- start with scott's commit 0d3acb0

- fix the issue introduced in 6c97173 more mininally
- ifdef out env reading even though it doesn't matter

Makefile

@@ -23,10 +23,10 @@ clean:
 test: deps compile eunit_erlang eunit_nif
 
 eunit_erlang:
-	IOMODE="erlang" $(REBAR_BIN) skip_deps=true eunit
+	BITCASK_IO_MODE="erlang" $(REBAR_BIN) skip_deps=true eunit
 
 eunit_nif:
-	IOMODE="nif" $(REBAR_BIN) skip_deps=true eunit
+	BITCASK_IO_MODE="nif" $(REBAR_BIN) skip_deps=true eunit
 
 
 # Release tarball creation

src/bitcask.erl

@@ -1386,17 +1386,11 @@ default_dataset() ->
 %% HACK: Terrible hack to ensure that the .app file for
 %% bitcask is available on the code path. Assumption here
 %% is that we're running in .eunit/ as part of rebar.
-%% MORE HACK: init the io mode (nif or erlang) here.
 a0_test() ->
     code:add_pathz("../ebin"),
     application:start(erlang),
-    Mode0 = case os:getenv("IOMODE") of
-                false -> "erlang";
-                Else -> Else
-            end,
-    Mode = list_to_atom(Mode0),
-    application:set_env(bitcask, io_mode, Mode),
-    error_logger:info_msg("Set IO mode to: ~p", [Mode]).
+    Mode = bitcask_io:determine_file_module(),
+    error_logger:info_msg("Bitcask IO mode is: ~p\n", [Mode]).
 
 roundtrip_test() ->
     os:cmd("rm -rf /tmp/bc.test.roundtrip"),

src/bitcask_fileops.erl

@@ -65,7 +65,9 @@
 -spec create_file(Dirname :: string(), Opts :: [any()],
                   reference()) -> 
                          {ok, #filestate{}}.
-create_file(DirName, Opts, Keydir) ->
+
+create_file(DirName, Opts0, Keydir) ->
+    Opts = [create|Opts0],
     {ok, Lock} = get_create_lock(DirName),
     try 
         {ok, Newest} = bitcask_nifs:increment_file_id(Keydir),

src/bitcask_io.erl

@@ -68,6 +68,23 @@ file_module() ->
             Mod
     end.
 
+-ifdef(TEST).
+determine_file_module() ->
+    case application:get_env(bitcask, io_mode) of
+        {ok, erlang} ->
+            bitcask_file;
+        {ok, nif} ->
+            bitcask_nifs;
+        _ ->
+            Mode = case os:getenv("BITCASK_IO_MODE") of
+                       false    -> 'erlang';
+                       "erlang" -> 'erlang';
+                       "nif"    -> 'nif'
+                    end,
+            application:set_env(bitcask, io_mode, Mode),
+            determine_file_module()
+    end.
+-else.
 determine_file_module() ->
     case application:get_env(bitcask, io_mode) of
         {ok, erlang} ->
@@ -77,3 +94,4 @@ determine_file_module() ->
         _ ->
             bitcask_file
     end.
+-endif.