Merge pull request #298 from talentdeficit/cover_paths

cover enhancements

src/rebar_prv_cover.erl

@@ -14,7 +14,7 @@
 -include("rebar.hrl").
 
 -define(PROVIDER, cover).
--define(DEPS, []).
+-define(DEPS, [app_discovery]).
 
 %% ===================================================================
 %% Public API
@@ -29,7 +29,8 @@ init(State) ->
                                                                {example, "rebar3 cover"},
                                                                {short_desc, "Perform coverage analysis."},
                                                                {desc, ""},
-                                                               {opts, cover_opts(State)}])),
+                                                               {opts, cover_opts(State)},
+                                                               {profiles, [test]}])),
     {ok, State1}.
 
 -spec do(rebar_state:t()) -> {ok, rebar_state:t()} | {error, string()}.
@@ -135,14 +136,25 @@ import(CoverData) ->
     end.
 
 analysis(State, Task) ->
+    OldPath = code:get_path(),
+    ok = restore_cover_paths(State),
     Mods = cover:imported_modules(),
-    lists:map(
-        fun(Mod) ->
-            {ok, Answer} = cover:analyze(Mod, coverage, line),
-            {ok, File} = analyze_to_file(Mod, State, Task),
-            {Mod, process(Answer), File}
-        end,
-        Mods).
+    Analysis = lists:map(fun(Mod) ->
+                  {ok, Answer} = cover:analyze(Mod, coverage, line),
+                  {ok, File} = analyze_to_file(Mod, State, Task),
+                  {Mod, process(Answer), File}
+              end,
+              Mods),
+    true = code:set_path(OldPath),
+    Analysis.
+
+restore_cover_paths(State) ->
+    lists:foreach(fun(App) ->
+        AppDir = rebar_app_info:out_dir(App),
+        _ = code:add_path(filename:join([AppDir, "ebin"]))
+    end, rebar_state:project_apps(State)),
+    _ = code:add_path(filename:join([rebar_dir:base_dir(State), "ebin"])),
+    ok.
 
 analyze_to_file(Mod, State, Task) ->
     CoverDir = cover_dir(State),
@@ -319,8 +331,7 @@ write_coverdata(State, Task) ->
     ExportFile = filename:join([DataDir, atom_to_list(Task) ++ ".coverdata"]),
     case cover:export(ExportFile) of
         ok ->
-            ?DEBUG("Cover data written to ~p.", [ExportFile]),
-            ok;
+            ?DEBUG("Cover data written to ~p.", [ExportFile]);
         {error, Reason} ->
             ?WARN("Cover data export failed: ~p", [Reason])
     end.
@@ -333,7 +344,8 @@ verbose(State) ->
     end.
 
 cover_dir(State) ->
-    rebar_state:get(State, cover_data_dir, filename:join(["_build", "cover"])).
+    rebar_state:get(State, cover_data_dir, filename:join([rebar_dir:base_dir(State),
+                                                          "cover"])).
 
 cover_opts(_State) ->
     [{reset, $r, "reset", boolean, help(reset)},

test/rebar_cover_SUITE.erl

@@ -39,7 +39,7 @@ flag_coverdata_written(Config) ->
 
     Name = rebar_test_utils:create_random_name("cover_"),
     Vsn = rebar_test_utils:create_random_vsn(),
-    rebar_test_utils:create_app(AppDir, Name, Vsn, [kernel, stdlib]),
+    rebar_test_utils:create_eunit_app(AppDir, Name, Vsn, [kernel, stdlib]),
 
     RebarConfig = [{erl_opts, [{d, some_define}]}],
     rebar_test_utils:run_and_check(Config,
@@ -47,14 +47,14 @@ flag_coverdata_written(Config) ->
                                    ["eunit", "--cover"],
                                    {ok, [{app, Name}]}),
 
-    true = filelib:is_file(filename:join(["_build", "cover", "eunit.coverdata"])).
+    true = filelib:is_file(filename:join([AppDir, "_build", "test", "cover", "eunit.coverdata"])).
 
 config_coverdata_written(Config) ->
     AppDir = ?config(apps, Config),
 
     Name = rebar_test_utils:create_random_name("cover_"),
     Vsn = rebar_test_utils:create_random_vsn(),
-    rebar_test_utils:create_app(AppDir, Name, Vsn, [kernel, stdlib]),
+    rebar_test_utils:create_eunit_app(AppDir, Name, Vsn, [kernel, stdlib]),
 
     RebarConfig = [{erl_opts, [{d, some_define}]}, {cover_enabled, true}],
     rebar_test_utils:run_and_check(Config,
@@ -62,14 +62,14 @@ config_coverdata_written(Config) ->
                                    ["eunit"],
                                    {ok, [{app, Name}]}),
 
-    true = filelib:is_file(filename:join(["_build", "cover", "eunit.coverdata"])).
+    true = filelib:is_file(filename:join([AppDir, "_build", "test", "cover", "eunit.coverdata"])).
 
 index_written(Config) ->
     AppDir = ?config(apps, Config),
 
     Name = rebar_test_utils:create_random_name("cover_"),
     Vsn = rebar_test_utils:create_random_vsn(),
-    rebar_test_utils:create_app(AppDir, Name, Vsn, [kernel, stdlib]),
+    rebar_test_utils:create_eunit_app(AppDir, Name, Vsn, [kernel, stdlib]),
 
     RebarConfig = [{erl_opts, [{d, some_define}]}],
     rebar_test_utils:run_and_check(Config,
@@ -77,14 +77,14 @@ index_written(Config) ->
                                    ["do", "eunit", "--cover", ",", "cover"],
                                    {ok, [{app, Name}]}),
 
-    true = filelib:is_file(filename:join(["_build", "cover", "index.html"])).
+    true = filelib:is_file(filename:join([AppDir, "_build", "test", "cover", "index.html"])).
 
 config_alt_coverdir(Config) ->
     AppDir = ?config(apps, Config),
 
     Name = rebar_test_utils:create_random_name("cover_"),
     Vsn = rebar_test_utils:create_random_vsn(),
-    rebar_test_utils:create_app(AppDir, Name, Vsn, [kernel, stdlib]),
+    rebar_test_utils:create_eunit_app(AppDir, Name, Vsn, [kernel, stdlib]),
 
     CoverDir = filename:join(["coverage", "goes", "here"]),
 
@@ -101,7 +101,7 @@ flag_verbose(Config) ->
 
     Name = rebar_test_utils:create_random_name("cover_"),
     Vsn = rebar_test_utils:create_random_vsn(),
-    rebar_test_utils:create_app(AppDir, Name, Vsn, [kernel, stdlib]),
+    rebar_test_utils:create_eunit_app(AppDir, Name, Vsn, [kernel, stdlib]),
 
     RebarConfig = [{erl_opts, [{d, some_define}]}],
     rebar_test_utils:run_and_check(Config,
@@ -109,14 +109,14 @@ flag_verbose(Config) ->
                                    ["do", "eunit", "--cover", ",", "cover", "--verbose"],
                                    {ok, [{app, Name}]}),
 
-    true = filelib:is_file(filename:join(["_build", "cover", "index.html"])).
+    true = filelib:is_file(filename:join([AppDir, "_build", "test", "cover", "index.html"])).
 
 config_verbose(Config) ->
     AppDir = ?config(apps, Config),
 
     Name = rebar_test_utils:create_random_name("cover_"),
     Vsn = rebar_test_utils:create_random_vsn(),
-    rebar_test_utils:create_app(AppDir, Name, Vsn, [kernel, stdlib]),
+    rebar_test_utils:create_eunit_app(AppDir, Name, Vsn, [kernel, stdlib]),
 
     RebarConfig = [{erl_opts, [{d, some_define}]}, {cover_print_enabled, true}],
     rebar_test_utils:run_and_check(Config,
@@ -124,4 +124,4 @@ config_verbose(Config) ->
                                    ["do", "eunit", "--cover", ",", "cover"],
                                    {ok, [{app, Name}]}),
 
-    true = filelib:is_file(filename:join(["_build", "cover", "index.html"])).
+    true = filelib:is_file(filename:join([AppDir, "_build", "test", "cover", "index.html"])).