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Tue, 11 Aug 2026 10:54:30 -0700 (PDT) Received: from denethor.localdomain ([136.51.44.64]) by smtp.gmail.com with ESMTPSA id 5614622812f47-4b2001331d2sm1241489b6e.11.2026.08.11.10.54.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 Aug 2026 10:54:29 -0700 (PDT) From: Justin Tobler To: git@vger.kernel.org Cc: ps@pks.im, gitster@pobox.com, Justin Tobler Subject: [PATCH v3 6/9] builtin/receive-pack: report unpack errors via strbuf Date: Tue, 11 Aug 2026 12:54:12 -0500 Message-ID: <20260811175415.2044235-7-jltobler@gmail.com> X-Mailer: git-send-email 2.55.0.424.g13c7afec21 In-Reply-To: <20260811175415.2044235-1-jltobler@gmail.com> References: <20260809190106.1565882-1-jltobler@gmail.com> <20260811175415.2044235-1-jltobler@gmail.com> Precedence: bulk X-Mailing-List: git@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit When writing packfiles via `unpack()`, error messages are returned directly by the function. In preparation for `unpack()` logic being moved behind a generic ODB transaction interface, update the function to instead write any error messages to a caller provided strbuf and return a negative value on error. Call sites are updated to use the error strbuf accordingly. Signed-off-by: Justin Tobler --- builtin/receive-pack.c | 63 ++++++++++++++++++++++++------------------ 1 file changed, 36 insertions(+), 27 deletions(-) diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c index f062b93b8d..6df872697b 100644 --- a/builtin/receive-pack.c +++ b/builtin/receive-pack.c @@ -2015,7 +2015,7 @@ static void execute_commands_atomic(struct command *commands, } static void execute_commands(struct command *commands, - const char *unpacker_error, + int unpacker_error, struct shallow_info *si, struct odb_transaction *transaction, const struct string_list *push_options) @@ -2340,8 +2340,8 @@ struct unpack_opts { int quiet; }; -static const char *unpack(struct odb_transaction *transaction, - const struct unpack_opts *opts) +static int unpack(struct odb_transaction *transaction, struct strbuf *err_msg, + const struct unpack_opts *opts) { struct pack_header hdr; const char *hdr_err; @@ -2353,7 +2353,8 @@ static const char *unpack(struct odb_transaction *transaction, if (hdr_err) { if (err_fd > 0) close(err_fd); - return hdr_err; + strbuf_addstr(err_msg, hdr_err); + return -1; } if (opts->shallow_file) { @@ -2378,8 +2379,10 @@ static const char *unpack(struct odb_transaction *transaction, child.err = err_fd; child.git_cmd = 1; status = run_command(&child); - if (status) - return "unpack-objects abnormal exit"; + if (status) { + strbuf_addstr(err_msg, "unpack-objects abnormal exit"); + return -1; + } } else { char hostname[HOST_NAME_MAX + 1]; char *lockfile; @@ -2410,8 +2413,10 @@ static const char *unpack(struct odb_transaction *transaction, child.err = err_fd; child.git_cmd = 1; status = start_command(&child); - if (status) - return "index-pack fork failed"; + if (status) { + strbuf_addstr(err_msg, "index-pack fork failed"); + return -1; + } /* * The lockfile filepath is expected to be the final location of @@ -2427,15 +2432,18 @@ static const char *unpack(struct odb_transaction *transaction, close(child.out); status = finish_command(&child); - if (status) - return "index-pack abnormal exit"; + if (status) { + strbuf_addstr(err_msg, "index-pack abnormal exit"); + return -1; + } odb_reprepare(the_repository->objects); } - return NULL; + return 0; } -static const char *unpack_with_sideband(struct odb_transaction *transaction, - const char *shallow_file) +static int unpack_with_sideband(struct odb_transaction *transaction, + const char *shallow_file, + struct strbuf *err_msg) { struct unpack_opts opts = { .fsck_objects = (receive_fsck_objects >= 0 @@ -2450,20 +2458,20 @@ static const char *unpack_with_sideband(struct odb_transaction *transaction, .quiet = quiet, }; struct async muxer; - const char *ret; + int ret; if (!use_sideband) - return unpack(transaction, &opts); + return unpack(transaction, err_msg, &opts); use_keepalive = KEEPALIVE_AFTER_NUL; memset(&muxer, 0, sizeof(muxer)); muxer.proc = copy_to_sideband; muxer.in = -1; if (start_async(&muxer)) - return NULL; + return 0; opts.err_fd = muxer.in; - ret = unpack(transaction, &opts); + ret = unpack(transaction, err_msg, &opts); finish_async(&muxer); return ret; @@ -2552,13 +2560,13 @@ static void update_shallow_info(struct command *commands, free(ref_status); } -static void report(struct command *commands, const char *unpack_status) +static void report(struct command *commands, const struct strbuf *unpack_status) { struct command *cmd; struct strbuf buf = STRBUF_INIT; packet_buf_write(&buf, "unpack %s\n", - unpack_status ? unpack_status : "ok"); + unpack_status->len ? unpack_status->buf : "ok"); for (cmd = commands; cmd; cmd = cmd->next) { if (!cmd->error_string) packet_buf_write(&buf, "ok %s\n", @@ -2576,14 +2584,14 @@ static void report(struct command *commands, const char *unpack_status) strbuf_release(&buf); } -static void report_v2(struct command *commands, const char *unpack_status) +static void report_v2(struct command *commands, const struct strbuf *unpack_status) { struct command *cmd; struct strbuf buf = STRBUF_INIT; struct ref_push_report *report; packet_buf_write(&buf, "unpack %s\n", - unpack_status ? unpack_status : "ok"); + unpack_status->len ? unpack_status->buf : "ok"); for (cmd = commands; cmd; cmd = cmd->next) { int count = 0; @@ -2707,8 +2715,8 @@ int cmd_receive_pack(int argc, PACKET_READ_DIE_ON_ERR_PACKET); if ((commands = read_head_info(&reader, &shallow))) { - const char *unpack_status = NULL; struct string_list push_options = STRING_LIST_INIT_DUP; + struct strbuf unpack_status = STRBUF_INIT; if (use_push_options) read_push_options(&reader, &push_options); @@ -2728,22 +2736,22 @@ int cmd_receive_pack(int argc, alt_shallow_file = setup_temporary_shallow(si.shallow); if (odb_transaction_begin(the_repository->objects, &transaction, ODB_TRANSACTION_RECEIVE)) - unpack_status = "unable to start object transaction"; + strbuf_addstr(&unpack_status, "unable to start object transaction"); else - unpack_status = unpack_with_sideband(transaction, alt_shallow_file); + unpack_with_sideband(transaction, alt_shallow_file, &unpack_status); update_shallow_info(commands, &si, &ref, alt_shallow_file); } use_keepalive = KEEPALIVE_ALWAYS; - execute_commands(commands, unpack_status, &si, transaction, + execute_commands(commands, !!unpack_status.len, &si, transaction, &push_options); odb_transaction_finalize(transaction); delete_tempfile(&pack_lockfile); sigchain_push(SIGPIPE, SIG_IGN); if (report_status_v2) - report_v2(commands, unpack_status); + report_v2(commands, &unpack_status); else if (report_status) - report(commands, unpack_status); + report(commands, &unpack_status); sigchain_pop(SIGPIPE); run_receive_hook(commands, "post-receive", 1, NULL, &push_options); @@ -2768,6 +2776,7 @@ int cmd_receive_pack(int argc, if (auto_update_server_info) update_server_info(the_repository, 0); clear_shallow_info(&si); + strbuf_release(&unpack_status); } if (use_sideband) packet_flush(1); -- 2.55.0.424.g13c7afec21