From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christian Couder Subject: [PATCH] bisect: display first bad commit without forking a new process Date: Wed, 27 May 2009 07:23:53 +0200 Message-ID: <20090527052354.3824.22018.chriscool@tuxfamily.org> Cc: git@vger.kernel.org To: Junio C Hamano X-From: git-owner@vger.kernel.org Wed May 27 07:28:41 2009 Return-path: Envelope-to: gcvg-git-2@gmane.org Received: from vger.kernel.org ([209.132.176.167]) by lo.gmane.org with esmtp (Exim 4.50) id 1M9Bgu-0006w3-Eo for gcvg-git-2@gmane.org; Wed, 27 May 2009 07:28:40 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759590AbZE0F2O (ORCPT ); Wed, 27 May 2009 01:28:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758415AbZE0F2N (ORCPT ); Wed, 27 May 2009 01:28:13 -0400 Received: from smtp5-g21.free.fr ([212.27.42.5]:52346 "EHLO smtp5-g21.free.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755763AbZE0F2M (ORCPT ); Wed, 27 May 2009 01:28:12 -0400 Received: from smtp5-g21.free.fr (localhost [127.0.0.1]) by smtp5-g21.free.fr (Postfix) with ESMTP id D938DD4807D; Wed, 27 May 2009 07:28:08 +0200 (CEST) Received: from bureau.boubyland (gre92-7-82-243-130-161.fbx.proxad.net [82.243.130.161]) by smtp5-g21.free.fr (Postfix) with ESMTP id E550BD4801C; Wed, 27 May 2009 07:28:05 +0200 (CEST) X-git-sha1: c60cb01718130aaa07b2e1f3bef90a597320aea2 X-Mailer: git-mail-commits v0.4.5 Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Archived-At: Previously "git diff-tree --pretty COMMIT" was run using "run_command_v_opt" to display information about the first bad commit. The goal of this patch is to avoid a "fork" and an "exec" call when displaying that information. To do that, we manually setup revision information as "git diff-tree --pretty" would do it, and then use the "log_tree_commit" function. Signed-off-by: Christian Couder --- bisect.c | 30 +++++++++++++++++++++++++++--- 1 files changed, 27 insertions(+), 3 deletions(-) diff --git a/bisect.c b/bisect.c index c43c120..e94a77b 100644 --- a/bisect.c +++ b/bisect.c @@ -7,6 +7,7 @@ #include "quote.h" #include "sha1-lookup.h" #include "run-command.h" +#include "log-tree.h" #include "bisect.h" struct sha1_array { @@ -27,7 +28,6 @@ struct argv_array { int argv_alloc; }; -static const char *argv_diff_tree[] = {"diff-tree", "--pretty", NULL, NULL}; static const char *argv_checkout[] = {"checkout", "-q", NULL, "--", NULL}; static const char *argv_show_branch[] = {"show-branch", NULL, NULL}; @@ -816,6 +816,31 @@ static void check_good_are_ancestors_of_bad(const char *prefix) } /* + * This does "git diff-tree --pretty COMMIT" without one fork+exec. + */ +static void show_diff_tree(const char *prefix, struct commit *commit) +{ + static struct rev_info opt; + + /* diff-tree init */ + init_revisions(&opt, prefix); + git_config(git_diff_basic_config, NULL); /* no "diff" UI options */ + opt.abbrev = 0; + opt.diff = 1; + + /* This is what "--pretty" does */ + opt.verbose_header = 1; + opt.use_terminator = 0; + opt.commit_format = CMIT_FMT_DEFAULT; + + /* diff-tree init */ + if (!opt.diffopt.output_format) + opt.diffopt.output_format = DIFF_FORMAT_RAW; + + log_tree_commit(&opt, commit); +} + +/* * We use the convention that exiting with an exit code 10 means that * the bisection process finished successfully. * In this case the calling shell script should exit 0. @@ -860,8 +885,7 @@ int bisect_next_all(const char *prefix) if (!hashcmp(bisect_rev, current_bad_sha1)) { exit_if_skipped_commits(tried, current_bad_sha1); printf("%s is first bad commit\n", bisect_rev_hex); - argv_diff_tree[2] = bisect_rev_hex; - run_command_v_opt(argv_diff_tree, RUN_GIT_CMD); + show_diff_tree(prefix, revs.commits->item); /* This means the bisection process succeeded. */ exit(10); } -- 1.6.3.GIT