From 2e9f1281f79c5447948324e564c99cd97e99f4fe Mon Sep 17 00:00:00 2001
From: jiangyanan <jiangyanan@hypergryph.com>
Date: Thu, 8 May 2025 11:40:34 +0800
Subject: protobuf.cpp rule: custom flags, pass through to protoc

---
 xmake/rules/protobuf/proto.lua | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/xmake/rules/protobuf/proto.lua b/xmake/rules/protobuf/proto.lua
index bebeb3105..76b471948 100644
--- a/xmake/rules/protobuf/proto.lua
+++ b/xmake/rules/protobuf/proto.lua
@@ -108,6 +108,7 @@ function buildcmd_pfile(target, batchcmds, sourcefile_proto, sourcekind, opt)
     local autogendir
     local public
     local grpc_cpp_plugin
+    local proto_args
     local fileconfig = target:fileconfig(sourcefile_proto)
     if fileconfig then
         public = fileconfig.proto_public
@@ -116,6 +117,8 @@ function buildcmd_pfile(target, batchcmds, sourcefile_proto, sourcekind, opt)
         -- @see https://github.com/xmake-io/xmake/issues/3678
         autogendir = fileconfig.proto_autogendir
         grpc_cpp_plugin = fileconfig.proto_grpc_cpp_plugin
+        -- custom args, pass through to protoc
+        proto_args = fileconfig.proto_args
     end
     local rootdir = autogendir and autogendir or path.join(target:autogendir(), "rules", "protobuf")
     local filename = path.basename(sourcefile_proto) .. ".pb" .. (sourcekind == "cxx" and ".cc" or "-c.c")
@@ -143,6 +146,16 @@ function buildcmd_pfile(target, batchcmds, sourcefile_proto, sourcekind, opt)
         table.insert(protoc_args, path(sourcefile_dir, function (p) return ("--grpc_out=") .. p end))
     end
 
+    if proto_args then
+        if type(proto_args) == "string" then
+            table.insert(protoc_args, proto_args)
+        else
+            for _, v in ipairs(proto_args) do
+                table.insert(protoc_args, v)
+            end
+        end
+    end
+
     -- add commands
     batchcmds:mkdir(sourcefile_dir)
     batchcmds:show_progress(
-- 
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