Introduce usagef() that takes a printf-style format

diff --git a/patch-id.c b/patch-id.c
index 871f1d20c0e364220d23035b34685ced8737cda8..0df4cb086ba26d1f4d56b8347a6a7bcf219832f5 100644 (file)
--- a/patch-id.c
+++ b/patch-id.c
@@ -1,4 +1,5 @@
 #include "cache.h"
+#include "exec_cmd.h"
 
 static void flush_current_id(int patchlen, unsigned char *id, git_SHA_CTX *c)
 {
@@ -72,13 +73,15 @@ static void generate_id_list(void)
        flush_current_id(patchlen, sha1, &ctx);
 }
 
-static const char patch_id_usage[] = "git-patch-id < patch";
+static const char patch_id_usage[] = "git patch-id < patch";
 
 int main(int argc, char **argv)
 {
        if (argc != 1)
                usage(patch_id_usage);
 
+       git_extract_argv0_path(argv[0]);
+
        generate_id_list();
        return 0;
 }