From dbfeddb12e5bb540ed3c852eebda3df9117bd150 Mon Sep 17 00:00:00 2001 From: Chris Rorvick Date: Thu, 29 Nov 2012 19:41:37 -0600 Subject: [PATCH] push: require force for refs under refs/tags/ References are allowed to update from one commit-ish to another if the former is an ancestor of the latter. This behavior is oriented to branches which are expected to move with commits. Tag references are expected to be static in a repository, though, thus an update to something under refs/tags/ should be rejected unless the update is forced. Signed-off-by: Chris Rorvick Signed-off-by: Junio C Hamano --- Documentation/git-push.txt | 11 ++++++----- builtin/push.c | 2 +- builtin/send-pack.c | 5 +++++ cache.h | 1 + remote.c | 18 ++++++++++++++---- send-pack.c | 1 + t/t5516-fetch-push.sh | 23 ++++++++++++++++++++++- transport-helper.c | 6 ++++++ transport.c | 8 ++++++-- 9 files changed, 62 insertions(+), 13 deletions(-) diff --git a/Documentation/git-push.txt b/Documentation/git-push.txt index fe46c4258..09bdec75b 100644 --- a/Documentation/git-push.txt +++ b/Documentation/git-push.txt @@ -51,11 +51,12 @@ be named. If `:` is omitted, the same ref as will be updated. + The object referenced by is used to update the reference -on the remote side, but by default this is only allowed if the -update can fast-forward . By having the optional leading `+`, -you can tell git to update the ref even when the update is not a -fast-forward. This does *not* attempt to merge into . See -EXAMPLES below for details. +on the remote side. By default this is only allowed if is not +under refs/tags/, and then only if it can fast-forward . By having +the optional leading `+`, you can tell git to update the ref even +if it is not allowed by default (e.g., it is not a fast-forward.) This +does *not* attempt to merge into . See EXAMPLES below for +details. + `tag ` means the same as `refs/tags/:refs/tags/`. + diff --git a/builtin/push.c b/builtin/push.c index e08485d12..83a3cc80c 100644 --- a/builtin/push.c +++ b/builtin/push.c @@ -222,7 +222,7 @@ static const char message_advice_checkout_pull_push[] = static const char message_advice_ref_already_exists[] = N_("Updates were rejected because the destination reference already exists\n" - "in the remote and the update is not a fast-forward."); + "in the remote."); static void advise_pull_before_push(void) { diff --git a/builtin/send-pack.c b/builtin/send-pack.c index 9f986077a..f849e0a4a 100644 --- a/builtin/send-pack.c +++ b/builtin/send-pack.c @@ -44,6 +44,11 @@ static void print_helper_status(struct ref *ref) msg = "non-fast forward"; break; + case REF_STATUS_REJECT_ALREADY_EXISTS: + res = "error"; + msg = "already exists"; + break; + case REF_STATUS_REJECT_NODELETE: case REF_STATUS_REMOTE_REJECT: res = "error"; diff --git a/cache.h b/cache.h index b7ab4ac62..a32a0ea91 100644 --- a/cache.h +++ b/cache.h @@ -1011,6 +1011,7 @@ struct ref { REF_STATUS_NONE = 0, REF_STATUS_OK, REF_STATUS_REJECT_NONFASTFORWARD, + REF_STATUS_REJECT_ALREADY_EXISTS, REF_STATUS_REJECT_NODELETE, REF_STATUS_UPTODATE, REF_STATUS_REMOTE_REJECT, diff --git a/remote.c b/remote.c index 4a6f82208..012b52f6f 100644 --- a/remote.c +++ b/remote.c @@ -1315,14 +1315,18 @@ void set_ref_status_for_push(struct ref *remote_refs, int send_mirror, * * (1) if the old thing does not exist, it is OK. * - * (2) if you do not have the old thing, you are not allowed + * (2) if the destination is under refs/tags/ you are + * not allowed to overwrite it; tags are expected + * to be static once created + * + * (3) if you do not have the old thing, you are not allowed * to overwrite it; you would not know what you are losing * otherwise. * - * (3) if both new and old are commit-ish, and new is a + * (4) if both new and old are commit-ish, and new is a * descendant of old, it is OK. * - * (4) regardless of all of the above, removing :B is + * (5) regardless of all of the above, removing :B is * always allowed. */ @@ -1337,7 +1341,13 @@ void set_ref_status_for_push(struct ref *remote_refs, int send_mirror, !has_sha1_file(ref->old_sha1) || !ref_newer(ref->new_sha1, ref->old_sha1); - if (ref->nonfastforward) { + if (ref->not_forwardable) { + ref->requires_force = 1; + if (!force_ref_update) { + ref->status = REF_STATUS_REJECT_ALREADY_EXISTS; + continue; + } + } else if (ref->nonfastforward) { ref->requires_force = 1; if (!force_ref_update) { ref->status = REF_STATUS_REJECT_NONFASTFORWARD; diff --git a/send-pack.c b/send-pack.c index f50dfd9f4..1c375f0a2 100644 --- a/send-pack.c +++ b/send-pack.c @@ -229,6 +229,7 @@ int send_pack(struct send_pack_args *args, /* Check for statuses set by set_ref_status_for_push() */ switch (ref->status) { case REF_STATUS_REJECT_NONFASTFORWARD: + case REF_STATUS_REJECT_ALREADY_EXISTS: case REF_STATUS_UPTODATE: continue; default: diff --git a/t/t5516-fetch-push.sh b/t/t5516-fetch-push.sh index b5417cc95..8f024a08f 100755 --- a/t/t5516-fetch-push.sh +++ b/t/t5516-fetch-push.sh @@ -368,7 +368,7 @@ test_expect_success 'push with colon-less refspec (2)' ' git branch -D frotz fi && git tag -f frotz && - git push testrepo frotz && + git push -f testrepo frotz && check_push_result $the_commit tags/frotz && check_push_result $the_first_commit heads/frotz @@ -929,6 +929,27 @@ test_expect_success 'push into aliased refs (inconsistent)' ' ) ' +test_expect_success 'push requires --force to update lightweight tag' ' + mk_test heads/master && + mk_child child1 && + mk_child child2 && + ( + cd child1 && + git tag Tag && + git push ../child2 Tag && + git push ../child2 Tag && + >file1 && + git add file1 && + git commit -m "file1" && + git tag -f Tag && + test_must_fail git push ../child2 Tag && + git push --force ../child2 Tag && + git tag -f Tag && + test_must_fail git push ../child2 Tag HEAD~ && + git push --force ../child2 Tag + ) +' + test_expect_success 'push --porcelain' ' mk_empty && echo >.git/foo "To testrepo" && diff --git a/transport-helper.c b/transport-helper.c index 4713b6930..965b778cb 100644 --- a/transport-helper.c +++ b/transport-helper.c @@ -661,6 +661,11 @@ static void push_update_ref_status(struct strbuf *buf, free(msg); msg = NULL; } + else if (!strcmp(msg, "already exists")) { + status = REF_STATUS_REJECT_ALREADY_EXISTS; + free(msg); + msg = NULL; + } } if (*ref) @@ -720,6 +725,7 @@ static int push_refs_with_push(struct transport *transport, /* Check for statuses set by set_ref_status_for_push() */ switch (ref->status) { case REF_STATUS_REJECT_NONFASTFORWARD: + case REF_STATUS_REJECT_ALREADY_EXISTS: case REF_STATUS_UPTODATE: continue; default: diff --git a/transport.c b/transport.c index f3160b142..2673d273f 100644 --- a/transport.c +++ b/transport.c @@ -695,6 +695,10 @@ static int print_one_push_status(struct ref *ref, const char *dest, int count, i print_ref_status('!', "[rejected]", ref, ref->peer_ref, "non-fast-forward", porcelain); break; + case REF_STATUS_REJECT_ALREADY_EXISTS: + print_ref_status('!', "[rejected]", ref, ref->peer_ref, + "already exists", porcelain); + break; case REF_STATUS_REMOTE_REJECT: print_ref_status('!', "[remote rejected]", ref, ref->deletion ? NULL : ref->peer_ref, @@ -740,12 +744,12 @@ void transport_print_push_status(const char *dest, struct ref *refs, ref->status != REF_STATUS_OK) n += print_one_push_status(ref, dest, n, porcelain); if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) { - if (ref->not_forwardable) - *reject_reasons |= REJECT_ALREADY_EXISTS; if (!strcmp(head, ref->name)) *reject_reasons |= REJECT_NON_FF_HEAD; else *reject_reasons |= REJECT_NON_FF_OTHER; + } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) { + *reject_reasons |= REJECT_ALREADY_EXISTS; } } } -- 2.26.2