git@vger.kernel.org mailing list mirror (one of many)
 help / color / mirror / code / Atom feed
From: Johannes Schindelin <Johannes.Schindelin@gmx.de>
To: Junio C Hamano <gitster@pobox.com>
Cc: Stefan Beller <sbeller@google.com>,
	git@vger.kernel.org, jacob.keller@gmail.com, me@ikke.info
Subject: Re: [PATCHv2 2/7] revision.h: introduce blob/tree walking in order of the commits
Date: Wed, 1 Nov 2017 13:26:57 +0100 (CET)	[thread overview]
Message-ID: <alpine.DEB.2.21.1.1711011316590.6482@virtualbox> (raw)
In-Reply-To: <xmqqr2tiveqp.fsf@gitster.mtv.corp.google.com>

Hi,

On Wed, 1 Nov 2017, Junio C Hamano wrote:

> Stefan Beller <sbeller@google.com> writes:
> 
> > diff --git a/t/t6100-rev-list-in-order.sh b/t/t6100-rev-list-in-order.sh
> > new file mode 100755
> > index 0000000000..651666979b
> > --- /dev/null
> > +++ b/t/t6100-rev-list-in-order.sh
> > @@ -0,0 +1,46 @@
> > +#!/bin/sh
> > +
> > +test_description='miscellaneous rev-list tests'
> > +
> > +. ./test-lib.sh
> > +
> > +
> > +test_expect_success 'setup' '
> > +	for x in one two three four
> > +	do
> > +		echo $x >$x &&
> > +		git add $x &&
> > +		git commit -m "add file $x"
> > +	done &&
> > +	for x in four three
> > +	do
> > +		git rm $x &&
> > +		git commit -m "remove $x"
> > +	done &&
> 
> When "git commit -m 'remove four'" fails, this loop would still
> continue, so the &&-chain in "done &&" would still be rendered
> ineffetive.

... so the proper fix is to append an "|| break", as in:

	...
	for x in four three
	do
		git rm $x &&
		git commit -m "remote $x" ||
		break
	done &&
	...

But that is still incorrect, as the "break" statement will succeed,
breaking (pun intended) the && chain in a different way. The canonical way
to do it is to wrap the loop in a subshell, *and also* test $? (because
`(exit 1) && echo something` still prints `something`):

	...
	(
		for x in four three
		do
			git rm $x &&
			git commit -m "remote $x" ||
			exit
		done
	) &&
	test 0 -eq $? &&
	...

Ugly? Yes. Correct? Also yes.

Ciao,
Dscho

  reply	other threads:[~2017-11-01 12:27 UTC|newest]

Thread overview: 110+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-28  0:44 [RFC PATCH 0/3] git-describe <blob> ? Stefan Beller
2017-10-28  0:45 ` [PATCH 1/3] list-objects.c: factor out traverse_trees_and_blobs Stefan Beller
2017-10-28  0:45   ` [PATCH 2/3] revision.h: introduce blob/tree walking in order of the commits Stefan Beller
2017-10-28 17:20     ` Johannes Schindelin
2017-10-29  3:22       ` Stefan Beller
2017-10-29  3:23         ` Stefan Beller
2017-10-29  3:43           ` Junio C Hamano
2017-10-28  0:45   ` [PATCH 3/3] builtin/describe: describe blobs Stefan Beller
2017-10-28 17:32     ` Johannes Schindelin
2017-10-28 22:47       ` Jacob Keller
2017-10-29  3:28       ` Stefan Beller
2017-10-29 12:02         ` Kevin Daudt
2017-10-29 12:07         ` Johannes Schindelin
2017-10-28 17:15   ` [PATCH 1/3] list-objects.c: factor out traverse_trees_and_blobs Johannes Schindelin
2017-10-29  3:13     ` Stefan Beller
2017-10-28 16:04 ` [RFC PATCH 0/3] git-describe <blob> ? Johannes Schindelin
2017-10-31  0:33 ` [PATCH 0/7] git-describe <blob> Stefan Beller
2017-10-31  0:33   ` [PATCH 1/7] list-objects.c: factor out traverse_trees_and_blobs Stefan Beller
2017-10-31  6:07     ` Junio C Hamano
2017-10-31  0:33   ` [PATCH 2/7] revision.h: introduce blob/tree walking in order of the commits Stefan Beller
2017-10-31  6:57     ` Junio C Hamano
2017-10-31 18:12       ` Stefan Beller
2017-10-31  0:33   ` [PATCH 3/7] builtin/describe.c: rename `oid` to avoid variable shadowing Stefan Beller
2017-10-31  8:15     ` Jacob Keller
2017-10-31  0:33   ` [PATCH 4/7] builtin/describe.c: print debug statements earlier Stefan Beller
2017-10-31  7:03     ` Junio C Hamano
2017-10-31 19:05       ` Stefan Beller
2017-10-31  0:33   ` [PATCH 5/7] builtin/describe.c: factor out describe_commit Stefan Beller
2017-10-31  0:33   ` [PATCH 6/7] builtin/describe.c: describe a blob Stefan Beller
2017-10-31  6:25     ` Junio C Hamano
2017-10-31 19:16       ` Stefan Beller
2017-11-01  3:34         ` Junio C Hamano
2017-11-01 20:58           ` Stefan Beller
2017-11-02  1:53             ` Junio C Hamano
2017-11-02  4:23               ` Junio C Hamano
2017-11-04 21:15                 ` Philip Oakley
2017-11-05  6:28                   ` Junio C Hamano
2017-11-06 23:50                     ` Philip Oakley
2017-11-09 20:30                       ` Stefan Beller
2017-11-10  0:25                         ` Philip Oakley
2017-11-10  1:24                           ` Junio C Hamano
2017-11-10 22:44                             ` [PATCH 0/1] describe a blob: with better docs Stefan Beller
2017-11-10 22:44                               ` [PATCH] builtin/describe.c: describe a blob Stefan Beller
2017-11-13  1:33                                 ` Junio C Hamano
2017-11-14 23:37                                   ` Stefan Beller
2017-11-20 15:22                             ` [PATCH 6/7] " Philip Oakley
2017-11-20 18:18                               ` Philip Oakley
2017-11-01  3:44         ` Junio C Hamano
2017-10-31  0:33   ` [PATCH 7/7] t6120: fix typo in test name Stefan Beller
2017-11-01  1:21     ` Junio C Hamano
2017-11-01 18:13       ` Stefan Beller
2017-11-02  1:36       ` Junio C Hamano
2017-10-31 21:18   ` [PATCHv2 0/7] git describe blob Stefan Beller
2017-10-31 21:18     ` [PATCHv2 1/7] list-objects.c: factor out traverse_trees_and_blobs Stefan Beller
2017-11-01  3:46       ` Junio C Hamano
2017-10-31 21:18     ` [PATCHv2 2/7] revision.h: introduce blob/tree walking in order of the commits Stefan Beller
2017-11-01  3:50       ` Junio C Hamano
2017-11-01 12:26         ` Johannes Schindelin [this message]
2017-11-01 12:37           ` Junio C Hamano
2017-11-01 19:37             ` Stefan Beller
2017-11-01 22:08               ` Johannes Schindelin
2017-11-01 22:19                 ` Stefan Beller
2017-11-01 22:39                   ` Johannes Schindelin
2017-11-01 22:46                     ` Stefan Beller
2017-11-01 21:36             ` Johannes Schindelin
2017-11-01 21:39               ` Jeff King
2017-11-01 22:33                 ` Johannes Schindelin
2017-11-02  1:20                   ` Junio C Hamano
2017-10-31 21:18     ` [PATCHv2 3/7] builtin/describe.c: rename `oid` to avoid variable shadowing Stefan Beller
2017-10-31 21:18     ` [PATCHv2 4/7] builtin/describe.c: print debug statements earlier Stefan Beller
2017-10-31 21:31       ` Eric Sunshine
2017-10-31 21:18     ` [PATCHv2 5/7] builtin/describe.c: factor out describe_commit Stefan Beller
2017-10-31 21:18     ` [PATCHv2 6/7] builtin/describe.c: describe a blob Stefan Beller
2017-10-31 21:49       ` Eric Sunshine
2017-11-01 19:51         ` Stefan Beller
2017-11-01  4:11       ` Junio C Hamano
2017-11-01 12:32         ` Johannes Schindelin
2017-11-01 17:59           ` Stefan Beller
2017-11-01 21:05             ` Jacob Keller
2017-11-01 22:12               ` Johannes Schindelin
2017-11-01 22:21                 ` Stefan Beller
2017-11-01 22:41                   ` Johannes Schindelin
2017-11-01 22:53                     ` Stefan Beller
2017-11-02  6:05                     ` Jacob Keller
2017-11-03  5:18                       ` Junio C Hamano
2017-11-03  6:55                         ` Jacob Keller
2017-11-03 15:02                           ` Junio C Hamano
2017-11-02  7:23                     ` Andreas Schwab
2017-11-02 18:18                       ` Stefan Beller
2017-11-03 12:05                         ` Johannes Schindelin
2017-11-01 21:28         ` Stefan Beller
2017-10-31 21:18     ` [PATCHv2 7/7] t6120: fix typo in test name Stefan Beller
2017-11-01  5:14     ` [PATCHv2 0/7] git describe blob Junio C Hamano
2017-11-02 19:41     ` [PATCHv3 " Stefan Beller
2017-11-02 19:41       ` [PATCHv3 1/7] t6120: fix typo in test name Stefan Beller
2017-11-02 19:41       ` [PATCHv3 2/7] list-objects.c: factor out traverse_trees_and_blobs Stefan Beller
2017-11-02 19:41       ` [PATCHv3 3/7] revision.h: introduce blob/tree walking in order of the commits Stefan Beller
2017-11-14 19:52         ` Jonathan Tan
2017-11-02 19:41       ` [PATCHv3 4/7] builtin/describe.c: rename `oid` to avoid variable shadowing Stefan Beller
2017-11-02 19:41       ` [PATCHv3 5/7] builtin/describe.c: print debug statements earlier Stefan Beller
2017-11-14 19:55         ` Jonathan Tan
2017-11-14 20:00           ` Stefan Beller
2017-11-02 19:41       ` [PATCHv3 6/7] builtin/describe.c: factor out describe_commit Stefan Beller
2017-11-02 19:41       ` [PATCHv3 7/7] builtin/describe.c: describe a blob Stefan Beller
2017-11-14 20:02         ` Jonathan Tan
2017-11-14 20:40           ` Stefan Beller
2017-11-14 21:17             ` Jonathan Tan
2017-11-03  0:23       ` [PATCHv3 0/7] git describe blob Jacob Keller
2017-11-03  1:46         ` Junio C Hamano
2017-11-03  2:29           ` Stefan Beller

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: http://vger.kernel.org/majordomo-info.html

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=alpine.DEB.2.21.1.1711011316590.6482@virtualbox \
    --to=johannes.schindelin@gmx.de \
    --cc=git@vger.kernel.org \
    --cc=gitster@pobox.com \
    --cc=jacob.keller@gmail.com \
    --cc=me@ikke.info \
    --cc=sbeller@google.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
Code repositories for project(s) associated with this public inbox

	https://80x24.org/mirrors/git.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).