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# Copyright 2017 Google Inc. All rights reserved.
#
# 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.
# Set of utility functions to build and run go code with microfactory
#
# Inputs:
# ${TOP}: The top of the android source tree
# ${OUT_DIR}: The output directory location (defaults to ${TOP}/out)
# ${OUT_DIR_COMMON_BASE}: Change the default out directory to
# ${OUT_DIR_COMMON_BASE}/$(basename ${TOP})
# Ensure GOROOT is set to the in-tree version.
case $(uname) in
Linux)
export GOROOT="${TOP}/prebuilts/go/linux-x86/"
;;
Darwin)
export GOROOT="${TOP}/prebuilts/go/darwin-x86/"
;;
*) echo "unknown OS:" $(uname) >&2 && exit 1;;
esac
# Find the output directory
function getoutdir
{
local out_dir="${OUT_DIR-}"
if [ -z "${out_dir}" ]; then
if [ "${OUT_DIR_COMMON_BASE-}" ]; then
out_dir="${OUT_DIR_COMMON_BASE}/$(basename ${TOP})"
else
out_dir="out"
fi
fi
if [[ "${out_dir}" != /* ]]; then
out_dir="${TOP}/${out_dir}"
fi
echo "${out_dir}"
}
# Bootstrap microfactory from source if necessary and use it to build the
# requested binary.
#
# Arguments:
# $1: name of the requested binary
# $2: package name
function build_go
{
# Increment when microfactory changes enough that it cannot rebuild itself.
# For example, if we use a new command line argument that doesn't work on older versions.
local mf_version=2
local mf_src="${TOP}/build/soong/cmd/microfactory"
local out_dir=$(getoutdir)
local mf_bin="${out_dir}/microfactory_$(uname)"
local mf_version_file="${out_dir}/.microfactory_$(uname)_version"
local built_bin="${out_dir}/$1"
local from_src=1
if [ -f "${mf_bin}" ] && [ -f "${mf_version_file}" ]; then
if [ "${mf_version}" -eq "$(cat "${mf_version_file}")" ]; then
from_src=0
fi
fi
local mf_cmd
if [ $from_src -eq 1 ]; then
mf_cmd="${GOROOT}/bin/go run ${mf_src}/microfactory.go"
else
mf_cmd="${mf_bin}"
fi
rm -f "${out_dir}/.$1.trace"
${mf_cmd} -s "${mf_src}" -b "${mf_bin}" \
-pkg-path "android/soong=${TOP}/build/soong" -trimpath "${TOP}/build/soong" \
-o "${built_bin}" $2
if [ $from_src -eq 1 ]; then
echo "${mf_version}" >"${mf_version_file}"
fi
}
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