%% -*- tab-width: 4;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_deps). -include("rebar.hrl"). -export([preprocess/2, distclean/2]). -define(HG_VERSION, "1.4"). %% =================================================================== %% Public API %% =================================================================== preprocess(Config, _) -> %% Get the directory where we will place downloaded deps. Take steps %% to ensure that if we're doing a multi-level build, all the deps will %% wind up in a single directory; avoiding potential pain from having %% multiple copies of the same dep scattered throughout the source tree. %% %% The first definition of deps_dir is the one we use; we also fully %% qualify it to ensure everyone sees it properly. case rebar_config:get_all(Config, deps_dir) of [] -> DepsDir = filename:absname("deps"); AllDirs -> DepsDir = filename:absname(hd(lists:reverse(AllDirs))) end, ?DEBUG("~s: Using deps dir: ~s\n", [rebar_utils:get_cwd(), DepsDir]), Config2 = rebar_config:set(Config, deps_dir, DepsDir), %% Process the list of local deps from the configuration case catch(process_deps(rebar_config:get_local(Config, deps, []), [], DepsDir)) of Dirs when is_list(Dirs) -> {ok, Config2, Dirs}; {'EXIT', Reason} -> ?ABORT("Error while processing dependencies: ~p\n", [Reason]) end. distclean(Config, _) -> %% Delete all the deps which we downloaded (or would have caused to be %% downloaded). DepsDir = rebar_config:get(Config, deps_dir, rebar_utils:get_cwd()), ?DEBUG("Delete deps: ~p\n", [rebar_config:get(Config, deps, [])]), delete_deps(rebar_config:get_local(Config, deps, []), DepsDir). %% =================================================================== %% Internal functions %% =================================================================== process_deps([], Acc, _Dir) -> Acc; process_deps([App | Rest], Acc, Dir) when is_atom(App) -> require_app(App, ".*"), process_deps(Rest, Acc, Dir); process_deps([{App, VsnRegex} | Rest], Acc, Dir) when is_atom(App) -> require_app(App, VsnRegex), process_deps(Rest, Acc, Dir); process_deps([{App, VsnRegex, Source} | Rest], Acc, Dir) -> case is_app_available(App, VsnRegex) of true -> process_deps(Rest, Acc, Dir); false -> %% App may not be on the code path, or the version that is doesn't %% match our regex. Either way, we want to pull our revision into %% the deps dir and try to use that require_source_engine(Source), AppDir = filename:join(Dir, App), use_source(AppDir, App, VsnRegex, Source), process_deps(Rest, [AppDir | Acc], Dir) end; process_deps([Other | _Rest], _Acc, _Dir) -> ?ABORT("Invalid dependency specification ~p in ~s\n", [Other, rebar_utils:get_cwd()]). delete_deps([], _DepsDir) -> ok; delete_deps([{App, _VsnRegex, _Source} | Rest], DepsDir) -> AppDir = filename:join(DepsDir, App), case filelib:is_dir(AppDir) of true -> ?INFO("Delete dependency dir ~s\n", [AppDir]), rebar_file_utils:rm_rf(AppDir); false -> ok end, delete_deps(Rest, DepsDir); delete_deps([_Other | Rest], DepsDir) -> delete_deps(Rest, DepsDir). require_app(App, VsnRegex) -> case is_app_available(App, VsnRegex) of true -> ok; false -> %% The requested app is not available on the code path ?ABORT("~s: Dependency ~s-~s not available.\n", [rebar_utils:get_cwd(), App, VsnRegex]) end. require_source_engine(Source) -> case source_engine_avail(Source) of true -> ok; false -> ?ABORT("No command line interface available to process ~p\n", [Source]) end. is_app_available(App, VsnRegex) -> case code:lib_dir(App) of {error, bad_name} -> false; Path -> is_app_available(App, VsnRegex, Path) end. is_app_available(App, VsnRegex, Path) -> case rebar_app_utils:is_app_dir(Path) of {true, AppFile} -> case rebar_app_utils:load_app_file(AppFile) of {ok, App, AppData} -> {vsn, Vsn} = lists:keyfind(vsn, 1, AppData), ?INFO("Looking for ~s-~s ; found ~s-~s at ~s\n", [App, VsnRegex, App, Vsn, Path]), case re:run(Vsn, VsnRegex, [{capture, none}]) of match -> true; nomatch -> ?WARN("~s has version ~p; requested regex was ~s\n", [AppFile, Vsn, VsnRegex]), false end; {ok, OtherApp, _} -> ?WARN("~s has application id ~p; expected ~p\n", [AppFile, OtherApp, App]), false; {error, Reason} -> ?ABORT("Failed to parse ~s: ~p\n", [AppFile, Reason]) end; false -> ?WARN("Expected ~s to be an app dir (containing ebin/*.app), but no .app found.\n", [Path]), false end. use_source(AppDir, App, VsnRegex, Source) -> use_source(AppDir, App, VsnRegex, Source, 3). use_source(_AppDir, _App, _VsnRegex, Source, 0) -> ?ABORT("Failed to acquire source from ~p after 3 tries.\n", [Source]); use_source(AppDir, App, VsnRegex, Source, Count) -> case filelib:is_dir(AppDir) of true -> %% Already downloaded -- verify the versioning matches up with our regex case is_app_available(App, VsnRegex, AppDir) of true -> %% Available version matches up -- we're good to go; add the %% app dir to our code path code:add_patha(filename:join(AppDir, ebin)), ok; false -> %% The app that was downloaded doesn't match up (or had %% errors or something). For the time being, abort. ?ABORT("Dependency dir ~s does not satisfy version regex ~s.\n", [AppDir, VsnRegex]) end; false -> download_source(AppDir, Source), use_source(AppDir, App, VsnRegex, Source, Count-1) end. download_source(AppDir, {hg, Url, Rev}) -> ok = filelib:ensure_dir(AppDir), Cmd = ?FMT("hg clone -u ~s ~s", [Rev, Url]), rebar_utils:sh(Cmd, [], filename:dirname(AppDir)). %% =================================================================== %% Source helper functions %% =================================================================== source_engine_avail({hg, _, _}) -> Path = os:find_executable("hg"), ?DEBUG("which hg = ~p\n", [Path]), case Path of false -> false; _ -> ensure_required_scm_client(hg, Path) end; source_engine_avail(_) -> false. %% We expect the initial part of the version string to be of the form: %% "Mercurial Distributed SCM (version 1.4.1+20091201)". Rebar %% requires version 1.4 or higher. ensure_required_scm_client(hg, Path) -> Info = os:cmd(Path ++ " --version"), case re:run(Info, "version (\\d*\.\\d*\.\\d*)", [{capture, all_but_first, list}]) of {match, [Vsn]} -> case Vsn >= ?HG_VERSION of true -> true; false -> ?ABORT("Rebar requires version ~p or higher of hg (~p)~n", [?HG_VERSION, Path]) end; _ -> false end.