static struct commit *get_ref(const unsigned char *sha1, const char *name)
{
struct object *object;
object = deref_tag(parse_object(sha1), name, strlen(name));
if (!object)
return NULL;
if (object->type == OBJ_TREE)
return make_virtual_commit((struct tree*)object, name);
if (object->type != OBJ_COMMIT)
return NULL;
if (parse_commit((struct commit *)object))
return NULL;
return (struct commit *)object;
}
static struct commit *get_ref(const char *ref)
{
unsigned char sha1[20];
struct object *object;
if (get_sha1(ref, sha1))
die("Could not resolve ref '%s'", ref);
object = deref_tag(parse_object(sha1), ref, strlen(ref));
if (!object)
return NULL;
if (object->type == OBJ_TREE)
return make_virtual_commit((struct tree*)object,
better_branch_name(ref));
if (object->type != OBJ_COMMIT)
return NULL;
if (parse_commit((struct commit *)object))
die("Could not parse commit '%s'", sha1_to_hex(object->sha1));
return (struct commit *)object;
}
/*
* Merge the commits h1 and h2, return the resulting virtual
* commit object and a flag indicating the cleanness of the merge.
*/
int merge_recursive(struct merge_options *o,
struct commit *h1,
struct commit *h2,
struct commit_list *ca,
struct commit **result)
{
struct commit_list *iter;
struct commit *merged_common_ancestors;
struct tree *mrtree = mrtree;
int clean;
if (show(o, 4)) {
output(o, 4, "Merging:");
output_commit_title(o, h1);
output_commit_title(o, h2);
}
if (!ca) {
ca = get_merge_bases(h1, h2, 1);
ca = reverse_commit_list(ca);
}
if (show(o, 5)) {
output(o, 5, "found %u common ancestor(s):", commit_list_count(ca));
for (iter = ca; iter; iter = iter->next)
output_commit_title(o, iter->item);
}
merged_common_ancestors = pop_commit(&ca);
if (merged_common_ancestors == NULL) {
/* if there is no common ancestor, make an empty tree */
struct tree *tree = xcalloc(1, sizeof(struct tree));
tree->object.parsed = 1;
tree->object.type = OBJ_TREE;
pretend_sha1_file(NULL, 0, OBJ_TREE, tree->object.sha1);
merged_common_ancestors = make_virtual_commit(tree, "ancestor");
}
for (iter = ca; iter; iter = iter->next) {
const char *saved_b1, *saved_b2;
o->call_depth++;
/*
* When the merge fails, the result contains files
* with conflict markers. The cleanness flag is
* ignored, it was never actually used, as result of
* merge_trees has always overwritten it: the committed
* "conflicts" were already resolved.
*/
discard_cache();
saved_b1 = o->branch1;
saved_b2 = o->branch2;
o->branch1 = "Temporary merge branch 1";
o->branch2 = "Temporary merge branch 2";
merge_recursive(o, merged_common_ancestors, iter->item,
NULL, &merged_common_ancestors);
o->branch1 = saved_b1;
o->branch2 = saved_b2;
o->call_depth--;
if (!merged_common_ancestors)
die("merge returned no commit");
}
discard_cache();
if (!o->call_depth)
read_cache();
clean = merge_trees(o, h1->tree, h2->tree, merged_common_ancestors->tree,
&mrtree);
if (o->call_depth) {
*result = make_virtual_commit(mrtree, "merged tree");
commit_list_insert(h1, &(*result)->parents);
commit_list_insert(h2, &(*result)->parents->next);
}
flush_output(o);
return clean;
}
