grpc/templates/gRPC-Core.podspec.template

%YAML 1.2
--- |
  # This file has been automatically generated from a template file.
  # Please make modifications to `templates/gRPC-Core.podspec.template`
  # instead. This file can be regenerated from the template by running
  # `tools/buildgen/generate_projects.sh`.

  # gRPC Core CocoaPods podspec
  #
  # Copyright 2015 gRPC authors.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  <%
  lib_maps = {lib.name: lib for lib in libs}

  def ruby_multiline_list(files, indent):
    return (',\n' + indent*' ').join('\'%s\'' % f for f in files)

  def is_absl_lib(target_name):
    return target_name.startswith("absl/")

  def get_absl_spec_name(label):
    # e.g. absl/apple:banana -> abseil/apple/banana
    return "abseil/" + label[5:].replace(":", "/")

  def lib_and_transitive_deps(lib):
    return list(sorted(set({lib} | set(lib_maps[lib].transitive_deps))))

  def non_abseil_lib_and_transitive_deps(lib):
    return [l for l in lib_and_transitive_deps(lib) if not is_absl_lib(l)]

  def list_abseil_specs(lib):
    # This returns a list of abseil specs which the given lib and
    # its non-abseil transitive dependencies depend on.
    # As a result, internal abseil libraries are excluded from the result.
    absl_specs = set()
    for lib_name in lib_and_transitive_deps(lib):
      if is_absl_lib(lib_name): continue
      for dep in lib_maps[lib_name].deps:
        if is_absl_lib(dep):
          absl_specs.add(get_absl_spec_name(dep))
    return list(sorted(absl_specs))

  def list_lib_files(lib, fields):
    files = set()
    for lib_name in non_abseil_lib_and_transitive_deps(lib):
      lib = lib_maps[lib_name]
      for field in fields:
        files.update(lib.get(field, []))
    return list(sorted(files))

  grpc_private_files = list_lib_files("grpc", ("headers", "src"))
  grpc_public_headers = list_lib_files("grpc", ("public_headers",))
  grpc_private_headers = list_lib_files("grpc", ("headers",))
  grpc_abseil_specs = list_abseil_specs("grpc")

  grpc_cronet_files = list(sorted(
    set(list_lib_files("grpc_cronet", ("src", "headers")))
    - set(grpc_private_files)
    - set([
      # We do not need cronet dedicated plugin registry
      "src/core/ext/transport/cronet/plugin_registry/grpc_cronet_plugin_registry.cc",
      # We do not need dummy cronet API for ObjC
      "src/core/ext/transport/cronet/transport/cronet_api_dummy.cc",
    ])))
  grpc_cronet_public_headers = list(sorted(
    set(list_lib_files("grpc_cronet", ("public_headers",)))
    - set(grpc_public_headers)))

  grpc_test_util_files = list(sorted(
    set(list_lib_files("end2end_tests", ("src", "headers")))
    - set(grpc_private_files)
    - set([
      # Subprocess is not supported in tvOS and not needed by our tests.
      "test/core/util/subprocess_posix.cc",
    ])))
  %>
  Pod::Spec.new do |s|
    s.name     = 'gRPC-Core'
    version = '${settings.version}'
    s.version  = version
    s.summary  = 'Core cross-platform gRPC library, written in C'
    s.homepage = 'https://grpc.io'
    s.license  = 'Apache License, Version 2.0'
    s.authors  = { 'The gRPC contributors' => 'grpc-packages@google.com' }

    s.source = {
      :git => 'https://github.com/grpc/grpc.git',
      :tag => "v#{version}",
      :submodules => true,
    }

    # gRPC podspecs depend on fix for https://github.com/CocoaPods/CocoaPods/issues/6024,
    # which was released in Cocoapods v1.2.0.
    s.cocoapods_version = '>= 1.2.0'

    s.ios.deployment_target = '7.0'
    s.osx.deployment_target = '10.9'
    s.tvos.deployment_target = '10.0'
    s.watchos.deployment_target = '4.0'

    s.requires_arc = false

    name = 'grpc'

    # When creating a dynamic framework, name it grpc.framework instead of gRPC-Core.framework.
    # This lets users write their includes like `#include <grpc/grpc.h>` as opposed to `#include
    # <gRPC-Core/grpc.h>`.
    s.module_name = name

    # When creating a dynamic framework, copy the headers under `include/grpc/` into the root of
    # the `Headers/` directory of the framework (i.e., not under `Headers/include/grpc`).
    #
    # TODO(jcanizales): Debug why this doesn't work on macOS.
    s.header_mappings_dir = 'include/grpc'

    # The above has an undesired effect when creating a static library: It forces users to write
    # includes like `#include <gRPC-Core/grpc.h>`. `s.header_dir` adds a path prefix to that, and
    # because Cocoapods lets omit the pod name when including headers of static libraries, the
    # following lets users write `#include <grpc/grpc.h>`.
    s.header_dir = name

    # The module map created automatically by Cocoapods doesn't work for C libraries like gRPC-Core.
    s.module_map = 'include/grpc/module.modulemap'

    # To compile the library, we need the user headers search path (quoted includes) to point to the
    # root of the repo, and the system headers search path (angled includes) to point to `include/`.
    # Cocoapods effectively clones the repo under `<Podfile dir>/Pods/gRPC-Core/`, and sets a build
    # variable called `$(PODS_ROOT)` to `<Podfile dir>/Pods/`, so we use that.
    #
    # Relying on the file structure under $(PODS_ROOT) isn't officially supported in Cocoapods, as it
    # is taken as an implementation detail. We've asked for an alternative, and have been told that
    # what we're doing should keep working: https://github.com/CocoaPods/CocoaPods/issues/4386
    #
    # The `src_root` value of `$(PODS_ROOT)/gRPC-Core` assumes Cocoapods is installing this pod from
    # its remote repo. For local development of this library, enabled by using `:path` in the Podfile,
    # that assumption is wrong. In such case, the following settings need to be reset with the
    # appropriate value of `src_root`. This can be accomplished in the `pre_install` hook of the
    # Podfile; see `src/objective-c/tests/Podfile` for an example.
    src_root = '$(PODS_ROOT)/gRPC-Core'
    s.pod_target_xcconfig = {
      'GRPC_SRC_ROOT' => src_root,
      'HEADER_SEARCH_PATHS' => '"$(inherited)" "$(GRPC_SRC_ROOT)/include"',
      'USER_HEADER_SEARCH_PATHS' => '"$(GRPC_SRC_ROOT)"',
      # If we don't set these two settings, `include/grpc/support/time.h` and
      # `src/core/lib/gpr/string.h` shadow the system `<time.h>` and `<string.h>`, breaking the
      # build.
      'USE_HEADERMAP' => 'NO',
      'ALWAYS_SEARCH_USER_PATHS' => 'NO',
      'GCC_PREPROCESSOR_DEFINITIONS' => '"$(inherited)" "COCOAPODS=1"',
      'CLANG_WARN_STRICT_PROTOTYPES' => 'NO',
    }

    s.default_subspecs = 'Interface', 'Implementation'
    s.compiler_flags = '-DGRPC_ARES=0 -Wno-comma'
    s.libraries = 'c++'

    # Like many other C libraries, gRPC-Core has its public headers under `include/<libname>/` and its
    # sources and private headers in other directories outside `include/`. Cocoapods' linter doesn't
    # allow any header to be listed outside the `header_mappings_dir` (even though doing so works in
    # practice). Because we need our `header_mappings_dir` to be `include/grpc/` for the reason
    # mentioned above, we work around the linter limitation by dividing the pod into two subspecs, one
    # for public headers and the other for implementation. Each gets its own `header_mappings_dir`,
    # making the linter happy.
    #
    # The list of source files is generated by a template: `templates/gRPC-Core.podspec.template`. It
    # can be regenerated from the template by running `tools/buildgen/generate_projects.sh`.
    s.subspec 'Interface' do |ss|
      ss.header_mappings_dir = 'include/grpc'

      ss.source_files = ${ruby_multiline_list(grpc_public_headers, 22)}
    end
    s.subspec 'Implementation' do |ss|
      ss.header_mappings_dir = '.'
      ss.libraries = 'z'
      ss.dependency "#{s.name}/Interface", version
      ss.dependency 'BoringSSL-GRPC', '0.0.5'
      abseil_version = '0.20190808.1'
      % for abseil_spec in grpc_abseil_specs:
      ss.dependency '${abseil_spec}', abseil_version
      % endfor
      ss.compiler_flags = '-DGRPC_SHADOW_BORINGSSL_SYMBOLS'

      ss.source_files = ${ruby_multiline_list(grpc_private_files, 22)}
      ss.private_header_files = ${ruby_multiline_list(grpc_private_headers, 30)}
    end

    # CFStream is now default. Leaving this subspec only for compatibility purpose.
    s.subspec 'CFStream-Implementation' do |ss|
      ss.dependency "#{s.name}/Implementation", version
    end

    s.subspec 'Cronet-Interface' do |ss|
      ss.header_mappings_dir = 'include/grpc'
      ss.source_files = ${ruby_multiline_list(grpc_cronet_public_headers, 22)}
    end

    s.subspec 'Cronet-Implementation' do |ss|
      ss.header_mappings_dir = '.'

      ss.dependency "#{s.name}/Interface", version
      ss.dependency "#{s.name}/Implementation", version
      ss.dependency "#{s.name}/Cronet-Interface", version

      ss.source_files = ${ruby_multiline_list(grpc_cronet_files, 22)}
    end

    s.subspec 'Tests' do |ss|
      ss.header_mappings_dir = '.'

      ss.dependency "#{s.name}/Interface", version
      ss.dependency "#{s.name}/Implementation", version

      ss.source_files = ${ruby_multiline_list(grpc_test_util_files, 22)}
    end

    # TODO (mxyan): Instead of this hack, add include path "third_party" to C core's include path?
    s.prepare_command = <<-END_OF_COMMAND
      sed -E -i '' 's;#include <openssl/(.*)>;#if COCOAPODS==1\\\n  #include <openssl_grpc/\\1>\\\n#else\\\n  #include <openssl/\\1>\\\n#endif;g' $(find src/core -type f \\( -path '*.h' -or -path '*.cc' \\) -print | xargs grep -H -c '#include <openssl_grpc/' | grep 0$ | cut -d':' -f1)
      find src/core/ third_party/upb/ -type f \\( -name '*.h' -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'
      find src/core/ third_party/upb/ -type f -name '*.grpc_back' -print0 | xargs -0 rm
      find src/core/ src/cpp/ -type f \\( -name '*.h' -or -name '*.c' -or -name '*.cc' \\) -print0 | xargs -0 -L1 sed -E -i'.grpc_back' 's;#include "(.*).upb.h";#if COCOAPODS==1\\\n  #include  "src/core/ext/upb-generated/\\1.upb.h"\\\n#else\\\n  #include  "\\1.upb.h"\\\n#endif;g'
      find src/core/ src/cpp/ -type f -name '*.grpc_back' -print0 | xargs -0 rm
    END_OF_COMMAND
  end