setup.c: support multi-checkout repo setup

diff --git a/wrapper.c b/wrapper.c
index 5b77d2a1aecd494ea4bb5eb1e6f31afc9c96f82e..007ec0d8eac529579cc00b14f9baaddb7ac68487 100644 (file)
--- a/wrapper.c
+++ b/wrapper.c
@@ -466,17 +466,29 @@ int xmkstemp_mode(char *template, int mode)
 
 static int warn_if_unremovable(const char *op, const char *file, int rc)
 {
-       if (rc < 0) {
-               int err = errno;
-               if (ENOENT != err) {
-                       warning("unable to %s %s: %s",
-                               op, file, strerror(errno));
-                       errno = err;
-               }
-       }
+       int err;
+       if (!rc || errno == ENOENT)
+               return 0;
+       err = errno;
+       warning("unable to %s %s: %s", op, file, strerror(errno));
+       errno = err;
        return rc;
 }
 
+int unlink_or_msg(const char *file, struct strbuf *err)
+{
+       int rc = unlink(file);
+
+       assert(err);
+
+       if (!rc || errno == ENOENT)
+               return 0;
+
+       strbuf_addf(err, "unable to unlink %s: %s",
+                   file, strerror(errno));
+       return -1;
+}
+
 int unlink_or_warn(const char *file)
 {
        return warn_if_unremovable("unlink", file, unlink(file));