#!/bin/bash -e

export OUT_DIR=${OUT_DIR:-out}

if [ -e ${OUT_DIR}/soong/.soong.in_make ]; then
  # If ${OUT_DIR} has been created without --skip-make, Soong will create an
  # ${OUT_DIR}/soong/build.ninja that leaves out many targets which are
  # expected to be supplied by the .mk files, and that might cause errors in
  # "m --skip-make" below. We therefore default to a different out dir
  # location in that case.
  AML_OUT_DIR=out-aml
  echo "Avoiding in-make OUT_DIR '${OUT_DIR}' - building in '${AML_OUT_DIR}' instead"
  OUT_DIR=${AML_OUT_DIR}
fi

source build/envsetup.sh

my_get_build_var() {
  # get_build_var will run Soong in normal in-make mode where it creates
  # .soong.in_make. That would clobber our real out directory, so we need to
  # run it in a different one.
  OUT_DIR=${OUT_DIR}/get_build_var get_build_var "$@"
}

PLATFORM_SDK_VERSION=$(my_get_build_var PLATFORM_SDK_VERSION)
PLATFORM_VERSION=$(my_get_build_var PLATFORM_VERSION)
PLATFORM_VERSION_ALL_CODENAMES=$(my_get_build_var PLATFORM_VERSION_ALL_CODENAMES)

# PLATFORM_VERSION_ALL_CODENAMES is a comma separated list like O,P. We need to
# turn this into ["O","P"].
PLATFORM_VERSION_ALL_CODENAMES=${PLATFORM_VERSION_ALL_CODENAMES/,/'","'}
PLATFORM_VERSION_ALL_CODENAMES="[\"${PLATFORM_VERSION_ALL_CODENAMES}\"]"

# Logic from build/make/core/goma.mk
if [ "${USE_GOMA}" = true ]; then
  if [ -n "${GOMA_DIR}" ]; then
    goma_dir="${GOMA_DIR}"
  else
    goma_dir="${HOME}/goma"
  fi
  GOMA_CC="${goma_dir}/gomacc"
  export CC_WRAPPER="${CC_WRAPPER}${CC_WRAPPER:+ }${GOMA_CC}"
  export CXX_WRAPPER="${CXX_WRAPPER}${CXX_WRAPPER:+ }${GOMA_CC}"
  export JAVAC_WRAPPER="${JAVAC_WRAPPER}${JAVAC_WRAPPER:+ }${GOMA_CC}"
else
  USE_GOMA=false
fi

SOONG_OUT=${OUT_DIR}/soong
mkdir -p ${SOONG_OUT}
SOONG_VARS=${SOONG_OUT}/soong.variables

cat > ${SOONG_VARS}.new << EOF
{
    "Platform_sdk_version": ${PLATFORM_SDK_VERSION},
    "Platform_sdk_codename": "${PLATFORM_VERSION}",
    "Platform_version_active_codenames": ${PLATFORM_VERSION_ALL_CODENAMES},

    "DeviceName": "generic_arm64",
    "HostArch": "x86_64",
    "Aml_abis": true,

    "UseGoma": ${USE_GOMA}
}
EOF

if [ -f ${SOONG_VARS} ] && cmp -s ${SOONG_VARS} ${SOONG_VARS}.new; then
  # Don't touch soong.variables if we don't have to, to avoid Soong rebuilding
  # the ninja file when it isn't necessary.
  rm ${SOONG_VARS}.new
else
  mv ${SOONG_VARS}.new ${SOONG_VARS}
fi

m --skip-make "$@"