Use Cocoapods to manage nanopb

gRPC-Core.podspec

@@ -194,6 +194,7 @@ Pod::Spec.new do |s|
     ss.libraries = 'z'
     ss.dependency "#{s.name}/Interface", version
     ss.dependency 'BoringSSL', '~> 8.0'
+    ss.dependency 'nanopb'
 
     # To save you from scrolling, this is the last part of the podspec.
     ss.source_files = 'src/core/lib/profiling/timers.h',
@@ -448,10 +449,6 @@ Pod::Spec.new do |s|
                       'src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_client_stats.h',
                       'src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.h',
                       'src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h',
-                      'third_party/nanopb/pb.h',
-                      'third_party/nanopb/pb_common.h',
-                      'third_party/nanopb/pb_decode.h',
-                      'third_party/nanopb/pb_encode.h',
                       'src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver.h',
                       'src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.h',
                       'src/core/ext/filters/load_reporting/load_reporting.h',
@@ -695,9 +692,6 @@ Pod::Spec.new do |s|
                       'src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_client_stats.c',
                       'src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.c',
                       'src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c',
-                      'third_party/nanopb/pb_common.c',
-                      'third_party/nanopb/pb_decode.c',
-                      'third_party/nanopb/pb_encode.c',
                       'src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.c',
                       'src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.c',
                       'src/core/ext/filters/client_channel/resolver/dns/c_ares/dns_resolver_ares.c',
@@ -934,10 +928,6 @@ Pod::Spec.new do |s|
                               'src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_client_stats.h',
                               'src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.h',
                               'src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h',
-                              'third_party/nanopb/pb.h',
-                              'third_party/nanopb/pb_common.h',
-                              'third_party/nanopb/pb_decode.h',
-                              'third_party/nanopb/pb_encode.h',
                               'src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver.h',
                               'src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.h',
                               'src/core/ext/filters/load_reporting/load_reporting.h',

templates/gRPC-Core.podspec.template

@@ -43,7 +43,7 @@
       if lib.name in ("grpc", "gpr"):
         out += lib.get('headers', [])
         out += lib.get('src', [])
-    return out;
+    return [f for f in out if not f.startswith("third_party/nanopb/")]
 
   def grpc_public_headers(libs):
     out = []
@@ -57,7 +57,7 @@
     for lib in libs:
       if lib.name in ("grpc", "gpr"):
         out += lib.get('headers', [])
-    return out
+    return [f for f in out if not f.startswith("third_party/nanopb/")]
 
   def ruby_multiline_list(files, indent):
     return (',\n' + indent*' ').join('\'%s\'' % f for f in files)
@@ -153,6 +153,7 @@
       ss.libraries = 'z'
       ss.dependency "#{s.name}/Interface", version
       ss.dependency 'BoringSSL', '~> 8.0'
+      ss.dependency 'nanopb'
 
       # To save you from scrolling, this is the last part of the podspec.
       ss.source_files = ${ruby_multiline_list(grpc_private_files(libs), 22)}