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-rw-r--r--src/rebar_cover_utils.erl261
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diff --git a/src/rebar_cover_utils.erl b/src/rebar_cover_utils.erl
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-%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
-%% ex: ts=4 sw=4 et
-%% -------------------------------------------------------------------
-%%
-%% rebar: Erlang Build Tools
-%%
-%% Copyright (c) 2009, 2010 Dave Smith (dizzyd@dizzyd.com)
-%% Copyright (c) 2013 Andras Horvath (andras.horvath@erlang-solutions.com)
-%%
-%% Permission is hereby granted, free of charge, to any person obtaining a copy
-%% of this software and associated documentation files (the "Software"), to deal
-%% in the Software without restriction, including without limitation the rights
-%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-%% copies of the Software, and to permit persons to whom the Software is
-%% furnished to do so, subject to the following conditions:
-%%
-%% The above copyright notice and this permission notice shall be included in
-%% all copies or substantial portions of the Software.
-%%
-%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-%% THE SOFTWARE.
-%% -------------------------------------------------------------------
--module(rebar_cover_utils).
-
-%% for internal use only
--export([init/3,
- perform_cover/4,
- close/1,
- exit/0]).
-
--include("rebar.hrl").
-
-%% ====================================================================
-%% Internal functions
-%% ====================================================================
-
-perform_cover(Config, BeamFiles, SrcModules, TargetDir) ->
- perform_cover(rebar_config:get(Config, cover_enabled, false),
- Config, BeamFiles, SrcModules, TargetDir).
-
-perform_cover(false, _Config, _BeamFiles, _SrcModules, _TargetDir) ->
- ok;
-perform_cover(true, Config, BeamFiles, SrcModules, TargetDir) ->
- analyze(Config, BeamFiles, SrcModules, TargetDir).
-
-close(not_enabled) ->
- ok;
-close(F) ->
- ok = file:close(F).
-
-exit() ->
- cover:stop().
-
-init(false, _BeamFiles, _TargetDir) ->
- {ok, not_enabled};
-init(true, BeamFiles, TargetDir) ->
- %% Attempt to start the cover server, then set its group leader to
- %% TargetDir/cover.log, so all cover log messages will go there instead of
- %% to stdout. If the cover server is already started, we'll kill that
- %% server and start a new one in order not to inherit a polluted
- %% cover_server state.
- {ok, CoverPid} = case whereis(cover_server) of
- undefined ->
- cover:start();
- _ ->
- cover:stop(),
- cover:start()
- end,
-
- {ok, F} = OkOpen = file:open(
- filename:join([TargetDir, "cover.log"]),
- [write]),
-
- group_leader(F, CoverPid),
-
- ?INFO("Cover compiling ~s\n", [rebar_utils:get_cwd()]),
-
- Compiled = [{Beam, cover:compile_beam(Beam)} || Beam <- BeamFiles],
- case [Module || {_, {ok, Module}} <- Compiled] of
- [] ->
- %% No modules compiled successfully...fail
- ?ERROR("Cover failed to compile any modules; aborting.~n", []),
- ?FAIL;
- _ ->
- %% At least one module compiled successfully
-
- %% It's not an error for cover compilation to fail partially,
- %% but we do want to warn about them
- PrintWarning =
- fun(Beam, Desc) ->
- ?CONSOLE("Cover compilation warning for ~p: ~p",
- [Beam, Desc])
- end,
- _ = [PrintWarning(Beam, Desc) || {Beam, {error, Desc}} <- Compiled],
- OkOpen
- end;
-init(Config, BeamFiles, TargetDir) ->
- init(rebar_config:get(Config, cover_enabled, false), BeamFiles, TargetDir).
-
-analyze(_Config, [], _SrcModules, _TargetDir) ->
- ok;
-analyze(Config, FilteredModules, SrcModules, TargetDir) ->
- %% Generate coverage info for all the cover-compiled modules
- Coverage = lists:flatten([analyze_mod(M)
- || M <- FilteredModules,
- cover:is_compiled(M) =/= false]),
-
- %% Write index of coverage info
- write_index(lists:sort(Coverage), SrcModules, TargetDir),
-
- %% Write coverage details for each file
- lists:foreach(
- fun({M, _, _}) ->
- {ok, _} = cover:analyze_to_file(M,
- cover_file(M, TargetDir),
- [html])
- end, Coverage),
-
- Index = filename:join([rebar_utils:get_cwd(), TargetDir, "index.html"]),
- ?CONSOLE("Cover analysis: ~s\n", [Index]),
-
- %% Export coverage data, if configured
- case rebar_config:get(Config, cover_export_enabled, false) of
- true ->
- export_coverdata(TargetDir);
- false ->
- ok
- end,
-
- %% Print coverage report, if configured
- case rebar_config:get(Config, cover_print_enabled, false) of
- true ->
- print_coverage(lists:sort(Coverage));
- false ->
- ok
- end.
-
-analyze_mod(Module) ->
- case cover:analyze(Module, coverage, module) of
- {ok, {Module, {Covered, NotCovered}}} ->
- %% Modules that include the eunit header get an implicit
- %% test/0 fun, which cover considers a runnable line, but
- %% eunit:test(TestRepresentation) never calls. Decrement
- %% NotCovered in this case.
- [align_notcovered_count(Module, Covered, NotCovered,
- is_eunitized(Module))];
- {error, Reason} ->
- ?ERROR("Cover analyze failed for ~p: ~p ~p\n",
- [Module, Reason, code:which(Module)]),
- []
- end.
-
-is_eunitized(Mod) ->
- has_eunit_test_fun(Mod) andalso
- has_header(Mod, "include/eunit.hrl").
-
-has_eunit_test_fun(Mod) ->
- [F || {exports, Funs} <- Mod:module_info(),
- {F, 0} <- Funs, F =:= test] =/= [].
-
-has_header(Mod, Header) ->
- Mod1 = case code:which(Mod) of
- cover_compiled ->
- {file, File} = cover:is_compiled(Mod),
- File;
- non_existing -> Mod;
- preloaded -> Mod;
- L -> L
- end,
- {ok, {_, [{abstract_code, {_, AC}}]}} =
- beam_lib:chunks(Mod1, [abstract_code]),
- [F || {attribute, 1, file, {F, 1}} <- AC,
- string:str(F, Header) =/= 0] =/= [].
-
-align_notcovered_count(Module, Covered, NotCovered, false) ->
- {Module, Covered, NotCovered};
-align_notcovered_count(Module, Covered, NotCovered, true) ->
- {Module, Covered, NotCovered - 1}.
-
-write_index(Coverage, SrcModules, TargetDir) ->
- {ok, F} = file:open(filename:join([TargetDir, "index.html"]), [write]),
- ok = file:write(F, "<!DOCTYPE HTML><html>\n"
- "<head><meta charset=\"utf-8\">"
- "<title>Coverage Summary</title></head>\n"
- "<body>\n"),
- IsSrcCoverage = fun({Mod,_C,_N}) -> lists:member(Mod, SrcModules) end,
- {SrcCoverage, TestCoverage} = lists:partition(IsSrcCoverage, Coverage),
- write_index_section(F, "Source", SrcCoverage),
- write_index_section(F, "Test", TestCoverage),
- ok = file:write(F, "</body></html>"),
- ok = file:close(F).
-
-write_index_section(_F, _SectionName, []) ->
- ok;
-write_index_section(F, SectionName, Coverage) ->
- %% Calculate total coverage
- {Covered, NotCovered} = lists:foldl(fun({_Mod, C, N}, {CAcc, NAcc}) ->
- {CAcc + C, NAcc + N}
- end, {0, 0}, Coverage),
- TotalCoverage = percentage(Covered, NotCovered),
-
- %% Write the report
- ok = file:write(F, ?FMT("<h1>~s Summary</h1>\n", [SectionName])),
- ok = file:write(F, ?FMT("<h3>Total: ~s</h3>\n", [TotalCoverage])),
- ok = file:write(F, "<table><tr><th>Module</th><th>Coverage %</th></tr>\n"),
-
- FmtLink =
- fun(Module, Cov, NotCov) ->
- ?FMT("<tr><td><a href='~s.COVER.html'>~s</a></td><td>~s</td>\n",
- [Module, Module, percentage(Cov, NotCov)])
- end,
- lists:foreach(fun({Module, Cov, NotCov}) ->
- ok = file:write(F, FmtLink(Module, Cov, NotCov))
- end, Coverage),
- ok = file:write(F, "</table>\n").
-
-print_coverage(Coverage) ->
- {Covered, NotCovered} = lists:foldl(fun({_Mod, C, N}, {CAcc, NAcc}) ->
- {CAcc + C, NAcc + N}
- end, {0, 0}, Coverage),
- TotalCoverage = percentage(Covered, NotCovered),
-
- %% Determine the longest module name for right-padding
- Width = lists:foldl(fun({Mod, _, _}, Acc) ->
- case length(atom_to_list(Mod)) of
- N when N > Acc ->
- N;
- _ ->
- Acc
- end
- end, 0, Coverage) * -1,
-
- %% Print the output the console
- ?CONSOLE("~nCode Coverage:~n", []),
- lists:foreach(fun({Mod, C, N}) ->
- ?CONSOLE("~*s : ~3s~n",
- [Width, Mod, percentage(C, N)])
- end, Coverage),
- ?CONSOLE("~n~*s : ~s~n", [Width, "Total", TotalCoverage]).
-
-cover_file(Module, TargetDir) ->
- filename:join([TargetDir, atom_to_list(Module) ++ ".COVER.html"]).
-
-export_coverdata(TargetDir) ->
- ExportFile = filename:join(TargetDir, "cover.coverdata"),
- case cover:export(ExportFile) of
- ok ->
- ?CONSOLE("Coverdata export: ~s~n", [ExportFile]);
- {error, Reason} ->
- ?ERROR("Coverdata export failed: ~p~n", [Reason])
- end.
-
-percentage(0, 0) ->
- "not executed";
-percentage(Cov, NotCov) ->
- integer_to_list(trunc((Cov / (Cov + NotCov)) * 100)) ++ "%".