Revert "[objc] Turn on error exit in cocoapod pre-install (#27474)" (#27497)

This reverts commit c3759da7cc.

gRPC-C++.podspec

@@ -1528,7 +1528,6 @@ Pod::Spec.new do |s|
   end
 
   s.prepare_command = <<-END_OF_COMMAND
-    set -e
     find src/core -type f \\( -path '*.h' -or -path '*.cc' \\) -print0 | xargs -0 -L1 sed -E -i'.grpc_back' 's;#include <openssl/(.*)>;#if COCOAPODS==1\\\n  #include <openssl_grpc/\\1>\\\n#else\\\n  #include <openssl/\\1>\\\n#endif;g'
     find third_party/upb/ -type f \\( -name '*.h' -or -name '*.hpp' -or -name '*.c' -or -name '*.cc' \\) -print0 | xargs -0 -L1 sed -E -i'.grpc_back' 's;#include "third_party/(.*)";#if COCOAPODS==1\\\n  #include  "third_party/upb/third_party/\\1"\\\n#else\\\n  #include  "third_party/\\1"\\\n#endif;g'
     find src/core/ src/cpp/ third_party/upb/ -type f \\( -name '*.h' -or -name '*.hpp' -or -name '*.c' -or -name '*.cc' \\) -print0 | xargs -0 -L1 sed -E -i'.grpc_back' 's;#include "upb/(.*)";#if COCOAPODS==1\\\n  #include  "third_party/upb/upb/\\1"\\\n#else\\\n  #include  "upb/\\1"\\\n#endif;g'

gRPC-Core.podspec

@@ -2280,7 +2280,6 @@ 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
-    set -e
     find src/core -type f \\( -path '*.h' -or -path '*.cc' \\) -print0 | xargs -0 -L1 sed -E -i'.grpc_back' 's;#include <openssl/(.*)>;#if COCOAPODS==1\\\n  #include <openssl_grpc/\\1>\\\n#else\\\n  #include <openssl/\\1>\\\n#endif;g'
     find third_party/upb/ -type f \\( -name '*.h' -or -name '*.hpp' -or -name '*.c' -or -name '*.cc' \\) -print0 | xargs -0 -L1 sed -E -i'.grpc_back' 's;#include "third_party/(.*)";#if COCOAPODS==1\\\n  #include  "third_party/upb/third_party/\\1"\\\n#else\\\n  #include  "third_party/\\1"\\\n#endif;g'
     find src/core/ src/cpp/ third_party/upb/ -type f \\( -name '*.h' -or -name '*.hpp' -or -name '*.c' -or -name '*.cc' \\) -print0 | xargs -0 -L1 sed -E -i'.grpc_back' 's;#include "upb/(.*)";#if COCOAPODS==1\\\n  #include  "third_party/upb/upb/\\1"\\\n#else\\\n  #include  "upb/\\1"\\\n#endif;g'

src/objective-c/!ProtoCompiler-gRPCCppPlugin.podspec

@@ -112,7 +112,6 @@ Pod::Spec.new do |s|
   # present in this pod's directory. We use that knowledge to check for the existence of the file
   # and, if absent, compile the plugin from the local sources.
   s.prepare_command = <<-CMD
-    set -e
     #{bazel} build //src/compiler:grpc_cpp_plugin
   CMD
 end

src/objective-c/!ProtoCompiler-gRPCPlugin.podspec

@@ -121,7 +121,6 @@ Pod::Spec.new do |s|
   # present in this pod's directory. We use that knowledge to check for the existence of the file
   # and, if absent, compile the plugin from the local sources.
   s.prepare_command = <<-CMD
-    set -e
     if [ ! -f #{plugin} ]; then
       #{bazel} build //src/compiler:grpc_objective_c_plugin
     fi

src/objective-c/!ProtoCompiler.podspec

@@ -121,9 +121,8 @@ Pod::Spec.new do |s|
   # and, if absent, build it from the local sources.
   repo_root = '../..'
   bazel = "#{repo_root}/tools/bazel"
-
+  
   s.prepare_command = <<-CMD
-    set -e
     if [ ! -f bin/protoc ]; then
       #{bazel} build @com_google_protobuf//:protoc
     else

src/objective-c/BoringSSL-GRPC.podspec

@@ -152,7 +152,6 @@ Pod::Spec.new do |s|
   end
 
   s.prepare_command = <<-END_OF_COMMAND
-    set -e
     # Add a module map and an umbrella header
     mkdir -p src/include/openssl
     cat > src/include/openssl/umbrella.h <<EOF

templates/gRPC-C++.podspec.template

@@ -201,7 +201,6 @@
     end
 
     s.prepare_command = <<-END_OF_COMMAND
-      set -e
       find src/core -type f \\( -path '*.h' -or -path '*.cc' \\) -print0 | xargs -0 -L1 sed -E -i'.grpc_back' 's;#include <openssl/(.*)>;#if COCOAPODS==1\\\n  #include <openssl_grpc/\\1>\\\n#else\\\n  #include <openssl/\\1>\\\n#endif;g'
       find third_party/upb/ -type f \\( -name '*.h' -or -name '*.hpp' -or -name '*.c' -or -name '*.cc' \\) -print0 | xargs -0 -L1 sed -E -i'.grpc_back' 's;#include "third_party/(.*)";#if COCOAPODS==1\\\n  #include  "third_party/upb/third_party/\\1"\\\n#else\\\n  #include  "third_party/\\1"\\\n#endif;g'
       find src/core/ src/cpp/ third_party/upb/ -type f \\( -name '*.h' -or -name '*.hpp' -or -name '*.c' -or -name '*.cc' \\) -print0 | xargs -0 -L1 sed -E -i'.grpc_back' 's;#include "upb/(.*)";#if COCOAPODS==1\\\n  #include  "third_party/upb/upb/\\1"\\\n#else\\\n  #include  "upb/\\1"\\\n#endif;g'

templates/gRPC-Core.podspec.template

@@ -249,7 +249,6 @@
 
     # TODO (mxyan): Instead of this hack, add include path "third_party" to C core's include path?
     s.prepare_command = <<-END_OF_COMMAND
-      set -e
       find src/core -type f \\( -path '*.h' -or -path '*.cc' \\) -print0 | xargs -0 -L1 sed -E -i'.grpc_back' 's;#include <openssl/(.*)>;#if COCOAPODS==1\\\n  #include <openssl_grpc/\\1>\\\n#else\\\n  #include <openssl/\\1>\\\n#endif;g'
       find third_party/upb/ -type f \\( -name '*.h' -or -name '*.hpp' -or -name '*.c' -or -name '*.cc' \\) -print0 | xargs -0 -L1 sed -E -i'.grpc_back' 's;#include "third_party/(.*)";#if COCOAPODS==1\\\n  #include  "third_party/upb/third_party/\\1"\\\n#else\\\n  #include  "third_party/\\1"\\\n#endif;g'
       find src/core/ src/cpp/ third_party/upb/ -type f \\( -name '*.h' -or -name '*.hpp' -or -name '*.c' -or -name '*.cc' \\) -print0 | xargs -0 -L1 sed -E -i'.grpc_back' 's;#include "upb/(.*)";#if COCOAPODS==1\\\n  #include  "third_party/upb/upb/\\1"\\\n#else\\\n  #include  "upb/\\1"\\\n#endif;g'

templates/src/objective-c/!ProtoCompiler-gRPCCppPlugin.podspec.template

@@ -114,7 +114,6 @@
     # present in this pod's directory. We use that knowledge to check for the existence of the file
     # and, if absent, compile the plugin from the local sources.
     s.prepare_command = <<-CMD
-      set -e
       #{bazel} build //src/compiler:grpc_cpp_plugin
     CMD
   end

templates/src/objective-c/!ProtoCompiler-gRPCPlugin.podspec.template

@@ -123,7 +123,6 @@
     # present in this pod's directory. We use that knowledge to check for the existence of the file
     # and, if absent, compile the plugin from the local sources.
     s.prepare_command = <<-CMD
-      set -e
       if [ ! -f #{plugin} ]; then
         #{bazel} build //src/compiler:grpc_objective_c_plugin
       fi

templates/src/objective-c/!ProtoCompiler.podspec.template

@@ -1,7 +1,7 @@
 %YAML 1.2
 --- |
   # Proto Compiler CocoaPods podspec
-
+  
   # Copyright 2016, Google Inc.
   # All rights reserved.
   #
@@ -30,7 +30,7 @@
   # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
+  
   Pod::Spec.new do |s|
     # This pod is only a utility that will be used by other pods _at install time_ (not at compile
     # time). Other pods can access it in their `prepare_command` script, under <pods_root>/<pod name>.
@@ -52,21 +52,21 @@
       :type => 'New BSD',
       :text => <<-LICENSE
         This license applies to all parts of Protocol Buffers except the following:
-
+  
         - Atomicops support for generic gcc, located in
           src/google/protobuf/stubs/atomicops_internals_generic_gcc.h.
           This file is copyrighted by Red Hat Inc.
-
+  
         - Atomicops support for AIX/POWER, located in
           src/google/protobuf/stubs/atomicops_internals_power.h.
           This file is copyrighted by Bloomberg Finance LP.
-
+  
         Copyright 2014, Google Inc.  All rights reserved.
-
+  
         Redistribution and use in source and binary forms, with or without
         modification, are permitted provided that the following conditions are
         met:
-
+  
             * Redistributions of source code must retain the above copyright
         notice, this list of conditions and the following disclaimer.
             * Redistributions in binary form must reproduce the above
@@ -76,7 +76,7 @@
             * Neither the name of Google Inc. nor the names of its
         contributors may be used to endorse or promote products derived from
         this software without specific prior written permission.
-
+  
         THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
         "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
         LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -88,7 +88,7 @@
         THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
         (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
         OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
+  
         Code generated by the Protocol Buffer compiler is owned by the owner
         of the input file used when generating it.  This code is not
         standalone and requires a support library to be linked with it.  This
@@ -97,7 +97,7 @@
     }
     # "The name and email addresses of the library maintainers, not the Podspec maintainer."
     s.authors  = { 'The Protocol Buffers contributors' => 'protobuf@googlegroups.com' }
-
+  
     repo = 'google/protobuf'
     file = "protoc-#{v}-osx-x86_64.zip"
     s.source = {
@@ -105,10 +105,10 @@
       # TODO(jcanizales): Add sha1 or sha256
       # :sha1 => '??',
     }
-
+  
     s.preserve_paths = 'protoc',
                        'google/**/*.proto' # Well-known protobuf types
-
+  
     # Restrict the protobuf runtime version to the one supported by this version of protoc.
     s.dependency 'Protobuf', '~> 3.0'
     # For the Protobuf dependency not to complain:
@@ -116,16 +116,15 @@
     s.osx.deployment_target = '10.10'
     s.tvos.deployment_target = '10.0'
     s.watchos.deployment_target = '4.0'
-
+  
     # This is only for local development of protoc: If the Podfile brings this pod from a local
     # directory using `:path`, CocoaPods won't download the zip file and so the compiler won't be
     # present in this pod's directory. We use that knowledge to check for the existence of the file
     # and, if absent, build it from the local sources.
     repo_root = '../..'
     bazel = "#{repo_root}/tools/bazel"
-
+    
     s.prepare_command = <<-CMD
-      set -e
       if [ ! -f bin/protoc ]; then
         #{bazel} build @com_google_protobuf//:protoc
       else

templates/src/objective-c/BoringSSL-GRPC.podspec.template

@@ -182,7 +182,6 @@
     end
 
     s.prepare_command = <<-END_OF_COMMAND
-      set -e
       # Add a module map and an umbrella header
       mkdir -p src/include/openssl
       cat > src/include/openssl/umbrella.h <<EOF