of
directory ->
{ok, DirFiles} = file:list_dir(FilePath),
remove_all_files(FilePath, DirFiles),
file:del_dir(FilePath);
_ ->
file:delete(FilePath)
end
end, Files).
|
