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Diffstat (limited to 'receive-pack.c')
-rw-r--r--receive-pack.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/receive-pack.c b/receive-pack.c
index c8aacbb..1fcf3a9 100644
--- a/receive-pack.c
+++ b/receive-pack.c
@@ -2,6 +2,8 @@
#include "refs.h"
#include "pkt-line.h"
#include "run-command.h"
+#include "commit.h"
+#include "object.h"
static const char receive_pack_usage[] = "git-receive-pack <git-dir>";
@@ -94,6 +96,21 @@ static int update(struct command *cmd)
return error("unpack should have generated %s, "
"but I can't find it!", new_hex);
}
+ if (deny_non_fast_forwards && !is_null_sha1(old_sha1)) {
+ struct commit *old_commit, *new_commit;
+ struct commit_list *bases, *ent;
+
+ old_commit = (struct commit *)parse_object(old_sha1);
+ new_commit = (struct commit *)parse_object(new_sha1);
+ bases = get_merge_bases(old_commit, new_commit, 1);
+ for (ent = bases; ent; ent = ent->next)
+ if (!hashcmp(old_sha1, ent->item->object.sha1))
+ break;
+ free_commit_list(bases);
+ if (!ent)
+ return error("denying non-fast forward;"
+ " you should pull first");
+ }
if (run_update_hook(name, old_hex, new_hex)) {
cmd->error_string = "hook declined";
return error("hook declined to update %s", name);