overrides working except for transitive dep inheritance with lock file

src/rebar_app_info.erl

@@ -30,6 +30,8 @@
          dir/2,
          source/1,
          source/2,
+         state/1,
+         state/2,
          valid/1,
          valid/2]).
 
@@ -47,6 +49,7 @@
                      dep_level=0 :: integer(),
                      dir :: file:name(),
                      source :: string() | tuple() | undefined,
+                     state :: rebar_state:t() | undefined,
                      valid :: boolean()}).
 
 %%============================================================================
@@ -211,6 +214,14 @@ source(AppInfo=#app_info_t{}, Source) ->
 source(#app_info_t{source=Source}) ->
     Source.
 
+-spec state(t(), rebar_state:t() | undefined) -> t().
+state(AppInfo=#app_info_t{}, State) ->
+    AppInfo#app_info_t{state=State}.
+
+-spec state(t()) -> rebar_state:t() | undefined.
+state(#app_info_t{state=State}) ->
+    State.
+
 -spec valid(t()) -> boolean().
 valid(AppInfo=#app_info_t{valid=undefined}) ->
     rebar_app_discover:validate_application_info(AppInfo);

src/rebar_prv_compile.erl

@@ -67,8 +67,13 @@ format_error(Reason) ->
 build_apps(State, Apps) ->
     lists:foreach(fun(AppInfo) ->
                           AppDir = rebar_app_info:dir(AppInfo),
-                          C = rebar_config:consult(AppDir),
-                          S = rebar_state:new(State, C, AppDir),
+                          S = case rebar_app_info:state(AppInfo) of
+                                  undefined ->
+                                      C = rebar_config:consult(AppDir),
+                                      rebar_state:new(State, C, AppDir);
+                                  AppState ->
+                                      AppState
+                              end,
 
                           %% Legacy hook support
                           rebar_hooks:run_compile_hooks(AppDir, pre_hooks, compile, S),

src/rebar_prv_install_deps.erl

@@ -134,7 +134,7 @@ handle_deps(Profile, State, Deps, Update) ->
     {Packages, Graph} = rebar_packages:get_packages(State),
     %% Split source deps from pkg deps, needed to keep backwards compatibility
     DepsDir = rebar_dir:deps_dir(State),
-    {SrcDeps, PkgDeps} = parse_deps(DepsDir, Deps),
+    {SrcDeps, PkgDeps} = parse_deps(DepsDir, Deps, State),
 
     %% Fetch transitive src deps
     {State1, SrcApps, PkgDeps1, Seen} =
@@ -293,16 +293,23 @@ handle_dep(AppInfo, SrcDeps, PkgDeps, SrcApps, Level, State) ->
                         {rebar_app_info:t(), [rebar_app_info:t()], [pkg_dep()]}.
 handle_dep(State, DepsDir, AppInfo) ->
     Profiles = rebar_state:current_profiles(State),
+    Name = rebar_app_info:name(AppInfo),
+
     C = rebar_config:consult(rebar_app_info:dir(AppInfo)),
-    S = rebar_state:new(rebar_state:new(), C, rebar_app_info:dir(AppInfo)),
-    S1 = rebar_state:apply_profiles(S, Profiles),
-    Deps = rebar_state:get(S1, deps, []),
-    AppInfo1 = rebar_app_info:deps(AppInfo, rebar_state:deps_names(Deps)),
-    {SrcDeps, PkgDeps} = parse_deps(DepsDir, Deps),
-    {AppInfo1, SrcDeps, PkgDeps}.
+
+    S = rebar_app_info:state(AppInfo),
+    S1 = rebar_state:new(S, C, rebar_app_info:dir(AppInfo)),
+    S2 = rebar_state:apply_profiles(S1, Profiles),
+    S3 = rebar_state:apply_overrides(S2, Name),
+    AppInfo1 = rebar_app_info:state(AppInfo, S3),
+
+    Deps = rebar_state:get(S3, deps, []),
+    AppInfo2 = rebar_app_info:deps(AppInfo1, rebar_state:deps_names(Deps)),
+    {SrcDeps, PkgDeps} = parse_deps(DepsDir, Deps, S3),
+    {AppInfo2, SrcDeps, PkgDeps}.
 
 -spec maybe_fetch(rebar_app_info:t(), boolean() | {true, binary(), integer()},
-                 sets:set(binary())) -> boolean().
+                  sets:set(binary())) -> boolean().
 maybe_fetch(AppInfo, Update, Seen) ->
     AppDir = ec_cnv:to_list(rebar_app_info:dir(AppInfo)),
     Apps = rebar_app_discover:find_apps(["_checkouts"], all),
@@ -355,39 +362,44 @@ maybe_fetch(AppInfo, Update, Seen) ->
             end
     end.
 
--spec parse_deps(binary(), list()) -> {[rebar_app_info:t()], [pkg_dep()]}.
-parse_deps(DepsDir, Deps) ->
+-spec parse_deps(binary(), list(), list()) -> {[rebar_app_info:t()], [pkg_dep()]}.
+parse_deps(DepsDir, Deps, State) ->
     lists:foldl(fun({Name, Vsn}, {SrcDepsAcc, PkgDepsAcc}) when is_list(Vsn) ->
                         {SrcDepsAcc, [parse_goal(ec_cnv:to_binary(Name)
                                                 ,ec_cnv:to_binary(Vsn)) | PkgDepsAcc]};
                    (Name, {SrcDepsAcc, PkgDepsAcc}) when is_atom(Name) ->
                         {SrcDepsAcc, [ec_cnv:to_binary(Name) | PkgDepsAcc]};
                    ({Name, Source}, {SrcDepsAcc, PkgDepsAcc}) when is_tuple (Source) ->
-                        Dep = new_dep(DepsDir, Name, [], Source),
+                        Dep = new_dep(DepsDir, Name, [], Source, State),
                         {[Dep | SrcDepsAcc], PkgDepsAcc};
                    ({Name, Source}, {SrcDepsAcc, PkgDepsAcc}) when is_tuple (Source) ->
-                        Dep = new_dep(DepsDir, Name, [], Source),
+                        Dep = new_dep(DepsDir, Name, [], Source, State),
                         {[Dep | SrcDepsAcc], PkgDepsAcc};
                    ({Name, _Vsn, Source}, {SrcDepsAcc, PkgDepsAcc}) when is_tuple (Source) ->
-                        Dep = new_dep(DepsDir, Name, [], Source),
+                        Dep = new_dep(DepsDir, Name, [], Source, State),
                         {[Dep | SrcDepsAcc], PkgDepsAcc};
                    ({Name, Source, Level}, {SrcDepsAcc, PkgDepsAcc}) when is_tuple (Source)
-                                                                         , is_integer(Level) ->
-                        Dep = new_dep(DepsDir, Name, [], Source),
+                                                                        , is_integer(Level) ->
+                        Dep = new_dep(DepsDir, Name, [], Source, State),
                         {[Dep | SrcDepsAcc], PkgDepsAcc}
                 end, {[], []}, Deps).
 
-new_dep(DepsDir, Name, Vsn, Source) ->
-    Dirs = [ec_cnv:to_list(filename:join(DepsDir, Name))],
-    {ok, Dep} = case ec_lists:search(fun(Dir) ->
-                                             rebar_app_info:discover(Dir)
-                                     end, Dirs) of
-                    {ok, App, _} ->
+new_dep(DepsDir, Name, Vsn, Source, State) ->
+    Dir = ec_cnv:to_list(filename:join(DepsDir, Name)),
+    {ok, Dep} = case rebar_app_info:discover(Dir) of
+                    {ok, App} ->
                         {ok, App};
                     not_found ->
                         rebar_app_info:new(Name, Vsn, ec_cnv:to_list(filename:join(DepsDir, Name)))
                 end,
-    rebar_app_info:source(Dep, Source).
+    C = rebar_config:consult(rebar_app_info:dir(Dep)),
+    S = rebar_state:new(rebar_state:new(), C, rebar_app_info:dir(Dep)),
+
+    Overrides = rebar_state:get(State, overrides, []),
+    ParentOverrides = rebar_state:overrides(State),
+    Dep1 = rebar_app_info:state(Dep,
+                               rebar_state:overrides(S, ParentOverrides++Overrides)),
+    rebar_app_info:source(Dep1, Source).
 
 -spec parse_goal(binary(), binary()) -> pkg_dep().
 parse_goal(Name, Constraint) ->

src/rebar_state.erl

@@ -27,6 +27,9 @@
 
          deps_names/1,
 
+         overrides/1, overrides/2,
+         apply_overrides/2,
+
          prepend_hook/3, append_hook/3, hooks/2,
          providers/1, providers/2, add_provider/2]).
 
@@ -49,6 +52,7 @@
                   deps_to_build       = []          :: [rebar_app_into:t()],
                   all_deps            = []          :: [rebar_app_into:t()],
 
+                  overrides           = [],
                   providers           = []}).
 
 -export_type([t/0]).
@@ -150,6 +154,35 @@ command_parsed_args(#state_t{command_parsed_args=CmdArgs}) ->
 command_parsed_args(State, CmdArgs) ->
     State#state_t{command_parsed_args=CmdArgs}.
 
+apply_overrides(State=#state_t{overrides=Overrides}, AppName) ->
+    Name = binary_to_atom(AppName, utf8),
+
+    %% Inefficient. We want the order we get here though.
+    State1 = lists:foldl(fun({override, O}, StateAcc) ->
+                                 lists:foldl(fun({Key, Value}, StateAcc1) ->
+                                                     rebar_state:set(StateAcc1, Key, Value)
+                                             end, StateAcc, O);
+                            (_, StateAcc) ->
+                                 StateAcc
+                         end, State, Overrides),
+
+    State2 = lists:foldl(fun({override, N, O}, StateAcc) when N =:= Name ->
+                                 lists:foldl(fun({Key, Value}, StateAcc1) ->
+                                                     rebar_state:set(StateAcc1, Key, Value)
+                                             end, StateAcc, O);
+                            (_, StateAcc) ->
+                                 StateAcc
+                         end, State1, Overrides),
+
+    lists:foldl(fun({add, N, O}, StateAcc) when N =:= Name ->
+                        lists:foldl(fun({Key, Value}, StateAcc1) ->
+                                            OldValue = rebar_state:get(StateAcc1, Key, []),
+                                            rebar_state:set(StateAcc1, Key, Value++OldValue)
+                                    end, StateAcc, O);
+                   (_, StateAcc) ->
+                        StateAcc
+                end, State2, Overrides).
+
 apply_profiles(State, Profile) when not is_list(Profile) ->
     apply_profiles(State, [Profile]);
 apply_profiles(State, [default]) ->
@@ -200,6 +233,12 @@ deps_names(State) ->
     Deps = rebar_state:get(State, deps, []),
     deps_names(Deps).
 
+overrides(#state_t{overrides=Overrides}) ->
+    Overrides.
+
+overrides(State=#state_t{}, Overrides) ->
+    State#state_t{overrides=Overrides}.
+
 project_apps(#state_t{project_apps=Apps}) ->
     Apps.