diff options
| -rw-r--r-- | builtin-receive-pack.c | 68 | ||||
| -rwxr-xr-x | t/t5516-fetch-push.sh | 49 |
2 files changed, 113 insertions, 4 deletions
diff --git a/builtin-receive-pack.c b/builtin-receive-pack.c index fffb6eac8..bb34757d2 100644 --- a/builtin-receive-pack.c +++ b/builtin-receive-pack.c @@ -9,6 +9,7 @@ #include "object.h" #include "remote.h" #include "transport.h" +#include "string-list.h" static const char receive_pack_usage[] = "git receive-pack <git-dir>"; @@ -129,6 +130,7 @@ static void write_head_info(void) struct command { struct command *next; const char *error_string; + unsigned int skip_update; unsigned char old_sha1[20]; unsigned char new_sha1[20]; char ref_name[FLEX_ARRAY]; /* more */ @@ -486,6 +488,63 @@ static void run_update_post_hook(struct command *commands) } } +static void check_aliased_update(struct command *cmd, struct string_list *list) +{ + struct string_list_item *item; + struct command *dst_cmd; + unsigned char sha1[20]; + char cmd_oldh[41], cmd_newh[41], dst_oldh[41], dst_newh[41]; + int flag; + + const char *dst_name = resolve_ref(cmd->ref_name, sha1, 0, &flag); + + if (!(flag & REF_ISSYMREF)) + return; + + if ((item = string_list_lookup(dst_name, list)) == NULL) + return; + + cmd->skip_update = 1; + + dst_cmd = (struct command *) item->util; + + if (!hashcmp(cmd->old_sha1, dst_cmd->old_sha1) && + !hashcmp(cmd->new_sha1, dst_cmd->new_sha1)) + return; + + dst_cmd->skip_update = 1; + + strcpy(cmd_oldh, find_unique_abbrev(cmd->old_sha1, DEFAULT_ABBREV)); + strcat(cmd_newh, find_unique_abbrev(cmd->new_sha1, DEFAULT_ABBREV)); + strcpy(dst_oldh, find_unique_abbrev(dst_cmd->old_sha1, DEFAULT_ABBREV)); + strcat(dst_newh, find_unique_abbrev(dst_cmd->new_sha1, DEFAULT_ABBREV)); + rp_error("refusing inconsistent update between symref '%s' (%s..%s) and" + " its target '%s' (%s..%s)", + cmd->ref_name, cmd_oldh, cmd_newh, + dst_cmd->ref_name, dst_oldh, dst_newh); + + cmd->error_string = dst_cmd->error_string = + "inconsistent aliased update"; +} + +static void check_aliased_updates(struct command *commands) +{ + struct command *cmd; + struct string_list ref_list = { NULL, 0, 0, 0 }; + + for (cmd = commands; cmd; cmd = cmd->next) { + struct string_list_item *item = + string_list_append(cmd->ref_name, &ref_list); + item->util = (void *)cmd; + } + sort_string_list(&ref_list); + + for (cmd = commands; cmd; cmd = cmd->next) + check_aliased_update(cmd, &ref_list); + + string_list_clear(&ref_list, 0); +} + static void execute_commands(struct command *commands, const char *unpacker_error) { struct command *cmd; @@ -503,10 +562,13 @@ static void execute_commands(struct command *commands, const char *unpacker_erro return; } + check_aliased_updates(commands); + head_name = resolve_ref("HEAD", sha1, 0, NULL); for (cmd = commands; cmd; cmd = cmd->next) - cmd->error_string = update(cmd); + if (!cmd->skip_update) + cmd->error_string = update(cmd); } static struct command *read_head_info(void) @@ -541,12 +603,10 @@ static struct command *read_head_info(void) if (strstr(refname + reflen + 1, "side-band-64k")) use_sideband = LARGE_PACKET_MAX; } - cmd = xmalloc(sizeof(struct command) + len - 80); + cmd = xcalloc(1, sizeof(struct command) + len - 80); hashcpy(cmd->old_sha1, old_sha1); hashcpy(cmd->new_sha1, new_sha1); memcpy(cmd->ref_name, line + 82, len - 81); - cmd->error_string = NULL; - cmd->next = NULL; *p = cmd; p = &cmd->next; } diff --git a/t/t5516-fetch-push.sh b/t/t5516-fetch-push.sh index 0f04b2e89..0f98332d5 100755 --- a/t/t5516-fetch-push.sh +++ b/t/t5516-fetch-push.sh @@ -660,4 +660,53 @@ test_expect_success 'push with branches containing #' ' git checkout master ' +test_expect_success 'push into aliased refs (consistent)' ' + mk_test heads/master && + mk_child child1 && + mk_child child2 && + ( + cd child1 && + git branch foo && + git symbolic-ref refs/heads/bar refs/heads/foo + git config receive.denyCurrentBranch false + ) && + ( + cd child2 && + >path2 && + git add path2 && + test_tick && + git commit -a -m child2 && + git branch foo && + git branch bar && + git push ../child1 foo bar + ) +' + +test_expect_success 'push into aliased refs (inconsistent)' ' + mk_test heads/master && + mk_child child1 && + mk_child child2 && + ( + cd child1 && + git branch foo && + git symbolic-ref refs/heads/bar refs/heads/foo + git config receive.denyCurrentBranch false + ) && + ( + cd child2 && + >path2 && + git add path2 && + test_tick && + git commit -a -m child2 && + git branch foo && + >path3 && + git add path3 && + test_tick && + git commit -a -m child2 && + git branch bar && + test_must_fail git push ../child1 foo bar 2>stderr && + grep "refusing inconsistent update" stderr + ) +' + test_done |