Add msg_sep to diff_options

Add msg_sep variable to struct diff_options.  msg_sep is printed after
commit message.  Default is "\n", format-patch sets it to "---\n".

This also removes the second argument from show_log() because all
callers derived it from the first argument:

    show_log(rev, rev->loginfo, ...

Signed-off-by: Timo Hirvonen <tihirvon@gmail.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>

builtin-log.c

@@ -175,6 +175,7 @@ int cmd_format_patch(int argc, const char **argv, char **envp)
 	rev.diff = 1;
 	rev.combine_merges = 0;
 	rev.ignore_merges = 1;
+	rev.diffopt.msg_sep = "---\n";
 
 	git_config(git_format_config);
 	rev.extra_headers = extra_headers;

combine-diff.c

@@ -701,7 +701,7 @@ static int show_patch_diff(struct combine_diff_path *elem, int num_parent,
 		const char *abb;
 
 		if (rev->loginfo)
-			show_log(rev, rev->loginfo, "\n");
+			show_log(rev, opt->msg_sep);
 		dump_quoted_path(dense ? "diff --cc " : "diff --combined ", elem->path);
 		printf("index ");
 		for (i = 0; i < num_parent; i++) {
@@ -769,7 +769,7 @@ static void show_raw_diff(struct combine_diff_path *p, int num_parent, struct re
 		inter_name_termination = 0;
 
 	if (rev->loginfo)
-		show_log(rev, rev->loginfo, "\n");
+		show_log(rev, opt->msg_sep);
 
 	if (opt->output_format & DIFF_FORMAT_RAW) {
 		offset = strlen(COLONS) - num_parent;
@@ -855,7 +855,8 @@ void diff_tree_combined(const unsigned char *sha1,
 		paths = intersect_paths(paths, i, num_parent);
 
 		if (opt->output_format & DIFF_FORMAT_DIFFSTAT && rev->loginfo)
-			show_log(rev, rev->loginfo, "---\n");
+			show_log(rev, opt->msg_sep);
+
 		diff_flush(&diffopts);
 		if (opt->output_format & DIFF_FORMAT_DIFFSTAT)
 			putchar('\n');

diff.c

@@ -1424,6 +1424,7 @@ void diff_setup(struct diff_options *options)
 	options->break_opt = -1;
 	options->rename_limit = -1;
 	options->context = 3;
+	options->msg_sep = "\n";
 
 	options->change = diff_change;
 	options->add_remove = diff_addremove;

diff.h

@@ -57,6 +57,7 @@ struct diff_options {
 	int rename_limit;
 	int setup;
 	int abbrev;
+	const char *msg_sep;
 	const char *stat_sep;
 	long xdl_opts;
 

log-tree.c

@@ -43,9 +43,10 @@ static int append_signoff(char *buf, int buf_sz, int at, const char *signoff)
 	return at;
 }
 
-void show_log(struct rev_info *opt, struct log_info *log, const char *sep)
+void show_log(struct rev_info *opt, const char *sep)
 {
 	static char this_header[16384];
+	struct log_info *log = opt->loginfo;
 	struct commit *commit = log->commit, *parent = log->parent;
 	int abbrev = opt->diffopt.abbrev;
 	int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
@@ -163,13 +164,9 @@ int log_tree_diff_flush(struct rev_info *opt)
 		return 0;
 	}
 
-	if (opt->loginfo && !opt->no_commit_id) {
-		if (opt->diffopt.output_format & DIFF_FORMAT_DIFFSTAT) {
-			show_log(opt, opt->loginfo,  "---\n");
-		} else {
-			show_log(opt, opt->loginfo,  "\n");
-		}
-	}
+	if (opt->loginfo && !opt->no_commit_id)
+		show_log(opt, opt->diffopt.msg_sep);
+
 	diff_flush(&opt->diffopt);
 	return 1;
 }
@@ -266,7 +263,7 @@ int log_tree_commit(struct rev_info *opt, struct commit *commit)
 	shown = log_tree_diff(opt, commit, &log);
 	if (!shown && opt->loginfo && opt->always_show_header) {
 		log.parent = NULL;
-		show_log(opt, opt->loginfo, "");
+		show_log(opt, "");
 		shown = 1;
 	}
 	opt->loginfo = NULL;

log-tree.h

@@ -11,6 +11,6 @@ void init_log_tree_opt(struct rev_info *);
 int log_tree_diff_flush(struct rev_info *);
 int log_tree_commit(struct rev_info *, struct commit *);
 int log_tree_opt_parse(struct rev_info *, const char **, int);
-void show_log(struct rev_info *opt, struct log_info *log, const char *sep);
+void show_log(struct rev_info *opt, const char *sep);
 
 #endif