Make sure to pass dir of app when invoking git; enhance shell logging output

src/rebar_app_utils.erl

@@ -89,7 +89,8 @@ app_applications(AppFile) ->
 app_vsn(AppFile) ->
     case load_app_file(AppFile) of
         {ok, _, AppInfo} ->
-            vcs_vsn(get_value(vsn, AppInfo, AppFile));
+            AppDir = filename:dirname(filename:dirname(AppFile)),
+            vcs_vsn(get_value(vsn, AppInfo, AppFile), AppDir);
         {error, Reason} ->
             ?ABORT("Failed to extract vsn from ~s: ~p\n",
                    [AppFile, Reason])
@@ -125,12 +126,12 @@ get_value(Key, AppInfo, AppFile) ->
             Value
     end.
 
-vcs_vsn(Vcs) ->
+vcs_vsn(Vcs, Dir) ->
     case vcs_vsn_cmd(Vcs) of
         {unknown, VsnString} ->
             VsnString;
         Cmd ->
-            {ok, VsnString} = rebar_utils:sh(Cmd, [{use_stdout, false}]),
+            {ok, VsnString} = rebar_utils:sh(Cmd, [{cd, Dir}, {use_stdout, false}]),
             string:strip(VsnString, right, $\n)
     end.
 

src/rebar_utils.erl

@@ -75,7 +75,7 @@ get_arch() ->
 %% Val = string() | false
 %%
 sh(Command0, Options0) ->
-    ?INFO("sh: ~s\n~p\n", [Command0, Options0]),
+    ?INFO("sh info:\n\tcwd: ~pspan>\n\tn>cmd: ~s\n\topts: ~p\n", [get_cwd(), Command0, Options0]),
 
     DefaultOptions = [use_stdout, abort_on_error],
     Options = [expand_sh_flag(V)