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|
%% -------------------------------------------------------------------
%%
%% 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]).
%% ===================================================================
%% Public API
%% ===================================================================
preprocess(Config, _) ->
%% Get the directory where we will place downloaded deps
DepsDir = rebar_config:get(Config, deps_dir, "deps"),
%% Process the list of deps from the configuration
case catch(process_deps(rebar_config:get(Config, deps, []), [], DepsDir)) of
Dirs when is_list(Dirs) ->
%% Filter out deps from config so sub-dirs don't wind up trying to d/l deps again
Config2 = rebar_config:delete(Config, deps),
{ok, Config2, Dirs};
{'EXIT', Reason} ->
?ABORT("Error while processing dependencies: ~p\n", [Reason])
end.
%% ===================================================================
%% 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) ->
?DEBUG("Process deps: ~p\n", [Rest]),
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()]).
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, _, _}) ->
Res = os:cmd("which hg"),
?DEBUG("which hg = ~p\n", [Res]),
case Res of
[] ->
false;
_ ->
true
end;
source_engine_avail(_) ->
false.
|
