Recompile when include files change

src/rebar_erlc_compiler.erl

@@ -787,8 +787,9 @@ outdir(RebarOpts) ->
     proplists:get_value(outdir, ErlOpts, ?DEFAULT_OUTDIR).
 
 include_abs_dirs(ErlOpts, BaseDir) ->
-    InclDirs = ["include"|proplists:get_all_values(i, ErlOpts)],
-    lists:map(fun(Incl) -> filename:join([BaseDir, Incl]) end, InclDirs).
+    ErlOptIncludes = proplists:get_all_values(i, ErlOpts),
+    InclDirs = lists:map(fun(Incl) -> filename:absname(Incl) end, ErlOptIncludes),
+    [filename:join([BaseDir, "include"])|InclDirs].
 
 dir_recursive(Opts, Dir, CompileOpts) when is_list(CompileOpts) ->
     case proplists:get_value(recursive,CompileOpts) of

test/rebar_compile_SUITE.erl

@@ -24,6 +24,7 @@
          clean_extra_dirs_in_project_root/1,
          recompile_when_hrl_changes/1,
          recompile_when_included_hrl_changes/1,
+         recompile_when_opts_included_hrl_changes/1,
          recompile_when_opts_change/1,
          dont_recompile_when_opts_dont_change/1,
          dont_recompile_yrl_or_xrl/1,
@@ -66,6 +67,7 @@ all() ->
      {group, basic_extras}, {group, release_extras}, {group, unbalanced_extras},
      {group, root_extras},
      recompile_when_hrl_changes, recompile_when_included_hrl_changes,
+     recompile_when_opts_included_hrl_changes,
      recompile_when_opts_change,
      dont_recompile_when_opts_dont_change, dont_recompile_yrl_or_xrl,
      delete_beam_if_source_deleted,
@@ -752,6 +754,53 @@ recompile_when_included_hrl_changes(Config) ->
 
     ?assert(ModTime =/= NewModTime).
 
+recompile_when_opts_included_hrl_changes(Config) ->
+    AppsDir = ?config(apps, Config),
+
+    Name = rebar_test_utils:create_random_name("app1_"),
+    Vsn = rebar_test_utils:create_random_vsn(),
+    AppDir = filename:join([AppsDir, "apps", Name]),
+
+    rebar_test_utils:create_app(AppDir, Name, Vsn, [kernel, stdlib]),
+
+    ExtraSrc = <<"-module(test_header_include).\n"
+                  "-export([main/0]).\n"
+                  "-include(\"test_header_include.hrl\").\n"
+                  "main() -> ?SOME_DEFINE.\n">>,
+
+    ExtraHeader = <<"-define(SOME_DEFINE, true).\n">>,
+    ok = filelib:ensure_dir(filename:join([AppsDir, "include", "dummy"])),
+    HeaderFile = filename:join([AppsDir, "include", "test_header_include.hrl"]),
+    ok = file:write_file(filename:join([AppDir, "src", "test_header_include.erl"]), ExtraSrc),
+    ok = file:write_file(HeaderFile, ExtraHeader),
+
+    %% Using relative path from the project root
+    RebarConfig = [{erl_opts, [{i, "include/"}]}],
+    {ok,Cwd} = file:get_cwd(),
+    ok = file:set_cwd(AppsDir),
+
+    rebar_test_utils:run_and_check(Config, RebarConfig, ["compile"], {ok, [{app, Name}]}),
+
+    EbinDir = filename:join([AppsDir, "_build", "default", "lib", Name, "ebin"]),
+    {ok, Files} = rebar_utils:list_dir(EbinDir),
+    ModTime = [filelib:last_modified(filename:join([EbinDir, F]))
+               || F <- Files, filename:extension(F) == ".beam"],
+
+    timer:sleep(1000),
+
+    NewExtraHeader = <<"-define(SOME_DEFINE, false).\n">>,
+    ok = file:write_file(HeaderFile, NewExtraHeader),
+
+    rebar_test_utils:run_and_check(Config, RebarConfig, ["compile"], {ok, [{app, Name}]}),
+
+    {ok, NewFiles} = rebar_utils:list_dir(EbinDir),
+    NewModTime = [filelib:last_modified(filename:join([EbinDir, F]))
+                  || F <- NewFiles, filename:extension(F) == ".beam"],
+
+    ok = file:set_cwd(Cwd),
+
+    ?assert(ModTime =/= NewModTime).
+
 recompile_when_opts_change(Config) ->
     AppDir = ?config(apps, Config),