Introduce usagef() that takes a printf-style format

diff --git a/lockfile.c b/lockfile.c
index 3dbb2d1ff9407a7417be294adedc5312e7421a96..6851fa55a503bd24dd204934d7433e306996ce09 100644 (file)
--- a/lockfile.c
+++ b/lockfile.c
@@ -16,7 +16,7 @@ static void remove_lock_file(void)
                    lock_file_list->filename[0]) {
                        if (lock_file_list->fd >= 0)
                                close(lock_file_list->fd);
-                       unlink(lock_file_list->filename);
+                       unlink_or_warn(lock_file_list->filename);
                }
                lock_file_list = lock_file_list->next;
        }
@@ -109,7 +109,7 @@ static char *resolve_symlink(char *p, size_t s)
                         * link is a relative path, so I must replace the
                         * last element of p with it.
                         */
-                       char *r = (char*)last_path_elm(p);
+                       char *r = (char *)last_path_elm(p);
                        if (r - p + link_len < s)
                                strcpy(r, link);
                        else {
@@ -155,18 +155,32 @@ static int lock_file(struct lock_file *lk, const char *path, int flags)
        return lk->fd;
 }
 
-
-NORETURN void unable_to_lock_index_die(const char *path, int err)
+static char *unable_to_lock_message(const char *path, int err)
 {
+       struct strbuf buf = STRBUF_INIT;
+
        if (err == EEXIST) {
-               die("Unable to create '%s.lock': %s.\n\n"
+               strbuf_addf(&buf, "Unable to create '%s.lock': %s.\n\n"
                    "If no other git process is currently running, this probably means a\n"
                    "git process crashed in this repository earlier. Make sure no other git\n"
                    "process is running and remove the file manually to continue.",
                    path, strerror(err));
-       } else {
-               die("Unable to create '%s.lock': %s", path, strerror(err));
-       }
+       } else
+               strbuf_addf(&buf, "Unable to create '%s.lock': %s", path, strerror(err));
+       return strbuf_detach(&buf, NULL);
+}
+
+int unable_to_lock_error(const char *path, int err)
+{
+       char *msg = unable_to_lock_message(path, err);
+       error("%s", msg);
+       free(msg);
+       return -1;
+}
+
+NORETURN void unable_to_lock_index_die(const char *path, int err)
+{
+       die("%s", unable_to_lock_message(path, err));
 }
 
 int hold_lock_file_for_update(struct lock_file *lk, const char *path, int flags)
@@ -259,7 +273,7 @@ void rollback_lock_file(struct lock_file *lk)
        if (lk->filename[0]) {
                if (lk->fd >= 0)
                        close(lk->fd);
-               unlink(lk->filename);
+               unlink_or_warn(lk->filename);
        }
        lk->filename[0] = 0;
 }