git-tar-tree: don't RUN_SETUP

diff --git a/receive-pack.c b/receive-pack.c
index 81e91909b8ac88423c550a6489285b003378c5f0..ea2dbd4e3398ca90823dcd453cbb52c5dcea135c 100644 (file)
--- a/receive-pack.c
+++ b/receive-pack.c
@@ -2,7 +2,8 @@
 #include "refs.h"
 #include "pkt-line.h"
 #include "run-command.h"
-#include <sys/wait.h>
+#include "commit.h"
+#include "object.h"
 
 static const char receive_pack_usage[] = "git-receive-pack <git-dir>";
 
@@ -128,6 +129,21 @@ 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");
+       }
        safe_create_leading_directories(lock_name);
 
        newfd = open(lock_name, O_CREAT | O_EXCL | O_WRONLY, 0666);
@@ -247,8 +263,8 @@ static void read_head_info(void)
                                report_status = 1;
                }
                cmd = xmalloc(sizeof(struct command) + len - 80);
-               memcpy(cmd->old_sha1, old_sha1, 20);
-               memcpy(cmd->new_sha1, new_sha1, 20);
+               hashcpy(cmd->old_sha1, old_sha1);
+               hashcpy(cmd->new_sha1, new_sha1);
                memcpy(cmd->ref_name, line + 82, len - 81);
                cmd->error_string = "n/a (unpacker error)";
                cmd->next = NULL;