[PATCH v2 04/11] for_each_alternate_ref: pass name/oid instead of ref struct

[Jeff King]

Breaking down the fields in the interface makes it easier to
change the backend of for_each_alternate_ref to something
that doesn't use "struct ref" internally.

The only field that callers actually look at is the oid,
anyway. The refname is kept in the interface as a plausible
thing for future code to want.

Signed-off-by: Jeff King <p...@peff.net>
---
 builtin/receive-pack.c |  6 ++++--
 fetch-pack.c           | 12 ++++++++----
 transport.c            |  2 +-
 transport.h            |  2 +-
 4 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index 1dbb8a069..d21332d9e 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -277,10 +277,12 @@ static int show_one_alternate_sha1(const unsigned char 
sha1[20], void *unused)
        return 0;
 }
 
-static void collect_one_alternate_ref(const struct ref *ref, void *data)
+static void collect_one_alternate_ref(const char *refname,
+                                     const struct object_id *oid,
+                                     void *data)
 {
        struct sha1_array *sa = data;
-       sha1_array_append(sa, ref->old_oid.hash);
+       sha1_array_append(sa, oid->hash);
 }
 
 static void write_head_info(void)
diff --git a/fetch-pack.c b/fetch-pack.c
index 601f0779a..54f84c573 100644
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -253,9 +253,11 @@ static void send_request(struct fetch_pack_args *args,
                write_or_die(fd, buf->buf, buf->len);
 }
 
-static void insert_one_alternate_ref(const struct ref *ref, void *unused)
+static void insert_one_alternate_ref(const char *refname,
+                                    const struct object_id *oid,
+                                    void *unused)
 {
-       rev_list_insert_ref(NULL, ref->old_oid.hash);
+       rev_list_insert_ref(NULL, oid->hash);
 }
 
 #define INITIAL_FLUSH 16
@@ -619,9 +621,11 @@ static void filter_refs(struct fetch_pack_args *args,
        *refs = newlist;
 }
 
-static void mark_alternate_complete(const struct ref *ref, void *unused)
+static void mark_alternate_complete(const char *refname,
+                                   const struct object_id *oid,
+                                   void *unused)
 {
-       mark_complete(ref->old_oid.hash);
+       mark_complete(oid->hash);
 }
 
 static int everything_local(struct fetch_pack_args *args,
diff --git a/transport.c b/transport.c
index 6b7847131..c87147046 100644
--- a/transport.c
+++ b/transport.c
@@ -1238,7 +1238,7 @@ static int refs_from_alternate_cb(struct 
alternate_object_database *e,
        for (extra = transport_get_remote_refs(transport);
             extra;
             extra = extra->next)
-               cb->fn(extra, cb->data);
+               cb->fn(extra->name, &extra->old_oid, cb->data);
        transport_disconnect(transport);
 out:
        strbuf_release(&path);
diff --git a/transport.h b/transport.h
index e597b31b3..bc5571574 100644
--- a/transport.h
+++ b/transport.h
@@ -255,6 +255,6 @@ int transport_refs_pushed(struct ref *ref);
 void transport_print_push_status(const char *dest, struct ref *refs,
                  int verbose, int porcelain, unsigned int *reject_reasons);
 
-typedef void alternate_ref_fn(const struct ref *, void *);
+typedef void alternate_ref_fn(const char *refname, const struct object_id 
*oid, void *);
 extern void for_each_alternate_ref(alternate_ref_fn, void *);
 #endif
-- 
2.12.0.rc0.371.ga6cf8653b