Fix bug in systools:make_tar when path given as just 'ebin'

If a path was given as ONLY 'ebin' and not for example './ebin', then
systools:make_tar would fail with a function_clause exception in
filename:join/1. The bug was in systools_make:appDir/1, which tried to
find the parent directory of the given path. This function now uses
library functions filename:basename and filename:dirname instead of
general list manipulations.

3 files changed, 49 insertions, 7 deletions

diff --git a/lib/sasl/src/release_handler.erl b/lib/sasl/src/release_handler.erl
index 4f01f5f559..bc08f94dff 100644
--- a/lib/sasl/src/release_handler.erl
+++ b/lib/sasl/src/release_handler.erl
@@ -174,7 +174,7 @@ check_install_release(Vsn, Opts) ->
 
 check_check_install_options([purge|Opts], _) ->
     check_check_install_options(Opts, true);
-check_check_install_options([Illegal|_],Purge) ->
+check_check_install_options([Illegal|_],_Purge) ->
     {error,{illegal_option,Illegal}};
 check_check_install_options([],Purge) ->
     {ok,Purge}.
@@ -2001,7 +2001,7 @@ safe_write_file_m(File, Data, Masters) ->
 %% 'update_paths' option to release_handler:install_release/2 if the
 %% code path shall be updated then.
 %% -----------------------------------------------------------------
-get_new_libs([{App,Vsn,LibDir}|CurrentLibs], NewLibs) ->
+get_new_libs([{App,Vsn,_LibDir}|CurrentLibs], NewLibs) ->
     case lists:keyfind(App,1,NewLibs) of
 	{App,NewVsn,_} = LibInfo when NewVsn =/= Vsn ->
 	    [LibInfo | get_new_libs(CurrentLibs,NewLibs)];
diff --git a/lib/sasl/src/systools_make.erl b/lib/sasl/src/systools_make.erl
index 7489ee58d2..5dc83e7b2a 100644
--- a/lib/sasl/src/systools_make.erl
+++ b/lib/sasl/src/systools_make.erl
@@ -1612,9 +1612,9 @@ var_dir(_Dir, _, _, []) ->
     false.
 
 appDir(AppDir) ->
-    case reverse(filename:split(AppDir)) of
-	["ebin"|Dir] -> filename:join(reverse(Dir));
-	_            -> AppDir
+    case filename:basename(AppDir) of
+	"ebin" -> filename:dirname(AppDir);
+	_ -> AppDir
     end.
 
 add_modules(Modules, Tar, AppDir, ToDir, Ext) ->
diff --git a/lib/sasl/test/systools_SUITE.erl b/lib/sasl/test/systools_SUITE.erl
index 9190b111ef..539f6de99d 100644
--- a/lib/sasl/test/systools_SUITE.erl
+++ b/lib/sasl/test/systools_SUITE.erl
@@ -48,7 +48,7 @@
 	  included_fail_script/1, included_bug_script/1, exref_script/1]).
 -export([ tar_options/1, normal_tar/1, no_mod_vsn_tar/1, variable_tar/1,
 	  src_tests_tar/1, shadow_tar/1, var_tar/1,
-	  exref_tar/1, link_tar/1]).
+	  exref_tar/1, link_tar/1, otp_9507/1]).
 -export([ normal_relup/1, abnormal_relup/1, no_appup_relup/1,
 	  bad_appup_relup/1, app_start_type_relup/1, otp_3065/1]).
 -export([
@@ -81,7 +81,7 @@ groups() ->
      {tar, [],
       [tar_options, normal_tar, no_mod_vsn_tar, variable_tar,
        src_tests_tar, shadow_tar, var_tar,
-       exref_tar, link_tar]},
+       exref_tar, link_tar, otp_9507]},
      {relup, [],
       [normal_relup, abnormal_relup, no_appup_relup,
        bad_appup_relup, app_start_type_relup]},
@@ -1066,6 +1066,48 @@ exref_tar(Config) when is_list(Config) ->
     ?line ok = file:set_cwd(OldDir),
     ok.
 
+
+
+%% otp_9507
+%%
+otp_9507(suite) -> [];
+otp_9507(doc) ->
+    ["make_tar failed when path given as just 'ebin'."];
+otp_9507(Config) when is_list(Config) ->
+    ?line {ok, OldDir} = file:get_cwd(),
+
+    ?line {LatestDir, LatestName} = create_script(latest_small,Config),
+
+    ?line DataDir = filename:absname(?copydir),
+    ?line LibDir = fname([DataDir, d_normal, lib]),
+    ?line FeDir = fname([LibDir, 'fe-3.1']),
+
+    ?line ok = file:set_cwd(FeDir),
+
+    RelName = fname([LatestDir,LatestName]),
+
+    ?line P1 = ["./ebin",
+	       fname([DataDir, lib, kernel, ebin]),
+	       fname([DataDir, lib, stdlib, ebin])],
+    ?line {ok, _, _} = systools:make_script(RelName, [silent, {path, P1}]),
+    ?line ok = systools:make_tar(RelName, [{path, P1}]),
+    ?line Content1 = tar_contents(RelName),
+
+    ?line P2 = ["ebin",
+	       fname([DataDir, lib, kernel, ebin]),
+	       fname([DataDir, lib, stdlib, ebin])],
+
+    %% Tickets solves the following line - it used to fail with
+    %% {function_clause,[{filename,join,[[]]},...}
+    ?line ok = systools:make_tar(RelName, [{path, P2}]),
+    ?line Content2 = tar_contents(RelName),
+    true = (Content1 == Content2),
+
+    ?line ok = file:set_cwd(OldDir),
+
+    ok.
+
+
 %% The relup stuff.
 %%
 %%