each_ref_fn: change to take an object_id parameter

Change typedef each_ref_fn to take a "const struct object_id *oid"
parameter instead of "const unsigned char *sha1".

To aid this transition, implement an adapter that can be used to wrap
old-style functions matching the old typedef, which is now called
"each_ref_sha1_fn"), and make such functions callable via the new
interface. This requires the old function and its cb_data to be
wrapped in a "struct each_ref_fn_sha1_adapter", and that object to be
used as the cb_data for an adapter function, each_ref_fn_adapter().

This is an enormous diff, but most of it consists of simple,
mechanical changes to the sites that call any of the "for_each_ref"
family of functions. Subsequent to this change, the call sites can be
rewritten one by one to use the new interface.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/builtin/for-each-ref.c b/builtin/for-each-ref.c
index 83f9cf9163..caccd93ec5 100644
--- a/builtin/for-each-ref.c
+++ b/builtin/for-each-ref.c
@@ -1072,6 +1072,8 @@ int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
 	int maxcount = 0, quote_style = 0;
 	struct refinfo **refs;
 	struct grab_ref_cbdata cbdata;
+	struct each_ref_fn_sha1_adapter wrapped_grab_single_ref =
+		{grab_single_ref, &cbdata};
 
 	struct option opts[] = {
 		OPT_BIT('s', "shell", &quote_style,
@@ -1111,7 +1113,7 @@ int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
 
 	memset(&cbdata, 0, sizeof(cbdata));
 	cbdata.grab_pattern = argv;
-	for_each_rawref(grab_single_ref, &cbdata);
+	for_each_rawref(each_ref_fn_adapter, &wrapped_grab_single_ref);
 	refs = cbdata.grab_array;
 	num_refs = cbdata.grab_cnt;