Merge branch 'siri/cover-tests'

* siri/cover-tests: (21 commits)
  [common_test] Extend timer for flushing error logger
  [cover] Allow reconnection if node has been disconnected or down
  [cover] Don't kill remote nodes when connection to main node is lost
  [test_server] Add option {start_cover,false} to test_server:start_node
  Use code:lib_dir instead of code:which to get application directory
  [common_test] Add test for OTP-9956
  Include all kernel modules in code coverage analysis
  [common_test] Add test suite for code coverage support
  [common_test, test_server] Don't flush cover if cover is not running
  [common_test] Add option cover_stop
  [test_server] Allow cross cover analysis when testing through common_test
  [test_server] Start cover in test_server:wait_for_node
  [test_server] Multiply timers with timetrap_scale_factor when starting nodes
  Include all stdlib modules in code coverage analysis
  [test_server] Include all test_server modules in code coverage analysis
  Skip epp_SUITE:otp_8911 if cover is running
  [common_test] Start cover on slave nodes if running cover tests
  [common_test] Don't stop cover before stopping slave node
  [test_server] Don't stop cover after test is finished
  [cover] Add support for test_server
  ...

OTP-10427

1 files changed, 54 insertions, 2 deletions

diff --git a/lib/test_server/src/ts.erl b/lib/test_server/src/ts.erl
index db16b6ecd2..1b2bd4296a 100644
--- a/lib/test_server/src/ts.erl
+++ b/lib/test_server/src/ts.erl
@@ -498,8 +498,60 @@ estone(Opts) when is_list(Opts) -> run(emulator,estone_SUITE,Opts).
 cross_cover_analyse([Level]) ->
     cross_cover_analyse(Level);
 cross_cover_analyse(Level) ->
-    test_server_ctrl:cross_cover_analyse(Level).
-
+    Apps = get_last_app_tests(),
+    Modules = get_cross_modules(Apps,[]),
+    test_server_ctrl:cross_cover_analyse(Level,Apps,Modules).
+
+get_last_app_tests() ->
+    AllTests = filelib:wildcard(filename:join(["*","*_test.logs"])),
+    {ok,RE} = re:compile("^[^/]*/[^\.]*\.(.*)_test\.logs$"),
+    get_last_app_tests(AllTests,RE,[]).
+
+get_last_app_tests([Dir|Dirs],RE,Acc) ->
+    NewAcc =
+	case re:run(Dir,RE,[{capture,all,list}]) of
+	    {match,[Dir,AppStr]} ->
+		App = list_to_atom(AppStr),
+		case lists:keytake(App,1,Acc) of
+		    {value,{App,LastDir},Rest} ->
+			if Dir > LastDir ->
+				[{App,Dir}|Rest];
+			   true ->
+				Acc
+			end;
+		    false ->
+			[{App,Dir} | Acc]
+		end;
+	    _ ->
+		Acc
+	end,
+    get_last_app_tests(Dirs,RE,NewAcc);
+get_last_app_tests([],_,Acc) ->
+    Acc.
+
+get_cross_modules([{App,_}|Apps],Acc) ->
+    Mods = cross_modules(App),
+    get_cross_modules(Apps,lists:umerge(Mods,Acc));
+get_cross_modules([],Acc) ->
+    Acc.
+
+cross_modules(App) ->
+    case default_coverfile(App) of
+	none ->
+	    [];
+	File ->
+	    case catch file:consult(File) of
+		{ok,CoverSpec} ->
+		    case lists:keyfind(cross_apps,1,CoverSpec) of
+			false ->
+			    [];
+			{cross_apps,App,Modules} ->
+			    lists:usort(Modules)
+		    end;
+		_ ->
+		    []
+	    end
+    end.
 
 %%% Implementation.