check-attr: add an internal check_attr() function

diff --git a/color.c b/color.c
index 124ba331c7f798b9b922fc8482dbc215202b99a6..fc0b72ad59b13e4bd86372e5e81b4f400c99d26e 100644 (file)
--- a/color.c
+++ b/color.c
@@ -3,6 +3,8 @@
 
 #define COLOR_RESET "\033[m"
 
+int git_use_color_default = 0;
+
 static int parse_color(const char *name, int len)
 {
        static const char * const color_names[] = {
@@ -17,7 +19,7 @@ static int parse_color(const char *name, int len)
                        return i - 1;
        }
        i = strtol(name, &end, 10);
-       if (*name && !*end && i >= -1 && i <= 255)
+       if (end - name == len && i >= -1 && i <= 255)
                return i;
        return -2;
 }
@@ -116,23 +118,41 @@ void color_parse(const char *value, const char *var, char *dst)
        die("bad config value '%s' for variable '%s'", value, var);
 }
 
-int git_config_colorbool(const char *var, const char *value)
+int git_config_colorbool(const char *var, const char *value, int stdout_is_tty)
 {
-       if (!value)
-               return 1;
-       if (!strcasecmp(value, "auto")) {
-               if (isatty(1) || (pager_in_use && pager_use_color)) {
-                       char *term = getenv("TERM");
-                       if (term && strcmp(term, "dumb"))
-                               return 1;
-               }
+       if (value) {
+               if (!strcasecmp(value, "never"))
+                       return 0;
+               if (!strcasecmp(value, "always"))
+                       return 1;
+               if (!strcasecmp(value, "auto"))
+                       goto auto_color;
+       }
+
+       /* Missing or explicit false to turn off colorization */
+       if (!git_config_bool(var, value))
                return 0;
+
+       /* any normal truth value defaults to 'auto' */
+ auto_color:
+       if (stdout_is_tty < 0)
+               stdout_is_tty = isatty(1);
+       if (stdout_is_tty || (pager_in_use() && pager_use_color)) {
+               char *term = getenv("TERM");
+               if (term && strcmp(term, "dumb"))
+                       return 1;
        }
-       if (!strcasecmp(value, "never"))
+       return 0;
+}
+
+int git_color_default_config(const char *var, const char *value, void *cb)
+{
+       if (!strcmp(var, "color.ui")) {
+               git_use_color_default = git_config_colorbool(var, value, -1);
                return 0;
-       if (!strcasecmp(value, "always"))
-               return 1;
-       return git_config_bool(var, value);
+       }
+
+       return git_default_config(var, value, cb);
 }
 
 static int color_vfprintf(FILE *fp, const char *color, const char *fmt,