Basic file rename from rcl to rlx

1 files changed, 186 insertions, 0 deletions

diff --git a/src/rlx_prv_config.erl b/src/rlx_prv_config.erl
new file mode 100644
index 0000000..2bc9851
--- /dev/null
+++ b/src/rlx_prv_config.erl
@@ -0,0 +1,186 @@
+%% -*- erlang-indent-level: 4; indent-tabs-mode: nil; fill-column: 80 -*-
+%%% Copyright 2012 Erlware, LLC. All Rights Reserved.
+%%%
+%%% This file is provided to you under the Apache License,
+%%% Version 2.0 (the "License"); you may not use this file
+%%% except in compliance with the License.  You may obtain
+%%% a copy of the License at
+%%%
+%%%   http://www.apache.org/licenses/LICENSE-2.0
+%%%
+%%% Unless required by applicable law or agreed to in writing,
+%%% software distributed under the License is distributed on an
+%%% "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+%%% KIND, either express or implied.  See the License for the
+%%% specific language governing permissions and limitations
+%%% under the License.
+%%%-------------------------------------------------------------------
+%%% @author Eric Merritt <[email protected]>
+%%% @copyright 2011 Erlware, LLC.
+%%% @doc
+%%%  A module that provides config parsing and support to the system
+%%% @end
+%%%-------------------------------------------------------------------
+-module(rcl_prv_config).
+
+-behaviour(rcl_provider).
+
+%% API
+-export([init/1,
+         do/1,
+         format_error/1]).
+
+-include_lib("relcool/include/relcool.hrl").
+
+%%%===================================================================
+%%% API
+%%%===================================================================
+
+%% @doc Required by the system, but not used in this provider
+-spec init(rcl_state:t()) -> {ok, rcl_state:t()} | relcool:error().
+init(State) ->
+    {ok, State}.
+
+%% @doc parse all the configs currently specified in the state,
+%% populating the state as a result.
+-spec do(rcl_state:t()) ->{ok,  rcl_state:t()} | relcool:error().
+do(State) ->
+    case rcl_state:config_file(State) of
+        [] ->
+            search_for_dominating_config(State);
+        undefined ->
+            search_for_dominating_config(State);
+        ConfigFile when erlang:is_list(ConfigFile) ->
+            load_config(ConfigFile, State)
+    end.
+
+-spec format_error(Reason::term()) -> iolist().
+format_error({consult, ConfigFile, Reason}) ->
+    io_lib:format("Unable to read file ~s: ~s", [ConfigFile,
+                                                 file:format_error(Reason)]);
+format_error({invalid_term, Term}) ->
+    io_lib:format("Invalid term in config file: ~p", [Term]).
+
+%%%===================================================================
+%%% Internal Functions
+%%%===================================================================
+search_for_dominating_config({ok, Cwd}) ->
+    ConfigFile = filename:join(Cwd, "relcool.config"),
+    case ec_file:exists(ConfigFile) of
+        true ->
+            {ok, ConfigFile};
+        false ->
+            search_for_dominating_config(parent_dir(Cwd))
+    end;
+search_for_dominating_config({error, _}) ->
+    no_config;
+search_for_dominating_config(State0) ->
+    {ok, Cwd} = file:get_cwd(),
+    case search_for_dominating_config({ok, Cwd}) of
+        {ok, Config} ->
+            %% we need to set the root dir on state as well
+            {ok, RootDir} = parent_dir(Config),
+            State1 = rcl_state:root_dir(State0, RootDir),
+            load_config(Config, rcl_state:config_file(State1, Config));
+        no_config ->
+            {ok, State0}
+    end.
+
+%% @doc Given a directory returns the name of the parent directory.
+-spec parent_dir(Filename::string()) ->
+                        {ok, DirName::string()} | {error, no_parent_dir}.
+parent_dir(Filename) ->
+    parent_dir(filename:split(Filename), []).
+
+%% @doc Given list of directories, splits the list and returns all dirs but the
+%%  last as a path.
+-spec parent_dir([string()], [string()]) ->
+                        {ok, DirName::string()} | {error, no_parent_dir}.
+parent_dir([_H], []) ->
+    {error, no_parent_dir};
+parent_dir([], []) ->
+    {error, no_parent_dir};
+parent_dir([_H], Acc) ->
+    {ok, filename:join(lists:reverse(Acc))};
+parent_dir([H | T], Acc) ->
+    parent_dir(T, [H | Acc]).
+
+
+-spec load_config(file:filename(), rcl_state:t()) ->
+                         {ok, rcl_state:t()} | relcool:error().
+load_config(ConfigFile, State) ->
+    {ok, CurrentCwd} = file:get_cwd(),
+    ok = file:set_cwd(filename:dirname(ConfigFile)),
+    Result = case file:consult(ConfigFile) of
+                 {error, Reason} ->
+                     ?RCL_ERROR({consult, ConfigFile, Reason});
+                 {ok, Terms} ->
+                     lists:foldl(fun load_terms/2, {ok, State}, Terms)
+             end,
+    ok = file:set_cwd(CurrentCwd),
+    Result.
+
+-spec load_terms(term(), {ok, rcl_state:t()} | relcool:error()) ->
+                        {ok, rcl_state:t()} | relcool:error().
+load_terms({default_release, RelName, RelVsn}, {ok, State}) ->
+    {ok, rcl_state:default_configured_release(State, RelName, RelVsn)};
+load_terms({paths, Paths}, {ok, State}) ->
+    code:add_pathsa([filename:absname(Path) || Path <- Paths]),
+    {ok, State};
+load_terms({providers, Providers0}, {ok, State0}) ->
+    Providers1 = gen_providers(Providers0, State0),
+    case Providers1 of
+        {_, E={error, _}} ->
+            E;
+        {Providers3, {ok, State3}} ->
+            {ok, rcl_state:providers(State3, Providers3)}
+    end;
+load_terms({add_providers, Providers0}, {ok, State0}) ->
+    Providers1 = gen_providers(Providers0, State0),
+    case Providers1 of
+        {_, E={error, _}} ->
+            E;
+        {Providers3, {ok, State1}} ->
+            ExistingProviders = rcl_state:providers(State1),
+            {ok, rcl_state:providers(State1, ExistingProviders ++ Providers3)}
+    end;
+load_terms({skip_apps, SkipApps0}, {ok, State0}) ->
+    {ok, rcl_state:skip_apps(State0, SkipApps0)};
+load_terms({overrides, Overrides0}, {ok, State0}) ->
+    {ok, rcl_state:overrides(State0, Overrides0)};
+load_terms({release, {RelName, Vsn}, Applications}, {ok, State0}) ->
+    Release0 = rcl_release:new(RelName, Vsn),
+    case rcl_release:goals(Release0, Applications) of
+        E={error, _} ->
+            E;
+        {ok, Release1} ->
+            {ok, rcl_state:add_configured_release(State0, Release1)}
+        end;
+load_terms({release, {RelName, Vsn}, {erts, ErtsVsn},
+            Applications}, {ok, State}) ->
+    Release0 = rcl_release:erts(rcl_release:new(RelName, Vsn), ErtsVsn),
+    case rcl_release:goals(Release0, Applications) of
+        E={error, _} ->
+            E;
+        {ok, Release1} ->
+            {ok, rcl_state:add_configured_release(State, Release1)}
+    end;
+load_terms({sys_config, SysConfig}, {ok, State}) ->
+    {ok, rcl_state:sys_config(State, filename:absname(SysConfig))};
+load_terms({Name, Value}, {ok, State})
+  when erlang:is_atom(Name) ->
+    {ok, rcl_state:put(State, Name, Value)};
+load_terms(_, Error={error, _}) ->
+    Error;
+load_terms(InvalidTerm, _) ->
+    ?RCL_ERROR({invalid_term, InvalidTerm}).
+
+-spec gen_providers([module()], rcl_state:t()) ->
+                           {[rcl_provider:t()], {ok, rcl_state:t()} | relcool:error()}.
+gen_providers(Providers, State) ->
+    lists:foldl(fun(ProviderName, {Providers1, {ok, State1}}) ->
+                        {Provider, State2} = rcl_provider:new(ProviderName, State1),
+                        {[Provider | Providers1], State2};
+                   (_, E={_, {error, _}}) ->
+                        E
+                end, {[], {ok, State}}, Providers).