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 <redacted>
---
  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);