From: Junio C Hamano <gitster@pobox.com>
To: Taylor Blau <me@ttaylorr.com>
Cc: "Martin Ågren" <martin.agren@gmail.com>,
"Phillip Wood" <phillip.wood@dunelm.org.uk>,
"Git Mailing List" <git@vger.kernel.org>,
"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>,
"René Scharfe" <l.s.r@web.de>,
"Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>,
"Jeff King" <peff@peff.net>,
"Eric Sunshine" <sunshine@sunshineco.com>
Subject: Re: [PATCH v5 5/7] builtin/grep.c: add '--column' option to 'git-grep(1)'
Date: Sat, 12 May 2018 15:07:04 +0900 [thread overview]
Message-ID: <xmqq7eo9flvb.fsf@gitster-ct.c.googlers.com> (raw)
In-Reply-To: <20180512051902.GA70598@syl.local> (Taylor Blau's message of "Fri, 11 May 2018 22:19:02 -0700")
Taylor Blau <me@ttaylorr.com> writes:
> I re-read your note and understand more clearly now what your suggestion
> is. To ensure that we're in agreement, do you mean:
>
> 1. '--column -v' will _never_ give a column, but will never die(),
> either
No, I don't.
> 2. '--column --[and | or | not]' will never give a column, but will
> also never die(), either.
No, I don't.
If a file does not have substring "foo", then
git grep -v -e foo file
git grep --not -e foo file
would hit all lines, just like
git grep -e '.*' file
does.
I would expect that all of these
git grep --column/-o -v -e foo file
git grep --column/-o --not -e foo file
git grep --column/-o -e '.*' file
give the same output, which is what we would get if we consider the
hit from "choose lines that lack 'foo'" on a line without 'foo' is
caused by the entire contents on the line. That is in line with
"choose lines that has anything (including nothing)" aka ".*" would
result in the entire line being reported via -o. The byte offset of
the first hit on such a line reported by --column is also 1, and
that is a good and real answer to the question "git grep --column/-o"
can give.
In an earlier message, you sounded like you do not think "we did not
have 'foo' on that line, and that is why we are emitting because we
are operating under -v" lack a definite answer for --column, but I
think you are wrong. "On the entire line, we didn't find 'foo'
anywhere" is good enough reason for me to make the answer "the
entire line contributed to this hit" a definite one.
Exactly the same applies for "git grep --not -e foo".
When "git grep -e bar [--or] --not -e foo" shows a line because the
line has 'bar' on it, we have --column that points at 'b' of the
first 'bar' on the line. When it shows a line because the line has
neither 'bar' or 'foo', then "--not -e foo" part would give a
definite "the entire line contributed to this decision that it does
not have 'foo'".
next prev parent reply other threads:[~2018-05-12 6:07 UTC|newest]
Thread overview: 108+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1524281843.git.me@ttaylorr.com>
2018-04-21 3:45 ` [PATCH 1/6] grep.c: take regmatch_t as argument in match_line() Taylor Blau
2018-04-22 20:47 ` [PATCH v2 0/6] Teach '--column-number' to 'git-grep(1)' Taylor Blau
2018-04-22 20:47 ` [PATCH v2 1/6] grep.c: take regmatch_t as argument in match_line() Taylor Blau
2018-04-22 23:14 ` Eric Sunshine
2018-04-22 23:30 ` Taylor Blau
2018-04-22 20:47 ` [PATCH v2 2/6] grep.c: take column number as argument to show_line() Taylor Blau
2018-04-23 0:16 ` Eric Sunshine
2018-04-23 1:17 ` Taylor Blau
2018-04-23 3:30 ` Eric Sunshine
2018-04-23 7:27 ` Ævar Arnfjörð Bjarmason
2018-04-23 7:34 ` Eric Sunshine
2018-04-24 4:27 ` Taylor Blau
2018-04-23 8:01 ` Ævar Arnfjörð Bjarmason
2018-04-24 4:31 ` Taylor Blau
2018-04-24 6:13 ` Junio C Hamano
2018-04-24 18:34 ` Taylor Blau
2018-04-22 20:47 ` [PATCH v2 3/6] grep.[ch]: teach columnnum, color_columnno to grep_opt Taylor Blau
2018-04-22 21:42 ` Ævar Arnfjörð Bjarmason
2018-04-22 23:24 ` Taylor Blau
2018-04-23 0:21 ` Eric Sunshine
2018-04-23 1:11 ` Taylor Blau
2018-04-22 20:47 ` [PATCH v2 4/6] grep.c: display column number of first match Taylor Blau
2018-04-23 0:24 ` Eric Sunshine
2018-04-23 1:12 ` Taylor Blau
2018-04-22 20:47 ` [PATCH v2 5/6] builtin/grep.c: show column numbers via --column-number Taylor Blau
2018-04-22 21:48 ` Ævar Arnfjörð Bjarmason
2018-04-22 23:26 ` Taylor Blau
2018-04-23 0:32 ` Eric Sunshine
2018-04-23 1:14 ` Taylor Blau
2018-04-22 20:47 ` [PATCH v2 6/6] contrib/git-jump/git-jump: use column number when grep-ing Taylor Blau
2018-04-22 21:49 ` Ævar Arnfjörð Bjarmason
2018-04-22 23:27 ` Taylor Blau
2018-04-22 23:28 ` [PATCH v2 0/6] Teach '--column-number' to 'git-grep(1)' Junio C Hamano
2018-04-22 23:34 ` Taylor Blau
2018-04-23 13:46 ` Junio C Hamano
2018-04-24 5:07 ` [PATCH v3 0/7] " Taylor Blau
2018-04-24 5:07 ` [PATCH v3 1/7] Documentation/config.txt: camel-case lineNumber for consistency Taylor Blau
2018-04-24 5:07 ` [PATCH v3 2/7] grep.c: expose matched column in match_line() Taylor Blau
2018-04-24 5:07 ` [PATCH v3 3/7] grep.[ch]: extend grep_opt to allow showing matched column Taylor Blau
2018-04-24 5:07 ` [PATCH v3 4/7] grep.c: display column number of first match Taylor Blau
2018-04-24 5:42 ` Eric Sunshine
2018-04-24 5:07 ` [PATCH v3 5/7] builtin/grep.c: add '--column-number' option to 'git-grep(1)' Taylor Blau
2018-04-24 5:07 ` [PATCH v3 6/7] grep.c: add configuration variables to show matched option Taylor Blau
2018-04-24 5:07 ` [PATCH v3 7/7] contrib/git-jump/git-jump: jump to match column in addition to line Taylor Blau
2018-04-24 5:37 ` Eric Sunshine
2018-04-24 18:39 ` Taylor Blau
2018-05-05 2:42 ` [PATCH v4 0/7] Teach '--column' to 'git-grep(1)' Taylor Blau
2018-05-05 2:42 ` [PATCH v4 1/7] Documentation/config.txt: camel-case lineNumber for consistency Taylor Blau
2018-05-05 2:42 ` [PATCH v4 2/7] grep.c: expose matched column in match_line() Taylor Blau
2018-05-08 6:08 ` René Scharfe
2018-05-05 2:42 ` [PATCH v4 3/7] grep.[ch]: extend grep_opt to allow showing matched column Taylor Blau
2018-05-05 2:43 ` [PATCH v4 4/7] grep.c: display column number of first match Taylor Blau
2018-05-05 2:43 ` [PATCH v4 5/7] builtin/grep.c: add '--column' option to 'git-grep(1)' Taylor Blau
2018-05-05 6:15 ` Duy Nguyen
2018-05-07 23:38 ` Taylor Blau
2018-05-06 17:43 ` Phillip Wood
2018-05-06 17:56 ` Ævar Arnfjörð Bjarmason
2018-05-07 23:40 ` Taylor Blau
2018-05-07 14:13 ` Junio C Hamano
2018-05-08 0:08 ` Taylor Blau
2018-05-05 2:43 ` [PATCH v4 6/7] grep.c: add configuration variables to show matched option Taylor Blau
2018-05-05 2:43 ` [PATCH v4 7/7] contrib/git-jump/git-jump: jump to match column in addition to line Taylor Blau
2018-05-06 14:43 ` Martin Ågren
2018-05-06 18:03 ` Ævar Arnfjörð Bjarmason
2018-05-07 23:35 ` Taylor Blau
2018-05-09 2:13 ` [PATCH v5 0/7] Teach '--column' to 'git-grep(1)' Taylor Blau
2018-05-09 2:13 ` [PATCH v5 1/7] Documentation/config.txt: camel-case lineNumber for consistency Taylor Blau
2018-05-09 2:13 ` [PATCH v5 2/7] grep.c: expose matched column in match_line() Taylor Blau
2018-05-09 2:13 ` [PATCH v5 3/7] grep.[ch]: extend grep_opt to allow showing matched column Taylor Blau
2018-05-09 2:13 ` [PATCH v5 4/7] grep.c: display column number of first match Taylor Blau
2018-05-09 2:13 ` [PATCH v5 5/7] builtin/grep.c: add '--column' option to 'git-grep(1)' Taylor Blau
2018-05-09 10:41 ` Phillip Wood
2018-05-09 17:26 ` Martin Ågren
2018-05-09 23:52 ` Taylor Blau
2018-05-10 0:04 ` Junio C Hamano
2018-05-10 5:58 ` René Scharfe
2018-05-10 6:43 ` Junio C Hamano
2018-05-12 3:27 ` Taylor Blau
2018-05-12 5:08 ` Junio C Hamano
2018-05-12 5:19 ` Taylor Blau
2018-05-12 6:07 ` Junio C Hamano [this message]
2018-05-18 3:38 ` Taylor Blau
2018-05-18 6:27 ` Junio C Hamano
2018-05-18 21:50 ` Taylor Blau
2018-05-19 4:44 ` Taylor Blau
2018-05-09 23:49 ` Taylor Blau
2018-05-09 16:17 ` Duy Nguyen
2018-05-09 23:48 ` Taylor Blau
2018-05-09 2:13 ` [PATCH v5 6/7] grep.c: add configuration variables to show matched option Taylor Blau
2018-05-09 2:13 ` [PATCH v5 7/7] contrib/git-jump/git-jump: jump to match column in addition to line Taylor Blau
2018-05-12 3:10 ` [PATCH v6 0/7] Teach '--column' to 'git-grep(1)' Taylor Blau
2018-05-12 3:11 ` [PATCH v6 1/7] Documentation/config.txt: camel-case lineNumber for consistency Taylor Blau
2018-05-12 3:11 ` [PATCH v6 2/7] grep.c: expose matched column in match_line() Taylor Blau
2018-05-12 3:11 ` [PATCH v6 3/7] grep.[ch]: extend grep_opt to allow showing matched column Taylor Blau
2018-05-12 3:11 ` [PATCH v6 4/7] grep.c: display column number of first match Taylor Blau
2018-05-12 3:11 ` [PATCH v6 5/7] builtin/grep.c: add '--column' option to 'git-grep(1)' Taylor Blau
2018-05-12 3:11 ` [PATCH v6 6/7] grep.c: add configuration variables to show matched option Taylor Blau
2018-05-12 3:11 ` [PATCH v6 7/7] contrib/git-jump/git-jump: jump to match column in addition to line Taylor Blau
2018-04-21 3:45 ` [PATCH 2/6] grep.c: take column number as argument to show_line() Taylor Blau
2018-04-21 3:45 ` [PATCH 3/6] grep.[ch]: teach columnnum, color_columnno to grep_opt Taylor Blau
2018-04-21 8:32 ` Martin Ågren
2018-04-21 3:45 ` [PATCH 4/6] grep.c: display column number of first match Taylor Blau
2018-04-21 3:45 ` [PATCH 5/6] builtin/grep.c: show column numbers via --column-number Taylor Blau
2018-04-21 4:07 ` Junio C Hamano
2018-04-21 4:14 ` Junio C Hamano
2018-04-21 5:36 ` René Scharfe
2018-04-21 8:39 ` Martin Ågren
2018-04-21 3:45 ` [PATCH 6/6] contrib/git-jump/git-jump: use column number when grep-ing Taylor Blau
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