git-p4: Unset P4DIFF environment variable when using 'p4 -du diff'

diff --git a/builtin-config.c b/builtin-config.c
index e4a12e316648e6b0ab1ee0b424773f3c672c751e..2b9a4261d4e98281855ce856041eb730565a4869 100644 (file)
--- a/builtin-config.c
+++ b/builtin-config.c
@@ -79,9 +79,10 @@ static int get_value(const char* key_, const char* regex_)
                local = getenv(CONFIG_LOCAL_ENVIRONMENT);
                if (!local)
                        local = repo_config = xstrdup(git_path("config"));
-               if (home)
+               if (git_config_global() && home)
                        global = xstrdup(mkpath("%s/.gitconfig", home));
-               system_wide = git_etc_gitconfig();
+               if (git_config_system())
+                       system_wide = git_etc_gitconfig();
        }
 
        key = xstrdup(key_);
@@ -168,6 +169,8 @@ static char parsed_color[COLOR_MAXLEN];
 static int git_get_color_config(const char *var, const char *value)
 {
        if (!strcmp(var, get_color_slot)) {
+               if (!value)
+                       config_error_nonbool(var);
                color_parse(value, var, parsed_color);
                get_color_found = 1;
        }