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Tue, 13 Feb 2024 00:41:56 -0800 (PST) Received: from [127.0.0.1] ([13.74.141.28]) by smtp.gmail.com with ESMTPSA id c14-20020adfe70e000000b0033afe6968bfsm8880523wrm.64.2024.02.13.00.41.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Feb 2024 00:41:56 -0800 (PST) Message-ID: <43c33e2eac4e5addc039ede6e3943de4cab4faee.1707813709.git.gitgitgadget@gmail.com> In-Reply-To: References: From: "Johannes Schindelin via GitGitGadget" Date: Tue, 13 Feb 2024 08:41:44 +0000 Subject: [PATCH 08/12] repo_get_merge_bases(): pass on errors from `merge_bases_many()` Fcc: Sent Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk X-Mailing-List: git@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 To: git@vger.kernel.org Cc: Johannes Schindelin , Johannes Schindelin From: Johannes Schindelin The `merge_bases_many()` function was just taught to indicate parsing errors, and now the `repo_get_merge_bases()` function (which is also surfaced via the `repo_get_merge_bases()` macro) is aware of that, too. Naturally, there are a lot of callers that need to be adjusted now, too. Next step: adjust the callers of `get_octopus_merge_bases()`. Signed-off-by: Johannes Schindelin --- builtin/log.c | 10 +++++----- builtin/merge-tree.c | 5 +++-- builtin/merge.c | 20 ++++++++++++-------- builtin/rebase.c | 8 +++++--- builtin/rev-parse.c | 5 +++-- commit-reach.c | 23 +++++++++++------------ commit-reach.h | 7 ++++--- diff-lib.c | 5 +++-- log-tree.c | 5 +++-- merge-ort.c | 6 +++++- merge-recursive.c | 4 +++- notes-merge.c | 3 ++- object-name.c | 5 +++-- revision.c | 10 ++++++---- sequencer.c | 8 ++++++-- submodule.c | 7 ++++++- t/t4301-merge-tree-write-tree.sh | 12 ++++++++++++ 17 files changed, 92 insertions(+), 51 deletions(-) diff --git a/builtin/log.c b/builtin/log.c index 1705da71aca..befafd6ae04 100644 --- a/builtin/log.c +++ b/builtin/log.c @@ -1702,11 +1702,11 @@ static struct commit *get_base_commit(const char *base_commit, */ while (rev_nr > 1) { for (i = 0; i < rev_nr / 2; i++) { - struct commit_list *merge_base; - merge_base = repo_get_merge_bases(the_repository, - rev[2 * i], - rev[2 * i + 1]); - if (!merge_base || merge_base->next) { + struct commit_list *merge_base = NULL; + if (repo_get_merge_bases(the_repository, + rev[2 * i], + rev[2 * i + 1], &merge_base) < 0 || + !merge_base || merge_base->next) { if (die_on_failure) { die(_("failed to find exact merge base")); } else { diff --git a/builtin/merge-tree.c b/builtin/merge-tree.c index a35e0452d66..76200250629 100644 --- a/builtin/merge-tree.c +++ b/builtin/merge-tree.c @@ -463,8 +463,9 @@ static int real_merge(struct merge_tree_options *o, * Get the merge bases, in reverse order; see comment above * merge_incore_recursive in merge-ort.h */ - merge_bases = repo_get_merge_bases(the_repository, parent1, - parent2); + if (repo_get_merge_bases(the_repository, parent1, + parent2, &merge_bases) < 0) + exit(128); if (!merge_bases && !o->allow_unrelated_histories) die(_("refusing to merge unrelated histories")); merge_bases = reverse_commit_list(merge_bases); diff --git a/builtin/merge.c b/builtin/merge.c index d748d46e135..ac9d58adc29 100644 --- a/builtin/merge.c +++ b/builtin/merge.c @@ -1517,10 +1517,13 @@ int cmd_merge(int argc, const char **argv, const char *prefix) if (!remoteheads) ; /* already up-to-date */ - else if (!remoteheads->next) - common = repo_get_merge_bases(the_repository, head_commit, - remoteheads->item); - else { + else if (!remoteheads->next) { + if (repo_get_merge_bases(the_repository, head_commit, + remoteheads->item, &common) < 0) { + ret = 2; + goto done; + } + } else { struct commit_list *list = remoteheads; commit_list_insert(head_commit, &list); common = get_octopus_merge_bases(list); @@ -1631,7 +1634,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix) struct commit_list *j; for (j = remoteheads; j; j = j->next) { - struct commit_list *common_one; + struct commit_list *common_one = NULL; struct commit *common_item; /* @@ -1639,9 +1642,10 @@ int cmd_merge(int argc, const char **argv, const char *prefix) * merge_bases again, otherwise "git merge HEAD^ * HEAD^^" would be missed. */ - common_one = repo_get_merge_bases(the_repository, - head_commit, - j->item); + if (repo_get_merge_bases(the_repository, head_commit, + j->item, &common_one) < 0) + exit(128); + common_item = common_one->item; free_commit_list(common_one); if (!oideq(&common_item->object.oid, &j->item->object.oid)) { diff --git a/builtin/rebase.c b/builtin/rebase.c index 043c65dccd9..06a55fc7325 100644 --- a/builtin/rebase.c +++ b/builtin/rebase.c @@ -879,7 +879,8 @@ static int can_fast_forward(struct commit *onto, struct commit *upstream, if (!upstream) goto done; - merge_bases = repo_get_merge_bases(the_repository, upstream, head); + if (repo_get_merge_bases(the_repository, upstream, head, &merge_bases) < 0) + exit(128); if (!merge_bases || merge_bases->next) goto done; @@ -898,8 +899,9 @@ static void fill_branch_base(struct rebase_options *options, { struct commit_list *merge_bases = NULL; - merge_bases = repo_get_merge_bases(the_repository, options->onto, - options->orig_head); + if (repo_get_merge_bases(the_repository, options->onto, + options->orig_head, &merge_bases) < 0) + exit(128); if (!merge_bases || merge_bases->next) oidcpy(branch_base, null_oid()); else diff --git a/builtin/rev-parse.c b/builtin/rev-parse.c index fde8861ca4e..c97d0f6144c 100644 --- a/builtin/rev-parse.c +++ b/builtin/rev-parse.c @@ -297,7 +297,7 @@ static int try_difference(const char *arg) show_rev(NORMAL, &end_oid, end); show_rev(symmetric ? NORMAL : REVERSED, &start_oid, start); if (symmetric) { - struct commit_list *exclude; + struct commit_list *exclude = NULL; struct commit *a, *b; a = lookup_commit_reference(the_repository, &start_oid); b = lookup_commit_reference(the_repository, &end_oid); @@ -305,7 +305,8 @@ static int try_difference(const char *arg) *dotdot = '.'; return 0; } - exclude = repo_get_merge_bases(the_repository, a, b); + if (repo_get_merge_bases(the_repository, a, b, &exclude) < 0) + exit(128); while (exclude) { struct commit *commit = pop_commit(&exclude); show_rev(REVERSED, &commit->object.oid, NULL); diff --git a/commit-reach.c b/commit-reach.c index 359853275a9..3471c933f6c 100644 --- a/commit-reach.c +++ b/commit-reach.c @@ -185,9 +185,12 @@ struct commit_list *get_octopus_merge_bases(struct commit_list *in) struct commit_list *new_commits = NULL, *end = NULL; for (j = ret; j; j = j->next) { - struct commit_list *bases; - bases = repo_get_merge_bases(the_repository, i->item, - j->item); + struct commit_list *bases = NULL; + if (repo_get_merge_bases(the_repository, i->item, + j->item, &bases) < 0) { + free_commit_list(bases); + return NULL; + } if (!new_commits) new_commits = bases; else @@ -472,16 +475,12 @@ struct commit_list *repo_get_merge_bases_many_dirty(struct repository *r, return result; } -struct commit_list *repo_get_merge_bases(struct repository *r, - struct commit *one, - struct commit *two) +int repo_get_merge_bases(struct repository *r, + struct commit *one, + struct commit *two, + struct commit_list **result) { - struct commit_list *result = NULL; - if (get_merge_bases_many_0(r, one, 1, &two, 1, &result) < 0) { - free_commit_list(result); - return NULL; - } - return result; + return get_merge_bases_many_0(r, one, 1, &two, 1, result); } /* diff --git a/commit-reach.h b/commit-reach.h index 68f81549a44..2c6fcdd34f6 100644 --- a/commit-reach.h +++ b/commit-reach.h @@ -9,9 +9,10 @@ struct ref_filter; struct object_id; struct object_array; -struct commit_list *repo_get_merge_bases(struct repository *r, - struct commit *rev1, - struct commit *rev2); +int repo_get_merge_bases(struct repository *r, + struct commit *rev1, + struct commit *rev2, + struct commit_list **result); struct commit_list *repo_get_merge_bases_many(struct repository *r, struct commit *one, int n, struct commit **twos); diff --git a/diff-lib.c b/diff-lib.c index 0e9ec4f68af..498224ccce2 100644 --- a/diff-lib.c +++ b/diff-lib.c @@ -565,7 +565,7 @@ void diff_get_merge_base(const struct rev_info *revs, struct object_id *mb) { int i; struct commit *mb_child[2] = {0}; - struct commit_list *merge_bases; + struct commit_list *merge_bases = NULL; for (i = 0; i < revs->pending.nr; i++) { struct object *obj = revs->pending.objects[i].item; @@ -592,7 +592,8 @@ void diff_get_merge_base(const struct rev_info *revs, struct object_id *mb) mb_child[1] = lookup_commit_reference(the_repository, &oid); } - merge_bases = repo_get_merge_bases(the_repository, mb_child[0], mb_child[1]); + if (repo_get_merge_bases(the_repository, mb_child[0], mb_child[1], &merge_bases) < 0) + exit(128); if (!merge_bases) die(_("no merge base found")); if (merge_bases->next) diff --git a/log-tree.c b/log-tree.c index 504da6b519e..4f337766a39 100644 --- a/log-tree.c +++ b/log-tree.c @@ -1010,7 +1010,7 @@ static int do_remerge_diff(struct rev_info *opt, struct object_id *oid) { struct merge_options o; - struct commit_list *bases; + struct commit_list *bases = NULL; struct merge_result res = {0}; struct pretty_print_context ctx = {0}; struct commit *parent1 = parents->item; @@ -1035,7 +1035,8 @@ static int do_remerge_diff(struct rev_info *opt, /* Parse the relevant commits and get the merge bases */ parse_commit_or_die(parent1); parse_commit_or_die(parent2); - bases = repo_get_merge_bases(the_repository, parent1, parent2); + if (repo_get_merge_bases(the_repository, parent1, parent2, &bases) < 0) + exit(128); /* Re-merge the parents */ merge_incore_recursive(&o, bases, parent1, parent2, &res); diff --git a/merge-ort.c b/merge-ort.c index 64e76afe89f..88f23a37f5a 100644 --- a/merge-ort.c +++ b/merge-ort.c @@ -5060,7 +5060,11 @@ static void merge_ort_internal(struct merge_options *opt, struct strbuf merge_base_abbrev = STRBUF_INIT; if (!merge_bases) { - merge_bases = repo_get_merge_bases(the_repository, h1, h2); + if (repo_get_merge_bases(the_repository, h1, h2, + &merge_bases) < 0) { + result->clean = -1; + return; + } /* See merge-ort.h:merge_incore_recursive() declaration NOTE */ merge_bases = reverse_commit_list(merge_bases); } diff --git a/merge-recursive.c b/merge-recursive.c index e3fe7803cbe..0bed0b97424 100644 --- a/merge-recursive.c +++ b/merge-recursive.c @@ -3632,7 +3632,9 @@ static int merge_recursive_internal(struct merge_options *opt, } if (!merge_bases) { - merge_bases = repo_get_merge_bases(the_repository, h1, h2); + if (repo_get_merge_bases(the_repository, h1, h2, + &merge_bases) < 0) + return -1; merge_bases = reverse_commit_list(merge_bases); } diff --git a/notes-merge.c b/notes-merge.c index 8799b522a55..51282934ae6 100644 --- a/notes-merge.c +++ b/notes-merge.c @@ -607,7 +607,8 @@ int notes_merge(struct notes_merge_options *o, assert(local && remote); /* Find merge bases */ - bases = repo_get_merge_bases(the_repository, local, remote); + if (repo_get_merge_bases(the_repository, local, remote, &bases) < 0) + exit(128); if (!bases) { base_oid = null_oid(); base_tree_oid = the_hash_algo->empty_tree; diff --git a/object-name.c b/object-name.c index 0bfa29dbbfe..89c34f9b49e 100644 --- a/object-name.c +++ b/object-name.c @@ -1481,7 +1481,7 @@ int repo_get_oid_mb(struct repository *r, struct object_id *oid) { struct commit *one, *two; - struct commit_list *mbs; + struct commit_list *mbs = NULL; struct object_id oid_tmp; const char *dots; int st; @@ -1509,7 +1509,8 @@ int repo_get_oid_mb(struct repository *r, two = lookup_commit_reference_gently(r, &oid_tmp, 0); if (!two) return -1; - mbs = repo_get_merge_bases(r, one, two); + if (repo_get_merge_bases(r, one, two, &mbs) < 0) + return -1; if (!mbs || mbs->next) st = -1; else { diff --git a/revision.c b/revision.c index 00d5c29bfce..3492cc95159 100644 --- a/revision.c +++ b/revision.c @@ -1965,7 +1965,7 @@ static void add_pending_commit_list(struct rev_info *revs, static void prepare_show_merge(struct rev_info *revs) { - struct commit_list *bases; + struct commit_list *bases = NULL; struct commit *head, *other; struct object_id oid; const char **prune = NULL; @@ -1980,7 +1980,8 @@ static void prepare_show_merge(struct rev_info *revs) other = lookup_commit_or_die(&oid, "MERGE_HEAD"); add_pending_object(revs, &head->object, "HEAD"); add_pending_object(revs, &other->object, "MERGE_HEAD"); - bases = repo_get_merge_bases(the_repository, head, other); + if (repo_get_merge_bases(the_repository, head, other, &bases) < 0) + exit(128); add_rev_cmdline_list(revs, bases, REV_CMD_MERGE_BASE, UNINTERESTING | BOTTOM); add_pending_commit_list(revs, bases, UNINTERESTING | BOTTOM); free_commit_list(bases); @@ -2068,14 +2069,15 @@ static int handle_dotdot_1(const char *arg, char *dotdot, } else { /* A...B -- find merge bases between the two */ struct commit *a, *b; - struct commit_list *exclude; + struct commit_list *exclude = NULL; a = lookup_commit_reference(revs->repo, &a_obj->oid); b = lookup_commit_reference(revs->repo, &b_obj->oid); if (!a || !b) return dotdot_missing(arg, dotdot, revs, symmetric); - exclude = repo_get_merge_bases(the_repository, a, b); + if (repo_get_merge_bases(the_repository, a, b, &exclude) < 0) + return -1; add_rev_cmdline_list(revs, exclude, REV_CMD_MERGE_BASE, flags_exclude); add_pending_commit_list(revs, exclude, flags_exclude); diff --git a/sequencer.c b/sequencer.c index d584cac8ed9..4417f2f1956 100644 --- a/sequencer.c +++ b/sequencer.c @@ -3913,7 +3913,7 @@ static int do_merge(struct repository *r, int run_commit_flags = 0; struct strbuf ref_name = STRBUF_INIT; struct commit *head_commit, *merge_commit, *i; - struct commit_list *bases, *j; + struct commit_list *bases = NULL, *j; struct commit_list *to_merge = NULL, **tail = &to_merge; const char *strategy = !opts->xopts.nr && (!opts->strategy || @@ -4139,7 +4139,11 @@ static int do_merge(struct repository *r, } merge_commit = to_merge->item; - bases = repo_get_merge_bases(r, head_commit, merge_commit); + if (repo_get_merge_bases(r, head_commit, merge_commit, &bases) < 0) { + ret = -1; + goto leave_merge; + } + if (bases && oideq(&merge_commit->object.oid, &bases->item->object.oid)) { ret = 0; diff --git a/submodule.c b/submodule.c index e603a19a876..04931a5474b 100644 --- a/submodule.c +++ b/submodule.c @@ -595,7 +595,12 @@ static void show_submodule_header(struct diff_options *o, (!is_null_oid(two) && !*right)) message = "(commits not present)"; - *merge_bases = repo_get_merge_bases(sub, *left, *right); + *merge_bases = NULL; + if (repo_get_merge_bases(sub, *left, *right, merge_bases) < 0) { + message = "(corrupt repository)"; + goto output_header; + } + if (*merge_bases) { if ((*merge_bases)->item == *left) fast_forward = 1; diff --git a/t/t4301-merge-tree-write-tree.sh b/t/t4301-merge-tree-write-tree.sh index b2c8a43fce3..5d1e7aca4c8 100755 --- a/t/t4301-merge-tree-write-tree.sh +++ b/t/t4301-merge-tree-write-tree.sh @@ -945,4 +945,16 @@ test_expect_success 'check the input format when --stdin is passed' ' test_cmp expect actual ' +test_expect_success 'error out on missing commits as well' ' + git init --bare missing-commit.git && + git rev-list --objects side1 side3 >list-including-initial && + grep -v ^$(git rev-parse side1^) list && + git pack-objects missing-commit.git/objects/pack/missing-initial actual && + test_must_be_empty actual +' + test_done -- gitgitgadget