Transforming gRPC.podspec to use build.json instead of globbing.

templates/gRPC.podspec.template

@@ -0,0 +1,117 @@
+Pod::Spec.new do |s|
+  s.name     = 'gRPC'
+  s.version  = '0.6.0'
+  s.summary  = 'gRPC client library for iOS/OSX'
+  s.homepage = 'http://www.grpc.io'
+  s.license  = 'New BSD'
+  s.authors  = { 'The gRPC contributors' => 'grpc-packages@google.com' }
+
+  # s.source = { :git => 'https://github.com/grpc/grpc.git',
+  #              :tag => 'release-0_9_1-objectivec-0.5.1' }
+
+  s.ios.deployment_target = '6.0'
+  s.osx.deployment_target = '10.8'
+  s.requires_arc = true
+
+  # Reactive Extensions library for iOS.
+  s.subspec 'RxLibrary' do |rs|
+    rs.source_files = 'src/objective-c/RxLibrary/*.{h,m}',
+                      'src/objective-c/RxLibrary/transformations/*.{h,m}',
+                      'src/objective-c/RxLibrary/private/*.{h,m}'
+    rs.private_header_files = 'src/objective-c/RxLibrary/private/*.h'
+  end
+
+  # Core cross-platform gRPC library, written in C.
+  s.subspec 'C-Core' do |cs|
+    cs.source_files = \
+% for lib in libs:
+% if lib.build in ("all"):
+% for hdr in lib.get("headers", []):
+'${hdr}', \
+% endfor
+% for hdr in lib.get("public_headers", []):
+'${hdr}', \
+% endfor
+% for src in lib.src:
+'${src}', \
+% endfor
+% endif
+% endfor
+
+    cs.private_header_files = \
+% for lib in libs:
+% if lib.build in ("all"):
+% for hdr in lib.get("headers", []):
+'${hdr}', \
+% endfor
+% endif
+% endfor
+
+    cs.header_mappings_dir = '.'
+    # The core library includes its headers as either "src/core/..." or "grpc/...", meaning we have
+    # to tell XCode to look for headers under the "include" subdirectory too.
+    #
+    # TODO(jcanizales): Instead of doing this, during installation move everything under
+    # "include/grpc" one directory up. The directory names under PODS_ROOT are implementation
+    # details of Cocoapods, and have changed in the past, breaking this podspec.
+    cs.xcconfig = { 'HEADER_SEARCH_PATHS' => '"$(PODS_ROOT)/Headers/Private/gRPC" ' +
+                                             '"$(PODS_ROOT)/Headers/Private/gRPC/include"' }
+    cs.compiler_flags = '-GCC_WARN_INHIBIT_ALL_WARNINGS', '-w'
+
+    cs.requires_arc = false
+    cs.libraries = 'z'
+    cs.dependency 'OpenSSL', '~> 1.0.200'
+  end
+
+  # This is a workaround for Cocoapods Issue #1437.
+  # It renames time.h and string.h to grpc_time.h and grpc_string.h.
+  # It needs to be here (top-level) instead of in the C-Core subspec because Cocoapods doesn't run
+  # prepare_command's of subspecs.
+  #
+  # TODO(jcanizales): Try out Todd Reed's solution at Issue #1437.
+  s.prepare_command = <<-CMD
+    DIR_TIME="grpc/support"
+    BAD_TIME="$DIR_TIME/time.h"
+    GOOD_TIME="$DIR_TIME/grpc_time.h"
+    grep -rl "$BAD_TIME" include/grpc src/core | xargs sed -i '' -e s@$BAD_TIME@$GOOD_TIME@g
+    if [ -f "include/$BAD_TIME" ];
+    then
+      mv -f "include/$BAD_TIME" "include/$GOOD_TIME"
+    fi
+
+    DIR_STRING="src/core/support"
+    BAD_STRING="$DIR_STRING/string.h"
+    GOOD_STRING="$DIR_STRING/grpc_string.h"
+    grep -rl "$BAD_STRING" include/grpc src/core | xargs sed -i '' -e s@$BAD_STRING@$GOOD_STRING@g
+    if [ -f "$BAD_STRING" ];
+    then
+      mv -f "$BAD_STRING" "$GOOD_STRING"
+    fi
+  CMD
+
+  # Objective-C wrapper around the core gRPC library.
+  s.subspec 'GRPCClient' do |gs|
+    gs.source_files = 'src/objective-c/GRPCClient/*.{h,m}',
+                      'src/objective-c/GRPCClient/private/*.{h,m}'
+    gs.private_header_files = 'src/objective-c/GRPCClient/private/*.h'
+    gs.compiler_flags = '-GCC_WARN_INHIBIT_ALL_WARNINGS', '-w'
+
+    gs.dependency 'gRPC/C-Core'
+    # TODO(jcanizales): Remove this when the prepare_command moves everything under "include/grpc"
+    # one directory up.
+    gs.xcconfig = { 'HEADER_SEARCH_PATHS' => '"$(PODS_ROOT)/Headers/Public/gRPC/include"' }
+    gs.dependency 'gRPC/RxLibrary'
+
+    # Certificates, to be able to establish TLS connections:
+    gs.resource_bundles = { 'gRPC' => ['etc/roots.pem'] }
+  end
+
+  # RPC library for ProtocolBuffers, based on gRPC
+  s.subspec 'ProtoRPC' do |ps|
+    ps.source_files = 'src/objective-c/ProtoRPC/*.{h,m}'
+
+    ps.dependency 'gRPC/GRPCClient'
+    ps.dependency 'gRPC/RxLibrary'
+    ps.dependency 'Protobuf', '~> 3.0.0-alpha-3'
+  end
+end