Re: [PATCH] sequencer: fix error message on failure to copy SQUASH_MSG

[Phillip Wood <phillip.wood123@gmail.com>]

On 03/09/2023 16:11, Oswald Buddenhagen wrote:
> The message talked about renaming, while the actual action is copying.
> This was introduced by 6e98de72c ("sequencer (rebase -i): add support
> for the 'fixup' and 'squash' commands", 2017-01-02).
> 
> Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
> 
> ---
> i didn't try verifying whether the action shouldn't be actually be a
> move, as i'm getting lost in this forest of files.

This looks good, thanks. I think copying the file is OK. We're creating 
.git/SQUASH_MSG as a convenience in case the user decides to commit the 
conflict resolution themselves rather than leaving it to "rebase 
--continue". I don't think we reuse the contents of 
rebase_path_squash_msg() when tho rebase continues but copying it 
certainly isn't wrong and we're not in a hot path where we need to worry 
about the cost of copying a small file.

Best Wishes

Phillip

> Cc: Johannes Schindelin <johannes.schindelin@gmx.de>
> Cc: Phillip Wood <phillip.wood123@gmail.com>
> Cc: Junio C Hamano <gitster@pobox.com>
> 
> ---
> totally on a tangent, does someone feel like teaching copy_file() to try
> ioctl(FICLONE) (i.e., reflink) first?
> ---
>   sequencer.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/sequencer.c b/sequencer.c
> index a66dcf8ab2..2f3d7d4eee 100644
> --- a/sequencer.c
> +++ b/sequencer.c
> @@ -2320,7 +2320,7 @@ static int do_pick_commit(struct repository *r,
>   			const char *dest = git_path_squash_msg(r);
>   			unlink(dest);
>   			if (copy_file(dest, rebase_path_squash_msg(), 0666)) {
> -				res = error(_("could not rename '%s' to '%s'"),
> +				res = error(_("could not copy '%s' to '%s'"),
>   					    rebase_path_squash_msg(), dest);
>   				goto leave;
>   			}