| #!/bin/bash |
| # Copyright 2022 The Fuchsia Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| # A wrapper script to run a Bazel binary with its pre-extracted |
| # install_base and its embedded JRE. It avoids extracting 164 MiB of |
| # data to the output_user_root the first time it is invoked, and |
| # unexpected conflicts with the installed JDK. |
| # |
| # Note that this script assumes there is a 'bazel-real' binary and an |
| # 'install_base' directory next to it. This is normally generated by |
| # the Fuchsia 'generate_bazel_install.py' script, or the corresponding |
| # LUCI recipe. |
| # |
| # IMPORTANT: The timestamps under install_base/ must be 10 years in the |
| # future, or Bazel will refuse to run. This is used as a way to check that |
| # the files have not been tampered with. |
| |
| set -eo pipefail |
| |
| # `readlink -f` that works on OSX too. |
| function get_realpath() { |
| if [ "$(uname -s)" == "Darwin" ]; then |
| local queue="$1" |
| if [[ "${queue}" != /* ]] ; then |
| # Make sure we start with an absolute path. |
| queue="${PWD}/${queue}" |
| fi |
| local current="" |
| while [ -n "${queue}" ]; do |
| # Removing a trailing /. |
| queue="${queue#/}" |
| # Pull the first path segment off of queue. |
| local segment="${queue%%/*}" |
| # If this is the last segment. |
| if [[ "${queue}" != */* ]] ; then |
| segment="${queue}" |
| queue="" |
| else |
| # Remove that first segment. |
| queue="${queue#*/}" |
| fi |
| local link="${current}/${segment}" |
| if [ -h "${link}" ] ; then |
| link="$(readlink "${link}")" |
| queue="${link}/${queue}" |
| if [[ "${link}" == /* ]] ; then |
| current="" |
| fi |
| else |
| current="${link}" |
| fi |
| done |
| |
| echo "${current}" |
| else |
| readlink -f "$1" |
| fi |
| } |
| |
| readonly BAZEL_WRAPPER_DIR="$(dirname "$(get_realpath "${BASH_SOURCE[0]}")")" |
| readonly BAZEL_INSTALL_DIR="${BAZEL_WRAPPER_DIR}" |
| readonly BAZEL_INSTALL_BASE="${BAZEL_INSTALL_DIR}"/install_base |
| |
| # Bazel will refuse to run if the timestamps for BAZEL_INSTALL_BASE are |
| # not at least 10 years in the future. Our CIPD archive does not preserve |
| # input timestamps, even if they were set correctly by install.sh, so |
| # check them here, and enfore them if needed. |
| |
| |
| case $OSTYPE in |
| linux*) |
| # A future timestamp in a format supported by GNU touch, which does |
| # not support the same format as BSD touch. |
| FUTURE_TIMESTAMP="2042-07-29 00:00:00" |
| CURRENT_TIMESTAMP="$(date -d @"$(stat -c %Y "${BAZEL_INSTALL_BASE}")" +"%Y-%m-%d %H:%M:%S")" |
| if [[ "${CURRENT_TIMESTAMP}" != "${FUTURE_TIMESTAMP}" ]]; then |
| touch -d "${FUTURE_TIMESTAMP}" $(find "${BAZEL_INSTALL_BASE}") |
| fi |
| ;; |
| darwin*|*bsd) |
| # A future timestamp that is supported by MacOS filesystems. |
| # See https://apple.fandom.com/wiki/2040_date_limit |
| FUTURE_TIMESTAMP=204002050000 |
| CURRENT_TIMESTAMP="$(stat -t +%Y%m%d%H%M "${BAZEL_INSTALL_BASE}")" |
| if [[ "${CURRENT_TIMESTAMP}" != "${FUTURE_TIMESTAMP}" ]]; then |
| touch -t "${FUTURE_TIMESTAMP}" $(find "${BAZEL_INSTALL_BASE}") |
| fi |
| ;; |
| *) |
| echo >&2 "ERROR: Unsupported system: $OSTYPE" |
| ;; |
| esac |
| |
| "${BAZEL_INSTALL_DIR}/bazel-real" \ |
| --install_base="${BAZEL_INSTALL_DIR}/install_base" \ |
| --server_javabase="${BAZEL_INSTALL_DIR}/install_base/embedded_tools/jdk" \ |
| "$@" |