[PATCH v4] blame: report correct number of lines in progress when using ranges

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When using ranges, use the range 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 +++++-
 t/annotate-tests.sh | 40 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 45 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);
 
diff --git a/t/annotate-tests.sh b/t/annotate-tests.sh
index 09e86f9ba0..cc01d89150 100644
--- a/t/annotate-tests.sh
+++ b/t/annotate-tests.sh
@@ -56,6 +56,10 @@ check_count () {
 	' "$@" <actual
 }
 
+get_progress_result () {
+	tr '\015' '\012' | tail -n 1
+}
+
 test_expect_success 'setup A lines' '
 	echo "1A quick brown fox jumps over the" >file &&
 	echo "lazy dog" >>file &&
@@ -604,3 +608,39 @@ test_expect_success 'blame -L X,-N (non-numeric N)' '
 test_expect_success 'blame -L ,^/RE/' '
 	test_must_fail $PROG -L1,^/99/ file
 '
+
+test_expect_success 'blame progress on a full file' '
+	cat >expect <<-\EOF &&
+	Blaming lines: 100% (10/10), done.
+	EOF
+
+	GIT_PROGRESS_DELAY=0 \
+	git blame --progress hello.c 2>stderr &&
+
+	get_progress_result <stderr >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'blame progress on a single range' '
+	cat >expect <<-\EOF &&
+	Blaming lines: 100% (4/4), done.
+	EOF
+
+	GIT_PROGRESS_DELAY=0 \
+	git blame --progress -L 3,6 hello.c 2>stderr &&
+
+	get_progress_result <stderr >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'blame progress on multiple ranges' '
+	cat >expect <<-\EOF &&
+	Blaming lines: 100% (7/7), done.
+	EOF
+
+	GIT_PROGRESS_DELAY=0 \
+	git blame --progress -L 3,6 -L 8,10 hello.c 2>stderr &&
+
+	get_progress_result <stderr >actual &&
+	test_cmp expect actual
+'
-- 
2.35.1




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