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Diffstat (limited to 'src/rebar_upgrade.erl')
| -rw-r--r-- | src/rebar_upgrade.erl | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/src/rebar_upgrade.erl b/src/rebar_upgrade.erl new file mode 100644 index 0000000..4c0d2f7 --- /dev/null +++ b/src/rebar_upgrade.erl @@ -0,0 +1,206 @@ +%% -*- tab-width: 4;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 + 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"]) + ], + [ok = file:delete(F) || F <- 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). |