[PATCH v3 48/53] merge: convert checkout_fast_forward to struct object_id

[brian m. carlson]

Converting checkout_fast_forward is required to convert
parse_tree_indirect.

Signed-off-by: brian m. carlson <sand...@crustytoothpaste.net>
---
 builtin/merge.c | 4 ++--
 builtin/pull.c  | 4 ++--
 cache.h         | 4 ++--
 merge.c         | 8 ++++----
 sequencer.c     | 2 +-
 5 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/builtin/merge.c b/builtin/merge.c
index f11b5f3de..5ea7f7da9 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -1372,8 +1372,8 @@ int cmd_merge(int argc, const char **argv, const char 
*prefix)
                        goto done;
                }
 
-               if (checkout_fast_forward(head_commit->object.oid.hash,
-                                         commit->object.oid.hash,
+               if (checkout_fast_forward(&head_commit->object.oid,
+                                         &commit->object.oid,
                                          overwrite_ignore)) {
                        ret = 1;
                        goto done;
diff --git a/builtin/pull.c b/builtin/pull.c
index 2ffb6569a..318c273eb 100644
--- a/builtin/pull.c
+++ b/builtin/pull.c
@@ -523,7 +523,7 @@ static int pull_into_void(const struct object_id 
*merge_head,
         * index/worktree changes that the user already made on the unborn
         * branch.
         */
-       if (checkout_fast_forward(EMPTY_TREE_SHA1_BIN, merge_head->hash, 0))
+       if (checkout_fast_forward(&empty_tree_oid, merge_head, 0))
                return 1;
 
        if (update_ref("initial pull", "HEAD", merge_head->hash, 
curr_head->hash, 0, UPDATE_REFS_DIE_ON_ERR))
@@ -839,7 +839,7 @@ int cmd_pull(int argc, const char **argv, const char 
*prefix)
                        "fast-forwarding your working tree from\n"
                        "commit %s."), oid_to_hex(&orig_head));
 
-               if (checkout_fast_forward(orig_head.hash, curr_head.hash, 0))
+               if (checkout_fast_forward(&orig_head, &curr_head, 0))
                        die(_("Cannot fast-forward your working tree.\n"
                                "After making sure that you saved anything 
precious from\n"
                                "$ git diff %s\n"
diff --git a/cache.h b/cache.h
index e1f0e182a..8862510f9 100644
--- a/cache.h
+++ b/cache.h
@@ -2198,8 +2198,8 @@ struct commit_list;
 int try_merge_command(const char *strategy, size_t xopts_nr,
                const char **xopts, struct commit_list *common,
                const char *head_arg, struct commit_list *remotes);
-int checkout_fast_forward(const unsigned char *from,
-                         const unsigned char *to,
+int checkout_fast_forward(const struct object_id *from,
+                         const struct object_id *to,
                          int overwrite_ignore);
 
 
diff --git a/merge.c b/merge.c
index 04ee5fc91..b0cffe16f 100644
--- a/merge.c
+++ b/merge.c
@@ -44,8 +44,8 @@ int try_merge_command(const char *strategy, size_t xopts_nr,
        return ret;
 }
 
-int checkout_fast_forward(const unsigned char *head,
-                         const unsigned char *remote,
+int checkout_fast_forward(const struct object_id *head,
+                         const struct object_id *remote,
                          int overwrite_ignore)
 {
        struct tree *trees[MAX_UNPACK_TREES];
@@ -79,10 +79,10 @@ int checkout_fast_forward(const unsigned char *head,
        opts.fn = twoway_merge;
        setup_unpack_trees_porcelain(&opts, "merge");
 
-       trees[nr_trees] = parse_tree_indirect(head);
+       trees[nr_trees] = parse_tree_indirect(head->hash);
        if (!trees[nr_trees++])
                return -1;
-       trees[nr_trees] = parse_tree_indirect(remote);
+       trees[nr_trees] = parse_tree_indirect(remote->hash);
        if (!trees[nr_trees++])
                return -1;
        for (i = 0; i < nr_trees; i++) {
diff --git a/sequencer.c b/sequencer.c
index 9ca352ac7..dcc56a2b6 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -382,7 +382,7 @@ static int fast_forward_to(const struct object_id *to, 
const struct object_id *f
        struct strbuf err = STRBUF_INIT;
 
        read_cache();
-       if (checkout_fast_forward(from->hash, to->hash, 1))
+       if (checkout_fast_forward(from, to, 1))
                return -1; /* the callee should have complained already */
 
        strbuf_addf(&sb, _("%s: fast-forward"), _(action_name(opts)));