[#60] Add support for erlang_ls.config file

README.md

@@ -98,6 +98,24 @@ Code completion is available for the following elements:
 * Atom names
 * Module attributes
 
+## Customization
+
+It is possible to customize the behaviour of the `erlang_ls` server by
+adding a `erlang_ls.config` file to the root of your projects.
+
+A sample `erlang_ls.config` file would look like the following:
+
+    otp_path: "/path/to/otp/lib/erlang"
+    deps_dirs:
+      - "lib/*"
+
+Currently, the following customizations are possible:
+
+| Parameter  | Description                                                         |
+|------------|---------------------------------------------------------------------|
+| otp\_path  | Path to the OTP installation                                        |
+| deps\_dirs | List of directories containing dependencies. It supports wildcards. |
+
 ## Troubleshooting
 
 It is possible to compile and start the language server in _debug mode_:

include/erlang_ls.hrl

@@ -71,12 +71,6 @@
 %% Language Server Protocol
 %%==============================================================================
 
-%%------------------------------------------------------------------------------
-%% URI
-%%------------------------------------------------------------------------------
--type uri() :: binary().
--type uri_path() :: binary().
-
 %%------------------------------------------------------------------------------
 %% Position
 %%------------------------------------------------------------------------------
@@ -156,12 +150,12 @@
 %%------------------------------------------------------------------------------
 %% Text Document Identifier
 %%------------------------------------------------------------------------------
--type text_document_id() :: #{ uri := uri() }.
+-type text_document_id() :: #{ uri := erlang_ls_uri:uri() }.
 
 %%------------------------------------------------------------------------------
 %% Text Document Item
 %%------------------------------------------------------------------------------
--type text_document_item() :: #{ uri        := uri()
+-type text_document_item() :: #{ uri        := erlang_ls_uri:uri()
                                , languageId := binary()
                                , version    := number()
                                , text       := binary()
@@ -210,7 +204,7 @@
 %%------------------------------------------------------------------------------
 %% Initialize Request
 %%------------------------------------------------------------------------------
--type workspace_folder() :: #{ uri  => uri()
+-type workspace_folder() :: #{ uri  => erlang_ls_uri:uri()
                              , name => binary()
                              }.
 
@@ -225,7 +219,7 @@
 
 -type initialize_params() :: #{ processId             := number() | null
                               , rootPath              => binary() | null
-                              , rootUri               := uri() | null
+                              , rootUri               := erlang_ls_uri:uri() | null
                               , initializationOptions => any()
                               , capabilities          := client_capabilities()
                               , trace                 => off

rebar.config

@@ -12,6 +12,7 @@
        , {cowlib, "2.3.0"}
        , {redbug, "1.2.1"}
        , {lager,  "3.6.8"}
+       , {yamerl, "0.7.0"}
        ]
 }.
 

rebar.lock

@@ -4,13 +4,15 @@
  {<<"jsx">>,{pkg,<<"jsx">>,<<"2.9.0">>},0},
  {<<"lager">>,{pkg,<<"lager">>,<<"3.6.8">>},0},
  {<<"ranch">>,{pkg,<<"ranch">>,<<"1.5.0">>},0},
- {<<"redbug">>,{pkg,<<"redbug">>,<<"1.2.1">>},0}]}.
+ {<<"redbug">>,{pkg,<<"redbug">>,<<"1.2.1">>},0},
+ {<<"yamerl">>,{pkg,<<"yamerl">>,<<"0.7.0">>},0}]}.
 [
 {pkg_hash,[
  {<<"cowlib">>, <<"BBD58EF537904E4F7C1DD62E6AA8BC831C8183CE4EFA9BD1150164FE15BE4CAA">>},
  {<<"goldrush">>, <<"F06E5D5F1277DA5C413E84D5A2924174182FB108DABB39D5EC548B27424CD106">>},
  {<<"jsx">>, <<"D2F6E5F069C00266CAD52FB15D87C428579EA4D7D73A33669E12679E203329DD">>},
  {<<"lager">>, <<"897EFC7679BB82383448646C96768CDC4E747464DD18B999C7AACA485686B0DA">>},
  {<<"ranch">>, <<"F04166F456790FEE2AC1AA05A02745CC75783C2BFB26D39FAF6AEFC9A3D3A58A">>},
- {<<"redbug">>, <<"9153EE50E42C39CE3F6EFA65EE746F4A52896DA66862CFB59E7C0F838B7B8414">>}]}
+ {<<"redbug">>, <<"9153EE50E42C39CE3F6EFA65EE746F4A52896DA66862CFB59E7C0F838B7B8414">>},
+ {<<"yamerl">>, <<"E51DBA652DCE74C20A88294130B48051EBBBB0BE7D76F22DE064F0F3CCF0AAF5">>}]}
 ].

src/erlang_ls.app.src

@@ -11,6 +11,7 @@
    , jsx
    , cowlib
    , lager
+   , yamerl
    ]},
   {env,[]},
   {modules, []},

src/erlang_ls_buffer_server.erl

@@ -15,8 +15,12 @@
 -export([ start_link/0
         , add_buffer/2
         , get_buffer/1
+        , get_deps_dirs/0
+        , get_otp_path/0
         , get_root_uri/0
         , remove_buffer/1
+        , set_deps_dirs/1
+        , set_otp_path/1
         , set_root_uri/1
         , stop/0
         ]).
@@ -43,13 +47,18 @@
 %%==============================================================================
 %% Record Definitions
 %%==============================================================================
--record(state, { buffers, root_uri }).
+-record(state, { buffers
+               , deps_dirs = []
+               , root_uri
+               , otp_path
+               }).
 
 %%==============================================================================
 %% Type Definitions
 %%==============================================================================
 -type state()  :: #state{}.
 -type buffer() :: pid().
+-type path()   :: file:filename().
 
 %%%=============================================================================
 %%% API
@@ -58,23 +67,39 @@
 start_link() ->
   gen_server:start_link({local, ?SERVER}, ?MODULE, {}, []).
 
--spec add_buffer(uri(), buffer()) -> ok.
+-spec add_buffer(erlang_ls_uri:uri(), buffer()) -> ok.
 add_buffer(Uri, Buffer) ->
   gen_server:call(?SERVER, {add_buffer, Uri, Buffer}).
 
--spec get_buffer(uri()) -> {ok, buffer() | undefined}.
+-spec get_buffer(erlang_ls_uri:uri()) -> {ok, buffer() | undefined}.
 get_buffer(Uri) ->
   gen_server:call(?SERVER, {get_buffer, Uri}).
 
--spec get_root_uri() -> {ok, uri() | undefined}.
+-spec get_deps_dirs() -> {ok, [path()]}.
+get_deps_dirs() ->
+  gen_server:call(?SERVER, {get_deps_dirs}).
+
+-spec get_otp_path() -> {ok, path() | undefined}.
+get_otp_path() ->
+  gen_server:call(?SERVER, {get_otp_path}).
+
+-spec get_root_uri() -> {ok, erlang_ls_uri:uri() | undefined}.
 get_root_uri() ->
   gen_server:call(?SERVER, {get_root_uri}).
 
--spec remove_buffer(uri()) -> ok.
+-spec remove_buffer(erlang_ls_uri:uri()) -> ok.
 remove_buffer(Uri) ->
   gen_server:call(?SERVER, {remove_buffer, Uri}).
 
--spec set_root_uri(uri()) -> ok.
+-spec set_deps_dirs([erlang_ls_uri:path()]) -> ok.
+set_deps_dirs(DepsDirs) ->
+  gen_server:call(?SERVER, {set_deps_dirs, DepsDirs}).
+
+-spec set_otp_path(erlang_ls_uri:uri()) -> ok.
+set_otp_path(Uri) ->
+  gen_server:call(?SERVER, {set_otp_path, Uri}).
+
+-spec set_root_uri(erlang_ls_uri:uri()) -> ok.
 set_root_uri(Uri) ->
   gen_server:call(?SERVER, {set_root_uri, Uri}).
 
@@ -95,12 +120,22 @@ handle_call({add_buffer, Uri, Buffer}, _From, State) ->
 handle_call({get_buffer, Uri}, _From, State) ->
   Buffer = proplists:get_value(Uri, State#state.buffers),
   {reply, {ok, Buffer}, State};
+handle_call({get_deps_dirs}, _From, State) ->
+  DepsDirs = State#state.deps_dirs,
+  {reply, {ok, DepsDirs}, State};
+handle_call({get_otp_path}, _From, State) ->
+  OtpPath = State#state.otp_path,
+  {reply, {ok, OtpPath}, State};
 handle_call({get_root_uri}, _From, State) ->
   RootUri = State#state.root_uri,
   {reply, {ok, RootUri}, State};
 handle_call({remove_buffer, Uri}, _From, State) ->
   Buffers = proplists:delete(Uri, State#state.buffers),
   {reply, ok, State#state{buffers = Buffers}};
+handle_call({set_deps_dirs, DepsDirs}, _From, State) ->
+  {reply, ok, State#state{deps_dirs = DepsDirs}};
+handle_call({set_otp_path, Path}, _From, State) ->
+  {reply, ok, State#state{otp_path = Path}};
 handle_call({set_root_uri, Uri}, _From, State) ->
   {reply, ok, State#state{root_uri = Uri}}.
 

src/erlang_ls_client.erl

@@ -15,7 +15,7 @@
 -export([ did_open/4
         , did_save/1
         , did_close/1
-        , initialize/1
+        , initialize/2
         , start_link/2
         , stop/0
         ]).
@@ -51,28 +51,29 @@
 %%==============================================================================
 %% Type Definitions
 %%==============================================================================
--type state()    :: #state{}.
--type hostname() :: tuple().
--type port_no()  :: pos_integer().
+-type state()        :: #state{}.
+-type hostname()     :: tuple().
+-type port_no()      :: pos_integer().
+-type init_options() :: [].
 
 %%==============================================================================
 %% API
 %%==============================================================================
--spec did_open(uri(), binary(), number(), binary()) -> ok.
+-spec did_open(erlang_ls_uri:uri(), binary(), number(), binary()) -> ok.
 did_open(Uri, LanguageId, Version, Text) ->
   gen_server:call(?SERVER, {did_open, Uri, LanguageId, Version, Text}).
 
--spec did_save(uri()) -> ok.
+-spec did_save(erlang_ls_uri:uri()) -> ok.
 did_save(Uri) ->
   gen_server:call(?SERVER, {did_save, Uri}).
 
--spec did_close(uri()) -> ok.
+-spec did_close(erlang_ls_uri:uri()) -> ok.
 did_close(Uri) ->
   gen_server:call(?SERVER, {did_close, Uri}).
 
--spec initialize(uri()) -> ok.
-initialize(RootUri) ->
-  gen_server:call(?SERVER, {initialize, RootUri}).
+-spec initialize(erlang_ls_uri:uri(), init_options()) -> ok.
+initialize(RootUri, InitOptions) ->
+  gen_server:call(?SERVER, {initialize, RootUri, InitOptions}).
 
 -spec start_link(hostname(), port_no()) -> {ok, pid()}.
 start_link(Host, Port) ->
@@ -117,11 +118,14 @@ handle_call({did_close, Uri}, _From, State) ->
   Content = erlang_ls_protocol:notification(Method, Params),
   ok = gen_tcp:send(State#state.socket, Content),
   {reply, ok, State};
-handle_call({initialize, RootUri}, From, #state{ request_id = RequestId
-                                               , socket     = Socket
-                                               } = State) ->
+handle_call({initialize, RootUri, InitOptions}, From, State) ->
+  #state{ request_id = RequestId
+        , socket     = Socket
+        } = State,
   Method  = <<"initialize">>,
-  Params  = #{ <<"rootUri">> => RootUri },
+  Params  = #{ <<"rootUri">> => RootUri
+             , <<"initializationOptions">> => InitOptions
+             },
   Content = erlang_ls_protocol:request(RequestId, Method, Params),
   gen_tcp:send(Socket, Content),
   {noreply, State#state{ request_id = RequestId + 1

src/erlang_ls_code_navigation.erl

@@ -8,12 +8,7 @@
 %%==============================================================================
 
 %% API
--export([ goto_definition/2
-        , goto_definition/3
-        ]).
-
--export([ otp_path/0
-        ]).
+-export([ goto_definition/2 ]).
 
 %%==============================================================================
 %% Includes
@@ -27,7 +22,7 @@
 -spec goto_definition(binary(), erlang_ls_poi:poi()) ->
    {ok, binary(), erlang_ls_poi:range()} | {error, any()}.
 goto_definition(Filename, POI) ->
-  goto_definition(Filename, POI, full_path()).
+  goto_definition(Filename, POI, include_path()).
 
 %% TODO: Abstract pattern
 -spec goto_definition(binary(), erlang_ls_poi:poi(), [string()]) ->
@@ -125,7 +120,7 @@ definition({type_application, {Type, _}}) ->
 
 -spec otp_path() -> [string()].
 otp_path() ->
-  Root = code:root_dir(),
+  {ok, Root} = erlang_ls_buffer_server:get_otp_path(),
   Sources = filename:join([Root, "lib", "*", "src"]),
   Includes = filename:join([Root, "lib", "*", "include"]),
   lists:append([ filelib:wildcard(Sources)
@@ -140,9 +135,24 @@ app_path() ->
   , filename:join([RootPath, "include"])
   ].
 
--spec full_path() -> [string()].
-full_path() ->
-  lists:append( [ app_path(), otp_path() ]).
+-spec deps_path() -> [string()].
+deps_path() ->
+  {ok, RootUri} = erlang_ls_buffer_server:get_root_uri(),
+  RootPath = binary_to_list(erlang_ls_uri:path(RootUri)),
+  {ok, Dirs} = erlang_ls_buffer_server:get_deps_dirs(),
+  lists:foldl(fun(Dir, Acc) ->
+                  Sources  = filename:join([RootPath, Dir, "src"]),
+                  Includes = filename:join([RootPath, Dir, "include"]),
+                  lists:append([ filelib:wildcard(Sources)
+                               , filelib:wildcard(Includes)
+                               , Acc
+                               ])
+              end
+             , [], Dirs).
+
+-spec include_path() -> [string()].
+include_path() ->
+  lists:append( [ app_path(), otp_path(), deps_path() ]).
 
 %% Look for a definition recursively in a file and its includes.
 -spec search(binary(), [string()], any()) ->

src/erlang_ls_compiler_diagnostics.erl

@@ -32,7 +32,7 @@
 %%==============================================================================
 %% Callback Functions
 %%==============================================================================
--spec diagnostics(uri()) -> [diagnostic()].
+-spec diagnostics(erlang_ls_uri:uri()) -> [diagnostic()].
 diagnostics(Uri) ->
   Path = erlang_ls_uri:path(Uri),
   case compile:file(binary_to_list(Path), ?COMPILER_OPTS) of

src/erlang_ls_diagnostics.erl

@@ -11,4 +11,4 @@
 %%==============================================================================
 %% Callback Functions Definitions
 %%==============================================================================
--callback diagnostics(uri()) -> [diagnostic()].
+-callback diagnostics(erlang_ls_uri:uri()) -> [diagnostic()].

src/erlang_ls_dialyzer_diagnostics.erl

@@ -21,7 +21,7 @@
 %%==============================================================================
 %% Callback Functions
 %%==============================================================================
--spec diagnostics(uri()) -> [diagnostic()].
+-spec diagnostics(erlang_ls_uri:uri()) -> [diagnostic()].
 diagnostics(Uri) ->
   Path = erlang_ls_uri:path(Uri),
   WS = try dialyzer:run([{files, [binary_to_list(Path)]}, {from, src_code}])