From: Junio C Hamano <gitster@pobox.com>
To: Rohit Ashiwal <rohit.ashiwal265@gmail.com>
Cc: git@vger.kernel.org, newren@gmail.com, t.gummerer@gmail.com,
phillip.wood123@gmail.com
Subject: Re: [GSoC][PATCH v3 2/3] cherry-pick/revert: add --skip option
Date: Thu, 13 Jun 2019 12:57:25 -0700 [thread overview]
Message-ID: <xmqqtvctuul6.fsf@gitster-ct.c.googlers.com> (raw)
In-Reply-To: <xmqqa7elwer9.fsf@gitster-ct.c.googlers.com> (Junio C. Hamano's message of "Thu, 13 Jun 2019 10:56:26 -0700")
Junio C Hamano <gitster@pobox.com> writes:
>> -static int rollback_single_pick(struct repository *r)
>> +static int rollback_single_pick(struct repository *r, unsigned int is_skip)
>> {
>> ...
>> + if (is_null_oid(&head_oid) && !is_skip)
>> return error(_("cannot abort from a branch yet to be born"));
>> return reset_for_rollback(&head_oid);
>> }
>
> It is unclear *why* the function (and more importantly, its callers)
> would want to omit two sanity checks when is_skip is in effect.
> ...
>> + default:
>> + BUG("the control must not reach here");
>> + }
>> +
>> + if (rollback_single_pick(r, 1))
>> + return error(_("failed to skip the commit"));
>
> And this takes us back to the previous comment. By passing '1'
> here, this caller is asking the callee to omit certain sanity check
> the original version of the callee used to do. What makes it an
> appropriate thing to do so here?
I think my earlier comments would lead to a wrong direction, i.e. to
justify the change made to rollback_single_pick(), so let's step
back a bit. Perhaps the change is unjustifiable and that is why I
had trouble reading it and trying to make sense out of it.
Is it possible that the new callsite that passes is_skip==1 should
not be calling it (while castrating many parts of the callee) in the
first place? Perhaps it is doing something _different_ from being
called "rollback single pick" (or perhaps the name of the function
is not specific enough to describe what its existing caller, i.e. the
one that passes is_skip==0 after your patch, calls it for)? IOW,
would it lead to a better code structure if you left the original
rollback_single_pick() helper and its caller alone (perhaps rename
it to make it clearer what it does), and *add* a new helper around
the underlying reset_for_rollback() function and call it from here?
Perhaps it is not rolling back but is skipping, so the new function
needs to be called skip_single_pick() or something, and the existing
one is named correctly and there is no need for even renaming?
next prev parent reply other threads:[~2019-06-13 19:57 UTC|newest]
Thread overview: 95+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-08 19:19 [GSoC][PATCH 0/3] Teach cherry-pick/revert to skip commits Rohit Ashiwal
2019-06-08 19:19 ` [GSoC][PATCH 1/3] sequencer: add advice for revert Rohit Ashiwal
2019-06-09 17:52 ` Phillip Wood
2019-06-10 5:13 ` Rohit Ashiwal
2019-06-10 10:39 ` Phillip Wood
2019-06-10 13:25 ` Rohit Ashiwal
2019-06-10 17:46 ` Phillip Wood
2019-06-10 16:34 ` Junio C Hamano
2019-06-08 19:19 ` [GSoC][PATCH 2/3] cherry-pick/revert: add --skip option Rohit Ashiwal
2019-06-09 8:37 ` Thomas Gummerer
2019-06-09 18:01 ` Phillip Wood
2019-06-10 5:57 ` Rohit Ashiwal
2019-06-10 10:40 ` Phillip Wood
2019-06-10 13:43 ` Rohit Ashiwal
2019-06-10 17:47 ` Phillip Wood
2019-06-08 19:19 ` [GSoC][PATCH 3/3] cherry-pick/revert: update hints Rohit Ashiwal
2019-06-09 8:42 ` Thomas Gummerer
2019-06-09 18:03 ` Phillip Wood
2019-06-10 5:28 ` Rohit Ashiwal
2019-06-10 10:40 ` Phillip Wood
2019-06-10 13:33 ` Rohit Ashiwal
2019-06-10 17:47 ` Phillip Wood
2019-06-09 9:02 ` [GSoC][PATCH 0/3] Teach cherry-pick/revert to skip commits Thomas Gummerer
2019-06-09 10:06 ` Rohit Ashiwal
2019-06-09 20:00 ` Thomas Gummerer
2019-06-11 7:31 ` [GSoC][PATCH v2 " Rohit Ashiwal
2019-06-11 7:31 ` [GSoC][PATCH v2 1/3] sequencer: add advice for revert Rohit Ashiwal
2019-06-11 21:25 ` Junio C Hamano
2019-06-11 7:31 ` [GSoC][PATCH v2 2/3] cherry-pick/revert: add --skip option Rohit Ashiwal
2019-06-12 13:31 ` Phillip Wood
2019-06-12 18:11 ` Junio C Hamano
2019-06-12 18:57 ` Phillip Wood
2019-06-11 7:31 ` [GSoC][PATCH v2 3/3] cherry-pick/revert: advise using --skip Rohit Ashiwal
2019-06-12 15:16 ` Phillip Wood
2019-06-13 4:05 ` [GSoC][PATCH v3 0/3] Teach cherry-pick/revert to skip commits Rohit Ashiwal
2019-06-13 4:05 ` [GSoC][PATCH v3 1/3] sequencer: add advice for revert Rohit Ashiwal
2019-06-13 17:45 ` Phillip Wood
2019-06-13 19:21 ` Martin Ågren
2019-06-13 20:59 ` Junio C Hamano
2019-06-14 3:44 ` Rohit Ashiwal
2019-06-14 3:43 ` Rohit Ashiwal
2019-06-13 4:05 ` [GSoC][PATCH v3 2/3] cherry-pick/revert: add --skip option Rohit Ashiwal
2019-06-13 17:56 ` Junio C Hamano
2019-06-13 19:57 ` Junio C Hamano [this message]
2019-06-14 3:48 ` Rohit Ashiwal
2019-06-14 3:45 ` Rohit Ashiwal
2019-06-14 15:58 ` Junio C Hamano
2019-06-16 7:03 ` Rohit Ashiwal
2019-06-13 17:59 ` Phillip Wood
2019-06-13 4:05 ` [GSoC][PATCH v3 3/3] cherry-pick/revert: advise using --skip Rohit Ashiwal
2019-06-16 8:20 ` [GSoC][PATCH v4 0/4] [GSoC][PATCH 0/3] Teach cherry-pick/revert to skip commits Rohit Ashiwal
2019-06-16 8:20 ` [GSoC][PATCH v4 1/4] sequencer: add advice for revert Rohit Ashiwal
2019-06-17 5:51 ` Thomas Gummerer
2019-06-16 8:20 ` [GSoC][PATCH v4 2/4] sequencer: rename reset_for_rollback to reset_merge Rohit Ashiwal
2019-06-16 8:20 ` [GSoC][PATCH v4 3/4] cherry-pick/revert: add --skip option Rohit Ashiwal
2019-06-17 8:30 ` Thomas Gummerer
2019-06-16 8:20 ` [GSoC][PATCH v4 4/4] cherry-pick/revert: advise using --skip Rohit Ashiwal
2019-06-17 8:39 ` [GSoC][PATCH v4 0/4] [GSoC][PATCH 0/3] Teach cherry-pick/revert to skip commits Thomas Gummerer
2019-06-18 17:06 ` [GSoC][PATCH v5 0/5] " Rohit Ashiwal
2019-06-18 17:06 ` [GSoC][PATCH v5 1/5] sequencer: add advice for revert Rohit Ashiwal
2019-06-18 17:06 ` [GSoC][PATCH v5 2/5] sequencer: rename reset_for_rollback to reset_merge Rohit Ashiwal
2019-06-18 17:06 ` [GSoC][PATCH v5 3/5] sequencer: use argv_array in reset_merge Rohit Ashiwal
2019-06-18 17:06 ` [GSoC][PATCH v5 4/5] cherry-pick/revert: add --skip option Rohit Ashiwal
2019-06-20 3:40 ` Junio C Hamano
2019-06-20 9:46 ` Rohit Ashiwal
2019-06-20 9:57 ` Phillip Wood
2019-06-20 20:09 ` Junio C Hamano
2019-06-20 10:02 ` Phillip Wood
2019-06-20 10:34 ` Rohit Ashiwal
2019-06-20 11:42 ` Phillip Wood
2019-06-21 7:47 ` Rohit Ashiwal
2019-06-18 17:06 ` [GSoC][PATCH v5 5/5] cherry-pick/revert: advise using --skip Rohit Ashiwal
2019-06-21 9:17 ` [GSoC][PATCH v6 0/5] Teach cherry-pick/revert to skip commits Rohit Ashiwal
2019-06-21 9:17 ` [GSoC][PATCH v6 1/5] sequencer: add advice for revert Rohit Ashiwal
2019-06-21 9:17 ` [GSoC][PATCH v6 2/5] sequencer: rename reset_for_rollback to reset_merge Rohit Ashiwal
2019-06-21 9:17 ` [GSoC][PATCH v6 3/5] sequencer: use argv_array in reset_merge Rohit Ashiwal
2019-06-21 9:17 ` [GSoC][PATCH v6 4/5] cherry-pick/revert: add --skip option Rohit Ashiwal
2019-06-21 9:18 ` [GSoC][PATCH v6 5/5] cherry-pick/revert: advise using --skip Rohit Ashiwal
2019-06-21 19:09 ` [GSoC][PATCH v6 0/5] Teach cherry-pick/revert to skip commits Junio C Hamano
2019-06-23 20:03 ` [GSoC][PATCH v7 0/6] " Rohit Ashiwal
2019-06-23 20:03 ` [GSoC][PATCH v7 1/6] advice: add sequencerInUse config variable Rohit Ashiwal
2019-06-25 9:18 ` Thomas Gummerer
2019-06-23 20:03 ` [GSoC][PATCH v7 2/6] sequencer: add advice for revert Rohit Ashiwal
2019-06-29 14:05 ` Phillip Wood
2019-06-23 20:03 ` [GSoC][PATCH v7 3/6] sequencer: rename reset_for_rollback to reset_merge Rohit Ashiwal
2019-06-23 20:03 ` [GSoC][PATCH v7 4/6] sequencer: use argv_array in reset_merge Rohit Ashiwal
2019-06-23 20:03 ` [GSoC][PATCH v7 5/6] cherry-pick/revert: add --skip option Rohit Ashiwal
2019-06-23 20:03 ` [GSoC][PATCH v7 6/6] cherry-pick/revert: advise using --skip Rohit Ashiwal
2019-07-02 9:11 ` [GSoC][PATCH v8 0/5] Teach cherry-pick/revert to skip commits Rohit Ashiwal
2019-07-02 9:11 ` [GSoC][PATCH v8 1/5] sequencer: add advice for revert Rohit Ashiwal
2019-07-02 9:11 ` [GSoC][PATCH v8 2/5] sequencer: rename reset_for_rollback to reset_merge Rohit Ashiwal
2019-07-02 9:11 ` [GSoC][PATCH v8 3/5] sequencer: use argv_array in reset_merge Rohit Ashiwal
2019-07-02 9:11 ` [GSoC][PATCH v8 4/5] cherry-pick/revert: add --skip option Rohit Ashiwal
2019-07-02 9:11 ` [GSoC][PATCH v8 5/5] cherry-pick/revert: advise using --skip Rohit Ashiwal
2019-07-02 15:26 ` [GSoC][PATCH v8 0/5] Teach cherry-pick/revert to skip commits Phillip Wood
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