356 lines
10 KiB
Bash
356 lines
10 KiB
Bash
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#!/bin/bash
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set -e
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# Copyright 2019 Google Inc. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# Mounts the components of soong into a directory structure that Go tools
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# and editors expect.
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#####################################################################
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# Print the message to stderr with the prefix ERROR and abort this
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# script.
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#####################################################################
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function log_FATAL() {
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echo "ERROR:" "$*" >&2
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exit 1
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}
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#####################################################################
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# Print the message to stderr with the prefix WARN
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#####################################################################
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function log_WARN() {
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echo "WARN:" "$*" >&2
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}
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#####################################################################
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# Print the message with the prefix INFO.
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#####################################################################
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function log_INFO() {
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echo "INFO:" "$*"
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}
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#####################################################################
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# Find the root project directory of this repo. This is done by
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# finding the directory of where this script lives and then go up one
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# directory to check the ".repo" directory exist. If not, keep going
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# up until we find the ".repo" file or we reached to the filesystem
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# root. Project root directory is printed to stdout.
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#####################################################################
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function root_dir() (
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local dir
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if ! dir="$("${readlink}" -e $(dirname "$0"))"; then
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log_FATAL "failed to read the script's current directory."
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fi
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dir=${dir}/../../..
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if ! dir="$("${readlink}" -e "${dir}")"; then
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log_FATAL "Cannot find the root project directory"
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fi
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echo "${dir}"
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)
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#####################################################################
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# executes a shell command by printing out to the screen first and
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# then evaluating the command.
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#####################################################################
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function execute() {
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echo "$@"
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eval "$@"
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}
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#####################################################################
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# Returns the source directory of a passed in path from BIND_PATHS
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# array.
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#####################################################################
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function bind_path_src_dir() (
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local -r bind_path="$1"
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echo "${bind_path/%|*/}"
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)
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#####################################################################
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# Returns the destination directory of a passed in path from
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# BIND_PATHS array.
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#####################################################################
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function bind_path_dst_dir() (
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local -r bind_path="$1"
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echo "${bind_path/#*|}"
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)
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#####################################################################
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# Executes the bindfs command in linux. Expects $1 to be src
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# directory and $2 to be destination directory.
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#####################################################################
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function linux_bind_dir() (
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execute bindfs "$1" "$2"
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)
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#####################################################################
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# Executes the fusermount -u command in linux. Expects $1 to be the
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# destination directory.
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#####################################################################
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function linux_unbind_dir() (
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execute fusermount -u "$1"
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)
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#####################################################################
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# Executes the bindfs command in darwin. Expects $1 to be src
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# directory and $2 to be destination directory.
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#####################################################################
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function darwin_bind_dir() (
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execute bindfs -o allow_recursion -n "$1" "$2"
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)
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#####################################################################
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# Execute the umount command in darwin to unbind a directory. Expects
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# $1 to be the destination directory
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#####################################################################
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function darwin_unbind_dir() (
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execute umount -f "$1"
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)
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#####################################################################
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# Bind all the paths that are specified in the BIND_PATHS array.
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#####################################################################
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function bind_all() (
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local src_dir
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local dst_dir
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for path in ${BIND_PATHS[@]}; do
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src_dir=$(bind_path_src_dir "${path}")
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dst_dir=$(bind_path_dst_dir "${path}")
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mkdir -p "${dst_dir}"
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"${bind_dir}" ${src_dir} "${dst_dir}"
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done
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echo
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log_INFO "Created GOPATH-compatible directory structure at ${OUTPUT_PATH}."
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)
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#####################################################################
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# Unbind all the paths that are specified in the BIND_PATHS array.
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#####################################################################
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function unbind_all() (
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local dst_dir
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local exit_code=0
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# need to go into reverse since several parent directory may have been
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# first before the child one.
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for (( i=${#BIND_PATHS[@]}-1; i>=0; i-- )); do
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dst_dir=$(bind_path_dst_dir "${BIND_PATHS[$i]}")
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# continue to unmount even one of them fails
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if ! "${unbind_dir}" "${dst_dir}"; then
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log_WARN "Failed to umount ${dst_dir}."
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exit_code=1
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fi
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done
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if [[ ${exit_code} -ne 0 ]]; then
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exit ${exit_code}
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fi
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echo
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log_INFO "Unmounted the GOPATH-compatible directory structure at ${OUTPUT_PATH}."
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)
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#####################################################################
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# Asks the user to create the GOPATH-compatible directory structure.
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#####################################################################
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function confirm() (
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while true; do
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echo "Will create GOPATH-compatible directory structure at ${OUTPUT_PATH}"
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echo -n "Ok [Y/n]?"
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read decision
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if [ "${decision}" == "y" -o "${decision}" == "Y" -o "${decision}" == "" ]; then
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return 0
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else
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if [ "${decision}" == "n" ]; then
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return 1
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else
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log_WARN "Invalid choice ${decision}; choose either 'y' or 'n'"
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fi
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fi
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done
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)
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#####################################################################
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# Help function.
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#####################################################################
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function help() (
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cat <<EOF
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Mounts the components of soong into a directory structure that Go tools
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and editors expect.
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--help
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This help
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--bind
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Create the directory structure that Go tools and editors expect by
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binding the one to aosp build directory.
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--unbind
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Reverse operation of bind.
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If no flags were specified, the --bind one is selected by default.
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EOF
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)
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#####################################################################
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# Parse the arguments passed in to this script.
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#####################################################################
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function parse_arguments() {
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while [[ -n "$1" ]]; do
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case "$1" in
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--bind)
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ACTION="bind"
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shift
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;;
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--unbind)
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ACTION="unbind"
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shift
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;;
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--help )
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help
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shift
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exit 0
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;;
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*)
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log_WARN "Unknown option: $1"
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help
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exit 1
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;;
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esac
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done
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if [[ -z "${ACTION}" ]]; then
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ACTION=bind
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fi
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}
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#####################################################################
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# Verifies that a list of required binaries are installed in the
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# host in order to run this script.
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#####################################################################
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function check_exec_existence() (
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function check() {
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if ! hash "$1" &>/dev/null; then
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log_FATAL "missing $1"
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fi
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}
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local bins
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case "${os_type}" in
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Darwin)
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bins=("bindfs" "greadlink")
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;;
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Linux)
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bins=("bindfs" "fusermount")
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;;
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*)
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log_FATAL "${os_type} is not a recognized system."
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esac
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for bin in "${bins[@]}"; do
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check "${bin}"
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done
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)
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function main() {
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parse_arguments "$@"
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check_exec_existence
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if [[ "${ACTION}" == "bind" ]]; then
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if confirm; then
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echo
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bind_all
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else
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echo "skipping due to user request"
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exit 1
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fi
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else
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echo
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unbind_all
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fi
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}
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readonly os_type="$(uname -s)"
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case "${os_type}" in
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Darwin)
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bind_dir=darwin_bind_dir
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unbind_dir=darwin_unbind_dir
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readlink=greadlink
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;;
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Linux)
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bind_dir=linux_bind_dir
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unbind_dir=linux_unbind_dir
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readlink=readlink
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;;
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*)
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log_FATAL "${os_type} is not a recognized system."
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esac
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readonly bind_dir
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readonly unbind_dir
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readonly readlink
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if ! ANDROID_PATH="$(root_dir)"; then
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log_FATAL "failed to find the root of the repo checkout"
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fi
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readonly ANDROID_PATH
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#if GOPATH contains multiple paths, use the first one
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if ! OUTPUT_PATH="$(echo ${GOPATH} | sed 's/\:.*//')"; then
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log_FATAL "failed to extract the first GOPATH environment variable"
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fi
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readonly OUTPUT_PATH
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if [ -z "${OUTPUT_PATH}" ]; then
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log_FATAL "Could not determine the desired location at which to create a" \
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"Go-compatible workspace. Please update GOPATH to specify the" \
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"desired destination directory."
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fi
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# Below are the paths to bind from src to dst. The paths are separated by |
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# where the left side is the source and the right side is destination.
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readonly BIND_PATHS=(
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"${ANDROID_PATH}/build/blueprint|${OUTPUT_PATH}/src/github.com/google/blueprint"
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"${ANDROID_PATH}/build/soong|${OUTPUT_PATH}/src/android/soong"
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"${ANDROID_PATH}/art/build|${OUTPUT_PATH}/src/android/soong/art"
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"${ANDROID_PATH}/external/golang-protobuf|${OUTPUT_PATH}/src/google.golang.org/protobuf"
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"${ANDROID_PATH}/external/llvm/soong|${OUTPUT_PATH}/src/android/soong/llvm"
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"${ANDROID_PATH}/external/clang/soong|${OUTPUT_PATH}/src/android/soong/clang"
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"${ANDROID_PATH}/external/robolectric-shadows/soong|${OUTPUT_PATH}/src/android/soong/robolectric"
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)
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main "$@"
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