[PATCH] blame: report correct number of lines in progress when using ranges

[Edmundo Carmona Antoranz <eantoranz@xxxxxxxxx>]

When using ranges, use their sizes as the limit for progress
instead of the size of the full file.

Before:
$ git blame --progress builtin/blame.c > /dev/null
Blaming lines: 100% (1210/1210), done.
$ git blame --progress -L 100,120 -L 200,300 builtin/blame.c > /dev/null
Blaming lines:  10% (122/1210), done.
$

After:
$ ./git blame --progress builtin/blame.c > /dev/null
Blaming lines: 100% (1210/1210), done.
$ ./git blame --progress -L 100,120 -L 200,300 builtin/blame.c > /dev/null
Blaming lines: 100% (122/122), done.
$

Signed-off-by: Edmundo Carmona Antoranz <eantoranz@xxxxxxxxx>
---
 builtin/blame.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/builtin/blame.c b/builtin/blame.c
index 8d15b68afc..e33372c56b 100644
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -898,6 +898,7 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
 	unsigned int range_i;
 	long anchor;
 	const int hexsz = the_hash_algo->hexsz;
+	long num_lines = 0;
 
 	setup_default_color_by_age();
 	git_config(git_blame_config, &output_option);
@@ -1129,7 +1130,10 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
 	for (range_i = ranges.nr; range_i > 0; --range_i) {
 		const struct range *r = &ranges.ranges[range_i - 1];
 		ent = blame_entry_prepend(ent, r->start, r->end, o);
+		num_lines += (r->end - r->start);
 	}
+	if (!num_lines)
+		num_lines = sb.num_lines;
 
 	o->suspects = ent;
 	prio_queue_put(&sb.commits, o->commit);
@@ -1158,7 +1162,7 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
 	sb.found_guilty_entry = &found_guilty_entry;
 	sb.found_guilty_entry_data = &pi;
 	if (show_progress)
-		pi.progress = start_delayed_progress(_("Blaming lines"), sb.num_lines);
+		pi.progress = start_delayed_progress(_("Blaming lines"), num_lines);
 
 	assign_blame(&sb, opt);
 
-- 
2.35.1