Reworked hack

gRPC-Core.podspec

@@ -1387,8 +1387,15 @@ Pod::Spec.new do |s|
 
   # TODO (mxyan): Instead of this hack, add include path "third_party" to C core's include path?
   s.prepare_command = <<-END_OF_COMMAND
-    find src/core/ -type f ! -path '*.grpc_back' -print0 | xargs -0 -L1 sed -E -i'.grpc_back' 's;#include "(pb(_.*)?\\.h)";#include <nanopb/\\1>;g'
-    find src/core/ -type f -path '*.grpc_back' -print0 | xargs -0 rm
-    find src/core/ -type f \\( -path '*.h' -or -path '*.cc' \\) -print0 | xargs -0 -L1 sed -E -i'.grpc_back' 's;#include <openssl/;#include <openssl_grpc/;g'
+    find src/core/ -type f -print0 | xargs -0 -L1 sed -E -i '' 's;#include "(pb(_.*)?\\.h)";#if COCOAPODS\\
+  #include <nanopb/\\1>\\
+#else\\
+  #include "\\1"\\
+#endif;g'
+    find src/core/ -type f \\( -path '*.h' -or -path '*.cc' \\) -print0 | xargs -0 -L1 sed -E -i '' 's;#include <openssl/(.*)>;#if COCOAPODS\\
+  #include <openssl_grpc/\\1>\\
+#else\\
+  #include <openssl/\\1>\\
+#endif;g'
   END_OF_COMMAND
 end

templates/gRPC-Core.podspec.template

@@ -211,9 +211,15 @@
     end
 
     # TODO (mxyan): Instead of this hack, add include path "third_party" to C core's include path?
-    s.prepare_command = <<-END_OF_COMMAND
-      find src/core/ -type f ! -path '*.grpc_back' -print0 | xargs -0 -L1 sed -E -i'.grpc_back' 's;#include "(pb(_.*)?\\.h)";#include <nanopb/\\1>;g'
-      find src/core/ -type f -path '*.grpc_back' -print0 | xargs -0 rm
-      find src/core/ -type f \\( -path '*.h' -or -path '*.cc' \\) -print0 | xargs -0 -L1 sed -E -i'.grpc_back' 's;#include <openssl/;#include <openssl_grpc/;g'
-    END_OF_COMMAND
+  s.prepare_command = <<-END_OF_COMMAND
+    find src/core/ -type f -print0 | xargs -0 -L1 sed -E -i '' 's;#include "(pb(_.*)?\\.h)";#if COCOAPODS\\
+  #include <nanopb/\\1>\\
+#else\\
+  #include "\\1"\\
+#endif;g'
+    find src/core/ -type f \\( -path '*.h' -or -path '*.cc' \\) -print0 | xargs -0 -L1 sed -E -i '' 's;#include <openssl/(.*)>;#if COCOAPODS\\
+  #include <openssl_grpc/\\1>\\
+#else\\
+  #include <openssl/\\1>\\
+#endif;g'
   end