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From: Alban Gruin <alban.gruin@gmail.com>
To: phillip.wood@dunelm.org.uk
Cc: git@vger.kernel.org,
	Johannes Schindelin <Johannes.Schindelin@gmx.de>,
	Junio C Hamano <gitster@pobox.com>
Subject: Re: [PATCH 04/15] sequencer: refactor sequencer_add_exec_commands() to work on a todo_list
Date: Fri, 12 Oct 2018 14:23:32 +0200
Message-ID: <1861868.piMsbFIpbn@andromeda> (raw)
In-Reply-To: <10482114-7954-2d1d-1612-f2b559d4ca8f@talktalk.net>

Le 12/10/2018 à 11:54, Phillip Wood a écrit :
> On 11/10/2018 17:57, Alban Gruin wrote:
> > Hi Phillip,
> > 
> > thanks for taking the time to review my patches.
> > 
> > Le 11/10/2018 à 13:25, Phillip Wood a écrit :
> >> On 07/10/2018 20:54, Alban Gruin wrote:
> >>> @@ -4419,15 +4406,38 @@ int sequencer_add_exec_commands(const char
> >>> *commands)
> >>>       }
> >>>         /* insert or append final <commands> */
> >>> -    if (insert >= 0 && insert < todo_list.nr)
> >>> -        strbuf_insert(buf, todo_list.items[insert].offset_in_buf +
> >>> +    if (insert >= 0 && insert < todo_list->nr)
> >>> +        strbuf_insert(buf, todo_list->items[insert].offset_in_buf +
> >>>                     offset, commands, commands_len);
> >>>       else if (insert >= 0 || !offset)
> >>>           strbuf_add(buf, commands, commands_len);
> >>>   -    i = write_message(buf->buf, buf->len, todo_file, 0);
> >>> +    if (todo_list_parse_insn_buffer(buf->buf, todo_list))
> >>> +        BUG("unusable todo list");}
> >> 
> >> It is a shame to have to re-parse the todo list, I wonder how difficult
> >> it would be to adjust the todo_list item array as the exec commands are
> >> inserted. The same applies to the next couple of patches
> > 
> > Good question.
> > 
> > This function inserts an `exec' command after every `pick' command.
> > These commands are stored in a dynamically allocated list, grew with
> > ALLOW_GROW().
> > 
> > If we want to keep the current structure, we would have to grow the size
> > of the list by 1 and move several element to the end every time we want
> > to add an `exec' command.  It would not be very effective.  Perhaps I
> > should use a linked list here, instead.  It may also work well with
> > rearrange_squash() and skip_unnecessary_picks().
> > 
> > Maybe we could even get rid of the strbuf at some point.
> 
> Another way would be to use the strbuf as a string pool rather than a
> copy of the text of the file. There could be a write_todo_list()
> function that takes a todo list and some flags, iterates over the items
> in the todo list and writes the file. The flags would specify whether to
> append the todo help and whether to abbreviate the object ids (so there
> is no need for a separate call to transform_todos()). Then
> add_exec_commands() could allocate a new array of todo items which it
> builds up as it works through the original list and replaces the
> original list with the new one at the end. The text of the exec items
> can be added to the end of the strbuf (we only need one copy of the exec
> text with this scheme). rearrange_squash() can use a temporary array to
> build a new list as well or just memmove() things but that might be
> slower if there is a lot of rearrangement to do. skip_unecessary_picks()
> could just set the current item to the one we want to start with.
> 

This sounds good, and it looks like the solution dscho proposed on IRC a few 
hours ago[0].  I will try to do this.

[0] http://colabti.org/irclogger/irclogger_log/git-devel?date=2018-10-12#l46

Cheers,
Alban





  reply index

Thread overview: 72+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-07 19:54 [PATCH 00/15] sequencer: refactor functions working " Alban Gruin
2018-10-07 19:54 ` [PATCH 01/15] sequencer: clear the number of items of a todo_list before parsing Alban Gruin
2018-10-07 19:54 ` [PATCH 02/15] sequencer: make the todo_list structure public Alban Gruin
2018-10-07 19:54 ` [PATCH 03/15] sequencer: refactor check_todo_list() to work on a todo_list Alban Gruin
2018-10-11 11:23   ` Phillip Wood
2018-10-07 19:54 ` [PATCH 04/15] sequencer: refactor sequencer_add_exec_commands() " Alban Gruin
2018-10-11 11:25   ` Phillip Wood
2018-10-11 16:57     ` Alban Gruin
2018-10-12  9:54       ` Phillip Wood
2018-10-12 12:23         ` Alban Gruin [this message]
2018-10-07 19:54 ` [PATCH 05/15] sequencer: refactor rearrange_squash() " Alban Gruin
2018-10-07 19:54 ` [PATCH 06/15] sequencer: refactor transform_todos() " Alban Gruin
2018-10-07 19:54 ` [PATCH 07/15] sequencer: make sequencer_make_script() write its script to a strbuf Alban Gruin
2018-10-12 10:01   ` SZEDER Gábor
2018-10-19  8:16     ` Junio C Hamano
2018-10-19  9:27       ` SZEDER Gábor
2018-10-07 19:54 ` [PATCH 08/15] sequencer: change complete_action() to use the refactored functions Alban Gruin
2018-10-11 13:51   ` Phillip Wood
2018-10-11 17:06     ` Alban Gruin
2018-10-07 19:54 ` [PATCH 09/15] sequencer: refactor skip_unnecessary_picks() to work on a todo_list Alban Gruin
2018-10-07 19:54 ` [PATCH 10/15] rebase-interactive: use todo_list_transform() in edit_todo_list() Alban Gruin
2018-10-11 15:16   ` Phillip Wood
2018-10-11 19:58     ` Alban Gruin
2018-10-07 19:54 ` [PATCH 11/15] rebase-interactive: append_todo_help() changes Alban Gruin
2018-10-07 19:54 ` [PATCH 12/15] rebase-interactive: rewrite edit_todo_list() to handle the initial edit Alban Gruin
2018-10-07 19:54 ` [PATCH 13/15] sequencer: use edit_todo_list() in complete_action() Alban Gruin
2018-10-07 19:54 ` [PATCH 14/15] sequencer: fix a call to error() in transform_todo_file() Alban Gruin
2018-10-07 19:54 ` [PATCH 15/15] rebase--interactive: move transform_todo_file() to rebase--interactive.c Alban Gruin
2018-10-07 20:51 ` [PATCH 00/15] sequencer: refactor functions working on a todo_list Alban Gruin
2018-10-27 21:29 ` [PATCH v2 00/16] " Alban Gruin
2018-10-27 21:29   ` [PATCH v2 01/16] sequencer: changes in parse_insn_buffer() Alban Gruin
2018-10-27 21:29   ` [PATCH v2 02/16] sequencer: make the todo_list structure public Alban Gruin
2018-10-27 21:29   ` [PATCH v2 03/16] sequencer: refactor transform_todos() to work on a todo_list Alban Gruin
2018-10-27 21:29   ` [PATCH v2 04/16] sequencer: introduce todo_list_write_to_file() Alban Gruin
2018-10-30 16:28     ` Phillip Wood
2018-11-01 23:31       ` Alban Gruin
2018-10-27 21:29   ` [PATCH v2 05/16] sequencer: refactor check_todo_list() to work on a todo_list Alban Gruin
2018-10-27 21:29   ` [PATCH v2 06/16] sequencer: refactor sequencer_add_exec_commands() " Alban Gruin
2018-10-30 16:47     ` Phillip Wood
2018-11-01 23:31       ` Alban Gruin
2018-11-02 10:09         ` Phillip Wood
2018-11-02 16:26           ` Alban Gruin
2018-11-02 17:09             ` Phillip Wood
2018-10-27 21:29   ` [PATCH v2 07/16] sequencer: refactor rearrange_squash() " Alban Gruin
2018-10-27 21:29   ` [PATCH v2 08/16] sequencer: make sequencer_make_script() write its script to a strbuf Alban Gruin
2018-10-27 21:29   ` [PATCH v2 09/16] sequencer: change complete_action() to use the refactored functions Alban Gruin
2018-10-27 21:29   ` [PATCH v2 10/16] sequencer: refactor skip_unnecessary_picks() to work on a todo_list Alban Gruin
2018-10-27 21:29   ` [PATCH v2 11/16] rebase-interactive: use todo_list_write_to_file() in edit_todo_list() Alban Gruin
2018-10-27 21:29   ` [PATCH v2 12/16] rebase-interactive: append_todo_help() changes Alban Gruin
2018-10-27 21:29   ` [PATCH v2 13/16] rebase-interactive: rewrite edit_todo_list() to handle the initial edit Alban Gruin
2018-10-27 21:29   ` [PATCH v2 14/16] sequencer: use edit_todo_list() in complete_action() Alban Gruin
2018-10-27 21:29   ` [PATCH v2 15/16] sequencer: fix a call to error() in transform_todo_file() Alban Gruin
2018-10-27 21:29   ` [PATCH v2 16/16] rebase--interactive: move transform_todo_file() to rebase--interactive.c Alban Gruin
2018-10-29  3:05   ` [PATCH v2 00/16] sequencer: refactor functions working on a todo_list Junio C Hamano
2018-10-29 15:34     ` Alban Gruin
2018-11-09  8:07   ` [PATCH v3 " Alban Gruin
2018-11-09  8:07     ` [PATCH v3 01/16] sequencer: changes in parse_insn_buffer() Alban Gruin
2018-11-09  8:07     ` [PATCH v3 02/16] sequencer: make the todo_list structure public Alban Gruin
2018-11-09  8:07     ` [PATCH v3 03/16] sequencer: refactor transform_todos() to work on a todo_list Alban Gruin
2018-11-09  8:07     ` [PATCH v3 04/16] sequencer: introduce todo_list_write_to_file() Alban Gruin
2018-11-09  8:07     ` [PATCH v3 05/16] sequencer: refactor check_todo_list() to work on a todo_list Alban Gruin
2018-11-09  8:07     ` [PATCH v3 06/16] sequencer: refactor sequencer_add_exec_commands() " Alban Gruin
2018-11-09  8:07     ` [PATCH v3 07/16] sequencer: refactor rearrange_squash() " Alban Gruin
2018-11-09  8:07     ` [PATCH v3 08/16] sequencer: make sequencer_make_script() write its script to a strbuf Alban Gruin
2018-11-09  8:07     ` [PATCH v3 09/16] sequencer: change complete_action() to use the refactored functions Alban Gruin
2018-11-09  8:07     ` [PATCH v3 10/16] sequencer: refactor skip_unnecessary_picks() to work on a todo_list Alban Gruin
2018-11-09  8:08     ` [PATCH v3 11/16] rebase-interactive: use todo_list_write_to_file() in edit_todo_list() Alban Gruin
2018-11-09  8:08     ` [PATCH v3 12/16] rebase-interactive: append_todo_help() changes Alban Gruin
2018-11-09  8:08     ` [PATCH v3 13/16] rebase-interactive: rewrite edit_todo_list() to handle the initial edit Alban Gruin
2018-11-09  8:08     ` [PATCH v3 14/16] sequencer: use edit_todo_list() in complete_action() Alban Gruin
2018-11-09  8:08     ` [PATCH v3 15/16] sequencer: fix a call to error() in transform_todo_file() Alban Gruin
2018-11-09  8:08     ` [PATCH v3 16/16] rebase--interactive: move transform_todo_file() to rebase--interactive.c Alban Gruin

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