Re: [PATCH v7 4/8] sequencer.c: remove duplicate code

> Since we implemented get_cleanup_mode, we had some duplicate code in
> git_sequencer_config which essentially performed the same operations.
> Refactor git_sequencer_config to take advantage of the logic already in
> get_cleanup_mode.
> 
> Note that we had to introduce a separate argument to get_cleanup_mode
> indicating whether to die or not on an invalid value. This is because if
> we are parsing a config, we do not want to die but instead, we only want
> to warn the user, whereas if we are parsing a command-line option, we
> would like to actually die.
> 
> Finally, this is almost a no-op refactor but not quite. Previously, in
> the case that an invalid value is presented, default_msg_cleanup would
> not be set. We change the behaviour so that default_msg_cleanup will now
> take on the value as if "default" were provided as the cleanup_arg.
> 
> Signed-off-by: Denton Liu <liu.denton@gmail.com>
> ---
>   builtin/commit.c |  2 +-
>   sequencer.c      | 20 +++++++-------------
>   sequencer.h      |  2 +-
>   3 files changed, 9 insertions(+), 15 deletions(-)
> 
> diff --git a/builtin/commit.c b/builtin/commit.c
> index 0df15e4851..81e3bd21ca 100644
> --- a/builtin/commit.c
> +++ b/builtin/commit.c
> @@ -1172,7 +1172,7 @@ static int parse_and_validate_options(int argc, const char *argv[],
>   		die(_("Only one of --include/--only/--all/--interactive/--patch can be used."));
>   	if (argc == 0 && (also || (only && !amend && !allow_empty)))
>   		die(_("No paths with --include/--only does not make sense."));
> -	cleanup_mode = get_cleanup_mode(cleanup_arg, use_editor);
> +	cleanup_mode = get_cleanup_mode(cleanup_arg, use_editor, 1);
>   
>   	handle_untracked_files_arg(s);
>   
> diff --git a/sequencer.c b/sequencer.c
> index 224c823b43..612621f221 100644
> --- a/sequencer.c
> +++ b/sequencer.c
> @@ -172,17 +172,7 @@ static int git_sequencer_config(const char *k, const char *v, void *cb)
>   		if (status)
>   			return status;
>   
> -		if (!strcmp(s, "verbatim"))
> -			opts->default_msg_cleanup = COMMIT_MSG_CLEANUP_NONE;
> -		else if (!strcmp(s, "whitespace"))
> -			opts->default_msg_cleanup = COMMIT_MSG_CLEANUP_SPACE;
> -		else if (!strcmp(s, "strip"))
> -			opts->default_msg_cleanup = COMMIT_MSG_CLEANUP_ALL;
> -		else if (!strcmp(s, "scissors"))
> -			opts->default_msg_cleanup = COMMIT_MSG_CLEANUP_SPACE;
> -		else
> -			warning(_("invalid commit message cleanup mode '%s'"),
> -				  s);
> +		opts->default_msg_cleanup = get_cleanup_mode(s, 0, 0);
>   
>   		free((char *)s);
>   		return status;
> @@ -512,7 +502,7 @@ static int fast_forward_to(struct repository *r,
>   }
>   
>   enum commit_msg_cleanup_mode get_cleanup_mode(const char *cleanup_arg,
> -	int use_editor)
> +	int use_editor, int die_on_error)
>   {
>   	if (!cleanup_arg || !strcmp(cleanup_arg, "default"))
>   		return use_editor ? COMMIT_MSG_CLEANUP_ALL :
> @@ -526,7 +516,11 @@ enum commit_msg_cleanup_mode get_cleanup_mode(const char *cleanup_arg,
>   	else if (!strcmp(cleanup_arg, "scissors"))
>   		return use_editor ? COMMIT_MSG_CLEANUP_SCISSORS :
>   				    COMMIT_MSG_CLEANUP_SPACE;
> -	else
> +	else if (!die_on_error) {
> +		warning(_("Invalid cleanup mode %s, falling back to default"), cleanup_arg);

> +		return use_editor ? COMMIT_MSG_CLEANUP_ALL :
> +				    COMMIT_MSG_CLEANUP_SPACE;
> +	} else
>   		die(_("Invalid cleanup mode %s"), cleanup_arg);
>   }
>   
> diff --git a/sequencer.h b/sequencer.h
> index eb9bd97ef3..e7908f558e 100644
> --- a/sequencer.h
> +++ b/sequencer.h
> @@ -117,7 +117,7 @@ void append_signoff(struct strbuf *msgbuf, size_t ignore_footer, unsigned flag);
>   
>   void append_conflicts_hint(struct index_state *istate, struct strbuf *msgbuf);
>   enum commit_msg_cleanup_mode get_cleanup_mode(const char *cleanup_arg,
> -	int use_editor);
> +	int use_editor, int die_on_error);
>   
>   void cleanup_message(struct strbuf *msgbuf,
>   	enum commit_msg_cleanup_mode cleanup_mode, int verbose);
>