patchreplay: do not copy "gpgsign-sha256" header

> From: Phillip Wood <phillip.wood@dunelm.org.uk>
>
> When "git replay" replays a commit it copies the extended headers
> across from the original commit. However, if the original commit
> was signed, we do not want to copy the header associated with the
> signature is it wont be valid for the new commit. The code already
> knows to avoid coping the "gpgsig" header but does not know to avoid
> copying the "gpgsig-sha256" header.  Add that header to the list of
> exclusions to match what "git commit --amend" does.
>
> Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
> ---
> We should perhaps think about how we can centralize this list of
> exclusions as we now have three copies of it in builtin/commit.c,
> builtin/replay.c and sequencer.c.
>
> This patch is based on maint to make it easier to backport.
> Unfortunately that means it conflicts with ps/history which moves the
> code that's changed here to a new file. I'm happy to rebase on on top
> of that branch if we decide it is not worth backporting this.

>
> Base-Commit: 9a2fb147f2c61d0cab52c883e7e26f5b7948e3ed
> Published-As: https://github.com/phillipwood/git/releases/tag/pw%2Freplay-do-not-copy-gpgsig-sha256-header%2Fv1
> View-Changes-At: https://github.com/phillipwood/git/compare/9a2fb147f...4f04af579
> Fetch-It-Via: git fetch https://github.com/phillipwood/git pw/replay-do-not-copy-gpgsig-sha256-header/v1
>
>  builtin/replay.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/builtin/replay.c b/builtin/replay.c
> index 6172c8aacc9..d12e4d54872 100644
> --- a/builtin/replay.c
> +++ b/builtin/replay.c
> @@ -67,7 +67,7 @@ static struct commit *create_commit(struct repository *repo,
>  	const char *message = repo_logmsg_reencode(repo, based_on,
>  						   NULL, out_enc);
>  	const char *orig_message = NULL;
> -	const char *exclude_gpgsig[] = { "gpgsig", NULL };
> +	const char *exclude_gpgsig[] = { "gpgsig", "gpgsig-sha256", NULL };
>  
>  	commit_list_insert(parent, &parents);
>  	extra = read_commit_extra_headers(based_on, exclude_gpgsig);

> Phillip Wood <phillip.wood123@gmail.com> writes:
> 
> > From: Phillip Wood <phillip.wood@dunelm.org.uk>
> >
> > When "git replay" replays a commit it copies the extended headers
> > across from the original commit. However, if the original commit
> > was signed, we do not want to copy the header associated with the
> > signature is it wont be valid for the new commit. The code already
> > knows to avoid coping the "gpgsig" header but does not know to avoid
> > copying the "gpgsig-sha256" header.  Add that header to the list of
> > exclusions to match what "git commit --amend" does.
> >
> > Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
> > ---
> > We should perhaps think about how we can centralize this list of
> > exclusions as we now have three copies of it in builtin/commit.c,
> > builtin/replay.c and sequencer.c.

> > This patch is based on maint to make it easier to backport.
> > Unfortunately that means it conflicts with ps/history which moves the
> > code that's changed here to a new file. I'm happy to rebase on on top
> > of that branch if we decide it is not worth backporting this.
> 
> I'd rather give priority to fixes over new development.

>
> From: Phillip Wood <phillip.wood@dunelm.org.uk>
>
> When "git replay" replays a commit it copies the extended headers
> across from the original commit. However, if the original commit
> was signed, we do not want to copy the header associated with the
> signature is it wont be valid for the new commit. The code already
> knows to avoid coping the "gpgsig" header but does not know to avoid
> copying the "gpgsig-sha256" header.  Add that header to the list of
> exclusions to match what "git commit --amend" does.
>
> Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
> ---
> We should perhaps think about how we can centralize this list of
> exclusions as we now have three copies of it in builtin/commit.c,
> builtin/replay.c and sequencer.c.
>
> This patch is based on maint to make it easier to backport.
> Unfortunately that means it conflicts with ps/history which moves the
> code that's changed here to a new file. I'm happy to rebase on on top
> of that branch if we decide it is not worth backporting this.
>
> Base-Commit: 9a2fb147f2c61d0cab52c883e7e26f5b7948e3ed
> Published-As: https://github.com/phillipwood/git/releases/tag/pw%2Freplay-do-not-copy-gpgsig-sha256-header%2Fv1
> View-Changes-At: https://github.com/phillipwood/git/compare/9a2fb147f...4f04af579
> Fetch-It-Via: git fetch https://github.com/phillipwood/git pw/replay-do-not-copy-gpgsig-sha256-header/v1
>
>  builtin/replay.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/builtin/replay.c b/builtin/replay.c
> index 6172c8aacc9..d12e4d54872 100644
> --- a/builtin/replay.c
> +++ b/builtin/replay.c
> @@ -67,7 +67,7 @@ static struct commit *create_commit(struct repository *repo,
>         const char *message = repo_logmsg_reencode(repo, based_on,
>                                                    NULL, out_enc);
>         const char *orig_message = NULL;
> -       const char *exclude_gpgsig[] = { "gpgsig", NULL };
> +       const char *exclude_gpgsig[] = { "gpgsig", "gpgsig-sha256", NULL };
>
>         commit_list_insert(parent, &parents);
>         extra = read_commit_extra_headers(based_on, exclude_gpgsig);
> --
> 2.52.0.362.g884e03848a9