Re: [PATCH 2/3] rebase: help users when dying with `preserve-merges`

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On Thu, May 26 2022, Philip Oakley via GitGitGadget wrote:

> From: Philip Oakley <philipoakley@iee.email>
>
> Git will die if a "rebase --preserve-merges" is in progress.
> Users cannot --quit, --abort or --continue the rebase.
>
> Make the `rebase --abort` option available to allow users to remove
> traces of any preserve-merges rebase, even if they had upgraded
> during a rebase.
>
> One trigger was an unexpectedly difficult to resolve conflict, as
> reported on the `git-users` group.
> (https://groups.google.com/g/git-for-windows/c/3jMWbBlXXHM)
>
> Tell the user the options to resolve the problem manually.
>
> Signed-off-by: Philip Oakley <philipoakley@iee.email>
> ---
>  builtin/rebase.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/builtin/rebase.c b/builtin/rebase.c
> index 6ce7e98a6f1..aada25a8870 100644
> --- a/builtin/rebase.c
> +++ b/builtin/rebase.c
> @@ -1182,8 +1182,10 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
>  	} else if (is_directory(merge_dir())) {
>  		strbuf_reset(&buf);
>  		strbuf_addf(&buf, "%s/rewritten", merge_dir());
> -		if (is_directory(buf.buf)) {
> -			die("`rebase -p` is no longer supported");
> +		if (is_directory(buf.buf) && !(action == ACTION_ABORT)) {
> +			die("`rebase --preserve-merges` (-p) is no longer supported.\n"
> +			"Use `git rebase --abort` to terminate current rebase.\n"
> +			"Or downgrade to v2.33, or earlier, to complete the rebase.\n");
>  		} else {
>  			strbuf_reset(&buf);
>  			strbuf_addf(&buf, "%s/interactive", merge_dir());

Existing issue: No _(), shouldn't we add it?

I wonder if we should use die_message() + advise() in these cases,
i.e. stick to why we died in die_message() and have the advise() make
suggestions, as e4921d877ab (tracking branches: add advice to ambiguous
refspec error, 2022-04-01) does.

But then again adding new advice is currently a bit of an excercise in
boilerplate, and this seems fine for a transitory option.

I think you don't need to add a trailing \n though...




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