GN: Build iOS framework in build_ios_libs.sh

webrtc/build/ios/build_ios_libs.sh

 #!/bin/bash
 
 #  Copyright 2015 The WebRTC project authors. All Rights Reserved.
 #
 #  Use of this source code is governed by a BSD-style license
 #  that can be found in the LICENSE file in the root of the source
 #  tree. An additional intellectual property rights grant can be found
 #  in the file PATENTS.  All contributing project authors may
 #  be found in the AUTHORS file in the root of the source tree.
 
 # Generates static FAT libraries for ios in out_ios_libs.
 
 # Exit on errors.
 set -e
 
 SCRIPT_DIR=$(cd $(dirname $0) && pwd)
 WEBRTC_BASE_DIR=${SCRIPT_DIR}/../../..
 
+function clean_artifacts {
+  local output_dir=$1
+  if [[ -d ${output_dir} ]]; then
+    echo "Deleting ${output_dir}"
+    rm -r ${output_dir}
+  fi
+}
+
+function build_webrtc {
+  local target_arch=$1
+  local flavor=$2
+  local build_type=$3
+  local ios_deployment_target=$4
+  local libvpx_build_vp9=$5
+  local custom_gn_options=$6
+
+  OUTPUT_DIR=${SDK_OUTPUT_DIR}/${target_arch}_libs
+  GN_ARGS="target_os=\"ios\" ios_enable_code_signing=false \
+use_xcode_clang=true is_component_build=false"
+
+  # Add flavor option.
+  if [[ ${flavor} = "debug" ]]; then
+    GN_ARGS="${GN_ARGS} is_debug=true"
+  elif [[ ${flavor} = "release" ]]; then
+    GN_ARGS="${GN_ARGS} is_debug=false"
+  else
+    echo "Unexpected flavor type: ${flavor}"
+    exit 1
+  fi
+
+  # Add the specified architecture.
+  OUTPUT_LIB=${OUTPUT_DIR}/${SDK_LIB_NAME}
+  GN_ARGS="${GN_ARGS} target_cpu=\"${target_arch}\""
+
+  # Add deployment target.
+  GN_ARGS="${GN_ARGS} ios_deployment_target=\"${ios_deployment_target}\""
+
+  # Add vp9 option.
+  GN_ARGS="${GN_ARGS} rtc_libvpx_build_vp9=${libvpx_build_vp9}"
+
+  # Add custom options.
+  if [[ -n "${custom_gn_options}" ]]; then
+    GN_ARGS="${GN_ARGS} ${custom_gn_options}"
+  fi
+
+  # Generate static or dynamic.
+  if [[ ${build_type} = "static_only" ]]; then
+    GN_TARGET_NAME="rtc_sdk_objc"
+  elif [[ ${build_type} == "framework" ]]; then
+    GN_TARGET_NAME="rtc_sdk_framework_objc"
+    GN_ARGS="${GN_ARGS} enable_dsyms=true enable_stripping=true"
+  fi
+
+  echo "Building WebRTC with args: ${GN_ARGS}"
+  gn gen ${OUTPUT_DIR} --args="${GN_ARGS}"
+  echo "Building target: ${GN_TARGET_NAME}"
+  ninja -C ${OUTPUT_DIR} ${GN_TARGET_NAME}
+
+  # Strip debug symbols to reduce size.
+  if [[ ${build_type} = "static_only" ]]; then
+    strip -S ${OUTPUT_DIR}/obj/webrtc/sdk/lib${GN_TARGET_NAME}.a -o \
+        ${OUTPUT_DIR}/lib${GN_TARGET_NAME}.a
+  fi
+}
+
+function usage {
+  echo "WebRTC iOS FAT libraries build script."
+  echo "Each architecture is compiled separately before being merged together."
+  echo "By default, the fat libraries will be created in out_ios_libs/."
+  echo "The headers will be copied to out_ios_libs/include."
+  echo "Usage: $0 [-h] [-b build_type] [-c] [-o output_dir]"
+  echo "  -h Print this help."
+  echo "  -b The build type. Can be framework or static_only."
+  echo "     Defaults to framework."
+  echo "  -c Removes generated build output."
+  echo "  -o Specifies a directory to output build artifacts to."
+  echo "     If specified together with -c, deletes the dir."
+  echo "  -r Specifies a revision number to embed if building the framework."
+  exit 0
+}
+
 SDK_OUTPUT_DIR=${WEBRTC_BASE_DIR}/out_ios_libs
 SDK_LIB_NAME="librtc_sdk_objc.a"
-GN_BASE_ARGS="target_os=\"ios\" is_debug=false ios_enable_code_signing=false \
-rtc_libvpx_build_vp9=false"
-GN_STATIC_TARGET_NAMES="rtc_sdk_peerconnection_objc field_trial_default \
-metrics_default"
+SDK_FRAMEWORK_NAME="WebRTC.framework"
 
-# TODO(tkchin): Restore functionality of old script to build dynamic framework,
-# symbols and license file.
+BUILD_FLAVOR="release"
+BUILD_TYPE="framework"
+IOS_DEPLOYMENT_TARGET="8.0"
+LIBVPX_BUILD_VP9="false"
+CUSTOM_GN_OPTS=""
+WEBRTC_REVISION="0"
 
-function build_static_webrtc {
-  local arch=$1
-  local xcode_arch=$2
+# Parse arguments.
+while getopts "hb:co:r:" opt; do
+  case "${opt}" in
+    h) usage;;
+    b) BUILD_TYPE="${OPTARG}";;
+    c) PERFORM_CLEAN=1;;
+    o) SDK_OUTPUT_DIR="${OPTARG}";;
+    r) WEBRTC_REVISION="${OPTARG}";;
+    *)
+      usage
+      exit 1
+      ;;
+  esac
+done
 
-  OUTPUT_DIR=${SDK_OUTPUT_DIR}/${arch}_libs
-  OUTPUT_LIB=${OUTPUT_DIR}/${SDK_LIB_NAME}
-  GN_ARGS="${GN_BASE_ARGS} target_cpu=\"${arch}\""
-  gn gen ${OUTPUT_DIR} --args="${GN_ARGS}"
-  ninja -C ${OUTPUT_DIR} ${GN_STATIC_TARGET_NAMES}
-  # Combine the object files together into a single archive and strip debug
-  # symbols.
-  find ${OUTPUT_DIR}/obj -type f -name "*.o" |
-     xargs ld -r -static -S -all_load -arch ${xcode_arch} -o ${OUTPUT_LIB}
-}
+if [[ ${PERFORM_CLEAN} -ne 0 ]]; then
+  clean_artifacts ${SDK_OUTPUT_DIR}
+  exit 0
+fi
 
-# Build all the common architectures.
-build_static_webrtc "arm" "armv7"
-build_static_webrtc "arm64" "arm64"
-build_static_webrtc "x86" "i386"
-build_static_webrtc "x64" "x86_64"
+# Build all architectures.
+build_webrtc "arm" ${BUILD_FLAVOR} ${BUILD_TYPE} \
+             ${IOS_DEPLOYMENT_TARGET} ${LIBVPX_BUILD_VP9} ${CUSTOM_GN_OPTS}
+build_webrtc "arm64" ${BUILD_FLAVOR} ${BUILD_TYPE} \
+             ${IOS_DEPLOYMENT_TARGET} ${LIBVPX_BUILD_VP9} ${CUSTOM_GN_OPTS}
+build_webrtc "x64" ${BUILD_FLAVOR} ${BUILD_TYPE} \
+             ${IOS_DEPLOYMENT_TARGET} ${LIBVPX_BUILD_VP9} ${CUSTOM_GN_OPTS}
 
-# Combine the libraries.
-lipo ${SDK_OUTPUT_DIR}/arm_libs/${SDK_LIB_NAME} \
-     ${SDK_OUTPUT_DIR}/arm64_libs/${SDK_LIB_NAME} \
-     ${SDK_OUTPUT_DIR}/x86_libs/${SDK_LIB_NAME} \
-     ${SDK_OUTPUT_DIR}/x64_libs/${SDK_LIB_NAME} \
-     -create -output ${SDK_OUTPUT_DIR}/${SDK_LIB_NAME}
+# Ignoring x86 except for static libraries for now because of a GN build issue
+# where the generated dynamic framework has the wrong architectures.
+
+# Create FAT archive.
+if [[ ${BUILD_TYPE} = "static_only" ]]; then
+  build_webrtc "x86" ${BUILD_FLAVOR} ${BUILD_TYPE} \
+               ${IOS_DEPLOYMENT_TARGET} ${LIBVPX_BUILD_VP9} ${CUSTOM_GN_OPTS}
+
+  ARM_LIB_PATH=${SDK_OUTPUT_DIR}/arm_libs/${SDK_LIB_NAME}
+  ARM64_LIB_PATH=${SDK_OUTPUT_DIR}/arm64_libs/${SDK_LIB_NAME}
+  X64_LIB_PATH=${SDK_OUTPUT_DIR}/x64_libs/${SDK_LIB_NAME}
+  X86_LIB_PATH=${SDK_OUTPUT_DIR}/x86_libs/${SDK_LIB_NAME}
+
+  # Combine the slices.
+  lipo ${ARM_LIB_PATH} ${ARM64_LIB_PATH} ${X64_LIB_PATH} ${X86_LIB_PATH} \
+       -create -output ${SDK_OUTPUT_DIR}/${SDK_LIB_NAME}
+elif [[ ${BUILD_TYPE} = "framework" ]]; then
+  ARM_LIB_PATH=${SDK_OUTPUT_DIR}/arm_libs
+  ARM64_LIB_PATH=${SDK_OUTPUT_DIR}/arm64_libs
+  X64_LIB_PATH=${SDK_OUTPUT_DIR}/x64_libs
+  X86_LIB_PATH=${SDK_OUTPUT_DIR}/x86_libs
+
+  # Combine the slices.
+  DYLIB_PATH="WebRTC.framework/WebRTC"
+  cp -R ${ARM64_LIB_PATH}/WebRTC.framework ${SDK_OUTPUT_DIR}
+  rm ${SDK_OUTPUT_DIR}/${DYLIB_PATH}
+  echo "Merging framework slices."
+  lipo ${ARM_LIB_PATH}/${DYLIB_PATH} \
+       ${ARM64_LIB_PATH}/${DYLIB_PATH} \
+       ${X64_LIB_PATH}/${DYLIB_PATH} \
+       -create -output ${SDK_OUTPUT_DIR}/${DYLIB_PATH}
+
+  # Remove stray mobileprovision if it exists until chromium roll lands.
+  # See https://codereview.chromium.org/2397433002.
+  PROVISION_FILE=${SDK_OUTPUT_DIR}/WebRTC.framework/embedded.mobileprovision
+  if [[ -e ${PROVISION_FILE} ]]; then
+    rm ${PROVISION_FILE}
+  fi
+
+  # Merge the dSYM slices.
+  DSYM_PATH="WebRTC.dSYM/Contents/Resources/DWARF/WebRTC"
+  cp -R ${ARM64_LIB_PATH}/WebRTC.dSYM ${SDK_OUTPUT_DIR}
+  rm ${SDK_OUTPUT_DIR}/${DSYM_PATH}
+  echo "Merging dSYM slices."
+  lipo ${ARM_LIB_PATH}/${DSYM_PATH} \
+      ${ARM64_LIB_PATH}/${DSYM_PATH} \
+      ${X64_LIB_PATH}/${DSYM_PATH} \
+      -create -output ${SDK_OUTPUT_DIR}/${DSYM_PATH}
+
+  # Modify the version number.
+  # Format should be <Branch cut MXX>.<Hotfix #>.<Rev #>.
+  # e.g. 55.0.14986 means branch cut 55, no hotfixes, and revision number 14986.
+  INFOPLIST_PATH=${SDK_OUTPUT_DIR}/WebRTC.framework/Info.plist
+  MAJOR_MINOR=$(PlistBuddy -c "Print :CFBundleShortVersionString" \
+                ${INFOPLIST_PATH})
+  VERSION_NUMBER="${MAJOR_MINOR}.${WEBRTC_REVISION}"
+  echo "Substituting revision number: ${VERSION_NUMBER}"
+  PlistBuddy -c "Set :CFBundleVersion ${VERSION_NUMBER}" ${INFOPLIST_PATH}
+  plutil -convert binary1 ${INFOPLIST_PATH}
+else
+  echo "BUILD_TYPE ${BUILD_TYPE} not supported."
+  exit 1
+fi
 
 echo "Done."