migrating compile script from zsh to bash

seekers/grpc/compile_protos.sh

@@ -1,21 +1,23 @@
-#!/bin/zsh
+#!/bin/bash
 
 git submodule update --init --recursive
 
 rm -rf stubs
 mkdir stubs
 
+mapfile -d '' proto_src_files < <(find proto/src/main/proto -name '*.proto' -print0)
+
 python -m grpc_tools.protoc \
   --python_out=stubs \
   --grpc_python_out=stubs \
   --proto_path=proto/src/main/proto \
   --mypy_out=stubs \
-  proto/src/main/proto/**/*.proto
+  "${proto_src_files[@]}"
 
 # invoke proletariat to fix broken imports
 
 protol \
   --create-package \
   --in-place \
   --python-out stubs \
-  protoc --proto-path=proto/src/main/proto proto/src/main/proto/**/*.proto
+  protoc --proto-path=proto/src/main/proto "${proto_src_files[@]}"