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From: Junio C Hamano <gitster@pobox•com>
To: Duy Nguyen <pclouds@gmail•com>
Cc: Git Mailing List <git@vger•kernel.org>,
	Eric Sunshine <sunshine@sunshineco•com>
Subject: Re: [PATCH] ls-files: do not trust stat info if lstat() fails
Date: Mon, 07 Apr 2014 10:13:31 -0700	[thread overview]
Message-ID: <xmqqzjjxm5ac.fsf@gitster.dls.corp.google.com> (raw)
In-Reply-To: <CACsJy8CTv5jZKjqq6fAJeVj-sqJHAF761V6TofVWs-V5GPnbcA@mail.gmail.com> (Duy Nguyen's message of "Sat, 5 Apr 2014 15:03:31 +0700")

Duy Nguyen <pclouds@gmail•com> writes:

>>> Or even better to show an error message when the error code is
>>> unexpected? The unkown tag '!' says "there are problems" but if it
>>> shows up sort of permanently, '!' won't help much, I think.
>>
>> I am OK with that approach, but then one question remains: should we
>> say it is deleted, modified, both, or neither?
>
> The question is moot if the user does not ignore stderr because they
> should just ignore those error-reported entries. If they do
> 2>/dev/null, I think we should err on the safe side and say modified.
> We only say deleted if lstat() returns ENOENT or ENOTDIR like in your
> patch.

Doesn't the same reasoning behind "when we do not know for sure that
a path is not modified, it would be safe if we said the path may be
modified" also tell us that it is safer to say a path may be lost if
we cannot tell?

One likely case where we cannot tell if it is modified would be when
we cannot read the path (perhaps the parent directory accidentally
lost its x-bit).  Saying "it may be modified" would be one way to
have the user take notice, for an interactive user.  A script that
runs ls-files may be using the paths to drive "git add", "tar cf -",
etc. and emitting such an unreadable path is one way to make these
downstream commands signal that something fishy is going on by
erroring out.

So, I am not sure if we should be silent on an unexpected error when
we are asked to report deletes when we would be vocal when we are
asked to report modifications.

  reply	other threads:[~2014-04-07 17:13 UTC|newest]

Thread overview: 79+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-03-20 10:15 [PATCH/RFC 0/8] git-ls Nguyễn Thái Ngọc Duy
2014-03-20 10:15 ` [PATCH 1/8] Import $LS_COLORS parsing code from coreutils Nguyễn Thái Ngọc Duy
2014-03-20 19:09   ` David Tran
2014-03-21 11:54     ` Duy Nguyen
2014-03-21 20:01       ` David Tran
2014-03-20 10:15 ` [PATCH 2/8] ls_colors.c: a bit of document on print_color_indicator input Nguyễn Thái Ngọc Duy
2014-03-20 10:15 ` [PATCH 3/8] ls_colors.c: enable coloring on u+x files Nguyễn Thái Ngọc Duy
2014-03-20 11:46   ` Matthieu Moy
2014-03-20 12:14     ` Duy Nguyen
2014-03-20 17:41       ` Junio C Hamano
2014-03-21 11:52         ` Duy Nguyen
2014-03-20 10:15 ` [PATCH 4/8] ls_colors.c: new color descriptors Nguyễn Thái Ngọc Duy
2014-03-20 10:15 ` [PATCH 5/8] ls-files: add --color to highlight based on $LS_COLORS Nguyễn Thái Ngọc Duy
2014-03-20 10:15 ` [PATCH 6/8] ls-files: add --column Nguyễn Thái Ngọc Duy
2014-03-25 11:34   ` Matthieu Moy
2014-03-20 10:15 ` [PATCH 7/8] ls-files: support --max-depth Nguyễn Thái Ngọc Duy
2014-03-25  8:55   ` Matthieu Moy
2014-03-25 11:15     ` Duy Nguyen
2014-03-27 14:36       ` Duy Nguyen
2014-03-28 13:52       ` Matthieu Moy
2014-03-28 14:15         ` Duy Nguyen
2014-03-28 14:38           ` Duy Nguyen
2014-03-20 10:15 ` [PATCH 8/8] Add git-ls, a user friendly version of ls-files and more Nguyễn Thái Ngọc Duy
2014-03-20 11:56   ` Matthieu Moy
2014-03-26 13:48 ` [PATCH v2 00/17] git-ls Nguyễn Thái Ngọc Duy
2014-03-26 13:48   ` [PATCH v2 01/17] ls_colors.c: add $LS_COLORS parsing code Nguyễn Thái Ngọc Duy
2014-03-26 13:48   ` [PATCH v2 02/17] ls_colors.c: parse color.ls.* from config file Nguyễn Thái Ngọc Duy
2014-03-26 13:48   ` [PATCH v2 03/17] ls_colors.c: add function to color a file name Nguyễn Thái Ngọc Duy
2014-03-26 19:14     ` Eric Sunshine
2014-03-26 13:48   ` [PATCH v2 04/17] ls_colors.c: highlight submodules like directories Nguyễn Thái Ngọc Duy
2014-03-26 13:48   ` [PATCH v2 05/17] ls-files: buffer full item in strbuf before printing Nguyễn Thái Ngọc Duy
2014-03-26 19:22     ` Eric Sunshine
2014-03-26 23:18       ` Duy Nguyen
2014-03-27  5:22         ` Eric Sunshine
2014-03-26 13:48   ` [PATCH v2 06/17] ls-files: add --color to highlight file names Nguyễn Thái Ngọc Duy
2014-03-26 19:13     ` Eric Sunshine
2014-03-26 23:15       ` Duy Nguyen
2014-03-28  0:49         ` Eric Sunshine
2014-03-26 13:48   ` [PATCH v2 07/17] ls-files: add --column Nguyễn Thái Ngọc Duy
2014-03-26 19:46     ` Eric Sunshine
2014-03-26 13:48   ` [PATCH v2 08/17] ls-files: support --max-depth Nguyễn Thái Ngọc Duy
2014-03-26 19:50     ` Eric Sunshine
2014-03-26 13:48   ` [PATCH v2 09/17] ls-files: split main ls-files logic into ls_files() function Nguyễn Thái Ngọc Duy
2014-03-26 13:48   ` [PATCH v2 10/17] Add git-ls, a user friendly version of ls-files and more Nguyễn Thái Ngọc Duy
2014-03-26 20:16     ` Eric Sunshine
2014-03-26 13:48   ` [PATCH v2 11/17] ls: -u does not imply showing stages Nguyễn Thái Ngọc Duy
2014-03-26 13:48   ` [PATCH v2 12/17] ls: add -R/--recursive short for --max-depth=-1 Nguyễn Thái Ngọc Duy
2014-03-26 13:48   ` [PATCH v2 13/17] ls: add -1 short for --no-column in the spirit of GNU ls Nguyễn Thái Ngọc Duy
2014-03-28  3:52     ` Eric Sunshine
2014-03-26 13:48   ` [PATCH v2 14/17] ls: add -t back Nguyễn Thái Ngọc Duy
2014-03-26 13:48   ` [PATCH v2 15/17] ls: sort output and remove duplicates Nguyễn Thái Ngọc Duy
2014-03-26 13:48   ` [PATCH v2 16/17] ls: do not show duplicate cached entries Nguyễn Thái Ngọc Duy
2014-03-28  4:04     ` Eric Sunshine
2014-03-28 13:18       ` [PATCH] ls-files: do not trust stat info if lstat() fails Nguyễn Thái Ngọc Duy
2014-04-02 18:15         ` Junio C Hamano
2014-04-03 12:40           ` Duy Nguyen
2014-04-03 16:30             ` Junio C Hamano
2014-04-05  8:03               ` Duy Nguyen
2014-04-07 17:13                 ` Junio C Hamano [this message]
2014-03-26 13:48   ` [PATCH v2 17/17] ls: show directories as well as files Nguyễn Thái Ngọc Duy
2014-03-30 13:55   ` [PATCH v3 00/18] git-ls Nguyễn Thái Ngọc Duy
2014-03-30 13:55     ` [PATCH v3 01/18] ls_colors.c: add $LS_COLORS parsing code Nguyễn Thái Ngọc Duy
2014-03-30 13:55     ` [PATCH v3 02/18] ls_colors.c: parse color.ls.* from config file Nguyễn Thái Ngọc Duy
2014-03-30 13:55     ` [PATCH v3 03/18] ls_colors.c: add a function to color a file name Nguyễn Thái Ngọc Duy
2014-03-30 13:55     ` [PATCH v3 04/18] ls_colors.c: highlight submodules like directories Nguyễn Thái Ngọc Duy
2014-03-30 13:55     ` [PATCH v3 05/18] ls-files: buffer full item in strbuf before printing Nguyễn Thái Ngọc Duy
2014-03-30 13:55     ` [PATCH v3 06/18] ls-files: add --color to highlight file names Nguyễn Thái Ngọc Duy
2014-03-30 13:55     ` [PATCH v3 07/18] ls-files: add --column Nguyễn Thái Ngọc Duy
2014-03-30 13:55     ` [PATCH v3 08/18] ls-files: support --max-depth Nguyễn Thái Ngọc Duy
2014-03-30 13:56     ` [PATCH v3 09/18] Add git-list-files, a user friendly version of ls-files and more Nguyễn Thái Ngọc Duy
2014-03-30 13:56     ` [PATCH v3 10/18] list-files: -u does not imply showing stages Nguyễn Thái Ngọc Duy
2014-03-30 13:56     ` [PATCH v3 11/18] list-files: add -R/--recursive short for --max-depth=-1 Nguyễn Thái Ngọc Duy
2014-03-30 13:56     ` [PATCH v3 12/18] list-files: add -1 short for --no-column Nguyễn Thái Ngọc Duy
2014-03-30 13:56     ` [PATCH v3 13/18] list-files: add -t back Nguyễn Thái Ngọc Duy
2014-03-30 13:56     ` [PATCH v3 14/18] list-files: sort output and remove duplicates Nguyễn Thái Ngọc Duy
2014-03-30 13:56     ` [PATCH v3 15/18] list-files: do not show duplicate cached entries Nguyễn Thái Ngọc Duy
2014-03-30 13:56     ` [PATCH v3 16/18] list-files: show directories as well as files Nguyễn Thái Ngọc Duy
2014-03-30 13:56     ` [PATCH v3 17/18] list-files: add -F/--classify Nguyễn Thái Ngọc Duy
2014-03-30 13:56     ` [PATCH v3 18/18] list-files -F: show submodules with the new indicator '&' Nguyễn Thái Ngọc Duy

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