From 160b81ed819d870b7d098bf61b51c4bc959507f3 Mon Sep 17 00:00:00 2001 From: Pang Yan Han Date: Wed, 28 Sep 2011 23:39:35 +0800 Subject: [PATCH] receive-pack: don't pass non-existent refs to post-{receive,update} hooks When a push specifies deletion of non-existent refs, the post post-receive and post-update hooks receive them as input/arguments. For instance, for the following push, where refs/heads/nonexistent is a ref which does not exist on the remote side: git push origin :refs/heads/nonexistent the post-receive hook receives from standard input: SP SP refs/heads/nonexistent and the post-update hook receives as arguments: refs/heads/nonexistent which does not make sense since it is a no-op. Teach receive-pack not to pass non-existent refs to the post-receive and post-update hooks. If the push only attempts to delete non-existent refs, these hooks are not even called. The update and pre-receive hooks are still notified about attempted deletion of non-existent refs to give them a chance to inspect the situation and act on it. [jc: mild fix-ups to avoid introducing an extra list; also added fixes to some tests] Signed-off-by: Pang Yan Han Signed-off-by: Junio C Hamano --- builtin/receive-pack.c | 18 ++-- refs.c | 2 +- refs.h | 2 +- t/t5516-fetch-push.sh | 197 +++++++++++++++++++++++++++++++++++++++++ 4 files changed, 211 insertions(+), 8 deletions(-) diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c index ae164da4d5..b73f18a57b 100644 --- a/builtin/receive-pack.c +++ b/builtin/receive-pack.c @@ -147,7 +147,8 @@ static void write_head_info(void) struct command { struct command *next; const char *error_string; - unsigned int skip_update; + unsigned int skip_update:1, + did_not_exist:1; unsigned char old_sha1[20]; unsigned char new_sha1[20]; char ref_name[FLEX_ARRAY]; /* more */ @@ -215,7 +216,7 @@ static int run_receive_hook(struct command *commands, const char *hook_name) int have_input = 0, code; for (cmd = commands; !have_input && cmd; cmd = cmd->next) { - if (!cmd->error_string) + if (!cmd->error_string && !cmd->did_not_exist) have_input = 1; } @@ -248,7 +249,7 @@ static int run_receive_hook(struct command *commands, const char *hook_name) } for (cmd = commands; cmd; cmd = cmd->next) { - if (!cmd->error_string) { + if (!cmd->error_string && !cmd->did_not_exist) { size_t n = snprintf(buf, sizeof(buf), "%s %s %s\n", sha1_to_hex(cmd->old_sha1), sha1_to_hex(cmd->new_sha1), @@ -445,8 +446,13 @@ static const char *update(struct command *cmd) if (is_null_sha1(new_sha1)) { if (!parse_object(old_sha1)) { - rp_warning("Allowing deletion of corrupt ref."); old_sha1 = NULL; + if (ref_exists(name)) { + rp_warning("Allowing deletion of corrupt ref."); + } else { + rp_warning("Deleting a non-existent ref."); + cmd->did_not_exist = 1; + } } if (delete_ref(namespaced_name, old_sha1, 0)) { rp_error("failed to delete %s", name); @@ -477,7 +483,7 @@ static void run_update_post_hook(struct command *commands) struct child_process proc; for (argc = 0, cmd = commands; cmd; cmd = cmd->next) { - if (cmd->error_string) + if (cmd->error_string || cmd->did_not_exist) continue; argc++; } @@ -488,7 +494,7 @@ static void run_update_post_hook(struct command *commands) for (argc = 1, cmd = commands; cmd; cmd = cmd->next) { char *p; - if (cmd->error_string) + if (cmd->error_string || cmd->did_not_exist) continue; p = xmalloc(strlen(cmd->ref_name) + 1); strcpy(p, cmd->ref_name); diff --git a/refs.c b/refs.c index a615043b34..43e9225cd6 100644 --- a/refs.c +++ b/refs.c @@ -1851,7 +1851,7 @@ int update_ref(const char *action, const char *refname, return 0; } -int ref_exists(char *refname) +int ref_exists(const char *refname) { unsigned char sha1[20]; return !!resolve_ref(refname, sha1, 1, NULL); diff --git a/refs.h b/refs.h index dfb086e933..4431205338 100644 --- a/refs.h +++ b/refs.h @@ -57,7 +57,7 @@ extern void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refn */ extern void add_extra_ref(const char *refname, const unsigned char *sha1, int flags); extern void clear_extra_refs(void); -extern int ref_exists(char *); +extern int ref_exists(const char *); extern int peel_ref(const char *, unsigned char *); diff --git a/t/t5516-fetch-push.sh b/t/t5516-fetch-push.sh index 3abb2907ea..b69cf574d7 100755 --- a/t/t5516-fetch-push.sh +++ b/t/t5516-fetch-push.sh @@ -40,6 +40,40 @@ mk_test () { ) } +mk_test_with_hooks() { + mk_test "$@" && + ( + cd testrepo && + mkdir .git/hooks && + cd .git/hooks && + + cat >pre-receive <<-'EOF' && + #!/bin/sh + cat - >>pre-receive.actual + EOF + + cat >update <<-'EOF' && + #!/bin/sh + printf "%s %s %s\n" "$@" >>update.actual + EOF + + cat >post-receive <<-'EOF' && + #!/bin/sh + cat - >>post-receive.actual + EOF + + cat >post-update <<-'EOF' && + #!/bin/sh + for ref in "$@" + do + printf "%s\n" "$ref" >>post-update.actual + done + EOF + + chmod +x pre-receive update post-receive post-update + ) +} + mk_child() { rm -rf "$1" && git clone testrepo "$1" @@ -559,6 +593,169 @@ test_expect_success 'allow deleting an invalid remote ref' ' ' +test_expect_success 'pushing valid refs triggers post-receive and post-update hooks' ' + mk_test_with_hooks heads/master heads/next && + orgmaster=$(cd testrepo && git show-ref -s --verify refs/heads/master) && + newmaster=$(git show-ref -s --verify refs/heads/master) && + orgnext=$(cd testrepo && git show-ref -s --verify refs/heads/next) && + newnext=$_z40 && + git push testrepo refs/heads/master:refs/heads/master :refs/heads/next && + ( + cd testrepo/.git && + cat >pre-receive.expect <<-EOF && + $orgmaster $newmaster refs/heads/master + $orgnext $newnext refs/heads/next + EOF + + cat >update.expect <<-EOF && + refs/heads/master $orgmaster $newmaster + refs/heads/next $orgnext $newnext + EOF + + cat >post-receive.expect <<-EOF && + $orgmaster $newmaster refs/heads/master + $orgnext $newnext refs/heads/next + EOF + + cat >post-update.expect <<-EOF && + refs/heads/master + refs/heads/next + EOF + + test_cmp pre-receive.expect pre-receive.actual && + test_cmp update.expect update.actual && + test_cmp post-receive.expect post-receive.actual && + test_cmp post-update.expect post-update.actual + ) +' + +test_expect_success 'deleting dangling ref triggers hooks with correct args' ' + mk_test_with_hooks heads/master && + rm -f testrepo/.git/objects/??/* && + git push testrepo :refs/heads/master && + ( + cd testrepo/.git && + cat >pre-receive.expect <<-EOF && + $_z40 $_z40 refs/heads/master + EOF + + cat >update.expect <<-EOF && + refs/heads/master $_z40 $_z40 + EOF + + cat >post-receive.expect <<-EOF && + $_z40 $_z40 refs/heads/master + EOF + + cat >post-update.expect <<-EOF && + refs/heads/master + EOF + + test_cmp pre-receive.expect pre-receive.actual && + test_cmp update.expect update.actual && + test_cmp post-receive.expect post-receive.actual && + test_cmp post-update.expect post-update.actual + ) +' + +test_expect_success 'deletion of a non-existent ref is not fed to post-receive and post-update hooks' ' + mk_test_with_hooks heads/master && + orgmaster=$(cd testrepo && git show-ref -s --verify refs/heads/master) && + newmaster=$(git show-ref -s --verify refs/heads/master) && + git push testrepo master :refs/heads/nonexistent && + ( + cd testrepo/.git && + cat >pre-receive.expect <<-EOF && + $orgmaster $newmaster refs/heads/master + $_z40 $_z40 refs/heads/nonexistent + EOF + + cat >update.expect <<-EOF && + refs/heads/master $orgmaster $newmaster + refs/heads/nonexistent $_z40 $_z40 + EOF + + cat >post-receive.expect <<-EOF && + $orgmaster $newmaster refs/heads/master + EOF + + cat >post-update.expect <<-EOF && + refs/heads/master + EOF + + test_cmp pre-receive.expect pre-receive.actual && + test_cmp update.expect update.actual && + test_cmp post-receive.expect post-receive.actual && + test_cmp post-update.expect post-update.actual + ) +' + +test_expect_success 'deletion of a non-existent ref alone does trigger post-receive and post-update hooks' ' + mk_test_with_hooks heads/master && + git push testrepo :refs/heads/nonexistent && + ( + cd testrepo/.git && + cat >pre-receive.expect <<-EOF && + $_z40 $_z40 refs/heads/nonexistent + EOF + + cat >update.expect <<-EOF && + refs/heads/nonexistent $_z40 $_z40 + EOF + + test_cmp pre-receive.expect pre-receive.actual && + test_cmp update.expect update.actual && + test_path_is_missing post-receive.actual && + test_path_is_missing post-update.actual + ) +' + +test_expect_success 'mixed ref updates, deletes, invalid deletes trigger hooks with correct input' ' + mk_test_with_hooks heads/master heads/next heads/pu && + orgmaster=$(cd testrepo && git show-ref -s --verify refs/heads/master) && + newmaster=$(git show-ref -s --verify refs/heads/master) && + orgnext=$(cd testrepo && git show-ref -s --verify refs/heads/next) && + newnext=$_z40 && + orgpu=$(cd testrepo && git show-ref -s --verify refs/heads/pu) && + newpu=$(git show-ref -s --verify refs/heads/master) && + git push testrepo refs/heads/master:refs/heads/master \ + refs/heads/master:refs/heads/pu :refs/heads/next \ + :refs/heads/nonexistent && + ( + cd testrepo/.git && + cat >pre-receive.expect <<-EOF && + $orgmaster $newmaster refs/heads/master + $orgnext $newnext refs/heads/next + $orgpu $newpu refs/heads/pu + $_z40 $_z40 refs/heads/nonexistent + EOF + + cat >update.expect <<-EOF && + refs/heads/master $orgmaster $newmaster + refs/heads/next $orgnext $newnext + refs/heads/pu $orgpu $newpu + refs/heads/nonexistent $_z40 $_z40 + EOF + + cat >post-receive.expect <<-EOF && + $orgmaster $newmaster refs/heads/master + $orgnext $newnext refs/heads/next + $orgpu $newpu refs/heads/pu + EOF + + cat >post-update.expect <<-EOF && + refs/heads/master + refs/heads/next + refs/heads/pu + EOF + + test_cmp pre-receive.expect pre-receive.actual && + test_cmp update.expect update.actual && + test_cmp post-receive.expect post-receive.actual && + test_cmp post-update.expect post-update.actual + ) +' + test_expect_success 'allow deleting a ref using --delete' ' mk_test heads/master && (cd testrepo && git config receive.denyDeleteCurrent warn) &&