receive-pack: move more work into write_head_info()

Move some more code from the calling site into write_head_info(), and
inline add_alternate_refs() there.  (Some more simplification is
coming, and it is easier if all this code is in the same place.)

Move some helper functions to avoid the need for forward declarations.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index b6d957cb0d2659f2207287598b3566ed37a35ae0..43d161f811d43a554017652060796440f2806be4 100644 (file)
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -143,12 +143,30 @@ static int show_ref_cb(const char *path, const unsigned char *sha1, int flag, vo
        return show_ref(path, sha1, flag, cb_data);
 }
 
+static void add_one_alternate_sha1(const unsigned char sha1[20], void *unused)
+{
+       add_extra_ref(".have", sha1, 0);
+}
+
+static void collect_one_alternate_ref(const struct ref *ref, void *data)
+{
+       struct sha1_array *sa = data;
+       sha1_array_append(sa, ref->old_sha1);
+}
+
 static void write_head_info(void)
 {
+       struct sha1_array sa = SHA1_ARRAY_INIT;
+       for_each_alternate_ref(collect_one_alternate_ref, &sa);
+       sha1_array_for_each_unique(&sa, add_one_alternate_sha1, NULL);
+       sha1_array_clear(&sa);
        for_each_ref(show_ref_cb, NULL);
        if (!sent_capabilities)
                show_ref("capabilities^{}", null_sha1, 0, NULL);
+       clear_extra_refs();
 
+       /* EOF */
+       packet_flush(1);
 }
 
 struct command {
@@ -870,25 +888,6 @@ static int delete_only(struct command *commands)
        return 1;
 }
 
-static void add_one_alternate_sha1(const unsigned char sha1[20], void *unused)
-{
-       add_extra_ref(".have", sha1, 0);
-}
-
-static void collect_one_alternate_ref(const struct ref *ref, void *data)
-{
-       struct sha1_array *sa = data;
-       sha1_array_append(sa, ref->old_sha1);
-}
-
-static void add_alternate_refs(void)
-{
-       struct sha1_array sa = SHA1_ARRAY_INIT;
-       for_each_alternate_ref(collect_one_alternate_ref, &sa);
-       sha1_array_for_each_unique(&sa, add_one_alternate_sha1, NULL);
-       sha1_array_clear(&sa);
-}
-
 int cmd_receive_pack(int argc, const char **argv, const char *prefix)
 {
        int advertise_refs = 0;
@@ -938,12 +937,7 @@ int cmd_receive_pack(int argc, const char **argv, const char *prefix)
                unpack_limit = receive_unpack_limit;
 
        if (advertise_refs || !stateless_rpc) {
-               add_alternate_refs();
                write_head_info();
-               clear_extra_refs();
-
-               /* EOF */
-               packet_flush(1);
        }
        if (advertise_refs)
                return 0;