Introduce usagef() that takes a printf-style format

diff --git a/cache.h b/cache.h
index 96840c7af78aac3c760586dd8018652ec9ddefed..71a731dbc988a8a22d0a2e1f8f3a5223f4c5d67a 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -396,6 +396,7 @@ extern const char *setup_git_directory_gently(int *);
 extern const char *setup_git_directory(void);
 extern const char *prefix_path(const char *prefix, int len, const char *path);
 extern const char *prefix_filename(const char *prefix, int len, const char *path);
+extern int check_filename(const char *prefix, const char *name);
 extern void verify_filename(const char *prefix, const char *name);
 extern void verify_non_filename(const char *prefix, const char *name);