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From: Junio C Hamano <gitster@pobox.com>
To: Emily Shaffer <emilyshaffer@google.com>
Cc: Johannes Schindelin <Johannes.Schindelin@gmx.de>, git@vger.kernel.org
Subject: Re: [PATCH v7 03/15] bugreport: add tool to generate debugging info
Date: Wed, 19 Feb 2020 14:09:48 -0800
Message-ID: <xmqqtv3mcjpv.fsf@gitster-ct.c.googlers.com> (raw)
In-Reply-To: <20200219215231.GA26221@google.com> (Emily Shaffer's message of "Wed, 19 Feb 2020 13:52:31 -0800")

Emily Shaffer <emilyshaffer@google.com> writes:

> launch_specified_editor() has a handful of exit points, of three kinds:
>  1. return error(something)
>  2. raise(sigsomething)
>  3. return 0
>     a. when the editor process closed happily, but the user supplied
>        NULL instead of a buffer. That is, the user didn't want the
>        contents of the editor given back to them in a strbuf.
>     b. when the editor process closed happily and the user's supplied
>        buffer was filled with the file's contents with no issue.
>
> So I think we can check "yes" here.

Heh.  If we raised a signal to kill ourselves, then we won't be
returning a value from launch_editor() anyway.  That case won't
affect the "between returning negation or !!, which is more
appropriate?" discussion, I think.

>>  - we MUST NOT care to differenciate different error codes returned
>>    from launch_editor().  IOW, we must be fine to give the invoker
>>    of the program only 0 (success) or 1 (unspecified failure).

I actually think this holds for the codepath.  A failure from
start_command() returns error(), and finish_command() that waits for
the spawned editor process to complete yields the exit status from
the editor, but unless we re-raise the signal that killed the editor
process to ourselves, we just turn any non-zero exit into "return
error()", so it is safe to say launch_editor() can return either 0
or -1 and nothing else.  Would we later want to tell callers of
launch_editor() how/why the editor session failed by returning
something else?  I do not offhand think of any---we do not even
differenciate between failure to start (e.g. misspelt command name
for the editor) and other failures WITH the return value and
consider it sufficient to tell the user with different error
message right now.

So in practice returning -launch_editor() and !!launch_editor()
would not make any difference, I would think.


  reply index

Thread overview: 273+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-13  0:42 [PATCH v4 00/15] add git-bugreport tool Emily Shaffer
2019-12-13  0:42 ` [PATCH v4 01/15] bugreport: add tool to generate debugging info Emily Shaffer
2019-12-13  0:42 ` [PATCH v4 02/15] help: move list_config_help to builtin/help Emily Shaffer
2019-12-13 20:51   ` Junio C Hamano
2019-12-16 21:36     ` Emily Shaffer
2019-12-16 22:19       ` Junio C Hamano
2019-12-16 22:34         ` Emily Shaffer
2019-12-13  0:43 ` [PATCH v4 03/15] bugreport: gather git version and build info Emily Shaffer
2019-12-13 21:06   ` Junio C Hamano
2019-12-20  1:46     ` Emily Shaffer
2019-12-17 18:45   ` Johannes Schindelin
2019-12-17 20:34     ` Junio C Hamano
2019-12-20  1:25       ` Emily Shaffer
2019-12-13  0:43 ` [PATCH v4 04/15] help: add shell-path to --build-options Emily Shaffer
2019-12-13  0:43 ` [PATCH v4 05/15] bugreport: add uname info Emily Shaffer
2019-12-13 21:12   ` Junio C Hamano
2020-01-10  2:05   ` Aaron Schrab
2019-12-13  0:43 ` [PATCH v4 06/15] bugreport: add glibc version Emily Shaffer
2019-12-13 21:18   ` Junio C Hamano
2019-12-16 22:39     ` Emily Shaffer
2019-12-13  0:43 ` [PATCH v4 07/15] bugreport: add curl version Emily Shaffer
2019-12-13 21:27   ` Junio C Hamano
2019-12-16 22:49     ` Emily Shaffer
2019-12-17 18:47   ` Johannes Schindelin
2019-12-13  0:43 ` [PATCH v4 08/15] bugreport: include user interactive shell Emily Shaffer
2019-12-13 21:38   ` Junio C Hamano
2019-12-13  0:43 ` [PATCH v4 09/15] bugreport: generate config safelist based on docs Emily Shaffer
2019-12-13 22:57   ` Junio C Hamano
2019-12-16 23:01     ` Emily Shaffer
2019-12-17  0:41       ` Emily Shaffer
2019-12-15 20:17   ` Johannes Schindelin
2019-12-16 22:52     ` Emily Shaffer
2019-12-17 18:38   ` Johannes Schindelin
2019-12-13  0:43 ` [PATCH v4 10/15] bugreport: add config values from safelist Emily Shaffer
2019-12-13 21:45   ` Junio C Hamano
2019-12-16 23:40     ` Emily Shaffer
2019-12-17 17:43       ` Junio C Hamano
2020-01-24  3:29         ` Emily Shaffer
2019-12-29 20:17   ` Johannes Schindelin
2019-12-13  0:43 ` [PATCH v4 11/15] bugreport: collect list of populated hooks Emily Shaffer
2019-12-13 21:47   ` Junio C Hamano
2019-12-16 23:51     ` Emily Shaffer
2019-12-13  0:43 ` [PATCH v4 12/15] bugreport: count loose objects Emily Shaffer
2019-12-13 21:51   ` Junio C Hamano
2019-12-16 23:54     ` Emily Shaffer
2019-12-13  0:43 ` [PATCH v4 13/15] bugreport: add packed object summary Emily Shaffer
2019-12-13 21:56   ` Junio C Hamano
2019-12-16 23:56     ` Emily Shaffer
2019-12-13  0:43 ` [PATCH v4 14/15] bugreport: list contents of $OBJDIR/info Emily Shaffer
2019-12-13  0:43 ` [PATCH v4 15/15] bugreport: summarize contents of alternates file Emily Shaffer
2020-01-24  3:34 ` [PATCH v5 00/15] add git-bugreport tool emilyshaffer
2020-01-24  3:34   ` [PATCH v5 01/15] bugreport: add tool to generate debugging info emilyshaffer
2020-01-30 22:18     ` Martin Ågren
2020-02-04 22:00       ` Emily Shaffer
2020-01-24  3:34   ` [PATCH v5 02/15] help: move list_config_help to builtin/help emilyshaffer
2020-01-30 22:19     ` Martin Ågren
2020-02-04  0:53       ` Emily Shaffer
2020-01-24  3:34   ` [PATCH v5 03/15] bugreport: gather git version and build info emilyshaffer
2020-01-30 22:19     ` Martin Ågren
2020-02-04 22:21       ` Emily Shaffer
2020-01-24  3:34   ` [PATCH v5 04/15] help: add shell-path to --build-options emilyshaffer
2020-01-30 22:21     ` Martin Ågren
2020-01-24  3:34   ` [PATCH v5 05/15] bugreport: add uname info emilyshaffer
2020-01-24  3:34   ` [PATCH v5 06/15] bugreport: add compiler info emilyshaffer
2020-01-30 22:21     ` Martin Ågren
2020-02-04 22:51       ` Emily Shaffer
2020-02-05 19:47         ` Martin Ågren
2020-01-24  3:34   ` [PATCH v5 07/15] bugreport: add curl version emilyshaffer
2020-01-30 22:27     ` Martin Ågren
2020-02-04 22:54       ` Emily Shaffer
2020-01-24  3:34   ` [PATCH v5 08/15] bugreport: include user interactive shell emilyshaffer
2020-01-30 22:28     ` Martin Ågren
2020-02-04 23:16       ` Emily Shaffer
2020-02-05 20:06       ` Junio C Hamano
2020-02-05 20:14         ` Martin Ågren
2020-01-24  3:34   ` [PATCH v5 09/15] bugreport: generate config safelist based on docs emilyshaffer
2020-01-30 22:34     ` Martin Ågren
2020-02-05  0:44       ` Emily Shaffer
2020-02-05 19:53         ` Martin Ågren
2020-01-31 21:20     ` Martin Ågren
2020-02-05  0:30       ` Emily Shaffer
2020-02-05  0:52         ` Emily Shaffer
2020-01-24  3:34   ` [PATCH v5 10/15] bugreport: add config values from safelist emilyshaffer
2020-01-30 22:36     ` Martin Ågren
2020-02-05  1:34       ` Emily Shaffer
2020-01-31 21:25     ` Martin Ågren
2020-02-05  2:31       ` Emily Shaffer
2020-02-05 20:12         ` Martin Ågren
2020-01-24  3:34   ` [PATCH v5 11/15] bugreport: collect list of populated hooks emilyshaffer
2020-02-04 18:44     ` Junio C Hamano
2020-02-05  2:48       ` Emily Shaffer
2020-02-05  3:00         ` Emily Shaffer
2020-01-24  3:34   ` [PATCH v5 12/15] bugreport: count loose objects emilyshaffer
2020-02-04 18:48     ` Junio C Hamano
2020-02-05  2:50       ` Emily Shaffer
2020-01-24  3:34   ` [PATCH v5 13/15] bugreport: add packed object summary emilyshaffer
2020-02-04 19:00     ` Junio C Hamano
2020-02-05  3:15       ` Emily Shaffer
2020-02-04 19:03     ` Junio C Hamano
2020-02-05  3:09       ` Emily Shaffer
2020-01-24  3:34   ` [PATCH v5 14/15] bugreport: list contents of $OBJDIR/info emilyshaffer
2020-01-24  3:34   ` [PATCH v5 15/15] bugreport: summarize contents of alternates file emilyshaffer
2020-01-24  3:38   ` [PATCH v5 00/15] add git-bugreport tool Emily Shaffer
2020-01-28 23:04   ` Jonathan Tan
2020-01-28 23:26     ` Emily Shaffer
2020-01-30 22:15   ` Martin Ågren
2020-02-04  0:07     ` Emily Shaffer
2020-02-06  0:40   ` [PATCH v6 " Emily Shaffer
2020-02-06  0:40     ` [PATCH v6 01/15] help: move list_config_help to builtin/help Emily Shaffer
2020-02-06  1:35       ` Danh Doan
2020-02-13 22:58         ` Emily Shaffer
2020-02-13 23:07           ` Eric Sunshine
2020-02-13 23:24             ` Junio C Hamano
2020-02-13 23:29               ` Eric Sunshine
2020-02-14  1:20                 ` Emily Shaffer
2020-02-06  0:40     ` [PATCH v6 02/15] help: add shell-path to --build-options Emily Shaffer
2020-02-06  0:40     ` [PATCH v6 03/15] bugreport: add tool to generate debugging info Emily Shaffer
2020-02-07 14:18       ` SZEDER Gábor
2020-02-07 18:51         ` Junio C Hamano
2020-02-11 22:40           ` Emily Shaffer
2020-02-07 14:54       ` SZEDER Gábor
2020-02-12 18:06       ` Junio C Hamano
2020-02-12 22:36         ` Emily Shaffer
2020-02-06  0:40     ` [PATCH v6 04/15] bugreport: gather git version and build info Emily Shaffer
2020-02-06  0:40     ` [PATCH v6 05/15] bugreport: add uname info Emily Shaffer
2020-02-06  0:40     ` [PATCH v6 06/15] bugreport: add compiler info Emily Shaffer
2020-02-06  0:41     ` [PATCH v6 07/15] bugreport: add git-remote-https version Emily Shaffer
2020-02-06  0:41     ` [PATCH v6 08/15] bugreport: include user interactive shell Emily Shaffer
2020-02-06  0:41     ` [PATCH v6 09/15] bugreport: generate config safelist based on docs Emily Shaffer
2020-02-07 15:30       ` SZEDER Gábor
2020-02-13 23:14         ` Emily Shaffer
2020-02-06  0:41     ` [PATCH v6 10/15] bugreport: add config values from safelist Emily Shaffer
2020-02-07 14:47       ` SZEDER Gábor
2020-02-07 15:08         ` SZEDER Gábor
2020-02-07 16:24           ` Eric Sunshine
2020-02-07 16:51             ` Andreas Schwab
2020-02-13 22:02               ` Emily Shaffer
2020-02-06  0:41     ` [PATCH v6 11/15] bugreport: collect list of populated hooks Emily Shaffer
2020-02-06  0:41     ` [PATCH v6 12/15] bugreport: count loose objects Emily Shaffer
2020-02-06  0:41     ` [PATCH v6 13/15] bugreport: add packed object summary Emily Shaffer
2020-02-06  0:41     ` [PATCH v6 14/15] bugreport: list contents of $OBJDIR/info Emily Shaffer
2020-02-06  0:41     ` [PATCH v6 15/15] bugreport: summarize contents of alternates file Emily Shaffer
2020-02-14  1:53     ` [PATCH v7 00/15] add git-bugreport tool Emily Shaffer
2020-02-14  1:53       ` [PATCH v7 01/15] help: move list_config_help to builtin/help Emily Shaffer
2020-02-14  1:53       ` [PATCH v7 02/15] help: add shell-path to --build-options Emily Shaffer
2020-02-14  1:53       ` [PATCH v7 03/15] bugreport: add tool to generate debugging info Emily Shaffer
2020-02-14 17:25         ` Junio C Hamano
2020-02-15  1:57           ` Emily Shaffer
2020-02-15 18:24             ` Junio C Hamano
2020-02-18 23:46               ` Emily Shaffer
2020-02-18 23:56                 ` Emily Shaffer
2020-02-19 23:15                   ` Emily Shaffer
2020-02-19 23:24                     ` Junio C Hamano
2020-02-19 14:18         ` Johannes Schindelin
2020-02-19 16:55           ` Junio C Hamano
2020-02-19 21:52             ` Emily Shaffer
2020-02-19 22:09               ` Junio C Hamano [this message]
2020-02-19 23:06                 ` Emily Shaffer
2020-02-14  1:53       ` [PATCH v7 04/15] bugreport: gather git version and build info Emily Shaffer
2020-02-14  1:53       ` [PATCH v7 05/15] bugreport: add uname info Emily Shaffer
2020-02-14  1:53       ` [PATCH v7 06/15] bugreport: add compiler info Emily Shaffer
2020-02-19 14:23         ` Johannes Schindelin
2020-02-19 22:45           ` Emily Shaffer
2020-02-20 22:33             ` Johannes Schindelin
2020-02-20 23:33               ` Emily Shaffer
2020-02-21 15:22                 ` Johannes Schindelin
2020-02-22  0:04                   ` Emily Shaffer
2020-02-24  2:55                     ` Junio C Hamano
2020-02-14  1:53       ` [PATCH v7 07/15] bugreport: add git-remote-https version Emily Shaffer
2020-02-19 14:28         ` Johannes Schindelin
2020-02-19 22:28           ` Emily Shaffer
2020-02-19 22:33             ` Junio C Hamano
2020-02-20 22:33               ` Johannes Schindelin
2020-02-14  1:53       ` [PATCH v7 08/15] bugreport: include user interactive shell Emily Shaffer
2020-02-14  1:53       ` [PATCH v7 09/15] bugreport: generate config safelist based on docs Emily Shaffer
2020-02-14  1:53       ` [PATCH v7 10/15] bugreport: add config values from safelist Emily Shaffer
2020-02-14  1:53       ` [PATCH v7 11/15] bugreport: collect list of populated hooks Emily Shaffer
2020-02-14  1:53       ` [PATCH v7 12/15] bugreport: count loose objects Emily Shaffer
2020-02-14  1:53       ` [PATCH v7 13/15] bugreport: add packed object summary Emily Shaffer
2020-02-14  1:53       ` [PATCH v7 14/15] bugreport: list contents of $OBJDIR/info Emily Shaffer
2020-02-14 17:04         ` Junio C Hamano
2020-02-18 23:59           ` Emily Shaffer
2020-02-14  1:53       ` [PATCH v7 15/15] bugreport: summarize contents of alternates file Emily Shaffer
2020-02-14 17:32       ` [PATCH v7 00/15] add git-bugreport tool Junio C Hamano
2020-02-14 22:00         ` Emily Shaffer
2020-02-14 22:30           ` Junio C Hamano
2020-02-20  1:58       ` [PATCH v8 " Emily Shaffer
2020-02-20  1:58         ` [PATCH v8 01/15] help: move list_config_help to builtin/help Emily Shaffer
2020-02-20  1:58         ` [PATCH v8 02/15] help: add shell-path to --build-options Emily Shaffer
2020-02-20 19:03           ` Junio C Hamano
2020-02-20 21:15             ` Emily Shaffer
2020-02-20  1:58         ` [PATCH v8 03/15] bugreport: add tool to generate debugging info Emily Shaffer
2020-02-20 19:33           ` Junio C Hamano
2020-02-20 22:33             ` Emily Shaffer
2020-02-26 16:12           ` Johannes Schindelin
2020-02-20  1:58         ` [PATCH v8 04/15] bugreport: gather git version and build info Emily Shaffer
2020-02-20 20:07           ` Junio C Hamano
2020-02-20 23:03             ` Emily Shaffer
2020-02-20 23:18               ` Junio C Hamano
2020-02-20  1:58         ` [PATCH v8 05/15] bugreport: add uname info Emily Shaffer
2020-02-20 20:12           ` Junio C Hamano
2020-02-20 23:20             ` Emily Shaffer
2020-02-20  1:58         ` [PATCH v8 06/15] bugreport: add compiler info Emily Shaffer
2020-02-20  2:49           ` Danh Doan
2020-02-20 23:23             ` Emily Shaffer
2020-02-20 20:23           ` Junio C Hamano
2020-02-21  0:26           ` Junio C Hamano
2020-02-20  1:58         ` [PATCH v8 07/15] bugreport: add git-remote-https version Emily Shaffer
2020-02-20 20:35           ` Junio C Hamano
2020-02-20 23:28             ` Emily Shaffer
2020-02-21  3:44               ` Junio C Hamano
2020-02-25 22:08                 ` Emily Shaffer
2020-02-25 22:26                   ` Junio C Hamano
2020-02-25 23:29                     ` Emily Shaffer
2020-02-25 23:29                   ` Junio C Hamano
2020-02-25 23:55                     ` Emily Shaffer
2020-02-20  1:58         ` [PATCH v8 08/15] bugreport: include user interactive shell Emily Shaffer
2020-02-20  1:58         ` [PATCH v8 09/15] bugreport: generate config safelist based on docs Emily Shaffer
2020-02-20 20:40           ` Junio C Hamano
2020-02-26 16:13           ` Johannes Schindelin
2020-02-26 16:49             ` Junio C Hamano
2020-02-20  1:58         ` [PATCH v8 10/15] bugreport: add config values from safelist Emily Shaffer
2020-02-20 20:47           ` Junio C Hamano
2020-02-20  1:58         ` [PATCH v8 11/15] bugreport: collect list of populated hooks Emily Shaffer
2020-02-20 20:58           ` Junio C Hamano
2020-02-25 23:19             ` Emily Shaffer
2020-02-20  1:58         ` [PATCH v8 12/15] bugreport: count loose objects Emily Shaffer
2020-02-20 21:04           ` Junio C Hamano
2020-02-25 23:22             ` Emily Shaffer
2020-02-25 23:26               ` Emily Shaffer
2020-02-20  1:58         ` [PATCH v8 13/15] bugreport: add packed object summary Emily Shaffer
2020-02-20 22:04           ` Junio C Hamano
2020-02-25 23:58             ` Emily Shaffer
2020-02-20  1:58         ` [PATCH v8 14/15] bugreport: list contents of $OBJDIR/info Emily Shaffer
2020-02-20 22:18           ` Junio C Hamano
2020-02-20  1:58         ` [PATCH v8 15/15] bugreport: summarize contents of alternates file Emily Shaffer
2020-02-20 14:08           ` Johannes Schindelin
2020-02-20 22:22           ` Junio C Hamano
2020-03-02 23:03         ` [PATCH v9 0/5] add git-bugreport tool Emily Shaffer
2020-03-02 23:03           ` [PATCH v9 1/5] help: move list_config_help to builtin/help Emily Shaffer
2020-03-02 23:03           ` [PATCH v9 2/5] bugreport: add tool to generate debugging info Emily Shaffer
2020-03-03 14:18             ` Johannes Schindelin
2020-03-04 21:35             ` Johannes Schindelin
2020-03-05 23:34               ` Jeff Hostetler
2020-03-06 13:57                 ` Johannes Schindelin
2020-03-06 18:25                   ` Junio C Hamano
2020-03-06 18:08                 ` Junio C Hamano
2020-03-06 18:58                   ` Jeff Hostetler
2020-03-08 22:24                   ` Johannes Schindelin
2020-03-09 14:59                     ` Junio C Hamano
2020-03-09 19:17                       ` Johannes Schindelin
2020-03-09 19:47                         ` Junio C Hamano
2020-03-10 11:42                           ` Johannes Schindelin
2020-03-10 18:37                             ` Junio C Hamano
2020-03-10 22:08                               ` Johannes Schindelin
2020-03-19 21:39               ` Emily Shaffer
2020-03-20  0:28                 ` Junio C Hamano
2020-03-20 15:35                   ` Johannes Schindelin
2020-03-23 18:52                     ` Emily Shaffer
2020-03-20 15:42                 ` Johannes Schindelin
2020-03-23 18:50                   ` Emily Shaffer
2020-03-20 17:43                 ` Junio C Hamano
2020-03-20 22:38                   ` Johannes Schindelin
2020-03-20 22:47                     ` Junio C Hamano
2020-03-21 10:53                       ` Johannes Schindelin
2020-03-02 23:03           ` [PATCH v9 3/5] bugreport: gather git version and build info Emily Shaffer
2020-03-23 21:20             ` Junio C Hamano
2020-03-02 23:03           ` [PATCH v9 4/5] bugreport: add uname info Emily Shaffer
2020-03-02 23:04           ` [PATCH v9 5/5] bugreport: add compiler info Emily Shaffer
2020-03-03 11:46             ` Danh Doan
2020-03-03 14:07             ` Junio C Hamano
2020-03-04 21:39             ` Johannes Schindelin
2020-03-23 21:27               ` Emily Shaffer

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