From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?q?Nguy=E1=BB=85n=20Th=C3=A1i=20Ng=E1=BB=8Dc=20Duy?= Subject: [PATCH v2 19/22] update-index: test the system before enabling untracked cache Date: Sat, 8 Nov 2014 16:39:52 +0700 Message-ID: <1415439595-469-20-git-send-email-pclouds@gmail.com> References: <1414411846-4450-1-git-send-email-pclouds@gmail.com> <1415439595-469-1-git-send-email-pclouds@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: =?UTF-8?q?Nguy=E1=BB=85n=20Th=C3=A1i=20Ng=E1=BB=8Dc=20Duy?= To: git@vger.kernel.org X-From: git-owner@vger.kernel.org Sat Nov 08 10:41:34 2014 Return-path: Envelope-to: gcvg-git-2@plane.gmane.org Received: from vger.kernel.org ([209.132.180.67]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Xn2WU-0001ib-3g for gcvg-git-2@plane.gmane.org; Sat, 08 Nov 2014 10:41:34 +0100 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753698AbaKHJl3 convert rfc822-to-quoted-printable (ORCPT ); Sat, 8 Nov 2014 04:41:29 -0500 Received: from mail-pa0-f51.google.com ([209.85.220.51]:59728 "EHLO mail-pa0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753680AbaKHJl1 (ORCPT ); Sat, 8 Nov 2014 04:41:27 -0500 Received: by mail-pa0-f51.google.com with SMTP id kq14so5122071pab.10 for ; Sat, 08 Nov 2014 01:41:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-type:content-transfer-encoding; bh=Gjmq0YzrPvbZuYGuPB1j7F8XujCtcbUrtZIw7+WfB3U=; b=LIeY5RrlXCR/VVwpsGNdRmEZ1f3OUmD9q4ek9O1q/Rzr/2bv+QvSReFhonnhxpZEzm 8uCVaYEPoJ5qZJE/ix4kutxwwuSwQB8//RfK1c87L9WFnCB1w447SarO+C1eikdrA1oP TRd4uStN/Nps5cpqDZo5gDO9GyuawC6gPfExq+Ubg8eI30WaA7YZQn84D+ZSsC7ivpBT q59ihbL1kVd0HBmGUttw14fdY9KhLiEXRYnS9CuKVKM9Rus5ZctxzYpopF5X4pGo+Vld snnUkFTJxSdps5Qmy4tS1W8IFQdUgHZLwkWcwTmTEj0+CHMJqMmm+G6k/pUm7p4zGI/0 5f8w== X-Received: by 10.70.93.65 with SMTP id cs1mr18204639pdb.80.1415439686651; Sat, 08 Nov 2014 01:41:26 -0800 (PST) Received: from lanh ([115.73.197.54]) by mx.google.com with ESMTPSA id xf9sm11107229pab.2.2014.11.08.01.41.24 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 08 Nov 2014 01:41:26 -0800 (PST) Received: by lanh (sSMTP sendmail emulation); Sat, 08 Nov 2014 16:41:40 +0700 X-Mailer: git-send-email 2.1.0.rc0.78.gc0d8480 In-Reply-To: <1415439595-469-1-git-send-email-pclouds@gmail.com> Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Helped-by: Eric Sunshine Signed-off-by: Nguy=E1=BB=85n Th=C3=A1i Ng=E1=BB=8Dc Duy --- Documentation/git-update-index.txt | 6 ++ builtin/update-index.c | 148 +++++++++++++++++++++++++++++= ++++++++ 2 files changed, 154 insertions(+) diff --git a/Documentation/git-update-index.txt b/Documentation/git-upd= ate-index.txt index f9a35cd..ed32bae 100644 --- a/Documentation/git-update-index.txt +++ b/Documentation/git-update-index.txt @@ -180,6 +180,12 @@ may not support it yet. system must change `st_mtime` field of a directory if files are added or deleted in that directory. =20 +--force-untracked-cache:: + For safety, `--untracked-cache` performs tests on the working + directory to make sure untracked cache can be used. These + tests can take a few seconds. `--force-untracked-cache` can be + used to skip the tests. + \--:: Do not interpret any more arguments as options. =20 diff --git a/builtin/update-index.c b/builtin/update-index.c index 3d2dedd..f23ec83 100644 --- a/builtin/update-index.c +++ b/builtin/update-index.c @@ -47,6 +47,147 @@ static void report(const char *fmt, ...) va_end(vp); } =20 +static void remove_test_directory(void) +{ + struct strbuf sb =3D STRBUF_INIT; + strbuf_addstr(&sb, "dir-mtime-test"); + remove_dir_recursively(&sb, 0); + strbuf_release(&sb); +} + +static void xmkdir(const char *path) +{ + if (mkdir(path, 0700)) + die_errno(_("failed to create directory %s"), path); +} + +static int xstat(const char *path, struct stat *st) +{ + if (stat(path, st)) + die_errno(_("failed to stat %s"), path); + return 0; +} + +static int create_file(const char *path) +{ + int fd =3D open(path, O_CREAT | O_RDWR, 0644); + if (fd < 0) + die_errno(_("failed to create file %s"), path); + return fd; +} + +static void xunlink(const char *path) +{ + if (unlink(path)) + die_errno(_("failed to delete file %s"), path); +} + +static void xrmdir(const char *path) +{ + if (rmdir(path)) + die_errno(_("failed to delete directory %s"), path); +} + +static void avoid_racy(void) +{ + /* + * not use if we could usleep(10) if USE_NSEC is defined. The + * field nsec could be there, but the OS could choose to + * ignore it? + */ + sleep(1); +} + +static int test_if_untracked_cache_is_supported(void) +{ + struct stat st; + struct stat_data base; + int fd; + + fprintf(stderr, _("Testing ")); + xmkdir("dir-mtime-test"); + atexit(remove_test_directory); + xstat("dir-mtime-test", &st); + fill_stat_data(&base, &st); + fputc('.', stderr); + + avoid_racy(); + fd =3D create_file("dir-mtime-test/newfile"); + xstat("dir-mtime-test", &st); + if (!match_stat_data(&base, &st)) { + close(fd); + fputc('\n', stderr); + fprintf_ln(stderr,_("directory stat info does not " + "change after adding a new file")); + return 0; + } + fill_stat_data(&base, &st); + fputc('.', stderr); + + avoid_racy(); + xmkdir("dir-mtime-test/new-dir"); + xstat("dir-mtime-test", &st); + if (!match_stat_data(&base, &st)) { + close(fd); + fputc('\n', stderr); + fprintf_ln(stderr, _("directory stat info does not change " + "after adding a new directory")); + return 0; + } + fill_stat_data(&base, &st); + fputc('.', stderr); + + avoid_racy(); + write_or_die(fd, "data", 4); + close(fd); + xstat("dir-mtime-test", &st); + if (match_stat_data(&base, &st)) { + fputc('\n', stderr); + fprintf_ln(stderr, _("directory stat info changes " + "after updating a file")); + return 0; + } + fputc('.', stderr); + + avoid_racy(); + close(create_file("dir-mtime-test/new-dir/new")); + xstat("dir-mtime-test", &st); + if (match_stat_data(&base, &st)) { + fputc('\n', stderr); + fprintf_ln(stderr, _("directory stat info changes after " + "adding a file inside subdirectory")); + return 0; + } + fputc('.', stderr); + + avoid_racy(); + xunlink("dir-mtime-test/newfile"); + xstat("dir-mtime-test", &st); + if (!match_stat_data(&base, &st)) { + fputc('\n', stderr); + fprintf_ln(stderr, _("directory stat info does not " + "change after deleting a file")); + return 0; + } + fill_stat_data(&base, &st); + fputc('.', stderr); + + avoid_racy(); + xunlink("dir-mtime-test/new-dir/new"); + xrmdir("dir-mtime-test/new-dir"); + xstat("dir-mtime-test", &st); + if (!match_stat_data(&base, &st)) { + fputc('\n', stderr); + fprintf_ln(stderr, _("directory stat info does not " + "change after deleting a directory")); + return 0; + } + + xrmdir("dir-mtime-test"); + fprintf_ln(stderr, _(" OK")); + return 1; +} + static int mark_ce_flags(const char *path, int flag, int mark) { int namelen =3D strlen(path); @@ -834,6 +975,8 @@ int cmd_update_index(int argc, const char **argv, c= onst char *prefix) N_("enable or disable split index")), OPT_BOOL(0, "untracked-cache", &untracked_cache, N_("enable/disable untracked cache")), + OPT_SET_INT(0, "force-untracked-cache", &untracked_cache, + N_("enable untracked cache without testing the filesystem"), 2)= , OPT_END() }; =20 @@ -943,6 +1086,11 @@ int cmd_update_index(int argc, const char **argv,= const char *prefix) if (untracked_cache > 0 && !the_index.untracked) { struct untracked_cache *uc; =20 + if (untracked_cache < 2) { + setup_work_tree(); + if (!test_if_untracked_cache_is_supported()) + return 1; + } uc =3D xcalloc(1, sizeof(*uc)); uc->exclude_per_dir =3D ".gitignore"; /* should be the same flags used by git-status */ --=20 2.1.0.rc0.78.gc0d8480