commands: teach track how to handle empty lines in .gitattributes

commands/command_track.go

@@ -119,6 +119,10 @@ ArgsLoop:
 		for scanner.Scan() {
 			line := scanner.Text()
 			fields := strings.Fields(line)
+			if len(fields) < 1 {
+				continue
+			}
+
 			pattern := fields[0]
 			if newline, ok := changedAttribLines[pattern]; ok {
 				// Replace this line (newline already embedded)

test/test-track.sh

@@ -12,6 +12,13 @@ begin_test "track"
   cd track
   git init
 
+  echo "###############################################################################
+# Set default behavior to automatically normalize line endings.
+###############################################################################
+* text=auto
+
+#*.cs     diff=csharp" > .gitattributes
+
   # track *.jpg once
   git lfs track "*.jpg" | grep "Tracking \*.jpg"
   assert_attributes_count "jpg" "filter=lfs" 1
@@ -374,4 +381,3 @@ begin_test "track lockable read-only/read-write"
 
 )
 end_test
-