Fix some more diff options changes.

This fixes various problems in the new diff options code.

 - Fix --cc/-c --patch; it showed two-tree diff used internally.

 - Use "---\n" only where it matters -- that is, use it
   immediately after the commit log text when we show a
   commit log and something else before the patch text.

 - Do not output spurious extra "\n"; have an extra newline
   after the commit log text always when we have diff output and
   we are not doing oneline.

 - When running a pickaxe you need to go recursive.

Signed-off-by: Junio C Hamano <junkio@cox.net>

builtin-diff-tree.c

@@ -72,7 +72,6 @@ int cmd_diff_tree(int argc, const char **argv, char **envp)
 	init_revisions(opt);
 	opt->abbrev = 0;
 	opt->diff = 1;
-	opt->diffopt.msg_sep = "---\n";
 	argc = setup_revisions(argc, argv, opt, NULL);
 
 	while (--argc > 0) {

combine-diff.c

@@ -835,31 +835,33 @@ void diff_tree_combined(const unsigned char *sha1,
 	struct diff_options *opt = &rev->diffopt;
 	struct diff_options diffopts;
 	struct combine_diff_path *p, *paths = NULL;
-	int i, num_paths;
+	int i, num_paths, needsep, show_log_first;
 
 	diffopts = *opt;
-	diffopts.output_format &= ~(DIFF_FORMAT_RAW | DIFF_FORMAT_DIFFSTAT);
+	diffopts.output_format = DIFF_FORMAT_NO_OUTPUT;
 	diffopts.recursive = 1;
 
+	show_log_first = rev->loginfo;
+	needsep = 0;
 	/* find set of paths that everybody touches */
 	for (i = 0; i < num_parent; i++) {
 		/* show stat against the first parent even
 		 * when doing combined diff.
 		 */
 		if (i == 0 && opt->output_format & DIFF_FORMAT_DIFFSTAT)
-			diffopts.output_format |= DIFF_FORMAT_DIFFSTAT;
+			diffopts.output_format = DIFF_FORMAT_DIFFSTAT;
 		else
-			diffopts.output_format |= DIFF_FORMAT_NO_OUTPUT;
+			diffopts.output_format = DIFF_FORMAT_NO_OUTPUT;
 		diff_tree_sha1(parent[i], sha1, "", &diffopts);
 		diffcore_std(&diffopts);
 		paths = intersect_paths(paths, i, num_parent);
 
-		if (opt->output_format & DIFF_FORMAT_DIFFSTAT && rev->loginfo)
+		if (show_log_first && i == 0) {
 			show_log(rev, opt->msg_sep);
-
+			if (rev->verbose_header && opt->output_format)
+				putchar(opt->line_termination);
+		}
 		diff_flush(&diffopts);
-		if (opt->output_format & DIFF_FORMAT_DIFFSTAT)
-			putchar('\n');
 	}
 
 	/* find out surviving paths */
@@ -875,9 +877,13 @@ void diff_tree_combined(const unsigned char *sha1,
 				if (p->len)
 					show_raw_diff(p, num_parent, rev);
 			}
-			putchar(opt->line_termination);
+			needsep = 1;
 		}
+		else if (opt->output_format & DIFF_FORMAT_DIFFSTAT)
+			needsep = 1;
 		if (opt->output_format & DIFF_FORMAT_PATCH) {
+			if (needsep)
+				putchar(opt->line_termination);
 			for (p = paths; p; p = p->next) {
 				if (p->len)
 					show_patch_diff(p, num_parent, dense,

diff.c

@@ -1424,7 +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->msg_sep = "";
 
 	options->change = diff_change;
 	options->add_remove = diff_addremove;
@@ -1455,6 +1455,11 @@ int diff_setup_done(struct diff_options *options)
 				      DIFF_FORMAT_DIFFSTAT |
 				      DIFF_FORMAT_CHECKDIFF))
 		options->recursive = 1;
+	/*
+	 * Also pickaxe would not work very well if you do not say recursive
+	 */
+	if (options->pickaxe)
+		options->recursive = 1;
 
 	if (options->detect_rename && options->rename_limit < 0)
 		options->rename_limit = diff_rename_limit_default;
@@ -2143,9 +2148,6 @@ void diff_flush(struct diff_options *options)
 	if (output_format & DIFF_FORMAT_DIFFSTAT) {
 		struct diffstat_t diffstat;
 
-		if (separator++)
-			putchar('\n');
-
 		memset(&diffstat, 0, sizeof(struct diffstat_t));
 		diffstat.xm.consume = diffstat_consume;
 		for (i = 0; i < q->nr; i++) {
@@ -2154,14 +2156,13 @@ void diff_flush(struct diff_options *options)
 				diff_flush_stat(p, options, &diffstat);
 		}
 		show_stats(&diffstat);
+		separator++;
 	}
 
 	if (output_format & DIFF_FORMAT_SUMMARY && !is_summary_empty(q)) {
-		if (separator++)
-			putchar('\n');
-
 		for (i = 0; i < q->nr; i++)
 			diff_summary(q->queue[i]);
+		separator++;
 	}
 
 	if (output_format & DIFF_FORMAT_PATCH) {

log-tree.c

@@ -164,9 +164,22 @@ int log_tree_diff_flush(struct rev_info *opt)
 		return 0;
 	}
 
-	if (opt->loginfo && !opt->no_commit_id)
+	if (opt->loginfo && !opt->no_commit_id) {
+		/* When showing a verbose header (i.e. log message),
+		 * and not in --pretty=oneline format, we would want
+		 * an extra newline between the end of log and the
+		 * output for readability.
+		 */
 		show_log(opt, opt->diffopt.msg_sep);
-
+		if (opt->verbose_header &&
+		    opt->commit_format != CMIT_FMT_ONELINE) {
+			int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
+			if ((pch & opt->diffopt.output_format) == pch)
+				printf("---%c", opt->diffopt.line_termination);
+			else
+				putchar(opt->diffopt.line_termination);
+		}
+	}
 	diff_flush(&opt->diffopt);
 	return 1;
 }