wip: profiles

13 files changed, 215 insertions, 166 deletions

diff --git a/src/rebar.hrl b/src/rebar.hrl
index 794d738..260e188 100644
--- a/src/rebar.hrl
+++ b/src/rebar.hrl
@@ -13,11 +13,13 @@
 
 -define(FMT(Str, Args), lists:flatten(io_lib:format(Str, Args))).
 
--define(DEFAULT_BASE_DIR, "").
+-define(DEFAULT_BASE_DIR, "_build").
+-define(DEFAULT_PROFILE_DIR, "default").
 -define(DEFAULT_LIB_DIRS, ["_checkouts", "apps", "lib", "."]).
--define(DEFAULT_DEPS_DIR, "_deps").
--define(DEFAULT_PLUGINS_DIR, "_plugins").
--define(DEFAULT_TEST_DEPS_DIR, "_tdeps").
+-define(DEFAULT_DEPS_DIR, "lib").
+-define(DEFAULT_PLUGINS_DIR, "plugins").
+-define(DEFAULT_TEST_DEPS_DIR, "test/lib").
+-define(DEFAULT_RELEASE_DIR, "rel").
 -define(DEFAULT_CONFIG_FILE, "rebar.config").
 -define(LOCK_FILE, "rebar.lock").
 -define(CONFIG_DIR, ".rebar3").
diff --git a/src/rebar3.erl b/src/rebar3.erl
index 40f80d3..5ea62e6 100644
--- a/src/rebar3.erl
+++ b/src/rebar3.erl
@@ -107,12 +107,9 @@ run_aux(State, RawArgs) ->
     inets:start(),
 
     %% Process each command, resetting any state between each one
-    State2 = case rebar_state:get(State, base_dir, undefined) of
-                 undefined ->
-                     rebar_state:set(State, base_dir, filename:absname(rebar_state:dir(State)));
-                 Dir ->
-                     rebar_state:set(State, base_dir, filename:absname(Dir))
-             end,
+    BaseDir = rebar_utils:base_dir(State),
+    State2 = rebar_state:set(State, base_dir,
+                            filename:join(filename:absname(rebar_state:dir(State)), BaseDir)),
 
     {ok, Providers} = application:get_env(rebar, providers),
 
diff --git a/src/rebar_core.erl b/src/rebar_core.erl
index b2af936..7dacc50 100644
--- a/src/rebar_core.erl
+++ b/src/rebar_core.erl
@@ -40,15 +40,18 @@ process_command(State, Command) ->
         not_found ->
             {error, io_lib:format("Command ~p not found", [Command])};
         CommandProvider ->
+            Profile = providers:profile(CommandProvider),
+            State1 = rebar_state:current_profile(State, Profile),
+            State2 = rebar_state:apply_profile(State1, Profile),
             Opts = providers:opts(CommandProvider)++rebar3:global_option_spec_list(),
             case Command of
                 do ->
-                    do(TargetProviders, State);
+                    do(TargetProviders, State2);
                 _ ->
-                    case getopt:parse(Opts, rebar_state:command_args(State)) of
+                    case getopt:parse(Opts, rebar_state:command_args(State2)) of
                         {ok, Args} ->
-                            State2 = rebar_state:command_parsed_args(State, Args),
-                            do(TargetProviders, State2);
+                            State3 = rebar_state:command_parsed_args(State2, Args),
+                            do(TargetProviders, State3);
                         {error, {invalid_option, Option}} ->
                             {error, io_lib:format("Invalid option ~s on task ~p", [Option, Command])}
                     end
@@ -58,22 +61,22 @@ process_command(State, Command) ->
 -spec do([atom()], rebar_state:t()) -> {ok, rebar_state:t()} | {error, string()}.
 do([], State) ->
     {ok, State};
-do([ProviderName | Rest], State) ->
+do([{ProviderName, Profile} | Rest], State) ->
+    State1 = rebar_state:current_profile(State, Profile),
     Provider = providers:get_provider(ProviderName
-                                     ,rebar_state:providers(State)),
-    case providers:do(Provider, State) of
-        {ok, State1} ->
-            do(Rest, State1);
+                                     ,rebar_state:providers(State1)),
+    case providers:do(Provider, State1) of
+        {ok, State2} ->
+            do(Rest, State2);
         {error, Error} ->
             {error, Error}
     end.
 
 update_code_path(State) ->
     true = rebar_utils:expand_code_path(),
-    BaseDir = rebar_state:get(State, base_dir, ?DEFAULT_BASE_DIR),
-    LibDirs = rebar_state:get(State, lib_dirs, ?DEFAULT_LIB_DIRS),
-    DepsDir = filename:join(BaseDir, rebar_state:get(State, deps_dir, ?DEFAULT_DEPS_DIR)),
-    PluginsDir = filename:join(BaseDir, rebar_state:get(State, plugins_dir, ?DEFAULT_PLUGINS_DIR)),
+    LibDirs = rebar_utils:lib_dirs(State),
+    DepsDir = rebar_utils:deps_dir(State),
+    PluginsDir = rebar_utils:plugins_dir(State),
     _UpdatedCodePaths = update_code_path_([DepsDir, PluginsDir | LibDirs]).
 
 
diff --git a/src/rebar_digraph.erl b/src/rebar_digraph.erl
index 27bbdd2..bb031cb 100644
--- a/src/rebar_digraph.erl
+++ b/src/rebar_digraph.erl
@@ -32,9 +32,15 @@ add(Graph, {PkgName, Deps}) ->
     end,
 
     lists:foreach(fun(DepName) ->
-                          V3 = case digraph:vertex(Graph, DepName) of
+                          case DepName of
+                              {Name, _Vsn} ->
+                                  Name;
+                              Name ->
+                                  Name
+                          end,
+                          V3 = case digraph:vertex(Graph, Name) of
                                    false ->
-                                       digraph:add_vertex(Graph, DepName);
+                                       digraph:add_vertex(Graph, Name);
                                    {V2, []} ->
                                        V2
                                end,
@@ -94,5 +100,5 @@ names_to_apps(Names, Apps) ->
 -spec find_app_by_name(atom(), [rebar_app_info:t()]) -> {ok, rebar_app_info:t()} | error.
 find_app_by_name(Name, Apps) ->
     ec_lists:find(fun(App) ->
-                          ec_cnv:to_atom(rebar_app_info:name(App)) =:= ec_cnv:to_atom(Name)
+                          binary_to_atom(rebar_app_info:name(App), utf8) =:= binary_to_atom(Name, utf8)
                   end, Apps).
diff --git a/src/rebar_hooks.erl b/src/rebar_hooks.erl
index 3e6d533..e64b7eb 100644
--- a/src/rebar_hooks.erl
+++ b/src/rebar_hooks.erl
@@ -4,7 +4,7 @@
 
 run_compile_hooks(Dir, Type, Command, State) ->
     Hooks = rebar_state:get(State, Type, []),
-    Env = [{"REBAR_DEPS_DIR", rebar_prv_install_deps:get_deps_dir(State)}],
+    Env = [{"REBAR_DEPS_DIR", rebar_utils:deps_dir(State)}],
     lists:foreach(fun({_, C, _}=Hook) when C =:= Command ->
                           apply_hook(Dir, Env, Hook);
                      ({C, _}=Hook) when C =:= Command ->
diff --git a/src/rebar_prv_common_test.erl b/src/rebar_prv_common_test.erl
index 59f5565..d14144f 100644
--- a/src/rebar_prv_common_test.erl
+++ b/src/rebar_prv_common_test.erl
@@ -12,7 +12,7 @@
 -include("rebar.hrl").
 
 -define(PROVIDER, ct).
--define(DEPS, [test_deps, compile]).
+-define(DEPS, [{install_deps, default}, compile]).
 
 %% ===================================================================
 %% Public API
@@ -27,7 +27,8 @@ init(State) ->
                                  {example, "rebar ct"},
                                  {short_desc, "Run Common Tests"},
                                  {desc, ""},
-                                 {opts, ct_opts(State)}]),
+                                 {opts, ct_opts(State)},
+                                 {profile, test}]),
     State1 = rebar_state:add_provider(State, Provider),
     {ok, State1}.
 
@@ -36,8 +37,7 @@ do(State) ->
     {Opts, _} = rebar_state:command_parsed_args(State),
     Opts1 = transform_opts(Opts),
     ok = create_dirs(Opts1),
-    expand_test_deps(filename:absname(rebar_state:get(State, test_deps_dir,
-                                                      ?DEFAULT_TEST_DEPS_DIR))),
+    expand_test_deps(filename:join(rebar_utils:profile_dir(State), ?DEFAULT_DEPS_DIR)),
     case ct:run_test(Opts1) of
         {_, 0, _} -> {ok, State};
         {_, FailedCount, _} -> {error, {?MODULE, {failures_running_tests,
diff --git a/src/rebar_prv_install_deps.erl b/src/rebar_prv_install_deps.erl
index 9822b32..7fdddac 100644
--- a/src/rebar_prv_install_deps.erl
+++ b/src/rebar_prv_install_deps.erl
@@ -37,10 +37,6 @@
 -export([handle_deps/2,
          handle_deps/3]).
 
-%% for internal use only
--export([get_deps_dir/1]).
--export([get_deps_dir/2]).
-
 -define(PROVIDER, install_deps).
 -define(DEPS, [app_discovery]).
 
@@ -67,11 +63,12 @@ init(State) ->
 
 -spec do(rebar_state:t()) -> {ok, rebar_state:t()} | {error, string()}.
 do(State) ->
+    Profile = rebar_state:current_profile(State),
     ProjectApps = rebar_state:project_apps(State),
     try
         {ok, State1} = case rebar_state:get(State, locks, []) of
                            [] ->
-                               handle_deps(State, rebar_state:get(State, deps, []));
+                               handle_deps(State, rebar_state:get(State, {deps, Profile}, []));
                            Locks ->
                                handle_deps(State, Locks)
                        end,
@@ -94,16 +91,6 @@ do(State) ->
 format_error(Reason) ->
     io_lib:format("~p", [Reason]).
 
--spec get_deps_dir(rebar_state:t()) -> file:filename_all().
-get_deps_dir(State) ->
-    BaseDir = rebar_state:get(State, base_dir, ""),
-    DepsDir = rebar_state:get(State, deps_dir, ?DEFAULT_DEPS_DIR),
-    get_deps_dir(BaseDir, DepsDir).
-
--spec get_deps_dir(file:filename_all(), file:filename_all()) -> file:filename_all().
-get_deps_dir(DepsDir, App) ->
-    filename:join(DepsDir, App).
-
 -spec handle_deps(rebar_state:t(), [dep()]) -> {ok, rebar_state:t()}.
 handle_deps(State, Deps) ->
     handle_deps(State, Deps, false).
@@ -117,8 +104,8 @@ handle_deps(State, Deps, Update) ->
     {Packages, Graph} = rebar_packages:get_packages(State),
 
     %% Split source deps from pkg deps, needed to keep backwards compatibility
-    DepsDir = get_deps_dir(State),
-    {SrcDeps, PkgDeps} = parse_deps(DepsDir, Deps),
+    DepsDir = rebar_utils:deps_dir(State),
+    {SrcDeps, PkgDeps} = parse_deps(State, DepsDir, Deps),
     State1 = rebar_state:src_deps(rebar_state:pkg_deps(State, PkgDeps),
                                   SrcDeps),
 
@@ -144,7 +131,7 @@ handle_deps(State, Deps, Update) ->
                                  AppInfo <- package_to_app(DepsDir
                                                           ,Packages
                                                           ,Pkg),
-                                 maybe_fetch(AppInfo, Update, sets:new())]
+                                 maybe_fetch(State2, AppInfo, Update, sets:new())]
              end,
 
     AllDeps = lists:ukeymerge(2
@@ -152,7 +139,8 @@ handle_deps(State, Deps, Update) ->
                              ,lists:ukeysort(2, Solved)),
     %% Sort all apps to build order
     State3 = rebar_state:set(State2, all_deps, AllDeps),
-    {ok, State3}.
+    State4 = rebar_state:set(State3, {all_deps, rebar_state:current_profile(State)}, AllDeps),
+    {ok, State4}.
 
 %% ===================================================================
 %% Internal functions
@@ -167,7 +155,7 @@ package_to_app(DepsDir, Packages, {Name, Vsn}) ->
             Link = proplists:get_value(<<"link">>, P, ""),
             {ok, AppInfo} = rebar_app_info:new(Name, Vsn),
             AppInfo1 = rebar_app_info:deps(AppInfo, PkgDeps),
-            AppInfo2 = rebar_app_info:dir(AppInfo1, get_deps_dir(DepsDir, Name)),
+            AppInfo2 = rebar_app_info:dir(AppInfo1, rebar_utils:deps_dir(DepsDir, Name)),
             [rebar_app_info:source(AppInfo2, {pkg, Name, Vsn, Link})]
     end.
 
@@ -188,7 +176,7 @@ update_src_deps(Level, State, Update, Seen) ->
                                                       ,Level
                                                       ,StateAcc);
                                      _ ->
-                                         maybe_fetch(AppInfo, false, SeenAcc),
+                                         maybe_fetch(StateAcc, AppInfo, false, SeenAcc),
                                          handle_dep(AppInfo
                                                    ,SrcDepsAcc
                                                    ,PkgDepsAcc
@@ -213,7 +201,7 @@ handle_update(AppInfo, UpdateName, UpdateLevel, SrcDeps, PkgDeps, Level, State)
     case UpdateLevel < DepLevel
         orelse Name =:= UpdateName of
         true ->
-            case maybe_fetch(AppInfo, true, []) of
+            case maybe_fetch(State, AppInfo, true, []) of
                 true ->
                     handle_dep(AppInfo
                               ,SrcDeps
@@ -229,29 +217,38 @@ handle_update(AppInfo, UpdateName, UpdateLevel, SrcDeps, PkgDeps, Level, State)
     end.
 
 handle_dep(AppInfo, SrcDeps, PkgDeps, Level, State) ->
-    DepsDir = get_deps_dir(State),
+    DepsDir = rebar_utils:deps_dir(State),
     {AppInfo1, NewSrcDeps, NewPkgDeps} =
-        handle_dep(DepsDir, AppInfo),
+        handle_dep(State, DepsDir, AppInfo),
     AppInfo2 = rebar_app_info:dep_level(AppInfo1, Level),
     {NewSrcDeps ++ SrcDeps
     ,NewPkgDeps++PkgDeps
     ,rebar_state:src_apps(State, AppInfo2)}.
 
--spec handle_dep(file:filename_all(), rebar_app_info:t()) ->
+-spec handle_dep(rebar_state:t(), file:filename_all(), rebar_app_info:t()) ->
                         {rebar_app_info:t(), [rebar_app_info:t()], [pkg_dep()]}.
-handle_dep(DepsDir, AppInfo) ->
+handle_dep(State, DepsDir, AppInfo) ->
+    Profile = rebar_state:current_profile(State),
     C = rebar_config:consult(rebar_app_info:dir(AppInfo)),
     S = rebar_state:new(rebar_state:new(), C, rebar_app_info:dir(AppInfo)),
-    Deps = rebar_state:get(S, deps, []),
-    AppInfo1 = rebar_app_info:deps(AppInfo, rebar_state:deps_names(S)),
-    {SrcDeps, PkgDeps} = parse_deps(DepsDir, Deps),
+    S1 = rebar_state:apply_profile(S, Profile),
+    Deps = case Profile of
+               default ->
+                   rebar_state:get(S1, {deps, Profile}, []);
+               _ ->
+                   rebar_state:get(S1, {deps, default}, []) ++
+                       rebar_state:get(S1, {deps, Profile}, [])
+           end,
+    AppInfo1 = rebar_app_info:deps(AppInfo, rebar_state:deps_names(Deps)),
+    {SrcDeps, PkgDeps} = parse_deps(State, DepsDir, Deps),
     {AppInfo1, SrcDeps, PkgDeps}.
 
--spec maybe_fetch(rebar_app_info:t(), boolean() | {true, binary(), integer()},
+-spec maybe_fetch(rebar_state:t(), rebar_app_info:t(), boolean() | {true, binary(), integer()},
                  sets:set(binary())) -> boolean().
-maybe_fetch(AppInfo, Update, Seen) ->
+maybe_fetch(State, AppInfo, Update, Seen) ->
     AppDir = ec_cnv:to_list(rebar_app_info:dir(AppInfo)),
-    Apps = rebar_app_discover:find_apps(["_checkouts"], all),
+    DefaultProfileDeps = rebar_utils:default_profile_deps(State),
+    Apps = rebar_app_discover:find_apps(["_checkouts", DefaultProfileDeps], all),
     case rebar_app_utils:find(rebar_app_info:name(AppInfo), Apps) of
         {ok, _} ->
             %% Don't fetch dep if it exists in the _checkouts dir
@@ -301,28 +298,31 @@ maybe_fetch(AppInfo, Update, Seen) ->
             end
     end.
 
--spec parse_deps(binary(), [dep()]) -> {[rebar_app_info:t()], [pkg_dep()]}.
-parse_deps(DepsDir, Deps) ->
+-spec parse_deps(rebar_state:t(), binary(), [dep()]) -> {[rebar_app_info:t()], [pkg_dep()]}.
+parse_deps(State, DepsDir, Deps) ->
     lists:foldl(fun({Name, Vsn}, {SrcDepsAcc, PkgDepsAcc}) ->
                         {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, Vsn, Source}, {SrcDepsAcc, PkgDepsAcc}) when is_tuple (Source) ->
-                        Dep = new_dep(DepsDir, Name, Vsn, Source),
+                        Dep = new_dep(State, DepsDir, Name, Vsn, Source),
                         {[Dep | SrcDepsAcc], PkgDepsAcc};
                    ({Name, Vsn, Source, _Level}, {SrcDepsAcc, PkgDepsAcc}) when is_tuple (Source) ->
-                        Dep = new_dep(DepsDir, Name, Vsn, Source),
+                        Dep = new_dep(State, DepsDir, Name, Vsn, Source),
                         {[Dep | SrcDepsAcc], PkgDepsAcc}
                 end, {[], []}, Deps).
 
-new_dep(DepsDir, Name, Vsn, Source) ->
-    Dir = ec_cnv:to_list(get_deps_dir(DepsDir, Name)),
-    {ok, Dep} = case rebar_app_info:discover(Dir) of
-                    {ok, App} ->
+new_dep(State, DepsDir, Name, Vsn, Source) ->
+    Dirs = [ec_cnv:to_list(filename:join(rebar_utils:default_profile_deps(State), Name)),
+            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, _} ->
                         {ok, App};
                     not_found ->
-                        rebar_app_info:new(Name, Vsn, Dir)
+                        rebar_app_info:new(Name, Vsn, ec_cnv:to_list(filename:join(DepsDir, Name)))
                 end,
     rebar_app_info:source(Dep, Source).
 
diff --git a/src/rebar_prv_lock.erl b/src/rebar_prv_lock.erl
index 4ada1ef..1de8083 100644
--- a/src/rebar_prv_lock.erl
+++ b/src/rebar_prv_lock.erl
@@ -31,13 +31,14 @@ init(State) ->
 do(State) ->
     case rebar_state:get(State, locks, []) of
         [] ->
-            AllDeps = rebar_state:get(State, all_deps, []),
+            AllDeps = rebar_state:get(State, {all_deps, default}, []),
             Locks = lists:map(fun(Dep) ->
                                       Dir = rebar_app_info:dir(Dep),
+                                      Source = rebar_app_info:source(Dep),
 
                                       %% If source is tuple it is a source dep
                                       %% e.g. {git, "git://github.com/ninenines/cowboy.git", "master"}
-                                      case rebar_app_info:source(Dep) of
+                                      case Source of
                                           Source when is_tuple(Source) ->
                                               {rebar_app_info:name(Dep)
                                               ,rebar_app_info:original_vsn(Dep)
diff --git a/src/rebar_prv_release.erl b/src/rebar_prv_release.erl
index cbbb473..7ec8ead 100644
--- a/src/rebar_prv_release.erl
+++ b/src/rebar_prv_release.erl
@@ -12,7 +12,7 @@
 -include("rebar.hrl").
 
 -define(PROVIDER, release).
--define(DEPS, [compile]).
+-define(DEPS, [{compile, default}, compile]).
 
 %% ===================================================================
 %% Public API
@@ -33,16 +33,16 @@ init(State) ->
 -spec do(rebar_state:t()) -> {ok, rebar_state:t()} | {error, string()}.
 do(State) ->
     Options = rebar_state:command_args(State),
-    DepsDir = rebar_prv_install_deps:get_deps_dir(State),
-    OutputDir = filename:join(rebar_state:get(State, base_dir, ?DEFAULT_BASE_DIR), "_rel"),
+    DepsDir = [rebar_utils:default_deps_dir(State)], % rebar_utils:deps_dir(State)],
+    OutputDir = filename:join(rebar_utils:profile_dir(State), ?DEFAULT_RELEASE_DIR),
     AllOptions = string:join(["release" | Options], " "),
     try
         case rebar_state:get(State, relx, []) of
             [] ->
-                relx:main([{lib_dirs, [DepsDir]}
+                relx:main([{lib_dirs, DepsDir}
                           ,{output_dir, OutputDir}], AllOptions);
             Config ->
-                relx:main([{lib_dirs, [DepsDir]}
+                relx:main([{lib_dirs, DepsDir}
                           ,{config, Config}
                           ,{output_dir, OutputDir}], AllOptions)
         end,
diff --git a/src/rebar_prv_tar.erl b/src/rebar_prv_tar.erl
index a340ba9..34a9153 100644
--- a/src/rebar_prv_tar.erl
+++ b/src/rebar_prv_tar.erl
@@ -32,14 +32,18 @@ init(State) ->
 
 -spec do(rebar_state:t()) -> {ok, rebar_state:t()} | {error, string()}.
 do(State) ->
+    OutputDir = filename:join(rebar_utils:profile_dir(State), ?DEFAULT_RELEASE_DIR),
     Options = rebar_state:command_args(State),
-    DepsDir = rebar_prv_install_deps:get_deps_dir(State),
+    DepsDir = rebar_utils:deps_dir(State),
     AllOptions = string:join(["release", "tar" | Options], " "),
     case rebar_state:get(State, relx, []) of
         [] ->
-            relx:main([{lib_dirs, [DepsDir]}], AllOptions);
+            relx:main([{lib_dirs, [DepsDir]
+                       ,{output_dir, OutputDir}}], AllOptions);
         Config ->
-            relx:main([{lib_dirs, [DepsDir]}, {config, Config}], AllOptions)
+            relx:main([{lib_dirs, [DepsDir]}
+                      ,{config, Config}
+                      ,{output_dir, OutputDir}], AllOptions)
     end,
     {ok, State}.
 
diff --git a/src/rebar_prv_test_deps.erl b/src/rebar_prv_test_deps.erl
deleted file mode 100644
index b7341d0..0000000
--- a/src/rebar_prv_test_deps.erl
+++ /dev/null
@@ -1,61 +0,0 @@
--module(rebar_prv_test_deps).
-
--behaviour(provider).
-
--export([init/1,
-         do/1,
-         format_error/1]).
-
--include("rebar.hrl").
-
--define(PROVIDER, test_deps).
--define(DEPS, []).
-
-%% ===================================================================
-%% Public API
-%% ===================================================================
-
--spec init(rebar_state:t()) -> {ok, rebar_state:t()}.
-init(State) ->
-    State1 = rebar_state:add_provider(State, providers:create([{name, ?PROVIDER},
-                                                               {module, ?MODULE},
-                                                               {bare, true},
-                                                               {deps, ?DEPS},
-                                                               {hooks, {[], []}},
-                                                               {example, undefined},
-                                                               {short_desc, "Install dependencies needed only for testing."},
-                                                               {desc, ""},
-                                                               {opts, []}])),
-    {ok, State1}.
-
--spec do(rebar_state:t()) -> {ok, rebar_state:t()} | {error, string()}.
-do(State) ->
-    ProjectApps = rebar_state:project_apps(State),
-    TestDeps = rebar_state:get(State, test_deps, []),
-    Names = [ec_cnv:to_binary(element(1, Dep)) || Dep <- TestDeps],
-    ProjectApps1 = [rebar_app_info:deps(A, Names) || A <- ProjectApps],
-
-    %% Set deps_dir to a different dir for test deps so they don't collide
-    TestDepsDir = rebar_state:get(State, test_deps_dir, ?DEFAULT_TEST_DEPS_DIR),
-    DepsDir = rebar_state:get(State, deps_dir, ?DEFAULT_DEPS_DIR),
-    State1 = rebar_state:set(State, deps_dir, TestDepsDir),
-    {ok, State2} = rebar_prv_install_deps:handle_deps(State1, TestDeps),
-    AllDeps = rebar_state:get(State2, all_deps, []),
-    State3 = rebar_state:set(State2, deps_dir, DepsDir),
-
-    case rebar_digraph:compile_order(ProjectApps1++AllDeps) of
-        {ok, Sort} ->
-            ToBuild = lists:dropwhile(fun rebar_app_info:valid/1, Sort -- ProjectApps1),
-            State4 = rebar_state:set(State3, deps_to_build, ToBuild),
-            {ok, State4};
-        {error, Error} ->
-            {error, Error}
-    end.
-
--spec format_error(any()) -> iolist().
-format_error(Reason) ->
-    io_lib:format("~p", [Reason]).
-
-%% ===================================================================
-%% Internal functions
-%% ===================================================================
diff --git a/src/rebar_state.erl b/src/rebar_state.erl
index 840b428..7b0ac6a 100644
--- a/src/rebar_state.erl
+++ b/src/rebar_state.erl
@@ -2,9 +2,15 @@
 
 -export([new/0, new/1, new/2, new/3,
          get/2, get/3, set/3,
+
+         current_profile/1,
+         current_profile/2,
+
          command_args/1, command_args/2,
          command_parsed_args/1, command_parsed_args/2,
 
+         apply_profile/2,
+
          dir/1, dir/2,
          create_logic_providers/2,
 
@@ -20,18 +26,20 @@
 
 -include("rebar.hrl").
 
--record(state_t, {dir :: file:name(),
-                  opts = [],
+-record(state_t, {dir                               :: file:name(),
+                  opts                = dict:new()  :: rebar_dict(),
 
-                  command_args = [],
+                  current_profile     = default     :: atom(),
+
+                  command_args        = [],
                   command_parsed_args = [],
 
-                  src_deps = [],
-                  src_apps = [],
-                  pkg_deps = [] :: [rebar_packages:package()],
-                  project_apps = [],
+                  src_deps            = [],
+                  src_apps            = [],
+                  pkg_deps            = []          :: [rebar_packages:package()],
+                  project_apps        = [],
 
-                  providers = []}).
+                  providers           = []}).
 
 -export_type([t/0]).
 
@@ -44,7 +52,7 @@ new() ->
 -spec new(list()) -> t().
 new(Config) when is_list(Config) ->
     #state_t { dir = rebar_utils:get_cwd(),
-               opts = Config }.
+               opts = dict:from_list(Config) }.
 
 -spec new(t(), list()) -> t().
 new(ParentState=#state_t{}, Config) ->
@@ -57,25 +65,39 @@ new(ParentState, Config, Dir) ->
     Opts = ParentState#state_t.opts,
     LocalOpts = case rebar_config:consult_file(?LOCK_FILE) of
                     [D] ->
-                        [{locks, D} | Config];
+                        dict:from_list([{locks, D} | Config]);
                     _ ->
-                        Config
+                        dict:from_list(Config)
                 end,
 
     ProviderModules = [],
-    create_logic_providers(ProviderModules, ParentState#state_t{dir=Dir
-                                                               ,opts=lists:umerge(LocalOpts, Opts)}).
+    create_logic_providers(ProviderModules
+                          ,ParentState#state_t{dir=Dir
+                                              ,opts=dict:merge(fun(_Key, Value1, _Value2) ->
+                                                                       Value1
+                                                               end, LocalOpts, Opts)}).
 
 get(State, Key) ->
-    proplists:get_value(Key, State#state_t.opts).
+    {ok, Value} = dict:find(Key, State#state_t.opts),
+    Value.
 
 get(State, Key, Default) ->
-    proplists:get_value(Key, State#state_t.opts, Default).
+    case dict:find(Key, State#state_t.opts) of
+        {ok, Value} ->
+            Value;
+        error ->
+            Default
+    end.
 
 -spec set(t(), any(), any()) -> t().
-set(State, Key, Value) ->
-    Opts = proplists:delete(Key, State#state_t.opts),
-    State#state_t { opts = [{Key, Value} | Opts] }.
+set(State=#state_t{opts=Opts}, Key, Value) ->
+    State#state_t{ opts = dict:store(Key, Value, Opts) }.
+
+current_profile(#state_t{current_profile=Profile}) ->
+    Profile.
+
+current_profile(State, Profile) ->
+    State#state_t{current_profile=Profile}.
 
 command_args(#state_t{command_args=CmdArgs}) ->
     CmdArgs.
@@ -89,19 +111,45 @@ command_parsed_args(#state_t{command_parsed_args=CmdArgs}) ->
 command_parsed_args(State, CmdArgs) ->
     State#state_t{command_parsed_args=CmdArgs}.
 
+apply_profile(State=#state_t{opts=Opts}, Profile) ->
+    ConfigProfiles = rebar_state:get(State, profiles, []),
+    Deps = rebar_state:get(State, deps, []),
+    Opts1 = dict:store({deps, default}, Deps, dict:erase(deps, Opts)),
+    ProfileOpts = dict:from_list(proplists:get_value(Profile, ConfigProfiles, [])),
+    State#state_t{opts=merge_opts(Profile, ProfileOpts, Opts1)}.
+
+merge_opts(Profile, Opts1, Opts2) ->
+    dict:fold(fun(deps, Value, OptsAcc) ->
+                      dict:store({deps, Profile}, Value, OptsAcc);
+                 (Key, Value, OptsAcc) ->
+                      case dict:fetch(Key, 1, Opts2) of
+                          {_, OldValue} when is_list(OldValue) ->
+                              case io_lib:printable_list(Value) of
+                                  true ->
+                                      dict:store(Key, OptsAcc, {Key, Value});
+                                  false ->
+                                      dict:store(Key, OptsAcc, {Key, lists:keymerge(1, lists:keysort(1, OldValue), lists:keysort(1, Value))})
+                              end;
+                          error ->
+                              dict:store(Key, Value, OptsAcc)
+                      end
+              end, Opts2, Opts1).
+
 dir(#state_t{dir=Dir}) ->
     Dir.
 
 dir(State=#state_t{}, Dir) ->
     State#state_t{dir=filename:absname(Dir)}.
 
-deps_names(State) ->
-    Deps = rebar_state:get(State, deps, []),
+deps_names(Deps) when is_list(Deps) ->
     lists:map(fun(Dep) when is_tuple(Dep) ->
                       ec_cnv:to_binary(element(1, Dep));
                  (Dep) when is_atom(Dep) ->
                       ec_cnv:to_binary(Dep)
-              end, Deps).
+              end, Deps);
+deps_names(State) ->
+    Deps = rebar_state:get(State, deps, []),
+    deps_names(Deps).
 
 -spec pkg_deps(t()) -> [rebar_packages:package()].
 pkg_deps(#state_t{pkg_deps=PkgDeps}) ->
@@ -138,7 +186,7 @@ project_apps(#state_t{project_apps=Apps}) ->
 project_apps(State=#state_t{}, NewApps) when is_list(NewApps) ->
     State#state_t{project_apps=NewApps};
 project_apps(State=#state_t{project_apps=Apps}, App) ->
-    State#state_t{project_apps=[App | Apps]}.
+    State#state_t{project_apps=lists:keystore(rebar_app_info:name(App), 2, Apps, App)}.
 
 providers(#state_t{providers=Providers}) ->
     Providers.
diff --git a/src/rebar_utils.erl b/src/rebar_utils.erl
index 9a0e1d9..d28d761 100644
--- a/src/rebar_utils.erl
+++ b/src/rebar_utils.erl
@@ -26,7 +26,17 @@
 %% -------------------------------------------------------------------
 -module(rebar_utils).
 
--export([home_dir/0,
+-export([base_dir/1,
+         deps_dir/1,
+         deps_dir/2,
+         plugins_dir/1,
+         lib_dirs/1,
+         profile_dir/1,
+         default_deps_dir/1,
+         default_profile_dir/1,
+         default_profile_deps/1,
+         home_dir/0,
+
          droplast/1,
          filtermap/2,
          get_cwd/0,
@@ -68,6 +78,45 @@
 %% Public API
 %% ====================================================================
 
+-spec base_dir(rebar_state:t()) -> file:filename_all().
+base_dir(State) ->
+    rebar_state:get(State, base_dir, ?DEFAULT_BASE_DIR).
+
+-spec deps_dir(rebar_state:t()) -> file:filename_all().
+deps_dir(State) ->
+    DepsDir = rebar_state:get(State, deps_dir, ?DEFAULT_DEPS_DIR),
+    filename:join(profile_dir(State), DepsDir).
+
+-spec deps_dir(file:filename_all(), file:filename_all()) -> file:filename_all().
+deps_dir(DepsDir, App) ->
+    filename:join(DepsDir, App).
+
+-spec default_deps_dir(rebar_state:t()) -> file:filename_all().
+default_deps_dir(State) ->
+    DepsDir = rebar_state:get(State, deps_dir, ?DEFAULT_DEPS_DIR),
+    filename:join([base_dir(State), "default", DepsDir]).
+
+-spec plugins_dir(rebar_state:t()) -> file:filename_all().
+plugins_dir(State) ->
+    filename:join(base_dir(State), rebar_state:get(State, plugins_dir, ?DEFAULT_PLUGINS_DIR)).
+
+-spec lib_dirs(rebar_state:t()) -> file:filename_all().
+lib_dirs(State) ->
+    rebar_state:get(State, lib_dirs, ?DEFAULT_LIB_DIRS).
+
+-spec default_profile_dir(rebar_state:t()) -> file:filename_all().
+default_profile_dir(State) ->
+    filename:join(base_dir(State), "default").
+
+-spec profile_dir(rebar_state:t()) -> file:filename_all().
+profile_dir(State) ->
+    Profile = rebar_state:current_profile(State),
+    filename:join(base_dir(State), atom_to_list(Profile)).
+
+-spec default_profile_deps(rebar_state:t()) -> file:filename_all().
+default_profile_deps(State) ->
+    filename:join(default_profile_dir(State), ?DEFAULT_DEPS_DIR).
+
 home_dir() ->
     {ok, [[Home]]} = init:get_argument(home),
     Home.