config: correct bad boolean env value error message

An incorrectly defined boolean environment value would result in the
following error message:

bad boolean config value '%s' for '%s'

This is a misnomer since environment value != config value. Instead of
calling git_config_bool() to parse the environment value, mimic the
functionality inside of git_config_bool() but with the correct error
message.

Signed-off-by: Calvin Wan <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: calvin-wan-google

config.c

@@ -2133,7 +2133,14 @@ void git_global_config(char **user_out, char **xdg_out)
 int git_env_bool(const char *k, int def)
 {
 	const char *v = getenv(k);
-	return v ? git_config_bool(k, v) : def;
+	int val;
+	if (!v)
+		return def;
+	val = git_parse_maybe_bool(v);
+	if (val < 0)
+		die(_("bad boolean environment value '%s' for '%s'"),
+		    v, k);
+	return val;
 }
 
 /*