format-patch: make "-p" suppress diffstat

diff --git a/sha1_file.c b/sha1_file.c
index 1d996a199036c115d46c1d630d53edf29b3b78e7..4ea0b18d0aaeca48ed75ed21863195c5ce830cbc 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -2144,13 +2144,26 @@ static void *read_object(const unsigned char *sha1, enum object_type *type,
        return read_packed_sha1(sha1, type, size);
 }
 
-void *read_sha1_file(const unsigned char *sha1, enum object_type *type,
-                    unsigned long *size)
+void *read_sha1_file_repl(const unsigned char *sha1,
+                         enum object_type *type,
+                         unsigned long *size,
+                         const unsigned char **replacement)
 {
-       void *data = read_object(sha1, type, size);
+       const unsigned char *repl = lookup_replace_object(sha1);
+       void *data = read_object(repl, type, size);
+
+       /* die if we replaced an object with one that does not exist */
+       if (!data && repl != sha1)
+               die("replacement %s not found for %s",
+                   sha1_to_hex(repl), sha1_to_hex(sha1));
+
        /* legacy behavior is to die on corrupted objects */
-       if (!data && (has_loose_object(sha1) || has_packed_and_bad(sha1)))
-               die("object %s is corrupted", sha1_to_hex(sha1));
+       if (!data && (has_loose_object(repl) || has_packed_and_bad(repl)))
+               die("object %s is corrupted", sha1_to_hex(repl));
+
+       if (replacement)
+               *replacement = repl;
+
        return data;
 }