From 8dd8bae0cd0b50ab9a9071b3adabe25b512250d1 Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Wed, 3 Jan 2024 09:35:03 -0800
Subject: [PATCH] config: empty value for RepeatableString resets the list

---
 src/config/Config.zig | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/config/Config.zig b/src/config/Config.zig
index 154e010a4..5d53c6c45 100644
--- a/src/config/Config.zig
+++ b/src/config/Config.zig
@@ -2213,6 +2213,13 @@ pub const RepeatableString = struct {
 
     pub fn parseCLI(self: *Self, alloc: Allocator, input: ?[]const u8) !void {
         const value = input orelse return error.ValueRequired;
+
+        // Empty value resets the list
+        if (value.len == 0) {
+            self.list.clearRetainingCapacity();
+            return;
+        }
+
         const copy = try alloc.dupeZ(u8, value);
         try self.list.append(alloc, copy);
     }
@@ -2248,8 +2255,10 @@ pub const RepeatableString = struct {
         var list: Self = .{};
         try list.parseCLI(alloc, "A");
         try list.parseCLI(alloc, "B");
-
         try testing.expectEqual(@as(usize, 2), list.list.items.len);
+
+        try list.parseCLI(alloc, "");
+        try testing.expectEqual(@as(usize, 0), list.list.items.len);
     }
 };