receive-pack: check connectivity before concluding "git push"

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index e1a687ad0761e46f6ec95659bb585b9014d4abf4..42f712318faf994efb0038c1036d934b5d279e9e 100644 (file)
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -11,6 +11,7 @@
 #include "transport.h"
 #include "string-list.h"
 #include "sha1-array.h"
+#include "connected.h"
 
 static const char receive_pack_usage[] = "git receive-pack <git-dir>";
 
@@ -546,6 +547,43 @@ static void check_aliased_updates(struct command *commands)
        string_list_clear(&ref_list, 0);
 }
 
+static int command_singleton_iterator(void *cb_data, unsigned char sha1[20])
+{
+       struct command **cmd_list = cb_data;
+       struct command *cmd = *cmd_list;
+
+       if (!cmd)
+               return -1; /* end of list */
+       *cmd_list = NULL; /* this returns only one */
+       hashcpy(sha1, cmd->new_sha1);
+       return 0;
+}
+
+static void set_connectivity_errors(struct command *commands)
+{
+       struct command *cmd;
+
+       for (cmd = commands; cmd; cmd = cmd->next) {
+               struct command *singleton = cmd;
+               if (!check_everything_connected(command_singleton_iterator,
+                                               0, &singleton))
+                       continue;
+               cmd->error_string = "missing necessary objects";
+       }
+}
+
+static int iterate_receive_command_list(void *cb_data, unsigned char sha1[20])
+{
+       struct command **cmd_list = cb_data;
+       struct command *cmd = *cmd_list;
+
+       if (!cmd)
+               return -1; /* end of list */
+       *cmd_list = cmd->next;
+       hashcpy(sha1, cmd->new_sha1);
+       return 0;
+}
+
 static void execute_commands(struct command *commands, const char *unpacker_error)
 {
        struct command *cmd;
@@ -557,6 +595,11 @@ static void execute_commands(struct command *commands, const char *unpacker_erro
                return;
        }
 
+       cmd = commands;
+       if (check_everything_connected(iterate_receive_command_list,
+                                      0, &cmd))
+               set_connectivity_errors(commands);
+
        if (run_receive_hook(commands, pre_receive_hook)) {
                for (cmd = commands; cmd; cmd = cmd->next)
                        cmd->error_string = "pre-receive hook declined";